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1. 117 blinks An interrupt control method according to the present invention will be described hereinafter in the case where the user is setting a time of day clock by pressing a certain function key again and again Referring to FIG 3 the control processor 103 checks at all times whether an incoming call interrupt and a key interrupt occur with higher priority assigned to the incoming call interrupt More specifically it is checked whether an incoming call interrupt occurs step S201 and if no incoming call occurs then checked whether a key interrupt 10 15 35 45 55 65 4 occurs step S202 Since the user is pressing the key to set the time of day clock here the number of minute digit of the time of day clock is incremented each the key is pressed unless an incoming call occurs step 5203 When the received message is input from the decoder 102 to the interrupt controller 104 control is forced to be transferred to an incoming call notifying routine in the progress of setting the time of day clock step 204 After starting the incoming call notifying routine the control processor 103 disables the key interrupt step 205 and then starts the timer 110 which is set to X seconds where X is a value selected from 0 5 1 0 1 5 and so on step S206 Since the key interrupt is ignored during this X second period the user s key operation has no effect on the incom ing call notifying routine When the X second period h
2. 2 The selective calling receiver according to claim 1 wherein the control means comprises first means for receiving a first interrupt request for the incoming call and a second interrupt request for the instruction second means for assigning a higher priority to the first interrupt request for the incoming call than the second interrupt request for the instruction and third means for ignoring the second interrupt request for the instruction during the predetermined time period immediately after the incoming call has been detected 3 The selective calling receiver according to claim 1 further comprising storage means for storing a base program and a plurality of function programs the base program providing basic operations of the selective calling receiver and processing means for executing the base program in which the control means is implemented and executing one of the function programs depending on the instruc tion corresponding to the user s manual operation 4 The selective calling receiver according to claim 1 wherein the input means comprises a plurality of keys which allow the user s manual operation 5 The selective calling receiver according to claim 1 wherein the input means comprises a plurality of keys including at least one key which is shared by a plurality of programs among the base program and the function pro grams 6 A selective calling receiver comprising input means for inputting an instruc
3. plurality of keys including at least one key which is shared by a plurality of programs among the base program and the function pro grams 25 35 40 45 50 55 60 6 9 The selective calling receiver according to claim 6 wherein the receiver control means controls the notifying means such that a message including in the incoming call is displayed on screen when the second interrupt of the instruc tion secondly occurs after the predetermined time period has elapsed 10 The selective calling receiver according to claim 7 wherein the receiver control means controls the notifying means such that a message including in the incoming call is displayed on screen when the second interrupt of the instruc tion secondly occurs after the predetermined time period has elapsed A receiving control method of a selective calling receiver having a keypad for inputting an instruction accord ing to a user s manual operation comprising the steps of a detecting an incoming call from the selective calling signal the incoming call being addressed to the selec tive calling receiver itself b notifying reception of the incoming call to a user through a predetermined medium and c ignoring the instruction received from the keypad during a predetermined time period immediately after the incoming call has been detected 12 The receiving control method according to claim 11 wherein the step c comprises the steps of receiv
4. 4 as described later assigns the top priority to the interrupt request of the decoder 102 for the received message processing The operating program other function programs and fonts for display on screen are stored in a program read only memory ROM 108 When the interrupt for the message reception occurs the interrupt controller 104 ignores user s key instructions received from the keypad for a predetermined time period At the same time the received message is stored onto a random access memory RAM 109 and the alert circuit is activated according to a selected informer mode The control processor 103 uses a timer 110 to check whether a lapse of time reaches the predetermined time period during which the user s key instructions are ignored as described in detail later By the user pressing a function key in a message read mode the control processor 103 reads the message from the RAM 109 and controls the LCD driver 111 using the font stored in the program ROM 107 so that the message is displayed on the LCD 112 When the interrupt for the message reception occurs the control processor 103 controls the alert controller 113 so that a selected alert device is activated More specifically if the user selects a beep mode the alert controller 113 controls an alert driver 114 so that a speaker 115 makes a beep and an light emitting diode LED 117 blinks If a silent mode is selected a vibrator 116 generates mechanical vibrations and the LED
5. 8 U S Patent JIL AB QNVIS 39VSS3W ONIQV3H 0344015 339 m TWO 9NIWOONI 9NIA31IION Q3uON9 1 SQNO93S X i Ldf yan 9NILL3S ANIL 803 SSLANIN 50 INSNSYONI ldfg31N TVD 9NIWOONI 95ld 5 734 331 1 INPUT CONTROL FOR RADIO SELECTIVE CALLING RECEIVER BACKGROUND OF THE INVENTION 1 Field of the invention The present invention generally relates to a radio selective calling receiver and in particular to a method and system for informing the user of an incoming call with reliability 2 Description of the Related Art A selective calling receiver has been widely used for various purposes and especially a small sized and light weight selective calling receiver called a pager is suitable for being taken on the road A basic function of the selective calling receiver is to indicate by beep sound vibration or light the incoming call and then to display a received message on an liquid crystal display LCD according to the user s key operation Since the incoming call notifying function has the highest priority the interrupt of the incom ing call can occur in the middle of performing another function Further in order to save space a plurality of operation modes usually share the use of the same key Since any incoming call occurs suddenly however the user cannot know in advance when an incoming call occurs resulting in a problem of operabil
6. United States Patent Makino 54 75 73 21 22 30 Jul 26 1995 51 52 58 56 INPUT CONTROL FOR RADIO SELECTIVE CALLING RECEIVER Inventor Tetuya Makino Shizuoka Japan Assignee NEC Corporation Tokyo Japan Appl No 687 038 Filed Jul 25 1996 Foreign Application Priority Data JP H04Q 1 00 U S Cli 340 825 44 341 24 Field of Search 340 825 44 825 36 455 38 1 341 24 References Cited U S PATENT DOCUMENTS 340 825 44 340 825 44 340 825 44 3 976 995 4 536 761 4 639 726 8 1976 Sebestyen 8 1985 Tsunoda 1 1987 Ichikawa INCOMING CALL INTERRUPT INCREMENT OF MINUTES FOR TIME SETTING t t 1 i 1 1 1 1 1 i 1 I mA X SECONDS KEY INTERRUPT iGNORED US005734331A Patent Number 734 331 45 Date of Patent Mar 31 1998 4 786 902 11 1988 Davis 340 825 44 5 173 688 12 1992 DeLuca et al 340 825 44 5 430 440 7 1995 Shim w 340 825 44 5 650 776 7 1997 Mitchell 340 825 44 Primary Examiner Brian Zimmerman Attorney Agent or Firm Sughrue Mion Zinn Macpeak amp Seas PLLC 57 ABSTRACT A selective calling receiver includes a keypad for inputting an instruction according to a user s manual operation and a detector for detecting an incoming call addressed to the selective calling receiver itself A notifying circui
7. as passed YES in step 207 the control processor 103 enables the key interrupt again step S208 Therefore when the user presses the key YES in step S209 the control processor 103 transfers control to a predetermined interrupt routine step 210 Since the incoming call notifying rou tine is now performed the user s key operation causes the alert controller 113 to stop the alert process and then the control processor 103 to read the message from the RAM 199 to display it on the LCD 112 As illustrated in FIG 4 in the case where the user is pressing the key again and again to set the time of day clock the control processor 103 starts the incoming call notifying routine at the time when receiving the message from the decoder 102 At the same time the control pro cessor 103 disables the key interrupt for X seconds during which the user s key operations are ignored resulting in no effect on the incoming call notifying routine After the X second period has elapsed the control processor 193 enables the key interrupt again thereby restoring the user s key operations Therefore when the user presses the key once just after the X second period has elapsed the control processor 103 controls the alert controller 113 so as to stop making a beep And then the following user s key operations cause the control processor 103 to read the message from the RAM 109 to display it on the LCD 112 and if all messages have been displayed then the con
8. ing a first interrupt request for the incoming call and a second interrupt request for the instruction assigning a higher priority to the first interrupt request for the incoming call than the second interrupt request for the instruction and ignoring the second interrupt request for the instruction during the predetermined time period immediately after the incoming call has been detected 13 A receiving control method of a selective calling receiver having a keypad for inputting an instruction accord ing to a user s manual operation comprising the steps of a detecting an incoming call from a selective calling signal the incoming call being addressed to the selec tive calling receiver itself b ignoring the instruction received from the keypad until a predetermined time period has elapsed immediately after the incoming call has been detected and c notifying reception of the incoming call to a user through a predetermined medium from when the incoming call is detected until the instruction first occurs after the predetermined time period has elapsed 14 The receiving control method according to claim 13 wherein the step c further comprises the step of displaying a message including in the incoming call on screen when the instruction secondly occurs after the predetermined time period has elapsed 15 The receiving control method according to claim 13 further comprising the step of assigning a higher priority to a first interr
9. ion secondly occurs after the predeter mined time period has elapsed As described above according to the present invention the user s manual operation is ignored for a predetermined time period after an incoming call is detected Therefore the user s misoperation is effectively prevented even When an incoming call suddenly occurs In addition the user can confirm the occurrence of the incoming call before manually operating the input means to stop the notifying circuit working and display the received message on screen In other words the incoming call notifying process is pro gressed by the user with reliability BRIEF DESCRIPTION OF THE DRAWINGS FIG 1is a time chart showing an example of the operation of a conventional radio selective calling receiver FIG 2 is a block diagram showing a radio selective calling receiver according to an embodiment of the present invention FIG 3 is a flowchart showing the operation of an interrupt control according to the embodiment and FIG 4 is a time chart showing an example of the operation of the embodiment DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG 1 there is shown a selective calling receiver in accordance with the present invention The 5 734 331 3 selective calling receiver is comprised of a radio system and a control unit which is connected to a battery a key pad a liquid crystal display LCD and an alert circuit The radio system is comp
10. ity as follows As showing in FIG 1 assuming that the user is setting a time of day clock by pressing a key again and again Each time the key is pressed in a time setting mode the number of the minute digit for example is incremented When an incoming call occurs however control is forced to be transferred to the incoming call notifying mode in the progress of setting the time of day clock In cases where the use of that key is shared the notifying routine is progressed unless the user stops pressing the key More specifically referring to FIG 1 when the user presses the key just after the incoming call has occurred the beeping sound is reset On subsequently pressing the key several times a received message is read and displayed on the LCD and then the operation state is changed to a stand by state after all the message has been displayed Such a sequence may give the user the impression that an initial stand by screen suddenly appears due to some mistake SUMMARY OF THE INVENTION An object of the present invention is to provide a radio selective calling receiver and its control method which permit the user to control the incoming call notifying process with reliability Another object of the present invention is to provide a control method which achieves reliable operability even when an incoming call suddenly occurs in the middle of the user s key operation According to the present invention any instruction due to the
11. rised of a built in antenna and a radio receiver 101 The receiver 101 receives an FSK Frequency Shift Keying modulated radio signal from a radio base station not shown of a selective calling system through the antenna The receiver 101 further includes an FSK demodu lator which demodulates the received radio signal into a baseband signal After the waveform of the baseband signal is shaped the wave shaped signal is transferred as a selec tive calling signal from the radio receiver 101 to a decoder 102 The decoder 102 receives the selective calling signal from the radio receiver 101 and decodes it into received data In this embodiment the decoder 102 further compares the selective calling number included in the received data with the identification ID number previously stored in an ID ROM 107 under the control of a control processor 103 When the selective calling number included in the received data is identical to the ID number the decoder 102 outputs a message included in the received data to the control processor 103 The control processor 103 receives not only the received message from the decoder 102 but also user s key instruc tions from key pad including a mode selector 105 and other function keys 106 As described before a plurality of operation modes share the use of the same key for space saving The control processor 103 implements an interrupt controller 10 based on the operating program The interrupt controller 10
12. t interrupt of the incoming call than a second interrupt of the instruction and ignoring the second interrupt of the instruction until a predetermined time period has elapsed immediately after the incoming call has been detected The receiver controller activates the notifying circuit from when the incoming call is detected until the second interrupt of the instruction first occurs after the predetermined time period has elapsed Preferably the receiver controller controls the notifying circuit such that a message including in the incoming call is displayed on screen when the second interrupt of the instruc tion secondly occurs after the predetermined time period has elapsed According to another aspect of the present invention when the incoming call is detected control is changed from a first operation mode determined by the instruction to a second operation mode which provides a first step such that the incoming call is notified to a user through a predeter mined medium At the same time the instruction due to the user s manual operation is ignored until a predetermined time period has elapsed immediately after the incoming call is detected and the first step is performed from when the incoming call is detected until the instruction first occurs after the predetermined time period has elapsed Preferably the second operation mode provides a second step of dis playing a message including in the incoming call on screen when the instruct
13. t notifies reception of the incoming call to a user through sound light and or vibration When the incoming call is detected a control processor transfers control to an incoming call notifying routine and at the same time ignores the instruc tion received from the keypad during a predetermined time period immediately after the incoming call has been detected After the predetermined time period has passed the instruction due to the user s manual operation is enabled again 17 Claims 4 Drawing Sheets BEEP STOPPED READING MESSAGE STAND BY K INTERRUPT TIME 5 734 331 Sheet 1 of 4 Mar 31 1998 U S Patent l3S3d 339 ldfid331N A33 QV3H 39VSS3W ldfijj31N A3 ONILIAS INIL os SSS ey Vd ed AH QNVIS 39VSS3W SNIQV3H d338 SSLNNIW 3O 1N3A3HONI 9NILISS SAIL TWO 5NINODNI LHV HOl8Hd Old 5 734 331 Sheet 2 of 4 Mar 31 1998 U S Patent 111 o 1948 A yi i Y3A Id 911 10 143W l YSTIOWLNOD 193 3413038 0104 I I 83A13938 014 5 SLIMOYID H3HIO j A 011 01 101 LINN TOYLNOD AN VNN31NV SAJA NOILONNA 01937135 3Q0W i 1 901 901 E u u v a QVdA3 6 Old U S Patent Mar 31 1998 Sheet 3 of 4 5 734 331 FIG 3 201 INCOMING CALL 1 NTERRUPT OCCURS S204 YES INTERRUPT ROUTINE BEEP STOP AND MESSAGE READ ROUTINE 5 734 331 Sheet 4 of 4 Mar 31 199
14. tion according to a user s manual operation receiving means for receiving a selective calling signal detecting means for detecting an incoming call from the selective calling signal the incoming call being addressed to the selective calling receiver itself notifying means for notifying reception of the incoming call to a user through a predetermined medium interrupt control means for assigning a higher priority to a first interrupt of the incoming call than a second interrupt of the instruction and ignoring the second interrupt of the instruction until a predetermined time period has elapsed immediately after the incoming call has been detected and receiver control means for activating the notifying means from when the incoming call is detected until the second interrupt of the instruction first occurs after the predetermined time period has elapsed 7 The selective calling receiver according to claim 6 further comprising storage means for storing a base program and a plurality of function programs the base program providing basic operations of the selective calling receiver and processing means for executing the base program by which the interrupt control means and the receiver control means are implemented therein and executing one of the function programs depending on the instruc tion corresponding to the user s manual operation 8 The selective calling receiver according to claim 7 wherein the input means comprises a
15. trol processor 103 returns to the stand by state The X second period during which the user s key opera tions are ignored is preferably determined so that the user is prevented from mistakenly pressing the key and the beep is stopped as soon as possible For example the time period X is set to about 2 seconds As described above according to the present invention the user s key interrupt is ignored for a predetermined time period after an incoming call is detected Therefore the user s misoperation is effectively prevented even when an incoming call suddenly occurs Since the user can confirm the occurrence of the incoming call before pressing the key to stop the beep and display the received message on screen the incoming call notifying process is progressed under the control of the user with reliability What is claimed is 1 A selective calling receiver for receiving a selective calling signal comprising input means for inputting an instruction according to a user s manual operation detecting means for detecting an incoming call from the selective calling signal the incoming call being addressed to the selective calling receiver itself notifying means for notifying reception of the incoming call to a user through a predetermined medium and 5 734 331 5 control means for ignoring the instruction received from the input means during a predetermined time period immediately after the incoming call has been detected
16. upt of the incoming call than a second interrupt of the instruction 16 A receiving control method of a selective calling receiver having a keypad for inputting an instruction accord ing to a user s manual operation comprising the steps of a detecting an incoming call from a selective calling signal the incoming call being addressed to the selec tive calling receiver itself b changing control from a first operation mode deter mined by the instruction to a second operation mode when the incoming call is detected the second opera tion mode providing a first step such that the incoming call is notified to a user through a predetermined medium 5 734 331 7 8 c ignoring the instruction until a predetermined time 17 The receiving control method according to claim 16 period has elapsed immediately after the incoming call wherein the second operation mode provides a second step is detected and of displaying a message including in the incoming call on screen when the instruction secondly occurs after the pre d performing the first step from when the incoming call 5 determined time period has elapsed is detected until the instruction first occurs after the predetermined time period has elapsed k
17. user s manual operation is ignored during a predeter mined time period just after an incoming call occurs More specifically a selective calling receiver according to the present invention is provided with an input means for inputting an instruction according to a user s manual opera tion and a detector for detecting an incoming call from a selective calling signal the incoming call being addressed to the selective calling receiver itself Further the selective calling receiver is provided with a notifying circuit and a controller The notifying circuit notifies reception of the incoming call to a user through at least one predetermined medium such as sound light and or vibration The control ler ignores the instruction received from the input means 10 15 25 35 45 55 65 2 during a predetermined time period immediately after the incoming call has been detected The controller is preferably implemented by a base pro gram stored in a program memory The program memory further stores a plurality of function programs one of which is executed in accordance with the user s manual operation The input means comprises a plurality of keys including at least one key which is shared by a plurality of programs among the base program and the function programs The selective calling receiver is further provided with an interrupt controller and a receiver controller The interrupt controller assigns a higher priority to a firs

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