JP2016158187A - Communication system and communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system and a communication method capable of saving safety information in an information processing unit and referring the safety information, while suppressing occurrence of congestion of the network.SOLUTION: A communication system 1 includes a first information processing units 14-17, 19 (home subscriber server HSS) for generating the safety information of a wireless terminal including the position information of the wireless terminal about a disaster, in response to a position registration signal from the wireless terminal after receiving the disaster information, and transmitting the safety information to a multicast group by multicast, and second information processing units 11-13, 21 (home subscriber server HSS) for transmitting a participation signal to multicast distribution based on the address of the first information processing units, in response to reception of the disaster information.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a communication system and a communication method.

  Data transmission forms in the protocol TCP / IP include unicast, broadcast, and multicast. Here, TCP / IP represents a combination of TCP (Transmission Control Protocol) and IP (Internet Protocol). Unicast is a form in which data is transmitted on a one-to-one basis in a network. Broadcast is a form of transmitting data in a one-to-many manner in a network. Multicast is a form in which data is transmitted from one terminal to a specific group of terminals in the network.

  Multicast enables simultaneous broadcast communication to terminals of a group by grouping a plurality of hosts and assigning IP addresses. In this case, the host receives the multicast data if the destination MAC (Media Access Control) address is the MAC address of the group in which it joins. The host sends a join message to the router to join the multicast group. The router reflects the received participation message in the information in the group management table, and causes the host to participate in the group. Thereafter, the router periodically checks whether or not the host is still participating in the group by using an Internet Group Management Protocol (IGMP) query. Further, when the router receives a leave or leave message indicating leaving from the group from the host, the router deletes the information of the host from the table. The protocol is specified in RCF (Request For Comments memoranda) -3376 Internet Group Management Protocol, version 3, and RFC-3810 Multicast Listener Discovery for IPv6, version 2.

  A server device having a known safety confirmation function registers user information of a user and contact information of the safety in a user information database and a contact information database, respectively. When urgent information occurs, the server device identifies a safety confirmation target area and transmits a safety confirmation mail to a user's mobile terminal existing in this area. The server device further monitors the reception of the reply mail from the user, creates safety confirmation information based on the reception status, stores the safety confirmation information in the safety confirmation information database, and stores it in the contact information database. Deliver to registered contacts. As a result, the safety of the victim is efficiently confirmed when a disaster occurs, thereby effectively suppressing an increase in traffic on the communication network.

  In the known safety confirmation system, when the occurrence of a disaster is detected, the center station predicts the size of communication congestion expected from the disaster situation, and performs access restriction based on a predetermined access restriction operation specification. The level is determined, and the access restriction information is broadcast to the affected area where communication may be congested via a satellite or the like. The disaster area information terminal in the disaster area generates and transmits safety information of a data amount corresponding to the received access restriction level. This safety information is stored in the safety confirmation server, the disaster prevention countermeasures headquarters database, etc., and information terminals outside the disaster area can obtain the safety information from this safety confirmation server via the network, and confirm the safety in the disaster area. It becomes possible. Accordingly, it is possible to prevent occurrence of communication congestion and collect safety confirmation information in the affected area.

JP 2003-186980 A JP 2004-297131 A

  In known systems, for example, when a disaster occurs in a wide area such as an earthquake, the center that stores the safety information of the safety confirmation target person in the affected area receives a large number of accesses centrally from the terminal of the safety information requester. As a result, the center and the nearby network are congested. In addition, when the center is in a disaster area, access to safety information becomes impossible.

  The inventor has recognized that it is necessary for the safety confirmation person's terminal to be able to access the safety information of the safety confirmation target person on the information processing device while suppressing the occurrence of network congestion in the event of a disaster. .

  In one aspect, an object of the present invention is to enable efficient transmission / reception of safety information while suppressing occurrence of network congestion.

  According to an aspect of the present invention, in response to a location registration signal from a wireless terminal after receiving disaster information, the safety information of the wireless terminal including the location information of the wireless terminal related to the disaster is generated, and the safety information is transmitted to the multicast group. A first information processing device that transmits to the destination by multicast; a second information processing device that transmits a participation signal for multicast distribution based on the address of the first information processing device in response to receiving disaster information; A communication system is provided.

  According to one aspect of the present invention, it is possible to efficiently transmit and receive safety information while suppressing the occurrence of network congestion.

FIG. 1 shows an example of a schematic configuration of a communication system including a router, a server for disaster warning, a home subscriber server (HSS), an organization server, and a radio base station on the network according to the embodiment. ing. FIG. 2 shows registration of safety information in the first HSS, transmission of a participation message to the safety notification by the second HSS, and delivery of the safety information notification message by the first HSS to the second HSS by multicast. It is a figure for demonstrating the example of the communication procedure containing. FIG. 3 shows an example of a schematic configuration of the home subscriber server. FIG. 4 shows an example of a schematic configuration of an organization server. FIG. 5 shows an example of a schematic configuration of a wireless terminal. FIG. 6 shows an example of a schematic configuration of the processor of the home subscriber server. FIG. 7 shows an example of a schematic configuration of a processor of an organization server. FIG. 8 shows an example of a schematic configuration of the processor of the wireless terminal. 9A and 9B show an example of a transmission / reception sequence between a wireless terminal, a home subscriber server (HSS), and a router. (Explained in Figure 9A) 10A to 10D show an example of a transmission / reception sequence between the wireless terminal, the home subscriber server (HSS), and the router after FIG. 9B. (Explained in Fig. 10A) (Explained in Fig. 10A) (Explained in Fig. 10A) FIG. 11 illustrates an example of wireless terminal data generated and stored in the wireless terminal. FIG. 12 shows an example of subscriber data of a wireless terminal in HSS. FIG. 13 shows an example of the other person safety information table in the HSS. FIG. 14A shows an example of a safety notification leaving condition table in the HSS or organization server. FIG. 14B shows another example of the safety notification leaving condition table in the HSS or organization server. FIG. 15 shows an example of a seismic intensity information table in the disaster warning server. FIG. 16 shows an example of the AP neighborhood seismometer list in the HSS. FIG. 17 shows an example of an evacuation status registration message transmitted from each wireless terminal to a corresponding HSS. FIG. 18A shows an example of an inquiry message transmitted from each HSS to the disaster warning server. FIG. 18B shows an example of a response message transmitted from the disaster warning server to each wireless terminal in response to the inquiry message. FIG. 19A shows an example of another person safety reference message transmitted from each wireless terminal to each corresponding HSS. FIG. 19B illustrates an example of a response message transmitted from each HSS to each wireless terminal in response to the other person safety reference message. FIG. 20 shows an example of a safety notification message transmitted by multicast from the HSS in which the safety confirmation subject wireless terminal is registered to the HSS or organization server in which the safety confirmation subject wireless terminal is registered. FIG. 21 shows an example of a safety notification participation message (MLD-join) transmitted by the HSS in which the wireless terminal of the safety confirmer is registered and the server of the organization to the HSS in which the wireless terminal of the safety confirmation target is registered. Is shown. FIG. 22 shows an example of a safety notification withdrawal message (MLD-leave) transmitted to the HSS in which the safety confirmation subject wireless terminal is registered by the HSS in which the safety confirmer wireless terminal is registered and the organization server. Is shown. FIG. 23 shows an example of a flowchart of processing for transmitting a safety notification participation message, which is executed by the HSS when a disaster warning is received. FIG. 24 shows an example of a flowchart of processing for transmitting a safety notification participation message, which is executed by the server of the organization of the safety confirmer. FIG. 25 shows an example of a flowchart of processing for setting presence / absence of safety notification participation performed by the HSS when a safety notification participation message is received. FIG. 26 shows an example of a flowchart of a process for generating and transmitting a location registration message executed by the wireless terminal of the safety confirmation subject. 27A and 27B show an example of a flowchart of processing for setting location information of a wireless terminal related to a disaster, which is executed by the HSS in which the wireless terminal of the safety confirmation target person is registered. (Described in Figure 27A) FIG. 28 shows an example of a flowchart of processing for generating and transmitting an evacuation status registration message executed by the wireless terminal of the safety confirmation subject. FIG. 29 shows an example of a flowchart of processing for transmitting a safety notification message executed by the HSS. FIG. 30 shows an example of a flowchart of a process for determining whether to leave the safety notification group when receiving a safety notification message, which is executed by the HSS or the organization server when the safety notification message is received. FIG. 31 shows an example of a flowchart of processing at the time of receiving a safety notification leaving message, which is executed by the HSS. FIG. 32 shows an example of a flowchart of processing for referring to the safety of others executed by the wireless terminal and the terminal device. 33A and 33B show an example of data of the wireless terminal of the safety confirmation target person, the HSS, and the organization server at time T1 in the transmission / reception sequence of FIG. 9A. (Described in Figure 33A) 34A and 34B show examples of data of the wireless terminal of the safety confirmation target person, the HSS, and the organization server at time T2 in the transmission / reception sequence of FIG. 9A. (Explained in Figure 34A) 35A and 35B show an example of data of the wireless terminal and HSS of the safety confirmation target person and the server of the organization at time T3 in the transmission / reception sequence of FIG. 9B. (Explained in Figure 35A) 36A and 36B show examples of data of the wireless terminal of the safety confirmation target person, the HSS, and the organization server at times T4 to T5 in the transmission / reception sequence of FIG. 10A. (Explained in Figure 36A) FIGS. 37A and 37B show examples of data of the safety confirmation subject wireless terminal, HSS, and organization server at times T6 to T7 in the transmission and reception sequences of FIGS. 10B and 10C. (Explained in Figure 37A) FIGS. 38A and 38B show examples of data of the wireless terminal of the safety confirmation target person, the HSS, and the organization server at times T8 to T9 in the transmission / reception sequence of FIG. 10D. (Explained in Figure 38A)

The objects and advantages of the invention will be realized and attained by means of the elements and combinations particularly pointed out in the appended claims.
It is understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to limit the invention.

  Non-limiting embodiments of the present invention will be described with reference to the drawings. In the drawings, similar components and elements have the same reference numerals.

  In a known safety confirmation system, each organization server requests safety information transmission to the terminal device of each member of the organization, and each member uses the terminal device in response to the request or voluntarily. By registering information with the server, safety information is collected at the server. On the other hand, a person who registers safety information in the affected area belongs to a plurality of organizations such as a company, a public organization, a family, and a residents' association, and is required to notify the safety information to each organization. Therefore, when the number of organizations to which an individual belongs is large, for the person who registers the safety information, the work of the terminal device for registration of the safety information and the communication amount are increased, and the network traffic increases when a disaster occurs, Is likely to be congested.

  The inventor, the server that manages the subscriber information of the wireless terminal of the safety confirmation target receives location information from the wireless terminal of the safety verification target, generates and stores the safety information, and efficiently transmits the safety information by multicast. Recognized that it can be transmitted automatically. In addition, the inventor, another server that manages subscriber information of the wireless terminal of the safety checker participates in the multicast distribution, receives and selectively stores the safety information of a specific safety check target, Recognized that the wireless terminal of the confirmer can access the safety information.

  The purpose of the embodiment is to generate safety information on a server corresponding to the wireless terminal of the safety confirmation target while collecting congestion information on the server corresponding to the wireless terminal of the safety confirmation person while suppressing the occurrence of congestion in the network. The safety confirmation person can access the collected safety information. This object can be achieved by the embodiment.

  Next, a schematic configuration of the communication system according to the embodiment will be described.

  FIG. 1 shows a communication system 1 including routers 26 and 28, a disaster alarm server 2, home subscriber servers 11 to 19, an organization X server 21, and radio base stations 31 to 40 on a network 5 according to an embodiment. An example of a schematic configuration is shown. Here, the communication system 1 further includes safety confirmation person wireless terminals 51 to 53 and a terminal device 60, and safety confirmation object person wireless terminals 54 to 59.

  In FIG. 1, a network 5 includes, for example, an IP (Internet Protocol) network and a mobile communication network. The network 5 may further include, for example, an ISDN (Integrated Services Digital Network), an optical line, a DSL (Digital Subscriber Line), a packet network, a public telephone network, and / or a CATV (Cable Television) network. The wireless base stations 31 to 40 are wireless base station devices, for example, base station (access point) devices for third-generation or fourth-generation mobile communication, or wireless base stations for wireless LANs. There may be.

  Each of the routers 26 and 28 is a collective representation of one or more routers. The home subscriber servers 11 to 19 are arranged at arbitrary positions on the network 5. The home subscriber servers 11 to 13 are assumed to be connected to the router 26 on the network 5. The home subscriber servers 14 to 19 are connected to the router 28 on the network 5. The radio base stations 31 to 37 and 39 are connected to home subscriber servers 11 to 19 arbitrarily via routers (not shown). The radio base stations 38 and 40 are connected to home subscriber servers 17 and 19 through routers (not shown), respectively. The home subscriber server may be, for example, a server of a node that executes a home agent defined by Mobile IPv6 of the standard RCF6275, and is also referred to as HSS below. The radio base station is also referred to as AP below.

  The wireless terminals 51 to 59 are mobile terminals, and may be mobile information processing terminals such as mobile phones, smartphones, tablets, or notebook personal computers. The terminal device 60 may be an information processing terminal such as a tablet-type or notebook personal computer.

  The wireless terminals 51 to 59 are within the communicable range of the wireless base stations 31 to 37 and 39 and communicate with the wireless base stations 31 to 37 and 39, respectively. After the disaster occurs, the wireless terminals 57 and 59 move within the communicable range of the wireless base stations 38 and 40, respectively, and communicate with the wireless base stations 38 and 40. The terminal device 60 of the organization X is connected to the server 21 through a router (not shown) arbitrarily.

  The home subscriber servers (HSS) 11 to 19 manage subscriber data of the respective wireless terminals 51 to 59 in charge. For example, each of the wireless terminals 51 to 59 in charge is one of the wireless base stations 31 to 40 or the like. Manage what is located in.

  It is assumed that safety checkers A1 to A3 are subscribers of mobile communication services related to wireless terminals 51 to 53 registered in home subscriber servers 11 to 13, respectively. Further, it is assumed that the safety confirmation subjects B1 to B3, C1 and C2 are subscribers of mobile communication services related to the wireless terminals 54 to 59 registered in the home subscriber servers 14 to 19, respectively. The organization X may be, for example, a company, a public organization, an alumni association, a club, a family, or a community association. The safety confirmation target person B1 is further assumed to be a member of the organization X. The terminal device 60 of the organization X is connected to the server 21 on the network 5.

  The wireless terminals 51 to 59 have the same functions and operate in the same manner. However, in the following, for the sake of explanation, the subscriber who owns the wireless terminals 51 to 53 is a safety confirmer, but it can also be a safety confirmation target, and the subscriber who owns the wireless terminals 54 to 59 is Although it is a confirmation target person, it can also be a safety confirmation person.

  The home subscriber servers 11 to 19 have the same function and operate in the same manner. For explanation, the home subscriber servers 11 to 13 and the server 21 receive, collect and store the safety information of the subscribers of the wireless terminals 54 to 59 distributed from the home subscriber servers 14 to 19, and store the wireless terminals 51 to 51. It is assumed that safety information is provided to 53 and the terminal device 60. However, the home subscriber servers 11 to 13 receive location registration requests from the wireless terminals 51 to 53, generate and store the safety information of the subscribers of the wireless terminals 51 to 53, and store the home subscriber servers 14 to 19 and the server. 21 can also be distributed. Further, for explanation, the home subscriber servers 14 to 19 receive location registration requests from the wireless terminals 54 to 59, generate and store the safety information of the subscribers of the wireless terminals 54 to 59, and store the home subscriber servers 11 to 11 13 and the server 21. However, the home subscriber servers 14 to 19 receive, collect and store the safety information of the subscribers of the wireless terminals 51 to 53 distributed from the home subscriber servers 11 to 13, and store the wireless terminals 54 to 59 and the terminal devices. It is also possible to provide safety information to 60.

  The wireless terminals 54 and 55 of the safety confirmation subject are located outside the disaster area 7 when a disaster occurs. Further, the wireless terminals 56 to 59 of the safety confirmation subject are located in the disaster area 7 when a disaster occurs. In addition, it is assumed that the wireless terminal 57 of the safety confirmation target person moves within the affected area 7 (broken line) after the disaster occurs. The wireless terminal 59 of the safety confirmation target person is assumed to move outside the disaster area 7 after the disaster occurs (broken line).

  In FIG. 1, wireless terminals 51 to 53 are identified by a <b> 1 to a <b> 3, respectively, to indicate that they are wireless terminals of safety confirmation persons. The terminal device 60 is identified by a4 to indicate that it is a safety confirmation person's terminal device. The wireless terminals 54, 56, and 59 are identified by b1, b2, and b3, respectively, to indicate that they are the safety confirmation target wireless terminals. The wireless terminals 55 and 57 are wireless terminals of safety confirmation subjects, and are identified by c1 and c2, respectively, to indicate that the power is turned on after the disaster occurs.

  Further, the wireless base stations 31 to 33 are identified by APa1 to APa3 to indicate that they are in the vicinity of the wireless terminals 51 to 53 of the safety confirmer and relay communication with the wireless terminals 54 to 59, respectively. In addition, in order to indicate that the radio base stations 34, 35, and 40 are in the vicinity of or become close to the radio terminals 54, 55, and 59 of the safety confirmation subject, and relay communication with the radio terminals 54, 53, and 59, They are identified by APb1, APc1 and APb3, respectively. Further, the radio base stations 36 to 39 are in the vicinity of the radio terminals 54 to 59 of the safety confirmation target person, relay communication with the radio terminals 54 to 59, and each communication range is in the disaster area 7 Are identified by APα to APδ, respectively.

  The router 28 is identified by r1 to indicate that it is a router on the safety confirmation subject side. The router 26 is identified by r2 to indicate that it is a safety confirmation side router. The home subscriber servers (HSS) 11 to 13 are identified by A1 to A3 to indicate that they are server devices that manage subscriber information of the wireless terminals a1 to a3 of the safety confirmer. In addition, the home subscriber servers (HSS) 14 to 19 are servers B1 and C1, respectively, to indicate that they are server devices that manage subscriber information of the wireless terminals b1, c1, b2, c2, and b3 of the safety confirmer. , B2, C2, and B3. Server 21 is identified by X to indicate that it collects safety information for organization X.

  Next, as an example, a communication procedure including registration of safety information in the HSS 16, transmission of a participation message to the safety notification by the HSS 11, and multicast delivery of the safety information notification message to the HSS 11 by the HSS 16 according to the embodiment will be described. .

  FIG. 2 is a diagram for explaining an example of a communication procedure including registration of safety information in the HSS 16, transmission of a participation message to the safety notification by the HSS 11, and multicast delivery of the safety information notification message to the HSS 11 by the HSS 16. is there.

  In FIG. 2, when a disaster such as an earthquake occurs, the wireless terminal 56 (b2) of the safety confirmation target person generates a location registration message in response to receiving the disaster warning, transmits it to the HSS 16, and wirelessly transmits to the HSS 16. The position information of the terminal 56 is registered. Here, the subscriber information of the wireless terminal 56 is registered in the HSS 16, and the HSS 16 manages the subscriber data of the wireless terminal 56 regardless of the position and movement of the wireless terminal 56 on the network 5. Here, the subscriber data includes, for example, a terminal identifier, a terminal address, location information, safety information (b2), and the like.

  On the other hand, when a disaster occurs, the HSS 11 sends, via the routers 26 and 28, a multicast participation message to the network 5 that is a safety notification sourced from the HSS 16 in which the safety information of a specific safety confirmation target person is registered. To do. On the other hand, the HSS 16 receives the location registration message from the wireless terminal 56, generates and stores safety information (b2) of the safety confirmation target person who owns the wireless terminal 56. Also, the HSS 16 distributes or transmits a safety notification message including the safety information (b2) to the multicast group by multicast. The HSS 11 receives the safety notification message transmitted by multicast and stores it as other-person safety information. After that, the wireless terminal 51 of the safety confirmation person connects to the HSS 11 in charge of the wireless terminal 51 according to the operation, and receives and displays other person safety information from the HSS 11.

  The participation message for the safety notification transmitted by the HSS 11 may be further transmitted to the HSSs 15 and 17 in which the safety information of other specific safety confirmation subjects is registered. On the other hand, the HSSs 15 and 17, like the HSS 16, distribute or transmit a safety notification message including the safety information of each subscriber to the multicast group by multicast. Similarly, the HSS 11 receives and collects the safety notification messages transmitted by multicast from the HSSs 15 and 17 and stores them as other person safety information. Thereafter, the wireless terminal 51 of the safety confirmer similarly receives and displays the other person safety information from the HSS 11.

  Similarly to the HSS 11, the HSS 12 transmits a participation message to the safety notification using the HSS 16 in which the safety information is registered to the network 5 via the routers 26 and 28 by multicast. The HSS 12 receives the safety notification message transmitted by multicast from the HSS 16 and stores it as other-person safety information.

  Similarly, the HSS 11 may receive the location registration message from the wireless terminal 51 and generate and store safety information (a1) of the safety confirmation target person possessing the wireless terminal 51. On the other hand, the HSS 16 may send a participation message to the safety notification using the HSS 11 as a transmission source to the network 5 by multicast. Further, the HSS 11 may distribute or transmit a safety notification message including the safety information (a1) to the multicast group by multicast. The HSS 16 may receive the safety notification message transmitted by multicast and store it as other person safety information.

  By such multicast distribution of safety information by multicast on the network 5, participation in safety notification, and collection of safety information, safety information is efficiently transmitted and received in the network 5, and congestion in the network 5 is prevented. Occurrence is suppressed.

  Next, schematic configurations of the home subscriber servers 11 to 19, the server 21 of the organization X, and the wireless terminals 51 to 59 will be described.

  FIG. 3 shows an example of a schematic configuration of each of the home subscriber servers 11 to 19.

  In FIG. 3, each of the home subscriber servers 11-19 includes a processor 102, a memory 104, a storage device 106, and a network interface (NW / IF) 108 connected to an internal bus. The home subscriber servers 11 to 19 may be, for example, computers, server devices, information processing devices, or information management devices.

  The processor 102 may be a CPU (Central Processing Unit) for a computer. The memory 104 may include, for example, a main storage device and a semiconductor memory. The storage device 106 may include SD (Secure Digital) memory and / or a hard disk drive (HDD).

  Each of the home subscriber servers 11 to 19 may be connectable to the external drive 108. The drive 108 may be for reading a recording medium 184 such as an optical disk or a magnetic disk in which software or a program is recorded. The software may include, for example, an OS, a database management system (DBMS), an application program, and the like. The application program may include a safety information management application.

  The processor 102 may be a dedicated processor implemented as an integrated circuit, for example. The processor 102 may operate according to an OS and application programs stored in the memory 104 and / or the storage device 106. The application program may be stored in the recording medium 184, read from the recording medium 184 by the drive 108, and installed in the home subscriber servers 11-19. As an alternative, the application program may be downloaded from another server on the network 5 and installed in the home subscriber servers 11-19.

FIG. 4 shows an example of a schematic configuration of the server 21 of the organization X.
The server 21 is a server device, and includes a processor 102, a memory 104, a storage device 106, and a network interface (NW / IF) 108 connected to an internal bus, like the home subscriber servers 11 to 19. Yes. The server 21 may be, for example, a computer, an information processing device, or an information collection device. The server 21 may be connectable to the external drive 108 similarly to the home subscriber servers 11 to 19.

  FIG. 5 shows an example of a schematic configuration of each of the wireless terminals 51 to 59.

  In FIG. 5, each of the wireless terminals 51 to 59 includes a processor 502, a storage unit 504, a display unit 512, an acoustic unit 514, an input unit 516, a control unit 518, and a wireless communication unit 520 connected to an internal bus. It is out.

  The processor 502 may be a CPU (Central Processing Unit) for a computer. The storage unit 504 includes, for example, a main storage device and another semiconductor memory such as a semiconductor memory, a flash memory such as an SD (Secure Digital) memory or a USB memory, and further includes a hard disk drive (HDD). May be.

  Each of the wireless terminals 51 to 59 may be connectable to the external drive 530. The drive 530 may be for reading a recording medium 536 such as an optical disk or a magnetic disk in which software or a program is recorded. The software may include, for example, an OS, a database management system (DBMS), an application program, and the like. The application program may include an application for safety information registration processing and safety information reference.

  The processor 502 may be a dedicated processor implemented as an integrated circuit, for example. Further, the processor 502 may operate according to the OS and application programs stored in the storage unit 504. The application program may be stored in the recording medium 536, read from the recording medium 536 by the drive 530, and installed in the wireless terminals 51 to 59. As an alternative, the application program may be downloaded from a server on the network 5 and installed in the wireless terminals 51 to 59.

  The display unit 512 may be, for example, a liquid crystal display device or a liquid crystal display device with a touch panel. The acoustic unit 514 may include, for example, a microphone, a speaker, and a receiver. The input unit 516 may include, for example, a plurality of keys, a touch pad, a numeric keypad, a keyboard, a touch panel, and / or a pointing device.

  The control unit 518 may control the wireless communication unit 520. The wireless communication unit 520 can be connected to the network 5 via mobile communication wireless base stations 31 to 40.

  FIG. 6 shows an example of a schematic configuration of the processor 102 of the home subscriber servers 11 to 19.

  In FIG. 6, the processor 102 of the home subscriber servers 11 to 19 includes a control unit 1020, an application unit 1022, a safety information management unit 1024, and other processing units 1028. The control unit 1020 may supply control signals to the application unit 1022, the safety information management unit 1024, and the processing unit 1028 to control operations of these elements.

  The safety information management unit 1024 receives and manages the registered subscriber location information, manages safety information such as evacuation status and other person safety information reference, and receives other subscribers' safety information. And manage.

  FIG. 7 shows an example of a schematic configuration of the processor 102 of the server 21 of the organization X.

  In FIG. 7, the processor 102 of the server 21 includes a control unit 1020, an application unit 1022, a safety information management unit 1024, and other processing units 1028, similarly to the home subscriber servers 11 to 19.

  FIG. 8 shows an example of a schematic configuration of the processor 502 of the wireless terminals 51 to 59.

  In FIG. 8, the processor 502 of the wireless terminals 51 to 59 includes a control unit 5020, an application unit 5022, a safety information registration processing unit 5024, a safety information reference unit 5026, and other processing units 5028. The control unit 5020 may supply control signals to the application unit 5022, the safety information registration processing unit 5024, the safety information reference unit 5026, and the processing unit 5028 to control operations of these elements.

  The safety information registration processing unit 5024 transmits or registers information such as the location registration request of the wireless terminals 51 to 59 and the evacuation status input by the safety confirmation target person to the home subscriber servers 11 to 19. In addition, the safety information reference unit 5026 receives the safety information or the other person's safety information of the safety confirmation target registered in the home subscriber servers 11 to 19 and displays it on the display unit 512.

  Next, between the wireless terminals b1 to b3, c1 and c2, home subscriber servers (HSS) A1 to A3, B1 to B3, C1 and C2, and routers r1 and r2 when a disaster such as an earthquake occurs An example of the transmission / reception sequence will be described.

  9A and 9B show examples of transmission / reception sequences between wireless terminals b1 to b3, c1 and c2, home subscriber servers (HSS) A1 to A3, B1 to B3, C1 and C2, and routers r1 and r2. ing.

  FIGS. 10A to 10D are views of wireless terminals b1 to b3, c1 and c2, home subscriber servers (HSS) A1 to A3, B1 to B3, C1 and C2, and routers r1 and r2 after FIG. 9B. An example of a transmission / reception sequence is shown.

  1 and 9A, it is assumed that the subscriber of the wireless terminal b1 as a member of the organization X is registered in advance as a safety confirmation target person in the server X. HSS A3 has a subscriber of wireless terminal b3, HSS A2 has subscribers of wireless terminals b1, b2, and c2, HSS A1 has subscribers of wireless terminals b2, c1, and c2, and others It is assumed that the safety confirmation target person in the safety information table is registered in advance. In the first time T0 before the occurrence of the disaster warning, it is assumed that the wireless terminals b1 to b3 are powered on, but the wireless terminals c1 and c2 are powered off.

  Referring to FIG. 9A, for example, an information processing apparatus of a disaster information management organization such as the Japan Meteorological Agency or a local public organization uses a disaster warning or disaster information such as an earthquake warning or earthquake early warning as a server for a mobile carrier's disaster warning. 2 to send. In step 602, the server 2 broadcasts the received disaster alert or disaster information to the network 5. HSSA1-A3, B1-B3, C1, C2, Server X, wireless base stations 31-40 (APa1-APa3, APb1-APb3, APc1, APα-APδ), and wireless terminals b1-b3, c1, c2, a1- a3 receives disaster information by broadcast.

  In step 604, in response to receiving the disaster alert, the server X of the organization X participates in the safety notification via the router r2 in order to receive the safety information of the members of the organization X registered in the server X ( join) message is sent to the network 5 by multicast. In this case, the safety notification participation message includes the HSS address of the HSS B1 in which the subscriber information of the members of the organization X is registered as the source address (for example, IP address) of the safety notification message. The safety notification participation message is transferred via the routers r2 and r1 and reaches the HSS B1.

  In step 606, in response to receiving the disaster warning, the HSS A3 sends a safety notification via the router r2 to receive the safety information of the safety confirmation target person who has the wireless terminal b3 registered in the HSS A3. The participation message is transmitted to the network 5 by multicast. In this case, the safety notification participation message includes the HSS address of the HSS B3 in which the subscriber information of the safety confirmation target person is registered as the source address of the safety notification message. The safety notification participation message is transferred via the routers r2 and r1 and reaches the HSS B3.

  In step 608, in response to receiving the disaster warning, the HSS A2 receives the safety information of the safety confirmation target person possessing the wireless terminals b1, b2, and c2 registered in the HSS A2 via the router r2. A safety notification participation message is transmitted to the network 5 by multicast. In this case, the safety notification participation message includes the addresses of HSS B1, B2, and C2 in which the subscriber information of the safety confirmation subject is registered as the source address of the safety notification message. The safety notification participation message is transferred via the routers r2 and r1 and reaches the HSS B1, B2, and C2.

  In step 610, in response to receiving the disaster warning, the HSS A1 receives the safety information of the safety confirmation target person who owns the wireless terminals c1 and c2 registered in the HSS A1, via the router r2, A safety notification participation message is transmitted to the network 5 by multicast. In this case, the safety notification participation message includes the HSS addresses of the HSS C1 and C2 in which the subscriber information of the safety confirmation subject is registered as the source address of the safety notification message. The safety notification participation message is transferred via the routers r2 and r1 and reaches the HSS C1 and C2.

  On the other hand, if the wireless terminal b1 of the safety confirmation subject receives the disaster warning and there is no operation or an operation input is received after a certain time (for example, 3 minutes), the process of step 622 is performed. Run. That is, in step 622, the wireless terminal b1 transmits a location registration message for registering the location of the terminal itself to the HSS B1 in which the wireless terminal b1 is registered via the neighboring relay APb1 by unicast. The location registration message may include geographical location information (for example, latitude and longitude) of the wireless terminal (b1) or the relay AP (b1). The HSS B1 receives the location registration message, and generates and stores location information as part of the safety information of the wireless terminal b1.

  In step 624, in response to receiving the disaster warning and location registration message, the HSS B1 transmits an inquiry message including identification information of seismometers in the vicinity of the relay APb1 to the server 2 by unicast. The inquiry message may be a disaster magnitude inquiry or a seismic intensity inquiry. Instead of the identification information of the seismometer near the relay APb1, the geographical position information of the seismometer near the relay APb1 or the geographical position information of the relay APb1 may be used.

  In step 625, in response to receiving the inquiry message, the server 2 unicasts a response including the disaster magnitude or seismic intensity information corresponding to the identification information of the seismic intensity meter near the relay APb1 to the HSS B1. . The HSS B1 stores the received information on the magnitude of the disaster or the seismic intensity as a part of the safety information in association with the wireless terminal b1.

  In step 626, similarly, the wireless terminal b2 transmits a location registration message to the HSS B2 in which the wireless terminal b2 is registered by unicasting via the neighboring relay APα. The HSS B2 receives the location registration message, generates location information as part of the safety information of the wireless terminal b2, and stores it.

  In step 628, HSS B2 similarly transmits an inquiry message including identification information of seismometers in the vicinity of relay APb2 to server 2 in unicast in response to receiving the disaster alert and location registration message.

  In step 629, similarly, in response to receiving the inquiry message, the server 2 unicasts a response including the corresponding disaster magnitude or seismic intensity information to the HSS B2. The HSS B2 stores the received information on the magnitude of the disaster or seismic intensity as a part of the safety information in association with the wireless terminal b2.

  In Step 630, similarly, the wireless terminal b3 transmits the location registration message to the HSS B3 in which the wireless terminal b3 is registered by unicasting via the neighboring relay APδ. The HSS B3 receives the location registration message, generates location information as safety information of the wireless terminal b3, and stores it.

  In step 632, HSS B3 similarly transmits a query message including identification information of seismometers in the vicinity of relay APb3 to server 2 in unicast in response to receiving the disaster alert and location registration message.

  In step 633, similarly, in response to receiving the inquiry message, the server 2 unicasts a response including the corresponding disaster magnitude or seismic intensity information to the HSS B3. The HSS B3 stores the received information on the magnitude of the disaster or seismic intensity as a part of the safety information in association with the wireless terminal b3.

  Referring to FIG. 9B, in step 642, in response to receiving the safety notification participation message (step 604), HSS B1 multicasts a safety notification message including safety information regarding wireless terminal b1 to the safety notification group. To do. Here, the safety information includes location information, evacuation status, and other person safety reference (presence / absence) regarding the wireless terminal (b1) and the safety confirmation target person who is the subscriber. The safety notification message reaches the server X and the HSS A2 via the routers r1 and r2. The server X and the HSS A2 store the safety information of the received safety notification message as other person safety information. Here, the stored safety information is the safety information of a specific safety confirmation target person included in the other person safety information in each of the server X and the HSS A2 selected from the received safety information. Also good.

  In step 644, the server X transmits a safety notification leaving message to the network 5 by multicast in response to reception of the safety notification message. The safety notification withdrawal message may be transmitted when the safety of a subsequent safety confirmation target is confirmed when a disaster occurs. The safety notification leaving message reaches the router r2. The router r2 deletes the server X from the safety notification group.

  In step 646, HSS B2 similarly transmits a safety notification message including the safety information related to wireless terminal b2 by multicast to the safety notification group in response to reception of the safety notification participation message. The safety notification message reaches HSS A1 and A2 via routers r1 and r2. The HSS A1 and A2 store the safety information of the received safety notification message.

  In step 648, HSS B3 similarly transmits a safety notification message including the safety information regarding wireless terminal b3 to the safety notification group in response to reception of the safety notification participation message by multicast. The safety notification message reaches HSS A3 via routers r1 and r2. The HSS A3 stores the safety information of the received safety notification message.

  In Step 650, the HSS C1 similarly sends a safety notification message to the safety notification group by multicast in response to the reception of the safety notification participation message. The safety notification message reaches HSS A1 and A2 via routers r1 and r2. The HSS A1 and A2 store the safety information of the received safety notification message. In this case, since the HSS C1 has not received the safety information from the wireless terminal c1, the safety information indicates that the safety of the safety confirmation target person who owns the wireless terminal c1 is unknown.

  In Step 652, the HSS C 2 similarly transmits a safety notification message to the safety notification group by multicast in response to the reception of the safety notification participation message. The safety notification message reaches the HSS A1 via the routers r1 and r2. The HSS A1 stores the safety information of the received safety notification message. In this case, since the HSS C2 has not received the safety information from the wireless terminal c2, the safety information indicates that the safety of the safety confirmation target person who owns the wireless terminal c2 is unknown.

  Referring to FIG. 10A, it is assumed that the wireless terminals c1 and c2 of the safety confirmation target are activated by the safety confirmation target at time T3 and turned on after receiving the disaster warning. Thereafter, after receiving the disaster warning, the wireless terminals c1 and c2 execute the processing of Steps 662 and 666 when there is no operation or an operation input is received even after a certain time has elapsed.

  In step 662, the wireless terminal c1 transmits the location registration message to the HSS C1 in which the wireless terminal c1 is registered by unicasting via the neighboring relay APc1. The HSS C1 receives the location registration message, generates location information as part of the safety information of the wireless terminal c1, and stores it.

  In step 664, the HSS C1 sends an inquiry message to the server 2 in unicast in response to receiving the disaster alert and location registration message. In step 665, in response to receiving the inquiry message, the server 2 unicasts a response including the corresponding disaster magnitude or seismic intensity information to the HSS C1. The HSS C1 stores the received disaster magnitude or seismic intensity information as a part of the safety information in association with the wireless terminal c1.

  In step 666, the wireless terminal c2 transmits the location registration message to the HSS C2 in which the wireless terminal c2 is registered by unicasting via the neighboring relay APβ. The HSS C2 receives the location registration message, generates location information as part of the safety information of the wireless terminal c2, and stores it.

  In step 668, HSS C2 sends a query message to server 2 in unicast in response to receiving the disaster alert and location registration message. In step 669, in response to receiving the inquiry message, the server 2 unicasts a response including the corresponding disaster magnitude or seismic intensity information to the HSS C2. The HSS C2 stores the received disaster magnitude or seismic intensity information as a part of the safety information in association with the wireless terminal c2.

  In step 670, according to the operation of the safety confirmation target person, the wireless terminal b1 transmits the other-party safety reference message by unicast to the HSS B1 in which the wireless terminal b1 is registered. In step 671, in response to receiving the other person safety reference message, the HSS B1 transmits the other person safety information registered in association with the radio terminal b1 in the HSS B1 to the radio terminal b1 by unicast. The HSS B1 stores that the wireless terminal b1 has referred to the other person safety information or accessed the other person safety information. Here, the other person safety information includes a list of safety information of the safety confirmation target person received from the HSS (B2 or the like) other than the own HSS B1. Other person safety information is displayed on the wireless terminal b1.

  In step 682, which is the next cycle of the step 642, the HSS B1 transmits a safety notification message to the safety notification group by multicast. Here, the safety information is the latest safety information and may be updated after step 642. In this case, since the wireless terminal b2 referred to the other person safety information (step 670), the other person safety reference is “present” in the safety notification message. The safety notification message reaches HSS A2 via routers r1 and r2. The HSS A2 stores the safety information of the received safety notification message as the other person safety information.

  In step 684, the HSS A2 transmits a safety notification withdrawal message to the network 5 in multicast in response to receiving the safety notification message including the updated safety information. The safety notification leaving message reaches router r1 and HSS B1. Router r1 and HSS B1 delete HSS A2 from the safety notification group.

  In step 686, which is the next cycle of step 646, a safety notification message is transmitted by HSS B2 and received by HSS A1 and A2, as in step 646.

  In step 688, which is the next cycle of step 648, the safety notification message is transmitted by HSS B3 and received by HSS A3, as in step 648.

  In step 690, which is the next cycle of step 650, as in step 650, a safety notification message is transmitted by HSS C1 and received by HSS A1 and A2.

  In step 692, which is the next cycle of step 652, the safety notification message is transmitted by HSS C2 and received by HSS A1, as in step 652.

  Referring to FIG. 10B, in step 702, according to the operation of the safety confirmation target person, the wireless terminal b1 transmits another person safety reference message by unicast to the HSS B1 in which the wireless terminal b1 is registered. In Step 703, in response to receiving the other person safety reference message, the HSS B1 transmits the other person safety information registered in association with the wireless terminal b1 to the wireless terminal b1 by unicast. Other person safety information is displayed on the wireless terminal b1.

  In step 704, the wireless terminal b2 generates an evacuation status registration message based on the evacuation status input by the safety confirmation subject and transmits it to the HSS B2 by unicast. The HSS B2 registers the evacuation status of the wireless terminal b2 as part of the safety information according to the received evacuation status registration message. In this case, it is assumed that the evacuation status of the safety information is set to “evacuation complete” in the safety notification message.

  After that, it is assumed that the safety confirmation target person possessing the wireless terminal b3 moves out of the disaster area 7 (FIG. 1, broken line) and enters the communication range of the neighboring APb3. In step 706, since the wireless terminal b3 has moved into the communication range of the APb3, the location registration message is transmitted by unicast to the HSS B3 in which the wireless terminal b3 is registered via the neighboring relay APb3. The HSS B3 receives the location registration message, and generates and stores new location information as part of the safety information of the wireless terminal b3.

  In step 708, the HSS B3 transmits an inquiry message to the server 2 by unicast in response to receiving the location registration message after receiving the disaster warning. In step 709, in response to receiving the inquiry message, the server 2 sends a response including information on the magnitude or seismic intensity of the corresponding disaster to the HSS B3 by unicast. The HSS B3 stores the received disaster magnitude or seismic intensity information as a part of the updated safety information in association with the wireless terminal b3.

  In step 710, the wireless terminal c1 transmits the other party safety reference message by unicast to the HSS C1 in which the wireless terminal c1 is registered in accordance with the operation of the safety confirmation target person. The HSS C1 stores that there is a reference to the other person safety information by the wireless terminal c1. In step 711, in response to receiving the other person safety reference message, the HSS C1 transmits the other person safety information registered in association with the wireless terminal c1 to the wireless terminal c1 by unicast. Other person safety information is displayed on the wireless terminal c1.

  Referring to FIG. 10C, in step 722, which is the next cycle of step 686, a safety notification message is transmitted by HSS B2 and received by HSS A1 and A2, as in step 646. In this case, it is assumed that the evacuation status of the safety information is “evacuation completed” in step 704 in the safety notification message.

  In step 724, the HSS A1 transmits a safety notification withdrawal message to the network 5 in multicast in response to receiving the safety notification message including the updated safety information. The safety notification leaving message reaches the router r1. Router r1 deletes HSS A1 from the safety notification group.

  In step 726, the HSS A2 sends a safety notification withdrawal message to the network 5 in response to receiving the safety notification message including the updated safety information. The safety notification leaving message reaches the router r2 and the HSS B2. Routers r1, r2 and HSS B2 delete HSS A2 from the safety notification group.

  In step 728, which is the next cycle of step 688, a safety notification message is transmitted by HSS B3 and received by HSS A3, as in step 648. In this case, it is determined in step 706 that the wireless terminal b3 has moved out of the disaster-affected area 7, and in the received safety notification message, the location information of the safety information is “escape from the disaster area”.

  In step 730, the HSS A3 transmits a safety notification withdrawal message to the network 5 in multicast in response to reception of the safety notification message including the updated safety information. The safety notification leaving message reaches the router r2 and the HSS B2. Routers r1, r2 and HSS B2 delete HSS A2 from the safety notification group.

  In step 732, which is the next cycle of step 690, a safety notification message is transmitted by HSS C1 and received by HSS A1 and A2, similarly to step 650. In this case, since the wireless terminal c1 referred to the other person safety information in step 710, the other person safety reference is “present” in the safety notification message.

  In step 734, the HSS C1 transmits a safety notification leaving message to the network 5 in multicast in response to receiving the safety notification message including the updated safety information. The safety notification leaving message reaches the router r1. Routers r1 and r2 delete HSS A1 from the safety notification group.

  In step 736, the HSS A2 transmits a safety notification withdrawal message to the network 5 in response to receiving the safety notification message including the updated safety information. The safety notification leaving message reaches the router r1. Routers r1, r2 and HSS A2 delete HSS A2 from the safety notification group.

  In step 738, which is the next cycle after step 692, a safety notification message is transmitted by HSS C2 and received by HSS A1, as in step 652.

  Referring to FIG. 10D, steps 742 and 743 are similar to steps 702 and 703, respectively.

  In step 744, the wireless terminal b3 transmits the other-party safety reference message by unicast to the HSS B3 in which the wireless terminal b3 is registered. In step 745, in response to receiving the other person safety reference message, the HSS B3 transmits the other person safety information registered in association with the wireless terminal b3 in the HSS B3 to the wireless terminal b3 by unicast.

  Steps 746 and 747 are similar to steps 710 and 711, respectively.

  Thereafter, it is assumed that the safety confirmation target person who possesses the wireless terminal c2 moves within the disaster area 7 (FIG. 1, broken line) and enters the communication range of the neighboring APγ. In step 748, since the wireless terminal c2 has moved into the communication range of the APγ, the wireless terminal c2 transmits the location registration message to the HSS C2 in which the wireless terminal c2 is registered via the neighboring relay APγ by unicast. The HSS C2 receives the location registration message, generates and stores updated location information as part of the safety information of the wireless terminal c2. In this case, in the HSS C2, since the wireless terminal c2 has moved within the disaster area 7, the position information of the safety information is “movement within the disaster area”.

  In step 750, the HSS C2 transmits an inquiry message to the server 2 by unicast in response to receiving the location registration message after receiving the disaster warning. In step 751, in response to receiving the inquiry message, the server 2 unicasts a response including the corresponding disaster magnitude or seismic intensity information to the HSS C2. The HSS C2 stores the received disaster magnitude or seismic intensity information as a part of the updated safety information in association with the wireless terminal c2.

  In step 762, which is the next cycle of step 738, a safety notification message is transmitted by HSS C2 and received by HSS A1, as in step 652. In this case, it is determined in step 748 that the wireless terminal c2 has moved within the disaster area, and the position information of the safety information is “movement within the disaster area” in the received safety notification message.

  Next, data stored by the wireless terminals 51 to 59, the HSS 11 to 19, and the organization server 21 and messages to be transmitted and received will be described.

  FIG. 11 illustrates an example of data of the wireless terminals 51 to 59 generated and stored in the wireless terminals 51 to 59.

  In FIG. 11, the data of the wireless terminals 51 to 59 includes fields of its own terminal identifier, own terminal address, HSS address, time stamp, relay AP identifier, and evacuation status, and is stored in the storage unit 504. The own terminal address is an address for communication at the current position of the wireless terminals 51 to 59. The HSS address is an HSS address where the wireless terminals 51 to 59 are registered as subscribers. The time stamp is the data update time of each of the wireless terminals 51-59. The relay AP identifier is an identifier of a neighboring relay AP with which each of the wireless terminals 51 to 59 is performing wireless communication. The evacuation status is input information that is input or selected and input by the owner of each of the wireless terminals 51 to 59.

  The data of the wireless terminals 51 to 59 includes, for example, the own terminal identifier “T # b2”, the own terminal address “ADDR_ # b2”, and the HSS address “ADDR_Home # B2”. The data of the wireless terminals 51 to 59 further includes, for example, a time stamp “2014/08/2009: 00: 00: 000” (August 20, 9:00), relay AP identifier “AP # α”, and evacuation status Includes “evacuation complete (safe)”. The evacuation status is blank when there is no input information.

  FIG. 12 shows an example of subscriber data of the wireless terminals 51 to 59 in the HSSs 11 to 19. Here, the subscriber data includes safety information.

  In FIG. 12, the subscriber data of the wireless terminals 51 to 59 in the HSSs 11 to 19 are HSS identifier (ID), terminal identifier (ID), terminal address, HSS address, safety notification group address, and disaster warning server address. Contains each field. The subscriber data further includes a time stamp, a relay AP identifier, location information, an evacuation status, and other person safety reference as safety information. The subscriber data further includes presence / absence of participation in safety notification indicating participation in the safety notification with the own HSS address as the transmission source, and a disaster area threshold.

  The HSS identifier is an identifier of the corresponding HSS 11 to 19 in which the subscriber information of each wireless terminal 51 to 59 is registered. The HSS address is the address of the corresponding HSS 11-19. The safety notification group address is a multicast address of the safety notification group. The disaster warning server address is the address of the server 2 for disaster warning. The time stamp is the update time of the safety information. The location information is location information related to the affected area as the safety information of each of the wireless terminals 51 to 59. The evacuation situation is an evacuation situation that is input by the safety confirmation subject and received from each of the wireless terminals 51 to 59. The other person safety reference represents the presence or absence of access or reference to the other party safety information (FIG. 13) by the wireless terminals 51 to 59. The presence / absence of safety notification participation indicates whether participation in the safety notification group with the HSS 11 to 19 as a transmission source by the HSS 11 to 19 or the server 21 is set in the HSS 11 to 19. The disaster area threshold value is a threshold value or standard of the magnitude or seismic intensity of the disaster used to determine that the area of the communication range of each of the radio base stations 31 to 40 is the disaster area (7).

  The subscriber data includes, for example, an HSS identifier “Home # B2”, a terminal identifier “T # b2”, a terminal address “ADDR_ # b2”, an HSS address “ADDR_Home # B2”, and a safety notification group address “MC_ADDR_ # m”. Is included. The subscriber data further includes, for example, the disaster alert server address “ADDR_DisasterAlrmSrvr”. The subscriber data further includes, for example, a time stamp “2014/08/2009: 00: 00: 000”, a relay AP identifier “AP # α”, location information “in the disaster area (seismic intensity 3)”, and an evacuation status “evacuation” "Complete (safe)", and others safety reference "Implementation". The subscriber data further includes, for example, presence / absence of presence / absence of participation in safety notification and a disaster area threshold “seismic intensity 3”.

FIG. 13 shows an example of another person safety information table in the HSS 11-19.
In FIG. 13, the other person safety information table includes, for example, fields of a safety confirmation target (identification information), an HSS address, a notification reception display, position information, an evacuation status, other person safety reference, and a time stamp. .

  The safety confirmation target person may be, for example, the name or identification number of the safety confirmation target person who possesses the wireless terminal. The HSS address is an address of the HSS where the wireless terminals 51 to 59 of the safety confirmation subject are registered. The notification reception display is a state of receiving or stopping a safety notification (in the HSS) with the HSS address and the wireless terminals 51 to 59 registered as the transmission source, that is, to the safety notification group. Indicates participation or withdrawal status.

  The other person safety information table includes, for example, a safety confirmation target person (name) “B2”, an HSS address “ADDR_Home # B2”, and a notification reception display “receiving”. The other person safety information table further includes, for example, position information “within the disaster area (seismic intensity 3)”, evacuation status “evacuation completed”, other person safety reference “not implemented”, and time stamp “2014/08/20 09:00:00”. : 00: 000 ".

  FIG. 14A shows an example of the safety notification leaving condition table in the server 21 of the HSS 11 to 19 or the organization X. FIG. 14B shows another example of the safety notification leaving condition table in the server 21 of the HSS 11 to 19 or the organization X.

  14A and 14B, the safety notification group departure condition table includes fields of position information, evacuation status, and other person safety reference. The position information is a condition of position information determined to match. The evacuation situation is a condition of the evacuation situation that is determined to match. The other person's safety reference is a condition of the other person's safety reference that is determined to match. Arbitrary indicates that it is determined to match in any case. “Not null” represents that it is determined that the information matches if any input information of the evacuation situation is stored.

  In FIG. 14A, for example, when the location information “outside the disaster area”, the evacuation status “(optional)”, and the other person's safety reference “execution” (safety notification withdrawal condition) are satisfied, that is, the wireless terminal is outside the disaster area. If the user is located and the other person's safety information is referenced, a safety notification withdrawal message is transmitted. Further, for example, when the location information “escape from the disaster area”, the evacuation status “(optional)”, and the other person's safety reference “execution” (safety notification withdrawal condition) are satisfied, that is, the wireless terminal moves out of the disaster area. In addition, when there is a reference to the other person's safety information, a safety notification leaving message is transmitted. Further, for example, when the position information “(arbitrary)”, the evacuation situation “(not null)”, and the other person's safety reference “(arbitrary)” (safety notification withdrawal condition) are satisfied, that is, the input information is included in the evacuation situation. If present, a safety notification leaving message is transmitted.

  In FIG. 14B, for example, when the location information “outside the affected area”, the evacuation status “(optional)”, and the other person's safety reference “(optional)” (safety notification withdrawal condition) are satisfied, that is, the wireless terminal is in the affected area. When it is located outside, a safety notification leaving message is transmitted. Further, for example, when the location information “escape from the disaster area”, the evacuation status “(optional)”, and the other person's safety reference “execution” (safety notification withdrawal condition) are satisfied, the safety notification withdrawal message is transmitted. Also, for example, when the location information “(arbitrary)”, the evacuation status “(not null)”, and the other person's safety reference “(arbitrary)” (safety notification withdrawal condition) are satisfied, a safety notification withdrawal message is transmitted. Is done.

FIG. 15 is an example of a seismic intensity information table in the server 2 for disaster warning.
In FIG. 15, the seismic intensity information table includes seismic intensity meter ID and seismic intensity fields. The seismometer ID is an identifier or identification information of the seismometer. Seismic intensity is the value of seismic intensity measured with a seismic intensity meter. The seismic intensity information table includes, for example, seismic intensity meter ID “# α1” and seismic intensity “1”.

  FIG. 16 shows an example of the AP neighborhood seismometer list in HSS 11-19.

  In FIG. 16, the AP neighborhood seismometer list includes fields of an AP identifier and a neighborhood seismometer ID. The neighborhood seismometer ID is an identifier or identification information of a seismometer located near the AP. The AP neighborhood seismometer list includes, for example, an AP identifier “AP # α” and a neighborhood seismometer ID “α1”.

  FIG. 17 shows an example of an evacuation status registration message transmitted from each of the wireless terminals 51 to 59 to the corresponding HSS 11-19.

  In FIG. 17, the evacuation status registration message is a message indicating the evacuation status of the safety confirmation subject entered by the safety confirmation subject. The evacuation status registration message includes fields of a source address (SA) and a destination address (DA) and TCP data in an L1 header, an L2 header, and an IP header. The TCP data includes a terminal identifier, an evacuation status, and a time stamp in the wireless terminals 51 to 59.

  The transmission source address is the address of the wireless terminals 51 to 59 of the safety confirmation subject who is the message transmission source. The destination address is an address of the HSS 11 to 19 in which the wireless terminals 51 to 59 of the safety confirmation subject are registered. The terminal identifier is a terminal identifier of the wireless terminals 51 to 59 of the safety confirmation target person who is the transmission source of the evacuation status registration message. The evacuation status is information indicating the evacuation status that is input and registered by the safety confirmation target person. The time stamp is the time when the evacuation status registration message is generated.

  The evacuation status registration message of the wireless terminal 56 (b2) includes, for example, a transmission source address “ADDR_ # b2”, a destination address “ADDR_Home # B2”, a terminal identifier “T # b2”, and an evacuation status “evacuation completion (safe)”. Is included.

  FIG. 18A shows an example of an inquiry message transmitted from each HSS 11 to 19 to the server 2 for disaster warning.

  The inquiry message is a message for inquiring the magnitude or seismic intensity of the disaster to the server 2 for disaster warning. The inquiry message includes fields of a source address (SA) and a destination address (DA), and TCP data in an L1 header, an L2 header, and an IP header. The TCP data includes a seismometer list including one or more seismometer IDs (identifiers or identification information) in the server 2.

  The inquiry message of HSS16 (B2) includes, for example, a source address “ADDR_Home # B2”, a destination address “ADDR_DisasterAlrmSrvr”, and a seismometer list “Seismometer # α1, Seismometer # α2, Seismometer # α3”. .

  FIG. 18B shows an example of a response message transmitted from the disaster warning server 2 to each of the wireless terminals 51 to 59 in response to the inquiry message.

  The response message includes fields of a source address (SA) and a destination address (DA), and TCP data in an L1 header, an L2 header, and an IP header. The TCP data includes, as a seismic intensity information list, a seismic intensity information list including one or more seismometer IDs in the server 2 and the measured seismic intensity information.

  The response message includes, for example, a transmission source address “ADDR_DisasterAlrmSrvr”, a destination address “ADDR_Home # B2”, and a seismic intensity information list “Seismic intensity meter # α1: Seismic intensity 1; Seismic intensity meter # α2: Seismic intensity 1; Is included.

  FIG. 19A shows an example of another person safety reference message transmitted from each wireless terminal 51 to 59 to each corresponding HSS 11 to 19.

  In FIG. 19A, the other person safety reference message includes fields of a source address (SA), a destination address (DA), and TCP data in an L1 header, an L2 header, and an IP header. The TCP data includes the terminal identifiers of the source wireless terminals 51 to 59.

  The other person safety reference message includes, for example, a transmission source address “ADDR_ # b2”, a destination address “ADDR_Home # B2”, and a terminal identifier “T # b2”.

  FIG. 19B shows an example of a response message transmitted from each HSS 11-19 to each wireless terminal 51-59 in response to the other person safety reference message.

  In FIG. 19B, the response message includes fields of a source address (SA) and a destination address (DA), and TCP data in an L1 header, an L2 header, and an IP header. The TCP data includes information on a safety confirmation target person, position information, an evacuation situation, and other person safety reference as the other person safety information list. The safety confirmation target person may be, for example, a name or identification information. The position information may include, for example, “within the disaster area”, “outside the disaster area”, “movement within the disaster area”, or “escape from the disaster area”, and optionally the seismic intensity within the disaster area. The evacuation status may be, for example, “evacuation complete” or blank. The other person's safety reference may be implemented or not implemented, for example.

  The response message includes, for example, a transmission source address “ADDR_Home # B2” and a destination address “ADDR_ # b2”. In addition, the response message includes, for example, a safety confirmation target person “B2”, position information “within the disaster area (seismic intensity 3)”, evacuation status “evacuation completed”, and other person safety reference “unimplemented” "Is included.

  FIG. 20 is transmitted by multicast from the HSSs 14 to 19 in which the wireless terminals 54 to 59 of the safety confirmation subject are registered to the HSSs 11 to 13 in which the wireless terminals 51 to 53 of the safety confirmation person are registered or the server 21 of the organization X. An example of a safety notification message is shown.

  In FIG. 20, the safety notification message includes fields of a source address (SA), a destination address (DA), and TCP data in an L1 header, an L2 header, and an IP header. The TCP data includes a safety confirmation target person (name or identification information), position information, evacuation status, safety reference for others, and a time stamp. The time stamp is the time when the location information, the evacuation status, or the other person's safety reference was last updated.

  The safety notification message includes, for example, a transmission source address “ADDR_Home # B2”, a destination address “MC_ADDR_ # m1”, location information “disaster area (seismic intensity 3)”, evacuation status “evacuation completion (safety)”, and other person's safety reference Includes “Implementation”.

  FIG. 21 shows the safety notification transmitted to the HSSs 14 to 19 in which the wireless terminals 54 to 59 of the safety confirmation target are registered by the HSS 11 to 13 in which the wireless terminals 51 to 53 of the safety confirmer are registered and the server 21. An example of a participation message (MLD-join) is shown.

  The safety notification participation message conveys a request presence notification addressed to the safety notification group to be received by the listener to the rendezvous point or the source AP. The safety notification participation message is also a multicast distribution related to safety information or a participation signal to a multicast group, a participation expression signal, or a participation request signal. The safety notification participation message includes fields of a source address (SA) and a destination address (DA) and ICMPv6 (Internet Control Message Protocol for IPv6) data in an L1 header, an L2 header, and an IP header. ICMPv6 data includes a type and a multicast address record.

  The source address is an address of the HSS 11 to 13 in which the safety confirmation person wireless terminals 51 to 53 are registered. The destination address is a multicast address for all multicast routers. The type is “Type = Version 2 Multicast Listener Report”, which represents a listener report for causing the router to receive multicast. The multicast address record contains the record type, the multicast address, and the source address (SA) of the HSS 14-19 of the multicast delivery to receive. The source addresses of the HSSs 14 to 19 may be HSS IP addresses, but can also be obtained from the HSS identifier by the DSN name resolution method.

  The safety notification participation message from the HSS 11 includes, for example, a transmission source address “ADDR_Home # A1” and a destination address “FF02: 0: 0: 0: 0: 0: 0: 16”. The multicast address record includes, for example, a record type “Record Type = Allow_New_Sources” and a multicast address (safety notification group address) “MC_ADDR_ # m1”. The multicast address record further includes, for example, the transmission source addresses “ADDR_Home # B2”, “ADDR_Home # C1”, and “ADDR_Home # C2” of the multicast distribution AP.

  FIG. 22 shows the safety notification transmitted by the HSSs 11 to 13 in which the wireless terminals 51 to 53 of the safety confirmer are registered and the server 21 to the HSSs 14 to 19 in which the wireless terminals 54 to 59 of the safety confirmation target are registered. An example of a leave message (MLD-leave) is shown.

  The safety notification withdrawal message is used to inform the rendezvous point or the transmission source AP of the safety notification group that the listener is about to leave. The safety notification withdrawal message is also a withdrawal signal for leaving the multicast distribution or the multicast group regarding the safety information. Similar to the safety notification participation message, the safety notification leaving message includes fields of a source address (SA), a destination address (DA), and ICMPv6 data in an L1 header, an L2 header, and an IP header.

  The transmission source address and the destination address include fields similar to those in the safety notification participation message. In this case, the multicast address record includes, for example, a record type “Record Type = Block_Old_Sources” and a multicast address (safety notification group address) “MC_ADDR_ # m1”. The multicast address record includes, for example, the source address “ADDR_Home # B2” of the HSS 16.

  Next, operations and processes of the HSSs 16 and 11 and the wireless terminals 56 and 51 will be described. However, the following description of operations and processes related to the HSS 16 is similarly applied to the other HSSs 11 to 15 and 17 to 19. In addition, the following description of operations and processes related to the HSS 11 is similarly applied to the other HSSs 12 to 19. In addition, the following description of the operation and processing regarding the wireless terminal 56 is similarly applied to the other wireless terminals 51 to 55, 57, and 59. In addition, the following description of operations and processes related to the wireless terminal 51 is similarly applied to the other wireless terminals 52 to 59.

  FIG. 23 shows an example of a flowchart of a process for transmitting a safety notification participation message, which is executed by each of the HSSs 16 and 11 when a disaster warning is received.

  Referring to FIG. 23, in step 802, the processor 102 (or the safety information management unit 1024) of the HSS 16 in which the wireless terminal 56 of the safety confirmation target is registered is a subscriber of the wireless terminal 56 as the safety confirmation target. Initialize the safety information. Here, the safety information is illustrated in FIG. 12, and includes, for example, a relay AP identifier, location information, an evacuation situation, other person safety reference, and a time stamp. Step 802 is a process of initializing the safety information of the HSS 16 subscriber as the safety confirmation subject. The HSS 11 also operates in the same manner with respect to the subscriber's wireless terminal 51 as a safety confirmation subject.

  In step 804, the processor 102 (safety information management unit 1024) of the HSS 11 in which the wireless terminal 51 of the safety checker is registered initializes the safety information of each safety check target person in the other person safety information table. Here, the other person safety information table is exemplified in FIG. 13, and includes, for example, the safety confirmation target person's HSS address, notification reception display, location information, evacuation status, other person safety reference, and time stamp. Yes. Step 804 is processing for initializing other person safety information received and stored by the HSS 11 as a safety confirmer. The HSS 16 also operates in the same manner with respect to its own other person safety information table.

  In step 806, the processor 102 (safety information management unit 1024) of the HSS 11 sets the notification reception display of each safety confirmation target person in the other person safety information table as “receiving”. The notification reception display “receiving” may indicate that the safety notification participation message is transmitted and that the safety notification message is ready to be received. The HSS 16 also operates in the same manner for the notification reception display of the other person safety information table.

  In step 808, the processor 102 (safety information management unit 1024) of the HSS 11 transmits a safety notification participation message to the network 5 by multicast. Here, the safety notification participation message includes the HSS address of each safety confirmation target person in the other person safety information table as the source address in the multicast address record. The safety notification participation message is illustrated in FIG. The safety notification participation message transmitted by the HSSs 11 to 13 and the server 21 is received by the other HSSs 14 to 19, for example. Similarly, the HSS 16 can also transmit a safety notification participation message for the safety checker.

  FIG. 24 shows an example of a flowchart of processing for transmitting a safety notification participation message, which is executed by the server 21 of the organization X of the safety confirmer.

  Referring to FIG. 24, steps 814 to 818 are the same as steps 804 to 808 executed by the HSS 16 of FIG. 23, respectively, and are executed by the processor 102 (safety information management unit 1024) of the server 21. Since the server 21 does not manage subscriber information, there is no processing corresponding to step 802 in FIG.

  FIG. 25 shows an example of a flowchart of processing for setting presence / absence of safety notification participation performed by the HSS 16 when a safety notification participation message is received.

  Referring to FIG. 25, in step 822, the processor 102 (safety information management unit 1024) of the HSS 16 acquires a transmission source address in a multicast address record in the received safety notification participation message.

  In step 824, the processor 102 (safety information management unit 1024) determines whether the source address in the multicast address record has its own HSS address. If it is determined that the source address has its own HSS address, the procedure proceeds to step 826. If it is determined that the source address does not have its own HSS address, the procedure exits the routine of FIG.

  In step 824, the processor 102 (safety information management unit 1024) sets “Yes” in the presence / absence of participation (safety notification participation) in the safety notification using the own HSS address in the subscriber data of the wireless terminal 56. Set. As a result, the HSS 16 periodically transmits a safety notification message to the safety notification group. Thereafter, the procedure exits the routine of FIG.

  FIG. 26 shows an example of a flowchart of processing for generating and transmitting a location registration message executed by the wireless terminal 56 of the safety confirmation subject.

  Referring to FIG. 26, in step 832, the processor 502 of the wireless terminal 56 (or its safety information registration processing unit 5024) responds to the reception of the disaster alarm from the storage unit 504 and relays the terminal identifier and relay of the wireless terminal 56. Get the AP identifier. The relay AP identifier is an identifier of a wireless base station (AP) 36 that is in the vicinity of the wireless terminal 56 and relays communication of the wireless terminal 56.

  In step 834, the processor 502 (safety information registration processing unit 5024) generates a location registration message including the terminal identifier and the relay AP identifier, and transmits the location registration message to the HSS address of the HSS 16 in which the wireless terminal 56 is registered. To do. The HSS 16 receives the location registration message from the wireless terminal 56.

  27A and 27B show an example of a flowchart of processing for setting the location information of the wireless terminal 56 related to the disaster, which is executed by the HSS 16 in which the wireless terminal 56 of the safety confirmation subject is registered.

  Referring to FIG. 27A, in step 842, the processor 102 (safety information management unit 1024) of the HSS 16 receives the location registration message from the wireless terminal 56, and relays the location registration message received from the wireless terminal 56 after receiving the disaster warning. Retrieve the AP identifier.

  In step 844, the processor 102 (safety information management unit 1024) determines whether or not the relay AP has been changed from the previous relay AP after receiving the disaster warning. The previous relay AP is identified by the relay AP identifier in the safety information of the subscriber data. If it is determined that the relay AP has been changed from the previous time, the procedure proceeds to step 846. Since the relay AP in the safety information is initialized and deleted immediately after receiving the disaster warning (FIG. 23), it is determined that the relay AP has been changed when the location registration message is received for the first time after receiving the disaster warning. If it is determined that the relay AP has not been changed since the previous time, the safety information is not changed, and the procedure exits the routines of FIGS. 27A and 27B.

  In step 846, the processor 102 (safety information management unit 1024) extracts a list of neighborhood seismometer IDs corresponding to the relay AP identifier received from the terminal device 56 from the AP neighborhood seismometer list in the storage device 106.

  In step 848, the processor 102 (safety information management unit 1024) generates an inquiry message for inquiring the seismic intensity and transmits it to the server 2 for disaster warning. The inquiry message includes a list of neighborhood seismometer IDs of the received relay AP identifiers. The AP neighborhood seismometer list is illustrated in FIG.

  In step 850, the server 2 receives the inquiry message from the HSS 16 and extracts the seismic intensity information corresponding to the seismic intensity meter ID in the inquiry message from the seismic intensity information table to generate a seismic intensity information list. The seismic intensity information table is illustrated in FIG.

  In step 852, the server 2 generates a response message including the generated seismic intensity information list and transmits it to the HSS 16. In step 854, the processor 102 (safety information management unit 1024) of the HSS 16 receives a response message from the server 2.

  In step 856, the processor 102 (safety information management unit 1024) of the HSS 16 extracts the maximum seismic intensity in the seismic intensity information list from the received response message.

  Referring to FIG. 27B, in step 862, processor 102 (safety information management unit 1024) determines whether or not the maximum seismic intensity corresponds to the seismic intensity level “within the disaster area”. The seismic intensity level “in the affected area” may be, for example, a threshold seismic intensity of 3 or 4 or more. If it is determined that the maximum seismic intensity does not correspond to the seismic intensity level “in the affected area”, the procedure proceeds to step 872. If it is determined that the maximum seismic intensity corresponds to the seismic intensity level “within the affected area”, the procedure proceeds to step 874.

  In step 864, the processor 102 (safety information management unit 1024) determines whether or not the previous location information of the wireless terminal 56 is “within the disaster area”. If it is determined that the position information is “in the affected area”, the procedure proceeds to step 866. If it is determined that the position information is not “in the affected area”, the procedure proceeds to step 868.

  In step 866, the processor 102 (safety information management unit 1024) changes the relay AP, the current seismic intensity is “in the disaster area”, and the previous position information is “in the disaster area”. “Move in affected area” is set in the position information of the safety information. At that time, seismic intensity may be added to the position information. This location information “movement within the disaster area” represents, for example, the movement of the wireless terminal 57 in FIG. 1, and the wireless terminal 57 is, for example, between the communication ranges of two relay APβs and APγ within the same disaster area 7. Indicates that it has moved.

  In step 868, the processor 102 (safety information management unit 1024) determines whether or not the previous position information is unknown. For example, when the position information is initialized and not set, it is determined that the position information is unknown. If it is determined that the position information is unknown, the procedure proceeds to step 870. If the previous position information is not unknown, that is, if it is determined that the position information is “outside the affected area”, the wireless terminal 56 has moved from outside the affected area 7 into the affected area 7, so the procedure is as shown in FIGS. 27A and 27B. Exit the routine. In this case, for example, the safety confirmation target person may move from the outside of the disaster area 7 into the disaster area 7 and perform a rescue operation.

  In step 870, the processor 102 (safety information management unit 1024) sets “within the disaster area” in the position information of the safety information. At that time, seismic intensity may be added to the position information.

  In step 872, the processor 102 (safety information management unit 1024) determines whether or not the previous location information stored is “within the disaster area”. If it is determined that the position information is “in the affected area”, the procedure proceeds to step 874. If it is determined that the position information is not “in the disaster area”, the wireless terminal 56 has moved from outside the disaster area 7 to another area outside the disaster area 7, so that the position information is not changed, and the procedure is as shown in FIGS. 27A and 27B. Exit the routine.

  In step 874, the processor 102 (safety information management unit 1024) determines whether or not the previous position information is unknown. If it is determined that the position information is unknown, the procedure proceeds to step 878. If the previous position information is not unknown, that is, if it is determined that the position information is “in the disaster area”, the wireless terminal 56 has moved out of the disaster area 7 and out of the disaster area 7, and the procedure proceeds to step 876.

  In step 876, the processor 102 (safety information management unit 1024) sets “escape from the disaster area” in the position information regarding the wireless terminal 56. This location information “escape from the disaster area” represents, for example, the movement of the wireless terminal 59 in FIG. 1, and the wireless terminal 59 communicates with the APb3 outside the disaster area 7 from the communication range of the relay APδ in the disaster area 7, for example. Represents moving to range.

  In step 878, the processor 102 (safety information management unit 1024) sets “out of the disaster area” for the wireless terminal 56 to the position information of the safety information. After steps 866, 870, 876 and 878, the procedure exits the routine of FIGS. 27A and 27B.

  In this way, the HSS 16 can set the position information of the wireless terminal 56 regarding the disaster of the safety confirmation target person as a part of the safety information.

  FIG. 28 shows an example of a flowchart of processing for generating and transmitting an evacuation status registration message executed by the wireless terminal 56 of the safety confirmation subject.

  Referring to FIG. 28, in step 882, the processor 502 (safety information registration processing unit 5024) accepts input characters relating to the evacuation situation input by the safety confirmation target person. In step 884, the processor 502 (safety information registration processing unit 5024) stores the input character as an evacuation status of the safety information.

  In step 886, the processor 502 (safety information registration processing unit 5024) generates an evacuation situation message including the inputted evacuation situation and transmits it to the corresponding HSS address of the HSS 16.

  In step 888, the HSS 16 receives the evacuation situation message, and stores the evacuation situation in the evacuation situation message as part of the safety information regarding the wireless terminal 56. In this way, the wireless terminal 56 can register the evacuation status of the subscriber as the safety confirmation subject as a part of the safety information in the corresponding HSS 16.

  FIG. 29 shows an example of a flowchart of processing for transmitting a safety notification message executed by the HSS 16. The process of FIG. 29 may be executed periodically, for example, every minute.

  In step 892, the processor 102 (safety information management unit 1024) of the HSS 16 determines whether or not participation (safety notification participation) in the safety notification using the own HSS address of the HSS 16 is set in the subscriber data. To do. If it is determined that the participation in the safety notification with the own HSS address as the transmission source is set as “present”, the procedure proceeds to step 894. When it is determined that participation in the safety notification with the own HSS address as the transmission source is set to “none”, the safety notification message is not transmitted, and the procedure exits the routine of FIG.

  In step 894, the processor 102 (safety information management unit 1024) generates a safety notification message including the safety information in the subscriber data of the wireless terminal 56 of the safety confirmation target person, and transmits the safety notification message to the safety notification group by multicast. Here, the safety information includes the position information of the safety confirmation target person, the evacuation situation, the other person's ratio reference, and the time stamp. Thereafter, the procedure exits the routine of FIG.

  In this way, the HSS 16 multicasts the safety information of the safety confirmation target person possessing the wireless terminal 56 to the safety confirmation person HSSs 11 and 12 including this safety confirmation target person in the other person safety information table. can do. The other HSSs 14, 15, 17, and 19 also operate in the same manner as the HSS 16 and transmit the safety information of the safety confirmation target person possessing the wireless terminals 54, 55, 57, and 59 to the HSSs 11 to 13 of the safety confirmer. be able to.

  FIG. 30 shows an example of a flowchart of a determination process executed by the HSS 11 or the organization X server 21 when receiving the safety notification message to determine whether to leave the safety notification group when receiving the safety notification message. Yes.

  Referring to FIG. 30, in step 904, the processor 102 (safety information management unit 1024) of the HSS 11 or the server 21 stores the safety information of the received safety notification message. At that time, the processor 102 (safety information management unit 1024) stores the safety information of the safety notification message in a record in the other person safety information table corresponding to the transmission source address of the received safety notification message. Here, the safety information includes the position information of the safety confirmation target person, the evacuation situation, the other person's ratio reference, and the time stamp. The other person safety information table is illustrated in FIG.

  In step 906, the processor 102 (safety information management unit 1024) determines whether or not the state of the safety information matches the safety notification withdrawal condition. The state of the safety information includes position information, evacuation status, and other person safety reference. The safety notification withdrawal condition is illustrated in FIGS. 14A and 14B. If it is determined that the state of the safety information matches the safety notification withdrawal condition, the procedure proceeds to step 908. If it is determined that the state of the safety information does not match the safety notification withdrawal condition, the procedure exits the routine of FIG.

  In step 908, the processor 102 (safety information management unit 1024) transmits a safety notification leaving message including the transmission source address of the safety notification message in the multicast address record to the network 5 by multicast. As a result, the HSS 11 or the server 21 can leave the safety notification group. On the other hand, even if the HSS 11 or the server 21 leaves the safety notification group, the wireless terminal 51 or the terminal device 60 can access the other person's safety information of the HSS 11 or the server 21.

  FIG. 31 shows an example of a flowchart of processing at the time of reception of the safety notification withdrawal message executed by the HSS 16. The process of FIG. 31 may be executed, for example, at a cycle of 1 minute.

  Referring to FIG. 31, in step 912, the processor 102 (safety information management unit 1024) of the HSS 16 determines whether or not its own HSS address is present in the multicast address record of the received safety notification withdrawal message. If it is determined that there is its own HSS address, the procedure proceeds to step 914. If it is determined that there is no self HSS address, the procedure exits the routine of FIG.

  In step 914, the processor 102 (safety information management unit 1024) sets “None” to the presence / absence of participation in the safety notification with its own HSS address as the transmission source. Thereafter, the procedure exits the routine of FIG.

  FIG. 32 shows an example of a flowchart of processing for referring to the safety of others executed by the wireless terminal 51 or 56 and the terminal device 60.

  Referring to FIG. 32, in step 922, the processor 502 (or the safety information reference unit 5026) of the wireless terminal 51 or 56 generates another person safety confirmation message in accordance with the operation of the safety confirmer, and the corresponding HSS 11 or 16 to send. Similarly, the terminal device 60 generates another person safety confirmation message and transmits it to the server 21 in accordance with the operation of the safety confirmer.

  In step 924, the processor 102 (safety information management unit 1024) of the HSS 11 or 16 generates a response message including the other person safety information and transmits it to the wireless terminal 51 or 56 in response to the reception of the other person safety reference message. To do. Similarly, the server 21 generates a response message including the other person safety information and transmits the response message to the terminal device 60.

  In step 926, the processor 102 (safety information management unit 1024) of the HSS 11 or 16 sets “execution” to the other person's safety reference in the safety information in the subscriber data.

  In step 928, the processor 502 (safety information reference unit 5026) of the wireless terminal 51 or 56 receives the response message. In step 930, the processor 502 (safety information reference unit 5026) displays the other person's safety information in the response message on the display unit 512 of the wireless terminals 51 to 59. The table of other person safety information is illustrated in FIG. Similarly, the terminal device 60 receives the response message and displays the other person safety information in the response message on the terminal device 60.

  33A and 33B show the wireless terminals a1 to a3, c1, c2, HSS A1 to A3, C1, C2, A1 to A3, and the organization X server of the safety confirmation subject at time T1 in the transmission and reception sequence of FIG. 9A. An example of X data is shown.

  At the first time T0 of FIG. 9A, the power of the wireless terminals b1 to b3 of the safety confirmation target person is in the on state, and the power of the wireless terminals c1 and c2 of the safety confirmation target person is in the off state. Therefore, in FIG. 33A, “AP # b1”, “AP # α”, and “AP # δ” are set as the relay AP identifiers for the wireless terminals b1 to b3, respectively, but relayed to the wireless terminals b1 to b3. AP identifier is not set. On the other hand, since each of the HSSs B1 to B3, C1 and C2 to which the wireless terminals b1 to b3, c1 and c2 are registered has received the safety notification participation message in steps 604 to 610 in FIG. “Yes” is set (dashed line).

  HSS A1 to A3 (HSS identifier: Home # A1 to Home # A3) in which the wireless terminals a1 to a3 (terminal identifiers: T # a1 to T # a3) of the safety confirmation person are registered and the server X of the organization X are illustrated in FIG. The safety confirmation participation message was transmitted in steps 604 to 610 of 9A. Therefore, in FIG. 33B, in the HSS A1 of the wireless terminal a1 of the safety confirmer, the notification reception display regarding the other person safety information of the safety confirmation target persons B2, C1, and C2 is “receiving”. Similarly, in the HSS A2 of the wireless terminal a2 of the safety confirmer A2, each notification reception display regarding the other person safety information of the safety confirmation target persons B1, B2, and C1 is “receiving”. Similarly, in the HSS A3 of the wireless terminal a3 of the safety confirmation person A3, the notification reception display regarding the other person safety information of the safety confirmation target person B3 is “receiving”. Similarly, in the server X to which the terminal device a4 of the organization X is connected, the notification reception display regarding the other person safety information of the safety confirmation target person B1 is “receiving”.

  34A and 34B show the wireless terminals a1 to a3, c1, c2, HSS A1 to A3, C1, C2, A1 to A3, and organization X servers of the safety confirmation target person at time T2 in the transmission and reception sequence of FIG. 9A. An example of X data is shown.

  The wireless terminals b1 to b3 of the safety confirmation subjects transmitted location registration messages to the respective HSSs B1 to B3 in steps 622, 626, and 630 in FIG. 9A. Therefore, the relay AP identifiers “AP # b1”, “AP # α”, and “AP # δ” are set in the HSS B1 to B3 in FIG. 34A (broken lines). The HSS B1 to B3 inquires the server 2 about the seismic intensity in steps 624 and 625 and determines that the positions of the wireless terminals b1 to b3 are outside the disaster area and inside the disaster area. Accordingly, in the HSS B1 to B3 of FIG. 34A, position information “outside the disaster area”, “in the disaster area (seismic intensity 3)”, and “in the disaster area (seismic intensity 2)” are set (broken line).

  35A and 35B show the wireless terminals a1 to a3, c1, c2, HSS A1 to A3, C1, C2, A1 to A3, and organization X servers of the safety confirmation target person at time T3 in the transmission and reception sequence of FIG. 9B. An example of X data is shown.

  HSS A1-A3 and server X received the safety notification message in steps 642 and 646-652 in FIG. 9B. Therefore, in HSS A1 of FIG. 35B, “within the disaster area (seismic intensity 3)”, “(unknown)”, and “(unknown)” are set in the position information of HSS B2, C1, and C2 (broken line). Similarly, in HSS A2, “outside the disaster area”, “in the disaster area (seismic intensity 3)”, and “(unknown)” are set in the position information of the HSS B1, B2, and C1 (broken line). Similarly, in HSS A3, “within disaster area (seismic intensity 2)” is set in the position information of HSS B3 (broken line). Similarly, in the server X, “outside the disaster area” is set in the position information of the HSS B1 (broken line). Since the server X has transmitted the safety notification withdrawal message in step 644, the notification reception display is changed to “stopped” (broken line). On the other hand, FIG. 35A is similar to FIG. 34A and has no change.

  36A and 36B show the wireless terminals a1 to a3, c1, c2, HSS A1 to A3, C1, C2, A1 to A3, and the organization X of the safety confirmation target person at the times T4 to T5 in the transmission / reception sequence of FIG. 10A. An example of data of server X is shown.

  In FIG. 36A, the power supply of the radio terminals c1 and c2 of the safety confirmation subject is changed to the ON state (broken line). The wireless terminals c1 and c2 of the safety confirmation subject transmitted location registration messages to the respective HSSs C1 and C2 in steps 662 and 666 of FIG. 10A. Accordingly, the relay AP identifiers “AP # c1” and “AP # β” are set in the HSS C1 and C2 in FIG. 36A, respectively (broken line). Further, the HSS C1 and C2 inquire the server 2 about the seismic intensity in Steps 664, 665, etc., and determined that the positions of the wireless terminals c1 and c2 are outside the disaster area and inside the disaster area. Therefore, the position information “outside the disaster area” and “in the disaster area (seismic intensity 5)” are set in the HSS C1 and C2 in FIG. 36A, respectively (broken line).

  Since the wireless terminal b1 refers to the safety information of the other party in HSS B1 in steps 670 to 671 in FIG. 10A, the other party safety reference “execution” is set in the HSS B1 in FIG. 10A (broken line). Further, since the HSS B1 has received the safety notification withdrawal message from the HSS A2 in step 684, the presence / absence of the safety notification participation of the HSS B1 in FIG. 10A is changed to “none” (broken line).

  HSS A1-A3 received the safety notification message from HSS B1-B3, C1, and C2 at steps 682, 688-692. Therefore, in HSS A1 of FIG. 36B, the position information of HSS C1 and C2 is changed to “outside the disaster area” and “in the disaster area (seismic intensity 5)” (broken line). Similarly, in HSS A2 of FIG. 36B, the position information of HSS C1 is changed to “outside the disaster area” (broken line). In addition, since the wireless terminal b1 refers to the other person safety information in steps 670 to 671, in the HSS A2 of FIG. 36B, “Implementation” is set in the other party safety reference of the HSS B1 (broken line).

  Since the HSS A2 has transmitted the safety notification withdrawal message in Step 684, the notification reception display of the HSS B1 is changed to “stopped” (broken line) in the HSS A2 of FIG. 36B.

  37A and 37B are radio terminals a1 to a3, c1 and c2, HSS A1 to A3, C1, C2, A1 to A3 of the safety confirmation subject at times T6 to T7 in the transmission and reception sequences of FIGS. 10B and 10C, and An example of data of server X of organization X is shown.

  Since the wireless terminal b2 registers the evacuation situation in HSS B2 in step 704, the evacuation situation “evacuation complete” is set in HSS B2 in FIG. 37A (broken line). In addition, since the wireless terminal b3 transmits the location registration message to the HSS B3 in Step 706, the relay AP identifier is changed to “AP # b3” in the HSS B3 of FIG. 37A (broken line). In addition, HSS B3 inquires server 2 about the seismic intensity in steps 708 to 709 and determines that the position of wireless terminal b3 is outside the disaster area. Therefore, in HSS B3, the position information is “from within the disaster area (seismic intensity 2)”. It has been changed to “Escape from the disaster area” (dashed line).

  In addition, since the wireless terminal c1 refers to the safety information of the other party in HSS C1 in steps 710 to 711, the other party safety reference “execution” is set in the HSS C1 of FIG. 37A.

  Since HSS B2 has received the safety notification withdrawal message from HSS A2 and A3 in steps 724 to 726, presence / absence of safety notification participation is changed to “none” in HSS B2 in FIG. 37A (broken line). In addition, since the HSS B3 receives the safety notification withdrawal message from the HSS A3 in Step 730, the presence / absence of the safety notification participation is changed to “None” in the HSS B3 of FIG. 37A (broken line). Further, since the HSS C1 has received the safety notification leaving message from the HSS A1 and A2 in steps 734 to 736, the presence / absence of the safety notification participation is changed to “None” in the HSS C1 of FIG. 37A (broken line).

  HSS A1-A3 received the safety notification message from HSS B2, B3, C1, and C2 in steps 722, 728, 732, and 738. Therefore, in HSS A1 of FIG. 37B, the evacuation status of HSS B2 is changed to “evacuation completed”, and the other person's safety reference of HSS C1 is changed to “execution” (broken line). Similarly, in HSS A2, the evacuation status of HSS B2 is changed to “evacuation completed”, and the other person's safety reference of HSS C1 is changed to “execution” (broken line).

  In addition, since the HSS A1 and A2 transmitted the safety notification leaving message to the HSS B2 in steps 724 to 726, the notification reception display of the HSS B2 has been changed to “stopped” in the HSS A1 and A2 of FIG. 37B. (Dashed line). In addition, since the HSS A1 and A2 transmitted the safety notification leaving message to the HSS C1 in steps 734 to 736, the notification reception display of the HSS C1 has been changed to “stopped” in the HSS A1 and A2 of FIG. 37B. (Dashed line).

  Further, since the HSS A3 has received the safety notification message from the HSS B3 in step 728, the location information of the HSS B3 is changed to “escape from the disaster area” in the HSS A3 of FIG. 37B (broken line). Since HSS A3 has transmitted the safety notification withdrawal message to HSS B3 in step 730, the notification reception display of HSS B3 is changed to “stopped” in HSS A3 in FIG. 37B (broken line).

  38A and 38B show the wireless terminals a1 to a3, c1, c2, HSS A1 to A3, C1, C2, A1 to A3, and the organization X of the safety confirmation subject at times T8 to T9 in the transmission / reception sequence of FIG. 10D. An example of data of server X is shown.

  In step 748, since the wireless terminal c2 transmits a location registration message to the HSS C2, the relay AP identifier is changed to “AP # γ” (broken line) in the HSS C2 of FIG. 38A. Also, the HSS C2 receives the location registration message of the wireless terminal c2, inquires the server 2 for the seismic intensity in steps 750 to 751, and the location information of the wireless terminal c2 is changed to “move within the disaster area (seismic intensity 3)”. (Dashed line).

  In step 762, HSS A1 received the safety notification message from HSS C2. Therefore, in HSS A1 in FIG. 38B, the position information of HSS C2 is changed to “move within the affected area (seismic intensity 3)” (broken line). In HSS A3 of FIG. 38B, the other party's safety reference of HSS B3 is changed to “Implementation” by the subsequent reception of the safety message from HSS B3 (broken line).

  As described above, according to the embodiment, the safety notification participation message from the safety confirmation person's HSS 11 to 13 to the safety confirmation object person's HSS 14 to 19 is transmitted to the network 5 by multicast. In addition, safety notification messages from the safety confirmation target HSSs 14 to 19 to the safety confirmation person HSSs 11 to 13 are transmitted to the safety notification group by multicast. Therefore, the HSSs 11 to 13 do not repeatedly connect to the HSSs 14 to 19 because the connection to the HSSs 14 to 19 fails. In addition, since the safety notification participation message is distributed and transmitted to the plurality of HSSs 14 to 19 and each safety notification message is transmitted from the plurality of HSSs 14 to 19, it is possible to prevent the connection from being concentrated on a specific HSS. . Therefore, an increase in traffic on the network 5 due to concentration of connections and retries can be suppressed, and congestion of the network 5 can be suppressed.

  All examples and conditional expressions given here are intended to help the reader understand the inventions and concepts that have contributed to the promotion of technology, such examples and It is understood that the present invention is not limited to the conditions, and that the organization of such examples in the specification is not related to the superiority or inferiority of the present invention. Although embodiments of the present invention have been described in detail, it will be understood that various changes, substitutions and variations can be made thereto without departing from the spirit and scope of the invention.

Regarding the embodiment including the above examples, the following additional notes are further disclosed.
(Supplementary note 1) In response to the location registration signal from the wireless terminal after receiving the disaster information, the safety information of the wireless terminal including the location information of the wireless terminal related to the disaster is generated, and the safety information is addressed to the multicast group A first information processing apparatus that transmits by multicast;
In response to receiving the disaster information, a second information processing apparatus that transmits a participation signal for multicast distribution based on an address of the first information processing apparatus;
A communication system including:
(Supplementary note 2) The second information processing apparatus receives and stores the safety information, and transmits the safety information to the other terminal in response to a request from another terminal. The communication system according to Supplementary Note 1.
(Supplementary note 3) The communication system according to Supplementary note 1 or 2, wherein the location information includes information indicating whether or not the location of the wireless terminal is located in a disaster area.
(Supplementary Note 4) The first information processing apparatus receives, from another apparatus, the magnitude of a disaster at a measurement position in the vicinity of a wireless base station that relays communication with the wireless terminal, and performs the disaster for each area. The communication system according to appendix 3, wherein the affected area is determined according to the size of the disaster.
(Supplementary note 5) The communication system according to any one of supplementary notes 1 to 4, wherein the safety information includes evacuation information received from the wireless terminal.
(Supplementary note 6) The communication according to any one of supplementary notes 1 to 5, wherein the safety information includes presence / absence of access to another safety information in the first information processing apparatus by the wireless terminal. system.
(Supplementary note 7) In the safety information received, the second information processing apparatus indicates that the position of the wireless terminal is located outside the disaster-stricken area, and arbitrarily accesses another safety information by the wireless terminal. Any one of appendices 1 to 6, characterized in that when the evacuation information is indicated, or when the input evacuation information exists, a departure signal from the multicast distribution is transmitted. The communication system described.
(Appendix 8) The computer
In response to receiving disaster information, a participation signal for multicast distribution based on the address of another information processing apparatus is transmitted, and the wireless terminal related to the disaster in response to a location registration signal from the wireless terminal after receiving the disaster information A communication method for generating the safety information of the wireless terminal including the location information of the wireless terminal and performing a process of transmitting the safety information to the multicast group by multicast.
(Supplementary note 9) The first information processing apparatus generates safety information of the wireless terminal including the positional information of the wireless terminal related to the disaster in response to the position registration signal from the wireless terminal after receiving the disaster information, Send safety information to the multicast group by multicast,
A communication method in which a second information processing apparatus executes a process of transmitting a participation signal for multicast distribution based on an address of the first information processing apparatus in response to reception of the disaster information.

DESCRIPTION OF SYMBOLS 1 Communication system 7 Disaster area 5 Network 2 Disaster alarm server 26, 28 Router 11-19 Home subscriber server (HSS)
21 server for organization 31-40 wireless base station 51-59 wireless terminal 60 terminal device

Claims (6)

In response to the location registration signal from the wireless terminal after receiving the disaster information, the safety information of the wireless terminal including the location information of the wireless terminal related to the disaster is generated, and the safety information is transmitted to the multicast group by multicast. A first information processing apparatus;
In response to receiving the disaster information, a second information processing apparatus that transmits a participation signal for multicast distribution based on an address of the first information processing apparatus;
A communication system including:   The second information processing apparatus receives and stores the safety information, and transmits the safety information to the another terminal in response to a request from another terminal. Item 12. The communication system according to Item 1.   The communication system according to claim 1, wherein the position information includes information indicating whether a position of the wireless terminal is located in a disaster area.   The first information processing apparatus receives, from another device, the magnitude of the disaster at a measurement position in the vicinity of the radio base station that relays communication with the radio terminal, and sets the magnitude of the disaster for each area. 4. The communication system according to claim 3, wherein the affected area is determined accordingly.   The communication system according to any one of claims 1 to 4, wherein the safety information includes presence / absence of access to another safety information in the first information processing apparatus by the wireless terminal. Computer
In response to receiving disaster information, send a participation signal for multicast distribution based on the address of another information processing device,
In response to the location registration signal from the wireless terminal after receiving the disaster information, the safety information of the wireless terminal including the location information of the wireless terminal related to the disaster is generated, and the safety information is transmitted to the multicast group by multicast. A communication method for executing a process to execute.

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