JP2006319555A - Mobile communication terminal, disaster-time communication method, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile communication terminal transmitting and receiving audio/data to/from a specified partner in the same style as communication through a mobile phone network without requiring any special operation performed by a user even when a disaster occurs. <P>SOLUTION: The mobile communication terminal having a mobile phone function and a multi-hop communication function actuates a tuner which receives a radio broadcast or television broadcast on the basis of information included in a control signal transmitted from a base station to detect occurrence of disaster through a received emergency alarm broadcast, actuates the multi-hop communication function in response to the detection of the occurrence of disaster to allow access to the specified partner through an ad hoc network by the multi-hop communication function, and transmits and receives audio or data. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mobile communication terminal, a disaster communication method, a program, and a recording medium. Specifically, the present invention relates to a technology for performing voice and data communication using a mobile communication terminal in a disaster.

  In recent years, in mobile communication, a mobile phone can be used for voice calls, confirms the current position of the mobile phone via GPS (Global Positioning System), and receives FM radio or television broadcasts. As well as being able to use e-mails and browsing web pages, opportunities for use as information terminals have increased, and the range of use of mobile phones has been expanding, and its effective use is expected.

By the way, in the event of a disaster such as a large-scale earthquake, fire, typhoon, flood, etc., call connection requests are often concentrated in the area where the disaster occurs, and connection is often impossible. In such a case, emergency information can be known by switching to radio or television broadcasting.
However, especially when the user himself / herself is in a disaster occurrence area, it is important for the user to know the disaster information, but it is also important to inform the outside (family, friends, etc.) of his / her safety.

To deal with such problems, the cellular phone device of Patent Document 1 normally operates only with the cellular phone function, and performs long wave reception every predetermined period to confirm the presence or absence of a specific signal for emergency. When a specific signal is included, the ID of the own device is transmitted by switching to the long wave transmission function.
Thereby, even in a situation where the communication frequency of the mobile phone device cannot be used due to a disaster, the existence of itself can be informed to the outside.
JP 2003-274450 A

  However, in the technology of Patent Document 1, although the communication frequency of the mobile phone device cannot be used due to a disaster, the existence of itself can be informed to the outside, but communication with a specific partner by voice or data is possible. Cannot be done.

  The present invention has been made in consideration of the above circumstances, and even in the event of a disaster, it is specified in the same manner as communication through a mobile phone network without requiring any special operation by the user. An object of the present invention is to provide a portable communication terminal, a disaster communication method, a program, and a recording medium that can transmit / receive voice / data to / from the other party.

In order to solve the above problems, the present invention has the following configuration.
The mobile communication terminal of the present invention includes a mobile phone function and a multi-hop communication function, and detects a disaster occurrence, a disaster occurrence detection unit, and the multi-hop communication in response to a disaster notification detected by the disaster occurrence detection unit And a disaster mode processing unit that activates the function and performs transmission and reception of voice or data through the ad hoc network by the multi-hop communication function.

The disaster occurrence detection unit detects a disaster occurrence by any of the following.
(1) The occurrence of a disaster is detected based on a control signal transmitted from the base station.
(2) The tuner is activated and the occurrence of a disaster is detected by an emergency warning broadcast received from a radio broadcast or a television broadcast.
In this case, the tuner is activated based on information included in the control signal transmitted from the base station, or activated when the signal from the base station is interrupted, thereby suppressing power consumption.

  However, if an emergency alert broadcast is not received even after a predetermined time has elapsed since the tuner was activated, power consumption can be suppressed by stopping the tuner.

  In the disaster mode processing unit, line congestion is avoided by limiting the destinations for transmission and reception through the ad hoc network. As this restriction, only transmission to the disaster message dial, access to the disaster message board, or access to family members and friends is permitted.

In addition, the function that operates in the following cases is also restricted to reduce power consumption.
(1) In a state where the multi-hop communication function is activated, the mobile phone function is stopped in response to confirmation of disconnection from the base station.
However, since the base station may be able to communicate, the mobile phone function is intermittently activated to check the connection state with the base station.

(2) When the multihop communication function confirms that there is no multihop connection destination, the multihop communication function is stopped.
However, if disconnection from the base station is confirmed, communication will be disabled if the multi-hop communication function is stopped. Confirm that communication can be performed while reducing power consumption.

  In addition, the present invention can also solve the above problems by a program for executing the function of the mobile communication terminal having the above-described configuration or a computer-readable recording medium storing the program.

  According to the present invention, even when a disaster occurs and a base station in a region where the user is located breaks down or a line congestion occurs, communication via the mobile phone network is not required without any special operation by the user. Voice / data can be exchanged with a specific partner in the same way as

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments according to a mobile communication terminal of the invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a mobile communication terminal according to an embodiment of the present invention, in which the mobile communication terminal includes a radio broadcast and television broadcast reception function, a mobile phone function, and a multi-hop communication function. , Including a GPS function, main control unit 10, antenna 11, duplexer 12, tuner 13, mobile phone communication unit 14, audio processing unit 15, audio input unit 16, audio output unit 17, imaging unit 18, image It comprises a processing unit 19, a communication control unit 20, a wireless LAN communication unit 21, a wireless LAN antenna 22, a GPS antenna 23, a GPS receiving unit 24, a light emitting unit 25, an operation unit 26, a display unit 27, a clock unit 28, and a storage unit 29. ing.

  The main control unit 10 is configured by a microcomputer or the like, controls the entire terminal, and performs wireless communication with the base station via radio waves, and transmits and receives not only voice data but also character data and image data. Telephone function, broadcast reception function for receiving radio broadcasts and television broadcasts, multi-hop communication function for transmitting and receiving not only voice data but also text data and image data through an ad hoc network, own terminal based on signals received from GPS communication satellites The GPS function etc. which acquire the positional information on are controlled.

The antenna 11 receives a radio communication radio wave for a mobile phone from a base station and a broadcast wave from a radio or television broadcasting station.
The duplexer 12 separates the radio communication radio wave and the broadcast wave received by the antenna 11 and sends the radio communication radio wave to the mobile phone communication unit 14 in the case of the radio communication radio wave and to the tuner 13 in the case of the broadcast wave.
The tuner 13 separates the broadcast wave into a video signal and an audio signal under the control of the main control unit 10, processes the video signal by the image processing unit 19, and outputs the audio signal to the display unit 27 by the audio processing unit 15. The data is output from the unit 17.

The mobile phone communication unit 14 demodulates the data sent from the duplexer 12 during reception, and modulates and amplifies the data sent from the communication control unit 20 during transmission. Via the antenna 11 to the base station.
The communication control unit 20 sends the data demodulated by the mobile phone communication unit 14 to the main control unit 10 based on a predetermined communication protocol. Of the received data, the audio data is sent to the audio processing unit 15 where the audio processing unit 15 performs digital signal processing, performs amplification processing as necessary, and outputs the result to the audio output unit 17 (speakers, headphones, etc.). . This voice output unit 17 is used not only for the output of received voice data but also for ringtones, incoming calls, key push sounds, and the like. Further, the image data is sent to the image processing unit 19.
Also, the input audio signal input by the audio input unit 16 (microphone) is subjected to digital signal processing by the audio processing unit 15, amplified as necessary, sent to the communication control unit 20, and transmitted to the base station. .

The imaging unit 18 includes an imaging element such as an imaging lens, a CCD (Charge Coupled Device), or a CMOS (Complementary Metal Oxide Semiconductor), and converts the light reflected by the subject and incident on the imaging lens into an electrical signal by the imaging element. To the image processing unit 19.
The image processing unit 19 amplifies the electrical signal sent from the imaging unit 18 or the tuner 13, converts the electrical signal (analog) into a digital signal, performs signal processing such as interpolation processing, and the display unit 27 or The data is sent to the communication control unit 20.

  The wireless LAN communication unit 21 has a multi-hop communication function, converts communication data received from the communication control unit 20 and output from the main control unit 10 in accordance with a predetermined communication protocol, and then transmits a wireless LAN antenna. The communication data transmitted to the ad hoc network by the wireless LAN antenna 22 and received from the ad hoc network by the wireless LAN antenna 22 are converted into data in a form that can be processed by the main control unit 10, and the main control unit 10 is connected via the communication control unit 20 Output to.

  This ad hoc network does not require an access point, and is a network composed only of wirelessly connectable terminals (PCs, PDAs, mobile phones, etc.). Both “wireless ad hoc network” and “self-supporting distributed wireless network” That is what is said. In ad hoc networks, many terminals can be connected to terminals outside the communication range without using an access point, using technologies such as IEEE 802.11x and Bluetooth (registered trademark), which are widely used for wireless connection of computers and other devices. (Multi-hop communication). For this reason, an ad hoc network does not require a base station or access point, and can be constructed at a low cost in a place that does not have infrastructure in the event of a disaster. It is effective as a means of constructing a simple network in a limited area. is there.

The GPS antenna 23 receives microwaves in the L1 band (1575.42 MHz) and the L2 band (1227.6 MHz) transmitted from the GPS satellites and sends them to the GPS receiver 24.
The GPS receiver 24 amplifies the signal from the GPS antenna 23 and sends information such as satellite position information, C / A code, and P code included in the signal to the main controller 10.
Based on the information from the GPS receiving unit 24, the main control unit 10 obtains the distance between at least three GPS satellites and the terminal, and then uses triangulation to determine the position of the terminal (latitude, longitude, (Altitude).
The means for obtaining the position (latitude, longitude, altitude) of the terminal is not limited to GPS. For example, each position (latitude, longitude, altitude) is indicated on a utility pole, a sign, a building, etc. A non-contact IC in which information is stored may be installed, and information indicating the position (latitude, longitude, altitude) may be acquired from the non-contact IC, and the position of the base station ( (Latitude, longitude, altitude) may be acquired and acquired as an approximate position of the terminal itself.

The light emitting unit 25 is turned on when a predetermined operation is performed, and clearly indicates the usage state (normal state or abnormal state such as an error) of the mobile communication terminal.
The operation unit 26 includes a determination key for performing incoming / outgoing calls, switching of telephone functions, operation determination, etc., a mode key for switching various functions, a cursor key for moving a selection target in the up / down / left / right directions, and input of a telephone number, etc. The information for the input key is sent to the main control unit 10.

The display unit 27 is realized by a liquid crystal display, an EL (Electro Luminescence) display, and the like, and displays images and videos processed by the image processing unit 19, various screens sent from the main control unit 10, contents of e-mails, and the like. Is done.
The clock unit 28 is a clock and provides date and time information to the main control unit 10.

The storage unit 29 includes a volatile recording medium or a non-volatile storage medium, and includes a control program and fixed data for controlling the mobile communication terminal, a working storage area, and received or input data (characters, images, video, audio, etc.). , Data such as telephone directory (email address, telephone number, name, etc.), incoming and outgoing history, etc. are stored. Among these, the fixed data includes a region information table that stores a region code and a latitude / longitude indicating the region, indicating which region includes the position information represented by latitude and longitude.
In addition, if the control program and fixed data of the mobile communication terminal are downloaded and rewritten, it becomes possible to easily upgrade functions or change functions.

  In the present invention, when the mobile communication terminal having the above configuration is used at the time of a disaster, the main control unit 10 starts after receiving a disaster occurrence detection unit 110 for detecting whether the terminal is in a disaster area and a disaster notification. The disaster mode processing unit 120 is operated to control the mobile phone function 130 and the multi-hop communication function 140, so that even in a disaster area, no special operation by the user is required. Voice / data can be exchanged with a specific partner in the same way as communication (see FIG. 2).

First, the disaster occurrence detection unit 110 will be described.
There are two ways to learn about disasters.
(1) Disaster occurrence notification from mobile phone base station (see Fig. 3):
When a disaster occurs, a notification of the occurrence of the disaster is issued from the relevant organization at the location where the disaster occurred to each operating company of the mobile communication network.
The operating company transmits a control signal indicating that a disaster has occurred from the corresponding base station at the location where the disaster occurred to each mobile communication terminal.
When the mobile phone communication unit 14 is communicating with the base station, the mobile communication terminal detects this control signal and detects that a disaster has occurred.
The control signal in this case is a start request signal for the multi-hop communication function provided in the mobile communication terminal.

(2) Notification of disaster occurrence from radio broadcast or television broadcast (see FIG. 4 and FIG. 5):
When a disaster occurs, a notification of the occurrence of the disaster is issued from the related organization at the location where the disaster occurred to each operating company or broadcasting station of the mobile communication network.
The operating company transmits a control signal indicating that a disaster has occurred from the corresponding base station at the location where the disaster occurred to each mobile communication terminal. The broadcast station broadcasts a descriptor including an emergency warning broadcast flag that a disaster has occurred.
In the mobile communication terminal, when this control signal is detected while the mobile phone communication unit 14 is communicating with the base station, an emergency warning broadcast flag is included in the descriptor activated by the tuner and broadcast from the broadcast station. The multi-hop communication function is activated by detecting whether a disaster has occurred. In this case, the control signal from the base station is a tuner activation request signal.

  However, in this method, when the base station cannot transmit a control signal due to a disaster, the tuner 13 cannot be activated, and thus an emergency warning broadcast flag from broadcast cannot be received. In this case, the mobile communication terminal determines whether communication with the base station has been interrupted, and starts the tuner 13. However, since communication with the base station may be interrupted by an obstacle such as a tunnel, the tuner 13 is stopped when the emergency warning broadcast is not received even after a predetermined time has elapsed.

Next, the processing procedure of the disaster occurrence detection unit 110 when there is a disaster occurrence notification by broadcasting will be described in detail using the flowchart of FIG.
Usually, the mobile phone function is operating (step S11).
The mobile phone communication unit 14 checks whether a control signal (tuner activation request signal) is included in the signal transmitted from the base station during communication, and if the control signal is included (YES in step S12). ), The tuner 13 is turned on and activated (step S13).
Wait until the tuner 13 is activated (NO in step S14, S12).

When the tuner 13 is activated (YES in step S14), it is checked whether an emergency warning broadcast flag is included in the broadcast wave (step S15).
When the emergency wave broadcast flag is not included in the broadcast wave (NO in step S15), the process waits until the emergency warning broadcast flag is broadcast (step S14).

On the other hand, when the emergency warning broadcast flag is included in the broadcast wave (YES in step S15), the area code of the area where the disaster occurred included in the broadcast wave is extracted (step S16) and received by the GPS receiver 24. Based on the received signal, position information indicating the presence of the terminal is acquired (step S17), and the tuner 13 is turned off to stop receiving broadcast waves (step S18).
If it is determined by referring to the area information table that the location information of the terminal is not included in the area where the disaster occurred (NO in step S19), the process returns to step S12 and waits until there is an emergency warning broadcast.
If the terminal is in a disaster area (YES in step S19), the process proceeds to the disaster processing mode.

On the other hand, if there is communication with the base station and no control signal is transmitted (NO in step S12, NO in S21), the process proceeds to step S14 to monitor the notification of the next control signal.
However, if communication with the base station is not confirmed (NO in step S12, YES in S21), communication from the base station is monitored until a predetermined time elapses because communication may not be possible due to an obstacle (steps S21 and S22). ).

If there is no communication from the base station even after a predetermined time has elapsed (YES in step S22), the tuner 13 is turned on and activated (step S23).
If the broadcast wave has an emergency warning broadcast flag (YES in step S24), the process proceeds to step S16 to check whether the area where the terminal is located is a disaster area.

On the other hand, if there is no emergency warning broadcast flag in the broadcast wave (NO in step S24), it is confirmed whether there is communication from the base station (steps S24, S25, S26).
When communication from the base station is received (NO in step S25), the tuner 13 is turned off to stop receiving broadcast waves (step S27), and the process returns to step S12 and waits until an emergency alarm broadcast is received.

As described above, configuring the disaster occurrence detection unit 110 of the mobile communication terminal has the following effects.
-Since the multi-hop communication function is not activated in the normal state, wasteful power consumption can be suppressed.
-Since the tuner is activated in response to the control signal from the base station, it is not necessary to always activate the tuner, and wasteful power consumption can be suppressed.
-Since the tuner is activated when the signal from the base station is interrupted, it is not necessary to always activate the tuner, so that more wasted power consumption can be suppressed, and even when the base station collapses be able to.

Next, the processing of the disaster mode processing unit 120 will be described in detail using the flowcharts of FIGS.
When the disaster mode is executed, the multi-hop communication function 140 is activated (step S31).
In this multi-hop communication function at the time of a disaster (such as when receiving an emergency broadcast), the activation conditions of the multi-hop communication function are set in detail according to the grasped disaster situation, for example, the bit rate of multi-hop communication during normal use (in normal operation) The bit rate is automatically reduced from 384 kbps) (32 kbps in an emergency, etc.), so that unnecessary power consumption is suppressed.
In addition, routing is performed using a mobile communication terminal with a large amount of remaining battery or a mobile communication terminal mounted on a charging stand, so that communication interruptions are reduced.

Further, by limiting the remaining battery level / time limit / number limit / phone book registrant only, all the people in the disaster area can communicate appropriately.
In addition, mobile communication terminals that can be used at the time of a disaster and mobile communication terminals that cannot be used at the time of a disaster may be set in advance and routed using only the mobile communication terminals that can be used at the time of a disaster.

At this time, the cellular phone function 130 is still operating (step S32).
If the base station does not communicate by checking whether the base station has recovered (YES in step S33), the mobile phone function 130 is stopped because the mobile phone cannot be used (step S34), and there is a multi-hop connection destination. (NO in step S35, S36).
If there is no connection destination for multi-hop communication (NO in step S35, YES in S36), the multi-hop communication function 140 is stopped (step S37), and a predetermined time elapses before returning to step S31. .

On the other hand, when there is a connection destination of multihop communication (YES in step S35), the wireless status of each terminal of the connection destination of multihop communication is displayed on the display unit 27 of the mobile communication terminal (step S41). For example, the network connection state between them is calculated by multiplying the number of hops, coefficients, etc., and displayed as hopping stability.
If the multi-hop communication is successful but a predetermined time has elapsed since the mobile phone function 130 was stopped (YES in step S42), the process returns to step S32 to confirm whether the base station has recovered.

  On the other hand, if the multi-hop communication is successful and the predetermined time has not elapsed since the mobile phone function 130 was stopped (NO in step S42), this communication destination is not connected to the external network (step S43). NO), while performing local communication within the connection destination, the process returns to step S35 and waits until the external network is connected.

On the other hand, if it is connected to the external network (YES in step S43), it is displayed on the display unit 27 which external network is connected (step S45).
It is checked whether there is a request to make a voice call from the user through an IP phone or the like. If there is a call (YES in step S46), it is checked whether the destination is a specific predetermined party (step S47). Here, the specific partner is a family member or a friend registered in the disaster message dial or the phone book of the mobile communication terminal.

If the other party is a specific person (YES in step S47), if this multi-hop communication is compatible with the voice bearer service (YES in step S48), the designated party is dialed. Call and start communication (step S49), and return to step S35 to determine whether the connection of this multi-hop communication is maintained.
As described above, by limiting the voice communication transmitted and received through the ad hoc network, necessary voice and data can be reliably transmitted without delay.

  Further, when the user is not a specific partner (NO in step S47) and the voice bearer service is not provided (NO in step S48), the fact is displayed on the display unit 27 or the light emitting unit 25 is caused to emit light. To notify that an error has occurred (step S50) and return to step S35 to find the next multi-hop communication destination.

If the user makes neither a voice communication request nor a network connection request when connected to the external network (NO in step S51), the process returns to step S35 to determine whether the connection of the multi-hop communication is maintained. .
On the other hand, the user makes a connection request to the external network and confirms whether the connection destination is a specific site (YES in step S51, S52). Here, the specific site is a disaster message board site.

If the connection destination is a specific site (YES in step S52), connection to the specified specific site is started (step S53), and it is determined whether or not the connection of this multi-hop communication is maintained. The process returns to step S35.
In this way, by limiting the data transmitted and received through the ad hoc network, necessary data can be reliably transmitted without delay.

  If it is not a specific site (NO in step S52), the fact is displayed on the display unit 27, or the light emitting unit 25 is caused to emit light to notify that an error has occurred (step S50). The process returns to step S35 to determine whether the hop communication connection is maintained.

  Also, if there is communication from the base station when entering the disaster mode process (NO in step S33), it is checked whether there is a multi-hop connection destination. If there is a connection destination (YES in step S61), The wireless status of each terminal connected to the multi-hop communication is displayed on the display unit 27 of the mobile communication terminal (step S62). For example, the network connection state between them is calculated by multiplying the number of hops, coefficients, etc., and displayed as hopping stability.

It is checked whether there is a request to make a voice call from the user by IP phone or the like. If there is a call (YES in step S63), this multi-hop communication is not using the voice bearer service (step S64). NO), dialing and calling the designated destination to start communication (step S65), and return to step S33 to check whether the base station has recovered.
However, if the voice bearer service is being used (YES in step S64), that fact is displayed on the display unit 27, or the light emitting unit 25 is caused to emit light to notify that an error has occurred (step S66). The process returns to step S33 to check whether the base station has recovered.

When the multi-hop communication is connected, if the user has neither a voice communication request nor a network connection request (NO in step S67), the process returns to step S33 to check whether the base station has recovered.
On the other hand, when the user requests connection to the external network (YES in step S67), connection to the designated site is started (step S68), and the process returns to step S33 to check whether the base station has recovered.

On the other hand, if there is no communication from the base station (NO in step S33) and there is no connection destination for multi-hop communication (NO in step S61), the predetermined time has passed since the communication from the base station was lost. If this is the case (YES in step S69), the multi-hop communication function is stopped (step S70), and the normal mode with only the normal mobile phone function is restored (step S71).
If the predetermined time has not elapsed since the communication from the base station is lost (NO in step S69), the process returns to step S33 to confirm whether the base station has recovered.
As described above, when the multi-hop communication function 140 is stopped, if it is confirmed that the base station is disconnected, the multi-hop communication function 140 is intermittently activated to check the existence of a multi-hop connection destination. As a result, the timing at which communication is possible is not missed.

  As described above, by configuring the disaster mode processing unit 120 of the mobile communication terminal, the mobile phone function and the multi-hop communication function are stopped according to the situation, so that useless power consumption at the time of disaster can be suppressed.

Furthermore, if you access a specific site (disaster message board) or dial a specific party, the multi-hop communication function is stopped, and all terminals in the area have finished accessing the disaster message board. In such a case, by stopping the multi-hop communication function, line congestion at the time of a disaster is reduced.
In addition, when contributing as a repeater, the amount of money contributed, a courier ticket, etc. may be backed, or the multi-hop communication function may be used by itself for the amount of time contributed.

The present invention is not limited only to the above-described embodiments. Each function of the portable communication terminal of the above-described embodiment is programmed, written in a recording medium in advance, and these programs recorded in the recording medium are stored in a computer memory or storage device and executed. Needless to say, the object of the present invention is achieved. In this case, the program itself read from the recording medium realizes the functions of the above-described embodiment, and the program and the recording medium recording the program also constitute the present invention.
In addition, the program includes a case where the functions of the above-described embodiment are realized by processing in cooperation with an operating system or another application program based on an instruction of the program.

Note that the program for realizing the functions of the above-described embodiments includes a disk system (for example, a magnetic disk, an optical disk, etc.), a card system (for example, a memory card, an optical card, etc.), and a semiconductor memory system (for example, a ROM, a nonvolatile memory). Etc.) and a recording medium of any form such as a tape system (for example, magnetic tape, cassette tape, etc.). Alternatively, the program stored in the storage device may be directly supplied from the server computer via the network. In this case, the storage device of this server computer is also included in the recording medium of the present invention.
As described above, by programming and distributing the functions of the above-described embodiment, the cost can be reduced, and the portability and versatility can be improved.

It is a block diagram which shows the structure of the portable communication terminal which concerns on embodiment of this invention. It is a block diagram which shows the structure which operate | moves at the time of a disaster in a main control part. It is explanatory drawing in the case of knowing disaster occurrence by the notification of a control signal from a base station. It is explanatory drawing in the case of knowing disaster occurrence by the emergency alert broadcast from a broadcasting station. It is another explanatory view in the case of knowing the occurrence of a disaster by emergency alert broadcasting from a broadcasting station. It is a flowchart explaining the process of a disaster occurrence detection part. It is a flowchart (the 1) explaining the process of a disaster mode process part. It is a flowchart (the 2) explaining the process of a disaster mode process part. It is a flowchart (the 3) explaining the process of a disaster mode process part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Main control part, 11 ... Antenna, 12 ... Demultiplexer, 13 ... Tuner, 14 ... Cell-phone communication part, 15 ... Audio | voice processing part, 16 ... Audio | voice input part, 17 ... Audio | voice output part, 18 ... Imaging part, DESCRIPTION OF SYMBOLS 19 ... Image processing part, 20 ... Communication control part, 21 ... Wireless LAN communication part, 22 ... Wireless LAN antenna, 23 ... GPS antenna, 24 ... GPS receiving part, 25 ... Light emission part, 26 ... Operation part, 27 ... Display part , 28 ... clock unit, 29 ... storage unit, 110 ... disaster occurrence detection unit, 120 ... disaster mode processing unit, 130 ... mobile phone function, 140 ... multi-hop communication function.

Claims (17)

  A mobile communication terminal having a mobile phone function and a multi-hop communication function, which activates the multi-hop communication function in response to detection of a disaster occurrence, and transmits / receives voice or data through an ad hoc network by the multi-hop communication function A mobile communication terminal characterized by   A mobile communication terminal having a mobile phone function and a multi-hop communication function, a disaster occurrence detection unit for detecting a disaster occurrence, and the multi-hop communication function in response to a disaster notification detected by the disaster occurrence detection unit And a disaster mode processing unit that transmits and receives voice or data through an ad hoc network using the multi-hop communication function.   3. The portable communication terminal according to claim 2, wherein the disaster occurrence detection unit detects the occurrence of a disaster based on a control signal transmitted from a base station.   3. The portable communication terminal according to claim 2, further comprising a tuner that receives a radio broadcast or a television broadcast, wherein the disaster occurrence detection unit detects a disaster occurrence by an emergency warning broadcast that is received by activating the tuner. A characteristic mobile communication terminal.   5. The mobile communication terminal according to claim 4, wherein the disaster occurrence detection unit activates the tuner based on information included in a control signal transmitted from a base station.   5. The mobile communication terminal according to claim 4, wherein the disaster occurrence detection unit activates the tuner in response to the signal from the base station being interrupted.   7. The portable communication terminal according to claim 6, wherein the disaster occurrence detection unit stops the tuner if the tuner does not receive an emergency warning broadcast even after a predetermined time has elapsed since the tuner was activated. A mobile communication terminal characterized by the above.   The mobile communication terminal according to any one of claims 2 to 7, wherein the disaster mode processing unit imposes restrictions on voice or data transmitted and received through an ad hoc network.   9. The mobile communication terminal according to claim 8, wherein the disaster mode processing unit permits only a call to a disaster message dial as the restriction.   9. The mobile communication terminal according to claim 8, wherein the disaster mode processing unit permits only access to a disaster message board as the restriction.   11. The mobile communication terminal according to claim 2, wherein the disaster mode processing unit confirms disconnection of communication with a base station when the multi-hop communication function is activated. A mobile communication terminal characterized by stopping the function.   The mobile communication terminal according to claim 11, wherein the disaster mode processing unit intermittently activates the mobile phone function to check a connection state with a base station.   12. The mobile communication terminal according to claim 2, wherein the disaster mode processing unit stops the multi-hop communication function when it is confirmed that there is no multi-hop connection destination in the multi-hop communication function. A mobile communication terminal characterized by the above.   14. The mobile communication terminal according to claim 13, wherein when the disaster mode processing unit stops the multi-hop communication function and the disconnection of communication with the base station is confirmed, the multi-hop communication function is performed. A mobile communication terminal that is activated intermittently to confirm the presence or absence of a multi-hop connection destination.   In a disaster communication method using a mobile communication terminal having a mobile phone function and a multi-hop communication function, a tuner for receiving a radio broadcast or a television broadcast is received based on information included in a control signal transmitted from a base station. Activating and detecting the occurrence of a disaster in the received emergency alert broadcast, activating the multi-hop communication function in response to the detection of the occurrence of the disaster, sending to the disaster message dial via the ad hoc network by the multi-hop communication function, or A disaster communication method characterized by permitting access to a disaster message board and transmitting or receiving voice or data.   A program that operates on a computer mounted on a mobile communication terminal having a mobile phone function and a multi-hop communication function, the computer detecting the disaster by a disaster occurrence detection unit that detects a disaster occurrence, and the disaster occurrence detection unit A program for activating the multi-hop communication function in response to a received disaster notification and causing the multi-hop communication function to function as a disaster mode processing unit that transmits and receives voice or data through an ad hoc network.   The computer-readable recording medium which recorded the program of Claim 16.

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