JPWO2008068848A1 - Mobile communication terminal and communication control method - Google Patents

Abstract

A mobile communication terminal capable of obtaining necessary information and reducing power consumption even when receiving notification information as communication regulation information in an environment where power is not available such as in a disaster. The mobile communication terminal (100) is a mobile communication terminal whose communication is restricted by the broadcast information, and the CS call restriction information included in the broadcast information received by the transmission / reception unit (110) is detected by the detection unit (132). . When the CS call restriction information is detected by the detection unit (132), the communication control unit (134) stops the communication of the CS call and the PS call, and sets the PS call confirmation timer (122) for the PS call. By using this, at least one communication is performed after a predetermined time.

Description

  The present invention relates to a mobile communication terminal device, and more particularly to a mobile communication terminal and a communication control method that are restricted in communication by broadcast information.

  2. Description of the Related Art Conventionally, a communication system including a base station connected to a plurality of communication lines and a plurality of portable wireless telephones (mobile communication terminal devices) in a range connected to the base station via a wireless line has become widespread.

  In this communication system, when terminal users are concentrated in an emergency such as a disaster, notification information as communication restriction information is transmitted from the network side to the mobile wireless telephone to be restricted, and the mobile wireless telephone Operations that restrict the use of communications are being planned.

  The mobile communication terminal that receives the broadcast information determines whether or not standby is possible using the restriction information and the like, and repeatedly receives broadcast information until a standby cell is detected. For this reason, even when the mobile communication terminal receives broadcast information as communication restriction information indicating that there is no cell that can be awaited in the vicinity, the mobile communication terminal continuously receives the broadcast information and consumes power.

  On the other hand, the mobile communication terminal of Patent Document 1 attempts to reduce power consumption by changing the reception interval of the notification information when standby is impossible due to the notification information (regulation information).

  By the way, as shown in Non-Patent Document 1, in recent years, CS call communication that is voice communication and PS call communication that is packet communication such as mail are individually regulated by notification information transmitted to a mobile radio telephone. It is known that it can be done.

Note that CS call communication is mainly a voice communication network that transfers information via a CS network having a circuit switched function. PS call communication is mainly a packet It is assumed that information is transferred via a packet switching network that is a communication network and has a packet switched function.
JP 2004-120258 A `` Radio Resource Control (RRC) Protocol Specification (TS25.331) ''

  In general, the restriction of communication for portable radio telephones is only CS call communication mainly for voice communication.

  In Patent Document 1, it is determined whether or not standby is possible based on broadcast information. When standby is impossible, power consumption is reduced by extending the reception interval of broadcast information, but communication restriction information of broadcast information is a CS call. In the case of only the restriction (DSAC) information, the mobile radio telephone that has received this information is in a standby state in a state where CS call communication is not possible, that is, a standby state for only PS calls. Therefore, under the CS call restriction, a normal standby operation is performed for the PS call, and wasteful power is consumed in an environment where the CS call is restricted and power is not available, such as in a disaster. There is a problem of end. Further, Patent Document 1 has a problem that necessary information cannot be obtained from the outside until the CS call restriction is canceled.

  The object of the present invention has been made in view of the above-described circumstances, and even when notification information is received as communication restriction information in an environment where a power source cannot be obtained, such as in a disaster, necessary information can be obtained. At the same time, it is to provide a mobile communication terminal and a communication control method capable of reducing power consumption.

  A mobile communication terminal according to the present invention is a mobile communication terminal whose communication is restricted by broadcast information, a reception means for receiving the broadcast information, and a detection means for detecting CS call restriction information included in the received broadcast information And a communication control means for stopping communication of the CS call and the PS call when the CS call restriction information is detected, and causing the PS call to communicate at least once before stopping. take.

  The communication control method of the present invention is a communication control method for a mobile communication terminal in which communication is restricted by broadcast information, and includes a reception step of receiving broadcast information, and a CS call restriction contained in the received broadcast information. A detection step for detecting, and a communication control step for stopping communication of the CS call and the PS call when the CS call restriction is detected, and causing the PS call to perform communication at least once before stopping. I did it.

  According to the present invention, even when broadcast information is received as communication restriction information in an environment where power is not available, such as during a disaster, necessary information can be obtained by at least one communication of a PS call and consumption can be achieved. Electricity can be saved.

FIG. 1 is a block diagram showing a configuration of a mobile communication terminal according to Embodiment 1 of the present invention. Flowchart for explaining the operation of the mobile communication terminal according to Embodiment 1 of the present invention. Flow chart for explaining the operation of the mobile communication terminal according to the second embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of a communication system 300 having a mobile communication terminal 100 for explaining the configuration of the mobile communication terminal 100 according to Embodiment 1 of the present invention.

  As shown in FIG. 1, in the communication system 300, the mobile communication terminal 100 exists in a range where radio communication with a radio base station (BS) 200 is possible. In the communication system 300, a plurality of mobile communication terminals 100 can communicate via the radio base station 200.

  In the communication system 300, when communication is concentrated in an emergency such as a disaster, broadcast information including communication restriction information is broadcast from the radio base station 200 to the mobile communication terminals 100 in the area. When the mobile communication terminal 100 receives this notification information, the mobile communication terminal 100 is restricted from communicating.

  The communication restriction information included in the broadcast information transmitted from the radio base station 200 to the mobile communication terminal 100 includes a CS call, which is a voice communication call for transferring information by circuit switching (CS: Circuit Switch), a packet At least one of PS calls, which are data communication calls for transferring data, is regulated by exchange (PS: Packet Switch).

  Here, the network-side device that transmits the broadcast information to mobile communication terminal 100 is radio base station 200, but the radio base station may be a radio base station group including a plurality of radio base stations. In this case, broadcast information is transmitted from each of a plurality of radio base stations constituting the radio base station group to mobile communication terminals in the area.

  The mobile communication terminal 100 includes a transmission / reception unit 110, a timer unit 120, and a control unit 130 that controls the transmission / reception unit 110 and the timer unit 120.

  The transmission / reception unit 110 performs modulation / demodulation and encoding / decoding of the signal to be transmitted / received, converts (encodes) an analog signal such as an audio signal into a digital signal at the time of transmission, and modulates the converted digital signal into a signal that can be carried To do. Further, at the time of reception, the transmission / reception unit 110 demodulates the digital signal input from the antenna 111 and converts (decodes) the demodulated digital signal into an analog signal.

  Specifically, the transmission / reception unit 110 is controlled by the control unit 130 and receives broadcast information transmitted from the radio base station 200. Alternatively, the transmission / reception unit 110 registers a location in the radio base station 200 and The station 200 is used to perform CS call communication and PS call communication.

  The timer unit 120 includes a CS call communication confirmation timer (hereinafter referred to as “CS call confirmation timer”) 121 and a PS call communication start timer (hereinafter referred to as “PS call start timer”) 122.

  The CS call confirmation timer 121 transmits / receives information to confirm broadcast information, that is, CS call restriction, in the offline mode, which is a mode in which communication functions are stopped (connection of CS call communication and PS call communication is stopped). The time until the unit 110 is set in the notification information standby state is stored, the time is counted, and the time is output to the control unit 130.

  The PS call start timer 122 stores the time for performing PS call communication in the offline mode, measures the time, and outputs the time to the control unit 130.

  The control unit 130 controls each unit according to a program stored in a ROM (not shown). For example, the control unit 130 determines communication restriction information in the broadcast information, and uses the timer unit 120 based on the communication restriction information detected by the determination to perform CS call communication and PS call communication via the transmission / reception unit 110. Control the offline mode to stop the connection and the operation to turn off the power.

  Specifically, the control unit 130 uses the detection unit 132 that detects the restriction information (mainly CS call restriction information) included in the broadcast information received via the transmission / reception unit 110, and the detection result of the detection unit 132. And a communication control unit 134 that controls a communication state using the transmission / reception unit 110. In the control unit 130, in particular, when the CS call restriction information is detected, the communication control unit 134 stops the communication of the CS call and the PS call, and performs the communication at least once before stopping the PS call. Make it.

  The detection unit 132 detects at least one of CS call restriction information and PS call restriction information, which is restriction information in the broadcast information received via the transmission / reception unit 110, and outputs the detection result to the communication control unit 134. .

  Specifically, the detection unit 132 detects PS call restriction information by detecting CS call restriction (DSAC) information from the broadcast information. Here, when the detection unit 132 detects CS call restriction (DSAC) information from the broadcast information received via the transmission / reception unit 110, PS call communication is not restricted, and only CS call communication is restricted. Shall.

  When detecting CS call restriction (DSAC) information from the broadcast information, the detecting unit 132 determines that there is CS call communication restriction. When the CS call information cannot be detected, the CS call communication restriction is not established or the PS call restriction is established. Assume that there is.

  Moreover, the detection part 132 detects whether CS call restrictions are cancelled | released from the alerting | reporting information received by the fixed interval after detecting CS restriction information. In other words, the detection unit 132 determines that the CS call restriction is released when the CS call restriction is not detected from the broadcast information received at regular intervals.

  The communication control unit 134 controls communication using the transmission / reception unit 110 and the timer unit 120 according to the detection result from the detection unit 132.

  Here, when the CS call restriction information is detected by the detection unit 132, that is, when it is determined that the CS call restriction is present, the communication control unit 134 uses the CS call confirmation timer 121 for a predetermined time (Tc). The waiting for CS call communication and broadcast information by the transmission / reception unit 110 is stopped, and after a predetermined time (Tc), the standby state of the broadcast information via the transmission / reception unit 110, that is, CS call communication regulation (DSAC) can be confirmed. Put it in a state.

  In particular, when only the CS call restriction information is detected by the detection unit 132, the communication control unit 134 uses the PS call start timer 122 to perform a PS call performed via the transmission / reception unit 110 for a predetermined time (Tp). The communication is stopped, and after a predetermined time (Tp), PS call communication is performed using the transmission / reception unit 110.

  In addition, when the detection unit 132 detects PS call restriction information, the communication control unit 134 stops PS call communication via the transmission / reception unit 110 by executing the offline mode.

  Further, the communication control unit 134 determines the predetermined time (Tc) stored in the CS call confirmation timer 121, that is, a predetermined time until waiting for the notification information, and the predetermined time stored in the PS call start timer 122. The time (Tp), that is, the time until the PS call communication is performed is compared.

  In addition, when only the CS call restriction information is detected by the detection unit 132, the communication control unit 134 stops the CS call communication and waits for broadcast information, and after performing PS call communication, the communication offline mode Instead of this, a process of turning off the power of the terminal itself may be performed.

  As described above, when the broadcast information includes the CS call restriction information and the PS call restriction information, the control unit 130 uses the timer unit 120 to control the transmission / reception unit 110 to perform a predetermined time (Tc). In the meantime, the CS call communication is stopped and the PS call communication is stopped for a predetermined time (Tp). After the predetermined time elapses, only the PS call communication is performed, and then the PS call communication offline mode is executed again.

  Next, the operation of mobile communication terminal 100 according to Embodiment 1 will be described. FIG. 2 is a flowchart showing the operation of mobile communication terminal 100 according to Embodiment 1 of the present invention.

  As shown in FIG. 2, first, the control unit 130 of the mobile communication terminal 100 controls the transmission / reception unit 110 to enter a notification information standby state (S101).

  In the notification information standby state, the control unit 130 receives the notification information from the radio base station (group) 200 via the transmission / reception unit 110 (S102).

  Next, in the detection unit 132, the control unit 130 detects restriction information in the received broadcast information, that is, determines whether there is DSAC (CS call restriction information) in the received broadcast information (S103). ).

  When there is no CS call restriction information as a result of determination by the detection unit 132, that is, when the restriction is not restricted to only the CS call (S103: NO “No CS call restriction or PS call restriction”), the control unit 130 Returning to standby (S104), the process is terminated.

  Here, normal standby is standby in which CS call communication is possible, and means a state before restriction of reception of broadcast information, CS call communication, and PS call communication in the mobile communication terminal 100. That is, when the CS call restriction is canceled, the communication control unit 134 performs control for the transmission / reception unit 110 and the like to return the notification information and return the CS call and PS call communication to the state before restriction.

  When the detection unit 132 detects the CS call restriction information, that is, when the CS call restriction is confirmed (S103: YES “CS call restriction exists”), the communication control unit 134 includes each unit related to communication including the transmission / reception unit 110. Is controlled (the communication in the mobile communication terminal 100 is set to the offline mode), and the CS call confirmation timer 121 and the PS call start timer 122 of the timer unit 120 are operated (S105).

  Next, the communication control unit 134 of the control unit 130 determines whether or not the predetermined time (Tc) for CS call confirmation has timed out, that is, has expired (S106).

  When the time stored in the CS call confirmation timer 121 has expired (S106: YES), the timer unit 120 notifies the communication control unit 134 of the control unit 130 that the CS call confirmation timer 121 has expired (S107).

  The communication control unit 134 that has received the notification that the CS call confirmation timer 121 has expired sets the transmission / reception unit 110 in a standby state for notification information, and acquires notification information via the transmission / reception unit 110 (S102).

  If the CS call confirmation timer 121 has not expired (S106: NO), the communication control unit 134 waits for a timer expiration notification from the PS call start timer 122, and when the PS call start timer 122 expires, In other words, after the elapse of a predetermined time (Tp), the communication control unit 134 that has received the notification starts communication of the PS call via the transmission / reception unit 110 and accesses the server to acquire mail, disaster information, and the like. (S108). Here, the communication control unit 134 stops after one communication for the PS call.

  In addition, since the predetermined time (Tc) of the CS call confirmation timer 121 and the predetermined time (Tp) of the PS call start timer 122 can be set to different values, the operation may be switched.

  As described above, the mobile communication terminal 100 receives the broadcast information from the base station, determines CS call restriction based on the DSAC information in the broadcast information, and automatically goes offline when it is determined that the call is CS call restriction. Enter the mode. When entering the offline mode, when a predetermined time elapses, PS call communication is automatically started, and information is acquired from the server via the PS exchange network, and when a predetermined time elapses. The broadcast information is automatically received and the CS call restriction is confirmed.

  That is, in the mobile communication terminal 100, the mobile communication terminal 100 that can stand by enters the offline mode when a CS call restriction (DSAC) information is detected from the received broadcast information, and a predetermined time (Tc) has elapsed. After that, the broadcast information is automatically received and the presence / absence of CS call restriction information is confirmed. By checking the presence / absence of the CS call restriction information, it can be confirmed whether or not the offline mode is continued.

  Also, the presence or absence of PS call restriction information can be confirmed from the broadcast information as CS call restriction information is detected. As a result, when only the CS call restriction information is confirmed, that is, when there is no PS call restriction, standby for CS call communication, PS call communication, and broadcast information is stopped and the offline mode is set. During this time, after elapse of a predetermined time (Tp), PS call communication is started, at least one PS call communication is performed, and the offline mode is set until the predetermined time (Tc) elapses.

  As a result, when CS calls are regulated, unlike the conventional case, the processing related to PS call communication is not continued, and information is stored in the server by starting PS call communication after a predetermined time (Tp) has elapsed. , You can get the information, and then go into offline mode again.

  Therefore, even in an environment where communication is concentrated in the communication system 300, CS call restriction (DSAC) information which is communication restriction information is included in the broadcast information, and power cannot be secured, the mobile communication terminal 100 Information can be acquired without using wasteful power consumption.

  This is a case where the power supply cannot be secured, such as in a disaster, and when there is a CS call restriction that is communication restriction information, that is, voice communication restriction, that is, only a PS call at the time of CS call restriction can be waited In this case, PS call communication is set offline, and after a predetermined time in the offline state, PS call communication is performed and then set offline again. Therefore, at the time of CS call restriction, necessary information can be obtained via PS network by PS call communication, and PS call communication itself is also in an offline mode before and after the necessary information acquisition operation by PS call communication. Because communication is stopped, power consumption can be reduced.

(Embodiment 2)
Next, the operation of the second embodiment will be described. FIG. 3 is a diagram showing a flowchart showing operations in the mobile communication terminal according to Embodiment 2 of the present invention.

  The configuration of the mobile communication terminal according to the second embodiment has the same basic configuration as that of the mobile communication terminal 100 according to the first embodiment, and the processing after the CS call restriction is detected by the communication control unit 134 is different. It is assumed that mobile communication terminal 100 exists within the communicable range of base station apparatus 200, that is, within the cell of base station apparatus 200.

  As shown in FIG. 3, first, the control unit 130 of the mobile communication terminal 100 controls the transmission / reception unit 110 to enter a notification information standby state (S201).

  In the notification information standby state, the control unit 130 receives the notification information from the radio base station 200 via the transmission / reception unit 110 (S202). The radio base station 200 may be a radio base station group.

  Next, in the detection unit 132, the control unit 130 determines communication restriction information in the received broadcast information, that is, determines whether there is DSAC (CS call restriction information) (S203).

  As a result of the determination of the communication regulated by the broadcast information, when the restriction is not restricted to only the CS call (S203: “CS call is not restricted or PS call is restricted”), the process returns to normal standby (S204), and the process is terminated. . Here, normal standby is standby in which CS call communication is possible, and means a state before restriction of reception of broadcast information, CS call communication, and PS call communication in the mobile communication terminal 100. That is, when the CS call restriction is canceled, the communication control unit 134 performs control for the transmission / reception unit 110 and the like to return the notification information and return the CS call and PS call communication to the state before restriction.

  When the detection unit 132 detects CS call restriction (DSAC) information, that is, when the restriction of the CS call indicating that the CS call is being restricted is confirmed (S203: “CS call restriction exists”), the control part 130 By starting call communication and accessing the server, e-mail and disaster information are acquired (S205).

  Thereafter, the control unit 130 turns off the mobile communication terminal (S206) and ends the process.

  As described above, the mobile communication terminal according to Embodiment 2 determines the received broadcast information, and when CS call restriction information is detected, that is, when DSAC is detected, CS call and PS call communication. For PS calls, communication is performed at least once before stopping, and then the power is turned off, that is, the terminal is turned off including the CS call communication and PS call communication stop processing.

  That is, when broadcast information is received from the radio base station 200, CS call restriction is determined based on DSAC information in the broadcast information, and at least one PS call communication is performed when it is determined that the call is CS call restriction. After the power is turned off automatically. When the power is turned on again, the notification information is automatically received via the transmission / reception unit 110, the notification information is determined by the control unit 130, and communication control corresponding to the communication regulation is performed.

  As a result, during CS call regulation, by restricting CS call communication, power consumption consumed by CS call communication is reduced, and at least one PS call communication before stoppage is sent to the server by mail, disaster information, etc. If this information is stored, it can be acquired.

  Then, by cutting off the power supply, all functions including the wireless communication function such as standby for notification information, CS call communication, and PS call communication can be stopped. As a result, during the CS call restriction period, not only the waiting for notification information and the CS call communication are not performed, but also the PS call communication is not performed. Therefore, it is possible to reduce the amount of power consumed by PS call communication during CS call regulation.

  The embodiments of the present invention have been described above.

  The mobile communication terminal according to the present invention is not limited to the above embodiments, and can be implemented with various modifications.

  The mobile communication terminal according to the present invention can be installed in a mobile phone in a communication system capable of performing CS call communication and PS call communication, and thereby a mobile phone communication terminal device having the same operation and effect as described above. Can be provided.

  Here, the case where the present invention is configured by hardware has been described as an example, but the present invention can also be realized by software. For example, a function similar to that of the apparatus according to the present invention is realized by describing the algorithm of the communication control method according to the present invention in a program language, storing the program in a memory, and causing the information processing means to execute the algorithm. Can do.

  The mobile communication terminal and the communication control method according to the present invention can obtain necessary information even when receiving notification information as communication regulation information in an environment where power is not available, such as at the time of a disaster, and PS power consumption It is useful as a mobile communication terminal in a mobile terminal communication system using a CS network and a PS network.

  The present invention relates to a mobile communication terminal device, and more particularly to a mobile communication terminal and a communication control method that are restricted in communication by broadcast information.

  2. Description of the Related Art Conventionally, a communication system including a base station connected to a plurality of communication lines and a plurality of portable wireless telephones (mobile communication terminal devices) in a range connected to the base station via a wireless line has become widespread.

  In this communication system, when terminal users are concentrated in an emergency such as a disaster, notification information as communication restriction information is transmitted from the network side to the mobile wireless telephone to be restricted, and the mobile wireless telephone Operations that restrict the use of communications are being planned.

  The mobile communication terminal that receives the broadcast information determines whether or not standby is possible using the restriction information and the like, and repeatedly receives broadcast information until a standby cell is detected. For this reason, even when the mobile communication terminal receives broadcast information as communication restriction information indicating that there is no cell that can be awaited in the vicinity, the mobile communication terminal continuously receives the broadcast information and consumes power.

  On the other hand, the mobile communication terminal of Patent Document 1 attempts to reduce power consumption by changing the reception interval of the notification information when standby is impossible due to the notification information (regulation information).

  By the way, as shown in Non-Patent Document 1, in recent years, CS call communication that is voice communication and PS call communication that is packet communication such as mail are individually regulated by notification information transmitted to a mobile radio telephone. It is known that it can be done.

Note that CS call communication is mainly a voice communication network that transfers information via a CS network having a circuit switched function. PS call communication is mainly a packet It is assumed that information is transferred via a packet switching network that is a communication network and has a packet switched function.
JP 2004-120258 A `` Radio Resource Control (RRC) Protocol Specification (TS25.331) ''

  In general, the restriction of communication for portable radio telephones is only CS call communication mainly for voice communication.

In Patent Document 1, it is determined whether or not standby is possible based on broadcast information. When standby is impossible, power consumption is reduced by extending the reception interval of broadcast information, but communication restriction information of broadcast information is a CS call. In the case of only the restriction (DSAC) information, the mobile radio telephone that has received this information is in a standby state in a state where CS call communication is not possible, that is, a standby state for only PS calls. Therefore, under the CS call restriction, a normal standby operation is performed for the PS call, and wasteful power is consumed in an environment where the CS call is restricted and power is not available, such as in a disaster. There is a problem of end. Further, Patent Document 1 has a problem that necessary information cannot be obtained from the outside until the CS call restriction is canceled.

  The object of the present invention has been made in view of the above-described circumstances, and even when notification information is received as communication restriction information in an environment where a power source cannot be obtained, such as in a disaster, necessary information can be obtained. At the same time, it is to provide a mobile communication terminal and a communication control method capable of reducing power consumption.

The mobile communication terminal of the present invention is a mobile communication terminal whose communication is restricted by broadcast information,
The receiving means for receiving the broadcast information, the detecting means for detecting CS call restriction information included in the received broadcast information, and when CS call restriction information is detected, the communication of the CS call and PS call is stopped. The PS call is configured to include communication control means for performing communication at least once before stopping the PS call.

  The communication control method of the present invention is a communication control method for a mobile communication terminal in which communication is restricted by broadcast information, and includes a reception step of receiving broadcast information, and a CS call restriction contained in the received broadcast information. A detection step for detecting, and a communication control step for stopping communication of the CS call and the PS call when the CS call restriction is detected, and causing the PS call to perform communication at least once before stopping. I did it.

  According to the present invention, even when broadcast information is received as communication restriction information in an environment where power is not available, such as during a disaster, necessary information can be obtained by at least one communication of a PS call and consumption can be achieved. Electricity can be saved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of a communication system 300 having a mobile communication terminal 100 for explaining the configuration of the mobile communication terminal 100 according to Embodiment 1 of the present invention.

  As shown in FIG. 1, in the communication system 300, the mobile communication terminal 100 exists in a range where radio communication with a radio base station (BS) 200 is possible. In the communication system 300, a plurality of mobile communication terminals 100 can communicate via the radio base station 200.

  In the communication system 300, when communication is concentrated in an emergency such as a disaster, broadcast information including communication restriction information is broadcast from the radio base station 200 to the mobile communication terminals 100 in the area. When the mobile communication terminal 100 receives this notification information, the mobile communication terminal 100 is restricted from communicating.

  The communication restriction information included in the broadcast information transmitted from the radio base station 200 to the mobile communication terminal 100 includes a CS call, which is a voice communication call for transferring information by circuit switching (CS: Circuit Switch), a packet At least one of PS calls, which are data communication calls for transferring data, is regulated by exchange (PS: Packet Switch).

  Here, the network-side device that transmits the broadcast information to mobile communication terminal 100 is radio base station 200, but the radio base station may be a radio base station group including a plurality of radio base stations. In this case, broadcast information is transmitted from each of a plurality of radio base stations constituting the radio base station group to mobile communication terminals in the area.

  The mobile communication terminal 100 includes a transmission / reception unit 110, a timer unit 120, and a control unit 130 that controls the transmission / reception unit 110 and the timer unit 120.

  The transmission / reception unit 110 performs modulation / demodulation and encoding / decoding of the signal to be transmitted / received, converts (encodes) an analog signal such as an audio signal into a digital signal at the time of transmission, and modulates the converted digital signal into a signal that can be carried To do. Further, at the time of reception, the transmission / reception unit 110 demodulates the digital signal input from the antenna 111 and converts (decodes) the demodulated digital signal into an analog signal.

  Specifically, the transmission / reception unit 110 is controlled by the control unit 130 and receives broadcast information transmitted from the radio base station 200. Alternatively, the transmission / reception unit 110 registers a location in the radio base station 200 and The station 200 is used to perform CS call communication and PS call communication.

  The timer unit 120 includes a CS call communication confirmation timer (hereinafter referred to as “CS call confirmation timer”) 121 and a PS call communication start timer (hereinafter referred to as “PS call start timer”) 122.

  The CS call confirmation timer 121 transmits / receives information to confirm broadcast information, that is, CS call restriction, in the offline mode, which is a mode in which communication functions are stopped (connection of CS call communication and PS call communication is stopped). The time until the unit 110 is set in the notification information standby state is stored, the time is counted, and the time is output to the control unit 130.

  The PS call start timer 122 stores the time for performing PS call communication in the offline mode, measures the time, and outputs the time to the control unit 130.

  The control unit 130 controls each unit according to a program stored in a ROM (not shown). For example, the control unit 130 determines communication restriction information in the broadcast information, and uses the timer unit 120 based on the communication restriction information detected by the determination to perform CS call communication and PS call communication via the transmission / reception unit 110. Control the offline mode to stop the connection and the operation to turn off the power.

  Specifically, the control unit 130 uses the detection unit 132 that detects the restriction information (mainly CS call restriction information) included in the broadcast information received via the transmission / reception unit 110, and the detection result of the detection unit 132. And a communication control unit 134 that controls a communication state using the transmission / reception unit 110. In the control unit 130, in particular, when the CS call restriction information is detected, the communication control unit 134 stops the communication of the CS call and the PS call, and performs the communication at least once before stopping the PS call. Make it.

  The detection unit 132 detects at least one of CS call restriction information and PS call restriction information, which is restriction information in the broadcast information received via the transmission / reception unit 110, and outputs the detection result to the communication control unit 134. .

  Specifically, the detection unit 132 detects PS call restriction information by detecting CS call restriction (DSAC) information from the broadcast information. Here, when the detection unit 132 detects CS call restriction (DSAC) information from the broadcast information received via the transmission / reception unit 110, PS call communication is not restricted, and only CS call communication is restricted. Shall.

  When detecting CS call restriction (DSAC) information from the broadcast information, the detecting unit 132 determines that there is CS call communication restriction. When the CS call information cannot be detected, the CS call communication restriction is not established or the PS call restriction is established. Assume that there is.

  Moreover, the detection part 132 detects whether CS call restrictions are cancelled | released from the alerting | reporting information received by the fixed interval after detecting CS restriction information. In other words, the detection unit 132 determines that the CS call restriction is released when the CS call restriction is not detected from the broadcast information received at regular intervals.

  The communication control unit 134 controls communication using the transmission / reception unit 110 and the timer unit 120 according to the detection result from the detection unit 132.

  Here, when the CS call restriction information is detected by the detection unit 132, that is, when it is determined that the CS call restriction is present, the communication control unit 134 uses the CS call confirmation timer 121 for a predetermined time (Tc). The waiting for CS call communication and broadcast information by the transmission / reception unit 110 is stopped, and after a predetermined time (Tc), the standby state of the broadcast information via the transmission / reception unit 110, that is, CS call communication regulation (DSAC) can be confirmed. Put it in a state.

  In particular, when only the CS call restriction information is detected by the detection unit 132, the communication control unit 134 uses the PS call start timer 122 to perform a PS call performed via the transmission / reception unit 110 for a predetermined time (Tp). The communication is stopped, and after a predetermined time (Tp), PS call communication is performed using the transmission / reception unit 110.

  In addition, when the detection unit 132 detects PS call restriction information, the communication control unit 134 stops PS call communication via the transmission / reception unit 110 by executing the offline mode.

  Further, the communication control unit 134 determines the predetermined time (Tc) stored in the CS call confirmation timer 121, that is, a predetermined time until the notification information is awaited, and the predetermined time stored in the PS call start timer 122. The time (Tp), that is, the time until the PS call communication is performed is compared.

  In addition, when only the CS call restriction information is detected by the detection unit 132, the communication control unit 134 stops the CS call communication and waits for broadcast information, and after performing PS call communication, the communication offline mode Instead of this, a process of turning off the power of the terminal itself may be performed.

  As described above, when the broadcast information includes the CS call restriction information and the PS call restriction information, the control unit 130 uses the timer unit 120 to control the transmission / reception unit 110 to perform a predetermined time (Tc). In the meantime, the CS call communication is stopped and the PS call communication is stopped for a predetermined time (Tp). After the predetermined time elapses, only the PS call communication is performed, and then the PS call communication offline mode is executed again.

  Next, the operation of mobile communication terminal 100 according to Embodiment 1 will be described. FIG. 2 is a flowchart showing the operation of mobile communication terminal 100 according to Embodiment 1 of the present invention.

  As shown in FIG. 2, first, the control unit 130 of the mobile communication terminal 100 controls the transmission / reception unit 110 to enter a notification information standby state (S101).

  In the notification information standby state, the control unit 130 receives the notification information from the radio base station (group) 200 via the transmission / reception unit 110 (S102).

  Next, in the detection unit 132, the control unit 130 detects restriction information in the received broadcast information, that is, determines whether there is DSAC (CS call restriction information) in the received broadcast information (S103). ).

  When there is no CS call restriction information as a result of determination by the detection unit 132, that is, when the restriction is not restricted to only the CS call (S103: NO “No CS call restriction or PS call restriction”), the control unit 130 Returning to standby (S104), the process is terminated.

  Here, normal standby is standby in which CS call communication is possible, and means a state before restriction of reception of broadcast information, CS call communication, and PS call communication in the mobile communication terminal 100. That is, when the CS call restriction is canceled, the communication control unit 134 performs control for the transmission / reception unit 110 and the like to return the notification information and return the CS call and PS call communication to the state before restriction.

  When the detection unit 132 detects the CS call restriction information, that is, when the CS call restriction is confirmed (S103: YES “CS call restriction exists”), the communication control unit 134 includes each unit related to communication including the transmission / reception unit 110. Is controlled (the communication in the mobile communication terminal 100 is set to the offline mode), and the CS call confirmation timer 121 and the PS call start timer 122 of the timer unit 120 are operated (S105).

  Next, the communication control unit 134 of the control unit 130 determines whether or not the predetermined time (Tc) for CS call confirmation has timed out, that is, has expired (S106).

  When the time stored in the CS call confirmation timer 121 has expired (S106: YES), the timer unit 120 notifies the communication control unit 134 of the control unit 130 that the CS call confirmation timer 121 has expired (S107).

  The communication control unit 134 that has received the notification that the CS call confirmation timer 121 has expired sets the transmission / reception unit 110 in a standby state for notification information, and acquires notification information via the transmission / reception unit 110 (S102).

  If the CS call confirmation timer 121 has not expired (S106: NO), the communication control unit 134 waits for a timer expiration notification from the PS call start timer 122, and when the PS call start timer 122 expires, In other words, after the elapse of a predetermined time (Tp), the communication control unit 134 that has received the notification starts communication of the PS call via the transmission / reception unit 110 and accesses the server to acquire mail, disaster information, and the like. (S108). Here, the communication control unit 134 stops after one communication for the PS call.

  In addition, since the predetermined time (Tc) of the CS call confirmation timer 121 and the predetermined time (Tp) of the PS call start timer 122 can be set to different values, the operation may be switched.

  As described above, the mobile communication terminal 100 receives the broadcast information from the base station, determines CS call restriction based on the DSAC information in the broadcast information, and automatically goes offline when it is determined that the call is CS call restriction. Enter the mode. When entering the offline mode, when a predetermined time elapses, PS call communication is automatically started, and information is acquired from the server via the PS exchange network, and when a predetermined time elapses. The broadcast information is automatically received and the CS call restriction is confirmed.

That is, in the mobile communication terminal 100, the mobile communication terminal 100 that can stand by enters the offline mode when a CS call restriction (DSAC) information is detected from the received broadcast information, and a predetermined time (Tc) has elapsed. After that, the broadcast information is automatically received and the presence / absence of CS call restriction information is confirmed. By checking the presence / absence of the CS call restriction information, it can be confirmed whether or not the offline mode is continued.

  In addition, the presence or absence of PS call restriction information can be confirmed with the detection of CS call restriction information from the broadcast information. As a result, when only the CS call restriction information is confirmed, that is, when there is no PS call restriction, standby for CS call communication, PS call communication, and broadcast information is stopped and the offline mode is set. During this time, after elapse of a predetermined time (Tp), PS call communication is started, at least one PS call communication is performed, and the offline mode is set until the predetermined time (Tc) elapses.

  As a result, when CS calls are regulated, unlike the conventional case, the processing related to PS call communication is not continued, and information is stored in the server by starting PS call communication after a predetermined time (Tp) has elapsed. , You can get the information, and then go into offline mode again.

  Therefore, even in an environment where communication is concentrated in the communication system 300, CS call restriction (DSAC) information which is communication restriction information is included in the broadcast information, and power cannot be secured, the mobile communication terminal 100 Information can be acquired without using wasteful power consumption.

  This is a case where the power supply cannot be secured, such as in a disaster, and when there is a CS call restriction that is communication restriction information, that is, voice communication restriction, that is, only a PS call at the time of CS call restriction can be waited. In this case, PS call communication is set offline, and after a predetermined time during offline, PS call communication is performed and then set offline again. Therefore, at the time of CS call restriction, necessary information can be obtained via PS network by PS call communication, and PS call communication itself is also in an offline mode before and after the necessary information acquisition operation by PS call communication. Because communication is stopped, power consumption can be reduced.

(Embodiment 2)
Next, the operation of the second embodiment will be described. FIG. 3 is a diagram showing a flowchart showing operations in the mobile communication terminal according to Embodiment 2 of the present invention.

  The configuration of the mobile communication terminal according to the second embodiment has the same basic configuration as that of the mobile communication terminal 100 according to the first embodiment, and the processing after the CS call restriction is detected by the communication control unit 134 is different. It is assumed that mobile communication terminal 100 exists within the communicable range of base station apparatus 200, that is, within the cell of base station apparatus 200.

  As shown in FIG. 3, first, the control unit 130 of the mobile communication terminal 100 controls the transmission / reception unit 110 to enter a notification information standby state (S201).

  In the notification information standby state, the control unit 130 receives the notification information from the radio base station 200 via the transmission / reception unit 110 (S202). The radio base station 200 may be a radio base station group.

  Next, in the detection unit 132, the control unit 130 determines communication restriction information in the received broadcast information, that is, determines whether there is DSAC (CS call restriction information) (S203).

As a result of the determination of the communication regulated by the broadcast information, when the restriction is not restricted to only the CS call (S203: “CS call is not restricted or PS call is restricted”), the process returns to normal standby (S204), and the process is terminated. . Here, normal standby is standby in which CS call communication is possible, and means a state before restriction of reception of broadcast information, CS call communication, and PS call communication in the mobile communication terminal 100. That is, when the CS call restriction is canceled, the communication control unit 134 performs control for the transmission / reception unit 110 and the like to return the notification information and return the CS call and PS call communication to the state before restriction.

  When the detection unit 132 detects CS call restriction (DSAC) information, that is, when the restriction of the CS call indicating that the CS call is being restricted is confirmed (S203: “CS call restriction exists”), the control part 130 By starting call communication and accessing the server, e-mail and disaster information are acquired (S205).

  Thereafter, the control unit 130 turns off the mobile communication terminal (S206) and ends the process.

  As described above, the mobile communication terminal according to Embodiment 2 determines the received broadcast information, and when CS call restriction information is detected, that is, when DSAC is detected, CS call and PS call communication. For PS calls, communication is performed at least once before stopping, and then the power is turned off, that is, the terminal is turned off including the CS call communication and PS call communication stop processing.

  That is, when broadcast information is received from the radio base station 200, CS call restriction is determined based on DSAC information in the broadcast information, and at least one PS call communication is performed when it is determined that the call is CS call restriction. After the power is turned off automatically. When the power is turned on again, the notification information is automatically received via the transmission / reception unit 110, the notification information is determined by the control unit 130, and communication control corresponding to the communication regulation is performed.

  As a result, during CS call regulation, by restricting CS call communication, power consumption consumed by CS call communication is reduced, and at least one PS call communication before stoppage is sent to the server by mail, disaster information, etc. If this information is stored, it can be acquired.

  Then, by cutting off the power supply, all functions including the wireless communication function such as standby for notification information, CS call communication, and PS call communication can be stopped. As a result, during the CS call restriction period, not only the waiting for notification information and the CS call communication are not performed, but also the PS call communication is not performed. Therefore, it is possible to reduce the amount of power consumed by PS call communication during CS call regulation.

  The embodiments of the present invention have been described above.

  The mobile communication terminal according to the present invention is not limited to the above embodiments, and can be implemented with various modifications.

  The mobile communication terminal according to the present invention can be installed in a mobile phone in a communication system capable of performing CS call communication and PS call communication, and thereby a mobile phone communication terminal device having the same operation and effect as described above. Can be provided.

  Here, the case where the present invention is configured by hardware has been described as an example, but the present invention can also be realized by software. For example, a function similar to that of the apparatus according to the present invention is realized by describing the algorithm of the communication control method according to the present invention in a program language, storing the program in a memory, and causing the information processing means to execute the algorithm. Can do.

The mobile communication terminal and the communication control method according to the present invention can obtain necessary information even when receiving notification information as communication regulation information in an environment where power is not available, such as at the time of a disaster, and PS power consumption It is useful as a mobile communication terminal in a mobile terminal communication system using a CS network and a PS network.

FIG. 1 is a block diagram showing a configuration of a mobile communication terminal according to Embodiment 1 of the present invention. Flowchart for explaining the operation of the mobile communication terminal according to Embodiment 1 of the present invention. Flow chart for explaining the operation of the mobile communication terminal according to the second embodiment of the present invention.

Claims (5)

A mobile communication terminal whose communication is restricted by broadcast information,
Receiving means for receiving the broadcast information;
Detecting means for detecting CS call restriction information included in the received broadcast information;
A mobile communication terminal comprising communication control means for stopping communication of a CS call and a PS call when CS call restriction information is detected, and causing the PS call to communicate at least once before stopping .   The mobile communication terminal according to claim 1, wherein the communication control means performs at least one communication of the PS call at a predetermined interval from when the CS call restriction information is detected.   The mobile communication terminal according to claim 1, wherein when the CS call restriction is detected, the communication control means causes the receiving means to receive the notification information at regular intervals after the CS call restriction is detected. The detecting means detects whether or not CS call restriction is released from the broadcast information received at the predetermined interval, and when the CS call restriction is released,
The mobile communication terminal according to claim 3, wherein the communication control means returns the notification information, and the communication of the CS call and the PS call to a state before restriction. A communication control method for a mobile communication terminal whose communication is restricted by broadcast information,
A receiving step for receiving broadcast information;
A detection step of detecting CS call restriction included in the broadcast information received;
A communication control method including a communication control step of stopping communication of a CS call and a PS call when CS call restriction is detected, and causing the PS call to perform communication at least once before stopping.

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