JP6245054B2 - Network system and wireless connection device - Google Patents

Description

  The present invention relates to wireless connections.

  When a disaster such as an earthquake occurs, family members and acquaintances are separated, making it difficult to confirm each other's safety. It is common to confirm the safety of family members and acquaintances using disaster message boards, emails, and telephones, but there is a problem that it is difficult to contact because the mobile phone communication network is very congested. Therefore, a technique has been proposed in which a wireless router installed in a user's home is operated as a public wireless LAN access point in a disaster (see, for example, Patent Document 1). In addition, a wireless router that transmits user safety information and location information to a mail server during a disaster has been proposed (see, for example, Patent Document 2).

JP 2013-106236 A JP 2013-120462 A

  In the technique described in Patent Document 2, the wireless router inquires of the mobile terminal whether notification is necessary, and transmits the safety information and location information of the user to the mail server only when a response is received from the mobile terminal. . That is, when the communication network is congested and communication cannot be established or when there is no response, safety information and location information cannot be obtained. Therefore, a technique that can confirm safety even when communication cannot be established or when there is no response has been desired. In addition, downsizing of the apparatus, cost reduction, resource saving, ease of manufacture, improvement in usability, and the like have been desired.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms.

(1) According to an aspect of the present invention, a network system including a wireless connection device and a management server is provided. In this network system, the wireless connection device establishes a wireless connection with an unspecified communication terminal and establishes a public wireless LAN in the event of a disaster when a specific event occurs, and the disaster Sometimes, an information management unit that generates communication terminal information related to a first communication terminal located in a range that can be connected to the wireless connection device, and management server communication that transmits the communication terminal information to the management server at the time of the disaster A disaster management communication terminal information including location information regarding the position of the first communication terminal based on the communication terminal information received from the wireless connection device at the time of the disaster. You may provide the disaster communication terminal information generation part to produce | generate.

  Here, at the time of a disaster that is the occurrence of a specific event, for example, a concept including a disaster such as a natural disaster or a human disaster, an emergency, a war outbreak, a request from the police or the government, a test thereof, etc. It is. Note that the management server communication control unit may transmit the communication terminal information to the management server only during a disaster.

  According to this network system, an unspecified communication terminal can be wirelessly connected to the wireless connection device at the time of a disaster, and the congestion state of the communication network in the disaster area can be alleviated. Since the wireless connection device acquires communication terminal information related to communication terminals within a range in which wireless connection with the wireless connection device is possible and transmits it to the management server, the communication terminal information is collected by the management server. Therefore, by referring to the communication terminal information collected in the management server, even when communication cannot be established or when the communication terminal does not respond, it is possible to contribute to the safety confirmation and location confirmation of the disaster victim.

(2) In the network system according to the above aspect, when the management server receives first inquiry information related to the disaster communication terminal information from the second communication terminal connected to the management server at the time of the disaster, Based on the first inquiry information, route information including information on the position of the first communication terminal is generated from the disaster communication terminal information of the first communication terminal, and the second communication terminal You may provide the inquiry process part which transmits. In this way, route information can be provided in response to an inquiry from the second communication terminal.

(3) In the network system according to the above aspect, the management server includes a plurality of wireless connection devices, and the management server moves the first communication terminal based on the communication terminal information received from the plurality of wireless connection devices. The route information including information on the information may be generated. In this way, for example, when a disaster victim who is a user of the communication terminal moves, the communication terminal information is transmitted from the plurality of wireless connection devices to the management server, and the route information is generated. Therefore, by providing route information from the management server, it is possible to contribute to the identification of the travel route of the disaster victim.

(4) In the network system according to the above aspect, in the wireless connection device, the information management unit may generate the communication terminal information based on a probe request transmitted from the first communication terminal. Since the probe request is automatically transmitted from the communication terminal regardless of the operation of the user of the communication terminal, this way, for example, even when the victim cannot operate the communication terminal due to serious injury, unconsciousness, etc. It can contribute to confirmation of safety and whereabouts.

(5) In the network system according to the above aspect, the management server includes at least one identification information of the first communication terminal and at least one identification information of the second communication terminal before the disaster occurs. A storage unit storing associated group information, wherein the inquiry processing unit is configured to perform the first communication associated with the second communication terminal that has transmitted the first inquiry information based on the group information. A terminal may be extracted, and the route information regarding at least one of the extracted first communication terminals may be transmitted to the second communication terminal. In this way, even when the inquirer does not know the device identification information of the communication terminal to be queried, the route information of the communication terminal registered in the group can be acquired.

(6) In the network system of the above aspect, the wireless connection device includes a congestion degree information generation unit that generates congestion degree information including the congestion degree of the wireless connection device and position information regarding the position of the wireless connection device. The management server communication control unit may transmit the congestion degree information to the management server. In this way, the congestion degree information of the wireless connection device is collected in the management server.

(7) In the network system of the above aspect, the management server displays the location of the wireless connection device and the congestion level on a map based on the congestion degree information received from at least one of the wireless connection devices. A congestion degree map information generation unit that generates congestion degree map information to be displayed, and the inquiry processing unit receives second inquiry information related to the congestion degree map information from the second communication terminal; The congestion degree map information may be transmitted to the second communication terminal. In this way, the degree of congestion of the wireless connection device can be displayed on the map, which improves user convenience.

(8) According to another aspect of the present invention, a wireless connection device is provided. The wireless connection device includes a public wireless LAN providing unit that establishes a wireless connection with an unspecified communication terminal and establishes a public wireless LAN at the time of a disaster that is a specific event, and the wireless connection at the time of the disaster. The communication terminal information is transmitted only to the information management unit that generates communication terminal information related to the first communication terminal located in a range that can be connected to the device, and the management server connected to the wireless connection device, at the time of the disaster. A management server communication control unit. According to this wireless connection device, since a public wireless LAN is provided in the event of a disaster, congestion of the communication network during the disaster is alleviated. And since the communication terminal information of the communication terminal which can be wirelessly connected to itself is transmitted to the management server, it can contribute to the safety and location confirmation of the victim via the communication terminal information.

(9) In the wireless connection device of the above aspect, the information management unit may generate the communication terminal information based on a probe request transmitted from the first communication terminal. In this way, communication terminal information can be generated regardless of the operation of the user of the communication terminal.

(10) In the wireless connection device of the above aspect, the management server communication control unit includes a congestion degree information generation unit that generates congestion degree information including information on a congestion degree of the wireless connection device and a position of the wireless connection device. May transmit the congestion degree information to the management server. In this way, the congestion degree information of the wireless connection device can be collected in the management server.

  A plurality of constituent elements of each embodiment of the present invention described above are not essential, and some or all of the effects described in the present specification are to be solved to solve part or all of the above-described problems. In order to achieve the above, it is possible to appropriately change, delete, replace with a new component, and partially delete the limited contents of some of the plurality of components. In order to solve some or all of the above-described problems or achieve some or all of the effects described in this specification, technical features included in one embodiment of the present invention described above. A part or all of the technical features included in the other aspects of the present invention described above may be combined to form an independent form of the present invention.

  The present invention can also be realized in various forms other than a network system and a wireless connection device. For example, a management server, a method for controlling a wireless connection device, a method for controlling a management server, a computer program that realizes part or all of these methods, a non-temporary recording medium that records the computer program, and the like Can be realized.

It is explanatory drawing which shows schematic structure of the network system as one Embodiment of this invention. It is a block diagram which shows the structure of an access point functionally. It is a block diagram which shows the structure of a management server functionally. It is a figure which shows the structure of trace log information. It is a figure which shows the structure of group information. It is a sequence diagram which shows an example of the process at the time of a disaster in the network system of embodiment. It is a flowchart which shows the flow of preparation of the trace log information in a management server. It is a flowchart which shows the flow of the creation process of the congestion degree information in an access point. It is a figure which shows the congestion degree map information displayed on the display screen of a communication terminal.

A. Embodiment:
A-1. System outline:
FIG. 1 is an explanatory diagram showing a schematic configuration of a network system as an embodiment of the present invention. The network system 100 includes access points 21, 22, and 23 as wireless connection devices and a management server 30. In FIG. 1, illustration of other network relay devices, lines, terminals, and the like not used in the following description is omitted. Hereinafter, when the access points 21, 22, and 23 are not distinguished, they are referred to as access points 20. The network system 100 is a system that enables confirmation of the location of a communication terminal when a disaster occurs. In the present embodiment, disaster is a concept including natural disasters such as earthquakes and tsunamis and human disasters such as fires.

  FIG. 1 illustrates a situation when a disaster occurs. The access point 20 is connected to the Internet INT via a wired cable, and is connected to the management server 30 via the Internet INT. As will be described in detail later, the access point 20 has a function of opening as a public wireless LAN access point in the event of a disaster.

  The access points 21, 22, and 23 are installed in the evacuation shelters 1, 2, and 3 designated at the time of the disaster, respectively. Each evacuation center accommodates a plurality of victims, and there are a plurality of communication terminals 41 to 44 owned by each victim. Hereinafter, when the communication terminals 41 to 44 are not distinguished, they are referred to as communication terminals 40. The communication terminal 40 is a mobile communication terminal having a wireless LAN connection function such as a smartphone or a tablet.

  FIG. 1 illustrates the following case in order to explain the operation of the network system 100 according to the present embodiment at the time of a disaster. When a disaster occurs, the user X is accommodated in the evacuation site 1, the user Y is accommodated in the evacuation site 2, and the user Z is accommodated in the evacuation site 3, and their safety is unknown. Users X, Y, and Z have communication terminals 41, 42, and 43, respectively. Other communication terminals existing at each shelter are described as communication terminals 44 in order to distinguish them from these communication terminals. As the users X, Y, and Z, for example, a father, mother, and daughter that constitute a family can be assumed.

A-2. Overview of access point configuration:
FIG. 2 is a block diagram functionally showing the configuration of the access point 20. The access point 20 includes a CPU 210, a RAM 230, a wireless communication interface 240, a wired communication interface 250, and a flash ROM 220. These components are connected to each other by a bus.

  The CPU 210 controls the access point 20 by developing and executing a program stored in the flash ROM 220 on the RAM 230. Further, the CPU 210 implements the functions of the management server communication control unit 211, the public wireless LAN providing unit 212, and the information management unit 214.

  The public wireless LAN provider 212 includes a disaster mode 213 that opens the access point 20 as a public wireless LAN access point in the event of a disaster. When the public wireless LAN providing unit 212 detects the occurrence of a disaster, the public wireless LAN providing unit 212 activates the disaster mode 213. When the disaster mode 213 is activated, the access point 20 is enabled for the access point function based on the disaster SSID, and beacon transmission using the disaster SSID is started. When the communication terminal 40 detects the disaster SSID of the access point 20, the communication terminal 40 transmits a connection request to the SSID, and a wireless LAN connection is established based on an acknowledgment from the access point 20. In this case, password authentication is not required when the communication terminal 40 uses a public wireless LAN. The communication is not encrypted or is encrypted using a public encryption key or the like. In the present embodiment, the disaster SSID is known in advance, but is not limited thereto. For example, when the access point 20 receives a notification of the occurrence of a disaster, the public wireless LAN providing unit 212 may notify the surrounding communication terminals of the activation state by beacon transmission using the disaster SSID. In this case, the user of the communication terminal 40 can know the disaster SSID through the wireless connection setting screen to the access point 20 of his / her communication terminal 40 after the disaster occurs.

  The public wireless LAN providing unit 212 is itself formed in normal time using VPN (Virtual Private Network), VLAN (Virtual Local Area Network), PPPoE (Point to Point Protocol over Ethernet) (Ethernet is a registered trademark), etc. The information in the LAN is kept secret. Here, normal time means a state in which no disaster that causes a large-scale communication failure has occurred.

  When the disaster has converged, the public wireless LAN providing unit 212 ends the disaster mode and closes the public wireless LAN. In the present embodiment, the access point 20 detects the occurrence and convergence of a disaster by push notification from an Internet service provider, but the detection of the occurrence and convergence of a disaster is not limited to this embodiment. For example, the management server 30 may notify the access point 20 or may detect using a disaster message board installed by a telecommunications carrier.

  The public wireless LAN providing unit 212 receives a probe request (Probe Request), a connection request (Association Request), and a disconnection request (Dissociation Request) transmitted from the communication terminal 40 within a range that can be wirelessly connected to the access point 20 in the event of a disaster. Etc.

  When the disaster mode is activated at the access point 20, the information management unit 214 generates communication terminal information 224 related to the communication terminal 40 located in a range where the access point 20 can be wirelessly connected and stores the communication terminal information 224 in the flash ROM 220. The communication terminal information 224 includes connection time, disconnection time, duration time, device identification information, authentication information (SSID), probe request reception time, and the like. The information management unit 214 receives a request such as a probe request (Probe Request), a connection request (Association Request), or a disconnection request (Disassociation Request) received by the public wireless LAN providing unit 212, and a connection (Association) or a disconnection (Dissociation). ) To generate communication terminal information.

  The communication terminal information 224 is generated based on the request or the like. Therefore, if it is within a range that can be wirelessly connected to the access point 20 (range in which radio waves can be received), not only the communication terminal 40 connected to the access point 20 but also the communication terminal 40 that is not connected to the communication terminal information. 224 is generated. Therefore, even when the access point 20 is congested and cannot be connected, or even when the user of the communication terminal 40 is in an inoperable state (for example, injury, unconsciousness, etc.), information regarding the communication terminal 40 can be generated. it can.

  In addition, the information management unit 214 generates congestion degree information 223 related to the congestion degree of the access point 20 and stores it in the flash ROM 220 at the time of a disaster. The generation of the congestion degree information will be described in detail later.

  The management server communication control unit 211 controls communication with the management server 30 via the Internet INT. While the access point 20 is in the disaster mode, the AP information 221 and the communication terminal information 224 stored in the flash ROM 220 are associated with each other and periodically transmitted to the management server 30.

  The wireless communication interface 240 includes a transmission / reception circuit, and performs demodulation and generation of radio waves received via the antenna, and generation and modulation of radio waves transmitted via the antenna. The wired communication interface 250 is connected to a line on the Internet INT (FIG. 1) side. The wired communication interface 150 includes a PHY / MAC controller, adjusts the waveform of the received signal, and extracts a MAC frame from the received signal.

  The flash ROM 220 stores AP information 221 and communication terminal information 224. The AP information 221 includes position information 222 and congestion degree information 223. The position information 222 is information indicating a place where the access point 20 is installed, and includes the name of the place (for example, XX park, XX gymnasium, refuge 1, refuge 2, etc.) and an address. The location information 222 may be generated based on information obtained by a GPS (Global Positioning System) function included in the access point 20 or may be input by the installer of the access point 20. The congestion level information 223 is information indicating the congestion level of the access point 20 and is generated by the information management unit.

A-3. General configuration of the management server:
FIG. 3 is a block diagram functionally showing the configuration of the management server 30. The management server 30 includes a CPU 310, a RAM 330, a wired communication interface 350, and a hard disk 320 as a storage unit. These components are connected to each other by a bus. The storage unit is not limited to a hard disk, and a storage device (SSD) including a storage medium, a nonvolatile memory, a nonvolatile memory, or the like may be used.

  The CPU 310 controls the management server 30 by executing a program stored in the hard disk 320. In addition, the CPU 310 realizes the functions of an inquiry processing unit 311, a public wireless LAN communication control unit 312, and a congestion degree map information generation unit 314.

  The public wireless LAN communication control unit 312 controls communication with the access point 20 via the Internet INT. The public wireless LAN communication control unit 312 includes a disaster communication terminal information generation unit 313. The disaster communication terminal information generation unit 313 analyzes the AP information 221 and the communication terminal information 224 received from the plurality of access points 20, extracts only information that may be disclosed, and generates the disaster communication terminal information 327. Then, it is converted into a database and stored in the hard disk 320. Since the information transmitted from the plurality of access points 20 has the same content, the format is different. Therefore, the information is analyzed and unified to generate the disaster communication terminal information 327.

  The disaster communication terminal information 327 includes communication terminal information 322, trace log information 324, and AP information 325. Communication terminal information 322 includes communication terminal information 224 received from a plurality of access points 20. The AP information 325 includes AP information 221 received from a plurality of access points 20. Communication terminal information 322 and AP information 325 are stored in association with each other. The trace log information 324 is information indicating the positions and connection states of the plurality of communication terminals 40, and is generated based on the communication terminal information 322 and the AP information 325.

  FIG. 4 is a diagram showing the configuration of the trace log information. The trace log information includes LogID, time, device identification information, connection status, APID, and installation location. The time is a time related to a connection state to be described later. For example, the time when the communication terminal 40 is connected to the access point 20, the time when the access point 20 receives the probe request, and the communication terminal 40 and the access point 20 are disconnected. Time etc. The time is written together with the date (in FIG. 4, the date is shown as YYYY / MM / DD). In this embodiment, the device identification information is the MAC address of the communication terminal 40. The connection state indicates a connection state between the access point 20 and the communication terminal 40. "Connecting" is the state where the connection has been continued from the previous time, "Connected" is the state other than "Connected" and "Connecting" the previous time, changed to "Connected", "Indicates that the target communication terminal 40 is not connected to the access point 20 but a probe request or a connection request from the target communication terminal 40 is received by the access point 20. The APID is identification information for identifying each access point 20, and for example, a MAC address can be used. 4 illustrates the access points 21, 22, and 23 shown in FIG. 1, and the reference numerals used in FIG. 1 are used as APIDs. The installation location indicates a location where the access point 20 is installed. In this embodiment, the access point 21 is installed in a school (evacuation site 1), the access point 22 is installed in a xx park (evacuation site 2), and the access point 23 is installed in a Δ △ gymnasium (evacuation site 3). Is the installation location. The trace log information is a database that is referred to when generating path information to be described later.

  Based on the AP information stored in the hard disk 320, the congestion level map information generation unit 314 displays the congestion levels of the plurality of access points 20 connected to the management server 30 via the Internet INT on the map. For this purpose, congestion degree map information 326 is generated and stored in the hard disk 320.

  The inquiry processing unit 311 has a database search function, receives an inquiry from the communication terminal 40 connected to the management server 30, searches the hard disk 320 for information corresponding to the inquiry, and sends it to the inquiry source communication terminal 40. Send. For example, when an inquiry about the congestion degree of the access point 20 is received at the time of a disaster, the congestion degree map information 326 is extracted from the hard disk 320 and transmitted. When the inquiry about the route information of the specific communication terminal 40 is received, the information of the corresponding communication terminal 40 is extracted from the trace log information 324 of the hard disk 320, and the route information 328 is created and transmitted. The path information 328 may be temporarily stored in the hard disk 320 and deleted after transmission is completed.

  The hard disk 320 stores a database 321, congestion degree map information 326, and route information 328. The database 321 includes group information 323 and disaster communication terminal information 327.

  FIG. 5 is a diagram illustrating a configuration of group information. The group information 323 stores device identification information of a plurality of communication terminals 40 constituting the group in association with each other. The group may be a group registered in advance, such as a classmate, a company employee, or the like in addition to the family. In FIG. 5, the users X, Y, and Z shown in FIG. Device identification information of the communication terminal 41 owned by the user X = A, device identification information of the communication terminal 42 owned by the user Y = B, and device identification information of the communication terminal 43 owned by the user Z = C. In the present embodiment, the group information 323 is registered by the user before a disaster occurs. The registration method of the group information 323 is not limited to this embodiment. For example, the management server 30 may be connected to the home gateway, and device identification information of communication terminals in the home connected to the home gateway may be grouped and transmitted to the management server 30 during normal times. The application for group information registration may be automatically downloaded to each communication terminal 40, and the user of each communication terminal may register group information according to the display screen. In the present embodiment, the MAC address is used as the device identification information. For example, the communication terminal 40 such as a mail address and UDID (Unique Device IDentifier) can be identified and can be acquired by the access point 20. Can be used.

  The wired communication interface 350 is connected to a line on the Internet INT (FIG. 1) side. The wired communication interface 350 includes a PHY / MAC controller and adjusts the waveform of the received signal, and extracts a MAC frame from the received signal.

A-4. Processing in the event of a disaster in the network system:
Next, an outline of processing at the time of a disaster in the network system of the present embodiment will be described with an example. FIG. 6 is a sequence diagram illustrating an example of a disaster process in the network system according to the embodiment. 6 illustrates a process performed between the communication terminal 41, the access point 21, the communication terminal 42, the access point 22, and the management server 30 illustrated in FIG. 1 in the network system of the present embodiment. In FIG. 6, the user of the communication terminal 41 is simply displayed as “X” and the user of the communication terminal 42 is simply displayed as “Y” for the sake of space. Similar processing is performed with other communication terminals 40, access point 20, and management server 30 that are not shown in FIG.

  When a disaster occurs, the occurrence of the disaster is notified to the access points 21 and 22 by push notification by the Internet service provider (ISP) (steps S102 and S104). When receiving the notification of the occurrence of a disaster, the public wireless LAN providing unit 212 of the access points 21 and 22 activates the disaster mode and opens the access points 21 and 22 as public wireless LAN access points (steps S106 and S108). .

  When the communication terminal 41 owned by the user X is wirelessly connected to the access point 21 (step S110), the information management unit 214 of the access point 21 creates the communication terminal information 224. At the time of periodic notification from the access point 21 to the management server 30, the management server communication control unit 211 of the access point 21 transmits the communication terminal information 224 related to the communication terminal 41 together with the AP information 221 related to the access point 21 to the management server 30. (Step S112).

  On the other hand, when the communication terminal 42 owned by the user Y is wirelessly connected to the access point 22 (step S114), the information management unit 214 of the access point 22 creates the communication terminal information 224. At the time of periodic notification from the access point 22 to the management server 30, the management server communication control unit 211 of the access point 22 transmits the communication terminal information 224 related to the communication terminal 42 to the management server 30 together with the AP information 221 (step S116). .

  When an inquiry about information about the communication terminal 42 is transmitted from the communication terminal 41 owned by the user X to the management server 30 (step S118), the inquiry processing unit 311 of the management server 30 receives the information received at step S116. The trace log information 324 generated based on the included information is searched, route information 328 relating to the communication terminal 42 is created, and transmitted to the communication terminal 41 (step S120).

  When the communication terminal 41 disconnects the wireless connection with the access point 21 (step S122), the information management unit 214 of the access point 21 creates the communication terminal information 224. At the time of periodic notification from the access point 21 to the management server 30, the management server communication control unit 211 of the access point 21 manages the communication terminal information 224 including that the radio has been disconnected together with the AP information 221 regarding the access point 21. Send to server 30. In step S122, for example, the communication terminal 41 includes a case where the wireless connection with the access point 21 is disconnected by an operation of the user X, or a case where the communication terminal 41 is automatically disconnected depending on a reception state of radio waves.

  When the communication terminal 41 is moved to a place where the radio wave from the access point 22 can be received (evacuation shelter 2: xx park) and the communication terminal 41 is wirelessly connected to the access point 22 (step S126), the access point 22 The information management unit 214 creates the communication terminal information 224. At the time of periodic notification from the access point 22 to the management server 30, the management server communication control unit 211 of the access point 22 transmits the communication terminal information 224 regarding the communication terminal 41 together with the AP information 221 regarding the access point 22 to the management server 30. (Step S128).

  Thus, according to the network system of the present embodiment, when a disaster occurs, the access point 20 is opened as a public wireless LAN, and an unspecified communication terminal 40 in the vicinity of the access point 20 Wireless connection to the LAN access point 20 is possible.

  When the communication terminal 40 is connected to the access point 20 at the time of a disaster, communication terminal information 224 related to the communication terminal 40 is generated and transmitted to the management server 30. Therefore, as described above, when the user X is in the evacuation site 1 and the user Y is in the evacuation site 2, the communication terminal information 224 related to the communication terminals 40 owned by the user X is collected in the management server 30. Makes an inquiry to the management server about the communication terminal 42 owned by the user Y, so that the position of the communication terminal 42, that is, the location of the user Y can be specified.

  As described above, for example, when the user X moves from the evacuation shelter 1 to the evacuation shelter 2, the communication terminal information 224 related to the communication terminal 41 is transmitted from the access point 22 installed in the evacuation shelter 2 to the management server 30. Sent to. Since the management server 30 includes both the communication terminal information 224 related to the communication terminal 41 received from the access point 21 and the communication terminal information 224 related to the communication terminal 41 received from the access point 22, the management terminal 30 determines the communication terminal Route information 328 relating to 41 movement routes can be generated. Therefore, for example, the user Z in the refuge 3 inquires of the management server 30 about the communication terminal 41 owned by the user X, and acquires the route information 328 of the communication terminal 41, thereby specifying the movement route of the user X. be able to.

  Although FIG. 6 illustrates the case where the communication terminal 40 is connected to the access point 20, as described above, the communication terminal 40 can be connected to the access point 20 without being connected to the access point 20. If the access point 20 receives a probe request or the like from the communication terminal 40, the communication terminal information 224 is created, and the communication terminal information 224 is transmitted to the management server 30 during regular notification to the management server 30.

  In this embodiment, the access point 20 transmits the communication terminal information 224 to the management server 30 at the time of periodic notification to the management server 30. For example, the connection and disconnection of the communication terminal 40 with the access point 20 is performed. You may transmit to the management server 30 as a trigger.

A-5. Creating route information on the management server:
Creation of route information transmitted from the management server 30 to the communication terminal 40 will be described below with reference to FIGS. Here, the creation of route information in the management server 30 will be described by taking as an example the case where the management server 30 receives an inquiry about the route information of the communication terminals 41 and 43 shown in FIG. 1 from the communication terminal 42. In the example illustrated in FIG. 4, the user X who is the user of the communication terminal 41 (device identification information: A) has not moved from the evacuation site 1 (the access point 21 is installed). A user Y who is a user of the communication terminal 42 (device identification information: B) has moved from the refuge 2 (where the access point 22 is installed) to the refuge 1. A user Z who is a user of the communication terminal 43 (device identification information: C) has moved from the evacuation site 3 (where the access point 23 is installed) to the evacuation site 1.

  The management server 30 receives the communication terminal information 224 related to the communication terminals 41, 42 and 43 from the access point 21, receives the communication terminal information 224 related to the communication terminal 42 from the access point 22, and receives the communication terminal information 224 from the access point 23. 43 is received, and trace log information 324 (FIG. 4) is created based on the communication terminal information 224.

  After the trace log information 324 shown in FIG. 4 is created, when the user Y uses the communication terminal 42 to query the management server 30 about the route information of the communication terminal 41 owned by the user X, the management server 30 The inquiry processing unit 311 searches the trace log information 324 stored in the hard disk 320 and extracts information related to the communication terminal 41. The extracted information is LogID = 1,4. The inquiry processing unit 311 creates route information 328 related to the communication terminal 41 based on the extracted information, and transmits the route information 328 to the communication terminal 42. The route information 328 may include only position information at the time nearest to the time when the inquiry is received, or may include position information at all the extracted times. Further, it may include connection state information. The route information 328 is displayed on the display screen of the communication terminal 42, for example, “Communication terminal 41 is at XX school”, “Communication terminal 41 is at 11:00 XX school, 11:20 XX school. “The communication terminal 41 is connected to the 11:00 OO school AP and is currently connected to the 11:20 OO school AP”. The user Y who is the user of the communication terminal 42 receives the route information regarding the communication terminal 41 from the management server 30, so that the user X is highly likely to have evacuated to the school (evacuation center 1). I can know.

  Next, when the user Y uses the communication terminal 42 to inquire the management server 30 about the route information of the communication terminal 43 owned by the user Z, the inquiry processing unit 311 of the management server 30 is stored in the hard disk 320. The trace log information 324 is retrieved to extract information related to the communication terminal 43. The extracted information is LogID = 3,5. The inquiry processing unit 311 creates route information 328 related to the communication terminal 43 based on the extracted information, and transmits the route information 328 to the communication terminal 42. Similarly to the above, the route information 328 is displayed on the display screen of the communication terminal 42, for example, “The communication terminal 43 is at XX school.”, “The communication terminal 43 is 11:10 ΔΔ gymnasium, 11:20. “I was in the school.”, “The communication terminal 43 is connected to the AP of the gymnasium 11:10, Δ: 11:20, and it is in the vicinity of the AP of the school.” Is displayed. The user Y who is the user of the communication terminal 42 can know that the user Z is likely to have evacuated to the school by receiving the route information 328 regarding the communication terminal 43 from the management server 30. . By including a plurality of pieces of position information in the route information 328, it is possible to confirm the movement route when the evacuation site is moved like the user Z in this example. For example, when it is confirmed that there is a communication terminal 43 but there is no user Z at the last moving place of XX school, based on the possibility of being between XX school and △△ gymnasium, You can search.

  In the above example, the user Y recognizes the device identification information (MAC address in this embodiment) of the communication terminals 41 and 43 owned by the users X and Z in advance, and uses the device identification information of the communication terminals 41 and 43. In this way, the management server 30 is inquired about route information. However, a case where the device identification information of the communication terminal 40 is not recognized is also assumed. In the network system 100 of the present embodiment, the device identification information of the communication terminals 41, 42, and 43 owned by the above-mentioned family is registered in advance in the management server 30 as group information 322. Hereinafter, generation of group route information in the management server 30 will be described with reference to FIGS.

  When the user Y makes an inquiry about route information to the management server 30 using the communication terminal 42 owned by the user Y, the inquiry processing unit 311 of the management server 30 identifies the device of the communication terminal 42 included in the received inquiry information. Information: B is acquired. The inquiry processing unit 311 refers to the group information 323 stored in the hard disk 320 and extracts group information of a group (group ID = 1) including the device identification information: B. Group 1 includes device identification information of communication terminal 41 = A, device identification information of communication terminal 42 = B, and device identification information of communication terminal 43 = C. The inquiry processing unit 311 searches the trace log information 324 stored in the hard disk 320 based on the device identification information included in the group information, and extracts information corresponding to the device identification information = A and C. The extracted information is LogID = 1, 3, 4, and 5. The inquiry processing unit 311 creates group route information regarding the communication terminals 41 and 43 based on the extracted information, and transmits the group route information to the communication terminal 42.

  In this way, even if the user Y does not know the device identification information of the communication terminals 41 and 43 of the users X and Z, the route information regarding the communication terminals 41 and 43 owned by the users X and Z can be acquired. . In addition, by registering the device identification information and the owner information in association with each other in the group information, for example, “The communication terminal 41 of the user X is in the school” is displayed on the display screen of the communication terminal 42. The communication terminal 43 of the user Z is at XX school "or the like can be displayed.

  In the present embodiment, the route information 328 is information representing a screen to be displayed on the communication terminal 42, but is not limited thereto. For example, the management server 30 transmits information extracted from the trace log information 324 to the communication terminal 42 as the route information 328, and the communication terminal 42 generates and displays information representing a screen to be displayed on the display screen. Also good.

A-6. Creating trace log information on the management server:
Next, the trace log information (FIG. 4) used for creating the above-described route information 328 will be described. FIG. 7 is a flowchart showing a flow of creating trace log information in the management server. The disaster communication terminal information generation unit 313 of the management server 30 shifts from the idle state (step S302) to step S304, and the public wireless LAN communication control unit 312 notifies the access point 20 (AP information 221 and communication terminal information 224). ) Is received. Here, the notification from the access point 20 may be a regular notification or a notification triggered by connection or disconnection. If it is determined in step S304 that the notification from the access point 20 has been received, the disaster communication terminal information generation unit 313 acquires the AP information 221 and updates the AP information 325 stored in the hard disk 320 (step S306). ).

  Thereafter, the disaster communication terminal information generation unit 313 acquires the communication terminal information 224, updates the communication terminal information 322 stored in the hard disk 320 (step S308), and the updated AP information 325 and communication terminal information. Based on 322, the trace log information 324 is updated (step S310).

A-7. Creating access point congestion information:
Prior to the description of the creation process of the congestion degree map information 326 in the management server 30, the creation process of the congestion degree information 223 in the access point 20 will be described. FIG. 8 is a flowchart showing a flow of processing for creating congestion degree information at an access point. When the disaster mode is activated, the information management unit 214 of the access point 20 empties the connected device list 226 (FIG. 2) and the surrounding device list 227 (FIG. 2), and sets the measurement start time to the current time. (Step S202), and shifts to the idle state (step S204).

  The information management unit 214 determines whether or not the public wireless LAN providing unit 212 has received a Dissociation Request or Deauthentication Request (hereinafter referred to as “disconnection request”) from the communication terminal 40 (step S206). If it is determined in step S206 that a disconnection request has been received, the communication terminal 40 that has transmitted the disconnection request is deleted from the connected device list 226 (step S222).

  If it is determined in step S206 that a disconnection request has not been received, the information management unit 214 determines whether the connected communication terminal 40 has been lost (disconnected) (step S208). In the public wireless LAN providing unit 212, when communication with the communication terminal 40 does not occur for a certain period of time without transmitting or receiving a dissociation frame or deauthentication frame, it is determined in step S208 that the connected communication terminal 40 has been lost. The If it is determined in step S208 that the connected communication terminal 40 has been lost, the information management unit 214 deletes the lost communication terminal 40 from the connected device list 226 (step S222). Further, the access point 20 may disconnect the communication terminal 40 by performing a Dissociation Request or Deauthentication Request (disconnect request), and the information management unit 214 may delete the disconnected communication terminal 40 from the connected device list 226.

  When it is determined in step S208 that the connected terminal is not lost, the information management unit 214 receives the association request or the authentication request (hereinafter referred to as “connection request”) from the communication terminal 40 by the public wireless LAN providing unit 212. It is determined whether or not (step S210).

  If it is determined in step S210 that a connection request has been received, the information management unit 214 determines whether or not connection is possible (step S212). If it is determined in step 212 that connection is possible, the information management unit 214 adds the communication terminal 40 that transmitted the connection request to the connected device list (step S224). If it is determined in step S212 that “connection is not possible”, for example, if the number of communication terminals that can be accommodated by the access point 20 has already been accommodated, or if an abnormality has occurred due to self-diagnosis of the access point 20 Etc. The case where an abnormality has occurred in the access point 20 is exemplified by a case where a relay abnormality between wireless communication interfaces cannot be performed because a communication abnormality has occurred in a wired communication interface.

  When it is determined in step S212 that connection is impossible, the information management unit 214 determines whether or not the communication terminal 40 that transmitted the connection request has been registered in the surrounding device list 227 (step S214). In step S214, when it is determined that there is no registration in the surrounding device list 227, the information management unit 214 adds the communication terminal 40 to the surrounding device list 227 (step S226), and proceeds to step S216.

  If it is determined in step S214 that the information has been registered in the surrounding device list 227, the information management unit 214 determines whether 10 minutes have elapsed from the measurement time (step S216). When it is determined in step S216 that 10 minutes have elapsed, the information management unit 214 creates congestion degree information (step S218).

The degree of congestion is obtained by the following formula.
Congestion level = (number of surrounding device lists + number of connected device lists) / maximum number of connections The surrounding device list 227 is a list of communication terminals 40 that are in the vicinity of the access point 20 and are not connected to the access point 20. The completed list is a list of communication terminals 40 connected to the access point 20. That is, when the number of connected device lists is added to the number of surrounding device lists, the total number of communication terminals 40 in the range connectable to the access point 20 is obtained. The maximum number of connections is the number of communication terminals 40 to which the access point 20 can be connected at the same time, and is determined for each access point 20. By dividing the total number obtained by adding the number of connected device lists to the number of surrounding device lists by the maximum number of connections, the congestion degree of the access point 20 can be calculated.

  Thereafter, the information management unit 214 sets the surrounding device list = empty list and the measurement start time = current time (step S220), and shifts to an idle state (step S204). In the present embodiment, since regular notification from the access point 20 to the management server 30 is performed every 10 minutes, congestion degree information is generated every 10 minutes in accordance with the regular notification interval. The time interval at which the congestion degree information is generated is not limited to this embodiment, and may be set as appropriate. For example, it may be every 5 minutes or every 15 minutes.

A-8. Creation of congestion degree map information on the management server:
FIG. 9 is a diagram illustrating the congestion degree map information displayed on the display screen of the communication terminal. FIG. 9 shows an example of displaying the degree of congestion of the access points 21, 22, and 23 shown in FIG. The management server 30 receives the AP information 221 (including the congestion degree information 223) of each access point based on periodic notifications from the access points 21, 22, and 23. The disaster communication terminal information generation unit 313 analyzes the received AP information 221 and updates the AP information 325 of the hard disk 320. Based on the AP information 325 of each access point 21, 22, 23 included in the AP information 325, the congestion degree map information generation unit 314 displays the installation location and the congestion degree of each access point 21, 22, 23 on the map. The congestion degree map information to be generated is generated and stored in the hard disk 320.

  When receiving an inquiry about the degree of congestion from the communication terminal 40, the inquiry processing unit 311 transmits the congestion degree map information 326 stored in the hard disk 320 to the communication terminal 40 that transmitted the inquiry. For example, an image as shown in FIG. 9 is displayed on the display screen of the communication terminal 40. The user of the communication terminal 40 can try to connect to an access point with a low degree of congestion based on this image. In the present embodiment, the management server 30 generates a congestion degree map and uses the information representing the map as congestion degree map information and transmits it to the communication terminal 40. However, the present invention is not limited to this. For example, the management server uses the congestion degree map information as information necessary for creating a map of the congestion level, including the installation locations and congestion levels of the access points 21, 22, and 23, and the generation of the map is performed in the communication terminal 40. It may be.

A-9. Effects of the embodiment:
According to the wireless connection device (access point 20) of this embodiment, since it functions as a public wireless LAN access point at the time of a disaster, an unspecified communication terminal 40 can be connected, and the congestion of the communication network at the time of a disaster is alleviated. . According to the network system of the present embodiment, at the time of a disaster, the access point 20 acquires information on the communication terminal 40 that can be wirelessly connected to the access point 20, and periodically notifies the management server 30. Store information in a database. Then, in response to the inquiry from the communication terminal 40, the management server 30 creates route information 328 regarding the route of the other communication terminal 40 and transmits it to the communication terminal 40. That is, the network system of the present embodiment helps to confirm the safety and location of the disaster victim by providing the route information 328 of the communication terminal 40 owned by the disaster victim in the event of a disaster.

  The access point 20 according to the present embodiment is not limited to information on the communication terminal 40 wirelessly connected to itself, but also includes information on the communication terminal 40 of the transmission source such as a probe request and a connection request even when not wirelessly connected. 30 is notified. For this reason, for example, the operation of connecting the communication terminal 40 to the access point 20 due to serious injury, unconsciousness, etc. cannot be performed by the victim, and the communication terminal information 224 of the communication terminal 40 can be obtained even if the communication terminal 40 is not connected to the access point 20. Is transmitted to the management server 30. Therefore, it is possible to increase the possibility that the location can be confirmed even by a victim who is seriously injured or unconscious.

  The access point 20 of the present embodiment calculates its own congestion level and transmits it to the management server 30, and the management server 30 sets the multiple access points 20 based on the congestion level information received from the multiple access points 20. Create and provide congestion degree map information for expressing the degree of congestion on a map. Therefore, it is possible to easily search for a free access point 20 at the time of a disaster.

B. Variations:
The present invention is not limited to the above-described embodiment, and can be realized with various configurations without departing from the spirit of the present invention. For example, the technical features in the embodiments corresponding to the technical features in each embodiment described in the summary section of the invention are intended to solve part or all of the above-described problems or to achieve one of the effects described above. In order to achieve part or all, replacement and combination can be appropriately performed. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate. For example, the following modifications are possible, for example.

B-1. Modification 1:
In the above embodiment, the position information 222 of the access point 20 is used as the position of the communication terminal 40, but position information acquired by a GPS function provided in the communication terminal 40 may be used. Even in this way, the position of the communication terminal 40 can be confirmed.

B-2. Modification 2:
In the above embodiment, an example is shown in which the communication terminal 40 is connected to the Internet INT via the access point 21 installed in the evacuation center, and the management server 30 is inquired via the Internet INT. The access point 20 is not limited to those that pass through the access point 20 installed in the network. For example, like the communication terminal 45 shown in FIG. 1, the inquiry may be made via another network NT connected to the management server 30. A person in a place other than the disaster area can connect to the management server via another network and confirm the safety of the disaster person in the disaster area.

B-3. Modification 3:
In the above embodiment, the communication terminal information 224 is generated based on a request such as a probe request, a connection request, a disconnection request, a connection request, a disconnection request, or the like. Although an example is shown, the communication terminal information 224 may be generated based on the above part of the request or the like, or other information transmitted from the communication terminal 40 may be added to generate the communication terminal information 224. Good.

B-4. Modification 4:
In the above embodiment, the access points 21, 22, and 23 are installed at the evacuation shelter, but the access point installation location may not be the evacuation shelter. For example, it may be installed in a private house, company, or the like. Because access points installed in private homes, companies, etc. are opened as public wireless LAN access points in the event of a disaster, the communication terminal can communicate with the access points even while on the way to an evacuation center. Even if the victim is not in the evacuation center, it can contribute to confirmation of safety and whereabouts. In addition, for example, an access point outside an evacuation site such as a private house may be moved to the evacuation site and used.

B-5. Modification 5:
In the above embodiment, natural disasters such as earthquakes and tsunamis and human disasters such as fires have been exemplified as disasters, but are not limited to this. It is good also at the time of disaster.

B-6. Modification 6:
In the above embodiment, an example in which the access point 20 includes the position information 222 of the access point 20 has been described. However, the access point 20 may not include the position information 222. For example, the management server 30 may be configured to include a correspondence table between identification information (MAC address) of each access point 20 and position information. Even in this case, the management server 30 can create trace information based on the identification information of the access point 20 and the communication terminal information received from each access point 20.

B-7. Modification 7:
In the above embodiment, the path information 328 is temporarily stored in the hard disk 320, but is not limited to this. For example, the route information 328 may be created using the RAM 330 and may not be temporarily stored.

20-23 ... Access point 30 ... Management server 40-45 ... Communication terminal 100 ... Network system 210 ... CPU
211 ... Management server communication control unit 213 ... Disaster mode 214 ... Information management unit 221 ... AP information 222 ... Location information 223 ... Congestion degree information 224 ... Communication terminal information 226 ... Connected device list 227 ... Surrounding device list 240 ... Wireless communication interface 250 ... Wired communication interface 310 ... CPU
311 ... Query processing unit 313 ... Disaster communication terminal information generation unit 314 ... Congestion degree map information generation unit 321 ... Database 322 ... Communication terminal information 323 ... Group information 324 ... Trace log information 325 ... AP information 326 ... Congestion degree map information 327 ... Disaster communication terminal information 328 ... Route information 350 ... Wired communication interface 212 ... Public wireless LAN providing unit 220, 320 ... Flash ROM
312 ... Public wireless LAN communication control unit NT ... Network INT ... Internet

Claims (10)

A network system comprising a wireless connection device and a management server,
The wireless connection device is:
A public wireless LAN providing unit that enables wireless connection with an unspecified communication terminal and constructs a public wireless LAN in a disaster that occurs at the time of a specific event;
An information management unit that generates communication terminal information related to a first communication terminal that is a transmission source of a signal received by the wireless connection device at the time of the disaster;
A management server communication control unit for transmitting the communication terminal information to the management server at the time of the disaster;
With
The management server
A disaster communication terminal information generation unit is provided that generates disaster communication terminal information including position information regarding the position of the first communication terminal based on the communication terminal information received from the wireless connection device at the time of the disaster. ,
Network system. The network system according to claim 1,
The management server
When the first inquiry information related to the disaster communication terminal information is received from the second communication terminal connected to the management server at the time of the disaster, the first communication terminal is based on the first inquiry information. An inquiry processing unit for generating route information including information on the position of the first communication terminal from the disaster communication terminal information and transmitting the route information to the second communication terminal;
Network system. The network system according to claim 2 is:
A plurality of the wireless connection devices;
The management server
Based on the communication terminal information received from a plurality of the wireless connection devices, generate the route information including information on the movement route of the first communication terminal,
Network system. In the network system according to claim 2 or 3,
The management server
A storage unit storing group information in which identification information of at least one first communication terminal and identification information of at least one second communication terminal are associated before the occurrence of the disaster;
The inquiry processing unit
Based on the group information, the first communication terminal associated with the second communication terminal that transmitted the first inquiry information is extracted, and at least one of the extracted first communication terminals is Transmitting the route information to the second communication terminal;
Network system. In the network system according to any one of claims 1 to 4,
The wireless connection device is:
A congestion degree information generation unit that generates congestion degree information including the congestion degree of the wireless connection apparatus and position information regarding the position of the wireless connection apparatus;
The management server communication control unit
Transmitting the congestion degree information to the management server;
Network system. In the network system according to any one of claims 2 to 4,
The wireless connection device is:
A congestion degree information generation unit that generates congestion degree information including the congestion degree of the wireless connection apparatus and position information regarding the position of the wireless connection apparatus;
The management server communication control unit
Transmitting the congestion degree information to the management server;
The management server
Congestion degree map information for generating congestion degree map information for displaying the position of the wireless connection apparatus and the congestion degree on a map based on the congestion degree information received from at least one of the wireless connection apparatuses. With a generator,
The inquiry processing unit
When the second inquiry information related to the congestion degree map information is received from the second communication terminal, the congestion degree map information is transmitted to the second communication terminal.
Network system. A network system according to any one of claims 1 to 6, comprising:
In the wireless connection device,
The information management unit
Generating the communication terminal information based on a probe request transmitted from the first communication terminal;
Network system. A wireless connection device,
A public wireless LAN providing unit that enables wireless connection with an unspecified communication terminal and constructs a public wireless LAN in a disaster that occurs at the time of a specific event;
An information management unit that generates communication terminal information related to a first communication terminal that is a transmission source of a signal received by the wireless connection device at the time of the disaster;
A management server communication control unit for transmitting the communication terminal information to the management server connected to the wireless connection device at the time of the disaster;
A wireless connection device. The wireless connection device according to claim 8, wherein
The information management unit
Generating the communication terminal information based on a probe request transmitted from the first communication terminal;
Wireless connection device. The wireless connection device according to claim 8 or 9,
A congestion degree information generation unit that generates congestion degree information including information on the congestion degree of the wireless connection apparatus and the position of the wireless connection apparatus;
The management server communication control unit
Transmitting the congestion degree information to the management server;
Wireless connection device.

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