JP6135996B2 - Wireless communication system, information distribution apparatus, and communication control method - Google Patents

Description

  The present invention relates to a wireless communication system, an information distribution apparatus, and a communication control method, and more particularly to a wireless communication system, an information distribution apparatus, and a communication control method for distributing information related to a disaster.

  In a mobile communication system, a communication service is provided by a radio base station apparatus that forms a cell that is an area in which a radio terminal apparatus can communicate.

  An M2M (Machine to Machine) system is known as a system using such a communication service. In the M2M system, devices equipped with wireless devices exchange information with each other without human intervention, so that the inventory status of products built in vending machines is automatically reported to a server, etc. The device is automatically controlled.

  As an example of the M2M system, for example, Patent Literature 1 (Japanese Patent No. 4237134) discloses the following technology. That is, a mobile communication network having a wireless terminal, a gateway node capable of wireless communication with the wireless terminal, a location information storage device that holds location information of the wireless terminal, and a message transmission destination from the wireless terminal This is a network system in which another network to which a certain terminal is connected is connected via a gateway. The network system includes terminal address holding means for holding the address of the terminal that is a transmission destination predetermined for each wireless terminal. When transmitting a message from the wireless terminal to the terminal, when the gateway node receives a wireless frame from the wireless terminal, the gateway node accesses the terminal address holding unit, and sends a message destination terminal to each wireless terminal. An address is specified, and a message is transmitted to the specified destination terminal via the gateway. When transmitting a message from the terminal to the wireless terminal, the gateway accesses the position information storage device, acquires position information from the ID of the wireless terminal, and the corresponding gateway node from the acquired position information Forward the message to The gateway node transfers the message to the wireless terminal.

Japanese Patent No. 4237134

  When a disaster such as an earthquake occurs, a user who uses such a communication system such as an M2M system tries to connect to the network using, for example, an owned wireless terminal device in order to acquire various types of information.

  However, during such a disaster, many users try to connect to the network and acquire information at the same time, so that congestion occurs in the network, making it difficult to connect to the network, and information acquisition can be performed smoothly. It will disappear.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a wireless communication system, an information distribution apparatus, and a communication control method capable of supporting information acquisition from a network when a disaster occurs. Is to provide.

  (1) In order to solve the above-described problem, a wireless communication system according to an aspect of the present invention includes a management device capable of communicating with one or a plurality of wireless terminal devices, connected to the management device, and acting when a disaster occurs. The management device receives disaster information indicating the occurrence of a disaster, acquires the behavior information from the storage device, and acquires the acquired behavior information for each of the wireless terminal devices. To inform.

  (5) A wireless communication system according to another aspect of the present invention includes a management device, a network-side storage device that is connected to the management device and stores behavior information related to actions in the event of a disaster, the management device, and the network And a gateway device that relays communication between one or a plurality of wireless terminal devices and the management device, and a local storage device connected to the gateway device, the local storage device is connected to the network side A part or all of the behavior information stored in a storage device is stored, the gateway device receives disaster information indicating the occurrence of a disaster, acquires the behavior information from the local storage device, and the acquired behavior information Is notified to each wireless terminal device.

  (7) In order to solve the above problem, an information distribution apparatus according to an aspect of the present invention is an information distribution apparatus capable of communicating with one or a plurality of wireless terminal apparatuses, and receives disaster information indicating the occurrence of a disaster. A behavior information acquisition unit that acquires the behavior information from a storage device that stores behavior information related to the behavior at the time of the occurrence of the disaster, and an behavior that notifies the wireless terminal device of the behavior information acquired by the behavior information acquisition unit And an information distribution unit.

  (8) In order to solve the above-described problem, a communication control method according to an aspect of the present invention is a communication control method in an information distribution device capable of communicating with one or a plurality of wireless terminal devices, and indicates a disaster occurrence Receiving the information and acquiring the behavior information from a storage device that stores the behavior information related to the behavior at the time of the disaster, and notifying the wireless terminal device of the acquired behavior information.

  According to the present invention, it is possible to support information acquisition from a network when a disaster occurs.

FIG. 1 is a diagram showing a configuration of a wireless communication system according to the first embodiment of the present invention. FIG. 2 is a diagram illustrating distribution of behavior information by the wireless communication system according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating an example of a usage pattern during normal time of the wireless communication system according to the first embodiment of the present invention. FIG. 4 is a diagram illustrating information acquisition by the wireless terminal device in the wireless communication system according to the first embodiment of the present invention. FIG. 5 is a diagram showing a configuration of a management device in the wireless communication system according to the first embodiment of the present invention. FIG. 6 is a flowchart defining an operation procedure when the management apparatus according to the first embodiment of the present invention distributes information. FIG. 7 is a diagram showing an example of an information distribution sequence in the wireless communication system according to the first embodiment of the present invention. FIG. 8 is a diagram showing a configuration of a wireless communication system according to the second embodiment of the present invention. FIG. 9 is a diagram illustrating a configuration of the gateway device in the wireless communication system according to the second embodiment of the present invention. FIG. 10 is a flowchart defining an operation procedure when the management apparatus according to the second embodiment of the present invention distributes information. FIG. 11 is a diagram showing an example of an information distribution sequence in the wireless communication system according to the second embodiment of the present invention.

  First, the contents of the embodiment of the present invention will be listed and described.

  (1) In order to solve the above-described problem, a wireless communication system according to an aspect of the present invention includes a management device capable of communicating with one or a plurality of wireless terminal devices, connected to the management device, and acting when a disaster occurs. The management device receives disaster information indicating the occurrence of a disaster, acquires the behavior information from the storage device, and acquires the acquired behavior information for each of the wireless terminal devices. To inform.

  As described above, the behavior information is stored in the storage device in advance before the occurrence of the disaster, and the behavior information stored in the storage device is notified to the wireless terminal device when the disaster occurs, so that each user can connect to the network. Information can be distributed to each user prior to obtaining the information. Thereby, it is possible to prevent the user from acquiring information from the network and prevent a large number of users from simultaneously connecting to the network and acquiring information. In other words, each user can acquire appropriate information at the time of the disaster while suppressing congestion of the network immediately after the disaster occurs, and a wireless communication system having high information transmission performance at the time of the disaster can be provided. . In addition, the behavior information may include information on the disaster itself, but is information that provides not only information on the disaster itself but also action guidelines when the disaster occurs. This makes it possible to provide more useful information to the user when a disaster occurs. Therefore, it is possible to support information acquisition from the network when a disaster occurs.

  (2) Preferably, the management device selects a part or all of the behavior information stored in the storage device, and notifies the wireless terminal device of the selected behavior information.

  With such a configuration, it is possible to select and distribute appropriate information from the behavior information stored in the storage device.

  (3) More preferably, the management device selects the action information according to an elapsed time after receiving the disaster information.

  With such a configuration, it is possible to realize information distribution that flexibly corresponds to the contents of information requests that change over time.

  (4) Preferably, the said management apparatus can restrict | limit the access to other apparatuses via self, The said management apparatus eases the restriction | limiting of the said access after alert | reporting the said action information.

  With such a configuration, it is possible to improve the convenience of user information acquisition while suppressing network congestion immediately after the occurrence of a disaster.

  (5) A wireless communication system according to another aspect of the present invention includes a management device, a network-side storage device that is connected to the management device and stores behavior information related to actions in the event of a disaster, the management device, and the network And a gateway device that relays communication between one or a plurality of wireless terminal devices and the management device, and a local storage device connected to the gateway device, the local storage device is connected to the network side A part or all of the behavior information stored in a storage device is stored, the gateway device receives disaster information indicating the occurrence of a disaster, acquires the behavior information from the local storage device, and the acquired behavior information Is notified to each wireless terminal device.

  In this way, each user is connected to the network by storing the behavior information in the local storage device before the occurrence of the disaster and notifying the wireless terminal device of the behavior information stored in the local storage device when the disaster occurs. Thus, the information can be distributed to each user before the information is acquired. Thereby, it is possible to prevent the user from acquiring information from the network and prevent a large number of users from simultaneously connecting to the network and acquiring information. In other words, each user can acquire appropriate information at the time of the disaster while suppressing congestion of the network immediately after the disaster occurs, and a wireless communication system having high information transmission performance at the time of the disaster can be provided. . In addition, the behavior information may include information on the disaster itself, but is information that provides not only information on the disaster itself but also action guidelines when the disaster occurs. This makes it possible to provide more useful information to the user when a disaster occurs.

  In addition, with the configuration of distributing information from the gateway device provided on the local side, that is, in front of the network, to the wireless terminal device, access to the network by the wireless terminal device immediately after the occurrence of a disaster can be further suppressed. Further, even when a communication failure occurs in a network or the like due to a disaster, necessary information can be distributed to the user. As a result, while further suppressing congestion of the network immediately after the occurrence of the disaster, each user can more reliably acquire appropriate information in the disaster and provide a wireless communication system with higher information transmission performance at the time of the disaster can do.

  (6) Preferably, the wireless terminal device requests the gateway device to provide the behavior information, and the gateway device acquires the behavior information from the local storage device and transmits the behavior information to the wireless terminal device. Or the request content of the wireless terminal device is notified to the management device, and the management device acquires and acquires the behavior information corresponding to the request content notified from the gateway device from the network side storage device. The behavior information is transmitted to the gateway device, and the gateway device transmits the behavior information received from the management device to the wireless terminal device.

  With such a configuration, appropriate information can be distributed to the wireless terminal device even when the information requested by the wireless terminal device is not stored in the local database, or even when the information stored in the local database is old. .

  (7) In order to solve the above problem, an information distribution apparatus according to an aspect of the present invention is an information distribution apparatus capable of communicating with one or a plurality of wireless terminal apparatuses, and receives disaster information indicating the occurrence of a disaster. A behavior information acquisition unit that acquires the behavior information from a storage device that stores behavior information related to the behavior at the time of the occurrence of the disaster, and an behavior that notifies the wireless terminal device of the behavior information acquired by the behavior information acquisition unit And an information distribution unit.

  As described above, the behavior information is stored in the storage device in advance before the occurrence of the disaster, and the behavior information stored in the storage device is notified to the wireless terminal device when the disaster occurs, so that each user can connect to the network. Information can be distributed to each user prior to obtaining the information. Thereby, it is possible to prevent the user from acquiring information from the network and prevent a large number of users from simultaneously connecting to the network and acquiring information. In other words, each user can acquire appropriate information at the time of the disaster while suppressing congestion of the network immediately after the disaster occurs, and a wireless communication system having high information transmission performance at the time of the disaster can be provided. . In addition, the behavior information may include information on the disaster itself, but is information that provides not only information on the disaster itself but also action guidelines when the disaster occurs. This makes it possible to provide more useful information to the user when a disaster occurs. Therefore, it is possible to support information acquisition from the network when a disaster occurs.

  (8) In order to solve the above-described problem, a communication control method according to an aspect of the present invention is a communication control method in an information distribution device capable of communicating with one or a plurality of wireless terminal devices, and indicates a disaster occurrence Receiving the information and acquiring the behavior information from a storage device that stores the behavior information related to the behavior at the time of the disaster, and notifying the wireless terminal device of the acquired behavior information.

  As described above, the behavior information is stored in the storage device in advance before the occurrence of the disaster, and the behavior information stored in the storage device is notified to the wireless terminal device when the disaster occurs, so that each user can connect to the network. Information can be distributed to each user prior to obtaining the information. Thereby, it is possible to prevent the user from acquiring information from the network and prevent a large number of users from simultaneously connecting to the network and acquiring information. In other words, each user can acquire appropriate information at the time of the disaster while suppressing congestion of the network immediately after the disaster occurs, and a wireless communication system having high information transmission performance at the time of the disaster can be provided. . In addition, the behavior information may include information on the disaster itself, but is information that provides not only information on the disaster itself but also action guidelines when the disaster occurs. This makes it possible to provide more useful information to the user when a disaster occurs. Therefore, it is possible to support information acquisition from the network when a disaster occurs.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<First Embodiment>
[Configuration and basic operation]
FIG. 1 is a diagram showing a configuration of a wireless communication system according to the first embodiment of the present invention.

  With reference to FIG. 1, the wireless communication system 301 includes a management device (information distribution device) 101 and a storage device 151. The management apparatus 101 may include a storage device 151. Further, the wireless communication system 301 may include a plurality of management devices 101 or a plurality of storage devices 151.

  The management apparatus 101 can communicate with a plurality of wireless terminal apparatuses 202 and one or a plurality of sensors 161 via a network 251.

  The network 251 includes, for example, a mobile wireless communication system conforming to LTE (Long Term Evolution) standardized by 3GPP (Third Generation Partnership Project), or a wireless LAN system standardized by IEEE 802.11.

  The wireless terminal device 202 can communicate with other devices such as the management device 101 via the network 251 by transmitting and receiving wireless signals to and from a communication device such as a wireless base station device (not shown) in the network 251.

  The sensor 161 can communicate with other devices such as the management device 101 via the network 251 by performing wired communication or wireless communication with a communication device in the network 251.

  Note that the wireless communication system 301 may include a device that provides some information in addition to the sensor 161 or instead of the sensor 161.

  The storage device 151 is connected to the management device 101. The storage device 151 stores a database of behavior information related to behavior at the time of disaster occurrence.

  This behavior information includes information that serves as a guideline for the behavior of the user of the wireless terminal device 202 or a guideline for the behavior of another person such as a doctor. Further, this behavior information is updated regularly or irregularly regardless of the occurrence of a disaster.

  Specifically, for example, the management device 101 and the storage device 151 are provided in units of areas such as municipalities, and the storage device 151 includes hazard maps such as information on shelters, traffic information, disaster status, and evacuation instructions. The information is memorized. For example, the hazard map is updated by the local government during normal times. Further, the storage device 151 may store information obtained by data analysis of website information.

  Further, the storage device 151 may store information before the occurrence of the disaster, or may store various information after the occurrence of the disaster. Specifically, for example, traffic information, location information of nearby hospitals and shelters, medical information such as medical records, weather forecasts, and safety information can be stored in the storage device 151. Further, for example, in a state where a certain amount of time has passed since the occurrence of the disaster, traffic information obtained by analyzing data such as Twitter (registered trademark) and Facebook (registered trademark) is stored in the storage device 151. Is also possible.

  Information stored in the storage device 151 can be different for each area. For example, in a state where a certain amount of time has passed since the occurrence of the disaster, information such as food, electricity and gas is stored in the disaster-affected center area. Also, information such as traffic information and neighborhood maps is stored in an area far from the disaster center.

  FIG. 2 is a diagram illustrating distribution of behavior information by the wireless communication system according to the first embodiment of the present invention.

  With reference to FIG. 2, the management apparatus 101 receives disaster information indicating the occurrence of a disaster, acquires behavior information from the storage device 151, and notifies each wireless terminal device 202 of the acquired behavior information via the network 251. .

  The disaster information may be information from sensors, earthquake measuring instruments, or the like, or the operator may notify the management apparatus 101 of the disaster information manually.

  For example, the management device 101 has different behavior information for each area where the wireless terminal device 202 exists, depending on the location information of the wireless terminal device 202 in the mobile communication system such as LTE or the location information of the wireless terminal device 202 using GPS. Can be delivered.

  In addition, from the viewpoint of preventing network congestion at the time of a disaster, the management apparatus 101 preferably performs behavior information notification a few times, for example, once or twice.

  FIG. 3 is a diagram illustrating an example of a usage pattern during normal time of the wireless communication system according to the first embodiment of the present invention.

  With reference to FIG. 3, the sensor 161 measures the amount of power used, the amount of gas used, and the like, and transmits sensor information indicating the measurement result to the management apparatus 101 via the network 251.

  The management device 101 stores the sensor information received from the sensor 161 in the storage device 151.

  The sensor information stored in the storage device 151 is used for data collection and analysis of public services.

  In this way, the configuration for collecting public service data during normal times allows the storage device 151 to be used effectively, and the versatility of the system can be improved.

  FIG. 4 is a diagram illustrating information acquisition by the wireless terminal device in the wireless communication system according to the first embodiment of the present invention.

  With reference to FIG. 4, the management apparatus 101 changes access control to the database of the storage device 151, that is, an access policy, during normal times and when a disaster occurs.

  For example, the management device 101 prohibits the wireless terminal device 202 from accessing the database of the storage device 151 during normal times, and permits the wireless terminal device 202 to access the database when a disaster occurs.

  Further, for example, the management device 101 suppresses congestion in the network by prohibiting access to the database by the wireless terminal device 202 immediately after the occurrence of the disaster, and when a certain amount of time has elapsed from the occurrence of the disaster, Allow access to the database.

  Note that the access permission target may be a database of behavior information or a database of other information.

  In this way, the management apparatus 101 switches from push type information distribution to pull type information distribution after a disaster occurs.

  Thereby, the user can acquire information, such as electricity, gas, food, etc. which are needed for future life after a disaster occurs independently.

  In addition, the management apparatus 101 can restrict access to other apparatuses through itself, instead of accessing the database of the storage device 151.

  FIG. 5 is a diagram showing a configuration of a management device in the wireless communication system according to the first embodiment of the present invention.

  Referring to FIG. 5, management device 101 includes behavior information acquisition unit 11, behavior information distribution unit 12, and access control unit 13.

  The behavior information acquisition unit 11 receives disaster information indicating the occurrence of a disaster and acquires behavior information from the storage device 151.

  For example, the behavior information acquisition unit 11 selects and acquires part or all of the behavior information stored in the storage device 151. Specifically, the behavior information acquisition unit 11 selects behavior information according to the elapsed time after receiving the disaster information.

  The behavior information distribution unit 12 notifies each wireless terminal device 202 of the behavior information acquired by the behavior information acquisition unit 11.

  The access control unit 13 can restrict access from the wireless terminal device 202 to another device via itself, for example, access to the storage device 151. After the behavior information is notified by the behavior information distribution unit 12, the access control unit 13 relaxes the access restriction.

[Operation]
Next, information distribution by the wireless communication system according to the first embodiment of the present invention will be described with reference to the drawings.

  Each device in the wireless communication system 301 reads and executes a program including each step of the following flowchart and sequence from a memory (not shown). This program can be installed externally.

  FIG. 6 is a flowchart defining an operation procedure when the management apparatus according to the first embodiment of the present invention distributes information.

  Referring to FIG. 6, first, when receiving disaster information (YES in step S <b> 1), management apparatus 101 selects and acquires distribution information A from the database of storage device 151. The distribution information A is action information that is highly necessary immediately after the occurrence of a disaster, such as evacuation center information (step S2).

  Next, the management apparatus 101 broadcasts the acquired distribution information A to the wireless terminal apparatus 202 (step S3).

  Next, when a predetermined time has elapsed (YES in step S4), the management apparatus 101 selects and acquires the distribution information B from the database of the storage device 151. The distribution information B is action information that becomes highly necessary after a disaster has occurred, such as traffic information and weather forecast (step S5).

  Next, the management apparatus 101 broadcasts the acquired distribution information B to the wireless terminal apparatus 202 (step S6).

  Next, after broadcasting the distribution information B, the management apparatus 101 relaxes or releases restrictions on access to other apparatuses via the database of the storage apparatus 151 or the self by the wireless terminal apparatus 202 (step S7).

  Note that the management apparatus 101 is not limited to a configuration that broadcasts distribution information, but may be configured to perform multicasting.

  In addition, the management apparatus 101 may be configured to broadcast all information as distribution information without being limited to some information in the database.

  FIG. 7 is a diagram showing an example of an information distribution sequence in the wireless communication system according to the first embodiment of the present invention.

  With reference to FIG. 7, first, when a disaster detection device (not shown) detects the occurrence of a disaster (step S11), it transmits disaster information to the management device 101 (step S12).

  Next, the management apparatus 101 receives disaster information from the disaster detection apparatus and broadcasts distribution information A to the wireless terminal apparatus 202 (step S13).

  Next, when a predetermined time has elapsed, the management apparatus 101 broadcasts the distribution information B to the wireless terminal apparatus 202 (step S14).

  Further, the sensor 161 transmits sensor information to the management apparatus 101, for example, when a new measurement result is obtained (step S15).

  Next, the management apparatus 101 receives new sensor information from the sensor 161, creates distribution information C based on the content of the sensor information, and broadcasts it to the wireless terminal apparatus 202 (step S16).

  Next, the wireless terminal device 202 transmits an information request indicating a request for distribution of certain information to the management device 101 (step S17).

  Next, when the access from the wireless terminal device 202 is permitted, the management device 101 creates distribution information D based on the information request received from the wireless terminal device 202 and unicasts to the wireless terminal device 202. (Step S18).

  By the way, when a disaster such as an earthquake occurs, a user who uses a communication system such as an M2M system tries to connect to a network using, for example, a wireless terminal device that he owns in order to acquire various types of information. However, during such a disaster, many users try to connect to the network and acquire information at the same time, so that congestion occurs in the network, making it difficult to connect to the network, and information acquisition can be performed smoothly. It will disappear.

  On the other hand, in the wireless communication system according to the first embodiment of the present invention, the storage device 151 is connected to the management device 101 and stores behavior information related to actions at the time of disaster occurrence. Then, the management apparatus 101 receives disaster information indicating the occurrence of a disaster, acquires behavior information from the storage device 151, and notifies each wireless terminal device 202 of the acquired behavior information. More specifically, in the management device according to the first embodiment of the present invention, the behavior information acquisition unit 11 receives disaster information indicating the occurrence of a disaster and stores behavior information related to the behavior at the time of the disaster. Action information is acquired from the device 151. Then, the behavior information distribution unit 12 notifies the wireless terminal device 202 of the behavior information acquired by the behavior information acquisition unit 11.

  As described above, the behavior information is stored in the storage device 151 in advance before the occurrence of the disaster, and the behavior information stored in the storage device 151 is notified to the wireless terminal device 202 when the disaster occurs, so that each user can connect to the network. Information can be distributed to each user prior to connecting and acquiring information.

  Thereby, it is possible to prevent the user from acquiring information from the network and prevent a large number of users from simultaneously connecting to the network and acquiring information. In other words, each user can acquire appropriate information at the time of the disaster while suppressing congestion of the network immediately after the disaster occurs, and a wireless communication system having high information transmission performance at the time of the disaster can be provided. .

  In addition, the behavior information may include information on the disaster itself, but is information that provides not only information on the disaster itself but also action guidelines when the disaster occurs. This makes it possible to provide more useful information to the user when a disaster occurs.

  Therefore, the wireless communication system and the management apparatus according to the first embodiment of the present invention can support information acquisition from the network when a disaster occurs.

  Further, in the wireless communication system according to the first embodiment of the present invention, the management apparatus 101 selects part or all of the behavior information stored in the storage device 151 and transmits the selected behavior information to each wireless Notify the terminal device 202. More specifically, in the management device according to the first embodiment of the present invention, the behavior information acquisition unit 11 selects and acquires part or all of the behavior information stored in the storage device 151.

  With such a configuration, it is possible to select and distribute appropriate information from the behavior information stored in the storage device 151.

  Further, in the wireless communication system according to the first embodiment of the present invention, the management apparatus 101 selects action information corresponding to the elapsed time since receiving the disaster information. More specifically, in the management device according to the first embodiment of the present invention, the behavior information acquisition unit 11 selects behavior information according to the elapsed time since receiving the disaster information.

  With such a configuration, it is possible to realize information distribution that flexibly corresponds to the contents of information requests that change over time.

  Further, in the wireless communication system according to the first embodiment of the present invention, the management apparatus 101 can restrict access to other apparatuses via itself. After notifying the behavior information, the management apparatus 101 relaxes the access restriction. More specifically, in the management device according to the first embodiment of the present invention, the access control unit 13 can restrict access from the wireless terminal device 202 to other devices via itself. Then, after the behavior information is notified by the behavior information distribution unit 12, the access control unit 13 relaxes the access restriction.

  With such a configuration, it is possible to improve the convenience of user information acquisition while suppressing congestion of the network 251 immediately after the occurrence of a disaster.

  Next, another embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<Second Embodiment>
The present embodiment relates to a radio communication system in which a database is also added to the local side as compared with the radio communication system according to the first embodiment. The contents other than those described below are the same as those of the wireless communication system according to the first embodiment.

  FIG. 8 is a diagram showing a configuration of a wireless communication system according to the second embodiment of the present invention.

  Referring to FIG. 8, the wireless communication system 302 includes a management device 101, a storage device 151, one or more gateway devices (information distribution devices) 111, and one or more storage devices 121. Note that the gateway device 111 may include the storage device 121.

  The management device 101 can communicate with a plurality of wireless terminal devices 202 via the network 251 and the gateway device 111.

  The gateway device 111 is, for example, a wireless LAN access point, is connected to the management device 101 via the network 251, and relays communication between one or more wireless terminal devices 202 and the management device 101. The gateway device 111 is wired or wirelessly connected to the network 251.

  The wireless terminal device 202 can communicate with other devices such as the management device 101 via the network 251 by transmitting and receiving wireless signals to and from the gateway device 111.

  The storage device 121 is connected to the gateway device 111 and stores a local database of behavior information.

  The gateway device 111 receives disaster information indicating the occurrence of a disaster, acquires behavior information from the storage device 121, and notifies the wireless terminal device 202 of the acquired behavior information.

  FIG. 9 is a diagram illustrating a configuration of the gateway device in the wireless communication system according to the second embodiment of the present invention.

  Referring to FIG. 9, gateway device 111 includes a behavior information acquisition unit 21, a behavior information distribution unit 22, and an access control unit 23.

  The behavior information acquisition unit 21 receives disaster information indicating the occurrence of a disaster from, for example, the management device 101 and acquires behavior information from the storage device 121.

  For example, the behavior information acquisition unit 21 selects and acquires part or all of the behavior information stored in the storage device 121. Specifically, the behavior information acquisition unit 21 selects behavior information according to the elapsed time after receiving the disaster information.

  The behavior information distribution unit 22 notifies the wireless terminal device 202 of the behavior information acquired by the behavior information acquisition unit 21.

  The access control unit 23 can restrict access from the wireless terminal device 202 to another device via itself, for example, access to the storage device 121. After the behavior information is notified by the behavior information distribution unit 22, the access control unit 23 relaxes the access restriction.

[Operation]
Next, information distribution by the wireless communication system according to the second embodiment of the present invention will be described with reference to the drawings.

  Each device in the wireless communication system 302 reads out a program including steps of the following flowchart and sequence from a memory (not shown) and executes the program. This program can be installed externally.

  FIG. 10 is a flowchart defining an operation procedure when the management apparatus according to the second embodiment of the present invention distributes information.

  Referring to FIG. 10, first, when gateway apparatus 111 receives disaster information (YES in step S41), gateway apparatus 111 selects and acquires distribution information A from the local database of storage device 121. The distribution information A is action information that is highly necessary immediately after the occurrence of the disaster, such as evacuation center information (step S42).

  Next, the gateway device 111 broadcasts the acquired distribution information A to the wireless terminal device 202 (step S43).

  Next, when a predetermined time has elapsed (YES in step S44), the gateway device 111 selects and acquires the distribution information B from the local database of the storage device 121. The distribution information B is action information that becomes highly necessary after a disaster has occurred, such as traffic information and weather forecast (step S45).

  Next, the gateway device 111 broadcasts the acquired distribution information B to the wireless terminal device 202 (step S46).

  Next, after broadcasting the distribution information B, the gateway device 111 relaxes or releases restrictions on access to the local database of the storage device 121 by the wireless terminal device 202 or another device via itself (step S47).

  Note that the gateway device 111 is not limited to a configuration that broadcasts distribution information, and may be configured to perform multicasting.

  The gateway device 111 is not limited to the configuration for acquiring the disaster information from the management device 101, and may be configured to acquire the disaster information by another method.

  FIG. 11 is a diagram showing an example of an information distribution sequence in the wireless communication system according to the second embodiment of the present invention.

  For example, the wireless terminal device 202 requests the gateway device 111 to provide behavior information.

  The gateway device 111 acquires behavior information corresponding to the request content of the wireless terminal device 202 from the storage device 121 and transmits it to the wireless terminal device 202, or notifies the management device 101 of the request content of the wireless terminal device 202.

  The management device 101 acquires behavior information corresponding to the request content notified from the gateway device 111 from the storage device 151, and transmits the acquired behavior information to the gateway device 111.

  The gateway device 111 transmits the behavior information received from the management device 101 to the wireless terminal device 202.

  Specifically, referring to FIG. 11, when a disaster detection device (not shown) detects the occurrence of a disaster (step S21), it transmits disaster information to the management device 101 (step S22).

  Next, the management apparatus 101 transmits the disaster information received from the disaster detection apparatus to the gateway apparatus 111 (step S23).

  Next, the gateway device 111 receives disaster information from the management device 101, and broadcasts the distribution information A to the wireless terminal device 202 (step S24).

  Next, when a predetermined time has elapsed, the gateway device 111 broadcasts the distribution information B to the wireless terminal device 202 (step S25).

  Next, the wireless terminal device 202 transmits an information request indicating a request for distribution of certain information to the gateway device 111 (step S26).

  Next, when the gateway device 111 permits access from the wireless terminal device 202 and the information requested from the wireless terminal device 202 exists in the local database of the storage device 121, the gateway device 111 changes the information request from the local database. The corresponding distribution information C is acquired and unicasted to the wireless terminal device 202 (step S27).

  Next, the wireless terminal device 202 transmits an information request indicating that information distribution is requested to the gateway device 111 (step S28).

  Next, when the gateway device 111 permits access from the wireless terminal device 202 and the information requested by the wireless terminal device 202 does not exist in the local database of the storage device 121, the gateway device 111 determines that the information request is transmitted to the management device 101. (Step S29). If the information requested from the wireless terminal device 202 exists in the local database but the update time of the information is old, the gateway device 111 transmits the information request to the management device 101 and wirelessly transmits the latest information. You may provide to the terminal device 202. FIG.

  Next, when the management apparatus 101 receives the information request from the gateway apparatus 111 and the information requested from the wireless terminal apparatus 202 exists in the database of the storage device 151, the distribution information D corresponding to the information request from the database. Is acquired and transmitted to the gateway device 111 (step S30).

  Next, the gateway device 111 unicasts the distribution information D received from the management device 101 to the wireless terminal device 202 (step S31).

  As described above, in the wireless communication system according to the second embodiment of the present invention, the gateway device 111 is connected to the management device 101 via the network, and is connected between one or a plurality of wireless terminal devices 202 and the management device 101. Relay communication. The storage device 121 is connected to the gateway device 111 and stores behavior information related to behavior at the time of disaster occurrence. Then, the gateway device 111 receives disaster information indicating the occurrence of a disaster, acquires behavior information from the storage device 121, and notifies each wireless terminal device 202 of the acquired behavior information.

  In the gateway device according to the second embodiment of the present invention, the behavior information acquisition unit 21 receives the disaster information indicating the occurrence of the disaster and stores the behavior information regarding the behavior at the time of the disaster. Get behavior information. Then, the behavior information distribution unit 22 notifies the wireless terminal device 202 of the behavior information acquired by the behavior information acquisition unit 21.

  As described above, the configuration in which information is distributed from the gateway device 111 provided on the local side, that is, in front of the network 251 to the wireless terminal device 202, further suppresses access to the network 251 by the wireless terminal device 202 immediately after a disaster occurs. be able to. Further, even when a communication failure occurs in the network 251 or the like due to the occurrence of a disaster, necessary information can be distributed to the user. As a result, while further suppressing congestion of the network immediately after the occurrence of the disaster, each user can more reliably acquire appropriate information in the disaster and provide a wireless communication system with higher information transmission performance at the time of the disaster can do.

  In the wireless communication system according to the second embodiment of the present invention, the wireless terminal device 202 requests the gateway device 111 to provide behavior information. The gateway device 111 acquires behavior information from the storage device 121 and transmits the behavior information to the wireless terminal device 202 or notifies the management device 101 of the request content of the wireless terminal device 202. The management device 101 acquires behavior information corresponding to the request content notified from the gateway device 111 from the storage device 151, and transmits the acquired behavior information to the gateway device 111. The gateway device 111 transmits the behavior information received from the management device 101 to the wireless terminal device 202.

  With such a configuration, even when the information requested by the wireless terminal device 202 is not stored in the local database, or even when the information stored in the local database is old, appropriate information is distributed to the wireless terminal device 202. Can do.

  Since other configurations and operations are the same as those of the wireless communication system according to the first embodiment, detailed description thereof will not be repeated here.

  The above embodiment should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

11, 21 Action information acquisition unit 12, 22 Action information distribution unit 13, 23 Access control unit 101 Management device (information distribution device)
111 Gateway device (information distribution device)
121, 151 Storage device 161 Sensor 202 Wireless terminal device 251 Network 301, 302 Wireless communication system

Claims (3)

A management device;
A network-side storage device that is connected to the management device and stores behavior information related to behavior at the time of a disaster;
A gateway device connected to the management device via a network and relaying communication between one or more wireless terminal devices and the management device;
A local storage device connected to the gateway device and storing behavior information related to behavior at the time of disaster occurrence;
The gateway device receives disaster information indicating the occurrence of a disaster, acquires the behavior information from the local storage device, and informs the wireless terminal device of the acquired behavior information,
The gateway device selects a part or all of the behavior information stored in the local storage device, and informs each wireless terminal device of the selected behavior information,
The gateway device selects the behavior information of a type corresponding to the elapsed time since receiving the disaster information ,
The wireless terminal device requests the gateway device to provide the behavior information;
The gateway device acquires the behavior information from the local storage device and transmits the behavior information to the wireless terminal device, or notifies the management device of the request content of the wireless terminal device,
The management device acquires the behavior information corresponding to the request content notified from the gateway device from the network storage device, and transmits the acquired behavior information to the gateway device.
The gateway device transmits the behavior information received from the management device to the wireless terminal device,
The gateway device, when the behavior information corresponding to the request content notified from the wireless terminal device exists in the local storage device, the update time of the behavior information in the local storage device is old, the wireless device A wireless communication system for notifying the management device of a request content of a terminal device . An information distribution device capable of communicating with one or more wireless terminal devices,
An action information acquisition unit that receives the disaster information indicating the occurrence of the disaster and acquires the action information from a local storage device that stores the action information related to the action at the time of the disaster; and
A behavior information distribution unit that informs each wireless terminal device of the behavior information acquired by the behavior information acquisition unit;
The behavior information acquisition unit selects a part or all of the behavior information stored in the local storage device,
The behavior information distribution unit notifies the wireless terminal device of the behavior information selected by the behavior information acquisition unit,
The behavior information acquisition unit selects the type of behavior information according to the elapsed time since receiving the disaster information ,
The information distribution device is connected to a management device via a network, relays communication between the wireless terminal device and the management device,
The management device is connected to a network-side storage device that stores behavior information related to behavior at the time of disaster occurrence,
The wireless terminal device requests the information distribution device to provide the behavior information,
The information distribution device acquires the behavior information from the local storage device and transmits the behavior information to the wireless terminal device, or notifies the management device of the request content of the wireless terminal device,
The management device acquires the behavior information corresponding to the request content notified from the information distribution device from the network-side storage device, and transmits the acquired behavior information to the information distribution device,
The information distribution device transmits the behavior information received from the management device to the wireless terminal device,
The information distribution device, even if the behavior information corresponding to the request content notified from the wireless terminal device exists in the local storage device, when the update time of the behavior information in the local storage device is old, An information distribution device for notifying the management device of the request content of a wireless terminal device. A communication control method in an information distribution apparatus capable of communicating with one or a plurality of wireless terminal apparatuses,
The information distribution device is connected to a management device via a network, relays communication between the wireless terminal device and the management device,
The management device is connected to a network-side storage device that stores behavior information related to behavior at the time of disaster occurrence,
Receiving the disaster information indicating the occurrence of the disaster and acquiring the behavior information from a local storage device that stores the behavior information regarding the behavior at the time of the disaster; and
Notifying each wireless terminal device of the acquired behavior information,
In the step of acquiring the behavior information, a part or all of the behavior information stored in the local storage device is selected,
In the step of notifying the behavior information, the selected behavior information is notified to each wireless terminal device,
In the step of acquiring the behavior information, the behavior information of a type corresponding to an elapsed time after receiving the disaster information is selected ,
further,
Receiving a request for provision of the behavior information from the wireless terminal device;
Obtaining the behavior information requested from the wireless terminal device;
Transmitting the behavior information requested from the wireless terminal device to the wireless terminal device,
In the step of obtaining the behavior information requested from the wireless terminal device, the requested behavior information is obtained from the local storage device or the request content of the wireless terminal device is notified to the management device,
The management device acquires the behavior information corresponding to the request content notified from the information distribution device from the network-side storage device, and transmits the acquired behavior information to the information distribution device,
In the step of transmitting the requested behavior information to the wireless terminal device, the behavior information received from the management device is transmitted to the wireless terminal device,
In the step of acquiring the requested behavior information, even if the behavior information corresponding to the request content notified from the wireless terminal device exists in the local storage device, the behavior information in the local storage device A communication control method for notifying the management device of the request content of the wireless terminal device when the update time of the wireless terminal device is old .

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