JP5657909B2 - Mobile communication terminal - Google Patents

Description

  The present invention relates to a mobile communication terminal, and more particularly, to a mobile communication terminal that acquires and uses an earthquake early warning.

  The present invention relates to a mobile communication terminal such as a mobile phone and a mobile communication system, and more particularly to a mobile communication terminal equipped with a public alarm system reception function including emergency information such as an emergency earthquake warning.

  Recently, some mobile communication terminals are equipped with an emergency earthquake warning function. Further, in 3GPP, Non-Patent Document 1 and the like define a method of distributing emergency information in the event of a disaster such as an earthquake or a tsunami using PWS (Public Warning System) or “ETWS (Earthquake and Tsunami Warning System)”.

  FIG. 1 shows a schematic configuration of a communication system for notifying emergency information such as an earthquake early warning. As shown in FIG. 1, the emergency distribution server 1 notifies the mobile communication terminal 10 of the earthquake early warning via the mobile communication network 2 and the server 3 based on the observation and prediction data from the Japan Meteorological Agency. With this system, the user of the mobile communication terminal 10 can recognize how many seconds and how many minutes the earthquake will occur and help prepare for a disaster.

  In ETWS, information “Primary Notification” (emergency information) only for the first occurrence and detailed information “Secondary Notification” are notified for the second and subsequent times.

  Also, in a LTE (Long Term Evolution) mobile communication terminal, the reception time up to the first time is improved as compared with W-CDMA, and therefore it is required to perform subsequent information transmission reliably.

  On the other hand, Patent Document 1 discloses a wireless distribution system using multi-broadcast communication. In this wireless distribution system, an alarm signal such as an emergency earthquake warning can be reliably transferred. However, Patent Document 1 does not consider inconveniences that occur to the user after receiving an alarm signal.

JP 2008-199131 A

NTT DOCOMO Technical Journal VOL17 No. 3

  Since the ETWS described in Non-Patent Document 1 is broadcast information, it cannot be determined by the base station whether the mobile communication terminal has been received. For this reason, the reception opportunity in the mobile communication terminal is currently increased by repeating retransmission of the broadcast information.

  However, even if the reception opportunity at the mobile communication terminal is increased, no consideration is given to the change in the communication state after receiving the broadcast information or the earthquake early warning. For example, the situation is that no measures have been taken to prevent mobile communication terminals from being connected after an earthquake. In particular, calls are more likely to be restricted from the communication infrastructure for avoiding congestion than packet communication, but there is a problem that the user does not know whether or not he / she can connect until trying to make a call. In addition, if a large number of users try to make a call repeatedly when the call cannot be made, the time and the battery of the mobile communication terminal may be consumed, which may cause problems in the subsequent emergency. is there.

  In general, as a countermeasure when a call cannot be made, an announcement that “it is difficult to make” is made when the communication infrastructure restricts. On the other hand, when the terminal itself is out of order, in many cases, it is possible to make a distinction by the difference that no sound can be heard. However, when similar measures are adopted in an emergency, there are many disadvantages. For example, considering the case where a general user uses in an emergency situation, even if no sound is heard, the user may determine that the other party is a call destination or communication infrastructure restriction and repeatedly try to make a call. That is, it is necessary to assume a case where the transmission is repeated many times without knowing whether the mobile communication terminal is out of order or the problem of the base station or the other party.

  Furthermore, it is necessary to consider the problem in the emergency bulletin itself that notifies the earthquake early warning. In other words, the contents of the first emergency earthquake bulletin and the second and subsequent emergency earthquake bulletins differ in the emergency bulletin. At the first time, the transmission speed is given the highest priority and only minimum information, for example, the occurrence of an earthquake and the scheduled time of occurrence, is notified. The second and subsequent notifications are useful information after the disaster, such as seismic intensity values and evacuation destination information. Therefore, it is desirable to have a system that can surely receive not only the first time but also the second emergency earthquake warning to the user.

  On the other hand, the mobile communication terminal used by the user cannot transmit / receive to / from the communication infrastructure when the radio wave condition is deteriorated such as out of service area. In addition, the earthquake early warning is notified using signals that can be received by all mobile communication terminals, rather than establishing individual communication with all mobile communication terminals and transmitting information. Therefore, it cannot be determined whether or not the mobile communication terminal has received. For this reason, the earthquake early warning system assumes that the mobile communication terminal cannot be received and resends the earthquake early warning, but reception cannot be guaranteed at all mobile communication terminals.

  That is, even a mobile communication terminal that has received the first earthquake early warning may not be able to receive the second and subsequent notifications, and there is a problem that the mobile communication terminal cannot determine whether or not it has been received. . Insufficient information in an emergency is a very troublesome problem for users, and it is expected that correct information will arrive reliably.

  In addition, if you are a user who knows that there will be a second or later notification in the Earthquake Early Warning, there is also a problem that it is not possible to determine whether there is a failure of your terminal or a problem with the communication infrastructure if the information does not come .

  An object of the present invention is to provide a mobile communication terminal capable of accurately transmitting to a user a change in communication state that occurs after receiving emergency information such as an earthquake early warning.

  According to one aspect of the present invention, an operation test is performed on the communication interface of the mobile communication terminal after receiving the earthquake early warning, and an operation screen that can be transmitted using the operable communication interface is displayed. A mobile communication terminal characterized by displaying the cause even when a subsequent earthquake early warning cannot be received is obtained.

  The mobile communication terminal according to the present invention comprises means for executing a communication interface test, means for preserving the state of the radio wave environment, and means for monitoring timing.

  In the present invention, by confirming the operation status of the mobile communication terminal, it is possible to prompt the presence / absence of a fault and fault isolation after receiving the emergency bulletin and acquisition of information useful in an emergency.

1 is a diagram schematically illustrating an emergency information communication system to which the present invention can be applied. It is a block diagram which shows the structure of the mobile communication terminal which concerns on this invention. 3 is a flowchart for explaining the operation of the mobile communication terminal shown in FIG. It is a flowchart explaining operation | movement of the mobile communication terminal which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of the test result obtained by this invention.

  With reference to FIG. 2, the mobile communication terminal 10 according to the present invention used in the communication system shown in FIG. 1 will be conceptually described. The illustrated mobile communication terminal 10 includes a control unit 12, a timing control unit 13, a display unit 14, an operation unit 15, a wireless LAN communication unit 16, another wireless LAN communication unit 17, in addition to the base station communication unit 11. In addition to a plurality of communication interface units such as other interface units 18, a storage unit 19 is provided. Here, the control unit 12 is actually composed of a CPU, and the operation of the control unit 12 described below is executed by a computer-readable program.

  Here, the base station communication unit 11 has a function of receiving an emergency earthquake bulletin from the base station. The control unit 12 operates the communication interface units such as the base station communication unit 11, the wireless LANs 16 and 17, and other interface units 18 based on the reception of the earthquake early warning and the execution timing from the timing control unit 13. Check for presence. In addition, the control unit 12 displays the confirmation result on the display unit 14.

  That is, when the mobile communication terminal 10 according to the embodiment of the present invention receives the earthquake early warning from the control unit 12, the mobile communication terminal 10 performs an operation test on the plurality of communication interface units 11 to 18, and Among them, a communication interface unit capable of communication is displayed on the display unit 14. For this reason, the user can start communication with a desired partner without having to search for a communicable communication interface unit only by referring to the communicable communication interface unit displayed on the display unit 14. There is no need to repeat outgoing calls.

  On the other hand, in the case of a temporary stoppage of communication infrastructure due to a power failure, displaying the stoppage of communication infrastructure on the display unit 14 may waste the battery in the mobile communication terminal due to repeated useless transmissions. In addition, it is possible to avoid a situation in which the battery on the mobile communication terminal side is dead when the communication infrastructure is restored.

  Furthermore, the communication interface unit test timing is determined based on the time information included in the first earthquake early warning received by the base station communication unit 11. As a result, it is possible to determine whether the radio wave environment has deteriorated at the timing after the occurrence of the earthquake or whether the terminal itself has failed. In addition, by monitoring the reception of the second earthquake early warning and monitoring the radio wave environment, the user who has not received the second earthquake early warning can be recognized by the display and encourage the acquisition of useful information during a disaster. It becomes possible.

  With further reference to FIG. 2, a mobile communication terminal 10 according to an embodiment of the present invention will be described. The base station communication unit 11 of the mobile communication terminal 10 has a connection function with the base station 3 for performing mobile communication. More specifically, the base station communication unit 11 performs communication by each communication method of the mobile communication terminal 10, for example, W-CDMA. Therefore, although not shown, a demultiplexer, an oscillator, and a PLL (Phase Locked Loop) circuit are not shown. It is assumed that a modulation / demodulation unit, a spreader / despreader that performs baseband signal processing, and a rake receiver that receives and synthesizes radio waves such as direct waves and reflected waves.

  The control unit 12 has a function of controlling the base station communication unit 11, the timing control unit 13, the display unit 14, and the like. Here, the timing control unit 13 is constituted by a timer, a counter, and the like, and generates an interrupt signal, data notification, etc. when the timing designated by the control unit 12 is reached.

  The illustrated display unit 14 is a display device represented by a liquid crystal display as a user interface. The operation unit 15 is a user input device represented by a button and a keyboard.

  Further, the storage unit 19 stores information on the radio wave environment measured by the base station communication unit 11. Here, various types of storage units can be employed. For example, a ROM (Read Only Memory), a RAM (Random Access Memory), an IC (Integrated Circuit) card, a memory card with or without a copyright function, and a disk device such as a hard disk may be used.

  The illustrated wireless LANs 16 and 17 are assumed to have a wireless communication function based on IEEE 802.11 standards. Further, the Bluetooth 18 performs short-range wireless communication and performs data transmission / reception.

  Although not shown, the base station communication unit 11 constituting the mobile communication terminal 10 has an encoding / decoding unit that encodes a signal to be transmitted and decodes a received signal. In this case, the encoding / decoding unit uses an encoding / decoding method according to each communication method of the mobile communication terminal or a format of transmission / reception data. For example, in the case of transmission / reception data for a voice call, communication is performed using a PCM (Pulse Code Modulation) communication method or an AMR (Adaptive Multi-Rate) communication method.

  Furthermore, the mobile communication terminal 10 is an external interface for inputting / outputting signals, a microphone and a speaker, an image input device such as a CCD (Charge Coupled Device) camera, and communication for connecting to these input / output devices. As a means, a USB (Universal Serial Bus) terminal unit as an interface for data communication is provided.

  Next, with reference to FIGS. 1-3, operation | movement of the communication system in case an emergency earthquake early warning is delivered is demonstrated.

  In FIG. 1, when an earthquake occurs, the first notification from the emergency delivery server 1 is delivered to the mobile communication terminal 10 via the mobile communication network 2 and the base station 3 as an emergency earthquake bulletin. The first earthquake early warning is given to each mobile communication terminal 10 shown in FIG. The first earthquake early warning is received by the base station communication unit 11 of the mobile communication terminal 10 shown in FIG. 2 (step S11).

  For example, when an earthquake early warning based on the ETWS method is received, the base station communication unit 11 can determine that the emergency earthquake early warning exists in the broadcast channel by receiving the paging channel, and the earthquake early warning data itself is based on the broadcast channel. Broadcast information can be decoded and acquired.

  When the earthquake early warning data received by the base station communication unit 11 is given to the control unit 12, the control unit 12 supplies the earthquake arrival time included in the earthquake early warning data to the timing control unit 13 (step S12).

  The timing control unit 13 notifies the control unit 12 when it reaches a predetermined time with respect to the supplied earthquake arrival time (step S13). Here, the predetermined time may be set to be executed at the same time as, for example, zero seconds, that is, the earthquake early warning data reception, or may be set after the time when the earthquake is reached.

  Receiving the notification from the timing control unit 13, the control unit 12 uses the base station communication unit 11 to execute a connection test with the mobile radio communication network (step S14). Specifically, for example, the control unit 12 transmits music to a telephone number that is always in service, and confirms that the wireless protocol is normally completed and the connected audio data is decoded. Or, whether the data received by the mobile communication terminal matches the transmitted data by connecting to the test partner prepared in advance and returning the voice data sent from the mobile communication terminal by the test machine You may confirm by determining whether or not.

  For packet communication, it is only necessary to browse an arbitrary site and confirm that it is normally connected. Similarly, the control unit 12 tests other communication interface units in order. In this case, for example, the control unit 12 executes a connection test for the wireless LAN 16. Check whether the access point is successfully detected. In this case, it is desirable to confirm data transmission / reception to a connection destination site set in advance via the wireless LAN 16.

  Next, the control unit 12 executes a connection test of the other interface unit 18. If there is an external device already connected, send test data and confirm that no error occurs in other interface unit protocols. If there is no connected device, test that the peripheral device search is completed successfully. The control unit 12 controls to display the result on the display unit 14.

  When displaying the test result on the display unit 14, for example, OK or NG may be displayed in the list of communication means as shown in FIG. Further, only communicable means may be displayed. It is also desirable to set the destination in advance on the disaster bulletin board.

  In step S15, the test result as shown in FIG. 5 is displayed, and it is determined by the control unit 12 whether or not the user has selected (ie, pressed) the test result (step S16: Y). When the user selects a test result in step S16, the transmission execution timing based on the test result is measured (step S17), and when the execution timing is reached (step S17), transmission processing using the selected interface unit is performed ( Step S18), the process is terminated.

  With reference to FIG. 4, another embodiment using the mobile communication terminal 10 shown in FIG. 2 will be described. Also in this embodiment, it is assumed that the base station communication unit 11 of the mobile communication terminal 10 has received the first emergency earthquake bulletin of the ETWS system from the emergency distribution server 1 (step S21).

  When the first earthquake early warning is received, the base station communication unit 11 according to this embodiment measures the reception level of the mobile communication network and stores the reception level in the storage unit 19. Usually, since the reception level is normally measured regularly by the base station communication unit 11, the previous measurement information measured before receiving the earthquake early warning may be saved to reduce the processing time (step S22). ).

  Next, when the first earthquake early warning is received, the monitoring timer of the timing control unit 13 is started (step S23).

  This monitoring timer is for monitoring the acquisition of the second emergency earthquake warning, and the monitoring period can be set in advance. The process proceeds to step S25 until the monitoring timer expires (step S24).

  In step S25, the control unit 12 determines whether or not the reception level measurement result periodically measured has deteriorated. When the reception level measurement result becomes worse, the control unit 12 records the radio wave condition NG list in the storage unit 19. When a plurality of cells on the mobile communication network 2 can be seen, it may be recorded when all the cells are below a predetermined threshold (step S26).

  If it is detected in step S25 that the reception level has not decreased, or if the reception level has decreased and is recorded in the radio wave condition NG list in step S26, the second emergency earthquake bulletin 2 in step S27. Whether or not the second time is received is determined by the control unit 12. If the reception level has not decreased, or if the second emergency earthquake warning is received even if the reception level has decreased, the monitoring timer is stopped and cleared in step S28.

  On the other hand, if the second emergency earthquake bulletin cannot be received in step S27, the operation of the control unit 12 returns to step S24 and is repeated until the monitoring timer expires or until the second emergency earthquake bulletin is received. It is. In step S27, when the second earthquake early warning cannot be received, a configuration for generating an alarm may be employed.

  When the monitoring timer expires in step S24, the operation of the control unit 12 proceeds to step S31. That is, if the monitoring timer expires without receiving the second earthquake early warning in step S27, whether the cause of the failure to receive the second earthquake early warning is a problem with the mobile communication terminal itself or transmission The controller 12 performs an operation of determining whether there is a problem in the emergency delivery server 3 on the side.

  First, in step S31, the control unit 12 detects whether the storage unit 19 has a record in the radio wave status NG list. If there is a record in the radio wave condition NG list in the storage unit 19 (step S31: Y), the control unit 12 determines that the second earthquake early warning has not been received due to a decrease in the reception level, and the display unit 14 It is displayed that there is a possibility of failing to obtain the second earthquake early warning (step S32: Y).

  If it is detected that the monitoring timer has expired without receiving the second earthquake early warning, and there is no record in the radio wave status NG list (step S32: No), the control unit 12 notifies the emergency delivery server 3 It is determined that there is a problem or that the second emergency earthquake bulletin has not been transmitted, and the second emergency earthquake bulletin cannot be obtained on the display unit 14 due to a problem caused by the emergency distribution server 3 (Step S33).

  Since the display in step S33 indicates that there is a high possibility that the second earthquake early warning itself is not sent from the emergency delivery server 3, the user does not need to prompt connection for obtaining information. is there.

  Furthermore, in FIG. 5, when the first earthquake early warning is received in step S21 in order to reduce the possibility that it cannot be received, the reception setting of the mobile communication terminal can be changed to shorten the reception level measurement interval. It is. Thus, by shortening the reception level measurement interval, the success rate of transition between base stations of the mobile communication network 2 can be increased, and the broadcast information acquisition frequency can be increased.

  It is also effective to shorten the paging channel reception execution interval when the first earthquake early warning is received in step S21. Since these settings generally lead to an increase in current consumption, it is preferable to return to the normal settings when the second emergency earthquake warning is received, not at all times, but at the timing when the first emergency earthquake warning is received.

  Hereinafter, features of the present invention will be exemplified.

  According to the present invention, it has a communication unit having a function of receiving emergency bulletin, and a control unit that, when receiving the emergency bulletin, determines a radio wave state related to the emergency bulletin and performs control according to the determination result. A mobile communication terminal characterized by the above can be obtained.

  Moreover, according to this invention, the mobile communication terminal provided with the function which selects the interface part which can be communicated according to a judgment result, and shows a contact using the interface which can communicate is obtained.

  Furthermore, according to the present invention, when an emergency bulletin is received, a mobile communication terminal having a function of controlling execution timing for executing determination of a radio wave state can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the mobile communication terminal provided with the memory | storage part which detects a reception level and preserve | saves the information (reception quality information) showing the deterioration of a radio wave state is obtained.

  Further, according to the present invention, a mobile communication terminal having a function of issuing an alarm when a reception level deteriorates can be obtained.

1 Emergency delivery server 2 Mobile communication network
3 Server 10 Mobile communication terminal 11 Base station communication section
DESCRIPTION OF SYMBOLS 12 Control part 13 Timing control part 14 Display part 15 Operation part 16 Wireless LAN communication part 17 Other wireless LAN communication part 18 Other interface part 19 Storage part

Claims (7)

A communication unit having a function of receiving an emergency bulletin; and a control unit that, when receiving the first emergency bulletin, determines a radio wave state related to the emergency bulletin and performs control according to the determination result; , said the first receiving emergency bulletin, the monitors reception timing or receiving level of the radio wave state, a first emergency second mobile communication terminal Ru provided emergency bulletin followed Bulletin,
Furthermore, other communication interfaces other than the communication unit, and a display unit,
When receiving the first emergency bulletin, the control unit tests the radio wave state, determines whether or not communication is possible, and tests the radio wave state of the communication unit and the other communication interface unit, A mobile communication terminal comprising: determining whether communication is possible, displaying the communicable interface unit on the display unit, and preparing for the second emergency bulletin .   2. The control unit according to claim 1, wherein when the first emergency warning is received, the control unit tests the radio wave state to determine whether communication is possible, and further controls timing for executing the radio wave test. A mobile communication terminal comprising a timing control unit provided for the second emergency bulletin. Oite to claim 1 or 2, wherein the control unit is configured with a communication interface capable unit, a mobile communication terminal, characterized in that through the communicable interface unit, also to be displayed on the display unit a contact.   2. The monitoring according to claim 1, further comprising: a monitoring timer that temporally monitors the received radio wave as the radio wave state, and that monitors the received radio wave temporally, and the control unit is monitored by the monitoring timer A mobile communication terminal characterized by detecting a change in the level of the received radio wave in time and preparing for reception of a second emergency bulletin next to the first emergency bulletin according to a detection result. Oite to claim 4, if the level of the received radio wave is detected that temporally deteriorated, comprising a storage unit storing information representing the level deterioration of the received radio wave, the control unit, in the monitoring timer The cause of non-reception of the next emergency bulletin is determined by referring to the information stored in the storage unit when the next emergency bulletin is not received within the monitoring time Body communication terminal. Oite to claim 5, the front Symbol display unit, a mobile communication terminal, wherein the benzalkonium displays the cause of non-reception of the next second emergency bulletin. A communication unit having a function of receiving an emergency bulletin, in addition to the communication unit, provided with a other communication interface, a computer program for controlling a moving body communication terminal having a display unit, the first public alerts When receiving the first emergency bulletin, the step of determining the radio wave condition after the first emergency bulletin, the step of determining the operation after the first emergency bulletin according to the determination result , the test the radio wave state of the communication unit and the other communication interface, to determine whether communication is possible or not, said communication interface capable unit causes display on the display unit, monitors the reception timing or receiving level while, controlling the timing of executing a test of the radio wave, that it has a step provided in the second emergency bulletin following the first public alerts Computer programs that butterflies.

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