Portable internet browser device with cordless phone module and
Contents
1. 130 FIG 4 U S Patent Oct 4 2005 Sheet 3 of 3 US 6 952 414 1 INCOMING CALL 545 DETECT SEPARATION OF USER CONTROL MODULE 120 END CALL ATTACH UNIT 930 0 6 952 414 1 1 PORTABLE INTERNET BROWSER DEVICE WITH CORDLESS PHONE MODULE AND METHOD OF OPERATION TECHNICAL FIELD OF THE INVENTION The present invention is generally directed to handheld computers and similar personal digital assistant PDA devices and more specifically to a portable Internet browser device that incorporates a cordless phone module BACKGROUND OF THE INVENTION The personal computer PC has become ubiquitous in society Personal computers are used in the home and in the office for a variety of purposes one of the most important of which is accessing the Internet A personal computer may be used to browse web sites and to send and to receive e mail The average price of a personal computer has fallen to the point where it is affordable to most of the population which further increases the importance of Internet applications Despite the popularity of the personal computer it is expected that future Internet development will focus on non PC devices that are capable of accessing the Internet These web enabled devices include many conventional appliances e g stereos refrigerators and the like that may access the Internet for any number of purposes such as notifying the manufacturer of a malfun2. If the user launches the phone call application in order to make an outgoing call microcontroller 432 prompts the user to enter the phone number on display screen 110 or keypad 160 process step 545 Once the number is entered the user may cause the number to be dialed by separating user control module from display module 105 an action that is detected by sensor 420 Sensor 420 then notifies microcontroller 432 of the separation process step 520 Next microcontroller 432 transmits special purpose IP packet 300 to base station 200 to establish a low latency voice telephony connection between base station 200 and user control module 120 Microcontroller 432 then transmits the dialed number to base station 200 and continues to execute the phone call application User control module 120 then functions as a cordless phone process step 525 As before the user may end the call by pressing a Hang Up button on control buttons 130 and reattaching user control module 120 to display module 105 process step 530 Microcontroller 432 then resumes executing the browser application from the same point where the user initiated the outgoing call In an alternate embodiment of PAD 100 user control module 120 and display module 105 may be a single integral unit rather than separate units In such an embodiment PAD 100 operates as a cordless speaker phone rather than as a cordless phone handset When the user dials a phone number or an incoming call
3. Internet to the PSTN Similarly a call may be answered when base station 100 transmits a call notification message to PAD 100 When user control module 120 detects the call notification message an audible indicator e g ring tone or a visible indicator e g message box alerts the user who may answer the call by separating user control module 120 from display module 105 Again when user control module 120 detects that it has been detached from display module 105 user control mod ule 120 stops operating in a web browser mode and begins operating in a cordless phone mode When user control module 120 is being used in cordless phone mode micro phone 140 detects the user s voice and speaker 150 plays the incoming voice signal to the user FIG 3 illustrates exemplary IP packet 300 transmitted from user control module 120 to base station 200 according to one embodiment of the present invention When a user is browsing the Internet IP packets are transmitted and received by PAD 100 and base station 200 in non real time That is there is neither a guaranteed maximum delay for IP packets nor a minimum transfer rate If a web site visited by a user is busy IP packets may be received by PAD 100 at a very slow rate and with a large delay If errors occur during transmission of IP packets from base station 200 to PAD 100 the corrupted IP packets are normally re trans mitted adding additional delay While high latency may be accept
4. RIGHT arrows END DELETE ESC TAB and the like A user browses the Internet and executes applications by maneuvering pointing device 125 and pressing control buttons 130 The user also may enter alphanumeric charac ters on telephone keypad 160 In an advantageous embodi ment of the present invention display screen 110 is a touch screen that allows the user to enter alphanumeric text by touching virtual buttons on an on screen QWERTY key board FIG 2 illustrates an Internet set up connection of exem plary modular PAD 100 and corresponding base station 200 according to one embodiment of the present invention Base station 200 may be connected to the Internet by any known technique including by cable modem by digital subscriber line DSL by conventional 56K analog modem to the public switched telephone system PSTN by fixed wireless connection and the like In an advantageous embodiment of the present invention base station 200 comprises recharging circuitry and a holding cradle allowing PAD 100 to be recharged when not in use When a user is browsing the Internet PAD 100 wirelessly transmits Internet protocol IP packets to base station 200 and receives IP packets from base station 200 PAD 100 and base station 200 may communicate using any conventional radio frequency RF access protocol including one or more of code division multiple access CDMA frequency divi sion multiple access FDMA and time division multiple acces
5. module and comprising a transceiver to wirelessly communicate with the base station and a controller to execute an Internet browser application so as to display web page content on the display screen of the display screen module communicate voice data with the base station via the transceiver and communicate a special purpose packet to the base station via the transceiver in response to a determination that the display screen module and the user control module are separated so as to establish a low latency connection for com municating packetized voice data the special purpose packet including an indicator that the base station is to give priority to packets having voice data communicated between the base station and the portable device 11 The system as in claim 10 wherein the voice data is communicated between the transceiver and the base station as one or more Internet protocol IP data packets 12 The system as in claim 11 wherein the controller and the base station establish a low latency connection for communicating the one or more IP data packets containing the voice data 13 The system as in claim 12 wherein the controller executes a voice over IP VoIP application to communicate the one or more IP data packets 14 The system as in claim 10 wherein the user control module further comprises a microphone for detecting the voice of a user and a speaker for transmitting an incoming voice signal to the user 15 The s
6. Definitions for certain words and phrases are provided throughout this patent document those of ordinary skill in the art should understand that in many if not most instances such definitions apply to prior as well as future uses of such defined words and phrases BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the present inven tion and the advantages thereof reference is now made to the following descriptions taken in conjunction with the accompanying drawings wherein like numbers designate like objects and in which FIG 1 illustrates an exemplary modular personal access device PAD according to one embodiment of the present invention FIG 2 illustrates an Internet set up connection of the exemplary modular PAD in FIG 1 and a corresponding base station according to one embodiment of the present inven tion FIG 3 illustrates an exemplary IP packet transmitted from the user control module to the base station according to one embodiment of the present invention FIG 4 illustrates an exemplary modular PAD in greater detail according to one embodiment of the present invention and FIG 5 is a flow diagram illustrating the operation of the exemplary modular PAD according to one embodiment of the present invention DETAILED DESCRIPTION OR THE INVENTION FIGS 1 through 5 discussed below and the various embodiments used to describe the principles of the present invention in this patent document are
7. United States Patent US006952414B1 12 10 Patent No US 6 952 414 1 Willig 45 Date of Patent Oct 4 2005 54 PORTABLE INTERNET BROWSER DEVICE 6 487 602 B1 11 2002 Thakker 709 230 WITH CORDLESS PHONE MODULE AND 6 587 433 B1 7 2003 Borella et al 370 230 METHOD OF OPERATION 6 757 551 B2 6 2004 Newman et al 455 556 1 2002 0022499 1 2 2002 Newman et al 455 556 75 Inventor Randy C Willig Fort Collins CO OTHER PUBLICATIONS US W Richard Stevens TCP IP Illustrated The Protocols 73 Assignee Advanced Micro Devices Inc 1994 Addison Wesley vol I pp 34 35 Sunnyvale CA US U S Appl No 09 443 024 filed Nov 1999 Newman et al Notice Subject to any disclaimer the term of this cited by examiner patent is extended or adjusted under 35 Primary Examiner Wellington Chin U S C 154 b by 812 days Assistant Examiner Mark A Mais 21 Appl No 09 669 709 57 ABSTRACT 22 Filed Sep 26 2000 There is disclosed personal access device PAD capable of 51 HO4L 12 50 browsing web sites an Internet protocol IP network and 52 U S 370 352 379 93 09 379 110 01 also capable of operating as cordless phone that provides 345 650 345 169 a conventional phone connection or a voice over IP phone 58 Field of Search 370 352 353 connection The personal access device compr
8. able for most web browsing functions a voice over IP telephony application requires real time delivery of IP packets containing voice data Therefore when user control module 120 is being used as a cordless phone IP packets must be exchanged with base station 200 at a guaranteed minimum bit rate and with a fixed maximum latency In one embodiment of the present invention when user control module 120 is separated from display module 105 user control module 120 transmits special purpose IP packet 300 to base station 200 to establish a voice telephony connection IP protocol defines a Type of Service TOS field that contains a Minimize Delay flag The Minimize Delay flag is used by routers and other devices to give priority to IP packets in which the Minimize Delay flag is set In FIG 3 the TOS field is represented by low latency bits 305 which may be used to minimize latency between user control module 120 and base station 200 The voice over IP telephony application sets the Mini mize Delay flag in low latency bits 305 in order to give priority to voice packets between user control module 120 and the Internet Corrupted voice IP packets may be dis carded thereafter However this is acceptable in a voice signal since corrupted IP packets only result in a very brief amount of static or in tolerable voice distortion FIG 4 illustrates in greater detail selected portions of display module 105 and user control module 120 in exem plary modu
9. alterations without departing from the spirit and scope of the invention in its broadest form What is claimed is 1 A portable device comprising a display screen module comprising a display screen and a user control module removably attached to the display screen module and comprising a transceiver to wirelessly communicate with a base station coupled to a network and a controller to execute an Internet browser application so as to display web page content on the display screen of the display screen module communicate voice data with the base station via the transceiver and communicate a special purpose packet to the base station via the transceiver in response to a deter mination that the display screen module and the user control module are separated so as to estab lish a low latency connection for communicating packetized voice data the special purpose packet including an indicator that the base station is to give priority to packets having voice data com municated between the base station and the por table device 2 The portable device as in claim 1 wherein the voice data is communicated between the transceiver and the base station as one or more Internet Protocol IP data packets 3 The portable device as in claim 2 wherein the control ler and the base station establish a low latency connection for communicating the one or more IP data packets contain ing the voice data 4 The portable device as in claim 3
10. by way of illustration only and should not be construed in any way to limit the scope of the invention Those skilled in the art will under stand that the principles of the present invention may be implemented in any suitably arranged web enabled personal access device PAD 10 15 20 25 30 35 40 45 50 55 60 65 4 FIG 1 illustrates exemplary modular personal access device PAD 100 according to one embodiment of the present invention PAD 100 comprises display module 105 and user control module 120 Display module 105 comprises display screen 110 and speakers 115a and 115b Internally user control module 120 comprises the necessary data processors and memory necessary to run applications e g browser and e mail that access the Internet As will be explained below in greater detail user control module 120 also comprises wireless transceiver circuitry that provides PAD 100 with an Internet cordless phone capability User control module 120 comprises pointing device 125 which may be for example a mouse type device or touch pad that enables a user to move a cursor on display screen 110 User control module 120 also comprises a plurality of control buttons 130 generally denoted by dotted line microphone 140 speaker 150 and optional telephone key pad 160 Control buttons 130 may include among others the following keys or buttons ENTER VOLUME UP DOWN Right Mouse Left Mouse UP DOWN arrows LEFT
11. ction downloading a software upgrade from the manufacturer transmitting owner warranty information to the manufacturer and the like Internet telephones may eventually replace conventional telephones as voice over IP technology becomes more fully developed Consumers will use a variety of different devices to surf the web Browser capability is being added to mobile phones personal digital assistant PDA devices and elec tronic organizers such as the Palm VII organizer televi sions and the like More recently web enabled personal access devices PADs have become available These PADS are tablet sized web terminals that resemble stripped down laptop personal computers The PAD executes selected Internet related applications including a browser program and an e mail program The PAD user interface typically is an LCD touch screen a mouse like pointing device e g a scroll pad and a software keyboard operated by the touch screen The PAD may communicate by wireline or wirelessly with the Internet In a wireless environment the PAD communicates wirelessly with a base station that is connected by wireline to the public switched telephone network or to a proprietary local area network LAN A wireless PAD allows the user to move around the home or office while browsing the Internet The base sation may be incorporated in a cradle that normally holds and recharges the PAD when it is not in use An example of a web enabled
12. he base station via the transceiver in response to a determination that the display screen module and the user control module are separated so as to establish a low latency connection for communicating pack etized voice data the special purpose packet includ ing an indicator that the base station is to give priority to packets having voice data communicated between the base station and the portable device 23 The portable device as in claim 22 wherein the user control module further comprises means for terminating the low latency connection in response to a determination that the display screen module and the user control module are reattached 24 The portable device as in claim 22 wherein the indicator includes a minimize delay flag
13. is received the launching of the phone application automatically causes the transmission of special purpose IP packet 300 to base station 200 thereby estab lishing a low latency voice telephony connection between base station 200 and PAD 100 Thereafter the user simply speaks out loud and uses PAD 100 in speaker phone mode Advantageously if PAD 100 is a single integral unit tele phone keypad 160 may be omitted since all manual user inputs may be received from a touch screen on display 110 In an alternate embodiment of PAD 100 user control module 120 may operate as a conventional cordless phone over the public switched telephone network PSTN rather than as an Internet telephone executing a voice over IP application This may be accomplished by connecting base 10 15 20 25 30 35 40 45 50 55 60 65 8 station 200 to the PSTN as well as to the Internet When an incoming call is received or the user dials a phone number user control module 120 ceases execution of the browser application and base station 200 establishes a conventional call connection ot the central office of the PSTN Thereafter user control module 120 and base station 200 may exchange voice data according to any conventional protocol not necessarily in the form of IP data packets Although the present invention has been described in detail those skilled in the art will understand that they can make various changes substitutions and
14. ises 1 a radio 370 354 355 379 88 11 90 01 90 02 92 04 frequency RF transceiver for wirelessly communicating 379 93 05 100 05 100 15 93 09 102 02 with a base station coupled to the IP network wherein the 379 110 01 201 04 345 650 168 169 179 182 transceiver transmits IP data packets to base station 345 520 1 1 2 1 and receives IP data packets from the base station and 2 a PAD controller for executing an Internet browser application 56 References Cited and displaying web pages associated with the web sites on U S PATENT DOCUMENTS 5 983 073 A 11 1999 6 112 099 A 8 2000 455 466 6 359 892 B1 3 2002 370 401 6 418 146 B1 7 2002 ae 370 400 6 477 565 B1 11 2002 Daswani et 709 217 a display screen of the personal access device The PAD controller is also capable of transmitting voice data to and receiving voice data from the base station via the RF transceiver 24 Claims 3 Drawing Sheets EXECUTE BROWSER APPLICATION 7 DETECT SEPARATION OF USER CONTROL MODULE 120 EXECUTE PHONE CALL APPLICATION END CALL ATTACH UNIT 510 525 530 U S Patent Oct 4 2005 Sheet 1 of 3 US 6 952 414 1 110 105 120 115a 115b 100 FIG 1 TO FROM STATION INTERNET 200 FIG 2 300 305 LOW LATENCY BITS FIG U S Patent Oct 4 2005 Sheet 2 of 3 US 6 952 414 1 105 120 432 MEMORY 434
15. lar PAD 100 according to one embodiment of the present invention Display module 105 comprises interface connector 405 that mates with interface connector 410 in user control module 120 When display module 105 and user control module 120 are connected an electrical short created by jumper 415 between pins in interface connector 405 is detected by sensor 420 in user control module 120 When display module 105 and user control module 120 are dis connected sensor 420 detects an open circuit condition 10 15 20 25 30 35 40 45 50 55 60 65 6 instead Sensor 420 generates an output signal that indicates whether or not user control module 120 and display module 105 are connected User control module 120 comprises sensor 420 audio video interface IF 425 user input IF 430 microcontroller 432 memory 434 user input IF 440 transmission process ing circuitry 450 receiver processing circuitry 455 radio frequency RF transceiver X CVR 460 all of which are coupled together by and communicate via communication bus 480 When a user is browsing the Internet microcon troller 432 transmits video and audio signals associated with the web browser application to display module 105 via audio video IF 425 Similarly user inputs from the touch screen are transmitted from display screen 110 to microcon troller 432 via user input IF 430 Memory 434 stores application programs executed by microcontroller 432 and da
16. personal access device PAD is the Geode WebPAD system from National Semiconductor Corporation While the different types of web enabled devices are intended to offer cheaper more user friendly access to the Internet than a conventional personal computer many cost savings are not realized because of the redundancy in hardware or software functions of these web enabled devices For example PAD such as Geode Web PAD system and a Palm VII organizer both contain an LCD screen and a wireless transceiver Additionally much of the software in these devices also is redundant Moreover PADs and electronic organizers do not provide the function ality of a telephone so that a consumer must still own a 10 15 20 25 30 35 40 45 50 55 60 65 2 separate Internet telephone in order to use the Internet for phone service This further adds to the consumer s equip ment costs There is therefore a need in the art for improved web enabled devices that allow a user to access the Internet for a wide variety of applications In particular there is a need for a web enabled personal access device PAD that is capable of browsing Internet web sites and capable of operating as an Internet telephone SUMMARY OF THE INVENTION To address the above discussed deficiencies of the prior art it is a primary object of the present invention to provide a personal access device PAD capable of browsing web si
17. present invention the personal access device further comprises a microphone for detecting the voice of a user and a speaker for transmitting an incoming voice signal to the user In another embodiment of the present invention the personal access device comprises a display screen module capable of housing the display screen and a user control module removably attached to the display screen module wherein the RF transceiver and the PAD controller are disposed in the user control module In still another embodiment of the present invention the microphone and the speaker are disposed in the user control module In yet another embodiment of the present invention the PAD controller is capable of determining when the user control module and the display screen module are separated In a further embodiment of the present invention the PAD controller in response to a determination that the user control module and the display screen module are separated establishes a low latency connection to the base station for transmitting and receiving the voice data The foregoing has outlined rather broadly the features and technical advantages of the present invention so that those skilled in the art may better understand the detailed descrip tion of the invention that follows Additional features and 0 6 952 414 1 3 advantages of invention will be described hereinafter that form the subject of the claims of the invention Those skilled in
18. s TDMA or any combination of such protocols conventional cordless phone comprises a handset and base station both of which contain RF transceivers that communicate voice signals wirelessly thereby permitting a person to move freely around the home or office Advanta geously the RF transceiver circuitry found in PAD 100 and base station 200 are similar to the RF transceiver circuitry found in the handset and base station of a cordless phone The present invention capitalizes on these similarities by allowing a person to make and to receive telephone calls via user control module 120 which functions as a cordless phone handset may initiate a telephone call by entering a number on optional telephone keypad 160 If telephone keypad 160 is not implemented in user control module 120 the user may enter the number using the touch screen capability of display screen 110 In an advantageous embodiment of the present invention when the user has entered the number the call may be initiated by separating user control module 120 from display module 105 When user control module 120 0 6 952 414 1 5 detects that it has been detached from display module 105 user control module 120 stops operating in a web browser mode and begins operating in a cordless phone mode The entered number is dialed out to the PSTN by base station 200 Alternatively in a voice over IP application base station 200 initiates a phone call via the
19. signal indicating that an incoming phone call is being received process step 510 Microcontroller 432 also monitors user inputs from user input IF 430 and or user input IF 440 to determine if the user is launching a phone call application that initiates an outgoing call process step 540 If a message from base station 200 indicates that an incoming call is being received microcontroller 432 alerts the user by means of an audible indicator e g a ringing tone and or a visual indicator e g a dialog box on display screen 110 process step 515 To answer the call the user may launch the phone call application by separating user control module from display module 105 an action that is detected by sensor 420 Sensor 420 then notifies microcon troller 432 of the separation process step 520 Next microcontroller 432 transmits special purpose IP packet 300 to base station 200 to establish a low latency voice telephony connection between base station 200 and user control mod ule 120 Microcontroller 432 then executes the phone call application and user control module 120 functions as a cordless phone process step 525 At some point the user ends the call such as by pressing a Hang Up button on control buttons 130 and reattaches user control module 120 to display module 105 process step 530 At that point microcontroller 432 may resume executing the browser application from the same point where the incoming call was received
20. sing IP packets containing voice data The IP packets are sent to receiver processing circuitry 455 and speaker 150 During an Internet browser application RF transceiver 460 demodulates IP packets received from base station 200 and transmits the IP packets to microcontroller 432 Micro controller 432 extracts web page data associated with the browser application from the IP packets and transmits it to display module 105 via audio video IF 425 Similarly microcontroller 432 may receive user input data and com mands associated with the browser application from user input IF 440 e g keypad inputs mouse inputs or from user input IF 430 e g touch screen inputs Microcontroller then converts the user input data and commands to IP packet format and transmits the IP packets as a baseband signal to RF transceiver 460 RF transceiver 460 modulates the IP packets to produce an RF signal that is transmitted to base station 200 FIG 5 depicts flow diagram 500 which illustrates the operation of exemplary modular PAD 100 according to one embodiment of the present invention Initially user control module 210 and display module 105 are connected together and PAD 100 executes a browser application under the control of user inputs process step 505 As the browser application is executed microcontroller 432 continually 0 6 952 414 1 7 monitors incoming IP packets from RF transceiver 460 to determine if base station 200 has transmitted a
21. ta used by the application pro grams Memory 432 may be any conventional memory including static random access memory RAM dynamic RAM and flash RAM Microcontroller 432 may include any conventional data processor including an x86 based micro processor User input IF 440 receives user manual inputs from optional telephone keypad 160 pointing device mouse 125 and control buttons 130 Transmission processing circuitry 450 comprises a voice processor such as a digital signal processor DSP capable of receiving an analog voice signal from microphone MIC 140 and converting it to a sequence of IP data packets containing digital voice data These functions may also be accomplished by a microprocessor using medium access control MAC protocol Receiver processing circuitry 455 comprises a voice processor e g a DSP capable of receiv ing a sequence of IP data packets containing digital voice data and converting the digital voice data to an analog voice signal that is transmitted to speaker SPKR 150 During a voice over IP telephony application radio fre quency RF transceiver 460 receives IP packets containing voice data as a baseband signal from transmission process ing circuitry 450 RF transceiver 460 then modulates the baseband signal to an RF signal that is transmitted to base station 200 RF transceiver 460 receives incoming RF sig nals from base station 200 and demodulates the incoming RF signal to a baseband signal compri
22. tes on an Internet protocol IP network and also capable of operating as a cordless phone that provides a conventional phone connection and a voice over IP phone connection According to an advantageous embodiment of the present invention the personal access device comprises 1 a radio frequency RF transceiver capable of wirelessly communi cating with a base station coupled to the IP network wherein the RF transceiver transmits IP data packets to the base station and receives IP data packets from the base station and 2 a PAD controller capable of executing an Internet browser application and displaying web pages associated with the web sites on a display screen of the personal access device wherein the PAD controller is further capable of transmitting voice data to and receiving voice data from the base station via the RF transceiver According to one embodiment of the present invention the PAD controller transmits the voice data to and receives the voice data from the base station in Internet protocol IP data packets According to another embodiment of the present inven tion the PAD controller and the base station establish a low latency connection for transmitting and receiving the IP data packets containing the voice data According to still another embodiment of the present invention the PAD controller executes a voice over IP application capable of transmitting and receiving the IP data packets In one embodiment of the
23. the art should appreciate that they may readily use the conception and the specific embodiment disclosed as a basis for modifying or designing other structures for carry ing out the same purposes of the present invention Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the invention in its broadest form Before undertaking the DETAILED DESCRIPTION OF THE INVENTION below it may be advantageous to set forth definitions of certain words and phrases used through out this patent document the terms include and com prise as well as derivatives thereof mean inclusion without limitation the term or is inclusive meaning and or the phrases associated with and associated therewith as well as derivatives thereof may mean to include be included within interconnect with contain be contained within connect to or with couple to or with be communi cable with cooperate with interleave juxtapose be proxi mate to be bound to or with have have a property of or the like and the term controller means any device system or part thereof that controls at least one operation such a device may be implemented in hardware firmware or soft ware or some combination of at least two of the same It should be noted that the functionality associated with any particular controller may be centralized or distributed whether locally or remotely
24. via the transceiver in response to a determi nation that the display screen module and the user control module are separated so as to establish a low latency connection for communicating pack etized voice data the special purpose packet includ ing an indicator that the base station is to give priority to packets having voice data communicated between the base station and the portable device 20 The method as in claim 19 further comprising in response to a determination that the user control module and the display screen are reattached ceasing the communication of voice data and resuming the display of web page content on the display screen module 21 The method as in claim 19 further comprising initiating a low latency connection between the portable device and the base station for communicating one or more Internet Protocol IP data packets containing at least a portion of the voice data 22 A portable device comprising a display screen module comprising a display screen and a user control module removably attached to the display screen module and comprising a transceiver to wirelessly communicate with a base station coupled to a network means for executing an Internet browser application so as to display web page content on the display screen of the display screen module means for determining whether the display screen module and the user control module are attached and means for communicating a special purpose packet to t
25. wherein the control ler executes a voice over IP VoIP application to commu nicate the one or more IP data packets 5 The portable device as in claim 1 wherein the user control module further comprises a microphone for detect ing the voice of a user and a speaker for transmitting an incoming voice signal to the user 6 The portable device as in claim 1 wherein the control ler in response to a determination that the user control module and the display screen module are separated ini tiates a low latency connection with the base station for communicating voice data 7 The portable device as in claim 6 wherein the control ler in response to the determination that the user control module and the display screen module are separated ceases the execution of the Internet browser application 8 The portable device as in claim 7 wherein the control ler in response to a determination that the user control module and the display screen module are reattached resumes the execution of the Internet browser application 9 The portable device as in claim 1 wherein at least a portion of the web page content is provided to the Internet browser application from the network via the base station 0 6 952 414 1 9 10 system comprising base station coupled to a network and a portable device comprising a display screen module comprising a display screen and a user control module removably attached to the dis play screen
26. ystem as in claim 10 wherein the controller in response to a determination that the user control module and the display screen module are separated initiates a low latency connection with the base station for communicating voice data 16 The system as in claim 15 wherein the controller in response to the determination that the user control module and the display screen module are separated ceases the execution of the Internet browser application 17 The system as in claim 16 wherein the controller in response to a determination that the user control module and the display screen module are reattached resumes the execu tion of the Internet browser application 18 The system as in claim 10 wherein at least a portion of the web page content is provided to the Internet browser application from the network via the base station 19 A method comprising displaying web page content on a display screen module of a portable device when the display screen module is attached to a user control module of the portable device and 10 15 20 25 30 35 40 45 50 55 10 in response to a determination that the user control module and the display screen are separated ceasing the display of web page content on the display screen communicating voice data between a user of the por table device and a base station wirelessly coupled to the portable device and communicating a special purpose packet to the base station
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