JP2015171069A - Base station monitoring device, communication system, control method for base station device, communication method, and program - Google Patents

Abstract

A mobile station device located in a communication area of a base station device that has become unable to communicate can receive emergency information without a user moving.
A base station monitoring device (20), when the number of communicable base station devices (10) adjacent to a base station device (10) that has become incapable of communication is equal to or greater than a predetermined number, The information to be distributed to the communication area A of the device 10 is determined to be transmitted to the adjacent communicable base station device 10.
[Selection] Figure 1

Description

  The present invention relates to a base station monitoring apparatus, a communication system, a control method for a base station apparatus, a communication method, and a program.

  There is a service in which the base station device of the communication system broadcasts various emergency information such as disaster / evacuation information provided by the national or local government or disaster prevention weather information distributed by the Japan Meteorological Agency to mobile station devices in the target area. Is provided.

Patent Document 1 discloses that a mobile station apparatus receives emergency information from a base station apparatus and a broadcast station apparatus.
Further, Patent Document 2 discloses guidance information that a mobile station device guides to a communication area of a communicable base station device when a disaster such as an earthquake occurs and a wireless base station malfunctions. Techniques for receiving from an apparatus are disclosed.

Patent Document 3 discloses a technique for receiving channel selection information necessary for a mobile station apparatus to receive digital terrestrial broadcasting and position information of the mobile station apparatus via a wireless communication network.
Patent Document 4 discloses a technology in which a mobile station apparatus seamlessly switches between receiving digital broadcasts from a broadcast station apparatus and receiving digital broadcasts from a broadcast apparatus connected via a femto base station apparatus.
Patent Document 5 discloses a technique in which a plurality of base station devices cooperate to transmit a signal to a mobile station device.

JP 2011-176541 A JP 2012-213064 A JP 2004-282350 A JP 2010-035035 A JP 2013-1887591 A

When the base station apparatus becomes unable to communicate due to a disaster or the like, the communication system cannot distribute emergency information to the mobile station apparatus by the above-described service. By using the technique described in Patent Document 2, it is possible to guide the user of the mobile station apparatus to a place where emergency information can be distributed. However, since the mobile station apparatus cannot receive emergency information unless the user moves, reception of emergency information is delayed.
An object of the present invention is to provide a base station monitoring apparatus, a communication system, a base station apparatus control method, a communication method, and a program that solve the above-described problems.

  In the first aspect, when the number of communicable base station devices adjacent to the base station device that cannot communicate is greater than or equal to a predetermined number, the communication is performed to the communication area of the base station device that cannot communicate The base station monitoring apparatus includes a transmission source determination unit that determines to transmit information to be transmitted to the adjacent communicable base station apparatus.

  In addition, in the second aspect, when the number of communicable base station devices adjacent to the base station device that cannot communicate is equal to or greater than a predetermined number, the communication area of the base station device that cannot communicate The base station apparatus control method includes a transmission source determination step for determining that information to be distributed is transmitted to the communicable base station apparatus.

  In addition, in the third aspect, when the number of communicable base station devices adjacent to the base station device incapable of communicating is equal to or more than a predetermined number, the base station device incapable of communicating It is a program for functioning as a transmission source determination unit that determines that information to be distributed to a communication area is transmitted to the communicable base station apparatus.

  Further, the fourth aspect includes a plurality of base station devices, and when the number of communicable base station devices adjacent to the base station device that cannot communicate is a predetermined number or more, This is a communication system in which the adjacent base station apparatus capable of communication transmits information to be distributed to the communication area of the base station apparatus that has become impossible.

  Further, the fifth aspect is a communication method using a plurality of base station apparatuses, and the number of communicable base station apparatuses adjacent to the base station apparatus that cannot communicate is a predetermined number or more. In this case, the communication method includes a distribution information transmission step in which the communicable base station apparatus transmits information to be distributed to the communication area of the base station apparatus that has become unable to communicate.

  According to at least one of the above aspects, a mobile station apparatus located in a communication area of a base station apparatus that has become unable to communicate can receive emergency information even if the user does not move.

1 is a schematic diagram of a communication system according to a first embodiment. It is a figure which shows the example of emergency information. It is a schematic block diagram which shows the structure of the communication system which concerns on 1st Embodiment. It is a flowchart which shows operation | movement of the communication system which concerns on 1st Embodiment. It is a schematic block diagram which shows the structure of the communication system which concerns on 2nd Embodiment. It is a figure which shows the example of cooperation base station information. It is a schematic block diagram which shows the basic composition of a base station monitoring apparatus. It is a schematic block diagram which shows the structure of the computer which concerns on at least 1 embodiment.

<< First Embodiment >>
Hereinafter, the first embodiment will be described in detail with reference to the drawings.
FIG. 1 is a schematic diagram of a communication system 1 according to the first embodiment.
The communication system 1 includes a plurality of base station devices 10 and a base station monitoring device 20 that monitors the base station devices 10. The base station device 10 and the base station monitoring device 20 are connected by wire or wireless (for example, ad hoc communication using direct communication between base stations).
Each base station apparatus 10 communicates with a mobile station apparatus M existing in the communication area A of the own apparatus. Note that the communication area A of the base station apparatus 10 has a portion that overlaps with the communication area A of the other base station apparatus 10. Hereinafter, another base station apparatus 10 having an overlapping communication area A is referred to as an adjacent base station apparatus 10.
The base station monitoring device 20 monitors whether each base station device 10 can communicate. Moreover, the base station monitoring apparatus 20 acquires emergency information corresponding to the communication area A of each base station apparatus 10 and transmits the emergency information to the corresponding base station apparatus 10 or broadcast station apparatus B when a disaster or the like occurs. To do. As an example of the base station monitoring apparatus 20, MME (Mobile Management Entity) etc. are mentioned, for example.
Note that the mobile station apparatus M that communicates with the base station apparatus 10 can receive the broadcast signal transmitted from the broadcast station apparatus B in addition to the communication signal transmitted from the base station apparatus 10.

  The base station monitoring apparatus 20 according to the present embodiment transmits emergency information to be distributed to the communication area A of the base station apparatus 10 to the communicable base station apparatus 10 when a disaster or the like occurs. Thereby, the base station apparatus 10 can transmit emergency information to the mobile station apparatus M present in the communication area A of the base station apparatus 10. On the other hand, when there is a base station apparatus 10 that has become unable to communicate when a disaster or the like occurs, the base station monitoring apparatus 20 can communicate with the base station apparatus 10 (hereinafter referred to as a cooperative base station) adjacent to the base station apparatus 10. Emergency information to be distributed to the communication area A of the base station apparatus 10 that has become unable to communicate is transmitted to the broadcast station apparatus B. Thereby, the coordinated base station apparatus or the broadcast station apparatus B can transmit emergency information to the mobile station apparatus M existing in the communication area A of the base station apparatus 10 that has become unable to communicate.

FIG. 2 is a diagram illustrating an example of emergency information.
FIG. 2A is an example of disaster area information indicating a place where a disaster has occurred. The disaster area information is information in which the place name, GPS (Global Positioning System) position information of the base station device 10 and the radius of the communication area A of the base station device 10 are associated with each other. The base station monitoring device 20 specifies the base station device 10 to which emergency information should be transmitted based on the disaster area information. FIG. 2B is an example of evacuation site information indicating an evacuation site for each district. The evacuation place information is information in which the place name, the evacuation place, and the GPS position information of the evacuation place are associated with each other. The base station monitoring device 20 transmits, to the base station device 10 specified based on the stricken area information, the evacuation site of the district associated with the base station device 10 and its position information. FIG. 2C is an example of disaster information indicating a disaster situation for each district. The disaster information is information that associates the place name, the GPS position information of the base station device 10, the communication area A of the base station device 10, and the disaster situation (for example, water outage, power outage, fire, etc.) in the district. . The base station monitoring device 20 transmits the disaster status of the district associated with the base station device 10 to the base station device 10 specified based on the disaster area information. The disaster area information, evacuation area information, and disaster information are not limited to the information in FIG. The disaster area information may be information that can at least identify the position of the disaster area. The evacuation site information may be information that can identify at least the position of the evacuation site. The disaster information may be information that can at least identify the situation and position of the disaster.

FIG. 3 is a schematic block diagram showing the configuration of the communication system 1 according to the first embodiment.
The base station monitoring apparatus 20 includes a distribution information acquisition unit 21, a communication availability determination unit 22, a base station information storage unit 23, a transmission source determination unit 24, a distribution information transmission unit 25, and a base station information transmission unit 26.

The distribution information acquisition unit 21 acquires emergency information to be distributed to the communication area A of each base station device 10 when a disaster occurs.
The communication availability determination unit 22 determines whether each base station device 10 can communicate with each base station device 10.
The base station information storage unit 23 stores, for each base station device 10, the ID (Identification) of the base station device 10 and the ID of the base station device 10 adjacent to the base station device 10 in association with each other. In the present embodiment, the ID of the base station device 10 is an example of information required for communication with the base station device 10. The base station apparatus 10 generates and transmits BCH (Broadcast Channel) and RS (Reference Symbol) based on the ID. The BCH or RS may be a signal in which the ID information is multiplexed on a predetermined time or frequency resource, or the BCH or RS signal sequence may be a signal sequence determined in advance for each ID. good.

  The transmission source determination unit 24 determines an emergency information transmission source device based on the determination result of the communication availability determination unit 22. Specifically, the transmission source determination unit 24 sends the transmission source of emergency information to be distributed to the communication area A of the base station device 10 determined by the communication availability determination unit 22 to be communicable to the base station device 10. decide. Further, the transmission source determination unit 24 distributes to the communication area A of the base station devices 10 that the communication availability determination unit 22 has determined that communication is not possible, but the number of adjacent base station devices 10 that can communicate with each other is two or more. The transmission source of emergency information to be determined is determined to be a communicable base station apparatus 10 (cooperative base station apparatus) adjacent to the base station apparatus 10. Further, the transmission source determination unit 24 distributes to the communication area A of the base station devices 10 that the communication availability determination unit 22 has determined that communication is not possible but the number of adjacent base station devices 10 that can be communicated is less than two. The broadcast station apparatus B is determined as a source of emergency information to be transmitted.

The distribution information transmission unit 25 transmits the emergency information acquired by the distribution information acquisition unit 21 to the device determined by the transmission source determination unit 24.
When the device determined by the transmission source determination unit 24 is a cooperative base station device, the base station information transmission unit 26 has information about the base station device 10 that has become unable to communicate with the communication area A to which emergency information is to be distributed. Send.

The base station apparatus 10 includes a distribution information receiving unit 11, an adjacent base station information receiving unit 12, an adjacent base station information storage unit 13, and a distribution unit 14.
The distribution information receiving unit 11 receives emergency information to be transmitted from the base station monitoring device 20.
The adjacent base station information receiving unit 12 receives information of the adjacent base station apparatus 10 that has become unable to communicate from the base station monitoring apparatus 20.
The adjacent base station information storage unit 13 stores information on the base station apparatus 10 received by the adjacent base station information reception unit 12.

  The distribution unit 14 transmits the emergency information received by the distribution information receiving unit 11 to the mobile station apparatus M. When the distribution information receiving unit 11 receives emergency information to be distributed to the communication area A of the adjacent base station device 10 from the base station monitoring device 20, the distribution unit 14 stores information stored in the base station information storage unit 23. Send emergency information based on. That is, the distribution unit 14 transmits emergency information to be distributed to the communication area A of the base station device 10 using the BCH and RS of the base station device 10 that has become incapable of communication with each other.

Next, the operation of the communication system 1 according to the present embodiment will be described.
FIG. 4 is a flowchart showing the operation of the communication system 1 according to the first embodiment.
When the distribution information acquisition unit 21 of the base station monitoring device 20 acquires emergency information, the communication availability determination unit 22 determines whether communication of each base station device 10 is possible (step S1). The transmission source determination unit 24 selects the base station devices 10 that have determined whether or not communication is possible one by one, and executes the processes of steps S3 to S9 described below (step S2).

  The transmission source determination unit 24 determines whether or not the communication availability determination unit 22 determines that communication is possible for the base station device 10 selected in step S2 (step S3). If the transmission source determination unit 24 determines that the base station device 10 selected in step S2 can communicate (step S3: YES), the transmission source determination unit 24 determines the base station device 10 as a transmission source of emergency information. The distribution information transmitting unit 25 transmits emergency information to be distributed to the communication area A of the base station device 10 to the base station device 10 selected in step S2 (step S4).

  Thereby, the distribution information receiving unit 11 of the base station device 10 receives the distribution information from the base station device 10. And the delivery part 14 transmits the received emergency information using BCH and RS determined by ID of an own apparatus.

  On the other hand, if the transmission source determination unit 24 determines that the base station device 10 selected in step S2 is incapable of communication (step S3: NO), the transmission source determination unit 24 sends the base station device 10 to the base station device 10 from the base station information storage unit 23. The adjacent base station apparatus 10 is specified (step S5). Based on the determination result of the communication availability determination unit 22, the transmission source determination unit 24 determines whether or not the number of communicable adjacent base station devices 10 is 2 or more (step S6). .

  When determining that the number of communicable base station apparatuses 10 adjacent to the base station apparatus 10 selected in step S2 is two or more (step S6: YES), the transmission source determining unit 24 is able to communicate. The adjacent base station apparatus 10 (cooperative base station apparatus) is determined as the emergency information transmission source. The distribution information transmitting unit 25 transmits emergency information to be distributed to the communication area A of the base station device 10 selected in step S2 to the cooperative base station device (step S7). In addition, the base station information transmitting unit 26 transmits the ID of the base station device 10 selected in step S2 to the cooperative base station device (step S8).

Thereby, the distribution information receiving unit 11 of the coordinated base station apparatus receives emergency information to be distributed from the base station monitoring apparatus 20 to the communication area A of the adjacent base station apparatus 10. Further, the adjacent base station information receiving unit 12 receives the ID of the adjacent base station device 10 from the base station monitoring device 20 and records it in the adjacent base station information storage unit 13. And the delivery part 14 transmits the emergency information which the delivery information receiving part 11 received using BCH and RS determined by ID which the adjacent base station information storage part 13 memorize | stores. The cooperative base station apparatus not only transmits the emergency information transmitted in step S7 to the communication area A of the adjacent base station apparatus 10, but also transmits the emergency information transmitted in step S4 to the communication area A of the own apparatus. Send. In this case, the coordinated base station apparatus divides the communication band and allocates the divided communication band to transmission of emergency information to each communication area A. For example, when the total communication band of the coordinated base station apparatus is 20 MHz, 10 MHz is used for communication in the communication area A of the own apparatus, and the remaining 10 MHz is used for communication in the communication area A of the adjacent base station apparatus 10. The base station monitoring apparatus 20 includes information corresponding to at least one of a communication band used for communication in the communication area A of the base station apparatus 10 and a communication band used for communication in the communication area A of the adjacent base station apparatus 10. You may notify to the base station apparatus 10 as communication band designation | designated information. Based on the communication band designation information notified from the base station monitoring apparatus 20, the base station apparatus 10 uses the band used for communication in the communication area A of its own apparatus and the communication in the communication area A of the adjacent base station apparatus 10. The bandwidth may be determined or may be determined for each base station apparatus 10 in advance.
When the cooperative base station device transmits BCH and RS corresponding to the ID of the adjacent base station device 10, the distribution unit 14 sets its own device ID to CCH (Control Channel), DCH (Data Channel). ) Or higher layer signaling (for example, RRC signaling), the mobile station apparatus M can be notified of the ID of the own apparatus. In this case, the coordinated base station device may notify the mobile station device M that the device is performing coordinated communication through BCH, CCH, DCH, or higher layer signaling.

  As described above, according to the present embodiment, the communication system 1 cannot perform communication when the number of communicable base station devices 10 adjacent to the base station device 10 that cannot communicate is two or more. The information to be distributed to the communication area A of the base station device 10 is transmitted to the adjacent base station device 10 (cooperative base station device) capable of communication. Thereby, emergency information can be received even if the user who is in the communication area A of the base station apparatus 10 that has become unable to communicate does not move.

  Moreover, the cooperative base station apparatus according to the present embodiment transmits emergency information using the ID of the base station apparatus 10 that has become unable to communicate. Since the number of cooperative base station devices is two or more, a plurality of cooperative base station devices transmit emergency information using the same ID. Thereby, the communication system 1 which concerns on this embodiment can improve the diversity effect by a some cooperation base station apparatus.

  On the other hand, when the transmission source determination unit 24 determines that the number of communicable base station apparatuses 10 adjacent to the base station apparatus 10 selected in step S2 is less than 2 (step S6: NO), broadcast The station apparatus B is determined as the emergency information transmission source. The distribution information transmitting unit 25 transmits emergency information to be distributed to the communication area A of the base station device 10 selected in step S2 to the broadcast station device B (step S9).

  Thereby, the broadcast station apparatus B receives emergency information to be distributed from the base station apparatus 10 to the communication area A of the adjacent base station apparatus 10. And the broadcasting station apparatus B transmits the received emergency information via a broadcast wave.

  When the processing of step S3 to step S9 is performed for all the base station devices 10 for which the communication availability determination unit 22 has determined whether communication is possible, the base station monitoring device 20 has passed a certain period of time from the transmission of emergency information. Whether or not (step S10). When the base station monitoring apparatus 20 determines that the predetermined time has not elapsed (step S10: NO), the base station monitoring apparatus 20 repeatedly executes the determination of step S10. On the other hand, if the base station monitoring device 20 determines that a certain time has elapsed (step S10: YES), the base station monitoring device 20 returns to step S1 and again determines whether or not each base station device 10 can communicate.

  As described above, according to the present embodiment, the communication system 1 becomes incapable of communication when the number of base station apparatuses 10 that can communicate with each other adjacent to the base station apparatus 10 that has become incapable of communication is less than two. The information to be distributed to the communication area A of the base station apparatus 10 is transmitted to the broadcast station apparatus B. Thereby, emergency information can be received even if the user who is in the communication area A of the base station apparatus 10 that has become unable to communicate does not move.

  Note that as a related form, the communication system 1 is connected to the base station device 10 that has become incapable of communication, regardless of the number of base station devices 10 that can communicate with each other. One that allows the broadcast station apparatus B to transmit information to be distributed to the communication area A is conceivable. Also in this case, the emergency information can be received even if the user who is in the communication area A of the base station apparatus 10 that has become unable to communicate does not move. On the other hand, if information that should be distributed to the communication area A of all base station information that has become incapable of communication is transmitted to the broadcast station apparatus B, the amount of information transmitted by the broadcast station apparatus B increases and the transmission bandwidth is insufficient. there's a possibility that. In particular, when a large-scale disaster occurs, many base station apparatuses 10 may be unable to communicate. On the other hand, the communication system 1 according to the present embodiment is limited to the case where the number of communicable base station devices 10 adjacent to the base station device 10 that has become unable to communicate is less than 2, the broadcasting station device B Emergency information is transmitted from the other base station, and other emergency information is transmitted to the cooperative base station apparatus. Thereby, the amount of information transmitted to the broadcasting station apparatus B can be suppressed.

<< Second Embodiment >>
Next, a second embodiment will be described.
In the communication system 1 according to the first embodiment, the cooperative base station apparatus transmits emergency information using the ID of the adjacent base station apparatus 10 that has become unable to communicate. On the other hand, in the communication system 1 according to the second embodiment, the cooperative base station apparatus transmits emergency information using the ID of the own apparatus.

FIG. 5 is a schematic block diagram illustrating a configuration of the communication system 1 according to the second embodiment.
The base station apparatus 10 according to the second embodiment does not include the adjacent base station information receiving unit 12 and the adjacent base station information storage unit 13. Further, the operations of the distribution unit 14 of the base station device 10 and the base station information transmission unit 26 of the base station monitoring device 20 are different from those of the first embodiment.

The distribution unit 14 of the base station device 10 transmits information to be distributed to the communication area A of the base station device 10 that has become unable to communicate using the ID of the own device.
The base station information transmission unit 26 of the base station monitoring device 20 enables the mobile station device M present in the communication area A of the base station device 10 that has become unable to communicate to communicate with the cooperative base station device. The upper coordinated base station information is transmitted to the broadcasting station apparatus B.
FIG. 6 is a diagram illustrating an example of cooperative base station information. The coordinated base station information is information that associates the place name of the cover area, the ID of the base station device 10 that has become unable to communicate, the ID of the coordinated base station device, and the carrier frequency and frequency band of the coordinated base station device. It is. Instead of the place name of the cover area, position information such as GPS for specifying the cover area, or position information indicating the center position of the cover area and information indicating the radius of the cover area may be used.
The broadcast station apparatus B that has received the coordinated base station information multiplexes the coordinated base station information with the broadcast wave and transmits it.

  The mobile station apparatus M that has received the coordinated base station information from the broadcast station apparatus B is in a state where the current received electric field strength is equal to or less than a threshold value (dead zone), and the base station apparatus 10 that has communicated last is the coordinated base station. When matching with the base station apparatus 10 or the coordinated base station apparatus that has become incapable of communication included in the station information, it communicates with the coordinated base station apparatus and receives emergency information.

  The mobile station apparatus M that has received the coordinated base station information from the broadcast station apparatus B is in a state where the current received electric field strength is equal to or less than a threshold value (dead zone), and the current position is included in the coordinated base station information. When the communication is within the communication area A of the base station apparatus 10 or the coordinated base station apparatus that has become unable to communicate, it communicates with the coordinated base station apparatus and receives emergency information. Note that the mobile station apparatus M identifies the current position based on, for example, GPS measurement values. In this case, the broadcast station apparatus B needs to notify the mobile station apparatus M of information indicating the correspondence relationship between the base station apparatus 10 and the communication area A in advance. As an example of the information indicating the correspondence relationship between the base station device 10 and the communication area A, there is information in which the ID of the base station device 10, the position of the base station device 10, and the radius of the communication area A are associated.

  Thus, according to the present embodiment, the base station monitoring device 20 causes the broadcast station device B to transmit information required for communication with the cooperative base station device. Thereby, the cooperation base station apparatus can transmit the information which should be delivered to the area of the base station apparatus 10 where communication became impossible, without changing ID.

As described above, the embodiment has been described in detail with reference to the drawings. However, the specific configuration is not limited to that described above, and various design changes and the like can be made.
For example, the base station monitoring apparatus 20 according to the above-described embodiment performs the determination of whether the base station apparatus 10 can communicate and the determination of the transmission source of emergency information, but is not limited thereto. For example, in another embodiment, another device determines whether or not the base station device 10 can communicate, and the base station monitoring device 20 determines the transmission source of emergency information based on the determination result acquired from the other device. Also good.

  In addition, the base station monitoring device 20 according to the above-described embodiment makes the communication impossible when the number of communicable base station devices 10 adjacent to the base station device 10 that cannot communicate is two or more. Although it is determined that the information to be distributed to the communication area A of the base station apparatus 10 that has become to be transmitted to the cooperative base station apparatus, the present invention is not limited thereto. For example, the base station monitoring apparatus 20 according to another embodiment may use 1 as a threshold value for the number of adjacent base station apparatuses 10 that can communicate with each other, or may use a value of 3 or more.

  Moreover, although the information which should be delivered to the communication area A of the base station apparatus 10 which concerns on embodiment mentioned above was emergency information, it is not restricted to this.

<Basic configuration>
FIG. 7 is a schematic block diagram showing the basic configuration of the base station monitoring apparatus 20.
In the above-described embodiment, the configuration illustrated in FIG. 3 and FIG. 5 has been described as an embodiment of the base station monitoring device 20, but the basic configuration of the base station monitoring device 20 is as illustrated in FIG.
That is, the base station monitoring apparatus 20 is basically provided with a transmission source determination unit 24.

When the number of communicable base station devices 10 adjacent to the base station device 10 that has become incapable of communication is equal to or greater than a predetermined number, the transmission source determination unit 24 communicates with the base station device 10 that has become incapable of communication. Information to be distributed to area A is determined to be transmitted to the adjacent communicable base station apparatus 10 (cooperative base station apparatus).
As a result, the base station monitoring device 20 can cause the mobile station device M located in the communication area A of the base station device 10 that has become unable to communicate to receive emergency information even if the user has not moved. .

FIG. 8 is a schematic block diagram illustrating a configuration of a computer 900 according to at least one embodiment.
The computer 900 includes a CPU 901, a main storage device 902, an auxiliary storage device 903, and an interface 904.
The base station monitoring apparatus 20 described above is implemented in the computer 900. The operation of each processing unit described above is stored in the auxiliary storage device 903 in the form of a program. The CPU 901 reads a program from the auxiliary storage device 903, develops it in the main storage device 902, and executes the above processing according to the program. In addition, information stored in the base station information storage unit 23 is recorded in the auxiliary storage device 903 in advance.

  In at least one embodiment, the auxiliary storage device 903 is an example of a tangible medium that is not temporary. Other examples of the tangible medium that is not temporary include a magnetic disk, a magneto-optical disk, and a semiconductor memory connected through the interface 904. When this program is distributed to the computer 900 via a communication line, the computer 900 that has received the distribution may develop the program in the main storage device 902 and execute the above processing.

  The program may be for realizing a part of the functions described above. Further, the program may be a so-called difference file (difference program) that realizes the above-described function in combination with another program already stored in the auxiliary storage device 903.

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1)
When the number of communicable base station devices adjacent to the base station device that cannot communicate is less than a predetermined number, information to be distributed to the communication area of the base station device that cannot communicate A base station monitoring apparatus comprising: a transmission source determination unit that determines transmission to the apparatus.

  DESCRIPTION OF SYMBOLS 1 ... Communication system 10 ... Base station apparatus 11 ... Distribution information receiving part 12 ... Adjacent base station information receiving part 13 ... Adjacent base station information storage part 14 ... Distribution part 20 ... Base station monitoring apparatus 21 ... Distribution information acquisition part 22 ... Communication Availability determination unit 23 ... base station information storage unit 24 ... transmission source determination unit 25 ... distribution information transmission unit 26 ... base station information transmission unit B ... broadcast station apparatus M ... mobile station apparatus A ... communication area 900 ... computer 901 ... CPU 902 ... Main storage device 903 ... Auxiliary storage device 904 ... Interface

Claims (10)

When the number of communicable base station devices adjacent to the base station device that has become incapable of communication is a predetermined number or more, information to be distributed to the communication area of the base station device that has become incommunicable A base station monitoring apparatus comprising: a transmission source determination unit that determines transmission to a communicable base station apparatus. When the number of communicable base station devices adjacent to the base station device is less than a predetermined number, the transmission source determination unit is to distribute information to be communicated to the communication area of the base station device that has become unable to communicate. The base station monitoring apparatus according to claim 1, wherein the base station monitoring apparatus determines to be transmitted to a broadcast station apparatus. When the transmission source determination unit determines to transmit information to be distributed to the communication area of the base station apparatus that has become incapable of communication to the adjacent base station apparatus capable of communication, the communication becomes impossible. The base station monitoring apparatus according to claim 1, further comprising: a base station information transmission unit configured to transmit information necessary for communication with the base station apparatus to the adjacent communicable base station apparatus. When the transmission source determination unit determines to transmit information to be distributed to the communication area of the base station apparatus that has become incapable of communication to the adjacent base station apparatus capable of communication, the communication becomes impossible. The base station information transmitting unit according to claim 1 or 2, further comprising: a base station information transmitting unit that associates the identification information of the base station apparatus and information necessary for communication with the adjacent communicable base station apparatus and transmits the information to the broadcast station apparatus. Base station monitoring equipment. When the number of communicable base station devices adjacent to the base station device that has become unable to communicate is a predetermined number or more, information that should be distributed to the communication area of the base station device that has become incommunicable A control method for a base station apparatus, comprising: a transmission source determination step for determining transmission to a possible base station apparatus. Computer
When the number of communicable base station devices adjacent to the base station device that has become unable to communicate is a predetermined number or more, information that should be distributed to the communication area of the base station device that has become incommunicable A program for functioning as a transmission source determination unit that determines transmission to a possible base station apparatus. A plurality of base station devices,
If the number of communicable base station devices adjacent to the base station device that cannot communicate is equal to or greater than a predetermined number, information to be distributed to the communication area of the base station device that has become incapable of communication Is transmitted by the adjacent communicable base station apparatus. The adjacent base station apparatus capable of communication transmits information to be distributed to a communication area of the base station apparatus incapable of communication using identification information of the base station apparatus incapable of communication. Item 8. The communication system according to Item 7. The communication system according to claim 7, further comprising a base station monitoring device that causes a broadcast station device to transmit information required for communication with a communicable base station device adjacent to the base station device that has become unable to communicate. A communication method using a plurality of base station devices,
If the number of communicable base station devices adjacent to the base station device that cannot communicate is equal to or greater than a predetermined number, information to be distributed to the communication area of the base station device that has become incapable of communication A communication information transmission step in which the communicable base station device transmits the communication information.

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