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1. 0067 The discussion below will focus on four aspects of the present invention 1 the TXP2 mobile object communi cation protocol 2 mobile agents 3 virtual spaces and 4 virtual sessions 0068 The TXP2 mobile object communication protocol provides for communication between computing devices over a selectable communication medium A particular strength of TXP2 is the ability to overcome the inherent limitations of wireless networks However TXP2 is a multi layer transportation protocol that combines certain aspects of the OSI model for transmitting data from one computer or electronic device to another and can thus be applied to wire less as well as traditional wired communication networks UDP is utilized in a dual protocol method rather than TCP for transmission of data and achieves dramatically higher aver age data transmission rates over both wired and wireless networks than does TCP IP 0069 Mobile agents are data communication objects con taining both data and executable code necessary for perform ing specific tasks on a computer or other computerized device The agents utilize the TXP2 protocol to travel from one computer to another Further the agents can perform tasks at the receiving computer or electronic device with complete independence from the sending device 0070 A virtual space information object provides the execution context for the mobile agent TXP2 uses the virtual space on the sending computer to d
2. MJOMJON podsueJ podsueJ o dd sso uoneoraovy ZdX1 uolilss s vOL cdXl uonejuesaJqd uoneognddy co ISO 004 A US 2008 0198787 A1 Aug 21 2008 Sheet 9 of 10 Patent Application Publication 9qoJd 8 OI Burssiu jueuu6es dan 80 MVN paAri9991 sjuauBas JAN ZOE MOV vel ZOL J9M9S aa SON sjuaubas gan Ie Z08 p9AI929J J AI9991 yeu Auen Y 9BESSIN ogold o US 2008 0198787 A1 Aug 21 2008 Sheet 10 of 10 Patent Application Publication 6 OI e409 bo i ev09 ooeds jen PIRA juaby E8LI eoeds jenylA odid qz09 8209 a rie terra EE ee IO50 O1d eege SE dX L 90 suede ie adid jueBy 2709 smi ezo eoedg Jeny 888 ear 9LI Q IIqOW uotss s JENIN 9811 adig qozi jueBy 9209 j090 0Jd cdXL N PEL el HEJ lt s J A19S qr09 22805 IenuHiA Sr09 oeds JenulA Ts s US 2008 0198787 Al MOBILE DATA OBJECT TRANSMISSION OVER WIRELESS COMMUNICATION NETWORKS USING UDP AND TWO LEVEL PROTOCOL CROSS REFERENCE TO RELATED APPLICATIONS 0001 This application claims the benefit under 35 U S C 119 e of U S Provisional Patent Application Ser No 60 890 109 entitled Mobile Data Object Transmission Over Wireless Communication Networks Using UDP and Two Level Protocol filed Feb 15 2007 which is incorporated herein by reference as if set forth herein in its entirety TECHNICAL FIELD 0002 The present invention generally relates to a data communication
3. Patent Application Publication Aug 21 2008 Sheet 6 of 10 US 2008 0198787 A1 C START gt Receive UDP Segment 532 First Yes UDP Segment 534 Creat TXU Packet wo 530 X Add UDP Segment to TXU Packet 538 First Yes UDP Segment in Window 540 Final Window of No TXU Packet 542 No Final UDP Segment Yes Send ACK of TXU Packet 544 546 No All Segments of TXU Packet Received 554 Missing UDP Segment s 548 No Send ACK 556 Final Segment of Final TXU Packet 558 Identfiy Missing UDP Segment s 550 Yes Send NAK 552 560 CEND gt FIG 5B TXP2 Receiver Algorithm Patent Application Publication Aug 21 2008 Sheet 7 of 10 US 2008 0198787 A1 600 X d Server Mobile G 134 Device 102 P Agent 120 Agent 120 N Agent 120 Virtual Space 604 Virtual Space 604 Object Communication Object Communication Protocol Protocol 124 TXM TXM 608b JJ TXU 606a TXU Packets 126 606b 610b TX m tom SN DDDDDLDUDD UDP segments 128 608a UDP Protocol Protocol 612a Virtual Session 141461 FIG 6 TXP2 Communications Protocol US 2008 0198787 A1 Aug 21 2008 Sheet 8 of 10 Patent Application Publication TAQOW ZdXl ONY ISO N33AAL38 SHON3 HHHHIG Z DIA jgotS ug SS920V MJOMJON Muri ejeg jeuJeju
4. and a system bus that couples various system components including the system memory to the processing unit The computer will typically include one or more magnetic hard disk drives also called data stores or data storage or other names for reading from and writing to The drives and their associated computer readable media provide nonvolatile storage of computer executable instructions data structures program modules and other data for the computer Although the exem plary environment described herein employs a magnetic hard US 2008 0198787 Al disk a removable magnetic disk removable optical disks other types of computer readable media for storing data can be used including magnetic cassettes flash memory cards digital video disks DVDs Bernoulli cartridges RAMs ROMs and the like 0062 Computer program code that implements most of the functionality described herein typically comprises one or more program modules may be stored on the hard disk or other storage medium This program code as is known to those skilled in the art usually includes an operating system one or more application programs other program modules and program data A user may enter commands and informa tion into the computer through keyboard pointing device or other input devices not shown such as a microphone game pad satellite dish scanner or the like These and other input devices are often connected to the processing unit through
5. retransmitting missing UDP segments to the server the retransmitting comprising 0225 identifying a plurality of missing UDP seg ments according to the NAK message 0226 grouping the plurality of missing UDP seg ments into a retransmit window the retransmit win dow having a number of UDP segments correspond ing to a count of missing UDP segments and 0227 sending the retransmit window to the server and 0228 atthe server upon determination that a final TXU packet for the frame has been received recreating the frame by reassembling the plurality of TXU packets 0229 2 The method of claim 1 wherein the selectable communication medium is a wireless network 0230 3 The method of claim 2 wherein the selectable communication medium includes one or more of a Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 0231 4 The method of claim 3 further comprising the step of 0232 switching to a different selectable communica tion media during transmission of the data US 2008 0198787 Al 0233 5 The method of claim 3 further comprising the step of 0234 switching to a different selectable communica tion media during reception of the data 0235 6 The method of claim 1 wherein the predeter mined number of UDP segments for the at least one window is an optimized valu
6. wherein the UDP type indicates a value selectable from UDP Segment UDP ACK UDP NAK and UDP Probe 0401 102 Thesystem of claim 100 wherein the packet ID identifies the TXU packet to which the UDP segment is des ignated US 2008 0198787 Al 0402 103 The system of claim 100 wherein the segment number indicates a sequential ordering of the UDP segment within the TXU packet 0403 104 The system of claim 100 wherein the last seg ment indicates the segment number corresponding to the final UDP segment in the TXU packet 0404 105 The system of claim 87 wherein the first TXU module is further configured for waiting a predetermined probe time without receiving an ACK or a NAK before sending a probe message to the second TXU module 0405 106 The system of claim 105 wherein the probe message is a type of the UDP segment 0406 107 The system of claim 106 wherein the probe message includes a segment number ofa recent UDP segment for which the ACK was received 0407 108 The system of claim 105 wherein a predeter mined probe retry count denotes a count of probe messages to send to the second TXU module without receiving the ACK or the NAK before reporting an error 0408 109 The system of claim 87 wherein the first com puting device is further configured for 0409 upon sending a NAK to the second computing device waiting a predetermined probe time without receiving the UDP segment before sending a prob
7. wherein the object includes the data and executable code 0437 123 The method of claim 113 wherein the data length is a 4 byte field indicating the size in bytes of the data buffer 0438 124 The method of claim 113 wherein the data buffer is a variable size buffer containing the data to be trans mitted 0439 125 The method of claim 113 wherein the packet type is a one byte field indicating a value for the packet type 0440 126 The method of claim 113 wherein the session ID is a 4 byte field identifying a destination entity US 2008 0198787 Al 0441 127 The method of claim 126 wherein the pipe number is a 4 byte field identifying a connection to the des tination entity 0442 128 The method of claim 113 wherein the packet length is a 2 byte field indicating the size in bytes of the packet data 0443 129 The method of claim 113 wherein the UDP type is a one byte field indicating a value selectable from UDP Segment UDP ACK UDP NAK and UDP Probe 0444 130 The method of claim 113 wherein the packet ID is atwo byte field identifying the TXU packet to which the UDP segment is designated 0445 131 The method of claim 113 wherein the segment number is a one byte field indicating a sequential ordering of the UDP segment within the TXU packet 0446 132 The method of claim 113 wherein the last segment is a one byte field indicating the segment number corresponding to a final segment in the TXU packet
8. 0447 133 The method of claim 113 wherein the UDP body comprises UDP segment data to be transmitted 0448 134 The method of claim 113 further comprising the step of 0449 at the remote electronic device waiting a prede termined probe time without receiving an ACK or a NAK before sending a probe message to the server 0450 135 The method of claim 134 wherein the probe message is a type of the UDP segment 0451 136 The method of claim 135 wherein the probe message includes the segment number of a recent UDP seg ment for which the ACK was received 0452 137 The method of claim 134 wherein a predeter mined probe retry count denotes a number of probe messages to send to the server without receiving the ACK or the NAK before reporting an error 0453 138 A method for wireless data communication between a first computing device and a second computing device comprising steps of 0454 transmitting data from the first computing device througha selectable wireless communication medium to the second computing device the transmitting compris ing 0455 constructing a frame for data the frame com prising a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corresponding to the data length 0456 dividing the frame into a plurality of TXU packets that collectively comprise the frame body wherein a TXU packet from the pl
9. 0728 at the first computing device waiting a predeter mined probe time without receiving the ACK or a NAK prior to sending at least one probe message to the second computing device 0729 308 The method of claim 307 wherein the at least one probe message includes the segment number of a recent UDP segment for which the ACK was received 0730 309 The method of claim 307 wherein a predeter mined probe retry count denotes a count of the at least one probe message to send to the second computing device with out receiving the ACK or the NAK before reporting an error 0731 310 The method of claim 283 further comprising the step of 0732 at the second computing device upon sending a NAK to the first computing device waiting a predeter mined probe time without receiving the UDP segment prior to sending at least one probe message to the first computing device 0733 311 The method of claim 310 wherein the at least one probe message includes the segment number for the UDP segment most recently received 0734 312 The method of claim 310 wherein a predeter mined probe retry count denotes a count of the at least one probe message to send to the first computing device without receiving the UDP segment before reporting an error 0735 Aspect 5 Virtual Space Methods and Systems for transporting and executing agents to perform portions oftasks among multiple computing devices 0736 313 A method for transporting and exe
10. 38 wherein the at least one probe message includes a segment number ofa recent UDP segment for which the ACK was received 40 The method of claim 38 wherein a predetermined probe retry count denotes the number ofthe at least one probe message to send to the second computing device without receiving the ACK or the NAK before reporting an error 41 The method of claim 26 further comprising the step of at the second computing device upon sending a NAK to the first computing device waiting a predetermined probe time without receiving a UDP segment prior to sending at least one probe message to the first computing device 42 The method of claim 41 wherein the at least one probe message includes a segment number for the UDP segment most recently received 43 The method of claim 41 wherein a predetermined probe retry count denotes the number ofthe at least one probe message to send to the first computing device without receiv ing the UDP segment before reporting an error 44 A method for transporting agents having a plurality of related tasks that enables agents to perform tasks at separate computing devices comprising steps of at a first computing device having an agent with a first executable code for a first task and a second executable code for a second task upon determination that the first task 1s required determining whether first resources are available at the first computing device upon verifying that first
11. 604a at mobile device 102b For communications between Applications A at mobile device 102a and mobile device 1025 the agent 120a may then transport from mobile device 102a to mobile device 1025 using pipe 118a that is allocated through the virtual session 116 0203 Further another application B at server 134 requires connectivity with application B at mobile device 1025 The TXP2 protocol 602c creates a virtual space 6045 at server 134 and TXP2 protocol 6025 creates a corresponding virtual space 604b at mobile device 1025 For communications between Applications B at server 134 and mobile device 1025 the agent 1205 may then transport from server 134 to mobile device 1025 using pipe 1185 that is allocated through the virtual session 116 0204 A virtual space 604 is allocated at as many locations as necessary for agent 120 transport between the respective computing devices at those locations A pipe 118 is allocated for a specific communication between two computing devices and is release when that communication is complete However a virtual session 116 may contain many pipes 118 between any number of computing devices that communicate through the virtual session 116 0205 The foregoing description of the exemplary embodiments of the inventions have been presented only for the purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the precise forms disclosed Many modifications and
12. DIW fl of oa SEKR Ee 0E MOV ZOE NOV bs rcd es zs se ss om e 28 is pesen sl S n E GE e Ee A W uus c dor COR MOV fee ZOE MOV egz jesxoeg NXL qi JM nx Eed NXL oueueons ee 0ueU898 muc d oueueog FCL ouieijj 00 Se Patent Application Publication Aug 21 2008 Sheet 4 of 10 US 2008 0198787 A1 e o a Sender constructs frame 402 Sender divides frame into TXU packets a0 Sender divides TXU packets into UDP segments Sender assembles groups of UDP segments in windows e eo Co o Sender sends windows to receiver 410 Receiver processes windows 412 Receiver assembles the UDP segments to recreate TXU packets 414 Receiver assembles the TXU packets to recreate frame 416 FIG 4 TXP2 High Level Algorithm Patent Application Publication Aug 21 2008 Sheet 5 of 10 US 2008 0198787 A1 START gt P ia Construct Frame for Agent Data 502 Divide Frame into TXU Packets 594 Divide Each TXU Packet into UDP Segments 506 Group UDP Segments into Windows 508 Send Next Available Window to Receiver 510 Receive Message from Receiver 512 ACK Message NAK Message 516 NO Identify Missing UDP Segment s 538 YES Group Missing UDP Segment s into Retransmit Window 520 Send Retransmit Window to Receiver 522 C END gt FIG 5A TXP2 Sender Algorithm
13. TXP2 US 2008 0198787 A1 Aug 21 2008 Sheet 1 of 10 Patent Application Publication Zd L pue gan BUISN sysomjeu uoneoiunujuuoo TEE SSOJOJIM JOAO UOIsSIUISUEJ J2e qo eyep sjiqowW oneuojny O j oien see L ERN MOST Re ee posto 5 Se O zaz meti ois SOS pa 7 em 3 l gel I l uonelado l AIsu ul per aue 89 Ses oz af I Aug epp amus DS Oz Lief l wejs s zug 10p10 Aide ue A i LICIEIEI 3 d AE suoneoi ddy gz dan asn pu nooo sss oz bov co SA 3DASJ OI sent eAisueju eAisuayu S algo SS SES AISUu Uu SAISUDJU J AJ9S AON Sy US 2008 0198787 A1 Aug 21 2008 Sheet 2 of 10 Patent Application Publication dX L 104 sdiysuojejas jueuiBes dan pue jexoegd nx SWL Cou 9vc jueuiDas Jse juaulbas ES dd OR eS U UE C CUCU g u u6 s dan magara aaa ca E IZ T aaa aa A 8c u9Z q9z seMque j9ped s q POG pg OEZ I 9ZL Jexoed Z pe 13xovd XI S35 EE s q u 7 8ed poq wes4 OIZ sej qg gp jepeeu owelj ZOZ ce 802 902 x owen d L Jang geq uel ig uey 1 yzl i NAVA keca Z E I Sr Hv 0 US 2008 0198787 A1 Aug 21 2008 Sheet 3 of 10 Patent Application Publication SOLIEUBOS uoISSIUISUEJ 9 pue uoissiulsueiJ JODOJOJA ZdXl
14. a NAK message to the remote elec tronic device the NAK message specifying the segment number for each missing segment upon determination that the segment number indicates the last segment verifying that all UDP segments have been received upon determination that all UDP segments have been received sending an ACK message to the remote elec tronic device upon determination that a final TXU packet has been received recreating a frame by reassembling a plurality of TXU packets the frame comprising a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer for data and corresponding to the data length 15 The method of claim 14 wherein the selectable com munication medium is a wireless network 16 The method of claim 15 wherein the selectable com munication medium includes one or more ofa Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 17 The method of claim 16 further comprising the step of switching to a different selectable communication media during reception of the data 18 The method of claim 14 further comprising the step of upon sending a NAK to the remote electronic device wait ing a predetermined probe time without receiving the UDP segment before sending a probe message to
15. a first com puting device through a wireless communication medium comprising steps of 0560 receiving a plurality of UDP segments wherein a UDP segment from the plurality of UDP segments com prises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data pay load of predetermined size 0561 upon determination that the segment number indicates a first UDP segment creating a TXU packet the TXU packet comprising a packet header and a packet body the packet header including a packet type asession ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length 0562 upon determination that the segment number indicates the UDP segment sequentially after the first UDP segment adding the UDP segment to the TXU packet 0563 upon determination that the segment number indicates an initial segment in a window prior to a final window initial segment for the TXU packet sending an ACK to the first computing device 0564 upon determination that the UDP segment was not received sending a NAK message to the first com puting device the NAK message specifying the segment number for each missing segment 0565 upon determination that the segment number indicates the last segment verifying that all UDP seg ments have been received 0566 upon determination that all UDP segments have been r
16. a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length dividing the TXU packet into UDP segments comprising a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data payload of predetermined size group ing the UDP segments into at least one window for transmis sion through the selectable communication medium wherein the window includes a predetermined number of UDP seg ments and sending the window to the server and at the server receiving the data through the selectable communica tion medium from the remote electronic device comprising receiving at least one UDP segment assembling UDP seg ments to recreate the TXU packet upon determination that the segment number ofthe UDP segment indicates a window segment prior to a final window segment for the TXU packet sending an ACK to the remote electronic device upon deter Aug 21 2008 mination that at least one UDP segment was not received sending a NAK message to the remote electronic device specifying the segment number for each missing segment and upon determination that a final UDP segment for the TXU packet has been received sending an ACK message to the remote electronic device at the remote electronic device upon receiving the ACK message from the server if a next window remains to be sent sending the next wind
17. agent The TXM typically probes the agent for example at one minute inter vals to inquire as to agent status and to verify that the system is working properly Probe functionality is discussed in greater detail below 0145 The TXU 610a at the mobile device 102 uses a negative acknowledgement window protocol to send each TXU packet 126 to the TXU 6105 at the TXP2 server 134 TXU provides guaranteed delivery of the frame data agent 120 using UDP for transmission of segments UDP is a connectionless protocol that supports sending small fixed size segments TXU 610 uses the sliding window algorithm described above to implement segmentation and reassembly TXU packets 126 are divided into segments that are transmit ted individually and reassembled upon being received Since the communication is connectionless segments are some times lost delivered out of order or delivered multiple times By windowing the segments and providing acknowledgments of received segments and retransmissions of missing seg ments the TXU 610 protocol assures that only whole packets are sent and received 0146 Upon receiving the UDP segments 128 reconstruc tion of the TXU packets 126 begins The reconstructed TXU packets 126 are then used to reconstruct the frame 124 When a TXU packet 126 has arrived the TXU 610 notifies the TXM 608 Ifthe TXU packet 126 is the first packet of the frame 124 the TXM 608 attempts to create the frame 124 If the TXU packet 12
18. detected before the final window is sent It should also be noted that the window for retransmitting missing segments 306 typically contains less UDP segments 128 than a typical window unless an entire window of UDP segments 128 is missing 0119 Upon receiving the last segment s24 of window W4 an ACK 302 is sent to the sender if all UDP segments 128 for TXU packet 1265 have been received TXP2 determines that the last UDP segment 128 is received by matching the seg ment number 246 of the UDP segment 128 with the last segment 248 Upon determining that the last segment 248 has been received a determination is made whether all UDP segments 128 for the TXU packet 126 have been received If all UDP segments 128 for the TXU packet 126 have been received then an ACK 302 is sent 0120 It should be noted that an ACK 302 is not sent after receiving the first segment s17 of the last window W4 Rather a final ACK 302 is sent for the last window after receiving the last segment s24 in this instance Receipt ofthe final ACK 302 confirms that the first window ofthe next TXU packet 126 can be sent 0121 Scenario 3 0122 In scenario 3 TXU Packet 126c is divided into UDP segments 128 numbered s1 s24 As above the window size in this scenario is 8 UDP segments 128 therefore the mobile device 102 sender groups 8 UDP segments 128 per window and sends the first window W1 to the receiving server 134 As in the previous scenario upon receiving t
19. from the plurality of UDP segments 0803 assembling the UDP segments to recreate a TXU packet 0804 upon determination that at least one UDP segment from the plurality of UDP segments was not received sending a NAK message to the first module space the NAK message specifying a seg ment number for each missing UDP segment and 0805 upon determination that a final UDP seg ment for the TXU packet has been received send ing an ACK message to the first computing device 0806 at the first module space upon receiving a NAK message retransmitting missing UDP segments to the second module space and US 2008 0198787 Al 0807 at the second module space upon determination that a final TXU packet for the frame has been assembled 0808 recreating the frame for the agent by reassem bling the plurality of TXU packets and 0809 executing the task 0810 In view of the foregoing detailed description of pre ferred embodiments of the present invention it readily will be understood by those persons skilled in the art that the present invention is susceptible to broad utility and application While various aspects have been described in the context of a preferred embodiment additional aspects features and methodologies of the present invention will be readily dis cernable therefrom Many embodiments and adaptations of the present invention other than those herein described as well as many variations modifications and equiv
20. identifies the miss ing UDP segment s 128 and the receiving computing device then continues to receive UDP segments 128 at step 532 0139 Ifno missing UDP segments 128 are detected then the receiving of UDP segments 128 continues at step 532 until each TXU packet 126 is received and the frame 124 is recre ated TXP2 Dual Protocol 0140 FIG 6 is an overview of exemplary aspects of the TXP2 communications protocol functionality 600 A mobile device 102 such as a handheld computer for example com municates with a TXP2 server 134 using the TXP2 protocol 602 over a selected communication medium The TXP2 pro tocol 602 deconstructs an agent 120 from a virtual space 604 using a two level object communication protocol OCP 606a The OCP 606a deconstructs the agent 120 into the frame 124 TXU packets 126 and UDP segments 128 which are then transmitted from the mobile device 102 to the TXP2 server 134 over the selected medium via the UDP protocol 612a The UDP protocol 612a at the mobile device 102 con trols the actual transmission of the UDP segments 128 through a designated pipe 118 of a virtual session 116 to the TXP2 server 134 where receipt of the UDP segments 128 is controlled by the UDP protocol 6125 Of course communi cations through the pipe 118 have full duplex capability and Aug 21 2008 therefore it should be noted that the TXP2 server 134 also has capability for sending the agent 120 back to the mobile device 102 thro
21. known electrical optical or wireless connections 0063 The main computer that affects many aspects of the inventions will typically operate in a networked environment using logical connections to one or more remote computers or data sources which are described further below Remote computers may be another personal computer a server a router a network PC a peer device or other common network node and typically include many or all of the elements described above relative to the main computer system in which the inventions are embodied The logical connections between computers include a local area network LAN a wide area network WAN and wireless LANs WLAN that are presented here by way of example and not limitation Such networking environments are commonplace in office wide or enterprise wide computer networks intranets and the Inter net 0064 When used in a LAN or WLAN networking envi ronment the main computer system implementing aspects of the invention is connected to the local network through a network interface or adapter When used ina WAN or WLAN networking environment the computer may include a modem a wireless link or other means for establishing com munications over the wide area network such as the Internet Inanetworked environment program modules depicted rela tive to the computer or portions thereof may be stored in a remote memory storage device It will be appreciated that the network connections de
22. method of claim 280 wherein a predeter mined probe retry count denotes the number of the at least one probe message to send to the first computing device without receiving the UDP segment before reporting an error 0679 283 A method for transporting agents having a plu rality of related tasks that enables agents to perform tasks at separate computing devices comprising steps of 0680 ata first computing device having an agent with a first executable code for a first task and a second US 2008 0198787 Al executable code for a second task upon determination that the first task is required 0681 determining whether first resources are avail able at the first computing device 0682 upon verifying that first resources are available at the first computing device performing the first task 0683 upon determination that the second task is required determining whether second resources are available at the first computing device 0684 upon determination that the second resources are not available at the first computing device deter mining whether the second resources are available at a second computing device 0685 upon determination that the second resources are available at the second computing device trans porting the agent to the second computing device the transporting comprising 0686 transmitting the agent through a selectable communication medium to the second computing device the transmitting comprisin
23. needed manual US 2008 0198787 Al 0094 Uponacquiring the product service manual from the database 136 preparations are made for transporting the agent 120 and the manual back to the mobile device 102 However a determination is made that the field service tech nician s 130 travel to the service call will take him out of cellular range such that only satellite 108 communications will be available approximately half way through the trip A determination is made that since the manual is relatively small and can be completely transported before the technician is out of range thus the cost for transporting the manual over cellular is beneficial and proceeds accordingly 0095 While onthe service call a new service call is sched uled from the home office and a determination is made that the field service technician 130 can also handle this call since it is only 45 minutes from the current service call However the technician is presently out of cellular range so a determi nation is made that satellite will be used to update his sched ule A communication is sent via satellite 108 to the mobile device 102 advising ofa schedule change The mobile device sends an agent 120 to the server through the satellite 108 communication medium to acquire the new schedule Upon arrival at the server 134 the agent 120 executes the server intensive code 114 and acquires the new schedule and neces sary customer information Further the agent 120 det
24. number 8 status 9 an agent list 10 a frame list 11 an error code and 12 an error message 0169 A version ID contains the version number of the virtual space 604 TXP2 uses the version number to commu nicate with different versions of TXP2 that are running on the electronic devices that are communicating 0170 The session ID is generated by TXP2 using both the user ID and the device ID of the communicating electronic device The session ID uniquely identifies the virtual session 116 that is associated with the virtual space 604 The session ID is unique across TXP2 communication participants so long as the device ID is unique 0171 The user ID is provided by the application at the computing device associated with this particular virtual space 604 0172 The device ID is provided by the application or alternately generated by TXP2 Aug 21 2008 0173 The encryption key is generated and exchanged using Diffie Hellman key exchange 0174 The IP address contains the network address of the local electronic device that is running the TXP2 module 0175 The IP port number contains the network port num ber 0176 The status contains the status of the virtual space 604 0177 The agent list contains a list of the agents 120 0178 The frame list contains a list of frames 124 waiting to be sent or received at the local electronic device 0179 The error code contains the latest error code for any errors tha
25. of claim 138 wherein the agent type is a field indicating a value selectable from realtime batch and auto 0474 146 The method of claim 138 wherein the agent name is contains a name of an object wherein the object includes the data and executable code 0475 147 The method of claim 138 wherein the data length is a 4 byte field indicating the size in bytes of the data buffer 0476 148 The method of claim 138 wherein the data buffer is a variable size buffer containing the data to be trans mitted 0477 149 The method of claim 138 wherein the packet type indicates a value for the packet type 0478 150 The method of claim 138 wherein the session ID identifies a destination entity US 2008 0198787 Al 0479 151 The method of claim 150 wherein the pipe number identifies a connection to the destination entity 0480 152 The method of claim 138 wherein the packet length indicates the size in bytes of the packet data 0481 153 The method of claim 138 wherein the UDP type is a field indicating a value selectable from UDP Seg ment UDP ACK UDP NAK and UDP Probe 0482 154 The method of claim 138 wherein the packet ID is a field identifying the TXU packet to which the UDP segment is designated 0483 155 The method of claim 138 wherein the segment number is a field indicating a sequential ordering of the UDP segment within the TXU packet 0484 156 The method of claim 138 wherein the last segment
26. resources are available at the first computing device performing the first task US 2008 0198787 Al upon determination that the second task is required determining whether second resources are available at the first computing device upon determination that the second resources are not available at the first computing device determining whether the second resources are available at a second computing device upon determination that the second resources are avail able at the second computing device transporting the agent to the second computing device the transport ing comprising transmitting the agent through a selectable communi cation medium to the second computing device the transmitting comprising constructing a frame for agent data wherein the agent data includes the first executable code for the first task and the second executable code for the second task dividing the frame into a plurality of TXU packets that collectively comprise a frame body dividing a TXU packet from the plurality of TXU packets into a plurality of UDP segments grouping the plurality of UDP segments into at least one window for transmission through the selectable communication medium wherein the at least one window includes a predetermined number of UDP segments from the plurality of UDP segments and sending the at least one window to the second com puting device at the second computing device receiving the agent data through the selectabl
27. retransmit window having a number of UDP segments corresponding to a count of missing UDP segments and sending the retransmit window to the server and at the server upon determination that a final TXU packet for the frame has been received recreating the frame by reassembling the plurality of TXU packets 2 A method for data communication between a first com puting device and a second computing device comprising steps of at the first computing device transmitting data through a selectable communication medium to the second computing device the transmit ting comprising constructing a frame for the data dividing the frame into a plurality of TXU packets dividing each TXU packet into a plurality of UDP seg ments grouping the plurality of UDP segments into at least one window wherein the at least one window includes a predetermined number of UDP segments from the plurality of UDP segments and sending the at least one window to the second computing device at the second computing device receiving the data through the selectable communication medium from the first computing device the receiving comprising US 2008 0198787 Al 33 receiving a UDP segment from the plurality of UDP segments assembling the plurality of UDP segments to recreate a TXU packet upon determination that a last UDP segment from the plurality of UDP segments for the TXU packet that has been received sending an ACK message to the firs
28. segment is delayed Round trip time variations may also be caused by handover or competing traffic Queuing in routers base stations and other interme diate nodes may also lead to a long round trip time A long round trip time may cause low throughput and underutiliza tion of the network since it takes a number of round trip times before the congestion window reaches the capacity of the network TCP performance is degraded especially for short lived flows which transmits a small amount of data 0011 Therefore it is apparent that a heretofore unad dressed need exists in the art to address the aforementioned deficiencies and inadequacies SUMMARY 0012 The present invention provides systems and meth ods for mobile data object communications between multiple computing devices over a selectable communication medium 0013 One embodiment provides a method for data com munication between a remote electronic device and a server comprising transmitting data through a selectable communi cation medium to the server constructing a frame for data the frame comprising a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corre sponding to the data length dividing the frame into TXU packets that collectively comprise the frame body wherein a TXU packet comprises a packet header and a packet body the packet header including a packet type
29. system More particularly the present inven tion relates to a mobile data object communication system with at least a portion of the communication typically con ducted over wireless communication networks BACKGROUND 0003 Wireless networks such as GPRS General Packet Radio Service CDMA Code Division Multiple Access GSM Global System for Mobile communications and other similar wireless networks are becoming more widely deployed and are increasingly more often used to access services on the Internet Traditionally Transmission Control Protocol TCP is widely used in communications over wire less networks TCP technology has been very successful pro viding services to users of fixed wired networks For wireless networks TCP performance is reportedly much lower than for fixed networks TCP was designed for networks with wired links and stationary hosts In these wired networks data is lost primarily due to congestion TCP typically interprets data loss as congestion in the network and for data loss TCP slows the transmission rate in an attempt to reduce the con gestion In a wireless network one can not assume that data losses are caused by congestion Instead data loss is more often caused by the relative low quality of the wireless link Terminal mobility which is supported by many wireless net works may also result in data loss If data is lost for some reason other than congestion then performance is unneces sarily
30. that the second resources are not available at the first computing device determining whether the second resources are available at a second computing device upon determination that the second resources are available at the second computing device transporting the agent to the second computing device comprising transmit US 2008 0198787 Al ting the agent through a selectable communication medium to the second computing device comprising constructing a frame for agent data wherein the agent data includes the first executable code for the first task and the second executable code for the second task dividing the frame into TXU packets that collectively comprise a frame body dividing a TXU packet into UDP segments grouping the UDP segments into at least one window for transmission through the selectable communication medium wherein the window includes a pre determined number of UDP segments and sending the win dow to the second computing device at the second computing device receiving the agent data through the selectable com munication medium from the first computing device com prising receiving UDP segments assembling the UDP seg ments to recreate the TXU packet upon determination that a UDP segment corresponds to a window first segment prior to a final window first segment for the TXU packet sending an ACK to the first computing device upon determination that at least one UDP segment was not received sending a NAK mes
31. the receiver processes the received windows one UDP segment 128 at atime At step 414 the TXU packets 126 are recreated by reassembling the UDP segments 128 Finally at step 416 once all the TXU packets 126 are received the frame 124 is recreated 0130 FIG 5A is a detailed flowchart 500 of the TXP2 algorithm for sending data over a wireless communication or other network Data is transmitted from one computing device such as a remote electronic device 102 or handheld computer to another computing device such as a server or another handheld computer for example through a selectable communication medium At step 502 the data is constructed into a frame 124 for the agent data for example at the first computing device Next at step 502 the frame 124 is divided into TXU packets 126 Each TXU packet 126 is divided into a plurality of UDP segments 128 at step 506 Before sending the UDP segments 128 to the receiving computing device the UDP segments 128 are grouped into a plurality of windows at step 508 Each window contains a predetermined number of UDP segments 128 and the predetermined number of UDP segments 128 is determined according to the selectable com munication medium At step 510 a window is sent to the receiving computing device one UDP segment 128 at a time The window being sent could be the first window ofthe TXU packet 128 but of course could also be the next available window until all the windows for a TXU packet 12
32. the TXU packet that has been received sending an ACK message to the first computing device and upon determination that at least one UDP seg ment was not received sending a NAK message that speci fies each missing segment to the first computing device at the first computing device upon receiving the ACK message if a next window remains to be sent sending the next window from the first computing device to the second computing device at the first computing device upon receiving a NAK message retransmitting at least one missing UDP segment to the second computing device and at the second computing device upon determination that a final TXU packet for the frame has been received recreating the frame by reassem bling the TXU packets 0015 Another embodiment provide a method for data communication between a remote electronic device and a server comprising transmitting data from the remote elec tronic device through a selectable communication medium to the server comprising constructing a frame for data com prising a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corresponding to the data length dividing the frame into TXU packets that collec tively comprise the frame body wherein a TXU packet com prises a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet le
33. the UDP type is a one byte field indicating a value selectable from UDP Segment UDP ACK UDP NAK and UDP Probe 0550 200 The method of claim 187 wherein the packet ID is atwo byte field identifying the TXU packet to which the UDP segment is designated 0551 201 The method of claim 187 wherein the segment number is a one byte field indicating a sequential ordering of the UDP segment within the TXU packet 0552 202 The method of claim 187 wherein the last segment is a one byte field indicating the segment number corresponding to a final segment in the TXU packet 0553 203 The method of claim 187 wherein the UDP body comprises UDP segment data to be transmitted 0554 204 The method of claim 187 further comprising the step of 0555 upon sending a NAK to the remote electronic device waiting a predetermined probe time without receiving the UDP segment before sending a probe mes sage to the remote electronic device 0556 205 The method of claim 204 wherein the probe message is a type of the UDP segment 0557 206 The method of claim 205 wherein the probe message includes the segment number for the UDP segment most recently received US 2008 0198787 Al 0558 207 The method of claim 204 wherein a predeter mined probe retry count denotes a count of probe messages to send to the remote electronic device without receiving the UDP segment before reporting an error 0559 208 A method for receiving data from
34. the selectable commu nication medium is a wireless network 5 The method of claim 4 wherein the selectable commu nication medium includes one or more of a Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 6 The method of claim 5 further comprising the step of switching to a different selectable communication media during transmission of the data 7 The method of claim 3 wherein the predetermined num ber of UDP segments for the at least one window is an opti mized value corresponding to the selectable communication medium 8 The method of claim 3 wherein the packet length is a predetermined value corresponding to the selectable commu nication medium 9 The method of claim 3 wherein a UDP segment length indicates the size of the UDP segment the UDP segment length having a value corresponding to the selectable com munication medium 10 The method of claim 3 wherein a window length equals the predetermined number of UDP segments the win dow length having a value corresponding to the selectable communication medium 11 The method of claim 3 further comprising the step of at the remote electronic device waiting a predetermined probe time without receiving an ACK or a NAK before sending a probe message to the server 12 The method of claim 11 wherein the probe message inclu
35. various communication media that may be selected by TXP2 for communications The configuration file includes the following TXP2 protocol parameters 1 packet length 2 segment length 3 window length 4 probe time 5 probe retry and 6 receive timeout The parameters are either set by the application or TXP2 automatically determines the values based on the wireless network type bandwidth latency and error rates 0188 The packet length 228 indicates the size of the TXU packet 126 The TXM 608 subdivides the frame 124 into multiple TXU packets 126 having size equal to the packet length 0189 The segment length 248 indicates the size of the UDP segment 128 The TXU 610 subdivides each TXU packet 126 into multiple UDP segments 128 having size equal to the segment length 0190 The window length indicates the number of UDP segments 128 that the TXU 610 sends before an ACK 302 is required An ACK 302 is sent after the first UDP segment 128 of each window excepting the last window An ACK 302 is sent after the final segment of the last window is received so long as all UDP segments 128 for the TXU packet 126 have been received 0191 The probe time discussed in greater detail below indicates the time in seconds that the TXU 610 waits for an ACK 302 before probing the receiver 0192 The probe retry indicates the maximum number of probe retries performed by the TXU 610 before returning an error to the TXM 608 0193 The r
36. wherein the agent list identifies the agents 0771 326 The method of claim 318 wherein the frame list includes a list of frames to be sent or received 0772 327 The method of claim 318 wherein the error code is the error code occurring most recently during trans port of the agent 0773 328 The method of claim 318 wherein the error message is the error message occurring most recently during transport of the agent 0774 Aspect 6 Virtual Session Methods and Systems for transporting and executing agents to perform tasks at separate computing devices 0775 329 A method for transporting and executing agents having a plurality of related tasks that enables agents to perform tasks at separate computing devices comprising steps of 0776 at a first computing device receiving an agent into a first module space corresponding to the agent wherein the first module space comprises space infor mation for transport and execution of the agent 0777 upon determination that a task is required deter mining whether task resources are available at the first computing device 0778 upon determination that the task resources are unavailable at the first computing device transporting the agent to a second computing device the transporting comprising 0779 allocating a session between the first module space on the first computing device and a second module space on the second computing device 0780 opening a pipe through th
37. 0 258 The method of claim 257 further comprising 0651 upon determination that a final TXU packet for the frame has been assembled recreating the frame for the agent data by reassembling the plurality of TXU packets 0652 wherein the recreating occurs prior to the per forming 0653 259 The method of claim 255 wherein the prede termined number of UDP segments for the at least one win dow is an optimized value corresponding to the selectable communication medium 0654 260 The method of claim 255 wherein a UDP segment length indicates a UDP segment size for a UDP segment from the plurality of UDP segments the UDP seg ment size having a value corresponding to the selectable communication medium 0655 261 The method of claim 255 wherein a window length equals the predetermined number of UDP segments from the plurality of UDP segments the window length hav ing a value corresponding to the selectable communication medium 0656 262 The method of claim 255 wherein the frame comprises a frame header and the frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corre sponding to the data length 0657 263 The method of claim 262 wherein the agent name contains a name ofan object that includes the agent data and executable code 0658 264 The method of claim 262 wherein the data length indicates a size in bytes of the data buffer 065
38. 02 before reporting an error to the TXU 610 0200 FIG 9 illustrates a mobile data object transmission system 900 that uses the TXP2 communications protocol for multiple devices The TXP2 object communications protocol allows for communications between multiple computing devices The virtual space 604 for a particular agent 120 is replicated at each computing device where that agent 120 operates Additionally a virtual session 116 provides a chan nel ofcommunication between a computing device such as a mobile device 102a and each of the computing devices to which the agent 120 transports A pipe 118 provides full duplex connectivity between the computing devices 0201 In one embodiment an application C at mobile device 102a requires connectivity with application C at server 134 The TXP2 protocol 602a creates a virtual space 604c at mobile device 102a and TXP2 protocol 602c creates a corre sponding virtual space 604c at server 134 For communica US 2008 0198787 Al tions between Applications C at mobile device 102a and server 134 the agent 120c may then transport from mobile device 102a to the server 134 using pipe 118c that is allocated through the virtual session 116 0202 Similarly another application A at mobile device 102a also requires connectivity with application A at mobile device 1025 The TXP2 protocol 602a creates a virtual space 604a at mobile device 102a and TXP2 protocol 6025 creates a corresponding virtual space
39. 114 exist in both the mobile device 102 and the server 134 a lack of connection to the server typically does not hinder the end user application performance For example if customer 130 needs to get information regarding an appliance service tag from server 148 customer 130 tries to use the mobile device 104 to try to establish a connection with server 148 The TXP2 protocol tries to open a pipe 118 to send agent 122 from the mobile device 104 to the server 148 If mobile device 104 is unable to communicate with server 148 the agent 122 tries to run the server intensive code 102 in the mobile device itself and tries to return the needed data 0087 The TXP2 protocol has the capability for selecting between available communication media and typically is used for selecting and or switching among available wireless networks It should be noted however that the TXP2 protocol may also utilize more traditional wired networks and connec tions TXP2 Example 0088 To better illustrate the functionality and benefits of the TXP2 protocol an illustration is provided An agent 120 typically provides functionality for a handheld or mobile device 102 A field service technician 130 uses the mobile device 102 to acquire information related to a customer prod uct from a server 134 to provide updated customer informa tion as a result of a field service order to acquire service history information and to receive new scheduling assign ments for ex
40. 3 184 The method of claim 161 further comprising the step of 0524 at the first computing device waiting a predeter mined probe time without receiving an ACK or a NAK prior to sending at least one probe message to the second computing device 0525 185 The method of claim 184 wherein the at least one probe message includes a segment number of a recent UDP segment for which the ACK was received 0526 186 The method of claim 184 wherein a predeter mined probe retry count denotes a count of the at least one probe message to send to the second computing device with out receiving the ACK or the NAK before reporting an error 0527 Aspect 3 Receive Methods and Systems for receiving data at multiple computing devices from multiple computing devices 0528 187 A method for receiving data from a remote electronic device through a selectable communication medium comprising steps of 0529 receiving a plurality of UDP segments wherein a UDP segment from the plurality of UDP segments com prises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data pay load of predetermined size 0530 upon determination that the segment number indicates a first UDP segment creating a TXU packet the TXU packet comprising a packet header and a packet body the packet header including a packet type asession ID a pipe number and a packet length
41. 6 is the last packet of the frame 124 the TXM attempts to create the agent 120 using the information from the virtual space 604 0147 The TXP2 dual protocol provides several advan tages over traditional single protocol transmission methods The TXP2 dual protocol is simpler to implement and maintain two simple protocols than a single complex protocol Each of the two protocols can be changed without impacting the other protocol A TXM 608 module is easily implemented US 2008 0198787 Al using only one thread while TXU 610 modules are typically implemented using two threads thus TXP2 requires only three threads to support an unlimited number of virtual ses sions 116 Agents 0148 Mobile agents 120 are data communication objects containing both data and executable code necessary for per forming specific tasks on a computer or other computerized device Agents utilize the TXP2 protocol to travel from one computer to another Agents 120 contain both data and logic necessary for performing a task on a computer or other elec tronic device Further agents 120 can perform tasks at the receiving computer or electronic device with complete inde pendence from the sending device 0149 The agent 120 may perform a number of related tasks portions of which are executed at different locations For example a mobile device 102 in use by a field service technician 130 may require both a customer history and a product schematic diagram If
42. 8 are sent to the receiving computing device Aug 21 2008 0131 At some point after sending the first UDP segment 128 ofa window the sending computing device will typically receive an ACK 302 or NAK 308 message from the receiving computing device at step 512 At step 514 a determination is made whether the received message is an ACK 302 An ACK 302 indicates that the receiving computing device has received the first UDP segment 128 of a window unless the window is the final window ofa TXU packet 126 Forthe final window of a TXU packet 126 an ACK 302 is only received from the receiving computing device once all UDP segments 128 for the TXU packet have been received Upon receiving an ACK 302 corresponding to the first UDP segment 128 ofa window the sending computing device may begin sending the next available window Thus if an ACK 302 message is received a determination is made whether there are any more windows to send at step 524 If more windows remain to be sent the process returns to step 510 and continues sending the UDP segments 128 for the next available window If no win dows remain to be sent then the ACK 302 indicates that all UDP segments 128 for the TXU packet 126 have been suc cessfully received at the second computing device and that the sending of windows is at an end Of course the process will begin again for the next TXU packet 126 0132 Ifthe received message is not an ACK 302 then a determination is mad
43. 9 265 The method of claim 262 wherein the data buffer is a variable size buffer containing the agent data to be transmitted 0660 266 The method of claim 255 wherein the TXU packet comprises a packet header and a packet body the Aug 21 2008 packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length 0661 267 The method of claim 266 wherein the packet type indicates a value for the packet type 0662 268 The method of claim 266 wherein the session ID identifies a destination entity 0663 269 The method of claim 268 wherein the pipe number identifies a connection to the destination entity 0664 270 The method of claim 266 wherein the packet length indicates a size in bytes of the packet data 0665 271 The method of claim 266 wherein the packet length is a predetermined value corresponding to the select able communication medium 0666 272 The method of claim 255 wherein a UDP segment from the plurality of UDP segments comprises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data payload of predetermined size 0667 273 The method of claim 272 wherein the UDP type indicates a value selectable from UDP Segment UDP ACK UDP NAK and UDP Probe 0668 274 The method of claim 272 wherein the packet ID id
44. In this scenario UDP segments s1 s8 of window W1 are received by the server 134 Upon receiving the first segment s1 of window W1 an ACK 302 is sent to the mobile device 102 so that the next window W2 can be sent 0112 Upon receiving the ACK 302 the mobile device 102 begins sending window W2 including the next group of UDP segments 128 numbered s9 s16 to the server 134 Upon receiving the first segment s9 of window W2 an ACK 302 is sent to the mobile device 102 so that the next window W3 can be sent 0113 Upon receiving the last segment s24 of window W3 an ACK 302 is sent to the sender if all UDP segments for TXU packet 126a have been received TXP2 determines that the final UDP segment 128 has been received by matching the segment number 246 of the UDP segment 128 with the last segment 248 value Upon determining that the last segment 248 has been received a determination is made whether all segments for the TXU packet 126 have been received If all segments for the TXU packet 126 have been received then an ACK 302 is sent 0114 It should be noted that an ACK 302 is not sent after receiving the first segment s17 ofthe final window W3 ofa TXU packet 126 Rather a final ACK 302 is sent for the last window after receiving the last segment 248 s24 in this instance Receipt of the final ACK 302 confirms that the first window of the next TXU packet 126 can be sent 0115 Scenario 2 0116 Inscenario 2 TXU Packet 1265 is div
45. US 20080198787A1 a2 Patent Application Publication o Pub No US 2008 0198787 A1 as United States NGUYEN 43 Pub Date Aug 21 2008 54 MOBILE DATA OBJECT TRANSMISSION OVER WIRELESS COMMUNICATION NETWORKS USING UDP AND TWO LEVEL PROTOCOL 75 Inventor Van NGUYEN Alpharetta GA US Correspondence Address MORRIS MANNING MARTIN LLP 3343 PEACHTREE ROAD NE 1600 ATLANTA FINANCIAL CENTER ATLANTA GA 30326 73 Assignee AGENTEK INC Alpharetta GA US 21 Appl No 11 931 799 22 Filed Oct 31 2007 Related U S Application Data 60 Provisional application No 60 890 109 filed on Feb Intensive Intensive Publication Classification 51 Int Cl HO4B 7 14 2006 01 A A A Aa 370 315 57 ABSTRACT Systems and methods for data communication between mul tiple computing devices comprising transmitting data through a selectable communication medium by constructing a frame for data dividing the frame into TXU packets divid ing each TXU packet into UDP segments grouping the UDP segments into windows and sending each window to a sec ond computing device receiving the data at the second com puting device comprising receiving UDP segments assem bling UDP segments to recreate TXU packets sending an ACK message for the first UDP segment of each non final window and for the last UDP segment of a TXU packet of a final window to the first computing device and sending a NAK message specif
46. XP2 frame 124 TXU packets 126a 1265 126c and UDP segments s1 s24 128 using a sliding window algorithm as a method of flow control for network data transfers For purposes of illustration the example dis cusses sending data from a mobile device 102 to a server 134 though it should be apparent that data could just as easily be sent from one mobile device 102 to another from a server 134 to a mobile device 102 from a server 134a to a server 1345 or any other combination of electronic devices In order to transmit data TXP2 encapsulates the data into a frame 124 The frame 124 is divided into TXU packets 126a 1265 and 126c Each TXU packet 126 is divided into UDP segments 128 s1 s24 in this instance 0105 TXP2 parameters for packet length segment length window length probe time probe retry and receive timeout among others are included in a TXP2 configuration file Probe time and probe retry are discussed in further detail in the probe section that follows below The TXP2 configuration parameters are optimized according to the selected commu nications medium Additionally it should be noted that the selected communication medium can be changed transpar ently to the electronic devices exchanging data Part of a frame 124 can be transported using a first medium and the remainder of the frame 124 can be transported using a differ ent medium Upon determining that the selected communi US 2008 0198787 Al cation medium is changi
47. a frame header 202 and a frame body 210 The frame header 202 identifies the type of data being transmitted The frame body 210 contains the information about the agent 120 which includes the data logic and or executable code 0098 A frame header 202 is 45 bytes and includes an agent type 204 an agent name 206 and a data length 208 The agent type 204 is one byte and identifies whether the agent is real time batch or auto Ifthe agent type 204 is real time then the agent is meant for real time mode An agent type 204 batch allows for sending the agent in batch mode An agent type 204 auto indicates that the agent should be sent in real time but allows for the agent 120 to be saved to a local database and sent at a later time due to network errors Agent name 206 is 40 bytes and contains the name of the agent 120 Data len 208 Aug 21 2008 is four bytes and contains the length of the data buffer The frame body 210 contains the data buffer 212 and contains the actual agent 120 and any data to be sent 0099 Once the frame 124 is constructed the TXU dis cussed in detail below divides the frame 124 into TXU pack ets 126 The TXU packet size is a function of the selected communication medium For example a 500 byte packet size is recommended for satellite communications while a 10 k byte packet size is recommended for GPRS A packet ID is assigned to each packet 0100 A TXU packet 126 includes a packet header 220 and a packet
48. aiting a predetermined probe time without Aug 21 2008 receiving a UDP segment prior to sending at least one probe message to the first computing device 0617 248 The method of claim 247 wherein the at least one probe message includes a segment number for the UDP segment most recently received 0618 249 The method of claim 247 wherein a predeter mined probe retry count denotes a count of the at least one probe message to send to the first computing device without receiving the UDP segment before reporting an error 0619 Aspect 4 Agent Methods and Systems for trans porting agents to perform tasks among multiple computing devices 0620 250 A method for transporting agents having a plu rality of related tasks that enables agents to perform tasks at separate computing devices comprising steps of 0621 ata first computing device having an agent with a first executable code for a first task and a second executable code for a second task 0622 determining whether first resources are avail able at the first computing device 0623 upon verifying that first resources are available atthe first computing device performing the first task 0624 upon determination that the second task is required determining whether second resources are available at the first computing device 0625 upon determination that the second resources are not available at the first computing device deter mining whether the second r
49. alent arrangements and methodologies will be apparent from or reasonably suggested by the present invention and the fore going description thereof without departing from the sub stance or scope of the present invention Furthermore any sequence s and or temporal order of steps of various pro cesses described and claimed herein are those considered to be the best mode contemplated for carrying out the present invention It should also be understood that although steps of various processes may be shown and described as being in a preferred sequence or temporal order the steps of any such processes are not limited to being carried out in any particular sequence or order absent a specific indication of such to achieve a particular intended result In most cases the steps of such processes may be carried out in a variety of different sequences and orders while still falling within the scope of the present inventions In addition some steps may be carried out simultaneously Accordingly while the present invention has been described herein in detail in relation to preferred embodiments it is to be understood that this disclosure is only illustrative and exemplary of the present invention and is made merely for purposes of providing a full and enabling disclosure of the invention The foregoing disclosure is not intended nor is to be construed to limit the present invention or otherwise to exclude any such other embodiments adap tations var
50. ample 0089 From a home office location the field service tech nician 130 typically acquires the scheduling information for that day s service calls via a Wi Fi 104 communication medium such as an 802 11 wireless network within the office TXP2 selects the Wi Fi 104 communication medium as a first priority in this instance since it is readily available and has low cost As much ofthe customary information as necessary is easily downloaded into the mobile device 102 in a timely and cost effective manner 0090 The TXP2 protocol on the mobile device receives the agent 120 into a virtual space 604 The agent 120 is placed in a frame 124 format and deconstructed into TXU packets 126 The TXU packets 126 are then divided into UDP seg Aug 21 2008 ments 128 Meanwhile the TXP2 protocol at the mobile device 102 opens a virtual session 116 to the server 134 and allocates a pipe 118 through the virtual session 116 to the virtual space 604 at the server 134 The UDP segments 128 are then transmitted to the server 134 where the deconstruc tion process is reversed and the agent 120 is reconstructed and placed into the virtual space 604 at the server 134 The virtual space 604 at the server 134 is identical to the virtual space 604 at the mobile device 102 0091 The agent 120 has thus transported itself to the server 134 where it acquires the day s schedule information from the database 136 by executing its server intensive code 114 The age
51. and the packet body including packet data corresponding to the packet length 0531 upon determination that the segment number indicates the UDP segment sequentially after the first UDP segment adding the UDP segment to the TXU packet 0532 upon determination that the segment number indicates an initial segment in a window prior to a final window initial segment for the TXU packet sending an ACK to the remote electronic device 0533 upon determination that the UDP segment was not received sending a NAK message to the remote electronic device the NAK message specifying the seg ment number for each missing segment 0534 upon determination that the segment number indicates the last segment verifying that all UDP seg ments have been received 0535 upon determination that all UDP segments have been received sending an ACK message to the remote electronic device 0536 upon determination that a final TXU packet has been received recreating a frame by reassembling a Aug 21 2008 plurality of TXU packets the frame comprising a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer for data and corre sponding to the data length 0537 188 The method of claim 187 wherein the select able communication medium is a wireless network 0538 189 The method of claim 188 wherein the select able communication medium includes one o
52. ansactions 0038 Frame A linear block of data that contains a frame header and a frame body The frame header contains the information which identifies the frame type The frame body contains the information about the agent which is its data and logic 0039 LAN Local area network a collection of comput ers that are connected for electronic communications typi cally located geographically close together that is in the same building 0040 Mobile device Any device used for communication over a wireless communication networks such as a handheld device a cellular phone a walkie talkie a personal digital assistant PDA a pager a smart phone or any combination thereof Mobile devices operative in the present invention typically run a software program to effect the functionality described herein Generally synonymous and used inter changeably with mobile phone but a mobile device need not necessarily be a telephone type instrument 0041 Multilayer Transportation A process that combines certain aspects of the OSI Application Session and Transport layers for transmitting an agent from one computer or elec tronic device to another 0042 OCP Object Communication Protocol 0043 Packets A frame is subdivided into a plurality of TXU packets 0044 Protocol A set of formal rules describing how to transmit data especially across a network Low level proto cols define the electrical and physical standards to be ob
53. ask passes control to another agent to execute other desired functionality or waits until connectivity is available for example The determination whether to perform other functionality or wait is of course design and functionality dependent 0152 TXP2 sends and receives agents 120 over a select able communication medium including wired networks such as for example LAN and WAN and wireless networks such as Wi Fi GPRS CDMA GSM and satellite for example Objects written in any programming language can become an agent 120 by using the following exemplary callback func tions 1 OnGetAgentIype 2 OnGetAgentName 3 OnGetSendData Data Len Data Buffer 4 OnPutSend Data Data Len Data Buffer 5 OnArrived 6 OnGetRe turnData Data Len Data Buffer 7 OnPutReturnData Data Len Data Buffer and 8 OnReturned Of course those of skill in the art will readily note that many other callback functions could also be defined 0153 The OnGetAgentType function returns a byte denoting whether the agent is to be sent in 1 real time Aug 21 2008 2 batch or 3 auto A value of real time signifies that the agent 120 is intended to be sent in real time mode An appli cation on a sending computer sends an agent 120 to a second computer and the second computer may optionally return the agent 120 to the sending computer In either case the sending computer s application waits for completion of the transport proces
54. at least one window includes a predetermined number of UDP segments from the plurality of UDP segments and US 2008 0198787 Al 0317 sending the at least one window to the second computing device 0318 at the second computing device receiving the data through the selectable communication medium from the first computing device the receiving compris ing 0319 receiving a UDP segment from the plurality of UDP segments 0320 assembling the plurality of UDP segments to recreate a TXU packet 0321 upon determination that a last UDP segment from the plurality of UDP segments for the TXU packet that has been received sending an ACK mes sage to the first computing device and 0322 upon determination that at least one UDP seg ment from the plurality of UDP segments was not received sending a NAK message that specifies each missing segment to the first computing device 0323 at the first computing device upon receiving the ACK message if a next window from the at least one window remains to be sent sending the next window from the first computing device to the second computing device 0324 at the first computing device upon receiving a NAK message retransmitting at least one missing UDP segment from the plurality of UDP segments to the second computing device and 0325 at the second computing device upon determina tion that a final TXU packet for the frame has been received recreating the frame by reasse
55. aving a value corresponding to the selectable communication medium 0506 167 The method of claim 161 wherein a window length equals the predetermined number of UDP segments the window length having a value corresponding to the select able communication medium 0507 168 The method of claim 161 wherein the frame comprises a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corresponding to the data length 0508 169 The method of claim 168 wherein the agent typeisaone byte field indicating a value selectable from real time batch and auto 0509 170 The method of claim 168 wherein the agent name is a 40 byte field and contains a name of an object wherein the object includes the data and executable code 0510 171 The method of claim 168 wherein the data length is a 4 byte field indicating a size in bytes of the data buffer 0511 172 The method of claim 168 wherein the data buffer is a variable size buffer containing the data to be trans mitted 0512 173 The method of claim 161 wherein a TXU packet from the plurality of TXU packets comprises a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length 0513 174 The method of claim 173 wherein the packet type is a on
56. be sent sending the next TXU packet to the first TXU module 0367 the first TXU module operable for 0368 receiving the TXU packet from the first TXM module 0369 dividing the TXU packet into a plurality of UDP segments 0370 grouping the plurality of UDP segments into at least one window wherein the at least one win dow includes a predetermined number of UDP seg ments from the plurality of UDP segments and 0371 sending the at least one window through the selectable communication medium to a second TXU module at the second computing device 0372 upon receipt of an ACK message if a next window remains sending the next window to the second TXU module and 0373 uponthe receipt ofa NAK message wherein the NAK message specifies at least one missing UDP segment retransmitting the at least one miss ing UDP segment to the second TXU module 0374 the second computing device configured for com munication through the selectable communication medium with the first computing device the second computing device comprising 0375 0376 receiving a UDP segment of the at least one window through the selectable communication medium from the first TXU module the second TXU module operable for 0377 assembling the UDP segment to recreate the TXU packet 0378 upon determination that at least one differ ent UDP segment was not received sending the NAK message through the selectable communica tion medium to
57. bility After some retransmission attempts the link layer protocol gives up and leaves further error recovery to TCP Handover events may also lead to data loss A whole window of data may be lost due to handover Data loss due to an unreliable link layer or a handover may cause a timeout event followed by slow start or three dupacks followed by fast US 2008 0198787 Al retransmit and fast recovery In either case the congestion control action taken by TCP is unnecessary Directly after the loss event the radio quality may become high again and after handover data may be transmitted without problems to the new mobile station 0010 TCP may also misinterpret a sudden increase in the round trip time as data loss If the delay is long enough for the retransmission timer to expire before an acknowledgment is received then TCP misinterprets the delay as an indication of data loss due to congestion The delayed data is unnecessarily retransmitted and TCP enters slow start A highly variable round trip time can also lead to a large retransmission timeout value RTO since the RTO is based both on estimates of the round trip time and on variations in the round trip time If the RTO is large then TCP reacts slowly to data loss Variations in the round trip time can be caused by link level retransmis sions of a wireless link If the link layer frames that contain a TCP segment must be retransmitted because of a poor radio environment then the whole
58. body 230 Each packet header is 11 bytes and includes a packet type 222 a session ID 224 a pipe number 226 and a packet length 228 Each packet body 230 includes packet data 232 0101 The session ID 224 is a number generated by TXP2 using both the user ID and the device ID of the communicat ing electronic device This number uniquely identifies the virtual session that is associated with the virtual space See below for further discussion of the virtual session and the virtual space The session ID 224 is unique across TXP2 communication participants 0102 The TXU packets 126 are divided into UDP seg ments 128 A UDP segment 128 includes a UDP header 240 and a UDP body 250 Each UDP header 240 is five bytes and includes a UDP type 242 a packet ID 244 a segment number 246 and a last segment 248 Each UDP body 250 includes a segment 252 The size ofthe segments 252 varies according to the different types of UDP segments 128 probe ACK NAK and segment Only the segment type contains a UDP body 250 0103 The packet ID 244 identifies the TXU packet 126 to which the UDP segment 128 belongs Each UDP segment 128 is numbered in order and the segment number 246 iden tifies the UDP segment 128 The last segment 248 identifies the number of the last UDP segment 128 for a TXU packet 126 The segment 252 includes the actual segment of the data being sent 0104 FIG 3 is a diagram 300 illustrating three scenarios forthe transmission ofa T
59. cations between a mobile device 102 and a server 134 The pipe 118 is allo cated within a virtual session 116 discussed in greater detail below and is a full duplex communication channel between computers and or other electronic devices A pipe 118 typi cally connects two devices and provides communications using the TXP2 protocol to transmit UDP segments 128 over IP Anallocated pipe 118 is typically used for communication ofa single data entity or object and is terminated and released upon completion of the communication 0083 A data entity or object such as an agent 120 is transported from one device such as a mobile device 102 through a selected communication media to a server 134 The agent 120 is assembled into a frame 124 and the frame 123 is then deconstructed into TXU packets 126 TXU packets are divided into UDP segments 128 that are transferred through the pipe 118 within a virtual session 116 to the server 134 The frame 124 TXU packets 126 and the UDP segments 128 are discussed in further detail below 0084 The agent 120 can be viewed as software including both data and executable code and capable of performing a specific task on a computer or other electronic device The agent 120 essentially travels from one computer to another performs tasks or activities and acts as a means of inter process communication In the present invention agents 120 are sent using UDP and a two level protocol over wireless and wired netw
60. cuting agents having a plurality of related tasks that enables the agents to execute portions of related tasks at different computing devices comprising steps of 0737 at a first computing device 0738 receiving an agent into a first module space corresponding to the agent wherein the first module space comprises space information for transport and execution of the agent 0739 upon determination that a first task is required determining whether first resources are available 0740 upon verifying availability of first resources performing the first task 0741 upon determination that a second task is required determining whether second task resources are available at the first computing device Aug 21 2008 0742 upon determination that the second task resources are unavailable at the first computing device transporting the agent to a second computing device the transporting comprising 0743 at the first computing device transmitting the agent through a selectable communication medium to the second computing device the trans mitting comprising 0744 constructing a frame for agent data 0745 dividing the frame into a plurality of TXU packets that collectively comprise a frame body 0746 dividing each TXU packet into a plurality of UDP segments 0747 grouping the plurality of UDP segments into at least one window for transmitting through the selectable communication medium wherein the at least one wind
61. d executable code for a second task determining whether first resources are available at the first computing device upon verifying that first resources are available at the first computing device performing the first task upon determination that the second task is required determining whether second resources are available at the first computing device upon determination that the second resources are not available at the first computing device determining whether the second resources are available at a second computing device and upon determination that the second resources are avail able at the second computing device transporting the agent through a selectable communication medium to the second computing device and at the second computing device receiving the agent from the first computing device and performing the second task 27 The method of claim 26 wherein the selectable com munication medium is a wireless network 28 The method of claim 27 wherein the selectable com munication medium includes one or more ofa Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 29 The method of claim 28 further comprising switching to a different selectable communication medium during transmission of agent data 30 The method of claim 28 further comprising switching to a differe
62. d of claim 208 wherein the packet type indicates a value for the packet type 0576 216 The method of claim 208 wherein the session ID identifies a destination 0577 217 The method of claim 216 wherein the pipe number identifies a connection to the destination 0578 218 The method of claim 208 wherein the packet length indicates the size in bytes of the packet data 0579 219 The method of claim 208 wherein the UDP type is a field indicating a value selectable from UDP Seg ment UDP ACK UDP NAK and UDP Probe 0580 220 The method of claim 208 wherein the packet ID is a field identifying the TXU packet to which the UDP segment is designated 0581 221 The method of claim 208 wherein the segment number is a field indicating a sequential ordering of the UDP segment within the TXU packet 0582 222 The method of claim 208 wherein the last segment is a field indicating the segment number correspond ing to a final segment in the TXU packet 0583 223 The method of claim 208 wherein the UDP body comprises UDP segment data to be transmitted 0584 224 The method of claim 208 further comprising the step of 0585 upon sending a NAK to the first computing device waiting a predetermined probe time without receiving the UDP segment prior to sending at least one UDP segment probe message to the first computing device 0586 225 The method of claim 224 wherein the at least one UDP segment probe message includ
63. d of prede termined size 0214 grouping the plurality of UDP segments into at least one window for transmission through the select able communication medium wherein the at least one window includes a predetermined number of UDP segments from the plurality of UDP segments and 0215 sending the at least one window to the server 0216 atthe server receiving the data through the select ablecommunication medium from the remote electronic device the receiving comprising 0217 receiving at least one UDP segment 0218 assembling UDP segments to recreate the TXU packet 0219 upon determination that the segment number of the UDP segment indicates a window first segment prior to a final window first segment for the TXU packet sending an ACK to the remote electronic device 0220 upon determination that at least one UDP seg ment was not received sending a NAK message to the remote electronic device the NAK message specify ing the segment number for each missing segment and 0221 upon determination that a final UDP segment for the TXU packet has been received sending an ACK message to the remote electronic device 0222 at the remote electronic device upon receiving the ACK message from the server if a next window from the at least one window remains to be sent sending the next window from the remote electronic device to the server 0223 at the remote electronic device upon receipt of the NAK message 0224
64. d probe retry count denotes the number ofthe at least one UDP segment probe message to send to the second computing device without receiving the ACK or the NAK before report ing an error 0306 54 The method of claim 31 further comprising the step of 0307 at the second computing device upon sending a NAK to the first computing device waiting a predeter mined probe time without receiving the UDP segment prior to sending at least one UDP segment probe mes sage to the first computing device 0308 55 The method of claim 54 wherein the at least one UDP segment probe message includes the segment number for the UDP segment most recently received 0309 56 The method of claim 54 wherein a predeter mined probe retry count denotes a number of the at least one UDP segment probe message to send to the first computing device without receiving the UDP segment before reporting an error 0310 57 A method for data communication between a first computing device and a second computing device com prising steps of 0311 atthe first computing device 0312 transmitting data through a selectable communi cation medium to the second computing device the transmitting comprising 0313 constructing a frame for the data 0314 dividing the frame into a plurality of TXU packets 0315 dividing each TXU packet into a plurality of UDP segments 0316 grouping the plurality of UDP segments into at least one window wherein the
65. de Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 0759 316 The method of claim 315 further comprising 0760 switching to a different selectable communica tion media during transmission of the agent 0761 317 The method of claim 315 further comprising 0762 switching to a different selectable communica tion media during reception of the agent 0763 318 The method of claim 313 wherein the space information comprises a version ID a session ID a user ID a device ID an encryption key an IP address an IP port number a status an agent list a frame list an error code and an error message US 2008 0198787 Al 0764 319 The method of claim 318 wherein the user ID is provided by an application at the first computing device 0765 320 The method of claim 318 wherein the device ID is provided by an application at the first computing device 0766 321 The method of claim 318 wherein the session ID is generated from the user ID and the session ID 0767 322 The method of claim 318 wherein the encryp tion key is generated and exchanged using Diffie Hellman key exchange 0768 323 The method of claim 318 wherein the IP address contains a network address corresponding to the first computing device 0769 324 The method of claim 318 wherein the status includes status information about the first module space 0770 325 The method of claim 318
66. degraded as TCP reduces its transmission rate in response to the loss Therefore one reason for performance degradation is that TCP works less efficiently in wireless networks 0004 A wireless network comprises a plurality of mobile stations and a plurality of intermediate nodes The interme diate nodes are required to connect the wireless communica tion network to wired communication networks For example an inter working unit is used to connect a cellular telephony network to a wired network 0005 Wireless links are not as robust as wired links since the radio quality may vary considerably over time the band width is usually lower and transmission errors occur more frequently Sending signals over an omni directional radio based medium gives rise to more errors than in a guided medium such as fiber or coax Signal strength weakens with the distance between a mobile device and a mobile station Additionally radio waves bounce off objects causing inter ference and multi path effects Aug 21 2008 0006 Error correction interleaving and retransmissions are used at lower protocol layers to reduce transmission errors at the upper protocol layers In many wireless networks the data link layer performs error recovery according to some automatic repeat request ARQ protocol ARQ is an error control method for data transmission which makes use of acknowledgments and timeouts to achieve reliable data trans mission An acknowledgm
67. des the segment number of a recent UDP segment for which the ACK was received 13 The method of claim 11 wherein a predetermined probe retry count denotes a number of probe messages to send to the server without receiving the ACK or the NAK before reporting an error 14 A method for receiving data from a remote electronic device through a selectable communication medium com prising steps of receiving a plurality of UDP segments wherein a UDP segment from the plurality of UDP segments comprises a UDP header and a UDP body the UDP header includ ing a UDP type a packet ID a segment number a last segment and the UDP body including a data payload of predetermined size upon determination that the segment number indicates a first UDP segment creating a TXU packet the TXU packet comprising a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length upon determination that the segment number indicates the UDP segment sequentially after the first UDP segment adding the UDP segment to the TXU packet upon determination that the segment number indicates an initial segment in a window prior to a final window US 2008 0198787 Al initial segment for the TXU packet sending an ACK to the remote electronic device upon determination that the UDP segment was not received sending
68. e 0606 238 The method of claim 236 wherein the session ID is a 4 byte field identifying a destination 0607 239 The method of claim 238 wherein the pipe number is a 4 byte field identifying a connection to the des tination 0608 240 The method of claim 236 wherein the packet length is a 2 byte field indicating a size in bytes of the packet data 0609 241 The method of claim 236 wherein the packet length is a predetermined value corresponding to the select able communication medium 0610 242 The method of claim 227 wherein a UDP segment from the plurality of UDP segments comprises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data payload of predetermined size 0611 243 The method of claim 242 wherein the UDP type indicates a value selectable from UDP Segment UDP ACK UDP NAK and UDP Probe 0612 244 The method of claim 242 wherein the packet ID identifies the TXU packet to which the UDP segment is designated 0613 245 The method of claim 242 wherein the segment number indicates a sequential ordering of the UDP segment within the TXU packet 0614 246 The method of claim 242 wherein the last segment indicates the segment number corresponding to a final UDP segment in the TXU packet 0615 247 The method of claim 227 further comprising the step of 0616 upon sending a NAK to the first computing device w
69. e message to the second computing device 0410 110 The system of claim 109 wherein the probe message is a type of the UDP segment 0411 111 The system of claim 110 wherein the probe message includes a segment number for the UDP segment recently received 0412 112 The system of claim 109 wherein a predeter mined probe retry count denotes a count of probe messages to send to the first TXU module without receiving the UDP segment before reporting an error 0413 Aspect 2 Transmission Methods and Systems for transmitting data from multiple computing devices to mul tiple computing devices 0414 113 A method for data communication between a remote electronic device and a server comprising steps of 0415 transmitting data from the remote electronic device through a selectable communication medium to the server the transmitting comprising 0416 constructing a frame for data the frame com prising a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corresponding to the data length 0417 dividing the frame into a plurality of TXU packets that collectively comprise the frame body wherein a TXU packet from the plurality of TXU packets comprises a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data correspo
70. e all UDP segments 128 of a TXU packet 126 have been received and the corresponding ACK 302 is sent at step 556 a determination is made whether all UDP segments 128 for all TXU packets 126 have been received At step 558 the determination is made whether the received UDP segment 128 is the final UDP segment 128 of the final TXU packet 128 If so then the frame 124 is recreated from the received TXU packets 126 0137 Returning to step 546 ifthe received UDP segment 128 is not the last UDP segment 128 of a TXU packet 126 then processing continues at step 548 to determine whether any UDP segments 128 are missing were not received as expected UDP segments 128 from a window are transmitted sequentially from a sending computing device and are typi cally received sequentially at the receiving computing device The segment number 246 ofa received UDP segment 128 can be compared for example against the segment number 246 of the last received UDP segment 128 or against the segment number 246 of the last UDP segment 128 added to the created TXU packet 128 to determine whether the numbers are sequential and thus whether one or more UDP segments 128 have not been received 0138 Upon determination that one or more UDP seg ments 128 are missing at step 548 the missing UDP segment s 128 are identified at step 550 and then a NAK 308 is sent at step 552 from the receiving computing device to the send ing computing device The NAK 308 also
71. e at least one window includes a predetermined number of UDP segments from the plurality of UDP segments and 0497 sending the at least one window to the second computing device 0498 uponreceiving a NAK message retransmitting at least one missing UDP segment to the second com puting device and 0499 upon receiving an ACK message if a next win dow from the at least one window remains to be sent sending the next window from the first computing device to the second computing device 0500 162 The method of claim 161 wherein the select able communication medium is a wireless network 0501 163 The method of claim 162 wherein the select able communication medium includes one or more of a Wi Fi network a GPRS General Packet Radio Service network a Aug 21 2008 CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 0502 164 The method of claim 163 further comprising the step of 0503 switching to a different selectable communica tion media during transmission of the data 0504 165 The method of claim 161 wherein the prede termined number of UDP segments for the at least one win dow is an optimized value corresponding to the selectable communication medium 0505 166 The method of claim 161 wherein a UDP segment length indicates a UDP segment size for a UDP segment from the plurality of UDP segments the UDP seg ment size h
72. e at step 516 whether a NAK 308 was received A NAK 308 indicates that at least one UDP segment 128 was not received by the receiving computing device The NAK 308 also identifies the missing UDP segment 128 or segments At step 518 the sending computing device acquires the information for identifying the missing UDP segment 128 or segments The missing UDP segment s 128 are grouped into a retransmit window at step 520 and then the retransmit window is sent to the receiving computing device at step 522 After sending the retransmit window a determination is made at step 524 whether more windows remain to be sent 0133 FIG 5B is a detailed flowchart 530 of the TXP2 algorithm for receiving data over a wireless communication or other network Data is received from one computing device such as a remote electronic device 102 or handheld computer to another computing device such as a server 134 or another handheld computer for example through a select able communication medium A UDP segment 128 is received at step 532 Next a determination is made at step 534 whether the UDP segment 128 is the first UDP segment 128 ofa TXU packet 126 Fora first UDP segment 128 a new TXU packet 126 is created at step 536 and the UDP segment 128 is added to the TXU packet 126 at step 538 Of course if the received UDP segment 128 is not a first segment it is still added to the TXU packet 126 at step 538 0134 At step 540 a determination is made whe
73. e byte field indicating a value for the packet type 0514 175 The method of claim 173 wherein the session ID is a 4 byte field identifying a destination entity 0515 176 The method of claim 175 wherein the pipe number is a 4 byte field identifying a connection to the des tination entity 0516 177 The method of claim 173 wherein the packet length is a 2 byte field indicating a size in bytes of the packet data 0517 178 The method of claim 173 wherein the packet length is a predetermined value corresponding to the select able communication medium 0518 179 The method of claim 161 wherein a UDP segment from the plurality of UDP segments comprises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data payload of predetermined size US 2008 0198787 Al 0519 180 The method of claim 179 wherein the UDP type indicates a value selectable from UDP Segment UDP ACK UDP NAK and UDP Probe 0520 181 The method of claim 179 wherein the packet ID identifies a TXU packet from the plurality of TXU pack ets to which the UDP segment is designated 0521 182 The method of claim 181 wherein the segment number indicates a sequential ordering of the UDP segment within the TXU packet 0522 183 The method of claim 181 wherein the last segment indicates the segment number corresponding to a final segment in the TXU packet 052
74. e communication medium from the first computing device the receiving comprising receiving UDP segments from among the plurality of UDP segments assembling the UDP segments to recreate the TXU packet upon determination that a UDP segment from received UDP segments corresponds to a window first segment prior to a final window first segment for the TXU packet sending an ACK to the first computing device upon determination that at least one UDP segment from the UDP segments was not received sending a NAK message to the first computing device the NAK mes sage specifying a segment number for each missing UDP segment and upon determination that a final UDP segment from the UDP segments for the TXU packet has been received sending an ACK message to the first computing device at the first computing device upon receiving the NAK message retransmitting at least one missing UDP seg ment to the second computing device and at the second computing device upon determination that a final TXU packet for the frame has been assembled recreating the frame for the agent data by reassembling the plurality of TXU packets and performing the second task 45 The method of claim 44 further comprising the step of at the first computing device waiting a predetermined probe time without receiving the ACK or a NAK prior to sending at least one probe message to the second com puting device Aug 21 2008 46 The method of claim 45 wherein the at l
75. e corresponding to the selectable com munication medium 0236 7 The method of claim 1 wherein the packet length is a predetermined value corresponding to the selectable com munication medium 0237 8 The method of claim 1 wherein a UDP segment length indicates a UDP segment size for the UDP segment the UDP segment size corresponding to the selectable com munication medium 0238 9 The method of claim 1 wherein a window length is equal to the predetermined number of UDP segments the window length having a value corresponding to the selectable communication medium 0239 10 The method of claim 1 wherein the agent type is a one byte field indicating a value selectable from realtime batch and auto 0240 11 The method of claim 1 wherein the agent name is a 40 byte field and contains a name of an object wherein the object includes the data and executable code 0241 12 The method of claim 1 wherein the data length is a 4 byte field indicating the size in bytes of the data buffer 0242 13 The method of claim 1 wherein the data buffer is a variable size buffer containing the data to be transmitted 0243 14 The method of claim 1 wherein the packet type is a one byte field indicating a value for the packet type 0244 15 The method ofclaim 1 wherein the session ID is a 4 byte field identifying a destination entity 0245 16 The method of claim 15 wherein the pipe num ber is a 4 byte field identifying a connection t
76. e session the pipe having full duplex capability and 0781 transmitting the agent through the pipe to the second module space wherein the agent is transmit ted by the first module space through a selectable communication medium to the second module space 0782 at the second computing device 0783 receiving the agent into the second module space and 0784 executing the task 0785 330 The method of claim 329 wherein the select able communication medium is a wireless network 0786 331 The method of claim 330 wherein the select able communication medium includes one or more ofa Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network Aug 21 2008 0787 332 The method of claim 331 further comprising 0788 switching to a different selectable communica tion medium during transmission of the agent 0789 333 The method of claim 331 further comprising 0790 switching to a different selectable communica tion medium during reception of the agent 0791 334 A method for transporting and executing agents having a plurality of related tasks that enables agents to perform tasks at separate computing devices comprising steps of 0792 ata first computing device 0793 receiving an agent into a first module space corresponding to the agent wherein the first module space comprise
77. east one probe message includes the segment number of a recent UDP seg ment for which the ACK was received 47 The method of claim 45 wherein a predetermined probe retry count denotes a count of the at least one probe message to send to the second computing device without receiving the ACK or the NAK before reporting an error 48 The method of claim 44 further comprising the step of at the second computing device upon sending a NAK to the first computing device waiting a predetermined probe time without receiving the UDP segment prior to sending at least one probe message to the first computing device 49 The method of claim 48 wherein the at least one probe message includes the segment number for the UDP segment most recently received 50 The method of claim 48 wherein a predetermined probe retry count denotes a count of the at least one probe message to send to the first computing device without receiv ing the UDP segment before reporting an error 51 A method for transporting and executing agents having a plurality of related tasks that enables the agents to execute portions of related tasks at different computing devices com prising steps of at a first computing device receiving an agent into a first module space correspond ing to the agent wherein the first module space com prises space information for transport and execution of the agent upon determination that a first task is required deter mining whet
78. eceive timeout indicates the time in seconds that the TXU 610 waits for the next UDP segment 128 0194 FIG 7 is an illustration of the difference 700 between the Open Systems Interconnection Basic Reference Model OSI Reference Model or OSI Model 702 and TXP2 communications protocol 704 The OSI model 702 is a seven layered abstract description for communications and com puter network protocol design The OS layers are application 706 presentation 708 session 710 transport 712 network 714 data link 716 and physical layer 718 Both TCP IP and TXP2 704 use only 4 of the OSI layers application 720 transport 722 Internet 724 and network access 726 The application layer in TCP IP and TXP2 724 handles responsi bilities comparable to the presentation 708 and session 710 layer in the OSI model 702 Probe 0195 FIG 8 illustrates probe functionality 800 for mobile data object transmission using the TXP2 object communica tion protocol A second frame 124 is only sent after the first frame is complete Upon not receiving a final ACK 302 probe functionality allows the sending computer to inquire as to whether all UDP segments 128 were received Probe mes sages 802 may be sent for example from a mobile device 102 to a server 134 if it appears that UDP segments 128 ACKs 302 or NAKs 308 are not being received Of course the server 134 may also send probe messages 802 to the mobile device 102 for the same reason 0196 A configuratio
79. eceived sending an ACK message to the first computing device 0567 upon determination that a final TXU packet has been received recreating a frame by reassembling a plurality of XU packets the frame comprising a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corresponding to the data length 0568 209 The method of claim 208 wherein the wireless communication medium is a selectable communication medium that includes one or more of a Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 0569 210 The method of claim 208 further comprising the step of 0570 switching to a different selectable wireless com munication media during reception of data 0571 211 The method of claim 208 wherein the agent type is a field indicating a value selectable from real time batch and auto 0572 212 The method of claim 208 wherein the agent name contains a name of an object wherein the object includes data and executable code 0573 213 The method of claim 208 wherein the data length indicates the size in bytes of the data buffer Aug 21 2008 0574 214 The method of claim 208 wherein the data buffer is a variable size buffer containing data to be transmit ted 0575 215 The metho
80. econstruct the agent into a frame for sending through the selected communication medium At the receiving computer TXP2 uses the virtual space to reconstruct the agent and provide it to the application for execution 0071 A virtual session is a communication context between virtual spaces of communicating computers across a selected communication medium The communication chan nel allows full duplex capability for mobile agents to travel between specified applications independent of underlying IP and port address changes of the communicating nodes Appli cations on computers or other electronic devices may send and receive agents over any IP based network simultaneously One virtual session allows an application to communicate to any TXP2 enabled computers whereas TCP IP communica tions require two sockets for each pair of communicating computers 0072 TXP2 is a mobile object communication protocol for overcoming the inherent limitations of networks and particularly wireless networks TXP2 uses the User Datagram Protocol UDP ina dual protocol method for its transmission of mobile object data TXP2 allows applications on a com puting device to communicate with applications on any num ber of other computing devices by sending and receiving agents over IP based networks simultaneously 0073 An agent is a communication data object that includes both data and executable code necessary for per forming a task on a computer Agent commun
81. ed sending a NAK mes sage to the first computing device the NAK message specifying a segment number for each missing UDP segment and upon determination that a final UDP segment from the UDP segments for the TXU packet has been received sending an ACK message to the first computing device 34 The method of claim 33 further comprising upon determination that a final TXU packet for the frame has been assembled recreating the frame for the agent data by reassembling the plurality of TXU packets wherein the recreating occurs prior to the performing 35 The method of claim 31 wherein the predetermined number of UDP segments for the at least one window is an optimized value corresponding to the selectable communica tion medium 36 The method of claim 31 wherein a UDP segment length indicates a UDP segment size for a UDP segment from the plurality of UDP segments the UDP segment size having a value corresponding to the selectable communication medium 37 The method of claim 31 wherein a window length equals the predetermined number of UDP segments from the plurality of UDP segments the window length having a value corresponding to the selectable communication medium 38 The method of claim 26 further comprising the step of at the first computing device waiting a predetermined probe time without receiving an ACK or a NAK prior to sending at least one probe message to the second com puting device 39 The method of claim
82. egments and sending the at least one window through the selectable communication medium to a second TXU module at the second computing device upon receipt of an ACK message if a next window remains sending the next window to the second TXU module and upon the receipt ofa NAK message wherein the NAK message specifies at least one missing UDP seg ment retransmitting the at least one missing UDP segment to the second TXU module the second computing device configured for communica tion through the selectable communication medium with the first computing device the second computing device comprising the second TXU module operable for receiving a UDP segment of the at least one window through the selectable communication medium from the first TXU module assembling the UDP segment to recreate the TXU packet upon determination that at least one different UDP segment was not received sending the NAK mes sage through the selectable communication medium to the first TXU module the NAK mes sage specifying the at least one missing UDP seg ment that corresponds to the at least one different UDP segment and upon determination that a final UDP segment for the TXU packet has been received sending the ACK message to the first TXU module sending the TXU packet to a second TXM module the second TXM module operable for receiving the TXU packet from the second TXU mod ule upon determination that the TXU packet is a first TXU pack
83. electable communication medium 0709 289 The method of claim 283 wherein a UDP segment length indicates a UDP segment size for the UDP segment the UDP segment size having a value corresponding to the selectable communication medium 0710 290 The method of claim 283 wherein a window length equals the predetermined number of UDP segments the window length having a value corresponding to the select able communication medium 0711 291 The method of claim 283 wherein the frame comprises a frame header and the frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corre sponding to the data length 0712 292 The method of claim 291 wherein the agent type indicates a value selectable from real time batch and auto 0713 293 The method of claim 291 wherein the agent name contains a name of an object that includes the agent data and executable code 0714 294 The method of claim 291 wherein the data length indicates a size in bytes of the data buffer 0715 295 The method of claim 291 wherein the data buffer is a variable size buffer containing the agent data to be transmitted 0716 296 The method of claim 283 wherein the TXU packet comprises a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet l
84. ength 0717 297 The method of claim 296 wherein the packet type indicates a value for the packet type 0718 298 The method of claim 296 wherein the session ID identifies a destination entity 0719 299 The method of claim 298 wherein the pipe number identifies a connection to the destination entity 0720 300 The method of claim 296 wherein the packet length indicates a size in bytes of the packet data 0721 301 The method of claim 296 wherein the packet length is a predetermined value corresponding to the select able communication medium US 2008 0198787 Al 0722 302 The method of claim 283 wherein each UDP segment comprises a UDP header and a UDP body the UDP header including a UDP type a packet ID the segment num ber a last segment and the UDP body including a data pay load of predetermined size 0723 303 The method of claim 302 wherein the UDP type indicates a value selectable from UDP Segment UDP ACK UDP NAK and UDP Probe 0724 304 The method of claim 302 wherein the packet ID identifies the TXU packet to which the UDP segment is designated 0725 305 The method of claim 302 wherein the segment number indicates a sequential ordering of the UDP segment within the TXU packet 0726 306 The method of claim 302 wherein the last segment indicates the segment number corresponding to a final segment in the TXU packet 0727 307 The method of claim 283 further comprising the step of
85. ent is a message sent by the receiver to the transmitter to indicate that it has correctly received a data frame Usually if the transmitter does not receive the acknowledgment before the timeout occurs i e within a predetermined amount of time after sending the data frame it retransmits the frame until it is either correctly received or the error persists beyond a predetermined number of retransmissions 0007 Ifthe maximum number of retransmissions or the maximum time spent retransmitting a frame is limited to tens of retransmissions then the ARQ protocol is defined as highly persistent or highly reliable A low persistent or partially reliable ARQ protocol on the other hand retransmits a frame 2 5 times before it gives up and transmits the next frame instead 0008 In comparison to fixed networks wireless networks may seem to have very similar properties However when the radio quality is low data loss may occur over a wireless link due to transmission errors In cellular networks handovers also cause data loss Data loss due to handover occurs par ticularly often ifa user moves at high speed from one wireless node to another Handover typically results in delay and in many cases data loss Delay is introduced since it takes time to forward data to a new base station and to perform the handover procedure Data loss occurs if an old base station flushes its buffer instead of forwarding data to the new base station The handove
86. entifies the TXU packet to which the UDP segment is designated 0669 275 The method of claim 272 wherein the segment number indicates a sequential ordering of the UDP segment within the TXU packet 0670 276 The method of claim 272 wherein the last segment indicates the segment number corresponding to a final segment in the TXU packet 0671 277 The method of claim 250 further comprising the step of 0672 at the first computing device waiting a predeter mined probe time without receiving an ACK or a NAK prior to sending at least one probe message to the second computing device 0673 278 The method of claim 277 wherein the at least one probe message includes a segment number of a recent UDP segment for which the ACK was received 0674 279 The method of claim 277 wherein a predeter mined probe retry count denotes the number ofthe at least one probe message to send to the second computing device with out receiving the ACK or the NAK before reporting an error 0675 280 The method of claim 250 further comprising the step of 0676 at the second computing device upon sending a NAK to the first computing device waiting a predeter mined probe time without receiving a UDP segment prior to sending at least one probe message to the first computing device 0677 281 The method of claim 280 wherein the at least one probe message includes a segment number for the UDP segment most recently received 0678 282 The
87. ermines that a two part technical specification for the product is also required but the second part is a relatively large file A cost analysis is performed to determine whether to send the speci fication to the mobile device 102 The analysis reveals that the field service technician will be back in cellular range part way through the trip to the new service call and that the first part of the specification may be downloaded at that time Further the analysis also reveals that a Wi Fi 104 hot spot is available on the trip path with only a slight detour and that it would be cost beneficial to make the detour so that the second part of the specification may downloaded relatively quickly rather than by the slower and in this instance more expensive cellular connection The satellite 108 communication medium is used only to send the agent 120 back to the mobile device 102 with the new schedule and related information for downloading the technical specification via GPRS 106 and Wi Fi 104 Upon arrival back at the mobile device 102 the agent 120 displays the new schedule and related customer information TXP2 Protocol 0096 FIG 2 is a diagram illustrating the primary data structures 200 of the TXP2 protocol A frame 124 is decon structed into TXU packets 126 and the TXU packets are divided into UDP segments 0097 An agent 120 together with any associated file video or other data is converted into a frame 124 Each frame 124 includes
88. error 0355 84 The method of claim 57 further comprising the step of 0356 at the second computing device upon sending a NAK to the first computing device waiting a predeter mined probe time without receiving the UDP segment prior to sending at least one probe message to the first computing device US 2008 0198787 Al 0357 85 The method of claim 84 wherein the at least one probe message includes a segment number for the UDP seg ment most recently received 0358 86 The method of claim 84 wherein a predeter mined probe retry count denotes a count of the at least one probe message to send to the first computing device without receiving the UDP segment before reporting an error 0359 87 A system for data communication between mul tiple computing devices the system comprising 0360 a first computing device configured for commu nication through a selectable communication medium with a second computing device the first computing device comprising 0361 a first TXM module operable for 0362 receiving the data from a first application 0363 constructing a frame for the data 0364 dividing the frame into a plurality of TXU packets that collectively comprise a frame body 0365 sending a TXU packet from the plurality of TXU packets to a first TXU module and 0366 upon receiving notification that the TXU packet has been sent successfully if a next TXU packet from the plurality of TXU packets remains to
89. es the segment num ber for the UDP segment most recently received 0587 226 The method of claim 224 wherein a predeter mined probe retry count denotes a number of the at least one UDP segment probe message to send to the first computing device without receiving the UDP segment before reporting an error 0588 227 A method for receiving data from a first com puting device comprising steps of 0589 receiving data through a selectable communica tion medium from the first computing device the receiv ing comprising 0590 receiving a plurality of UDP segments 0591 assembling the plurality of UDP segments to recreate a TXU packet 0592 upon determination that a last UDP segment for the TXU packet has been received sending an ACK message to the first computing device and 0593 upon determination that at least one UDP seg ment was not received sending a NAK message that specifies at least one missing UDP segment to the first computing device 0594 upon determination that a final TXU packet for a frame has been received recreating the frame by reassembling a plurality of TXU packets 0595 228 The method of claim 227 wherein the select able communication medium is a wireless network 0596 229 The method of claim 228 wherein the select able communication medium includes one or more of a Wi Fi network a GPRS General Packet Radio Service network a US 2008 0198787 Al CDMA Code Division Multiple Access n
90. esources are available at a second computing device and 0626 upon determination that the second resources are available at the second computing device trans porting the agent through a selectable communication medium to the second computing device and 0627 at the second computing device 0628 receiving the agent from the first computing device and 0629 performing the second task 0630 251 The method of claim 250 wherein the select able communication medium is a wireless network 0631 252 The method of claim 251 wherein the select able communication medium includes one or more of a Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 0632 253 The method of claim 252 further comprising 0633 switching to a different selectable communica tion medium during transmission of agent data 0634 254 The method of claim 252 further comprising 0635 switching to a different selectable communica tion medium during reception of agent data 0636 255 The method of claim 250 the transporting fur ther comprising 0637 constructing a frame for agent data wherein the agent data includes the first executable code for the first task and the second executable code for the second task 0638 dividing the frame into a plurality of XU packets that collectively comprise a fra
91. et for a new frame creating the new frame upon determination that a final TXU packet for the new frame has been received recreating the new frame by reassembling the plurality of TXU pack ets that include the data and providing the data from the new frame to a second application 22 The system of claim 21 wherein the first TXU module is further configured for waiting a predetermined probe time without receiving an ACK or a NAK before sending a probe message to the second TXU module 23 The system of claim 22 wherein a predetermined probe retry count denotes a count of probe messages to send to the second TXU module without receiving the ACK or the NAK before reporting an error 24 The system of claim 21 wherein the first computing device is further configured for upon sending a NAK to the second computing device waiting a predetermined probe time without receiving the UDP segment before sending a probe message to the second computing device 25 The system of claim 24 wherein a predetermined probe retry count denotes a count of probe messages to send to the first TXU module without receiving the UDP segment before reporting an error US 2008 0198787 Al 26 A method for transporting agents having a plurality of related tasks that enables agents to perform tasks at separate computing devices comprising steps of at a first computing device having an agent with a first executable code for a first task and a secon
92. etwork a GSM Global System for Mobile communications network and a satellite network 0597 230 The method of claim 227 further comprising the step of 0598 switching to a different selectable communica tion media during reception of the data 0599 231 The method of claim 227 wherein the frame comprises a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corresponding to the data length 0600 232 The method of claim 231 wherein the agent typeisaone byte field indicating a value selectable from real time batch and auto 0601 233 The method of claim 231 wherein the agent name is a 40 byte field and contains a name of an object wherein the object includes the data and executable code 0602 234 The method of claim 231 wherein the data length is a 4 byte field indicating a size in bytes of the data buffer 0603 235 The method of claim 231 wherein the data buffer is a variable size buffer containing the data to be trans mitted 0604 236 The method of claim 227 wherein each TXU packet comprises a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length 0605 237 The method of claim 236 wherein the packet type is a one byte field indicating a value for the packet typ
93. fer for data and corresponding to the data length 0017 Another embodiment provides a system for data communication between multiple computing devices com prising a first computing device configured for communica tion through a selectable communication medium with a sec ond computing device the first computing device comprising a first TXM module operable for receiving the data from a first application constructing a frame for the data dividing the frame into TXU packets that collectively com prise a frame body sending a TXU packet to a first TXU module and upon receiving notification that the TXU packet has been sent successfully ifa next TXU packet remains to be sent sending the next TXU packet to the first TXU module the first TXU module operable for receiving the TXU packet from the first TXM module dividing the TXU packet into UDP segments grouping the UDP segments into at least one window wherein the window includes a predetermined num Aug 21 2008 ber of UDP segments and sending the window through the selectable communication medium to a second TXU module at the second computing device upon receipt of an ACK message if a next window remains sending the next window to the second TXU module and upon the receipt of a NAK message that specifies at least one missing UDP segment retransmitting the missing UDP segment to the second TXU module the second computing device configured for com munication through the
94. fies a destination entity 19 Aug 21 2008 0295 44 The method of claim 43 wherein the pipe num ber identifies a connection to the destination entity 0296 45 The method of claim 31 wherein the packet length indicates the size in bytes of the packet data 0297 46 The method of claim 31 wherein the UDP type is a field indicating a value selectable from UDP Segment UDP ACK UDP NAK and UDP Probe 0298 47 The method of claim 31 wherein the packet ID is a field identifying the TXU packet to which the UDP segment is designated 0299 48 The method of claim 31 wherein the segment number is a field indicating a sequential ordering of the UDP segment within the TXU packet 0300 49 The method of claim 31 wherein the last seg ment is a field indicating the segment number corresponding to a final segment in the TXU packet 0301 50 The method of claim 31 wherein the UDP body comprises UDP segment data to be transmitted 0302 51 The method of claim 31 further comprising the step of 0303 at the first computing device waiting a predeter mined probe time without receiving an ACK or a NAK prior to sending at least one UDP segment probe mes sage to the second computing device 0304 52 The method of claim 51 wherein the at least one UDP segment probe message includes the segment number of a recent UDP segment for which the ACK was received 0305 53 The method of claim 51 wherein a predeter mine
95. for mation and schedule information among others A mobile device 102 has capability for receiving using and changing end user application data 132 0079 A TXP2 server 134 provides services such as for example a delivery order entry system or field service order entry among others The server 134 provides access to a TXP2 database 136 for such functionality as retrieving ser vice history user s manuals account information schedule information and other server intensive operations 138 Of course the server 134 also receives data from computer or other remote devices such as the mobile device 102 and stores the data in the database 136 0080 In one exemplary embodiment a deliveryman 128 communicates with a server 134 and confirms a delivery for example Of course many delivery or field service type func tions could be provided and confirmed using the systems and methods described 0081 In another exemplary embodiment a field service repairman 130 requests information from a server 134 The requested information could include warranty status account information device model number technical specification documents user s manual customer address delivery sched ule or repair history among others One of skill in the art will readily recognize that multiple types of information related to customer equipment location or other factors could be pro vided through the network 0082 A pipe 118 is created for communi
96. for example but not limited to a deliv eryman 128 and a field service repairman 130 to utilize a mobile device 102 for communication with a TXP2 server 134 or other computing device over a network 110 The mobile device 102 typically accesses the network 110 using a variety of different wired or wireless channels such as for example Wi Fi 104 GPRS CDMA and or GSM referred to collectively in this document as GPRS 106 and Satellite 108 Though FIG 1 specifically illustrates the use of wireless networks one of skill in the art will readily note that multiple types of devices may be configured using a variety of wired or wireless networks utilizing the systems and methods described herein 0077 The mobile device 102 and the server 134 each typically contain software that includes both mobile intensive code 112 and server intensive code 114 Mobile intensive Aug 21 2008 code 112 is executable code having an emphasis on mobile device 102 functionality Similarly server intensive code 114 is executable code having an emphasis on server 134 func tionality such as performing server intensive operations 138 or accessing databases for example 0078 A remote electronic device such as a mobile device 102 performs end user applications such as delivery confir mation 128 and field service 130 among others End user applications often require end user application data 132 such as for example service history user s manual account in
97. g 0687 constructing a frame for agent data wherein the agent data includes the first execut able code for the first task and the second executable code for the second task 0688 dividing the frame into a plurality of TXU packets that collectively comprise a frame body 0689 dividing a TXU packet from the plurality of TXU packets into a plurality of UDP seg ments 0690 grouping the plurality of UDP segments into at least one window for transmission through the selectable communication medium wherein the at least one window includes a pre determined number of UDP segments from the plurality of UDP segments and 0691 sending the at least one window to the second computing device 0692 at the second computing device receiving the agent data through the selectable communication medium from the first computing device the receiving comprising 0693 receiving UDP segments from among the plu rality of UDP segments assembling the UDP seg ments to recreate the TXU packet 0694 upon determination that a UDP segment from received UDP segments corresponds to a window first segment prior to a final window first segment for the TXU packet sending an ACK to the first computing device 0695 upon determination that at least one UDP seg ment from the UDP segments was not received send ing a NAK message to the first computing device the NAK message specifying a segment number for each missing UDP segment and 0696
98. g a segment number for each missing UDP segment and upon determination that a final UDP segment for the TXU packet has been received sending an ACK message to the first computing device at the first module space upon receiving a NAK message retransmitting missing UDP segments to the second module space and at the second module space upon determination that a final TXU packet for the frame has been US 2008 0198787 Al assembled recreating the frame for the agent by reassem bling the TXU packets and executing the task 0023 Other systems methods features and advantages of the present invention will be or become apparent to one with skill in the art upon examination of the following drawings and detailed description It is intended that all such additional systems methods features and advantages be included within this description and be within the scope of the present disclosure BRIEF DESCRIPTION OF THE DRAWINGS 0024 Many aspects of the invention can be better under stood with reference to the following drawings The compo nents in the drawings are not necessarily to scale emphasis instead being placed upon clearly illustrating the principles of the present invention Moreover in the drawings like refer ence numerals designate corresponding parts throughout the several views 0025 FIG 1 is a high level overview of exemplary aspects of a system for automatic mobile data object transmission over wireless communicat
99. g device the NAK message specifying the segment number for each missing segment 0275 at the first computing device upon receiving the ACK message if a next window from the at least one window remains to be sent sending the next window from the first computing device to the second computing device 0276 at the first computing device upon receipt of the NAK message 0277 retransmitting missing UDP segments to the sec ond computing device the retransmitting comprising 0278 identifying a plurality of missing UDP seg ments according to the NAK message 0279 grouping the plurality of missing UDP seg ments into a retransmit window the retransmit win dow having a number of UDP segments correspond ing to a count of missing UDP segments and 0280 sending the retransmit window to the second computing device and 0281 at the second computing device upon determina tion that a final TXU packet for the frame has been received recreating the frame by reassembling the plu rality of TXU packets 0282 32 The method of claim 31 wherein the selectable wireless communication medium includes one or more of a Wi Fi network a GPRS General Packet Radio Service net work a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 0283 33 The method of claim 31 further comprising the step of 0284 switching to a different selectable communica t
100. he first computing device upon verifying that first resources are available at the first computing device performing the first task upon determination that the second task is required determining whether second resources are available at the first computing device upon determination that the second resources are not available at the first computing device determining whether the second resources are available at a second computing device and upon determination that the second resources are available at the second computing device transporting the agent through a selectable commu nication medium to the second computing device and at the second computing device receiving the agent from the first computing device and performing the second task 0019 Another embodiment provides a method for trans porting agents having related tasks that enables agents to perform tasks at separate computing devices comprising at a first computing device having an agent with a first executable code for a first task and a second executable code for a second task upon determination that the first task is required deter mining whether first resources are available at the first com puting device upon verifying that first resources are available at the first computing device performing the first task upon determination that the second task is required determining whether second resources are available at the first computing device upon determination
101. he agent wherein the first module space comprises space information for transport and execution of the agent upon determination that a task is required determining whether task resources are available at the first computing device upon determination that the task resources are unavailable transporting the agent to a second computing device com prising allocating a session between the first module space and a second module space on the second computing device opening a pipe through the session the pipe having full duplex capability and transmitting the agent through the pipe to the second module space the transmitting comprising at the first module space transmitting the agent through a select able communication medium to the second module space comprising constructing a frame for the agent dividing the frame into TXU packets that collectively comprise a frame body dividing each TXU packet into UDP segments group ing the UDP segments into at least one window for transmit ting through the selectable communication medium wherein the window includes a predetermined number of UDP seg ments and sending the window to the second module space at the second computing device receiving the agent into the second module space comprising receiving UDP segments assembling the UDP segments to recreate a TXU packet upon determination that at least one UDP segment was not received sending a NAK message to the first module space specifyin
102. he first segment s1 of window W1 an ACK 302 is sent to the mobile device 102 so that the next window W2 can be sent However in this scenario not all UDP segments 128 of window WI are received by the server 134 but rather there are three missing segments 306 s2 s3 and s4 0123 Even though segments s2 s3 and s4 were not received the receiver sends an ACK 302 upon receiving the first segment s1 of window W1 Thus the sender can begin sending the next window in this case window W2 When the sender receives the ACK 302 the sender begins to send win dow W2 to the receiver with the next group of UDP segments s9 s16 0124 Upon receiving segment s5 and determining that segments s2 s3 and s4 have not been received a NAK 308 is sent to the mobile device 102 The NAK indicates that seg ments s2 s3 and sd are missing and should be resent A NAK US 2008 0198787 Al is not necessary for each UDP segment 128 but rather if multiple UDP segments 128 are determined missing simul taneously as in receiving segment s5 after segment s1 a single NAK suffices for the entire group of missing segments Upon receiving the NAK indicating missing segments s2 s3 and s4 a window W3 containing the three missing segments 306 is assembled and segments s2 s3 and s4 are retransmit ted to the server 134 0125 Upon receiving the first segment s9 of window two W2 the receiver sends an ACK 302 so that the sender can send the next wi
103. her first resources are available upon verifying availability of first resources performing the first task upon determination that a second task is required deter mining whether second task resources are available at the first computing device upon determination that the second task resources are unavailable at the first computing device transporting the agent to a second computing device the transport ing comprising at the first computing device transmitting the agent througha selectable communication medium to the second computing device the transmitting compris ing constructing a frame for agent data dividing the frame into a plurality of TXU packets that collectively comprise a frame body dividing each TXU packet into a plurality of UDP segments grouping the plurality of UDP segments into at least one window for transmitting through the selectable communication medium wherein the at least one window includes a predetermined number of UDP segments from the plurality of UDP segments and sending the at least one window to the second com puting device atthe second computing device receiving the agent data through the selectable communication medium from the first computing device the receiving comprising receiving at least one UDP segment assembling UDP segments to recreate a TXU packet upon determination that at least one UDP segment was not received sending a NAK message to the US 2008 0198787 Al 37 first com
104. his document a capitalized term shall have the same meaning as an uncapi talized term unless the context of the usage specifically indi cates that a more restrictive meaning for the capitalized term is intended A capitalized term within the glossary usually indicates that the capitalized term has a separate definition within the glossary However the capitalization or lack thereof within the remainder of this document is not intended Aug 21 2008 to be necessarily limiting unless the context clearly indicates that such limitation is intended DEFINITIONS GLOSSARY 0036 Agents Data communication objects that contain both executable code and data necessary for performing spe cific tasks on a computer or computerized device Agents may be sent from one computer or device to another and once transmitted require no interaction with the transmitting device to complete their task 0037 Application A computer program that operates on a computer system e g but not limited to a computer program operated on a TXP2 server or a computer program operated within a mobile device a mobile application Further examples of applications include programs that perform a search in a database receive and store information in a tem porary memory ofa mobile device display selected informa tion on a mobile device display results of processing etc and virtually any other type of program that generates trans actions or is responsive to tr
105. iations modifications and equivalent arrange ments the present invention being limited only by the claims appended hereto and to the equivalents thereof What is claimed is 1 A method for data communication between a remote electronic device and a server comprising steps of at the remote electronic device transmitting data through a selectable communication medium to the server further comprising constructing a frame for data the frame comprising a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corresponding to the data length dividing the frame into a plurality of TXU packets that collectively comprise the frame body wherein aTXU packet from the plurality of TXU packets comprises a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length dividing the TXU packet into a plurality of UDP seg ments wherein a UDP segment from the plurality of UDP segments comprises a UDP header and a UDP 32 Aug 21 2008 body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data payload of predetermined size grouping the plurality of UDP segments into at least one window for transmission through the selectable com munication mediu
106. ications over wireless networks using TXP2 has several benefits 1 Reduced network requests over the wireless network occur due to the composition of the transmitted data into discrete blocks of data objects as opposed to interactive streams 2 US 2008 0198787 Al The complex details of the wireless communication process are abstracted from the application logic 3 Agents are typi cally compressed and encrypted before transmission provid ing efficient and secure communication 4 A single virtual session is necessary for an application to communicate with other TXP2 enabled computing devices while TCP IP com munication requires 2 sockets for each pair of communicating devices 5 Wireless networks using TXP2 provide dramati cally higher average data transmission rates compared with wireless networks using TCP IP 0074 As noted previously the benefits afforded to wire less communications by TXP2 also provide improvements for wired network communications 1 Combining the data into discrete blocks of data objects rather than interactive streams reduces network requests for wired networks as well Indeed if the wired network functions with few transmission errors then the requests necessary to correct those errors drop even more significantly 2 The details for wired networks are typically not as complex as wireless networks however the abstraction remains and the communications process details are simplified at the applicati
107. ice is used by TXP2 to deconstruct the agent 120 into a frame 124 for transmission through the selected communication medium At the receiv ing computing device TXP2 uses the virtual space 604 to reconstruct the agent 120 US 2008 0198787 Al 0164 The virtual space 604 is an information object main tained on each communicating computing device and con tains the information necessary for constructing the agent 120 and its execution context Upon determination that an agent is to be transported from one computer to another through the selected communication medium for example a virtual ses sion 116 is opened between the TXM 608 modules on the two computers If the communication is the first time that the first computer has sent an agent 120 to the second computer the virtual space 604 from the sending computer is recreated at the receiving computer Thus the agent 120 operates within the same effective virtual space 604 on both computers 0165 A mirror of the virtual space 604 from the sending application on the sending computer is created by TXP2 on any computers to which the application transports agents 120 Identical virtual spaces 604 on sending and receiving com puters allows for synchronization of the information between these virtual spaces 604 Thus TXP2 need not send all the information necessary to reconstruct and execute the agent 120 Rather only the unique data of the agent instance is transmitted resulting in smal
108. ided into UDP segments 128 numbered s1 s24 As above the window size in this scenario is 8 UDP segments 128 therefore the mobile device 102 sender groups 8 UDP segments 128 per window and sends the first window W1 to the receiving server 134 As in the previous scenario upon receiving the first segment s1 of window W1 an ACK 302 is sent to the mobile device 102 Aug 21 2008 so that the next window W2 can be sent However in this scenario not all UDP segments 128 of window W1 are received by the server 134 but rather there is one missing segment 306 s7 0117 Upon receiving the ACK 302 the mobile device 102 begins sending window W2 including the next group of UDP segments 128 numbered s9 s16 to the server 134 Again upon receiving the first segment s9 of window W2 an ACK 302 is sent to the mobile device 102 so that the next window W3 can be sent 0118 Upon determining that segment s7 of window W1 has not been received a NAK 308 is sent to the mobile device 102 The NAK 308 specifies the missing segment number s7 in the message so that the missing segment 306 s7 can be resent A third window W3 that includes only the missing segment 306 s7 is assembled and then transmitted to the server 134 Of course window W3 and window W4 could be swapped in order depending upon when the receiver deter mines that a UDP segment 128 is missing For simplicity in this example it is assumed that the missing segment 306 is
109. ing device comprising at the first computing device transmitting the agent through a selectable communication medium to the second computing device comprising constructing a frame for agent data divid ing the frame into TXU packets that collectively comprise a frame body dividing each TXU packet into UDP segments grouping the UDP segments into at least one window for transmitting through the selectable communication medium wherein the window includes a predetermined number of UDP segments and sending the window to the second com puting device at the second computing device receiving the agent data through the selectable communication medium from the first computing device comprising receiving at least one UDP segment assembling UDP segments to recre ate a TXU packet upon determination that at least one UDP segment was not received sending a NAK message to the first computing device specifying the missing UDP segment and upon determination that a final UDP segment for the TXU packet has been received sending an ACK message to the first computing device at the first computing device upon receiv Aug 21 2008 ing the NAK message retransmitting the UDP segment to the second computing device and at the second computing device upon determination that a final TXU packet for the frame has been assembled recreating the frame for the agent data by reassembling the TXU packets and performing the second task 0021 Another e
110. ion media during transmission of the data 0285 34 The method of claim 31 wherein the predeter mined number of UDP segments for the at least one window is an optimized value corresponding to the selectable wireless communication medium 0286 35 The method of claim 31 wherein the packet length is a predetermined value corresponding to the select able wireless communication medium 0287 36 The method of claim 31 wherein a UDP seg ment length indicates a UDP segment size for the UDP seg ment the UDP segment size corresponding to the selectable wireless communication medium 0288 37 The method of claim 31 wherein a window length equals the predetermined number of UDP segments the window length having a value corresponding to the select able wireless communication medium 0289 38 The method of claim 31 wherein the agent type is a field indicating a value selectable from realtime batch and auto 0290 39 The method ofclaim 31 wherein the agent name contains a name of an object wherein the object includes the data and executable code 0291 40 The method of claim 31 wherein the data length indicates the size in bytes of the data buffer 0292 41 The method of claim 31 wherein the data buffer is a variable size buffer containing the data to be transmitted 0293 42 The method of claim 31 wherein the packet type indicates a value for the packet type 0294 43 The method of claim 31 wherein the session ID identi
111. ion networks using UDP and the TXP2 two level protocol 0026 FIG 2 is a diagram illustrating the frame packet and UDP segment relationships for the TXP2 two level pro tocol of FIG 1 0027 FIG 3 is a diagram illustrating TXP2 data transmis sion and re transmission scenarios for the TXP2 frame of FIG 2 0028 FIG 4 is a high level flowchart of the TXP2 algo rithm for FIG 1 0029 FIG 5A is a detailed flowchart of the TXP2 algo rithm for sending data according to FIG 1 0030 FIG 5B is a detailed flowchart of the TXP2 algo rithm for receiving data according to FIG 1 0031 FIG 6 is an illustration of exemplary aspects of the TXP2 communications protocol functionality of FIG 1 0032 FIG 7 is a diagram illustrating the differences between the OSI model and the TXP2 model 0033 FIG 8 is a diagram illustrating the probe function ality of the TXP2 protocol 0034 FIG 9 is a diagram illustrating multiple mobile devices and other devices using the TXP2 protocol of FIG 1 DETAILED DESCRIPTION 0035 Prior toa detailed description of the invention s the following definitions are provided as an aid to understanding the subject matter and terminology of aspects of the present invention s are exemplary and not necessarily limiting of the invention s which are expressed in the claims Whether or not a term is capitalized is not considered definitive or limiting of the meaning of a term As used in t
112. is a field indicating the segment number correspond ing to a final segment in the TXU packet 0485 157 The method of claim 138 wherein the UDP body comprises UDP segment data to be transmitted 0486 158 The method of claim 138 further comprising the step of 0487 at the first computing device waiting a predeter mined probe time without receiving an ACK or a NAK prior to sending at least one UDP segment probe mes sage to the second computing device 0488 159 The method of claim 158 wherein the at least one UDP segment probe message includes the segment num ber of a recent UDP segment for which the ACK was received 0489 160 The method of claim 158 wherein a predeter mined probe retry count denotes the number ofthe at least one UDP segment probe message to send to the second computing device without receiving the ACK or the NAK before report ing an error 0490 161 A method for data communication between a first computing device and a second computing device com prising steps of 0491 at the first computing device 0492 transmitting data through a selectable communi cation medium to the second computing device the transmitting comprising 0493 constructing a frame for the data 0494 dividing the frame into a plurality of TXU packets 0495 dividing the plurality of TXU packets into a plurality of UDP segments 0496 grouping the plurality of UDP segments into at least one window wherein th
113. laim 69 further comprising switching to a different selectable communication medium during reception of the agent 72 A method for transporting and executing agents having a plurality of related tasks that enables agents to perform tasks at separate computing devices comprising steps of at a first computing device receiving an agent into a first module space correspond ing to the agent wherein the first module space com prises space information for transport and execution of the agent upon determination that a task is required determining whether task resources are available at the first com puting device upon determination that the task resources are unavail able transporting the agent to a second computing device the transporting comprising allocating a session between the first module space and a second module space on the second comput ing device opening a pipe through the session the pipe having full duplex capability and transmitting the agent through the pipe to the second module space the transmitting comprising at the first module space transmitting the agent through a selectable communication medium to the second module space the transmitting com prising constructing a frame for the agent dividing the frame into a plurality of TXU pack ets that collectively comprise a frame body dividing each TXU packet into a plurality of UDP segments grouping the plurality of UDP segments into at least one wind
114. ler amounts of data being sent between computing devices The entire execution context and code need not be sent with each transmission 0166 The first time that an agent 120 is transported the agent information is stored in the agent list of all related virtual spaces 604 For subsequent transportations of the agent 120 only the new information for that particular agent instance need be sent The data is typically compressed and encrypted before transmission The compression efficiency is enhanced due to the compression table resulting from the first compression of a particular agent that is also stored and maintained across multiple virtual spaces 604 0167 Caching of the virtual space 604 decreases the usage of main memory at the communicating computers The cach ing is accomplished by using an in memory table of virtual spaces 604 stored in the local memory of each communicat ing computer Of course the table size is configurable The caching is accomplished by maintaining the current active virtual space 604 in the table and swapping out the least used virtual spaces 604 to the local database With virtual space caching it is possible for a computer to support an unlimited number of users 0168 The virtual space 604 contains the information nec essary for the transfer and execution of agents 120 including 1 a version ID 2 a session ID 3 a user ID 4 a device ID 5 an encryption key 6 an IP address 7 an IP port
115. list an error code and an error message 57 The method of claim 56 wherein the user ID is pro vided by an application at the first computing device 58 The method of claim 56 wherein the device ID is provided by an application at the first computing device 59 The method of claim 56 wherein the session ID is generated from the user ID and the session ID 60 The method of claim 56 wherein the encryption key is generated and exchanged using Diffie Hellman key exchange 61 The method of claim 56 wherein the IP address con tains a network address corresponding to the first computing device 62 The method of claim 56 wherein the status includes status information about the first module space 63 The method of claim 56 wherein the agent list identi fies the agents 64 The method of claim 56 wherein the frame list includes a list of frames to be sent or received 65 The method of claim 56 wherein the error code is the error code occurring most recently during transport of the agent 66 The method of claim 56 wherein the error message is the error message occurring most recently during transport of the agent 67 A method for transporting and executing agents having a plurality of related tasks that enables agents to perform tasks at separate computing devices comprising steps of at a first computing device receiving an agent into a first module space corresponding to the agent wherein the first module space com
116. ll determine if real time mode is possible based off of network conditions and if so will report to thesending application that a real time transport has begun Otherwise the TXM module will report to the application that a batch transport has begun This allows the application to wait only if real time mode is possible System Overview 0057 The embodiments of the present invention are pref erably implemented as a special purpose or general purpose computer including various computer hardware as discussed in greater detail below Embodiments within the scope of the present invention also include computer readable media for carrying or having computer executable instructions or data structures stored thereon Such computer readable media can be any available media which can be accessed by a general purpose or special purpose computer or downloadable to through wireless communication networks By way of example and not limitation such computer readable media can comprise physical storage media such as RAM ROM flash memory EEPROM CD ROM DVD or other optical disk storage magnetic disk storage or other magnetic storage devices any type of removable non volatile memories such as secure digital SD flash memory memory stick etc or any other medium which can be used to carry or store com Aug 21 2008 puter program code in the form of computer executable instructions or data structures and which can be accessed by a general purp
117. m wherein the at least one window includes a predetermined number of UDP segments from the plurality of UDP segments and sending the at least one window to the server at the server receiving the data through the selectable communication medium from the remote electronic device the receiving comprising receiving at least one UDP segment assembling UDP segments to recreate the TXU packet upon determination that the segment number of the UDP segment indicates a window first segment prior to a final window first segment for the TXU packet send ing an ACK to the remote electronic device upon determination that at least one UDP segment was not received sending a NAK message to the remote electronic device the NAK message specifying the segment number for each missing segment and upon determination that a final UDP segment for the TXU packet has been received sending an ACK mes sage to the remote electronic device at the remote electronic device upon receiving the ACK message from the server if a next window from the at least one window remains to be sent sending the next window from the remote electronic device to the server at the remote electronic device upon receipt of the NAK message retransmitting missing UDP segments to the server the retransmitting comprising identifying a plurality of missing UDP segments accord ing to the NAK message grouping the plurality of missing UDP segments into a retransmit window the
118. mber of TXP2 enabled computers simultaneously Pipes 118 are created for commu nications between computers or other computing devices A pipe 118 is allocated withina virtual session 116 and typically connects two devices to provide for the transmission of UDP segments 128 over IP A pipe is typically used for the com munication of a single frame single data entity or object and is terminated and release once the communication is completed 0185 The virtual session 116 typically operates over a wireless communication medium though any network that uses IP will suffice 0186 Additionally the communication medium through which the virtual session 116 operates is selectable and changeable For TXP2 the frame size the TXU packet size the UDP segment size and the window groupings for UDP segments are optimized according to the communication medium For example a field service technician 130 on the way to a service call typically receives updates at a mobile device 102 such as a handheld computer through multiple wireless networks TXP2 adjusts for the different cellular networks and or satellite network as the mobile device moves from one geographical area to another Even though the underlying IP address and port numbers change the commu US 2008 0198787 Al nications typically continue transparently to the mobile device 102 and the other communicating computer 0187 A configuration file contains values optimized for the
119. mbling the plu rality of TXU packets 0326 58 The method of claim 57 wherein the selectable communication medium is a wireless network 0327 59 The method of claim 58 wherein the selectable communication medium includes one or more of a Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 0328 60 The method of claim 59 further comprising the step of 0329 switching to a different selectable communica tion media during transmission of the data 0330 61 The method of claim 59 further comprising the step of 0331 switching to a different selectable communica tion media during reception of the data 0332 62 The method of claim 57 wherein the predeter mined number of UDP segments for the at least one window is an optimized value corresponding to the selectable com munication medium 0333 63 The method of claim 57 wherein a UDP seg ment length indicates a UDP segment size for the UDP seg ment the UDP segment size having a value corresponding to the selectable communication medium 0334 64 The method of claim 57 wherein a window length equals the predetermined number of UDP segments the window length having a value corresponding to the select able communication medium 0335 65 The method of claim 57 wherein the frame comprises a frame header and a frame body
120. mbodiment provides a method for trans porting and executing agents having related tasks that enables agents to perform tasks at separate computing devices comprising at a first computing device receiving an agent into a first module space corresponding to the agent wherein the first module space comprises space information for transport and execution of the agent upon determination that a task is required determining whether task resources are available at the first computing device upon determination that the task resources are unavailable at the first computing device transporting the agent to a second computing device comprising allocating a session between the first module space on the first computing device and a second module space on the second computing device opening a pipe through the session the pipe having full duplex capability and transmitting the agent through the pipe to the second module space wherein the agent is transmitted by the first module space through a selectable communication medium to the second module space at the second computing device receiving the agent into the second module space and execut ing the task 0022 Another embodiment provides a method for trans porting and executing agents having a plurality of related tasks that enables agents to perform tasks at separate com puting devices comprising at a first computing device receiving an agent into a first module space corresponding to t
121. me body 0639 dividinga TXU packet from the plurality of TXU packets into a plurality of UDP segments 0640 grouping the plurality of UDP segments into at least one window for transmission through the select able communication medium wherein the at least one US 2008 0198787 Al window includes a predetermined number of UDP seg ments from the plurality of UDP segments and 0641 sending the at least one window to the second computing device 0642 256 The method of claim 255 further comprising 0643 upon receiving a NAK message retransmitting at least one missing UDP segment to the second computing device 0644 257 The method of claim 255 the receiving further comprising 0645 receiving UDP segments from among the plural ity of UDP segments 0646 assembling the UDP segments to recreate the TXU packet 0647 upon determination that a UDP segment from received UDP segments corresponds to a window first segment prior to a final window first segment for the TXU packet sending an ACK to the first computing device 0648 upon determination that at least one UDP seg ment from the UDP segments was not received sending a NAK message to the first computing device the NAK message specifying a segment number for each missing UDP segment and 0649 upon determination that a final UDP segment from the UDP segments for the TXU packet has been received sending an ACK message to the first comput ing device 065
122. n file contains values for a probe time and a probe retry count UDP segments 128 may often be lost or out of order when received Additionally ACK 302 and NAK 308 messages may also be lost Aug 21 2008 0197 Upon sending UDP segments 128 an ACK 302 or NAK 308 is expected after a reasonable time to indicate either that the first UDP segment 128 of a window was received or that one or more UDP segments 128 were missing from the transmission The probe time value indicates how long a sender should wait before sending a probe message 802 to the receiver The probe time is configurable thus probe function ality is not based on a timeout but rather on receiving or not receiving a response such as an ACK 302 or a NAK 308 to the probe message A UDP segment 128 of type probe is sent as a probe message 802 to inquire whether the sender is still there and whether the UDP segments 128 were received Additionally if the probe message 802 itself is not received then the sender sends a probe message 802 again The probe retry parameter indicates how many times to resend a probe message 802 before reporting an error to the TXU 610 Again timing is not an issue but rather whether or not responses are received to the probe message 0198 ACK 302 and NAK 308 messages may also be lost when sent from the receiver to the sender After receiving the first UDP segment of a window the receiver sends an ACK 302 to let the sender know to begin se
123. nding the next window This indicates that the first UDP segment 128 was received the communication channel is functioning and to continue sending the messages It also provides modest interim feed back during the transmission of data Upon sending an ACK 302 after receiving the first UDP segment 128 ofeach window excepting the last window ofa TXU packet 126 the receiver expects to continue receiving segments until the TXU packet 126 is complete at which time another ACK 302 is sent 0199 The receiver may also send a probe message to the sender if an expected retransmission of UDP segments does not occur If a previously received UDP segment 128 was missing indicated by receiving a UDP segment 128 before another expected UDP segment 128 for example receiving segment 4 prior to receiving segment 3 then the receiver sends a NAK 308 to the sender The NAK 308 identifies the UDP segment 128 that was missing Upon sending the NAK 308 the receiver expects to subsequently receive a transmis sion containing the missing UDP segment 128 If the missing UDP segment 128 is not received then the receiver will send a probe message 802 after waiting the time specified by the probe time value Ifthe missing UDP segment 128 is still not received after waiting again for the time according to the probe time value the receiver sends another probe message 802 Again the probe retry parameter specifies how many times the receiver sends a probe message 8
124. nding to the packet length 0418 dividing the TXU packet into a plurality of UDP segments wherein a UDP segment from the plurality of UDP segments comprises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data payload of prede termined size 0419 grouping the plurality of UDP segments into at least one window for transmission through the select Aug 21 2008 able communication medium wherein the at least one window includes a predetermined number of UDP segments from the plurality of UDP segments and 0420 sending the at least one window to the server 0421 upon receiving an ACK message from the server ifa next window from the at least one window remains to be sent sending the next window from the remote elec tronic device to the server 0422 upon receipt of a NAK message 0423 retransmitting missing UDP segments from the remote electronic device to the server the retransmitting comprising 0424 identifying a plurality of missing UDP seg ments according to the NAK message 0425 grouping the plurality of missing UDP seg ments into a retransmit window the retransmit win dow having a number of UDP segments correspond ing to a count of missing UDP segments and 0426 sending the retransmit window to the server 0427 114 The method of claim 113 wherein the select able communication medium is a wireless netwo
125. ndow in this case W4 0126 Upon receiving the last segment s24 of window W4 an ACK 302 is sent to the sender if all UDP segments for TXU packet 126c have been received TXP2 determines that the last segment is received by matching the segment number 246 of the UDP segment 128 with the last segment 248 Upon determining that the last segment 248 has been received a determination is made whether all segments for the TXU packet 126c have been received If all segments for the TXU packet 126 have been received then an ACK 302 is sent 0127 As above it should be noted that an ACK 302 is not sent after receiving the first segment s17 of the last window WA Rather a final ACK 302 is sent for the final window after receiving the last segment s24 in this instance Receipt of the final ACK 302 confirms that the first window of the next TXU packet 126 can be sent 0128 FIG 4 is a high level illustration of the TXP2 algo rithm 400 Briefly the flowchart shows that a frame 124 is deconstructed and sent to a receiver where it is reassembled Atstep 402 the sender constructs a frame 124 from agent data typically received from an application At step 404 the sender divides the frame into TXU packets 126 and at step 406 the TXU packets 126 are divided into UDP segments 128 At step 408 the UDP segments 128 are assembled into windows for transmission to the receiver at step 410 0129 Next the data arrives at the receiver At step 412
126. ng whether due to availability or cost concerns among others the TXP2 begins using the configuration parameters corresponding to the newly selected communication medium 0106 Sliding Window 0107 The TXP2 protocol uses a sliding window to send the UDP segments 128 to the receiver The sliding window algorithm places a buffer between the application program and the network data flow Using a sliding window the sender transmits a specified number of data units before expecting to receive an acknowledgement ACK The data received is stored in the buffer and an application reads the buffer data at its own pace As the application reads data it frees the buffer space so that more data is transferred in 0108 Window Size 0109 A predetermined number of UDP segments 128 are grouped into a window for transmission The window size corresponds to the number of UDP segments that are sent without waiting for an ACK and depends upon a combination of the communication medium chosen and the typical trans mission error rate for that medium The number of windows corresponds to the formula Number of windows packet length window length segment length 0110 Scenario 1 0111 Inscenario 1 TXU Packet 126a is divided into UDP segments 128 numbered s1 s24 The window size in this scenario is 8 UDP segments therefore the mobile device 102 sender groups 8 UDP segments 128 per window and sends the first window W1 to the receiving server 134
127. ngth and the packet body including packet data corresponding to the packet length dividing the TXU packet into UDP segments wherein a UDP segment comprises a UDP header and a UDP body the UDP header including a US 2008 0198787 Al UDP type a packet ID a segment number a last segment and the UDP body including a data payload of predetermined size grouping the UDP segments into at least one window for transmission through the selectable communication medium wherein the window includes a predetermined number of UDP segments and sending the window to the server upon receiving an ACK message from the server if a next window remains to be sent sending the next window from the remote electronic device to the server upon receipt of a NAK mes sage retransmitting missing UDP segments from the remote electronic device to the server comprising identifying miss ing UDP segments according to the NAK message grouping the missing UDP segments into a retransmit window the retransmit window having a number of UDP segments corre sponding to a count of missing UDP segments and sending the retransmit window to the server 0016 Another embodiment provides a method for receiv ing data from a remote electronic device through a selectable communication medium comprising receiving a plurality of UDP segments wherein a UDP segment comprises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a las
128. nt 120 also acquires the related product infor mation for the scheduled service calls from the database 136 and then transfers itself back to the mobile device 102 through a pipe 118 allocated through the virtual session 116 by the TXP2 protocol At the mobile device 102 the agent 120 executes mobile intensive code 112 to load the necessary schedule information The agent 120 also checks for other information that may be needed for the service call and discovers that one customer has a product that is no longer under warranty The agent 120 then determines that an updated price structure for servicing that particular product needs to be acquired from the server 134 The agent 120 then transports itself back to the server 134 to acquire the updated product pricing structure At the server 134 the agent 120 utilizes the server intensive code 114 to access the database 136 and acquire the updated product pricing structure Finally the agent 120 transports itself back to the mobile device 102 and displays information signifying that neces sary information has been loaded The field service technician 130 enters the service vehicle and begins traveling to the day s first scheduled service call 0092 Once on the road the mobile device 102 is no longer in range of the Wi Fi 104 communication medium and switches to using a cellular communication medium such as GPRS 106 for any necessary communications with the server 134 After finishing a fir
129. nt selectable communication medium during reception of agent data 31 The method of claim 26 the transporting further com prising constructing a frame for agent data wherein the agent data includes the first executable code for the first task and the second executable code for the second task dividing the frame into a plurality of TXU packets that collectively comprise a frame body dividing a TXU packet from the plurality of TXU packets into a plurality of UDP segments grouping the plurality of UDP segments into at least one window for transmission through the selectable com munication medium wherein the at least one window includes a predetermined number of UDP segments from the plurality of UDP segments and sending the at least one window to the second computing device 32 The method of claim 31 further comprising upon receiving a NAK message retransmitting at least one missing UDP segment to the second computing device 33 The method of claim 31 the receiving further compris ing receiving UDP segments from among the plurality of UDP segments assembling the UDP segments to recreate the TXU packet upon determination that a UDP segment from received UDP segments corresponds to a window first segment Aug 21 2008 prior to a final window first segment for the TXU packet sending an ACK to the first computing device upon determination that at least one UDP segment from the UDP segments was not receiv
130. o the destination entity 0246 17 The method of claim 1 wherein the packet length is a 2 byte field indicating the size in bytes ofthe packet data 0247 18 The method of claim 1 wherein the UDP type is a one byte field indicating a value selectable from UDP Segment UDP ACK UDP NAK and UDP Probe 0248 19 The method of claim 1 wherein the packet ID is atwo byte field identifying the TXU packet to which the UDP segment is designated 0249 20 The method of claim 1 wherein the segment number is a one byte field indicating a sequential ordering of the UDP segment within the TXU packet 0250 21 The method of claim 1 wherein the last segment is aone byte field indicating the segment number correspond ing to the final UDP segment in the TXU packet 0251 22 The method of claim 1 wherein the UDP body comprises UDP segment data to be transmitted 0252 23 The method of claim 1 further comprising the step of 0253 at the remote electronic device waiting a prede termined probe time without receiving the ACK or a NAK before sending a probe message to the server 0254 24 The method of claim 23 wherein the probe message is a type of the UDP segment 0255 25 The method of claim 24 wherein the probe message includes the segment number of a recent UDP seg ment for which the ACK was received Aug 21 2008 0256 26 The method of claim 23 wherein a predeter mined probe retry count denotes the count of probe me
131. obile device user interface 0051 WANs Wide area networks a collection of com puters that are connection for electronic communications typically where the computers are further apart than a LAN and are connected by telephone lines fiber optic cables sat ellite transmission or radio waves 0052 WLAN Wireless local area network e g a tech nology that is used to connect devices including mobile devices laptops desktop computers entertainment equip ment etc through a wireless radio signal Examples include the known WiFi and WiMAX data communication standards 0053 Three modes of transporting an agent 0054 Real time Transport A first electronic device sends and Agent to a second electronic device Optionally the sec ond electronic device returns the Agent back to the first elec tronic device In either case the first electronic device s appli cation that sent the Agent waits for completion of the transport process before continuing execution 0055 Batch Transport An application on a first electronic device sends an Agent to a second electronic device The first electronic device s TXM module only tracks the state of the transmission of the Agent and not the execution The appli cation continues execution without waiting for status updates on the transport process 0056 Auto Transport An application on a first electronic device sends an Agent to an application on a second electronic device The TXM module wi
132. on level 3 Compres sion and encryption prior to transmission provides efficient and secure communications in both wired and wireless net works 4 The virtual session operates the same in wired networks as in wireless networks and reduces the overhead significantly for TXP2 enabled devices 5 Tests have shown that similar to wireless networks wired networks using TXP2 provide dramatically higher average data transmission rates compared with wired networks using TCP IP 0075 TXP2 supports any type of IP based communication network including wired networks wireless networks and satellite For example LAN WAN WLAN Wi Fi GPRS General Packet Radio Service CDMA Code Division Multiple Access GSM Global System for Mobile commu nications and satellite communication protocols among oth ers are supported TXP2 eliminates many problems associ ated with sending data over wired networks wireless networks or combination networks including among others latency packet loss packet mangling network node hand offs and IP address changes associated with the sending and receiving nodes during transmission of data TXP2 can typi cally be used for any IP based network and the improved efficiency and performance when compared with TCP IP based transport are especially significant when applied to both wired and wireless communications TXP2 Communication 0076 Turning again to FIG 1 the system 100 allows customers such as
133. on medium 0346 76 The method of claim 57 wherein a UDP from the at least one UDP segment comprises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data payload of predetermined size 0347 77 The method of claim 76 wherein the UDP type indicates a value selectable from UDP Segment UDP ACK UDP NAK and UDP Probe 0348 78 The method of claim 76 wherein the packet ID identifies the TXU packet to which the UDP segment is des ignated 0349 79 The method of claim 76 wherein the segment number indicates a sequential ordering of the UDP segment within the TXU packet 0350 80 The method of claim 76 wherein the last seg ment indicates the segment number corresponding to a final segment in the TXU packet 0351 81 The method of claim 57 further comprising the step of 0352 at the first computing device waiting a predeter mined probe time without receiving an ACK or a NAK prior to sending at least one probe message to the second computing device 0353 82 The method of claim 81 wherein the at least one probe message includes a segment number of a recent UDP segment for which the ACK was received 0354 83 The method of claim 81 wherein a predeter mined probe retry count denotes a count of the at least one probe message to send to the second computing device with out receiving the ACK or the NAK before reporting an
134. orks 110 The agents 120 are constructed from any language that allows the status of agent transfer and agent US 2008 0198787 Al execution to be reported to the sending computer Addition ally communicating applications need only be concerned with the destination of the receiving application and the agents 120 being transferred independent of the IP network and port address of the destination application A communi cating application uses a session identifier for keeping track of the communication information relating to the agent 120 0085 As shown in FIG 1 an agent 120 at time t is initially deconstructed into the UDP segments 128 that make up a frame The UDP segments 128 are sent from the mobile device 102 through the pipe 118 to the TXP2 server 134 The UDP segments 128 and thus the agent 120 are received at the server 134 at a later time t After performing its task the agent 120 is returned to the mobile device 102 at a still later time t The agent 120 can be viewed as having the capability to transport itself based on the transaction 0086 The mobile device 102 may use a variety of wireless technologies including Wi Fi GPRS based telemetry and satellite communication protocols to communicate with the TXP2 server 134 Further the communications can switch or be switched seamlessly from one channel of communication to another It should be noted that since both the mobile intensive code 112 and the server intensive code
135. ose or special purpose computer or a mobile device 0058 When information is transferred or provided over a network or another communications connection either hard wired wireless or a combination of hardwired or wireless to a computer the computer properly views the connection as a computer readable medium Thus any such a connection is properly termed and considered a computer readable medium Combinations of the above should also be included within the scope of computer readable media Computer executable instructions comprise for example instructions and data which cause a general purpose computer special purpose computer or special purpose processing device such as a mobile device processor to perform one specific function or a group of functions 0059 Those skilled in the art will understand the features and aspects of a suitable computing environment in which aspects of the invention may be implemented Although not required some of the inventions are described in the general context of computer executable instructions such as program modules being executed by computers in networked environ ments Such program modules are often reflected and illus trated by flow charts sequence diagrams exemplary screen displays and other techniques used by those skilled in the art to communicate how to make and use such computer program modules Generally program modules include routines pro grams objects components data struc
136. ow for transmitting through the US 2008 0198787 Al 38 selectable communication medium wherein the at least one window includes a predetermined number of UDP segments from the plurality of UDP segments and sending the at least one window to the second module space at the second computing device receiving the agent into the second module space the receiving comprising receiving UDP segments from the plurality of UDP segments assembling the UDP segments to recreate a TXU packet upon determination that at least one UDP segment from the plurality of UDP segments was not Aug 21 2008 received sending a NAK message to the first mod ule space the NAK message specifying a segment number for each missing UDP segment and upon determination that a final UDP segment for the TXU packet has been received sending an ACK message to the first computing device at the first module space upon receiving a NAK message retransmitting missing UDP segments to the second module space and at the second module space upon determination that a final TXU packet for the frame has been assembled recreating the frame for the agent by reassembling the plurality of TXU packets and executing the task
137. ow from the remote electronic device to the server at the remote elec tronic device upon receipt of the NAK message retransmit ting missing UDP segments to the server comprising iden tifying missing UDP segments according to the NAK message grouping the missing UDP segments into a retrans mit window having a number of UDP segments correspond ing to a count of missing UDP segments and sending the retransmit window to the server and at the server upon determination that a final TXU packet for the frame has been received recreating the frame by reassembling the plurality of TXU packets 0014 Another embodiment provides a method for data communication between a first computing device and a sec ond computing device comprising at the first computing device transmitting data through a selectable communication medium to the second computing device comprising con structing a frame for the data dividing the frame into TXU packets dividing each TXU packet into UDP segments grouping the UDP segments into at least one window wherein the window includes a predetermined number of UDP segments from the UDP segments and sending the window to the second computing device at the second com puting device receiving the data through the selectable com munication medium from the first computing device com prising receiving a UDP segment assembling the UDP segments to recreate a TXU packet upon determination that a last UDP segment for
138. ow includes a predeter mined number of UDP segments from the plu rality of UDP segments and 0748 sending the at least one window to the second computing device 0749 at the second computing device receiving the agent data through the selectable communication medium from the first computing device the receiv ing comprising 0750 receiving at least one UDP segment 0751 assembling UDP segments to recreate a TXU packet 0752 upon determination that at least one UDP segment was not received sending a NAK message to the first computing device the NAK message specifying as missing the at least one UDP seg ment and 0753 upon determination that a final UDP seg ment for the TXU packet has been received send ing an ACK message to the first computing device 0754 at the first computing device upon receiving the NAK message retransmitting the at least one UDP segment to the second computing device and 0755 atthe second computing device upon determi nation that a final TXU packet for the frame has been assembled recreating the frame for the agent data by reassembling the plurality of TXU packets 0756 performing the second task 0757 314 The method of claim 313 wherein the select able communication medium is a wireless network 0758 315 The method of claim 314 wherein the select able communication medium includes one or more of a Wi Fi network a GPRS General Packet Radio Service network a CDMA Co
139. prises space information for transport and execution of the agent Aug 21 2008 upon determination that a task is required determining whether task resources are available at the first comput ing device upon determination that the task resources are unavailable at the first computing device transporting the agent to a second computing device the transporting comprising allocating a session between the first module space on the first computing device and a second module space on the second computing device opening a pipe through the session the pipe having full duplex capability and transmitting the agent through the pipe to the second module space wherein the agent is transmitted by the first module space through a selectable communica tion medium to the second module space at the second computing device receiving the agent into the second module space and executing the task 68 The method of claim 67 wherein the selectable com munication medium is a wireless network 69 The method of claim 68 wherein the selectable com munication medium includes one or more ofa Wi Fi network a GPRS General Packet Radio Service network a COMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 70 The method of claim 69 further comprising switching to a different selectable communication medium during transmission of the agent 71 The method of c
140. puting device the NAK message specify ing as missing the at least one UDP segment and upon determination that a final UDP segment for the TXU packet has been received sending an ACK message to the first computing device at the first computing device upon receiving the NAK message retransmitting the at least one UDP segment to the second computing device and at the second computing device upon determination that a final TXU packet for the frame has been assembled recreating the frame for the agent data by reassem bling the plurality of TXU packets performing the second task 52 The method of claim 51 wherein the selectable com munication medium is a wireless network 53 The method of claim 52 wherein the selectable com munication medium includes one or more ofa Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 54 The method of claim 53 further comprising switching to a different selectable communication media during transmission of the agent 55 The method of claim 53 further comprising switching to a different selectable communication media during reception of the agent 56 The method of claim 51 wherein the space information comprises a version ID a session ID a user ID a device ID an encryption key an IP address an IP port number a status an agent list a frame
141. r is not transparent to TCP since recov ery of lost data introduces delay Wireless networks have a long delay compared to wired networks since transmission over a radio interface is slower than transmission over a wired medium Additional delay may be introduced due to process ing on a physical layer and on a data link layer In cellular networks processing on the physical layer error correction and interleaving is extensive and therefore produces a rela tively long delay On the data link layer delay is increased by the use of MAC and ARQ This delay is variable since it depends on other users activity MAC and on the radio conditions ARQ The delay variation experienced by TCP may become very large if the link layer ARQ is highly per sistent as in GSM GPRS and CDMA 0009 The performance of TCP is generally lower in wire less networks than in fixed networks TCP is unable to distin guish problems that typically occur in wireless networks from the problems caused by network congestion Although con gestion control algorithms in TCP may be used to reduce the effects of the congestion the congestion control algorithms are based on the assumptions that data is lost mainly due to congestion and that data loss due to transmission errors is rare However this assumption is no longer true for a wireless communication network TCP segments may be lost if the radio conditions are poor and the link layer protocol provides a low relia
142. r more of a Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 0539 190 The method of claim 189 further comprising the step of 0540 switching to a different selectable communica tion media during reception of the data 0541 191 The method of claim 187 wherein the agent typeisaone byte field indicating a value selectable from real time batch and auto 0542 192 The method of claim 187 wherein the agent name is a 40 byte field and contains a name of an object wherein the object includes the data and executable code 0543 193 The method of claim 187 wherein the data length is a 4 byte field indicating the size in bytes of the data buffer 0544 194 The method of claim 187 wherein the data buffer is a variable size buffer containing the data to be trans mitted 0545 195 The method of claim 187 wherein the packet type is a one byte field indicating a value for the packet type 0546 196 The method of claim 187 wherein the session ID is a 4 byte field identifying a destination 0547 197 The method of claim 196 wherein the pipe number is a 4 byte field identifying a connection to the des tination 0548 198 The method of claim 187 wherein the packet length is a 2 byte field indicating the size in bytes ofthe packet data 0549 199 The method of claim 187 wherein
143. responding to the data length 0390 91 The system of claim 90 wherein the agent type indicates a value selectable from real time batch and auto 0391 92 The system of claim 90 wherein the agent name contains a name of an object that includes agent data and executable code 0392 93 The system of claim 90 wherein the data length indicates a size for the data buffer 0393 94 The system of claim 90 wherein the data buffer is a variable size buffer containing the data to be transmitted 0394 95 Thesystem of claim 87 wherein the TXU packet comprises a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length 0395 96 The system of claim 95 wherein the packet type indicates a value for the packet type 0396 97 The system of claim 95 wherein the session ID identifies a destination entity 0397 98 The system of claim 97 wherein the pipe num ber identifies a connection to the destination entity 0398 99 The system of claim 95 wherein the packet length indicates a size for the packet data 0399 100 The system of claim 87 wherein the UDP segment comprises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data payload of predetermined size 0400 101 The system of claim 100
144. rk 0428 115 The method of claim 114 wherein the select able communication medium includes one or more of a Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 0429 116 The method of claim 115 further comprising the step of 0430 switching to a different selectable communica tion media during transmission of the data 0431 117 The method of claim 113 wherein the prede termined number of UDP segments for the at least one win dow is an optimized value corresponding to the selectable communication medium 0432 118 The method of claim 113 wherein the packet length is a predetermined value corresponding to the select able communication medium 0433 119 The method of claim 113 wherein a UDP segment length indicates the size of the UDP segment the UDP segment length having a value corresponding to the selectable communication medium 0434 120 The method of claim 113 wherein a window length equals the predetermined number of UDP segments the window length having a value corresponding to the select able communication medium 0435 121 The method of claim 113 wherein the agent type is a one byte field indicating a value selectable from realtime batch and auto 0436 122 The method of claim 113 wherein the agent name is a 40 byte field and contains a name of an object
145. s before continuing execution 0154 A value of batch signifies that the agent 120 is intended to be sent in batch mode An application on a com puter sends an agent 120 to a second computer The first computer s TXM 608 module tracks the state of the transmis sion but not the execution The application continues execu tion without waiting for status updates on the transport pro cess 0155 A value of auto signifies that the agent 120 is intended to be sent in real time but if the agent 120 failed to send due to network errors it is saved to the local database and sent at a later time An application on a computer sends an agent 120 to an application on a second computer The TXM 608 module determines whether real time mode is possible based on network conditions If real time mode is possible a real time transport begins and the sending application is noti fied Otherwise the TXM 608 begins a batch mode process and the sending application is notified Thus the application needs wait if real time mode is possible but not otherwise 0156 The OnGetAgentName function returns the name of the agent and contains up to 40 bytes 0157 The OnGetSendData Data Len Data Buffer func tion is called by TXP2 before sending an agent 120 The function returns a pointer to Data Len the number of bytes in the Data Buffer and a pointer to Data Buffer the buffer containing the data to be sent with the agent 0158 The OnPutSendDa
146. s space information for transport and execution of the agent 0794 upon determination that a task is required determining whether task resources are available at the first computing device 0795 upon determination that the task resources are unavailable transporting the agent to a second com puting device the transporting comprising 0796 allocating a session between the first module space and a second module space on the second computing device 0797 opening a pipe through the session the pipe having full duplex capability and 0798 transmitting the agent through the pipe to the second module space the transmitting comprising 0799 at the first module space transmitting the agent through a selectable communication medium to the second module space the trans mitting comprising constructing a frame for the agent dividing the frame into a plurality of TXU pack ets that collectively comprise a frame body dividing each TXU packet into a plurality of UDP segments grouping the plurality of UDP segments into at least one window for transmitting through the selectable communication medium wherein the at least one window includes a predetermined number of UDP segments from the plurality of UDP segments and sending the at least one window to the second module space 0800 at the second computing device 0801 receiving the agent into the second module space the receiving comprising 0802 receiving UDP segments
147. sage to the first computing device specifying a segment number for each missing UDP segment and upon determi nation that a final UDP segment for the TXU packet has been received sending an ACK message to the first computing device at the first computing device upon receiving the NAK message retransmitting at least one missing UDP segment to the second computing device and at the second computing device upon determination that a final TXU packet for the frame has been assembled recreating the frame for the agent data by reassembling the TXU packets and performing the second task 0020 Another embodiment provides a method for trans porting and executing agents having related tasks that enables the agents to execute portions of related tasks at different computing devices comprising at a first computing device receiving an agent into a first module space corre sponding to the agent wherein the first module space com prises space information for transport and execution of the agent upon determination that a first task is required deter mining whether first resources are available upon verifying availability of first resources performing the first task upon determination that a second task is required determining whether second task resources are available at the first com puting device upon determination that the second task resources are unavailable at the first computing device trans porting the agent to a second comput
148. scribed or shown are exemplary and other means of establishing communications over wide area networks or the Internet may be used 0065 Reference is now made in detail to the description of the embodiments of systems apparatus and methods for automatic mobile data object transmission over wireless communication networks using UDP and a two level protocol as illustrated in the drawings The invention may however be embodied in many different forms and should not be con strued as limited to the embodiments set forth herein rather these embodiments are intended to convey the scope of the invention to those skilled in the art Furthermore all examples given herein are intended to be non limiting TXP2 Overview 0066 FIG 1 is a high level overview of exemplary aspects ofasystem 100 for automatic mobile data object transmission over wireless communication networks using UDP and the TXP2 two level protocol The systems and methods described provide for communications between two or more computing devices over a selectable communication medium It should be noted that the system 100 typically uses a wireless net Aug 21 2008 work though it also works well using traditional wired net works Communications will typically involve a mobile device 102 such as a handheld computer for example with a server 134 at a base of operations Of course multiple mobile devices 102 and or multiple servers 134 or other computers can be utilized
149. selectable communication medium with the first computing device the second computing device comprising the second TXU module operable for receiving a UDP segment of the window through the selectable com munication medium from the first TXU module assembling the UDP segment to recreate the TXU packet upon determi nation that at least one UDP segment was not received send ing the NAK message through the selectable communication medium to the first TXU module specifying the missing UDP segment and upon determination that a final UDP segment for the TXU packet has been received sending the ACK message to the first TXU module sending the TXU packet to a second TXM module the second TXM module operable for receiving the TXU packet from the second TXU module upon determination that the TXU packet is a first TXU packet for a new frame creating the new frame upon determination that a final TXU packet for the new frame has been received recreating the new frame by reassembling the TXU packets that include the data and providing the data from the new frame to a second application 0018 Another embodiment provides a method for trans porting agents having related tasks that enables agents to perform tasks at separate computing devices comprising at a first computing device having an agent with a first executable code for a first task and a second executable code for a second task determining whether first resources are available at t
150. served bit and byte ordering and the transmission and error detection and correction of the bit stream High level protocols deal with the data formatting including the syntax of messages the terminal to computer dialogue character sets sequencing of messages etc 0045 TXM An application module that employs a frame transmission protocol ofthe same name to send and receive a variable sized block of data that contains the agent using the TXU module 0046 TXP2 database A storage facility to store state information locally on each communicating electronic device s storage medium 0047 TXU An application module that employs a packet transmission protocol of the same name that sends and receives fixed size data blocks that compose each frame US 2008 0198787 Al 0048 Virtual Session A communication process allowing multiple agents to be sent and received simultaneously to specified recipient applications regardless of the physical transmission layer and IP and port address changes of the communicating nodes 0049 Virtual Space An information object maintained on each computer or electronic device and containing informa tion necessary for constructing an agent and the execution context of the agent 0050 UI User Interface Typically means a software application with which a user interacts for purposes of enter ing information obtaining information or causing functions of an associated system to execute includes a m
151. smit window the retransmit win dow having a number of UDP segments correspond ing to a count of missing UDP segments and 0465 sending the retransmit window to the second computing device 0466 139 The method of claim 138 wherein the select able wireless communication medium includes one or more of a Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications net work and a satellite network 0467 140 The method of claim 138 further comprising the step of 0468 switching to a different selectable communica tion media during transmission of the data 0469 141 The method of claim 138 wherein the prede termined number of UDP segments for the at least one win dow is an optimized value corresponding to the selectable wireless communication medium 0470 142 The method of claim 138 wherein the packet length is a predetermined value corresponding to the select able wireless communication medium 0471 143 The method of claim 138 wherein a UDP segment length indicates a UDP segment size for the UDP segment the UDP segment size corresponding to the select able wireless communication medium 0472 144 The method of claim 138 wherein a window length equals the predetermined number of UDP segments the window length having a value corresponding to the select able wireless communication medium 0473 145 The method
152. ssages to send to the server without receiving the ACK or the NAK before reporting an error 0257 27 The method of claim 1 further comprising the step of 0258 at the server upon sending a NAK to the remote electronic device waiting a predetermined probe time without receiving the UDP segment before sending a probe message to the remote electronic device 0259 28 The method of claim 27 wherein the probe message is a type of the UDP segment 0260 29 The method of claim 28 wherein the probe message includes the segment number for the UDP segment most recently received 0261 30 The method of claim 28 wherein a predeter mined probe retry count denotes the count of probe messages to send to the remote electronic device without receiving the UDP segment before reporting an error 0262 31 A method for wireless data communication between a first computing device and a second computing device comprising steps of 0263 at the first computing device 0264 transmitting data through a selectable wireless communication medium to the second computing device the transmitting comprising 0265 constructing a frame for data the frame com prising a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corresponding to the data length 0266 dividing the frame into a plurality of TXU packets that collectively comprise
153. st service call at 10 15 A M and while traveling to a second service call scheduled for 1 00 P M a two hour drive from the first appointment the mobile device 102 receives a communication through the GPRS 106 communication medium from the server 134 advising of a schedule update The mobile device 102 sends an agent 120 to the server 134 to acquire the new scheduling information Upon arrival at the server 134 the agent 120 executes server intensive code 114 to access the new sched uling information from the database 136 and perform other server intensive operations 138 related to the new schedule The 1 00 P M service call has been canceled but another customer located somewhat more remote but in the same general area as the previously scheduled appointment has requested service The new appointment is scheduled for 1 30 P M and requires approximately the same travel time 0093 After acquiring service history and account infor mation from the database 136 for the newly scheduled service call the agent 120 is transported back to the mobile device 102 Upon arrival at the mobile device 102 the agent 120 updates and displays the new schedule information and the related customer account and product information The agent 120 then executes the mobile intensive code 112 and deter mines that the product service manual is needed for the newly scheduled appointment The agent 120 is then transported back to the server 134 to acquire the
154. t computing device and upon determination that at least one UDP segment from the plurality of UDP segments was not received sending a NAK message that specifies each missing segment to the first computing device at the first computing device upon receiving the ACK message if a next window from the at least one window remains to be sent sending the next window from the first computing device to the second computing device at the first computing device upon receiving a NAK mes sage retransmitting at least one missing UDP segment from the plurality of UDP segments to the second com puting device and at the second computing device upon determination that a final TXU packet for the frame has been received rec reating the frame by reassembling the plurality of TXU packets 3 A method for data communication between a remote electronic device and a server comprising steps of transmitting data from the remote electronic device through a selectable communication medium to the server the transmitting comprising constructing a frame for data the frame comprising a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corresponding to the data length dividing the frame into a plurality of TXU packets that collectively comprise the frame body wherein a TXU packet from the plurality of TXU packets comprises a packet header and a packet bod
155. t occurred during the transport process 0180 The error message contains the latest error message for any errors that occurred during the transport process Virtual Session 0181 A virtual session 116 is a communication context between the virtual spaces 604 of respective communicating computers across a selected communication medium The communication channel allows full duplex capability for agents 120 to transport between specified applications inde pendent of underlying IP and port address changes of the communicating nodes Applications on computers or other electronic devices may send and receive agents 120 over any IP based network simultaneously One virtual session 116 allows an application to communicate to any TXP2 enabled computers whereas TCP IP communications require two sockets for each pair of communicating computers 0182 The virtual session 116 maintains the communica tion context between virtual spaces 604 on different comput ers independently of the underlying physical network For example TXP2 can continue transmission of data from one computer to another while switching from a Wi Fi to a GPRS network and the IP address and port number changes that result 0183 TXP2 automatically notifies other communicating computes that its IP network and port have changed 0184 Each virtual session 116 can have multiple full duplex communication pipes 118 thus enabling an applica tion to send and receive data to any nu
156. t segment and the UDP body including a data payload of predetermined size upon determination that the segment number indicates a first UDP segment creating a TXU packet the TXU packet com prising a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length upon determination that the segment number indicates the UDP segment sequentially after the first UDP segment adding the UDP segment to the TXU packet upon determination that the segment number indicates an initial segment in a window prior to a final window initial segment for the TXU packet sending an ACK to the remote electronic device upon determination that the UDP segment was not received sending a NAK message to the remote electronic device the NAK message specifying the segment number for each missing segment upon deter mination that the segment number indicates the last segment verifying that all UDP segments have been received upon determination that all UDP segments have been received sending an ACK message to the remote electronic device upon determination that a final TXU packet has been received recreating a frame by reassembling a plurality of TXU packets the frame comprising a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buf
157. ta Data Len Data Buffer func tion is called by TXP2 after the agent has arrived at the destination TXP2 will pass in both Data Len and Data Buffer 0159 The OnArrived function is notifies that the agent 120 has arrived at the destination This function is called after OnPutSendData and processes the sent data 0160 The OnGetRetumData Data Len Data Buffer function is called before TXP2 returns the agent 120 if the agents was sent using real time mode The function returns Data Len a pointer to the number of bytes in the Data Buffer and also returns Data Buffer a pointer to a buffer containing the data to be returned with the agent 120 0161 The OnPutReturnData Data Len Data Buffer function is called after the agent 120 arrives at the destination The function passes in a pointer to Data Len the number of bytes in the Data Buffer and a pointer to Data Buffer the buffer containing the data to be sent with the agent which were obtained from the OnGetSendData function 0162 The OnReturned function notifies that the agent 120 has returned This function is called after the OnPutReturn Data function and contains logic to process the returned data Virtual Space 0163 A virtual space 604 at each computing device mo bile device 102 and TXP2 server 134 in FIG 6 provides execution context for mobile data communication objects such as agents to perform specified computing tasks The virtual space on a sending computing dev
158. the remote electronic device 19 The method of claim 18 wherein the probe message includes the segment number for the UDP segment most recently received 20 The method of claim 18 wherein a predetermined probe retry count denotes a count of probe messages to send to the remote electronic device without receiving the UDP segment before reporting an error 21 A system for data communication between multiple computing devices the system comprising a first computing device configured for communication through a selectable communication medium with a sec ond computing device the first computing device com prising a first TXM module operable for receiving the data from a first application constructing a frame for the data dividing the frame into a plurality of TXU packets that collectively comprise a frame body sending a TXU packet from the plurality of TXU packets to a first TXU module and upon receiving notification that the TXU packet has been sent successfully if a next TXU packet from the plurality of TXU packets remains to be sent sending the next TXU packet to the first TXU mod ule the first TXU module operable for receiving the TXU packet from the first TXM module dividing the TXU packet into a plurality of UDP seg ments Aug 21 2008 grouping the plurality of UDP segments into at least one window wherein the at least one window includes a predetermined number of UDP seg ments from the plurality of UDP s
159. the customer history has already been acquired previously then it may be displayed for the technician However if the product schematic diagram is not available within the mobile device then an agent 120 will be sent toa TXP2 server 134 to retrieve it from a database 136 0150 Programming considerations consider the decisions as to availability of resources and communication media for performing the task at hand The agent 120 contains the entirety of executable code for performing such tasks as dis playing file data on the handheld and retrieving the file data from a database However the entirety of functionality cannot be performed in all locations where the agent 120 may be located For example if an agent 120 is operating on a mobile device 102 and reaches a point in the code where the product schematic diagram must be retrieved from a database a deter mination is made that the database retrieval code is server intensive 114 code and the agent must transport to the server 134 to retrieve the file If network connectivity is available then the agent 120 transports to the server 134 acquires the file and returns to the handheld 0151 Insome instances network connectivity may not be available whether due to network outages or cost consider ations for the price of certain types of connections In those circumstances the agent 120 either executes other function ality while monitoring for connectivity to complete the pre vious t
160. the first TXU module the NAK message specifying the at least one missing UDP segment that corresponds to the at least one differ ent UDP segment and Aug 21 2008 0379 upon determination that a final UDP seg ment for the TXU packet has been received 0380 sending the ACK message to the first TXU module 0381 sending the TXU packet to a second TXM module 0382 the second TXM module operable for 0383 receiving the TXU packet from the second TXU module 0384 upon determination that the TXU packet is a first TXU packet for a new frame creating the new frame 0385 upon determination that a final TXU packet for the new frame has been received recreating the new frame by reassembling the plurality of TXU packets that include the data and 0386 providing the data from the new frame to a second application 0387 88 The system of claim 87 wherein the selectable communication medium is a wireless network 0388 89 The system of claim 88 wherein the selectable communication medium includes one or more of a Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 0389 90 The system of claim 87 wherein the frame com prises a frame header and the frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer cor
161. the frame body wherein a TXU packet from the plurality of TXU packets comprises a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length 0267 dividing the TXU packet into a plurality of UDP segments wherein a UDP segment from the plurality of UDP segments comprises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data payload of prede termined size 0268 grouping the plurality of UDP segments into at least one window for transmission through the select able wireless communication medium wherein the at least one window includes a predetermined number of UDP segments and 0269 sending the at least one window to the second computing device 0270 at the second computing device receiving the data through the selectable wireless communication medium from the first computing device the receiving comprising 0271 receiving at least one UDP segment 0272 assembling UDP segments to recreate the TXU packet 0273 upon determination that a final UDP segment for the TXU packet has been received sending an ACK message to the first computing device US 2008 0198787 Al 0274 upon determination that at least one UDP seg ment was not received sending a NAK message to the first computin
162. the frame header including an agent type an agent name and a data length and the frame body including a data buffer corresponding to the data length Aug 21 2008 0336 66 The method of claim 65 wherein the agent type indicates a value selectable from realtime batch and auto 0337 67 The method ofclaim 65 wherein the agent name contains a name of an object that includes the data and execut able code 0338 68 The method of claim 65 wherein the data length indicates a size in bytes of the data buffer 0339 69 The method of claim 65 wherein the data buffer is a variable size buffer containing the data to be transmitted 0340 70 The method of claim 57 wherein each TXU packet comprises a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length 0341 71 The method ofclaim 70 wherein the packet type indicates a value for the packet type 0342 72 The method of claim 70 wherein the session ID identifies a destination entity 0343 73 The method of claim 72 wherein the pipe num ber identifies a connection to the destination entity 0344 74 The method of claim 70 wherein the packet length indicates a size in bytes of the packet data 0345 75 The method of claim 70 wherein the packet length is a predetermined value corresponding to the select able communicati
163. ther the UDP segment 128 is the first segment in a window If the UDP segment 128 is the first UDP segment 128 in a window then a determination is made at step 542 whether it is also the first UDP segment 128 in the final window of a TXU packet 126 If the first UDP segment 128 is the first UDP segment 128 in the final window of a TXU packet 126 then no ACK 302 is sent by the receiving computing device However if the UDP segment 128 is the first UDP segment 128 of a window prior to the final window then an ACK 302 is sent by the receiving computing device ACKs 302 are sent after the first UDP segment 128 of each window except the final window of a TXU packet 126 In either event at step 546 a determination is made whether the UDP segment 128 is the last segment 248 of a TXU packet 126 The determination whether the UDP US 2008 0198787 Al segment 128 is the final segment of a TXU packet 126 is made by comparing the segment number 246 against the last seg ment 248 value 0135 Ifthe received UDP segment 128 is the final UDP segment 128 of a TXU packet 128 then a determination is made whether the TXU packet 126 is complete at step 554 If all UDP segments 128 for the TXU packet 126 have been received then an ACK 302 is transmitted to the sending computing device at step 556 Ifall UDP segments 128 for the TXU packet 126 have not been received then processing continues by checking for missing UDP segments 128 at step 548 0136 Onc
164. tures etc that perform particular tasks or implement particular abstract data types within the computer Computer executable instructions associated data structures and program modules represent examples of the program code for executing steps of the methods disclosed herein The particular sequence of such executable instructions or associated data structures represent examples of corresponding acts for implementing the func tions described in such steps 0060 Those skilled in the art will also appreciate that the invention may be practiced in network computing environ ments with many types of computer system configurations including personal computers hand held devices multi pro cessor systems microprocessor based or programmable con sumer electronics networked PCs minicomputers main frame computers and the like The invention may also be practiced in distributed computing environments where tasks are performed by local and remote processing devices that are linked either by hardwired links wireless links or by a combination of hardwired or wireless links through a com munications network In a distributed computing environ ment program modules may be located in both local and remote memory storage devices 0061 An exemplary system for implementing the inven tions which is not illustrated includes a general purpose computing device in the form of a conventional computer including a processing unit a system memory
165. ugh a pipe 118 in the virtual session 116 0141 The UDP protocol 6125 at the TXP2 server 134 receives UDP segments 128 through a pipe 118 within the virtual session 116 The OCP 6065 assembles the UDP seg ments 128 into TXU packets 126 to recreate the frame 124 and reconstruct the agent 120 within the virtual space 604 at the TXP2 server 134 0142 The object communication protocol 606 uses a dual protocol technology and includes two protocols TXM 608 and TXU 610 for transmitting agents over the selected com munications networks TXM 608 is a universal application protocol Whereas TCP IP requires applications to provide application methods for managing the communication pro cess the TXM 608 protocol unburdens applications from managing an application protocol and improves overall com munication efficiency and performance The improved effi ciency and performance is especially significant when applied to both wired and wireless communications 0143 The TXM 608a deconstructs the agent 120 into a frame 124 subdivides the frame into multiple TXU packets 126 and hands off the TXU packets to the TXU 610 one packet at a time The TXM 608a also constructs a virtual session 116 with the TXM 608b running on the TXP2 server 134 and allocates a pipe 118 within the virtual session 116 After the frame 124 is sent the pipe 118 is closed 0144 Additionally the TXM has the ability to probe the agent periodically to check the status of the
166. upon determination that a final UDP segment from the UDP segments for the TXU packet has been received sending an ACK message to the first com puting device 0697 at the first computing device upon receiving the NAK message 0698 retransmitting at least one missing UDP seg ment to the second computing device and Aug 21 2008 0699 at the second computing device upon determina tion that a final TXU packet for the frame has been assembled 0700 recreating the frame for the agent data by reas sembling the plurality of TXU packets and 0701 performing the second task 0702 284 The method of claim 283 wherein the select able communication medium is a wireless network 0703 285 The method of claim 284 wherein the select able communication medium includes one or more of a Wi Fi network a GPRS General Packet Radio Service network a CDMA Code Division Multiple Access network a GSM Global System for Mobile communications network and a satellite network 0704 286 The method of claim 285 further comprising 0705 switching the selectable communication medium during transmission of the agent data 0706 287 The method of claim 285 further comprising 0707 switching the selectable communication medium during reception of the agent data 0708 288 The method of claim 283 wherein the prede termined number of UDP segments for the at least one win dow is an optimized value corresponding to the s
167. urality of TXU packets comprises a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length 0457 dividing the TXU packet into a plurality of UDP segments wherein a UDP segment from the plurality of UDP segments comprises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data payload of prede termined size 0458 grouping the plurality of UDP segments into at least one window for transmission through the select Aug 21 2008 able wireless communication medium wherein the at least one window includes a predetermined number of UDP segments and 0459 sending the at least one window to the second computing device 0460 upon receiving an ACK message from the second computing device ifa next window from the at least one window remains to be sent sending the next window from the first computing device to the second computing device 0461 upon receipt ofa NAK message specifying miss ing UDP segments 0462 retransmitting missing UDP segments from the first computing device to the second computing device the retransmitting comprising 0463 identifying a plurality of missing UDP seg ments according to a NAK message 0464 grouping the plurality of missing UDP seg ments into a retran
168. variations are possible in light of the above teachings OTHER ASPECTS OF THE INVENTIONS 0206 The following are additional aspects and statements of the inventions 0207 Aspect 1 Communication Methods and Systems for data communication between multiple computing devices 0208 1 A method for data communication between a remote electronic device and a server comprising steps of 0209 at the remote electronic device 0210 transmitting data through a selectable communi cation medium to the server further comprising 0211 constructing a frame for data the frame com prising a frame header and a frame body the frame header including an agent type an agent name and a data length and the frame body including a data buffer corresponding to the data length 0212 dividing the frame into a plurality of TXU packets that collectively comprise the frame body wherein a TXU packet from the plurality of TXU packets comprises a packet header and a packet body the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length 0213 dividing the TXU packet into a plurality of UDP segments wherein a UDP segment from the Aug 21 2008 plurality of UDP segments comprises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data payloa
169. y the packet header including a packet type a session ID a pipe number and a packet length and the packet body including packet data corresponding to the packet length dividing the TXU packet into a plurality of UDP seg ments wherein a UDP segment from the plurality of UDP segments comprises a UDP header and a UDP body the UDP header including a UDP type a packet ID a segment number a last segment and the UDP body including a data payload of predetermined size grouping the plurality of UDP segments into at least one window for transmission through the selectable com munication medium wherein the at least one window includes a predetermined number of UDP segments from the plurality of UDP segments and sending the at least one window to the server upon receiving an ACK message from the server if a next window from the atleast one window remains to be sent sending the next window from the remote electronic device to the server upon receipt of a NAK message retransmitting missing UDP segments from the remote electronic device to the server the retransmitting com prising identifying a plurality of missing UDP segments accord ing to the NAK message Aug 21 2008 grouping the plurality of missing UDP segments into a retransmit window the retransmit window having a number of UDP segments corresponding to a count of missing UDP segments and sending the retransmit window to the server 4 The method of claim 3 wherein
170. ying missing segments the first com puting device upon receiving the ACK message sending the next window and upon receiving a NAK message retrans mitting missing UDP segments and at the second computing device upon receiving a final TXU packet for a frame rec reating the frame by reassembling the TXU packets Probe 15 2007 messages are sent for missing ACKs and NAKs zr er e Multiple Plural Communication Media porn 0277454 ji we p E I c Mes GPRS CDMA Sate Ret I Geier 106 Code Mobile Server di2 144 l I l I N Agent 120 Mobile EN Device V k Mobile Intensive Intensive 102 Ot SET UDP 128 End User UDP 128 O Applications e g Confirmed Oooo UDP 128 Delivery 4 A Qt Fane e Database 136 Agent 120 t2 Sg Delivery Ordor Entry System Field Service Order Entry e feck I l I I I I i Agent 120 l l I l yum x Server Intensive Operation N 138 TXU Packets 126c J e g Service Histo pet ae EN ER VCA noh A CO OGOOCO OOOOGOO Reine UDP segment Schedule N End User OO Application Data Be Histo User s Manual 132 Account Info Schedule Automatic mobile data object transmission over wireless communication networks using UDP and

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