JP5647699B2 - Base station system, mobile base station, server apparatus, mobile base station control method, update method, and computer program - Google Patents

Description

  The present invention relates to a technique for forming a communication area in a predetermined area range using a mobile base station.

  Conventionally, there is a concern that communication means in a disaster area may be disrupted if a communication infrastructure fails when a large-scale disaster such as an earthquake or tsunami occurs. If communication methods are disrupted in the disaster-stricken area, it is impossible to exchange important information such as confirmation of the safety of victims, communication between rescuers, and accurate distribution of damage information from the disaster-stricken area. It is necessary to recover. Conventionally, in the event that an incommunicable area has occurred over a wide area due to a disaster, the recovery headquarters centrally manages in which area the incommunicable area has occurred, so that the location of the incommunicable area has occurred. To the mobile base station and applied to the Ministry of Internal Affairs and Communications for permission to radiate communication radio waves from the mobile base station. The mobile base station, after receiving a notification from the Ministry of Internal Affairs and Communications that the permission has been granted from the recovery headquarters, radiates communication radio waves and tries to temporarily restore the communication network.

  However, the range where the communication radio waves actually reach from the mobile base station is affected by the situation of the disaster area (topography, radio wave environment, etc.), and therefore does not necessarily match the calculation results on the desk of the recovery countermeasures headquarters. In addition to these errors, it is difficult for the recovery headquarters to accurately and in real time understand the area of the incommunicable area due to miscommunication due to confusion in the disaster area and incorrect information communication. Even if a mobile base station rushes to an area designated by the countermeasures headquarters, the communication area may be temporarily restored in that area, and it is difficult to quickly and accurately temporarily restore the communication area.

  The error between the range where the communication radio waves actually reach from the mobile base station and the calculation result on the desk is not limited to the case where the communication area is formed in the disaster area. For example, an event using a plurality of mobile base stations This can also occur when a communication area is formed at the venue.

  Accordingly, the present invention has an object to reduce an error between a range in which communication radio waves actually reach from a mobile base station and a calculation result on a desk, and to quickly and accurately form a communication area within a predetermined area range. And

  In order to solve the above-described problems, a base station system according to the present invention includes a plurality of mobile base stations and a server device connected to each of the plurality of mobile base stations via a relay line. The server device includes notification means for notifying each of a plurality of mobile base stations of location information of a part of a region where it is expected that a communication area is not formed within a predetermined region range. Each of the plurality of mobile base stations has a measurement means for measuring radio waves to determine whether or not a communication area is formed in a part of the area broadcast from the server device, and a broadcast notification from the server device. Notification means for notifying the server device of information on whether or not a communication area is formed in the area of the department. An update unit for updating position information of a part of a region where a communication area is expected not to be formed in a predetermined region range based on information notified from each of a plurality of mobile base stations Is provided. Based on the actual radio wave measurement result by the mobile base station, the communication radio wave is actually transmitted from the mobile base station by updating the location information of a part of the area where the communication area is not expected to be formed. The error between the reachable range and the calculation result on the desk can be reduced. In addition, each mobile base station forms a communication area by notifying each mobile base station of the location information of a part of the area where it is expected that no communication area is formed in the area range. It is possible to share the location information of some areas that are not expected. Thereby, it can avoid that a mobile base station moves to the one part area where the communication area is formed accidentally.

  Each of the plurality of mobile base stations may form its own communication area in the partial area when the communication area is not formed in the partial area notified by the server apparatus.

  Whether each of the plurality of mobile base stations has a communication area formed in a part of the area where broadcast notification is made from the server device until a plurality of communication areas are formed almost entirely without gaps in a predetermined area range. A process for measuring radio waves, a process for notifying the server apparatus of information on whether or not a communication area is formed in a part of the area where the broadcast is notified from the server apparatus, and a part for the broadcast notification from the server apparatus If the communication area is not formed in this area, the process of forming the communication area of the local station in some areas may be repeated. A communication area can be quickly and reliably formed in the entire area by cooperation of a plurality of mobile base stations.

  The base station system according to the present invention electronically applies to the Ministry of Internal Affairs and Communications for permission to form a communication area in a part of the area before each of the plurality of mobile base stations forms a communication area in the part of the area. You may further provide the application server apparatus for this. By automating the application for permission to the Ministry of Internal Affairs and Communications and omitting manpower, a communication area can be formed quickly and reliably.

  The predetermined area range is, for example, a disaster area in which a communication area is formed by at least one fixed base station before the disaster. According to the base station system of the present invention, the communication infrastructure in the disaster area can be quickly and accurately restored.

  The mobile base station according to the present invention includes a receiving unit for receiving position information of a part of a region where a communication area is not formed in a predetermined region range from the server device, and a part of the received part Measuring means for measuring radio waves whether or not a communication area is formed in the area; and transmitting means for transmitting information about whether or not a communication area is formed in a part of the received area to the server device; .

  A server apparatus according to the present invention includes a transmission unit for transmitting position information of a part of a region where a communication area is expected not to be formed in a predetermined region range to each of a plurality of mobile base stations. Receiving means for receiving information on whether or not a communication area is formed in a certain area from each of a plurality of mobile base stations, and no communication area is formed within a predetermined area range based on the received information Updating means for updating the location information of a part of the region that is expected to be.

  The mobile base station control method according to the present invention receives position information of a part of a region where a communication area is not formed within a predetermined region range from the server device, Radio waves are measured whether or not a communication area is formed, and information on whether or not a communication area is formed in a part of the received area is transmitted to the server device.

  The update method according to the present invention transmits position information of a part of a region where a communication area is expected not to be formed in a predetermined region range to each of a plurality of mobile base stations, and communicates to a part of the region. Information on whether or not an area is formed is received from each of a plurality of mobile base stations. Based on the received information, information on a part of a region where a communication area is expected not to be formed within a predetermined area range Update location information.

  The computer program according to the present invention is a computer program for causing a mobile base station to execute the mobile base station control method according to the present invention.

  A computer program according to another aspect of the present invention is a computer program for causing a server device to execute the update method according to the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the error of the range where the communication radio wave actually arrives from a mobile base station and the calculation result on a desk can be reduced, and a communication area can be rapidly and accurately formed in a predetermined area range.

It is a block diagram which shows the structure of the base station system concerning this embodiment. It is explanatory drawing which shows the formation process of the communication area concerning this embodiment. It is a flowchart describing the flow of processing of the mobile base station according to the present embodiment. It is a flowchart which describes the flow of a process of the server apparatus concerning this embodiment. It is a flowchart which describes the flow of a process of the application server apparatus concerning this embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram illustrating a configuration of a base station system 100 according to the first embodiment. The base station system 100 includes a plurality of mobile base stations 10 and a server device 30 for managing the arrangement of each of the plurality of mobile base stations 10. Each mobile base station 10 performs satellite communication between the mobile base station 10 and the server device 30, and a radio processing unit 11 for processing radio signals exchanged with mobile stations located in the mobile station. Satellite communication unit 16, a mobile unit 17 that is a mechanism for the mobile base station 10 to move on the ground, and a control unit 15 that controls each unit of the mobile base station 10. The wireless processing unit 11 includes an antenna 12, a transmission / reception unit 13 for transmitting / receiving communication radio waves to / from a mobile device via the antenna 12, and a measurement unit 14 for measuring the strength of the communication radio waves. As an example of the mobile base station 10, for example, a vehicle equipped with a base station for mobile communication can be cited.

  The core network 20, which is a mobile communication backbone network, manages the arrangement of each of the plurality of mobile base stations 10, the satellite communication device 40 connected to each of the plurality of mobile base stations 10 via the satellite relay line, and the plurality of mobile base stations 10. And the application server device 50 that applies to the Ministry of Internal Affairs and Communications 70 via the Internet network 60 for permission to form a communication area prior to the formation of the communication area by the mobile base station 10. The server device 30 includes a communication interface 31 connected to the satellite communication device 40, a database 33 for registering position information of a part of a region where a communication area is expected not to be formed within a predetermined region range, and the server device The control part 32 which controls each part of 30 is provided.

  FIG. 2 is an explanatory diagram illustrating a process of forming a communication area according to the first embodiment. Reference numeral 400 indicates a predetermined area range where a plurality of mobile base stations 10 are scheduled to form a communication area. The area range 400 is, for example, a disaster area in which a communication area is formed by at least one fixed base station before the disaster. Reference numeral 200 indicates a part of the area 400 in which the communication area is formed by the mobile base station 10, and reference numeral 300 indicates a part of the area 400 in which the communication area is not yet formed. Indicates the region. The server device 30 holds and manages position information of a part of the region 300 that is expected to have no communication area in the region range 400, and the position information of the region 300 is transmitted to each mobile base station 10 by a satellite. Broadcast notification via the line. Each mobile base station 10 that has received the location information of the region 300 moves to the region 300 and uses the measuring unit 14 to measure whether or not a communication area is formed in the region 300. Each mobile base station 10 notifies the server device 30 and the application server device 50 of information on whether or not a communication area is formed in the region 300. The server device 30 updates the position information of a part of the region 300 that is expected to have no communication area in the region range 400 based on information notified from each of the plurality of mobile base stations 10. Based on the actual radio wave measurement result by the mobile base station 10, communication is performed from the mobile base station 10 by updating the position information of a part of the region 300 that is expected not to be formed in the region range 400. It is possible to reduce an error between a range where radio waves actually reach and a calculation result on a desk. In particular, there are cases where the propagation environment of radio waves has changed due to topographical deformation or the like in the stricken area, and it is difficult to accurately determine the range in which communication radio waves from the mobile base station 10 have arrived by calculation on the desk. However, the cooperation between the mobile base station 10 and the server device 30 can eliminate such difficulties. In addition, each mobile base station 10 can notify each mobile base station 10 of the location information of a part of the region 300 that is not expected to have a communication area in the regional range 400 by broadcasting. , It is possible to share the position information of a part of the region 300 that is expected to have no communication area. Thereby, it can avoid that the mobile base station 10 moves to the some area 200 in which the communication area is formed accidentally.

  The application server device 50 receives information on whether or not a communication area is formed in the area 300 from each mobile base station 10 via a satellite line, and determines whether or not a communication area is formed in the area 300. When the communication area is not formed in the region 300, the application server device 50 sets the communication area to some of the regions 300 prior to the formation of the communication area to the some region 300 by each of the plurality of mobile base stations 10. Apply electronically to the Ministry of Internal Affairs and Communications 70 for permission to form a communication area. When permission for radio wave emission is received from the Ministry of Internal Affairs and Communications, the application server device 50 transmits a permission notice to each mobile base station 10. Each mobile base station 10 forms a communication area in the region 300 when receiving a radio wave emission permission notification from the application server 50.

  Each mobile base station 10 determines whether or not communication areas are formed in some areas 300 that are broadcasted from the server device 30 until a plurality of communication areas are formed in the entire area range 400 with almost no gap. A process of measuring radio waves, a process of notifying the server device 30 of information on whether or not a communication area is formed in the region 300, and a part of the region when the communication area is not formed in the part of the region 300 The process of forming the communication area of the own station in 300 is repeated.

  FIG. 3 is a flowchart describing the processing flow of the mobile base station 10 according to the first embodiment. When the mobile base station 10 receives position information of a part of the region 300 that is not expected to have a communication area in the region 400 from the server device 30 via the satellite line (step 301; YES), the mobile base station 10 It moves to the area 300 while confirming the current position using a positioning system or the like (step 302). The mobile base station 10 measures the radio wave whether or not a communication area is formed in the area 300 (step 303), and sends information about whether or not a communication area is formed in the area 300 to the server device 30 via a satellite line. Notification is made (step 304). Here, when the communication area is not formed in the area 300 (step 305; YES), the mobile base station 10 waits for reception of the radio wave emission permission notification from the application server 50 (step 306; YES). ) To radiate radio waves to form a communication area of the own station (step 307). On the other hand, when a communication area is formed in the region 300 (step 305; NO), the process returns to step 301. The control unit 15 of the mobile base station 10 includes a processor and a storage resource, and the processing of steps 301 to 307 is controlled by the processor executing a computer program stored in the storage resource.

  FIG. 4 is a flowchart describing the processing flow of the server device 30 according to the first embodiment. The server device 30 notifies each mobile base station 10 of the positional information of a part of the region 300 that is expected not to have a communication area in the region range 400 via the satellite line (step 401). When the server device 30 receives information on whether or not a communication area is formed in the region 300 from each mobile base station 10 via a satellite line (step 402; YES), the server device 30 is notified from each of the plurality of mobile base stations 10. Based on the information, the location information of a part of the region 300 that is expected not to be formed in the region range 400 is updated (step 403). Here, when a plurality of communication areas are formed almost entirely without gaps in the entire area range 400 (step 404; YES), the process ends. On the other hand, when the area 300 where the communication area is not formed remains in the area range 400 (step 404; NO), the process returns to step 401. The control unit 32 of the server device 30 includes a processor and storage resources, and the processing of steps 401 to 404 is controlled by the processor executing a computer program stored in the storage resources.

  FIG. 5 is a flowchart describing the flow of processing of the application server device 50 according to the first embodiment. When the application server device 50 receives information on whether or not a communication area is formed in the region 300 from each mobile base station 10 via a satellite line (step 501), whether or not a communication area is formed in the region 300. Is determined (step 502). When the communication area is not formed in the area 300 (step 502; YES), the application server device 50 sets the communication area to the area 300 before the mobile base station 10 forms the communication area to the area 300. An electronic application for permission of formation is made to the Ministry of Internal Affairs and Communications 70 (step 503). When permission for radio wave radiation is received from the Ministry of Internal Affairs and Communications 70 (step 504; YES), the application server device 50 transmits a radio wave radiation permission notification to the mobile base station 10 (step 505). The application server device 50 includes a processor and a storage resource, and the processing in steps 501 to 505 is controlled by the processor executing a computer program stored in the storage resource.

  In the above description, the disaster area is illustrated as an example of the area range 400, but the area range 400 may be an event venue where a plurality of mobile base stations 10 are scheduled to temporarily form communication areas, for example. . In this case, the application server device 50 may be omitted because the radio wave emission permission may be obtained in advance from the Ministry of Internal Affairs and Communications for the entire area range 400. Further, step 306 may be omitted from the processing performed by the mobile base station 10.

  According to the present embodiment, the server device 30 is based on the actual radio wave measurement result by the mobile base station 10, and the location information of a part of the region 300 where no communication area is expected in the region range 400. By updating, it is possible to reduce an error between a range in which communication radio waves are actually received from the mobile base station 10 and a calculation result on the desk. In addition, each mobile base station 10 can notify each mobile base station 10 of the location information of a part of the region 300 that is not expected to have a communication area in the regional range 400 by broadcasting. , It is possible to share the position information of a part of the region 300 that is expected to have no communication area. Thereby, it can avoid that the mobile base station 10 moves to the some area 200 in which the communication area is formed accidentally.

DESCRIPTION OF SYMBOLS 10 ... Mobile base station 11 ... Radio processing part 12 ... Antenna 13 ... Transmission / reception part 14 ... Measurement part 15 ... Control part 16 ... Satellite communication part 17 ... Mobile part 20 ... Core network 30 ... Server apparatus 31 ... Communication interface 32 ... Control part 33 ... Database 40 ... Satellite communication device 50 ... Application server 60 ... Internet network 70 ... Ministry of Internal Affairs and Communications 100 ... Base station system

Claims (11)

A base station system comprising a plurality of mobile base stations and a server device connected to each of the plurality of mobile base stations via a relay line,
The server device includes notification means for notifying each of the plurality of mobile base stations of location information of a part of a region where a communication area is expected not to be formed within a predetermined region range,
Each of the plurality of mobile base stations includes a measuring unit for measuring radio waves to determine whether a communication area is formed in the partial area broadcast from the server device, and a broadcast from the server device. A notification means for notifying the server device of information on whether or not a communication area is formed in the partial area to be notified;
The server device updates position information of a part of a region where a communication area is expected not to be formed in the predetermined region range based on the information notified from each of the plurality of mobile base stations. A base station system comprising updating means for The base station system according to claim 1,
Each of the plurality of mobile base stations forms a communication area of the local station in the partial area when the communication area is not formed in the partial area that is broadcast from the server device. Base station system. The base station system according to claim 2, wherein
Each of the plurality of mobile base stations forms a communication area in the partial area that is broadcasted from the server device until a plurality of communication areas are formed almost without gaps over the predetermined area range. A process for measuring whether or not a communication area is broadcast, a process for notifying the server apparatus of information on whether or not a communication area is formed in the part of the area that is broadcast from the server apparatus, and the server apparatus A base station system that repeats the process of forming the communication area of the local station in the partial area when the communication area is not formed in the partial area that is broadcasted from. The base station system according to claim 2, wherein
An application server device for electronically applying to the Ministry of Internal Affairs and Communications for permission to form a communication area in the partial area prior to formation of the communication area in the partial area by each of the plurality of mobile base stations A base station system. The base station system according to any one of claims 1 to 4,
The predetermined area range is a base station system in which a communication area is formed by at least one fixed base station before the disaster. A receiving means for receiving, from the server device, location information of a part of a region where a communication area is expected not to be formed in a predetermined region range;
Measuring means for measuring radio waves whether or not a communication area is formed in the received partial area;
Transmitting means for transmitting information indicating whether a communication area is formed in the received partial area to the server device;
A mobile base station comprising: A transmission means for transmitting position information of a part of a region where a communication area is expected not to be formed within a predetermined region range to each of a plurality of mobile base stations;
Receiving means for receiving information from each of the plurality of mobile base stations whether or not a communication area is formed in the partial area;
Updating means for updating the position information of a part of the region where it is expected that a communication area is not formed in the predetermined region range based on the received information;
A server device comprising: Receives location information from a server device that is expected to have no communication area within a given area,
Radio wave measurement whether or not a communication area is formed in the part of the received area,
A method for controlling a mobile base station, wherein information indicating whether a communication area is formed in the received partial area is transmitted to the server device. Send location information of a part of the area that is expected not to have a communication area within the predetermined area range to each of a plurality of mobile base stations,
Information on whether or not a communication area is formed in the partial area is received from each of the plurality of mobile base stations,
An update method for updating position information of a part of a region where a communication area is expected not to be formed in the predetermined region range based on the received information.   A computer program for causing a mobile base station to execute the mobile base station control method according to claim 8.   A computer program for causing a server device to execute the updating method according to claim 9.

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