JP6019825B2 - Communication control system, base station, communication control method, and communication control program - Google Patents

Description

  The present invention relates to a communication control system, a base station, a communication control method, and a communication control program that regulate communication.

  When a disaster occurs in a certain area, there is a risk that congestion will occur in the core network due to rapidly increasing traffic. If the system down of the core network occurs, all communication may be disabled. Therefore, in general, communication is restricted in order to prevent network congestion.

  As a general communication regulation technology, there are emergency communications such as No. 119, and a mechanism for preferentially controlling calls in units of individual communication terminals and subscribers registered in advance. FIG. 10 is a diagram illustrating a configuration of a general communication control system. In the communication control system shown in FIG. 10, the core network 100 including call control devices 140-1 to 140-2 for controlling calls, the base stations 120-1 to 120-3 covering the areas A to C, Communication terminals 130-1 to 130-n, 130-m, and 130-o (n, m, and o are natural numbers of 3 or more) communicating with the base stations 120-1 to 120-3 via a wireless communication network (not shown) Is provided.

  When communication restriction is necessary due to a disaster or the like, communication under the call control device is restricted. For example, when the call control devices 140-1 and 140-2 are subject to communication restriction, the communication terminals 130-1 to 130-n, 130-m, and 130-o located in the radio area of the subordinate base station 120 are used. Communication is regulated. According to the communication control system shown in FIG. 10, system down of the core network 100 can be prevented.

JP 2010-63049 A

  However, in the communication control system shown in FIG. 10, since communication under the control of the call control device is regulated at a certain rate, not only areas where disasters have not occurred but also disaster areas where communication demand is high are subject to communication regulation. It may become.

  Here, Patent Document 1 describes a communication control system that changes a communication restriction rate in each area in accordance with the CPU load of a communication station control device (base station control device 11). # 3 Although the invention described in Patent Document 1 enables communication restriction in units of area, there is a problem that all communication of subordinate base stations is restricted when a load is applied to the communication station control device.

  Therefore, an object of the present invention is to provide a communication control system, a base station, a communication control method, and a communication control program that can perform preferential communication in units of radio areas of the base station.

In order to achieve the above object, a communication control system according to the present invention is a communication control system including a base station connected to a communication terminal so as to be capable of wireless communication, and a call control device that performs control related to a call of the communication terminal. The base station is located in the wireless area of the local station when the priority control unit switches the setting of the local station to the priority control mode in which priority communication is possible, and the setting is switched to the priority control mode by the priority control unit. A request transmission unit that assigns a priority flag to a request transmitted from a communication terminal and transmits the request to the call control device, and the call control device prioritizes the request to which the priority flag is assigned according to the content of the priority flag. to be processed.

In order to achieve the above object, when the base station according to the present invention switches the setting of its own station to a priority control mode capable of priority communication, and the setting is switched to the priority control mode by the priority control unit. , obtain Preparations and request transmission section which grants priority flag to the request transmitted from the communication terminal located in a radio area of the own station and transmits to the call controller.

In order to achieve the above object, a communication control method according to the present invention includes a priority control step of switching a setting of the own station to a priority control mode in which priority communication is possible, and a priority of the setting of the base station in the priority control step. When the mode is switched to the control mode, a request transmission step in which the base station gives a priority flag to a request transmitted from a communication terminal located in the wireless area of the local station and transmits the request to the call control device, and the call control device, the request priority flag is assigned and a processing step of physical processing preferentially in accordance with the contents of the priority flag.

  According to the present invention, a communication control system, a base station, a communication control method, and a communication control program that can perform preferential communication in units of radio areas of a base station are provided.

It is a figure which shows the structure of the communication control system which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the communication control system which concerns on the 2nd Embodiment of this invention. FIG. 3 is a block diagram showing details of configurations of a base station control device 11, a base station 12, a call control device 14, and a subscriber management device 15 shown in FIG. It is a figure which shows an example of a structure of a subscriber information table. It is a sequence diagram which shows operation | movement of the communication control system at the time of mode change. It is a sequence diagram which shows the operation | movement at the time of the location registration request | requirement process in the base station 12 of priority control mode. It is a sequence diagram which shows the operation | movement at the time of the telephone call request process in the base station 12 of priority control mode. It is a sequence diagram which shows the operation | movement at the time of the telephone call request process with respect to the communication terminal 13 located in the radio | wireless area of the base station 12 in priority control mode. It is a sequence diagram which shows the operation | movement at the time of the mode change of the communication control system which concerns on the 3rd Embodiment of this invention. It is a figure which shows the structure of a general communication system.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. However, the following embodiments are merely examples of the present invention, and various configurations other than the following can also be adopted. In all the drawings, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted.

  Further, in the following description, the configuration of each device indicates a functional unit block instead of a hardware unit. The configuration of each device is centered on the CPU and memory of an arbitrary computer, a program for realizing the components shown in the figure loaded in the memory, a storage medium such as a hard disk for storing the program, and an interface for connecting to a network. It is realized by any combination of hardware and software. There are various modifications of the realization method and apparatus.

(First embodiment)
FIG. 1 is a diagram showing a configuration of a communication control system according to the first embodiment of the present invention. The communication control system shown in FIG. 1 includes a base station 12 connected to a communication terminal 13 so as to be able to perform wireless communication, and a call control device 14 that performs control related to a call of the communication terminal 13.

  Base station 12 includes a priority control unit 121 and a request transmission unit 122. The priority control unit 121 switches the setting of the own station to a priority control mode in which priority communication is possible. When the setting is switched to the priority control mode by the priority control unit 121, the request transmission unit 122 gives a priority flag to a request transmitted from a communication terminal located in the wireless area of the local station and transmits the request to the call control device 14. To do. Here, the request is a location registration request or a call request.

  The call control device 14 preferentially processes the request to which the priority flag is assigned according to the content of the priority flag.

  As described above, according to the present embodiment, preferential communication can be performed in units of radio areas of the base station.

(Second Embodiment)
Next, a communication control system according to the second embodiment of the present invention will be described. FIG. 2 is a diagram showing a configuration of a communication control system according to the second embodiment of the present invention. In FIG. 2, the communication control system includes a base station control device 11, base stations 12-1 to 12-4, communication terminals 13-1 to 13-5, call control devices 14-1 to 14-2, Person management device 15. The base station control device 11 is connected to the base stations 12-1 to 12-4 via a wired communication network (not shown). The call control device 14-1 is connected to the base stations 12-1 and 12-2, and the call control device 14-2 is connected to the base stations 12-3 and 12-4 via a wired communication network (not shown).

  In FIG. 2, the communication terminals 13-1 and 13-2 are located in the radio area 17-1 of the base station 12-1 in the area 16a, and the communication terminal 13-3 is located in the radio area 17-2 of the base station 12-2. An example is shown in which the communication terminal 13-4 is located in the radio area 17-3 of the base station 12-3 and the communication terminal 13-5 is located in the radio area 17-4 of the base station 12-4 in the area 16b. .

  Hereinafter, when it is not necessary to distinguish between the base stations 12-1 to 12-4, the communication terminals 13-1 to 13-5, and the call control devices 14-1 to 14-2, the base station 12 and the communication terminal 13 respectively. These are collectively called the call control device 14. 2 shows an example of a configuration including four base stations 12, five communication terminals 13, two call control devices 14, one base station control device 11 and one subscriber management device 15. The number of each device is not limited to this.

  FIG. 3 is a block diagram showing details of the configurations of the base station control device 11, the base station 12, the call control device 14, and the subscriber management device 15 shown in FIG.

  The base station control device 11 is a maintenance server, for example, and controls the base station 12 and the communication terminal 13. The base station control device 11 includes a control unit 111. The control unit 111 generates a mode change request notification that instructs switching between the normal mode and the priority control mode, and transmits the mode change request notification to the base station 12.

  The base station 12 is, for example, a femtocell base station, a pico base station, or a macrocell base station, and performs processing according to the mode assigned to the own station. Base station 12 includes a priority control unit 121 and a request transmission unit 122.

  When receiving the mode change request notification from the base station control device 11, the priority control unit 121 switches the setting of the own station and notifies the request transmission unit 122 to that effect. When receiving the mode change notification, the priority control unit 121 switches to the priority control mode if the mode is the normal mode, and switches to the normal mode if the mode is the priority control mode. Here, the priority control mode is a mode in which processing such as outgoing and incoming calls and location registration can be performed with priority over communication in the normal mode.

  When the request transmission unit 122 receives a call request or a location registration request from a communication terminal in an area managed by the local station when the local station is set in the priority control mode, the request transmission unit 122 assigns a priority flag to the call control device 14. Send to. The priority flag is information indicating that a request is prioritized over other requests to which no priority flag is assigned. On the other hand, when the setting of the local station is in the normal mode, the request transmission unit 122 proceeds with the process without assigning the priority flag when receiving either the call request or the location registration request.

  The communication terminal 13 is a mobile communication terminal such as a smartphone or a mobile phone or an IP phone, for example, and communicates with the base station 12 via a wireless communication network (not shown).

  The call control device 14 includes a call control management unit 141, and typically performs call-related control using SIP (Session Initiation Protocol). When the call control management unit 141 receives the location registration request with the priority flag, the call control management unit 141 transmits the location registration request with the priority flag to the subscriber management device 15. Further, when receiving the call request with the priority flag, the call control management unit 141 transmits a subscriber information acquisition request for acquiring the location information of the destination communication terminal 13 to the subscriber management device 15.

  The subscriber management device 15 is, for example, an HLR (Home Location Register) or a home subscriber information server (HSS), and includes a subscriber management unit 151 and a storage unit 152. The subscriber management unit 151 generates / updates the subscriber information table and stores it in the storage unit 152.

  FIG. 4 is a diagram showing an example of the configuration of the subscriber information table. Subscriber information is recorded in the subscriber information table. Specifically, information indicating whether or not the subscriber is a target of priority connection includes identification information (ID) and position information of the communication terminal 13 used by the subscriber, and a call control device that manages the communication terminal 13 14 addresses are recorded in association with each other. The position information is, for example, an IP address.

  Returning to the description of FIG. 3, when the subscriber management unit 151 receives the subscriber information acquisition request, the subscriber management unit 151 reads the corresponding subscriber information with reference to the subscriber information table stored in the storage unit 152, and sends it to the call control device 14. Send. Further, when receiving the location registration request to which the priority flag is assigned, the subscriber management unit 151 updates the subscriber information table with the communication terminal 13 that has transmitted the location registration request as a priority connection target.

  FIG. 5 is a sequence diagram showing the operation of the communication control system when the mode is changed. Hereinafter, a case where the mode of the base station 12-1 set to the normal mode is changed to the priority control mode will be described as an example. First, the maintenance person inputs a predetermined command to the base station control device 11 and designates the base station 12-1 to change to the priority control mode. The control unit 111 of the base station control device 11 generates a mode change request notification and transmits it to the base station 12-1 (step S501).

  Upon receiving the mode change request notification, the priority control unit 121 of the base station 12-1 determines whether or not the own station mode is the normal mode. When the own station mode is the normal mode, the priority control unit 121 changes the setting to the priority control mode (step S502). When the mode change is completed, the priority control unit 121 generates a change completion notification and transmits it to the base station control apparatus 11 (step S503). Then, the priority control unit 121 instructs the request transmission unit 122 to give a priority flag when a location registration request or a call request is received from the communication terminal 13 in the subsequent processing.

  When receiving the change completion notification, the control unit 111 of the base station control device 11 notifies the maintenance person to that effect. By the above processing, the mode of the base station 12-1 can be changed by transmitting a mode change request notification from the base station controller 11 to the base station 12-1 in the area where communication should be prioritized. .

  FIG. 6 is a sequence diagram showing an operation at the time of location registration request processing in the base station 12 in the priority control mode. Hereinafter, a case where the communication terminal 13-1 located in the wireless area 17-1 of the base station 12-1 in the priority control mode makes a location registration request will be described as an example. When receiving the location registration request from the communication terminal 13-1, the request transmission unit 122 of the base station 12-1 assigns a priority flag to the location registration request (step 601), and transmits it to the call control device 14-1 ( Step 602). When the call control management unit 141 of the call control device 14-1 receives the location registration request with the priority flag added (step S603), the call control management unit 141 transmits the request to the subscriber management device 15 with the priority flag added (step S604).

  When the subscriber management unit 151 of the subscriber management device 15 receives the location registration request with the priority flag, it registers the location registration sender as a priority connection target (step S605). Specifically, the subscriber management unit 151 refers to the subscriber information table stored in the storage unit 152 and records that the corresponding communication terminal 13 is a priority connection target. When the registration is completed, the subscriber management unit 151 generates a registration completion notification and transmits it to the call control device 14-1 (step S606). The registration completion notification is transmitted to the communication terminal 13-1 via the call control device 14-1 and the base station 12-1 (steps S607 to S608).

  As a result of the above processing, the communication terminal 13-1 located in the area where communication should be prioritized can be identified by recording in the subscriber management apparatus 15 at the time of the location registration request that it is a priority connection target.

  FIG. 7 is a sequence diagram showing an operation at the time of call request processing in the base station 12 in the priority control mode. Hereinafter, a case where the communication terminal 13-1 located in the wireless area 17-1 of the base station 12-1 in the priority control mode transmits to the communication terminal 13-4 located in a different wireless area 17-3 will be described as an example. To do.

  The communication terminal 13-1 generates a call request for requesting a call connection to the communication terminal 13-4 and transmits it to the base station 12-1 (step S701).

  The priority control unit 121 of the base station 12-1 gives a priority flag to the received call request (step S702) and transmits it to the call control device 14-1 (step S703). When the call control device 14-1 receives the call request with the priority flag assigned, the call control device 14-1 proceeds with the call request processing in preference to the other call requests with no priority flag assigned. When giving priority to a call request, a line reserved in advance for an emergency call may be used, or another call request may be regulated to give priority to a necessary call request.

  The call control management unit 141 of the call control device 14-1 generates a subscriber information acquisition request and transmits it to the subscriber management device 15 in order to confirm the location information of the destination communication terminal 13-4 (Step S1). S704). The subscriber management unit 151 of the subscriber management device 15 transmits the corresponding subscriber information to the call control device 14-1 in response to the request from the call control device 14-1 (step S705). The request transmission unit 122 of the call control device 14-1 that has acquired the location information transmits the location registration request with the priority flag added to the call control device 14-2 that manages the communication terminal 13-4 that is the destination (step S706). ).

  Thereafter, the call request is transmitted to the communication terminal 13-4 via the base station 12-2 (step 707) (step S708). The communication terminal 13-4 generates a call permission response and transmits it to the base station 12-2 (step S709). The call permission response is transmitted to the communication terminal 13-1 (step S713) through the call control device 14-2, the call control device 14-1, and the base station 12-1 (steps S710 to 712). Thereby, a telephone call is started (step S714). Through the above processing, the call request of the communication terminal 13-1 located in the area where communication should be prioritized can be connected with priority over other communication.

  FIG. 8 is a sequence diagram showing an operation at the time of a call request process for the communication terminal 13 located in the radio area of the base station 12 in the priority control mode. Hereinafter, the communication terminal 13-4 located in the radio area 17-3 of the base station 12-2 in the normal mode is changed to the communication terminal 13- located in the radio area 17-1 of the base station 12-1 in the priority control mode. The case where the call is sent to 1 will be described as an example.

  The communication terminal 13-4 generates a call request and transmits it to the base station 12-3 in the wireless area 17-74 in which the communication terminal 13-4 is located (step S801). Since the base station 12-3 is in the normal mode, the request transmission unit 122 transmits a call request to the call control device 14-2 without assigning a priority flag (step S802).

  The call control management unit 141 of the call control device 14-2 generates a subscriber information acquisition request and transmits it to the subscriber management device 15 (step S803). The subscriber management unit 151 of the subscriber management device 15 transmits the corresponding subscriber information to the call control device 14-2 in response to the request from the call control device 14-2 (step S804). The subscriber information transmitted at this time includes information indicating that the subscriber (the destination communication terminal) is the priority control target. Therefore, when receiving the subscriber information, the call control management unit 141 of the call control device 14-2 gives a priority flag to the call request (step S805), and manages the destination communication terminal 13-1. 14-1 (step S806). On the other hand, when the information indicating that the subscriber is a priority control target is not included in the subscriber information, the call control device 14-2 sends a call request to the call control device 14-1 without assigning a priority flag. Send. The call control device 14-1 treats a call request without a priority flag as a restriction target. Specifically, the call control management unit 141 of the call control device 14-1 transmits error responses to the call control device 14-2 at a constant rate. Since a call request when an error response is transmitted is not permitted, a call with a low priority can be regulated.

  The call request is then transmitted to the communication terminal 13-1 via the base station 12-1 (step 807) (step S808). The communication terminal 13-1 generates a call permission response and transmits it to the base station 12-1 (step S809). The call permission response is transmitted to the communication terminal 13-4 (step S813) through the call control device 14-1, the call control device 14-2, and the base station 12-3 (steps S810 to 812). Thereby, a telephone call is started (step S814). With the above processing, it is possible to connect a call request from another area to the communication terminal 13-1 located in the area where the call should be prioritized with priority over other communication.

  As described above, according to the present embodiment, even when communication is restricted, the communication terminal located in another wireless area can perform the incoming and outgoing calls and the location registration processing of the communication terminal located in the predetermined wireless area. Can be implemented in preference to Generally, in order to preferentially control communication of a specific communication terminal, it is necessary to set in advance in a device in the core network. However, according to the present embodiment, it is possible to automatically perform priority control of outgoing / incoming calls and location registration processing of communication terminals located within the service area of the base station by simply setting the priority control mode in the base station. . As a result, it is possible to save the trouble of manually setting the devices in the core network.

  In general, a base station in a mobile communication network includes a macro cell having an area range of about 100 m to several km and a femto cell having an area range of about 10 m to several hundred meters. Here, in places where the population density is high, such as in the city center, a higher effect can be obtained by applying the present invention to a base station having a relatively narrow area range such as a femtocell. In general, since the number of connections for priority calls is limited, when a disaster or the like occurs and there is a risk of congestion in the network, it may be difficult to make all areas where the disaster occurred priority control targets. Therefore, if priority control is performed for a base station with a relatively narrow area range such as a femtocell, the number of targets for priority control is reduced compared to a macrocell with a wide area range. On the other hand, priority control can be set, and the number of connections for priority calls can be used effectively. On the other hand, in places where the population density is relatively small, such as in rural areas and mountainous areas, higher effects can be obtained by applying the present invention to a base station having a wide area range such as a macro cell. In addition, by applying to a femto cell or a macro cell base station according to the situation, it is possible to finely cover an area requiring priority control.

  In the present embodiment, the case where the mode change request is an instruction to switch the mode has been described as an example. However, the mode change request may specify the content of the mode to be changed.

  Further, in the present embodiment, the case where connection or location registration is performed with priority given to all requests (location registration requests and call requests) to which priority flags are assigned has been described. Here, the priority flag may be given a priority (for example, divided into five stages of 1 to 5, with “1” having the highest priority). In this case, when there is a possibility that congestion will occur because the number of requests to which priority flags are given exceeds a predetermined number, the generation of congestion can be prevented by processing the requests according to the priority order of the priority flags.

(Third embodiment)
The communication control system according to the third embodiment of the present invention includes priority control units included in the base stations 12-1 to 12-3 as compared with the communication control system according to the second embodiment illustrated in FIGS. The operation of 121 is different. Hereinafter, the difference will be mainly described with reference to FIG.

  Upon receiving an emergency message from the call control device 14 when a disaster such as an earthquake occurs, the priority control unit 121 changes its own mode to the priority control mode. The emergency message is distributed using, for example, a cell broadcast (CBS) system.

  FIG. 9 is a sequence diagram showing an operation at the time of mode change of the communication control system according to the present embodiment. Hereinafter, a case where the mode of the base station 12-1 is changed will be described as an example.

  First, when an emergency bulletin notifying the occurrence of a disaster is delivered from the Japan Meteorological Agency or the like, an emergency message is transmitted to the base station 12-1 via the call control device 14 (step S901).

  When receiving the emergency message, the priority control unit 121 of the base station 12-1 changes its own mode to the priority control mode (step S902). When the mode change is completed, the priority control unit 121 generates a change completion notification and transmits it to the call control device 14 (step S903).

  As described above, according to the present embodiment, it is possible to automatically set the priority control mode in the necessary area in conjunction with the emergency warning when a disaster occurs. It is possible to save labor for the maintenance person to individually set the area to be prioritized over the base station controller.

  In the present embodiment, the case where the communication control system includes the base station control device has been described. However, it is only necessary to realize a configuration in which an emergency message is transmitted to the base station via the call control device. It is also possible to omit the installation.

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)
A communication control system comprising a base station connected to a communication terminal so as to be capable of wireless communication, and a call control device that performs control related to a call of the communication terminal,
The base station
A priority control unit that switches the setting of the own station to a priority control mode in which priority communication is possible;
When the setting is switched to the priority control mode by the priority control unit, a priority flag is given to the request transmitted from the communication terminal located in the wireless area of the local station, and the request transmission unit transmits to the call control device,
The call control device preferentially processes the request with the priority flag assigned according to the content of the priority flag,
The communication control system, wherein the request is a location registration request or a call request.
(Appendix 2)
Furthermore, a subscriber management device for managing subscriber information is provided,
The subscriber management device
When the base station receives a location registration request with a priority flag added via the call control device, it stores, as subscriber information, priority information indicating that the call of the communication terminal that is the transmission source of the request should be given priority The communication control system according to supplementary note 1, including a section.
(Appendix 3)
When the call control apparatus receives a request for a call without a priority flag, the call control apparatus requests the subscriber management unit to transmit subscriber information, and if the received subscriber information includes priority information, the call control apparatus The communication control system according to appendix 2, including a call control management unit for connecting the request in priority to other call requests.
(Appendix 4)
Furthermore, a base station controller connected to the base station via a network is provided,
The base station control device according to any one of appendices 1 to 3, including a control unit that instructs the base station to switch modes.
(Appendix 5)
The communication control system according to any one of appendices 1 to 4, wherein switching to the priority control mode is performed in conjunction with an emergency bulletin distributed when a disaster occurs.
(Appendix 6)
A priority control unit that switches the setting of the own station to a priority control mode in which priority communication is possible;
When the setting is switched to the priority control mode by the priority control unit, a request transmission unit that gives a priority flag to a request transmitted from a communication terminal located in the wireless area of the own station and transmits it to the call control device,
The request is a location registration request or a call request, a base station.
(Appendix 7)
In the base station, a priority control step for switching the setting of the own station to a priority control mode capable of priority communication;
When the setting of the base station is switched to the priority control mode in the priority control step, the base station gives a priority flag to a request transmitted from a communication terminal located in the wireless area of the own station and transmits the request to the call control device. A request sending step;
The call control device preferentially processes the request with the priority flag assigned according to the contents of the priority flag,
A communication control method comprising: a processing step in which the request is a location registration request or a call request.
(Appendix 8)
In the base station, a priority control step for switching the setting of the own station to a priority control mode capable of priority communication;
When the setting of the base station is switched to the priority control mode in the priority control step, the base station gives a priority flag to a request transmitted from a communication terminal located in the wireless area of the own station and transmits the request to the call control device. A request sending step;
In the call control device, the processing step for preferentially processing the request with the priority flag assigned according to the content of the priority flag,
A communication control program in which the request is a location registration request or a call request.

DESCRIPTION OF SYMBOLS 11 Base station control apparatus 12,120 Base station 13,130 Communication terminal 14,140 Call control apparatus 15 Subscriber management apparatus 111 Control part 121 Priority control part 122 Request transmission part 141 Call control management part 151 Subscriber management part 152 Storage part

Claims (7)

A communication control system comprising a base station connected to a communication terminal so as to be capable of wireless communication, and a call control device that performs control related to a call of the communication terminal,
The base station
A priority control unit that switches the setting of the own station to a priority control mode in which priority communication is possible;
When the setting is switched to the priority control mode by the priority control unit, a request transmission unit that gives a priority flag to a request transmitted from the communication terminal located in the wireless area of the local station and transmits the request to the call control device; Including
The call control apparatus, a communication control system in which the priority flag is a request granted, to physical treatment preferentially in accordance with the contents of the priority flag. Furthermore, a subscriber management device for managing subscriber information is provided,
The subscriber management device is:
When the base station receives a location registration request with a priority flag via the call control device, it holds priority information indicating that the call of the communication terminal that is the transmission source of the request should be given priority as subscriber information The communication control system according to claim 1, further comprising a storage unit. The call control apparatus receives the request for call priority flag is not granted, the request to transmit the subscriber information to the subscriber management system, contains priority information in the received subscriber information The communication control system according to claim 2, further comprising a call control management unit that connects the call request with priority over other call requests. Furthermore, a base station controller connected to the base station via a network is provided,
The communication control system according to claim 1, wherein the base station control device includes a control unit that instructs the base station to switch modes.   The communication control system according to any one of claims 1 to 4, wherein switching to the priority control mode is performed in conjunction with an emergency bulletin distributed when a disaster occurs. A priority control unit that switches the setting of the own station to a priority control mode in which priority communication is possible;
A request transmission unit for adding a priority flag to a request transmitted from the communication terminal located in the wireless area of the local station and transmitting the request to the call control device when the setting is switched to the priority control mode by the priority control unit; Bei obtain a base station. In the base station, a priority control step for switching the setting of the own station to a priority control mode capable of priority communication;
When the setting of the base station is switched to the priority control mode in the priority control step, the call control apparatus assigns a priority flag to a request transmitted from the communication terminal located in the wireless area of the base station. A request sending step to send to
The call control apparatus, and a processing step of physical processing preferentially in response to a request which the priority flag is applied to the contents of the priority flag, a communication control method.

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