JP2013109684A - Safety information confirmation system, radio base station and portable radio terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To collect the latest safety information in a short time without generating congestion in a network when communication between a safety confirmation server on a center side for collecting the safety information from a portable radio terminal and radio base stations recovers after the communication between both of them becomes impossible during a disaster occurs.SOLUTION: When communication with a safety confirmation server 103 becomes impossible due to the occurrence of a disaster, each radio base station 101 autonomously collects safety information from a portable radio terminal 102 controlled by the own station. At a point of time when the communication with the safety confirmation server 103 recovers, each radio base station 101 consolidates the safety information which has been collected up to the time and collectively transmits the consolidated safety information to the safety confirmation server 103.

Description

  The present invention relates to a technique for confirming the safety of a user using a portable wireless terminal when a disaster occurs, and in particular, between a center server that collects safety information due to a disaster and a radio base station in a disaster area. Even if communication is not possible, the wireless base station in the disaster area autonomously collects user safety information from mobile wireless terminals in its communication area, and congestion is restored when communication with the center server is restored. The present invention relates to a safety information confirmation system, a radio base station, and a portable radio terminal for promptly providing the latest safety information while suppressing the occurrence of the above.

  As a technique for confirming the safety of a user using a portable wireless terminal (hereinafter simply abbreviated as a wireless terminal or simply a terminal) when a disaster occurs, for example, Patent Document 1 discloses that a location from a center server to a disaster area A technique for making a call to each registered mobile phone and collecting a safety response from a user is disclosed. Further, for example, Patent Document 2 discloses a technique in which each wireless terminal that has received emergency disaster information or a safety confirmation command confirms the safety of a user and transmits it to a safety confirmation site on the center side.

  In addition, for example, in Patent Document 3, when the distribution of information to be distributed from the center apparatus to the wireless terminal is interrupted due to a network failure at the time of a disaster or the like, the evacuation map of the own station stored in advance in the wireless base station A technique for distributing information to subordinate wireless terminals is disclosed.

JP 2001-168990 A JP 2009-253776 A JP 2007-181027 A

  When a network failure occurs due to the occurrence of a disaster and communication between the center side and the radio base station (hereinafter abbreviated as a base station) becomes impossible, the safety confirmation method as described above When the communication with the base station is restored, the collection of safety information is resumed all at once. However, the method of sequentially calling each terminal from the center server as in Patent Document 1 has a problem that it takes a long time to collect safety responses from all terminals. In addition, in the method of transmitting safety information from each terminal by transmitting from each terminal as in Patent Document 2, congestion is generated at the base station or the center side because transmission is performed from many terminals all at once. As a result, there is a problem that the communication efficiency is lowered and the entire network is also adversely affected.

  The present invention has been made to solve the above-mentioned problem, and after the communication between the center server and the base station that collects safety information in the event of a disaster becomes impossible, the communication between the two is restored. An object of the present invention is to provide a safety information confirmation system, a radio base station, and a portable radio terminal that can collect the latest safety information in a short time without causing congestion in the network.

  In order to achieve the above object, the safety information confirmation system according to the present invention enables each base station to autonomously subordinate to its own station when communication with the center server is interrupted or unstable due to a disaster. The safety information is collected from the terminal, and when the communication with the center server is restored, the safety information collected so far is collected and transmitted to the center server in a lump. As a result, it is possible to shorten the time required until the collection of the safety information is completed after the communication with the center server is restored.

  In addition, when the base station according to the present invention collects safety information from all terminals in the communication area of the local station, the base station divides the terminals into predetermined groups and transmits the safety information in order, and then communicates with the center server. When it was impossible, the wave was temporarily stopped. As a result, the occurrence of congestion in the base station can be prevented, and terminals in the communication area of the own station can be easily handed off to other base stations.

  In addition, the mobile wireless terminal according to the present invention prompts the user to input safety information immediately after receiving a safety confirmation instruction from a certain base station, and temporarily stores the input safety information in the storage unit. Until it is confirmed that the safety information transmitted to the base station is notified to the center server, the safety information is transmitted to other communicable base stations that have received the safety confirmation instruction thereafter. To do. Thereby, safety information can be notified to the center server via a plurality of communication paths.

  According to the present invention, when communication between the center server that collects safety information and a base station becomes impossible after a disaster occurs and communication between the two is restored, the latest information is generated without causing congestion in the network. It is possible to provide a safety information confirmation system, a radio base station, and a portable radio terminal that can collect safety information in a short time.

It is a figure which shows the structural example of the safety information confirmation system by this invention. It is a block diagram which shows the structural example of a radio | wireless terminal. It is a block diagram which shows the structural example of a base station. It is a sequence diagram which shows generation | occurrence | production of the call concentration in a conventional system. It is a sequence diagram which shows the normal communication procedure in the safety information confirmation system by this invention. It is a sequence diagram which shows a communication procedure when communication between a center server and a base station becomes impossible in the safety information confirmation system by this invention. It is a state transition diagram which shows the change of the operation mode of a base station. It is a flowchart which shows operation | movement when a base station is in online safety information collection mode. It is a flowchart which shows operation | movement when a base station is in autonomous safety information collection mode. It is a structure and data example of the aggregation safety information stored in the safety information aggregation part of a base station. It is a flowchart which shows operation | movement when a terminal receives a safety confirmation instruction | indication. It is a flowchart which shows operation | movement when a terminal receives a safety response request. It is a flowchart which shows operation | movement when a terminal receives a notification completion list. It is a flowchart which shows operation | movement when a terminal receives safety confirmation cancellation | release. It is a structure and data example of the safety information stored in the safety information storage part of a terminal. It is a structure and data example of RSSI information stored in the RSSI information storage part of a terminal. It is a display example of the safety information confirmation recording screen displayed on the terminal.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings as appropriate. The embodiment of the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention.

<Embodiment 1>
FIG. 1 is a diagram showing a configuration example of a safety information confirmation system according to the present invention. As shown in FIG. 1, a safety information confirmation system 100 includes base stations 101A and 101B, wireless terminals 102x and 102y, a safety confirmation server (hereinafter also referred to as a center server) 103, a safety information database 104, and a center station 105. It is prepared for.

  The base stations 101A and 101B are connected to the center station 105 via a wide area line and configured to be able to communicate with a safety confirmation server 103 installed on the center side. The safety confirmation server 103 registers the safety information of users collected from the wireless terminals 102x and 102y in the event of a disaster or the like in the safety information database 104, and responds to requests from other users not shown in the safety information database 104. The safety information of users registered in is provided.

  In such a system, for example, when communication between the base station 101A and the center station 105 is interrupted or becomes unstable due to the occurrence of a disaster, the control unit of the base station 101A switches the operation to an autonomous safety information collection mode and serves as a storage processing unit. Is activated, and a signal instructing execution of safety confirmation is transmitted to all wireless terminals existing in the communication area of the local station. Receiving this signal, the wireless terminals 102x and 102y prompt the user to input safety information, transmit the safety information input in accordance with the call restriction instruction from the base station 101A to the base station 101A, and automatically transmit the safety information. The information is temporarily stored in the storage unit of the terminal (safety information storage unit 206 described later with reference to FIG. 2).

  Here, since the wireless terminal 102x is also within the communication area of the base station 101B, the wireless terminal 102x also receives a signal instructing execution of safety confirmation from the base station 101B. And according to the instruction | indication of the transmission control from base station 101B, the safety information temporarily stored in the memory | storage part of the own terminal previously is read and transmitted to base station 101B. As a result, the safety information input to the wireless terminal 102x is notified to the safety confirmation server 103 via the base station 101B in which communication with the center station 105 is not interrupted.

  On the other hand, since the wireless terminal 102y is only in the communication area of the base station 101A, the input safety information is the safety information as the transmission processing unit when the communication between the base station 101A and the center station 105 is restored. By the information aggregating unit, the information is transmitted to the safety confirmation server 103 together with the safety information of other terminals. At this time, since the safety information collecting unit of the base station 101A has already collected the safety information from each terminal, the time required for collecting the safety information after the communication recovery can be shortened compared to the conventional system.

  FIG. 2 is a block diagram illustrating a configuration example of a wireless terminal. As shown in FIG. 2, the wireless terminal 102 converts an RF (Radio Frequency) unit 201 that transmits and receives radio waves to and from the base station, and a radio signal that is transmitted and received by the RF unit 201 and a data format inside the apparatus. A baseband unit 202, a control unit 203 that analyzes the received data converted by the baseband unit 202 and controls the operation of the entire apparatus and communication with the base station, and an RSSI that indicates the strength of radio waves received from each base station (Received Signal Strength Indicator) The RSSI information storage unit 204 for storing values and the like, when receiving a safety confirmation instruction signal from the base station, prompts the user to input the safety and transmits the input safety information to the base station And a safety information response unit 205 to be stored in the safety information storage unit 206, and a safety information storage unit 206 for storing the safety information input by the user. .

  FIG. 3 is a block diagram illustrating a configuration example of the base station. As shown in FIG. 3, a base station 101 includes an RF unit 301 that transmits and receives radio waves to and from the wireless terminal 102, and a baseband unit that converts radio signals transmitted and received by the RF unit 301 and the data format inside the apparatus. 302, control unit 303 that analyzes the reception data converted by the baseband unit 302 and controls the operation of the entire base station and the communication between the wireless terminal 102 and the device on the center station side. A storage processing unit that aggregates safety information collected from wireless terminals 102 in the area and transmits it to the safety confirmation server 103, a safety information aggregation unit 304 as a transmission processing unit, a satellite line 306 that performs communication using satellite communication, a wired A wide area line 307 that performs communication using a cable, and a line changeover switch (SW) 30 that switches a communication path to either the satellite line 306 or the wide area line 307. It is configured to include a.

  FIG. 4 is a sequence diagram showing the occurrence of call concentration in the conventional system. In the conventional system described in Patent Document 2, a safety confirmation server 103 is provided on the center side. When a disaster occurs, a safety information collection instruction is transmitted from the safety confirmation server 103 to the base station 101 in the disaster area, and the base station 101 that has received the instruction transmits a safety response instruction to all terminals 102 existing in the communication area of the local station. Is broadcast. Therefore, the safety responses transmitted from the plurality of terminals 102 to the safety confirmation server 103 are processed in the order of arrival, and congestion due to call concentration is likely to occur. As a result, there is a problem that it takes a long time to finish receiving the safety information from all the terminals, and it becomes impossible to receive the safety information from some terminals.

  FIG. 5 is a sequence diagram showing a normal communication procedure in the safety information confirmation system according to the present invention. When a disaster occurs, a safety confirmation instruction is broadcast to all terminals 102 from the safety confirmation server 103 arranged on the center side via the base station 101 in the affected area, as in the conventional system. After that, the base station 101 transmits a safety response request to each terminal 102 and accepts the safety response while performing transmission restriction (details will be described later), thereby preventing the base station 101 from causing congestion. Furthermore, the base station 101 aggregates the safety information included in the safety response received from each terminal 102 and transmits the aggregated safety information (aggregated safety information) to the safety confirmation server 103 in a lump. As a response, the notification completion list returned from the safety confirmation server 103 is broadcasted from the base station 101 to all the terminals 102, and each terminal 102 refers to the notification completion list so that the safety information transmitted by itself is the safety information. It is confirmed that the confirmation server 103 has been notified.

  As described above, in the safety information confirmation system according to the present invention, each base station 101 collects safety information from each terminal 102 while restricting outgoing calls so that congestion does not occur in the own station, and the collected safety information is displayed. Since it transmits to the safety confirmation server 103 collectively, the call concentration to the safety confirmation server 103 can be prevented. Therefore, the time required for collecting safety information can be shortened compared to the conventional system.

  In addition, since there is a possibility that a call collision may occur even when the aggregated safety information is transmitted from each base station 101 to the safety confirmation server 103, calls are sequentially made from the safety confirmation server 103 to each base station 101. Then, aggregate safety information may be collected.

  FIG. 6 is a sequence diagram showing a communication procedure when communication between the safety confirmation server and the base station becomes impossible in the safety information confirmation system according to the present invention. In this case, the safety information collection instruction transmitted from the safety confirmation server 103 does not reach the base station 101 in the disaster area, but the base station 101 detects that the communication with the center side is interrupted or unstable. Then, the operation of the own station is switched to the autonomous safety information collecting mode, and the safety information is collected from all terminals in the communication area of the own station in the same manner as described above with reference to FIG. Communication interruption or instability may not be detected by the base station 101 itself, but may be notified from the outside. The base station 101 aggregates the collected safety information and temporarily stores it in the storage unit. When the communication with the safety confirmation server 103 is restored, the aggregated safety information temporarily stored in the storage unit is collectively displayed as a safety confirmation server. 103. The subsequent operation is the same as the procedure described above with reference to FIG.

  As described above, in the safety information confirmation system according to the present invention, each base station 101 that has become unable to communicate with the center side autonomously collects safety information from each terminal 102 and communicates with the center side. When the communication is restored, the collected safety information is immediately transmitted to the safety confirmation server 103 at once. Therefore, the time required for collecting safety information can be shortened compared to the conventional system.

  Next, changes in the operation mode of the base station when a disaster occurs will be described. FIG. 7 is a state transition diagram showing changes in the operation mode of the base station. The normal operation state is a normal operation mode when no disaster occurs.

  When a safety information collection instruction is transmitted from the safety confirmation server 103 to the base station 101 due to the occurrence of a disaster, the operation mode of the base station 101 is switched from the normal operation state to the online safety information collection mode. The above-described operation is executed. In addition, in the base station 101 operating in the normal operation state or the online safety information collection mode, when the communication with the center station 105 (and the safety confirmation server 103) is detected, the operation mode of the base station 101 is autonomous. The operation is switched to the safety information collection mode, and the operation described above with reference to FIG. 6 is executed.

  In the base station 101 operating in the autonomous safety information collection mode, when communication recovery with the center station 105 (and the safety confirmation server 103) is detected, the operation mode of the base station 101 is switched to the online safety information collection mode. It is done. When the safety confirmation release is transmitted from the safety confirmation server 103 in the base station 101 operating in the online safety information collection mode, the operation mode of the base station 101 returns to the normal operation state.

  FIG. 8 is a flowchart showing an operation when the base station 101 is in the online safety information collection mode. When the control unit 303 receives a safety information collection instruction from the safety confirmation server (center server) 103, the safety information aggregation unit 304 is activated, and the base station 101 enters an online safety information collection mode.

  In step S801, the safety information aggregating unit 304 first transmits a safety confirmation instruction for instructing the start of safety input by the user to all terminals 102 in the communication area of the local station. Receiving this safety confirmation instruction, each terminal 102 in the communication area prompts the user for safety input by displaying a message on the screen, and temporarily stores the safety input result by the user in the safety information storage unit 206. To do. Here, the safety input result is input by selecting either “OK” indicating that the user is safe or “NG” indicating that some kind of support is required, but more May be provided, or an urgency level or the like may be added.

  As described above with reference to FIG. 4, when the safety information is transmitted from each terminal 102 immediately after receiving the safety input from the user and the safety information is transmitted, it exceeds the simultaneous communication capacity of the base station. Congestion may occur. Therefore, as a congestion prevention measure, the terminal 102 is divided into several groups, and transmission restrictions are performed on a group basis. The method of dividing the terminal 102 into groups is arbitrary, but, for example, a method of dividing the terminal 102 into 10 groups according to the last digit value of the telephone number, a range of the telephone number is designated, and divided into an arbitrary number of groups. A method etc. are applicable. The number of groups is preferably set as appropriate according to the simultaneous call capacity of the base station, the assumed number of terminals, or the traffic volume.

  Next, in step S802, the safety information aggregating unit 304 determines whether or not the reception of safety information from all the divided groups has been completed, and if not completed ("No" in step S802), step S803. If the process is completed and the process is completed (“Yes” in step S802), the process proceeds to step S806.

In step S803, the safety information aggregating unit 304 broadcasts a safety response request by instructing a transmission restriction that permits transmission only from a terminal of any group that has not yet been received. Each terminal 102 that has received this safety response request performs a safety response (transmission of safety information) to the base station when the following three conditions are satisfied.
Condition 1: Transmission from the group to which the terminal belongs is permitted Condition 2: There is safety information that has not been transmitted to the base station Condition 3: Notification of the safety information to the center server has not been completed

  In addition, each terminal 102 to which safety input is not performed by the user indicates that safety has not been input when a certain time (for example, 1 minute) has elapsed since transmission from the group to which the terminal 102 belongs is permitted. Transmit to the base station 101.

  In step S804, the safety information aggregating unit 304 receives the safety information transmitted from each terminal 102 for a predetermined period (eg, 3 minutes), and in the subsequent step S805, aggregates the received plurality of safety information. After saving in the storage unit, the process returns to step S802.

  On the other hand, in step S806, the safety information aggregating unit 304 transmits the aggregated safety information stored in the storage unit at that time to the center server 103, and in the subsequent step S807, a notification returned from the center server 103. The completion list is broadcast to all terminals 102 in the communication area of the local station. This notification completion list includes the ID information of the terminal for which the notification of the safety information to the center server 103 has been completed, and each terminal 102 that has received this information includes its own ID information in the list. Then, the fact that the notification of the safety information to the center server is completed is registered in the safety information storage unit 206.

  FIG. 9 is a flowchart showing an operation when the base station 101 is in the autonomous safety information collection mode. When the control unit 303 detects that communication with the center station 105 is interrupted or unstable due to the occurrence of a disaster, the safety information aggregating unit 304 is activated and the base station 101 enters an autonomous safety information collection mode. Of the operations when the base station 101 enters the autonomous safety information collection mode, the operations from step S811 to step S815 are the same as the operations from step S801 to step S805 in FIG. Is omitted.

  When reception of safety information from all groups is completed (“Yes” in step S812), the safety information aggregating unit 304 instructs the control unit 303 to stop in step S816, and then ends the process. In this way, it is easy to hand off a terminal in the communication area of the local station to another base station by temporarily stopping the wave after collecting safety information from all terminals in the communication area of the local station. can do.

  The operation of FIG. 9 is repeatedly executed every time a predetermined time (for example, 30 minutes) elapses, and a new terminal is added to the communication area of the own station, or new input or change of safety information by the user is performed. When it is performed, the latest safety information transmitted from those terminals is received and collected.

  When the communication with the center station 105 is restored, the base station 101 switches from the autonomous safety information collection mode to the online safety information collection mode, and the safety information collected at that time is stored in the center by the operation of FIG. It is transmitted to the server 103.

  FIG. 10 shows a configuration and data example of the aggregated safety information stored in the safety information aggregating unit 304 of the base station. As shown in FIG. 10, in the aggregated safety information, records including the transmission time, the terminal ID, the confirmation time, the safety input result, and the notification completion to the center server are registered by the number of the received safety information.

  The transmission time is the time at which a safety confirmation instruction is broadcast to all terminals. The terminal ID is identification information given to each terminal 102. The confirmation time is the time when safety is input by the user, or the time when information not yet input is received from the terminal 102 when safety is not input. The safety input result is a result of the safety input received from the user, and “−” is stored when the safety is not input. Completion of notification to the center server indicates a state of whether or not the notification to the safety confirmation server (center server) 103 has been completed. “Yes” indicates that the notification has been completed, and “No” indicates that the notification has been completed. Indicates not completed.

  Next, the operation of the wireless terminal 102 will be described in detail with reference to FIGS. FIG. 11 is a flowchart showing an operation when the terminal receives a safety confirmation instruction. In step S901, when the terminal 102 receives the safety confirmation instruction transmitted from the base station 101, in step S902, a safety input from the user is received by displaying a message on the screen. In step S903, it is determined whether or not the input from the user is completed. If the input is completed (“Yes” in step S903), the process proceeds to step S904, and the safety input result is stored in the safety information storage unit 206. Temporarily store. If the input is not completed within a predetermined time (“No” in step S903), the process is terminated.

  FIG. 15 is a configuration and data example of the safety input result temporarily stored in the safety information storage unit 206 of the terminal. As shown in FIG. 15, the safety input result includes a safety confirmation instruction reception time, an input time, a safety input result, and completion of notification to the center server.

  The safety confirmation instruction reception time is the time when the safety confirmation instruction transmitted from the base station 101 is received. The input time is the time when the terminal 102 accepts the safety input from the user. The safety input result is a result of the safety input received from the user. The result of the safety input can be read or updated by the user at an arbitrary time. The completion of notification to the center server indicates whether or not the notification to the safety confirmation server (center server) 103 is completed. “Yes” indicates that the notification is completed, and “No” indicates that the notification is completed. Indicates that is not completed. The notification completion field to the center server is used to determine whether or not to transmit the safety input result to the base station 101.

  FIG. 12 is a flowchart showing an operation when the terminal receives a safety response request. When the control unit 203 of the terminal 102 receives the safety response request transmitted from the base station 101 in step S911, the RSSI information storage unit indicates that the safety response request has been received from the base station 101 in step S912. 204.

  FIG. 16 is a configuration and data example of RSSI information stored in the RSSI information storage unit 204. As shown in FIG. 16, has the RSSI information received the base station ID, RSSI value, and safety response request? Is it safe to respond? Records of (response time) are registered as many as the number of base stations 101 detected by the terminal. The base station ID is identification information of the base station transmitted from each base station 101. The RSSI value is a value indicating the reception intensity of a radio wave transmitted from the base station 101. Was a safety response request received? Indicates whether a safety response request from the base station 101 has been received. Is the safety response completed? (Response time) indicates whether the safety information has been responded to the base station 101 (Yes) and the response time.

  In step S912, the control unit 203 registers the RSSI value at that time in the record of the RSSI information corresponding to the base station 101 that has transmitted the received safety response request, and has the safety response request been received? Register “Yes” in the column.

  In subsequent step S913, the safety information response unit 205 determines whether or not safety has been input. If it has been input (“Yes” in step S913), the process proceeds to step S914, and if it has not been input (in step S913). “No”) The process proceeds to step S918. At this time, if the safety input result (see FIG. 15) is temporarily stored in the safety information storage unit 206, it is determined that the safety has been input. If no input has been made, the process proceeds to step S918 after waiting for a certain time (for example, 1 minute) to elapse. In step S918, after waiting for the transmission from the group to which the terminal belongs is permitted, the fact that safety is not input is transmitted to the base station 101, and the process is terminated.

  In step S914, the safety information response unit 205 refers to the notification completion column to the center server of the safety input result (see FIG. 15) to determine whether or not the notification to the safety confirmation server (center server) 103 has been completed. If the notification is completed (“Yes” in step S914), the process is terminated. If the notification is not completed (“No” in step S914), the process proceeds to step S915.

  In step S915, the safety information response unit 205 determines whether or not the safety information has been responded to the base station 101. If the response has been completed (“Yes” in step S915), the process ends. (“No” in step S915) The process proceeds to step S916. At this time, has the safety response completed for the RSSI information (see FIG. 16) corresponding to the base station 101 stored in the RSSI information storage unit 204? By referring to the (response time) column, it is determined whether or not the safety information has been responded.

  In step S916, after waiting for transmission from the group to which the mobile station belongs, the safety information response unit 205 temporarily stores the safety input result (see FIG. 15) in the safety information storage unit 206. In step S917, is the safety response of the corresponding RSSI information (see FIG. 16) completed? “Yes” and the current time are registered in the (response time) column, and the process is terminated. Note that “automatic” is added to the right of the response time in FIG. 16 because the safety information input in response to the safety confirmation instruction received from another base station is automatically (re-entered). It indicates that it was also transmitted to another base station (without performing it).

  FIG. 13 is a flowchart showing an operation when the terminal receives the notification completion list. In step S921, when the control unit 203 of the terminal 102 receives the notification completion list transmitted from the base station 101, the control unit 203 delivers the list to the safety information response unit 205. Next, in step S922, the safety information response unit 205 determines whether or not the terminal ID of the terminal itself is registered in the list. If not registered ("No" in step S922), the process is terminated. If registered (“Yes” in step S922), the process proceeds to step S923.

  In step S923, “Yes” is registered in the notification completion column to the center server of the safety input result (see FIG. 15) temporarily stored in the safety information storage unit 206 by the safety information response unit 205, and the process ends. Thereby, the safety information for which the notification to the safety confirmation server (center server) 103 has been completed is not retransmitted to any base station.

  FIG. 14 is a flowchart showing an operation when the terminal receives the safety confirmation cancellation. In step S931, when the control unit 203 of the terminal 102 receives the safety confirmation cancellation transmitted from the base station 101, the control unit 203 notifies the safety information response unit 205 to that effect. Next, in step S932, the safety information response unit 205 notifies the user that the safety confirmation has been canceled, such as by displaying a cancellation message on the screen. In the subsequent step S933, the safety input result (see FIG. 15) temporarily stored in the safety information storage unit 206 is initialized, and the process ends.

  FIG. 17 is a configuration and display example of the safety information confirmation recording screen displayed on the terminal. This screen is for transmitting to the user who has already confirmed the safety input result input by the user of the terminal 102 and who has not yet confirmed the safety input result. The information which is inquired and responded to the safety confirmation server 103 is displayed.

  It is assumed that the other party who can provide the safety information of each user is registered in advance in the safety confirmation server 103, and additional user registration from the terminal 102 is also possible. As a method for notifying safety information to registered users, it is common to present safety information from the safety confirmation server 103 in response to a request from the registrant. When the information is received, a mail may be transmitted from the safety confirmation server 103 to the mail address of the registrant for notification.

<Embodiment 2>
Subsequently, on the premise of the safety information confirmation system described in the first embodiment, the base station that has become unable to communicate with the safety confirmation server on the center station side transmits aggregated safety information using communication means other than the wide area line. The form to perform is demonstrated.

  In the safety information confirmation system 100 illustrated in FIG. 1, the base stations 101 </ b> A and 101 </ b> B are connected to the center station 105 through a wide area line during normal operation, and communicate with the safety confirmation server 103. As shown in FIG. 3, each base station 101 includes a satellite line 306 as a backup line when communication through the wide area line 307 is interrupted, and the communication path can be switched by a line changeover switch (SW) 305. It is configured to be able to.

  If communication with the center station 105 via the wide area line 307 becomes impossible due to a disaster or the like, the base station 101 switches the communication path from the wide area line 307 side to the satellite line 306 side to establish a communication with the safety confirmation server 103. Communicate. However, since the communication speed of the satellite line 306 is lower than that of the wide area line 307, if a plurality of base stations 101 access the safety confirmation server 103 at the same time, there is a possibility that the communication band is insufficient and congestion occurs. Therefore, when the satellite line 306 is used, it is desirable to collect the aggregated safety information by sequentially calling each base station 101 whose communication is cut off from the safety confirmation server 103 side. Furthermore, it is more preferable to reduce the data amount of the aggregated safety information to be transmitted by performing data compression processing at the base station 101.

100 Safety information confirmation system 101, 101A, 101B Wireless base station (base station)
102, 102x, 102y portable wireless terminal (wireless terminal, terminal)
103 Safety confirmation server (center server)
104 Safety information database 105 Center station 201 (terminal) RF unit 202 (terminal) baseband unit 203 (terminal) control unit 204 RSSI information storage unit (storage unit)
205 Safety information response unit 206 Safety information storage unit (storage unit)
301 (base station) RF unit 302 (base station) baseband unit 303 (base station) control unit 304 safety information aggregation unit (storage processing unit, transmission processing unit)
305 Line switch (SW)
306 Satellite line 307 Wide area line

Claims (10)

In a mobile communication system comprising a center station connected by a wide area line and a plurality of radio base stations, a safety information confirmation system for collecting safety information of users of portable radio terminals and providing them to other users when a disaster occurs Because
A safety confirmation server for managing the safety information of the user on the center station side;
The radio base station is
When communication with the center station is interrupted or becomes unstable in the event of a disaster, the mobile wireless terminal existing in the communication area of the local station is instructed to transmit the safety information of the user, A storage processing unit that stores the safety information transmitted from the wireless terminal in a storage unit;
A safety information confirmation system comprising: a transmission processing unit that transmits the safety information stored in the storage unit to the safety confirmation server when communication with the center station is restored. In the safety information confirmation system according to claim 1,
The radio base station collects the safety information of the user in units of groups by grouping the mobile radio terminals existing in the communication area of the local station and performing transmission restriction in units of groups. Safety information confirmation system. In the safety information confirmation system according to claim 1 or claim 2,
The portable wireless terminal temporarily stores the safety information input by the user in a storage unit,
Until the notification of the safety information to the safety confirmation server is completed, the safety information temporarily stored in the storage unit is transmitted to other radio base stations that have instructed transmission of the safety information. A safety information confirmation system. In the safety information confirmation system according to any one of claims 1 to 3,
The radio base station stops its own station when the collection of the safety information from the portable radio terminal existing in the communication area of the own station has been completed, and after a predetermined time has elapsed, A safety information confirmation system characterized by recollection. A radio base station of a mobile communication system connected to a center station by a wide area line,
When communication with the center station is interrupted or becomes unstable at the time of a disaster, each mobile radio is instructed to transmit the user's safety information to the mobile radio terminal existing in the communication area of the local station. A storage processing unit that stores the safety information transmitted from the terminal in a storage unit;
When the communication with the center station is restored, the memory is stored in the safety confirmation server that is deployed on the center station side and collects the safety information of the user of the portable wireless terminal and provides it to other users when a disaster occurs. A transmission processing unit for transmitting the safety information stored in the unit,
A radio base station comprising: The radio base station according to claim 5,
The safety information aggregating unit collects the safety information of the user in units of groups by grouping the mobile wireless terminals existing in the communication area of the local station and performing transmission restriction in units of groups. A featured radio base station. In the radio base station according to claim 5 or 6,
The storage processing unit stops the own station when the collection of the safety information from the portable wireless terminal existing in the communication area of the own station is completed, and after the predetermined time has elapsed, A radio base station that performs recollection. In the radio base station according to any one of claims 5 to 7,
A satellite line and a line switch for switching the communication path from the wide area line to the satellite line;
The transmission processing unit transmits the safety information stored in the storage unit to the safety confirmation server using the satellite line. A portable radio terminal of a mobile communication system comprising a center station connected by a wide area line and a plurality of radio base stations,
When receiving an instruction to collect safety information from the wireless base station, prompt the user of the terminal to input safety information, temporarily store the safety information input by the user in the storage unit,
A portable radio terminal comprising: a safety information response unit that transmits the safety information temporarily stored in the storage unit to the radio base station when an instruction to transmit safety information is received from the radio base station. The portable wireless terminal according to claim 9, wherein
A list of the radio base stations with which the terminal can communicate, and a transmission record of the safety information to each radio base station are stored in a storage unit,
The safety information responding unit is a safety confirmation server for collecting the safety information of the user of the portable wireless terminal and providing it to other users when the safety information transmitted by the safety station is deployed on the center station side and a disaster occurs. When receiving a safety information transmission instruction from another radio base station before receiving a notification to the effect that it has been notified to, temporarily stored in the storage unit with reference to the safety information transmission record A portable radio terminal that transmits the untransmitted safety information to the other radio base station.

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