JP6146803B2 - Wireless communication system, gateway device, and communication control method - Google Patents

Description

  The present invention relates to a wireless communication system, a gateway device, and a communication control method, and more particularly to a wireless communication system, a gateway device, 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, a situation where a communication failure occurs in the network is also conceivable. In this case, it becomes difficult for the user to connect to the network, and information cannot be acquired smoothly.

  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, a gateway device, 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, a network-side storage device connected to the management device, and storing behavior information related to actions at the time of occurrence of a disaster. One or a plurality of gateway devices connected to the management device via a network and one or more gateway devices that relay communication between the networks, and connected to the gateway device, and an action related to an action when a disaster occurs A local storage device for storing information, wherein the gateway device receives disaster information indicating the occurrence of a disaster, acquires the behavior information from the local storage device, and acquires the acquired behavior information for each of the wireless terminal devices And the network storage device stores the behavior information stored in the local storage device. Comprising an update unit for synchronizing with the action information are.

  (8) In order to solve the above-described problem, a gateway device according to an aspect of the present invention is connected via a network to a management device to which a network-side storage device that stores behavior information regarding behavior at the time of a disaster is connected. A gateway device that is connected to a local storage device that stores behavior information related to behavior at the time of disaster occurrence and relays communication between one or a plurality of wireless terminal devices and the network, and receives disaster information indicating the occurrence of the disaster A behavior information acquisition unit that acquires the behavior information from the local storage device, a behavior information distribution unit that notifies the wireless terminal device of the behavior information acquired by the behavior information acquisition unit, and the local storage device An updating unit that synchronizes the behavior information stored by the network with the behavior information stored in the network-side storage device; Provided.

  (9) In order to solve the above-described problem, a communication control method according to an 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. One or a plurality of gateway devices connected to the management device via a network and one or more gateway devices that relay communication between the networks, and connected to the gateway device, and an action related to an action when a disaster occurs A communication control method in a wireless communication system including a local storage device that stores information, wherein the gateway device receives disaster information indicating the occurrence of a disaster, acquires the behavior information from the local storage device, and acquires the behavior information Informing each wireless terminal device of the action information, and before storing the local storage device The action information and the step of synchronizing with said action information network storage device has stored.

  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 radio communication system according to an embodiment of the present invention. FIG. 2 is a diagram showing distribution of behavior information by the wireless communication system according to the embodiment of the present invention. FIG. 3 is a diagram showing an example of a usage pattern in the normal time of the wireless communication system according to the embodiment of the present invention. FIG. 4 is a diagram showing information acquisition by the wireless terminal device in the wireless communication system according to the embodiment of the present invention. FIG. 5 is a diagram illustrating updating of the local database by the wireless communication system according to the embodiment of the present invention. FIG. 6 is a diagram showing a configuration of the gateway device in the wireless communication system according to the embodiment of the present invention. FIG. 7 is a diagram showing a configuration of a management apparatus in the wireless communication system according to the embodiment of the present invention. FIG. 8 is a flowchart defining an operation procedure when the gateway device according to the embodiment of the present invention receives downlink information. FIG. 9 is a flowchart defining an operation procedure when the management apparatus according to the embodiment of the present invention distributes information. FIG. 10 is a diagram showing an example of an information distribution sequence in the wireless communication system according to the embodiment of the present invention. FIG. 11 is a diagram showing an example of an information distribution sequence in the wireless communication system according to the 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, a network-side storage device connected to the management device, and storing behavior information related to actions at the time of occurrence of a disaster. One or a plurality of gateway devices connected to the management device via a network and one or more gateway devices that relay communication between the networks, and connected to the gateway device, and an action related to an action when a disaster occurs A local storage device for storing information, wherein the gateway device receives disaster information indicating the occurrence of a disaster, acquires the behavior information from the local storage device, and acquires the acquired behavior information for each of the wireless terminal devices And the network storage device stores the behavior information stored in the local storage device. Comprising an update unit for synchronizing with the action information are.

  With such a configuration, the local database of the local storage device can be synchronized with the database of the network side storage device, and the information of the local database can be updated in advance. Even when it becomes difficult to connect to the network, new and useful information can be distributed to the wireless terminal device. That is, it is possible to provide a wireless communication system with high information transmission performance when each user can acquire appropriate information at the time of the disaster, regardless of the network communication failure after the disaster occurs. . 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 local storage device stores a part of the behavior information stored in the network-side storage device, and the update unit stores the behavior information stored in the local storage device in the network. Synchronize with a part of the behavior information stored in the side storage device.

  As described above, efficient data update and data can be achieved by a configuration that selectively synchronizes with the behavior information corresponding to each gateway device from a wide range of behavior information in the wireless communication system stored in the network-side storage device. Management can be realized.

  (3) More preferably, the update unit includes the local information connected to the gateway device in the behavior information corresponding to the position of the gateway device among the behavior information stored in the network side storage device. The behavior information stored in the storage device is synchronized.

  In this way, by selectively synchronizing with the behavior information corresponding to the position of the gateway device, it is possible to select behavior information suitable for the installation area of the gateway device and realize efficient data update and data management. it can.

  (4) Preferably, the said update part is the said action information which the said network side memory | storage device has memorize | stored the said action information which the said local storage device memorize | stores in the step before the said gateway apparatus receives the said disaster information Synchronize with.

  As described above, the configuration in which data is updated from the normal time distributes new and useful information to the wireless terminal device even when a communication failure occurs in the network immediately after the disaster occurs and it becomes difficult to connect to the network. be able to.

  (5) Preferably, the said update part is the said behavior information which the said network side memory | storage device has memorize | stored the said behavior information which the said local storage device memorize | stores in the step after the said gateway apparatus receives the said disaster information Synchronize with.

  In this way, the configuration that updates data even after a disaster has occurred, and even if a communication failure occurs in the network after a certain amount of time has elapsed after the disaster occurs, it becomes more new and useful. Information can be distributed to the wireless terminal device.

  (6) More preferably, the update unit stores the behavior information stored in the local storage device at the stage before the gateway apparatus receives the disaster information and the stage after the disaster information is received. Synchronizing with the behavior information stored in the side storage device, the update frequency of the behavior information at the stage after receiving the disaster information is increased compared to the stage before receiving the disaster information.

  With such a configuration, new and useful information can be distributed to the wireless terminal device after a disaster that requires the latest and diverse information compared to before the disaster occurs.

  (7) Preferably, after the behavior information is notified, the gateway device unicasts the notified behavior information to the activated wireless terminal device when the wireless terminal device is activated.

  With such a configuration, even more useful information is provided to users of wireless terminal devices that could not receive the behavior information due to reasons such as the power being turned off when the gateway device notified the behavior information. can do.

  (8) In order to solve the above-described problem, a gateway device according to an aspect of the present invention is connected via a network to a management device to which a network-side storage device that stores behavior information regarding behavior at the time of a disaster is connected. A gateway device that is connected to a local storage device that stores behavior information related to behavior at the time of disaster occurrence and relays communication between one or a plurality of wireless terminal devices and the network, and receives disaster information indicating the occurrence of the disaster A behavior information acquisition unit that acquires the behavior information from the local storage device, a behavior information distribution unit that notifies the wireless terminal device of the behavior information acquired by the behavior information acquisition unit, and the local storage device An updating unit that synchronizes the behavior information stored by the network with the behavior information stored in the network-side storage device; Provided.

  With such a configuration, the local database of the local storage device can be synchronized with the database of the network side storage device, and the information of the local database can be updated in advance. Even when it becomes difficult to connect to the network, new and useful information can be distributed to the wireless terminal device. That is, it is possible to provide a wireless communication system with high information transmission performance when each user can acquire appropriate information at the time of the disaster, regardless of the network communication failure after the disaster occurs. . 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.

  (9) In order to solve the above-described problem, a communication control method according to an 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. One or a plurality of gateway devices connected to the management device via a network and one or more gateway devices that relay communication between the networks, and connected to the gateway device, and an action related to an action when a disaster occurs A communication control method in a wireless communication system including a local storage device that stores information, wherein the gateway device receives disaster information indicating the occurrence of a disaster, acquires the behavior information from the local storage device, and acquires the behavior information Informing each wireless terminal device of the action information, and before storing the local storage device The action information and the step of synchronizing with said action information network storage device has stored.

  With such a configuration, the local database of the local storage device can be synchronized with the database of the network side storage device, and the information of the local database can be updated in advance. Even when it becomes difficult to connect to the network, new and useful information can be distributed to the wireless terminal device. That is, it is possible to provide a wireless communication system with high information transmission performance when each user can acquire appropriate information at the time of the disaster, regardless of the network communication failure after the disaster occurs. . 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 radio communication system according to an embodiment of the present invention.

  With reference to FIG. 1, the wireless communication system 301 includes a management device 101, a storage device 151, one or more gateway devices 111, and one or more storage devices 121. The management apparatus 101 may include a storage device 151. Further, the gateway device 111 may include a storage device 121. Further, the wireless communication system 301 may include a plurality of management devices 101 or a plurality of storage devices 151. In FIG. 1, the wireless communication system 301 includes two sets of the gateway device 111 and the storage device 121, but may have a configuration including one set or three or more sets.

  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 network 251. The gateway device 111 is wired or wirelessly connected to the network 251.

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

  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 the gateway device 111.

  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.

  The storage device 121 is connected to the gateway device 111 and stores a local database of the behavior information. For example, the storage device 121 stores part of the behavior information stored in the storage device 151. In this case, the data amount of the local database in the storage device 121 is smaller than the data amount of the database in the storage device 151.

  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 showing distribution of behavior information by the wireless communication system according to the embodiment of the present invention.

  With reference to FIG. 2, the gateway device 111 receives disaster information indicating the occurrence of a disaster, acquires behavior information from the storage device 121, and each wireless terminal device 202 wirelessly connected to the acquired behavior information. To inform. The gateway device 111 receives disaster information indicating the occurrence of a disaster from the management device 101, for example.

  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.

  FIG. 3 is a diagram showing an example of a usage pattern in the normal time of the wireless communication system according to the 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 showing information acquisition by the wireless terminal device in the wireless communication system according to the embodiment of the present invention.

  Referring to FIG. 4, gateway device 111 receives an information request from wireless terminal device 202, and acquires behavior information indicated by the information request from a local database in storage device 121. Then, the gateway device 111 unicasts the acquired behavior information to the wireless terminal device 202.

  As described above, the gateway device 111 can perform both push type information distribution and pull type information distribution.

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

  FIG. 5 is a diagram illustrating updating of the local database by the wireless communication system according to the embodiment of the present invention.

  Referring to FIG. 5, management device 101 and gateway device 111 transmit the update information from management device 101 to gateway device 111, thereby periodically or irregularly changing the local database of storage device 121 to the database of storage device 151. And update the local database information.

  Specifically, for example, when the management device 101 receives new sensor information from the sensor 161, the database of the storage device 151 is updated and the local database of the storage device 121 is also updated.

  FIG. 6 is a diagram showing a configuration of the gateway device in the wireless communication system according to the embodiment of the present invention.

  Referring to FIG. 6, gateway device 111 includes behavior information acquisition unit 21, behavior information distribution unit 22, and database update unit 24.

  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 local database of 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.

  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 database update unit 24 synchronizes the local database of the storage device 121 with the database of the storage device 151 regularly or irregularly, and updates the information in the local database. For example, the database update unit 24 transmits an update information request to the management apparatus 101 regularly or irregularly. The database update unit 24 updates the local database in the storage device 121 based on the update information received from the management device 101.

  More specifically, the database update unit 24 synchronizes the behavior information stored in the storage device 121 with part of the behavior information stored in the storage device 151.

  For example, the database update unit 24 stores, in the behavior information stored in the storage device 151, the behavior information corresponding to the position of the gateway device 111 of the storage device 121 connected to the gateway device 111 of the database. Synchronize behavior information.

  Specifically, when the location information is included in the update information from the management device 101, the database update unit 24 is the same as the location of its own gateway device 111 from the update information received from the management device 101. Alternatively, information on an area including the position of the gateway device 111 is selected. Then, the database update unit 24 updates the local database in the storage device 121 based on the selected information.

  As a method of acquiring the position information of the gateway device 111, for example, the gateway device 111 acquires the position information of the wireless terminal device 202 in the mobile communication system such as LTE, or the wireless terminal device 202 using GPS or the position information of itself. Is possible.

  FIG. 7 is a diagram showing a configuration of a management apparatus in the wireless communication system according to the embodiment of the present invention.

  Referring to FIG. 7, management apparatus 101 includes an update information transmission unit 11 and a database update unit 14.

  The database update unit 14 updates the database of the storage device 151 based on the sensor information received from the sensor 161. Further, the database update unit 14 synchronizes the behavior information stored in the storage device 121 with the behavior information stored in the storage device 151. Specifically, the database update unit 14 receives an update information request from the gateway device 111, refers to the storage device 151, and creates update information for the database in the storage device 151.

  The update information transmission unit 11 transmits the update information created by the database update unit 14 to the gateway device 111 that is the transmission source of the update information request.

  More specifically, the database update unit 14 synchronizes the behavior information stored in the storage device 121 with a part of the behavior information stored in the storage device 151.

  For example, the database update unit 14 adds the behavior information stored in the storage device 121 connected to the gateway device 111 to the behavior information corresponding to the position of the gateway device 111 among the behavior information stored in the storage device 151. Synchronize.

  Specifically, the database update unit 14 is the same as the location of the gateway device 111 that is the transmission source of the update information request, or the area that includes the location of the gateway device 111 in the database of the storage device 151. Select information. Then, the database update unit 14 creates update information based on the selected information.

  For example, action information such as food, electricity and gas is selected for the gateway device 111 located in the disaster-affected center area. In addition, information such as traffic information and a neighborhood map is selected for the gateway device 111 located in an area somewhat distant from the disaster center.

  In addition, when the gateway apparatus 111 selects the action information corresponding to its own position from the update information as in the example described with reference to FIG. 6, the database update unit 14 in the management apparatus 101 performs the selection process as described above. What is necessary is just to create the update information which included position information in various action information, and to transmit to the wireless terminal device 202, without performing.

  Further, the database update unit 14 may be configured to select behavior information corresponding to the ID of the gateway device 111. In this case, the management apparatus 101 holds information indicating the correspondence between the ID of the gateway apparatus 111 and the position of the gateway apparatus 111.

[Operation]
Next, information distribution by the wireless communication system according to the 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. 8 is a flowchart defining an operation procedure when the gateway device according to the embodiment of the present invention receives downlink information.

  Referring to FIG. 8, first, gateway apparatus 111 receives data from network 251 (YES in step S1), and performs a process of determining the received data (step S2).

  When the received data is information to be stored in the local database from the management apparatus 101 such as update information (YES in step S2), the gateway device 111 updates the local database based on the received data (step S3). ).

  On the other hand, when the received data is information that does not need to be stored in the local database from the management apparatus 101, such as information for Web browsing by the user of the wireless terminal apparatus 202, the gateway apparatus 111 (NO in step S2). The received data is transmitted to the wireless terminal device 202 (step S4).

  FIG. 9 is a flowchart defining an operation procedure when the management apparatus according to the embodiment of the present invention distributes information.

  For example, the database update units 14 and 24 synchronize the behavior information stored in the storage device 121 with the behavior information stored in the storage device 151 before the gateway device 111 receives the disaster information.

  For example, the database update units 14 and 24 synchronize the behavior information stored in the storage device 121 with the behavior information stored in the storage device 151 in a stage after the gateway device 111 receives the disaster information.

  In addition, for example, in the database update units 14 and 24, the storage device 151 stores the behavior information stored in the storage device 121 in the stage before the gateway apparatus 111 receives the disaster information and the stage after receiving the disaster information. The behavior information is updated more frequently in the stage after receiving the disaster information than in the stage before receiving the disaster information.

  Specifically, referring to FIG. 9, first, gateway device 111 performs synchronization processing of the local database in storage device 121 in the normal mode in which disaster information is not received (NO in step S51). More specifically, the gateway device 111 periodically transmits an update information request to the management device 101, for example, and receives update information for the update information request from the management device 101, whereby the local database of the storage device 121 is stored in the storage device 121. The information in the local database is updated in synchronization with the database 151 (step S52).

  Next, when the gateway device 111 receives disaster information from the management device 101 (YES in step S51), the gateway device 111 transitions from the normal mode to the broadcast mode, and acquires distribution information from the local database of the storage device 121. Here, the distribution information includes at least action information (step S53).

  Next, the gateway device 111 broadcasts the acquired distribution information to the wireless terminal device 202 (step S54).

  Next, the gateway device 111 transitions from the broadcast mode to the unicast mode. Specifically, the gateway device 111 first sets a transmission cycle of the update information request to be shorter than that in the normal mode (step S55).

  Next, the gateway device 111 transmits an update information request to the gateway device 111 at a newly set cycle, and receives the update information for the update information request from the gateway device 111, whereby the local database of the storage device 121 is stored in the storage device 121. The information in the local database is updated in synchronization with the database 151 (step S56).

  Next, when the gateway device 111 receives an information request from the wireless terminal device 202 (YES in step S57), the gateway device 111 acquires distribution information corresponding to the information request from the local database (step S58), and sends the information to the wireless terminal device 202. Unicast (step S59).

  The gateway device 111 continues to perform database synchronization processing (step S56).

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

  Referring to FIG. 10, first, gateway apparatus 111 transmits an update information request to management apparatus 101 in a state where disaster information has not been received. For example, since the database of the storage device 151 has not been updated, the management apparatus 101 does not transmit update information for the update information request to the gateway apparatus 111 (step S11).

  Next, the sensor 161 transmits sensor information to the management apparatus 101, for example, when a new measurement result is obtained (step S12).

  Next, the management apparatus 101 receives new sensor information from the sensor 161, and updates the database of the storage device 151 based on the content of the sensor information (step S13).

  Next, the gateway device 111 transmits an update information request to the management device 101 (step S14).

  Next, the management apparatus 101 receives the update information request from the gateway apparatus 111, and updates the database based on the updated database contents since the database of the storage device 151 is updated after receiving the previous update information request. Information is created and the created update information is transmitted to the gateway device 111 (step S15).

  Next, the gateway device 111 updates the local database in the storage device 121 based on the update information received from the management device 101 (step S16).

  In a state where such operations are repeated, when a disaster detection device (not shown) detects the occurrence of a disaster (step S17), it transmits disaster information to the management device 101 (step S18).

  Next, the management apparatus 101 transmits the disaster information received from the disaster detection apparatus to the gateway apparatus 111 (step S19).

  Next, the gateway device 111 receives disaster information from the management device 101, acquires distribution information from the local database of the storage device 121, and broadcasts it to the wireless terminal device 202 (step S20).

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

  Referring to FIG. 11, first, gateway apparatus 111 transmits an update information request to management apparatus 101 in a state where disaster information has not been received (step S31). For example, the gateway apparatus 111 transmits an update information request to the management apparatus 101 when a predetermined time Tp has elapsed since the previous update information request was transmitted (step S32).

  In a state where such operations are repeated, when a disaster detection device (not shown) detects the occurrence of a disaster (step S33), it transmits disaster information to the management device 101 (step S34).

  Next, the management apparatus 101 transmits the disaster information received from the disaster detection apparatus to the gateway apparatus 111 (step S35).

  Next, the gateway device 111 receives disaster information from the management device 101, acquires distribution information from the local database in the storage device 121, and broadcasts it to the wireless terminal device 202 (step S36).

  Next, the gateway device 111 continues to transmit the update information request to the management device 101 even after receiving the disaster information (step S37). For example, the gateway apparatus 111 transmits an update information request to the management apparatus 101 when a predetermined time Ta has elapsed since the previous update information request was transmitted (step S38). Here, Ta <Tp. That is, the gateway device 111 sets the update period of the local database after the disaster occurrence to be shorter than that before the disaster occurrence.

  Next, the sensor 161 transmits sensor information to the management apparatus 101, for example, when a new measurement result is obtained (step S39).

  Next, the management apparatus 101 receives new sensor information from the sensor 161, and updates the database of the storage device 151 based on the content of the sensor information (step S40).

  Next, the gateway apparatus 111 transmits an update information request to the management apparatus 101 when a predetermined time Ta has elapsed since the previous update information request was transmitted (step S41).

  Next, the management apparatus 101 receives the update information request from the gateway apparatus 111, and updates the database based on the updated database contents since the database of the storage device 151 is updated after receiving the previous update information request. Information is created, and the created update information is transmitted to the gateway device 111 (step S42).

  Next, the gateway device 111 updates the local database in the storage device 121 based on the update information received from the management device 101 (step S43).

  Thereafter, the gateway device 111 transmits an update information request to the management device 101 at intervals of the predetermined time Ta (steps S44 and S45).

  In a state where the update process of the local database is continuously performed, the wireless terminal device 202 transmits an information request indicating that a distribution of certain information is requested to the gateway device 111 (step S46).

  Next, when receiving the information request from the wireless terminal device 202, the gateway device 111 acquires distribution information corresponding to the information request from the local database, and unicasts to the wireless terminal device 202 (step S47).

  Here, when the wireless terminal device 202 is activated after the behavior information is notified, the gateway device 111 may unicast the notified behavior information to the activated wireless terminal device 202. The “activated wireless terminal device 202” is the wireless terminal device 202 that has never received the notified behavior information, or has received the notified behavior information. The wireless terminal device 202 is restarted.

  Specifically, when a certain wireless terminal device 202 is activated in a state where the database update process is continuously performed (step S48), various information is transmitted and received between the wireless terminal device 202 and the gateway device 111. As a result, communication connection between the wireless terminal device 202 and the gateway device 111 is established (step S49).

  When the communication connection with the wireless terminal device 202 is established, the gateway device 111 acquires the broadcast distribution information from the local database and unicasts it to the wireless terminal device 202 (step S50).

  Note that the gateway device 111 transmits the update information request to the gateway device 111 as described above, so that the gateway device 111 is not limited to the configuration in which the gateway device 111 actively updates the local database. The structure which updates may be sufficient. Specifically, for example, the database update unit 14 in the management apparatus 101 transmits update information to each gateway apparatus 111 for several hours or once a day. The database update unit 24 in the gateway device 111 updates the local database in the storage device 121 based on the update information received from the management device 101.

  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, a situation where a communication failure occurs in the network is also conceivable. In this case, it becomes difficult for the user to connect to the network, and information cannot be acquired smoothly.

  On the other hand, in the wireless communication system according to the 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. The gateway device 111 is connected to the management device 101 via the network 251 and relays communication between one or a plurality of wireless terminal devices 202 and the network 251. The storage device 121 is connected to the gateway device 111 and stores behavior information related to behavior at the time of disaster occurrence. 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. Then, the database update unit in the gateway device 111 or the management device 101 synchronizes the behavior information stored in the storage device 121 with the behavior information stored in the storage device 151.

  In the gateway device according to the embodiment of the present invention, the behavior information acquisition unit 21 receives disaster information indicating the occurrence of a disaster and acquires the behavior information from the storage device 121. The behavior information distribution unit 22 notifies the wireless terminal device 202 of the behavior information acquired by the behavior information acquisition unit 21. Then, the database update unit 24 synchronizes the behavior information stored in the storage device 121 with the behavior information stored in the storage device 151.

  With such a configuration, the local database in the storage device 121 can be synchronized with the database in the storage device 151, and information in the local database can be updated in advance. Even when it becomes difficult to connect to the wireless terminal device 202, new and useful information can be distributed to the wireless terminal device 202. That is, it is possible to provide a wireless communication system with high information transmission performance when each user can acquire appropriate information at the time of the disaster, regardless of the network communication failure after the disaster occurs. .

  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 gateway device according to the 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 embodiment of the present invention, storage device 121 stores a part of the behavior information stored in storage device 151. Then, the database update units 14 and 24 synchronize the behavior information stored in the storage device 121 with a part of the behavior information stored in the storage device 151.

  As described above, the configuration in which the behavior information corresponding to each gateway device 111 is selectively synchronized from the wide range of behavior information in the wireless communication system 301 stored in the storage device 151 on the network side is efficient. Data update and data management can be realized.

  Further, in the wireless communication system according to the embodiment of the present invention, the database updating units 14 and 24 include the gateway information in the behavior information stored in the storage device 151 and corresponding to the location of the gateway device 111. The behavior information stored in the storage device 121 connected to the device 111 is synchronized.

  As described above, the behavior information corresponding to the location of the gateway device 111 is selectively synchronized with the behavior information corresponding to the installation area of the gateway device 111, thereby realizing efficient data update and data management. be able to.

  In the wireless communication system according to the embodiment of the present invention, the database update units 14 and 24 have the storage device 151 store the behavior information stored in the storage device 121 before the gateway device 111 receives the disaster information. Synchronize with memorized action information.

  In this way, with the configuration in which data is updated from normal time, new and useful information is distributed to the wireless terminal device 202 even when a communication failure occurs in the network immediately after the disaster occurs and it becomes difficult to connect to the network. can do.

  In the wireless communication system according to the embodiment of the present invention, the database update units 14 and 24 have the storage device 151 store the behavior information stored in the storage device 121 at a stage after the gateway device 111 receives the disaster information. Synchronize with memorized action information.

  In this way, the configuration that updates data even after a disaster has occurred, and even if a communication failure occurs in the network after a certain amount of time has elapsed after the disaster occurs, it becomes more new and useful. Such information can be distributed to the wireless terminal device 202.

  Further, in the wireless communication system according to the embodiment of the present invention, the database update units 14 and 24 have the storage device 121 in the stage before the gateway apparatus 111 receives the disaster information and the stage after the disaster information is received. The behavior information to be stored is synchronized with the behavior information stored in the storage device 151, and the update frequency of the behavior information at the stage after receiving the disaster information is increased compared to the stage before the disaster information is received.

  With such a configuration, new and useful information can be distributed to the wireless terminal device 202 after the occurrence of a disaster that requires the latest and diverse information compared to before the occurrence of the disaster.

  In the wireless communication system according to the embodiment of the present invention, when the wireless terminal device 202 is activated after the behavior information is notified, the gateway device 111 transmits the notified behavior information to the activated wireless terminal device 202. Cast.

  With such a configuration, more useful information for the user of the wireless terminal device 202 that could not receive the behavior information because the power was turned off when the gateway device 111 notified the behavior information. Can be provided.

  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.

DESCRIPTION OF SYMBOLS 11 Update information transmission part 14 Database update part 21 Behavior information acquisition part 22 Behavior information distribution part 24 Database update part 101 Management apparatus 111 Gateway apparatus 121,151 Storage apparatus 161 Sensor 202 Wireless terminal apparatus 251 Network 301 Wireless communication system

Claims (6)

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;
One or more gateway devices connected to the management device via a network and relaying communication between the one or more wireless terminal devices and the network;
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,
further,
E Bei update unit for synchronizing with the said action information which the said action information local storage device stores a network storage device has stored,
In the stage before the gateway device receives the disaster information and the stage after the disaster information is received, the update unit stores the behavior information stored in the local storage device in the network side storage device. A wireless communication system that synchronizes with the behavior information and increases the update frequency of the behavior information at a stage after receiving the disaster information as compared with a stage before receiving the disaster information . The local storage device stores a part of the behavior information stored in the network-side storage device,
The wireless communication system according to claim 1, wherein the updating unit synchronizes the behavior information stored in the local storage device with a part of the behavior information stored in the network-side storage device.   The update unit stores the behavior stored in the local storage device connected to the gateway device in the behavior information corresponding to the location of the gateway device among the behavior information stored in the network-side storage device. The wireless communication system according to claim 2, wherein information is synchronized. The gateway device, after notifying the action information, when you start the wireless terminal device, a notification to said action information, and unicast to the wireless terminal device starts, any of claims 1 to 3 The wireless communication system according to item 1. One or more connected to a management device to which a network-side storage device that stores behavior information related to behavior at the time of a disaster is connected, and a local storage device that stores behavior information related to behavior at the time of a disaster. A gateway device that relays communication between the wireless terminal device and the network,
A behavior information acquisition unit that receives disaster information indicating a disaster occurrence and acquires the behavior information from the local storage device;
A behavior information distribution unit that notifies the wireless terminal device of the behavior information acquired by the behavior information acquisition unit;
E Bei an updating unit for synchronizing with the action information which the local storage device wherein the action information the network storage device for storing has stored,
In the stage before the gateway device receives the disaster information and the stage after the disaster information is received, the update unit stores the behavior information stored in the local storage device in the network side storage device. A gateway device that synchronizes with the behavior information and increases the update frequency of the behavior information at a stage after receiving the disaster information as compared with a stage before receiving the disaster information . A management device, a network-side storage device connected to the management device and storing behavior information relating to behavior at the time of a disaster, and connected to the management device via a network, between one or a plurality of wireless terminal devices and the network A communication control method in a wireless communication system, comprising one or a plurality of gateway devices that relay communication, and a local storage device that is connected to the gateway device and stores behavior information related to behavior at the time of a disaster,
The gateway device receiving disaster information indicating the occurrence of a disaster, acquiring the behavior information from the local storage device, and notifying the wireless terminal device of the acquired behavior information;
Look including the step of synchronizing with the action information which the local storage device the network storage device to the action information stored in the stores,
In the step of synchronizing the behavior information, the network device stores the behavior information stored in the local storage device in a step before the gateway device receives the disaster information and a step after the disaster information is received. The communication control method which synchronizes with the action information which the apparatus has memorize | stored and increases the update frequency of the action information in the stage after receiving the disaster information compared with the stage before receiving the disaster information .

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