WO2008068848A1

WO2008068848A1 - Mobile communication terminal and communication control method

Info

Publication number: WO2008068848A1
Application number: PCT/JP2006/324265
Authority: WO
Inventors: Makoto Hinata
Original assignee: Panasonic Corporation
Priority date: 2006-12-05
Filing date: 2006-12-05
Publication date: 2008-06-12
Also published as: JP4914454B2; JPWO2008068848A1

Abstract

A mobile communication terminal wherein even when broadcast information serving as communication restriction information is received under an environment in which no power supply is available during a disaster or the like, necessary information can be obtained and a saving of power consumption can be sought. The mobile communication terminal (100), the communication of which is restricted by the broadcast information, detects, at a detecting part (132), CS call restriction information included in the broadcast information received by a transmitting/receiving part (110). When the detecting part (132) detects the CS call restriction information, a communication control part (134) halts the communication of CS and PS calls, and uses a PS call confirmation timer (122) to cause the communication of PS call to be performed at least once after a lapse of a predetermined time interval.

Description

Specification

Mobile communication terminal and communication control method

Technical field

TECHNICAL FIELD [0001] 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.

Background art

[0002] Conventionally, a communication system that is powerful with a base station connected to a plurality of communication lines and a plurality of portable wireless telephones (mobile communication terminal devices) connected to the base station via a wireless line has been widely used. .

[0003] 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, and the restriction is applied. Operation to limit the use of communications in mobile radiotelephones is being planned.

[0004] A mobile communication terminal that receives this 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 has continuously received the broadcast information and consumed power. .

[0005] On the other hand, the mobile communication terminal of Patent Document 1 reduces power consumption by changing the reception interval of broadcast information when it becomes impossible to wait due to broadcast information (regulation information). Figure.

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 performed by broadcast information transmitted to a mobile radio telephone. It is known that it can be regulated individually.

[0007] Note that CS call communication is mainly a network for voice communication and transfers information via a CS network having a circuit switched function. PS call communication is It is mainly a network for packet communication and has a packet switched function. It is assumed that information is transferred via a packet switching network.

Patent Document 1: JP 2004-120258 A

Non-Patent Document 1: “Radio Resource Control (RRC) Protocol Specification (TS25.331)” Disclosure of the Invention

Problems to be solved by the invention

[0008] In general, the restriction of communication with respect to mobile radio telephones is mainly CS call communication that mainly performs voice communication.

[0009] In Patent Document 1, whether or not standby is possible is determined based on broadcast information. When standby is not possible, power consumption is reduced by extending the reception interval of broadcast information. When the information is CS call-only restriction (DSAC) information, the mobile radio telephone receiving the information enters 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 a situation where the CS call is restricted and a power supply cannot be obtained, such as during a disaster. There is a problem that it ends up. In addition, Patent Document 1 has a problem that information necessary for external force cannot be obtained until the CS call restriction is lifted.

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 is not obtained, such as at the time of a disaster, necessary information is obtained. It is an object of the present invention to provide a mobile communication terminal and a communication control method that can be obtained and reduce power consumption.

Means for solving the problem

[0011] The mobile communication terminal of the present invention is a mobile communication terminal whose communication is restricted by broadcast information, receiving means for receiving the broadcast information, and 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 for performing communication for the PS call at least once before stopping. The structure to comprise is taken.

[0012] Further, 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, the reception step of receiving broadcast information, and the received broadcast notification The detection step of detecting cs call restriction included in the information, and when CS call restriction is detected, the communication of CS call and PS call is stopped, and the PS call is communicated at least once before stopping. And a communication control step to be performed.

The invention's effect

[0013] According to the present invention, even when power supply is not obtained, such as during a disaster, even when notification information is received as communication restriction information in an environment, necessary information can be obtained by at least one communication of a PS call. Power consumption can be reduced.

Brief Description of Drawings

FIG. 1 is a block diagram showing a configuration of a mobile communication terminal according to Embodiment 1 of the present invention.

FIG. 2 is a flowchart for explaining the operation of the mobile communication terminal according to Embodiment 1 of the present invention.

FIG. 3 is a flowchart for explaining the operation of the mobile communication terminal according to Embodiment 2 of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

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

[0016] (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 within 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 with each other via the radio base station 200.

[0018] 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 wireless base station 200 to the mobile communication terminal 100 in the area. When the mobile communication terminal 100 receives this notification information, the mobile communication terminal 100 is restricted from communicating.

[0019] The communication restriction information included in the broadcast information transmitted from the radio base station 200 to the mobile communication terminal 100 is a voice communication call in which information is transferred by circuit switching (CS). Call and data exchange by packet switching (PS: Packet Switch) It restricts at least one of PS calls that are data communication calls.

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 is a radio base station group consisting of a plurality of radio base stations. Also good. In this case, the broadcast information is transmitted to the mobile communication terminals within the power range of the plurality of radio base stations constituting the radio base station group.

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.

[0022] The transmission / reception unit 110 performs modulation / demodulation and encoding / decoding of a 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 can carry the converted digital signal Modulate to signal. 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, or the transmission / reception unit 110 is registered in the radio base station 200. At the same time, the base 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.

[0025] The CS call confirmation timer 121 confirms the time for confirming the broadcast information, that is, the CS call restriction in the offline mode, which is a mode in which the communication function is stopped (connection of the CS call communication and PS call communication is stopped). For this purpose, the time until the transmission / reception unit 110 is set to the standby state for the notification information is stored, and the time is counted and output to the control unit 130.

[0026] The PS call start timer 122 stores a 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 based on the communication restriction information detected by the determination, the timer unit 120 is used to perform CS call communication or PS call communication via the transmission / reception unit 110. Controls the offline mode that stops the connection and the power-off operation. [0028] Specifically, the control unit 130 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 for controlling the 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.

[0029] Detection section 132 detects at least one of CS call restriction information and PS call restriction information, which is restriction information in broadcast information received via transmission / reception section 110, and transmits the detection result to a communication control section. Output to 134.

[0030] Specifically, the detection unit 132 detects PS call restriction information by detecting CS call restriction (DSAC) information from the broadcast information. Here, when detecting section 132 detects CS call restriction (DSAC) information from the broadcast information received via transmission / reception section 110, PS call communication is not restricted and only CS call communication is restricted. It shall be.

[0031] When detecting unit 132 detects CS call restriction (DSAC) information from the broadcast information, it determines that there is communication restriction for CS call, and if it cannot detect CS call information, it does not restrict CS call communication. Or it shall be determined that there is PS call restriction.

[0032] In addition, the detection unit 132 detects whether or not the broadcast information power received at regular intervals after detecting the CS restriction information is a force that the CS call restriction is released. In other words, the detection unit 132 determines that the CS call restriction has been released when it does not detect the CS call restriction from the broadcast information card received at regular intervals.

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

Here, the communication control unit 134 uses the CS call confirmation timer 121 when the CS call restriction information is detected by the detection unit 132, that is, when it is determined that the CS call restriction exists, for a predetermined time. During the period (Tc), the transmission / reception unit 110 stops waiting for CS call communication and broadcast information, and after a predetermined time (Tc), the broadcast information standby state via the transmission / reception unit 110, that is, CS call communication regulation (DSAC) ) Can be confirmed.

[0035] In particular, when only the CS call restriction information is detected by the detection unit 132, the communication control unit 134 The PS call start timer 122 is used for a predetermined time (Tp) to be performed via the transmission / reception unit 110. Ρ S call communication is stopped, and after the predetermined time (Tp) has elapsed, the PS call communication is performed using the transmission / reception unit 110. I do

[0036] Further, when the PS call restriction information is detected by the detection unit 132, 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 stores the predetermined time (Tc) stored in the CS call confirmation timer 121, that is, the time that is a constant interval until the broadcast information is waited for, and the PS call start timer 122. The predetermined time (Tp), that is, the time until PS call communication is performed is compared.

[0038] Note that 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 the notification information, and after performing the PS call communication, the communication control unit 134 Let ’s switch to offline mode and turn off the device itself.

[0039] As described above, when the broadcast information includes the CS call restriction information and does not include 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. CS call communication is stopped during (Tc) and PS call communication is stopped for a predetermined time (Tp). After the predetermined time has elapsed, only PS call communication is performed and then PS call communication offline mode is resumed. Execute.

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.

[0041] 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 standby state for broadcast information (S101).

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

[0043] Next, in the detection unit 132, the control unit 130 detects the restriction information in the received broadcast information, that is, determines whether or not the received broadcast information includes DSAC (CS call restriction information). (S 103).

[0044] In the control unit 130, when there is no CS call restriction information as a result of the 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 exists") Returns to the normal standby (S104) and ends the process. Here, normal standby is standby that allows CS call communication, and means a state before restriction of reception of broadcast information, CS call communication, and PS call communication in mobile communication terminal 100. That is, when the CS call restriction is canceled, the communication control unit 134 controls the transmission / reception unit 110 and the like to receive broadcast information and return the CS call and PS call communication to the state before restriction.

[0046] When detecting unit 132 detects CS call restriction information, that is, when CS call restriction is confirmed (S103: YES "CS call restricted"), communication control unit 134 causes transmission / reception unit 110 to Each part of the communication unit including the communication is stopped (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, whether or not the force has expired (S106).

[0048] When the time stored in CS call confirmation timer 121 has expired (S106: YES), timer unit 120 notifies communication control unit 134 of control unit 130 that CS call confirmation timer 121 has expired (S107).

[0049] Upon receiving notification of expiration of CS call confirmation timer 121, communication control unit 134 sets transmission / reception unit 110 in a standby state for notification information, and acquires notification information via transmission / reception unit 110 (S102).

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[0050] If CS call confirmation timer 121 has not expired (S106: NO), communication control unit 134 waits for a timer expiration notification from PS call start timer 122, and PS call start timer 122 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 receive e-mails and disasters. Information is acquired (S108). Here, the communication control unit 134 stops after one communication for the PS call.

[0051] Since the predetermined time (Tc) of CS call confirmation timer 121 and the predetermined time (TP) of PS call start timer 122 can be set to different values, the operation may be switched.

[0052] As described above, the mobile communication terminal 100 receives the broadcast information of the base station, determines the CS call restriction based on the DSAC information in the broadcast information, and automatically determines that it is the CS call restriction. Enter offline mode dynamically. When entering offline mode, PS call communication starts automatically when a predetermined time elapses, and information is acquired from the server via the PS exchange network, and a predetermined time elapses. Then, broadcast information is automatically received and CS call restriction is confirmed.

That is, in mobile communication terminal 100, when mobile communication terminal 100 that can stand by detects CS call restriction (DSAC) information from the received broadcast information, mobile communication terminal 100 enters offline mode and is set to a predetermined time ( After Tc), broadcast information is automatically received and the presence of CS call regulation information is confirmed. By checking the presence / absence of this CS call restriction information, it is possible to confirm whether or not the offline mode continuation card is available.

[0054] In addition, the presence or absence of PS call restriction information can be confirmed as CS call restriction information is detected 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, waiting for CS call communication, PS call communication and broadcast information is stopped and the offline mode is set. During this time, after a predetermined time (Tp) elapses, PS call communication is started and at least one PS call communication is performed, and the offline mode is set until the predetermined time (Tc) elapses.

[0055] As a result, while the CS call is restricted, the information is stored in the server when the PS call communication starts after the elapse of a predetermined time (Tp) during which the processing related to the PS call communication cannot be continued unlike the conventional case. If so, the information can be acquired, and then the offline mode is entered again.

[0056] 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 a power source cannot be secured. The terminal 100 can acquire information without using unnecessary power consumption.

[0057] Power supply cannot be ensured during a disaster! / In a dredging environment and when there is a CS call restriction that is communication restriction information, that is, a voice communication restriction, that is, only a PS call at the time of CS call restriction Even if it is possible to stand by, PS call communication is taken offline, and after a predetermined time while offline, PS call communication is performed and then taken offline again. Therefore, when CS calls are restricted, necessary information can be obtained via the PS network by PS call communication, and PS call communication itself is also offline before and after the necessary information acquisition operation by PS call communication. Since this is a mode and communication is stopped, power consumption can be reduced.

[0058] (Embodiment 2) Next, the operation of the second embodiment will be described. FIG. 3 is a flowchart showing the operation of the mobile communication terminal according to Embodiment 2 of the present invention.

[0059] The configuration of the mobile communication terminal according to the second embodiment is the same as that of the mobile communication terminal 1 according to the first embodiment.

It has the same basic configuration as 00, and the processing after the CS call restriction is detected in the communication control unit 134 is different. Mobile communication terminal 100 is assumed to be within the communicable range of base station apparatus 200, that is, within the cell of base station apparatus 200.

[0060] 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 standby state for broadcast information (S201).

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

[0062] 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).

[0063] If it is restricted by broadcast information! If the result of the communication judgment is that only CS calls are not restricted (S2 03: “No CS call restriction or PS call restriction exists”), return to normal standby. (S204), the process ends. Here, the 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 receive broadcast information and return the CS call and PS call communication to the state before restriction.

[0064] When detection section 132 detects CS call restriction (DSAC) information, that is, when the restriction of CS call indicating CS call restriction is confirmed (S203: “CS call restriction exists”), control section The 130 starts PS call communication and accesses the server to acquire e-mail and disaster information (S205).

[0065] Thereafter, the control unit 130 turns off the mobile communication terminal (S206), and ends the process.

[0066] 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, the CS call and PS Stop call communication and at least once for PS calls before stopping Then, turn off the power, that is, turn off the terminal including the CS call communication and PS call communication stop processing.

[0067] That is, when broadcast information from radio base station 200 is received, CS call restriction is determined based on DSAC information in the broadcast information, and at least once when it is determined that the call is CS call restriction After performing PS call communication, the power is automatically turned off. 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.

[0068] Thereby, during CS call restriction, by restricting CS call communication, power consumption consumed by CS call communication is reduced, and at least one PS call communication before stoppage is performed. If information such as e-mail and disaster information is stored in this, it can be obtained.

[0069] After that, 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 waiting for broadcast information and CS call communication are not performed, but also PS call communication is not performed. Therefore, it is possible to reduce the amount of power consumed by PS call communication during CS call restriction.

[0070] The embodiments of the present invention have been described above.

[0071] The mobile communication terminal according to the present invention is not limited to the above embodiments, and can be implemented with various modifications.

[0072] The mobile communication terminal according to the present invention can be mounted on a mobile phone in a communication system capable of performing CS call communication and PS call communication, and thereby a mobile phone having the same effect as described above. A telephone communication terminal device can be provided.

Here, the case where the present invention is configured by nodeware has been described as an example, but the present invention can also be realized by software. For example, an algorithm of the communication control method according to the present invention is described in a program language, and this program is stored in a memory and executed by information processing means, thereby realizing the same function as the apparatus according to the present invention. be able to.

Industrial applicability

[0074] The mobile communication terminal and the communication control method according to the present invention cannot obtain a power source during a disaster, etc. Even when broadcast information is received as communication regulation information in the environment, the necessary information can be obtained and PS power consumption can be reduced. It is useful as a mobile communication terminal in a mobile terminal communication system using a network.

Claims

The scope of the claims

[1] A mobile communication terminal whose communication is restricted by broadcast information,

Receiving means for receiving the broadcast information;

The detecting means for detecting the CS call restriction information included in the received broadcast information, and when the CS call restriction information is detected, the communication of the CS call and the PS call is stopped, and the PS call is stopped. A mobile communication terminal comprising: communication control means for performing communication at least once before.

2. 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.

3. 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.

[4] The detection means detects whether or not the broadcast information power CS call restriction received at the predetermined interval has been released, and when the CS call restriction is released,

4. 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.

[5] 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 a 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 a CS call restriction is detected and causing the PS call to communicate at least once before stopping.