JP2015177409A - System, method and program for safety information collection, base station and mobile station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable secure collection of safety information in the event of a disaster, while avoiding a situation that the safety information of a user who holds a mobile station is concentrated in one time period.SOLUTION: A safety information collection system includes: a base station; and a plurality of mobile stations capable of communicating with the base station through a wide-area radio communication network and also communicating with another mobile station through a short-range radio communication network. Sharing processing of a safety information database is executed among a plurality of mobile stations, through the short-range radio communication network. The base station requests the shared safety information database of a predetermined mobile station among the plurality of mobile stations. According to the request, the predetermined mobile station transmits the shared safety information database to the base station.

Description

  The present invention relates to a safety information collection system, a safety information collection method, a safety information collection program, a base station, and a mobile station that collect people's safety information when a disaster such as an earthquake occurs.

  A safety information collection system that collects people's safety information in the event of a disaster such as an earthquake is known.

  For example, Patent Document 1 discloses a safety confirmation in which a mobile terminal that has received an emergency earthquake bulletin mail from a disaster information distribution server transmits a safety information mail including its current location, local telephone number, and password to the disaster information distribution server. The system is described.

  Patent Document 2 discloses a positioning server that transmits disaster emergency information to a mobile terminal that is within the communication range of a base station via a notification channel, and its own location and user safety in response to the disaster emergency information. A disaster safety information collection system including a mobile terminal that transmits safety information including information to a positioning server is described.

JP2013-187580A (Page No. 8-9) JP 2007-087139 A (Page Nos. 6, 10-12)

  Generally, in a safety information collection system, safety information of a mobile station needs to be collected before communication facilities such as a base station are damaged due to an earthquake or the like and communication becomes impossible.

  However, the safety information collection in Patent Document 1 and Patent Document 2 is performed only through the cellular communication network. In a cellular communication network, when a mobile station that is not connected to a base station transmits safety information, the mobile station must first perform initial access to the base station using a RACH (Random Access Channel). However, RACH is not a channel scheduled for each mobile station. Therefore, in an area where mobile stations are crowded, for example, when an earthquake early warning is notified, it is expected that a plurality of mobile stations simultaneously perform initial access. Concentration of access by many mobile stations interferes with signals between mobile stations, and as a result, it becomes difficult to complete initial access of all mobile stations in a short time. As a matter of course, safety information cannot be acquired from the mobile station unless the initial access is completed. As a result, if the mobile station cannot send the safety information within the time from when the base station sends the earthquake early warning to the time when the base station is damaged by the earthquake, it is difficult to confirm the safety of the mobile station. .

  The present invention has been made in order to solve the above-described problem. In the event of a disaster, it is possible to avoid a situation where accesses from mobile stations are concentrated at one time and to collect safety information more reliably. An object is to provide an information collection system, a safety information collection method, a safety information collection program, a base station, and a mobile station.

  The safety information collection system of the present invention is capable of communicating with a base station via a wide-area wireless communication network and with other mobile stations via a short-range wireless communication network. And a safety information database sharing process is performed between the plurality of mobile stations via the short-range wireless communication network, and the base station includes a plurality of the mobile stations. Requesting the shared safety information database to the predetermined mobile station, and based on the request, the predetermined mobile station transmits the shared safety information database to the base station .

  The safety information collecting method of the present invention is capable of communicating with a base station via a wide-area wireless communication network and a plurality of mobile stations capable of communicating with other mobile stations via a short-range wireless communication network. A safety information collection method in a safety information collection system comprising: a safety information database sharing process via the short-range wireless communication network among a plurality of the mobile stations, A shared safety information database is requested from a base station to a predetermined mobile station of the plurality of mobile stations, and is shared from the predetermined mobile station to the base station based on the request. The converted safety information database is transmitted.

  The safety information collection program of the present invention is capable of communicating with a base station via a wide-area wireless communication network and with other mobile stations via a short-range wireless communication network. A function of executing a sharing process of a safety information database via the short-range wireless communication network among a plurality of the mobile stations in a computer of a safety information collecting system comprising: A function of requesting the shared safety information database to a predetermined mobile station of the plurality of mobile stations, and sharing from the predetermined mobile station to the base station based on the request A program for executing a function of transmitting the safety information database.

  The mobile station of the present invention is a plurality of mobile stations that can communicate with a base station via a wide area wireless communication network and can communicate with other mobile stations via a short-range wireless communication network, A safety information database sharing process is performed between the plurality of mobile stations via the short-range wireless communication network, and from the base station to a predetermined mobile station among the plurality of mobile stations, The shared safety information database is requested, and based on the request, the shared safety information database is transmitted from the predetermined mobile station to the base station.

  The base station of the present invention is a base station capable of communicating with a mobile station via a wide area wireless communication network, and sharing a safety information database via a short-range wireless communication network among the plurality of mobile stations. After the process is executed, the shared safety information database is requested to the predetermined mobile station among the plurality of mobile stations, and transmitted from the predetermined mobile station based on the request. The shared safety information database is received.

  ADVANTAGE OF THE INVENTION According to this invention, the situation where the safety information of the user holding a mobile station concentrates at a time at the time of disaster occurrence is avoided, and safety information can be collected more reliably.

It is a block diagram which shows the structural example of the safety information collection system which concerns on embodiment of this invention. FIG. 2 is a block diagram illustrating a configuration example of a mobile station illustrated in FIG. 1. It is a block diagram which shows the structural example of the base station shown in FIG. 3 is a flowchart for explaining an operation example of the mobile station shown in FIG. 2. It is a sequence diagram which shows the communication and each process which are performed between a base station and a some mobile station in a certain division area in time series.

(Description of configuration)
FIG. 1 is a block diagram illustrating a configuration example of a safety information collection system 10 according to an embodiment of the present invention. The safety information collection system 10 includes a plurality of mobile stations 12 and a base station 14. The plurality of mobile stations 12 and the base station 14 can communicate via the wide area wireless communication network 20. The mobile stations 12 can communicate with each other via the short-range wireless communication network 22.

  In the following description, a case where the wide area wireless communication network 20 is a cellular communication network and the short-range wireless communication network 22 is a WiFi (Wireless Fidelity / registered trademark) communication network will be described as an example.

  FIG. 2 is a block diagram showing a configuration example of the mobile station 12 shown in FIG. The mobile station 12 includes a WiFi communication transmission / reception unit 30, a cellular communication transmission / reception unit 32, a storage unit 34, and a control unit 36.

  The WiFi communication transmitting / receiving unit 30 communicates with other mobile stations 12 by WiFi. For example, the WiFi communication transmitting / receiving unit 30 transmits / receives a safety information database to / from other mobile stations 12. The safety information database includes safety information of at least one mobile station 12. The safety information includes at least identification information for identifying the mobile station 12, position information of the mobile station 12, and operation time information when the mobile station 12 was last operated.

  The cellular communication transmitting / receiving unit 32 communicates with the base station 14 by cellular communication. For example, the cellular communication transmitting / receiving unit 32 receives a safety information database request signal from the base station 14 and transmits a safety information database to the base station 14.

  The storage unit 34 stores at least a safety information database.

  When receiving the safety information database from the adjacent mobile station 12, the control unit 36 updates the safety information database stored in the storage unit 34.

  When the control unit 36 determines that the safety information database request signal has been received from the base station 14, the control unit 36 reads the safety information database from the storage unit 34, and transmits the read safety information database to the base station via the cellular communication transmitting / receiving unit 32. Transmit to station 14.

  FIG. 3 is a block diagram showing a configuration example of the base station 14 shown in FIG. The base station 14 includes a cellular communication transmission / reception unit 40, a storage unit 42, and a control unit 44.

  The cellular communication transmitting / receiving unit 40 communicates with the mobile station 12 by cellular communication.

  The storage unit 42 stores a mobile station list to be described later.

  The control unit 44 creates a mobile station list. The mobile station list is information on one or more mobile stations 12 located in the own cover area. In the mobile station list, identification information and position information are set for each mobile station 12.

  Further, the control unit 44 updates the mobile station list. Specifically, the control unit 44 determines that the mobile station 12 that has received the safety information in the mobile station list has been received.

  Further, the control unit 44 collects the safety information database received from the mobile station 12 via the cellular communication transmitting / receiving unit 40.

In addition, the control unit 44 selects the mobile station 12 that transmits the safety information database to the base station 14 from the mobile station list. The control unit 44 transmits a safety information database request signal to the selected mobile station 12 via the cellular communication transmitting / receiving unit 40.
(Description of operation)
First, the operation of the base station 14 will be described. Prior to the safety information collection described below, the control unit 44 of the base station 14 collects identification information and position information from each of all the mobile stations 12 located in its own cover area, and creates a mobile station list. The mobile station list is stored in the storage unit 42.

  The control unit 44 transmits the emergency earthquake bulletin to all the mobile stations 12 in the own cell when the transmission of the emergency earthquake bulletin is requested from the host system device. The control unit 44 generates WiFi setting information that is setting information of WiFi communication in the mobile station 12 and transmits it to all the mobile stations 12 in the own cell. The WiFi setting information includes AP identification information indicating identification information of the mobile station 12 set in an access point (hereinafter referred to as AP) mode (also referred to as a master mode), and the mobile station 12 set in the AP mode in the AP mode. AP holding time information indicating the holding time T for holding the state of, and maximum transmission power information indicating the maximum transmission power during WiFi communication. Note that the maximum transmission power during WiFi communication is set so as to sufficiently cover one divided area S which will be described below.

  The control unit 44 divides the own cover area into S (positive integer) divided areas. The control unit 44 allocates the mobile stations 12 for each divided area based on the mobile station list. The control unit 44 creates WiFi setting information for each divided area.

  Note that only identification information of a mobile station having a WiFi function may be selected as AP identification information on the basis of information such as the model and capability (UE Capability) of the mobile station. Priority is given to identification information of a mobile station with high performance based on at least one of speed, 3GPP standard that the mobile station supports, battery capacity, maximum communication possible time, etc., and WiFi setting information selected as AP identification information May be generated.

  In addition, the size of the divided areas may be the same for all areas, or may be different sizes for each area. Further, the number of mobile stations selected for each divided area may be the same or different. For example, in a place where mobile stations are crowded, the divided area may be narrowed, and the size of the divided area may be determined so as to be approximately equal to the number of mobile stations in the divided area where the mobile stations are scattered.

  The control unit 44 selects n (positive integer) mobile stations set to the AP mode as a first to n-th AP mobile station for a certain divided area. The first to nth AP mobile stations correspond to the order of the mobile stations set to the AP mode. For example, the first AP mobile station corresponds to the mobile station that first sets the AP mode after receiving the WiFi setting information, and the second to nAP mobile stations move to the client mode (also referred to as the slave mode). Corresponds to the station.

  Note that the divided area to which the mobile station belongs changes depending on the position of the mobile station, but if the position of the mobile station in the AP mode in the divided area changes, the cover area of the corresponding AP changes. For this reason, the divided area of the client mode mobile station may be different from the divided area of the AP mode mobile station with which the client mode mobile station communicates. Thus, the AP mode mobile station is determined for each divided area, but the communication partner of the AP mode mobile station is not limited to the divided area of the AP mode mobile station. Communication may be performed with all mobile stations as long as the area reaches.

  When T time elapses after the first AP mobile station is set to the AP mode, the first AP mobile station is switched from the AP mode to the client mode, and the second AP mobile station is switched from the client mode to the AP mode. Up to the nth AP mobile station, the AP mode is set in the first to n order notified from the base station 14. After this, the mobile station 12 itself may determine so that the mobile station 12 that is in the AP mode is set at random, or the first to nth may be repeated.

  Note that n does not necessarily have to be the same as the number of all mobile stations 12 existing in a certain divided area, and is a predetermined reference (for example, whether or not a mobile station exists in a position overlapping with an adjacent divided cell. ) Can be set arbitrarily.

  The control unit 44 selects any one mobile station 12 from the mobile station list when the safety information collection start time V has elapsed since the emergency earthquake bulletin was transmitted. The control unit 44 performs uplink lease assignment to the selected mobile station 12 and transmits a safety information database request signal including uplink resource assignment information to the selected mobile station 12. Thereby, uplink communication from the selected mobile station 12 to the base station 14 becomes possible.

  The control unit 44 receives the safety information database from the selected mobile station 12 via the cellular communication transmitting / receiving unit 40. The control unit 44 checks the mobile station 12 whose safety information is included in the received safety information database as the mobile station 12 that has “collected safety information” in the mobile station list.

  Next, the control unit 44 selects one mobile station 12 from the mobile stations 12 that are not checked as having collected safety information from the updated mobile station list, and selects the selected mobile station 12. Then, uplink resource allocation is performed. The control unit 44 transmits a safety information database request signal including uplink resource allocation information to the selected mobile station 12. In the present embodiment, the safety information database request signal is transmitted to one mobile station, but the safety information database request signal may be transmitted to a plurality of mobile stations at the same time.

  Next, the operation of the mobile station 12 will be described. FIG. 4 is a flowchart for explaining an operation example of the mobile station 12.

  The control unit 36 of the mobile station 12 determines whether or not an emergency earthquake warning has been received from the base station 14 (step S1). When the earthquake early warning is not received (No in step S1), the process of step S1 is executed again. When the earthquake early warning is received (Yes in Step S1), the control unit 36 receives WiFi setting information from the base station 14 (Step S2). When the WiFi function of the own station is OFF, the control unit 36 sets the WiFi function of the own station to ON (step S3).

  The control unit 36 determines the WiFi mode (step S4). Specifically, when the first to nth AP identification information included in the WiFi setting information matches the identification number of the own station, the control unit 36 sets the WiFi function of the own station to the AP mode at the corresponding time. If the identification information of the own station does not match, the WiFi function of the own station is set to the client mode. Note that the n (1 <n <N) -th mobile station 12 is in the AP mode in a period of (n−1) × T to n × T. Further, the maximum transmission power in WiFi communication is determined based on the maximum transmission power information included in the WiFi setting information.

  A safety information database transmission / reception process is executed (step S5). Specifically, the mobile station 12 in the client mode transmits a safety information database held by itself to the mobile station 12 in the AP mode. The mobile station 12 in the AP mode includes the safety information of all the mobile stations in all the received databases based on all the safety information databases received from the plurality of mobile stations 12 and the safety information database held by the own station. A new safety information database is created and transmitted to the mobile station 12 in the client mode. You may transmit separately and may transmit by broadcast.

  A safety information database update process is executed (step S6). Specifically, the client mode mobile station 12 that has received the safety information database from the AP mode mobile station 12 compares the received safety information database with the safety information database held by itself. When the information that does not exist in the received safety information database exists in the safety information database of the own station, the mobile station 12 in the client mode adds the difference information to the received safety information database, and serves as the safety information database of the own station. Update. Further, when the received safety information database and the safety information database of the own station include information on the same mobile station, only the latest information on the operation time information is held in the safety information database of the own station.

  The control unit 36 determines whether or not a safety information transmission stop signal has been received from the base station 14 (step S7). When the safety information transmission stop signal is not received (No in step S7), transmission / reception of the safety information database (step S5) and update of the safety information database (step S6) are repeatedly executed.

  When the safety information transmission stop signal is received (Yes in step S7), transmission / reception and update of the safety information database are stopped (step S8). Then, for a predetermined time W after receiving the safety information transmission stop signal, the mobile station 12 transmits a safety information transmission stop signal to surrounding mobile stations 12 by WiFi communication. The mobile station 12 switches between the AP mode and the client mode based on the WiFi setting information in the same manner as when the safety information database is transmitted and received, and the mobile station 12 that has entered the AP mode broadcasts a safety information transmission stop signal. It may be transmitted or another method may be used.

FIG. 5 shows a time series of communication and processing performed between a base station 14 and a plurality of mobile stations 12 (for example, a first mobile station, a second mobile station, and a third mobile station) in a certain divided area. It is a sequence diagram shown in FIG. The description of the communication and each process in FIG. 5 is omitted because it is the same as the above description (the operation description of the base station 14 and the description of the mobile station 12 using FIG. 4). FIG. 5 illustrates a case where the first mobile station is first in the AP mode, the third mobile station is in the AP mode, and the second mobile station remains in the client mode without being in the AP mode. Yes.
(Explanation of effect)
According to the embodiment described above, the safety information is shared between the plurality of mobile stations 12 via the WiFi communication network (the safety information database transmission / reception process shown in step S5 and the safety information database shown in step S6). Update processing) is executed. Then, the base station 14 requests a shared safety information database from a predetermined one of the plurality of mobile stations 12. Based on the request, one predetermined mobile station 12 transmits a shared safety information database to the base station 14.

  Since the sharing process is executed on the WiFi communication network, the communication load of the cellular communication network is not increased. Of course, in the end, the safety information database is transmitted from the mobile station 12 to the base station 14, but the mobile station 12 that transmits the safety information database may be part of the mobile stations 12 (for example, the base station 14). If the cover area is divided into three, three units are sufficient. Therefore, the traffic of the cellular communication network in that case is extremely low when compared with the traffic when the initial access from all the mobile stations is concentrated.

  That is, according to the embodiment described above, a situation in which accesses from users holding the mobile station 12 are concentrated at a time when a disaster occurs can be avoided. As a result, the safety information of the mobile station 12 can be collected more reliably between the time when the base station 14 transmits the earthquake early warning and the time when the base station 14 is damaged by the earthquake.

  In the above description, the case where the preliminary report from the host system apparatus is the earthquake preliminary report is illustrated, but the preliminary report is not limited to the earthquake but can be widely applied to all disasters. For example, the breaking news may be a typhoon breaking news or a tsunami breaking news.

  Moreover, although the case where the wide area radio | wireless communication network 20 is a cellular communication network is illustrated in the above description, the wide area radio communication network 20 is not limited to a cellular communication network. Further, the wide-area wireless communication network and the short-range wireless communication network may be different wireless communication networks or the same wireless communication network. In addition, the wireless communication methods in the wide area wireless communication network and the short-range wireless communication network may be different methods or the same.

  Moreover, although the case where the near field communication network 22 is a WiFi communication network is illustrated in the above description, the near field communication network 20 is not limited to the WiFi communication network.

  Also, a program for realizing all or part of the functions of the embodiments described above is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. You may process each part by.

  As an example of the “computer system”, for example, a CPU (Central Processing Unit) can be cited.

  The “computer-readable recording medium” is, for example, a non-transitory storage device. Examples of non-temporary storage devices include a magneto-optical disk, a ROM (Read Only Memory), a portable medium such as a nonvolatile semiconductor memory, and a hard disk built in a computer system. The “computer-readable recording medium” may be a temporary storage device. As an example of a temporary storage device, for example, a communication line in the case of transmitting a program via a network such as the Internet or a communication line such as a telephone line, or a volatile memory inside a computer system can be cited.

  Further, the program may be for realizing a part of the above-described functions, and may be capable of realizing the above-described functions in combination with a program already recorded in the computer system. .

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to description of the said embodiment. It is obvious to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. Therefore, it is needless to say that embodiments with such changes or improvements are also included in the technical scope of the present invention. The numerical values and names of the components used in the embodiments described above are illustrative and can be changed as appropriate.

DESCRIPTION OF SYMBOLS 10 Safety information collection system 12 Mobile station 14 Base station 20 Wide area wireless communication network 22 Short-range wireless communication network 30 WiFi communication transmission / reception part 32 Cellular communication transmission / reception part 34 Storage part 36 Control part 40 Cellular communication transmission / reception part 42 Storage part 44 Control part

Claims (10)

A base station,
A plurality of mobile stations capable of communicating with the base station via a wide-area wireless communication network and capable of communicating with other mobile stations via a short-range wireless communication network;
With
A safety information database sharing process is executed between the mobile stations via the short-range wireless communication network,
The base station requests the shared safety information database to a predetermined mobile station of the plurality of mobile stations,
On the basis of the request, the predetermined mobile station transmits the shared safety information database to the base station.   In the sharing process, the mobile station in the slave mode transmits a first safety information database including at least its own safety information to the mobile station in the master mode, and the mobile station in the master mode Based on the first safety information database, a second safety information database is created so that the received safety information of all the mobile stations is included, and the second safety information database is used as the mobile station in the slave mode. When the mobile station in the handset mode compares the second safety information database with the first safety information database, and there is a difference between the two, the difference is stored in the first safety information database. The safety information collecting system according to claim 1, wherein the third safety information database is created in addition to the process.   In the sharing process, from receiving from the base station setting information including at least identification information for identifying a mobile station that is initially in a base unit mode, until receiving a safety information database transmission / reception stop instruction, The safety information collecting system according to claim 2, which is continuously executed.   4. The safety information collecting system according to claim 3, wherein the setting information further includes holding time information in which the parent device mode is held and maximum transmission power information of the short-range wireless communication network.   In the sharing process, the mobile station that is in the master mode is a mobile station that is located at a position where two or more predetermined divided areas overlap when the coverage area of the base station is divided into a plurality of divided areas. The safety information collecting system according to claim 2, wherein the safety information collecting system is a station.   The safety information collecting system according to claim 1, wherein the wide area wireless communication network is a cellular network, and the short-range wireless communication network is a wireless LAN. Safety information comprising a base station and a plurality of mobile stations that can communicate with the base station via a wide-area wireless communication network and can communicate with other mobile stations via a short-range wireless communication network A safety information collection method in a collection system,
A safety information database sharing process is executed between the mobile stations via the short-range wireless communication network,
A shared safety information database is requested from the base station to a predetermined mobile station of the plurality of mobile stations,
The shared safety information database is transmitted from the predetermined mobile station to the base station based on the request. Safety information comprising a base station and a plurality of mobile stations that can communicate with the base station via a wide-area wireless communication network and can communicate with other mobile stations via a short-range wireless communication network On the computer of the collection system,
A function of executing a sharing process of the safety information database via the short-range wireless communication network between the plurality of mobile stations;
A function of requesting the shared safety information database from the base station to a predetermined mobile station of the plurality of mobile stations;
A safety information collection program for executing a function of transmitting the shared safety information database from a predetermined mobile station to the base station based on the request. A plurality of mobile stations that can communicate with a base station via a wide-area wireless communication network and can communicate with other mobile stations via a short-range wireless communication network,
A safety information database sharing process is executed between the mobile stations via the short-range wireless communication network,
A shared safety information database is requested from the base station to a predetermined mobile station of the plurality of mobile stations,
The shared safety information database is transmitted from the predetermined mobile station to the base station based on the request. A base station capable of communicating with a mobile station via a wide area wireless communication network,
After the safety information database sharing process is performed between the plurality of mobile stations via the short-range wireless communication network, the process is shared with the predetermined mobile station among the plurality of mobile stations. A base station which requests the safety information database and receives the shared safety information database transmitted from a predetermined mobile station based on the request.

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