JP6496628B2 - Subscriber identifier registration method, application server, program and apparatus - Google Patents

Description

  The present invention relates to a technique for registering a subscriber identifier in a subscriber server.

The mobile communication service system includes a “transport core network” configured by a large number of radio base stations and a “control core network” that accommodates and controls the base stations.
For example, UMTS (Universal Mobile Telecommunications System) and LTE (Long Term Evolution) radio technologies are applied to the “transport core network”.
In the “control core network”, a standardized service control system such as IMS is defined (for example, see Non-Patent Document 1).

  The IMS performs necessary network resource allocation and gate control. Thereby, for example, an IP-based multimedia communication service represented by VoLTE (Voice over LTE) (for example, a videophone or IM (Instant Message)) can be provided. This is a core technology that realizes the next generation mobile phone network or NGN (Next Generation Network), and realizes all-IP communication in which all terminals communicate on an IP basis.

IMS mainly has the following three functions.
CSCF (Call Session Control Function) as a session control function
Application server that controls application services
(Application Server)
Subscriber server that stores subscriber information (Home Subscriber Server)

  The CSCF is a function for controlling a session. The CSCF selects / sets a communication session between terminals and an application server according to service conditions. Then, the CSCF transmits an SIP (Session Initiation Protocol) signal that is a session control protocol and an SDP (Session Description Protocol) signal that is a session description protocol to the application server. The CSCF is divided into three functional elements: P-CSCF (Proxy-CSCF), S-CSCF (Serving-CSCF), and I-CSCF (Interrogating-CSCF).

Further, a SIM (Subscriber Identity Module Card) card is inserted in a mobile terminal (UE (User Equipment)) possessed by the user. In the SIM, an ISIM (IP Multimedia Services Identity Module) relating to an IMS service is defined. For example, the following two identifiers are defined (see, for example, Non-Patent Document 2).
IMPI (IP Multimedia Private Identity): ID for authentication
IMPU (IP Multimedia PUblic identity): ID for authentication and IMS service

Furthermore, the function of USIM (Universal Subscriber Identity Module) used in UMTS and LTE is defined for the SIM card. For example, the following two formats are defined (for example, see Non-Patent Document 3).
IMSI (International Mobile Subscriber Identity): ID for authentication and service
MSISDN (Mobile Subscriber ISDN Number): Telephone number ID

3GPP TS 23.228, `` IP Multimedia Subsystem (IMS); Stage 2 '' 3GPP TS 31.103, `` Characteristics of the IP Multimedia Services Identity Module (ISIM) application '' 3GPP TS 31.102, `` Characteristics of the Universal Subscriber Identity Module (USIM) application ''

  For example, when a natural disaster or the like occurs in a wide area, a communication isolated area where the connection from the terminal owned by the user to the wide area network is cut off due to a power failure, a base station collapse, a backhaul line disconnection, or the like. In this case, measures are taken so that the carrier can connect to the wide area network from the terminal as much as possible by bringing a base station or a communication business facility equipped with a connection function to the wide area network to the communication isolated area. The Since base stations and communication business facilities are carried by things such as automobiles, balloons, and helicopters, it takes a relatively long time to actually communicate.

On the other hand, in a region where a natural disaster has occurred, a large number of rescue teams have been introduced, and the victims and rescuers are mixed. In such a case, if it is possible to operate a call service only in the area using a terminal owned by the user, it is considered effective for the rescue operation.
On the other hand, as long as the connection from the terminal to the wide area network is cut off, it is impossible to operate even a call service only in the area.
Further, not only in natural disasters, even in a specific event venue where communication with a wide area network is cut off, it is not possible to operate a call service between users staying there.

  In addition, there is a problem in cost to construct a dedicated communication business facility that is used only in a communication isolated area. For this purpose, it is conceivable that the entire existing EPC or IMS system constructed in software is mounted on portable hardware and used as a communication business facility. The entire software system can be built in one call service device.

Here, when providing a call service in an area disconnected from the wide area network, how is the subscriber identifier including the user's telephone number registered in the subscriber server of this system? Is a problem. The telephone number is necessary for the call service and is usually registered when the user subscribes.
In particular, in the case of a telephone call service, it is necessary to register a mobile subscriber integrated services digital network number (MSISDN) in advance in subscriber information included in an HLR (Home Location Register) used in a circuit-switched core network. .

According to IMS, MSISDN is not necessarily included in subscriber information. However, by registering the MSISDN IMPU, the telephone call service can be operated. For example, it is described as follows.
MSISDN: 818012345678
IMPU: sip: +818012345678@au.com
In particular, among the plurality of IMPUs registered in advance in the subscriber server, the IMPU registered at the top is regarded as the default IMPU. The terminal and the CSCF function so that the default IMPU is preferentially used for the IMS service. Therefore, it is necessary to register an IMPU in the MSISDN format at the default IMPU location.

  However, it is extremely difficult to register the MSISDN to the subscriber server in all terminals existing in the communication isolated area where the connection to the wide area network is cut off.

  Therefore, the present invention provides a subscriber identifier registration method, an application server, a call service device, and a program capable of registering a subscriber identifier even if the subscriber identifier capable of making a call is an unregistered terminal. With the goal.

According to the present invention, a subscriber identifier registration method for registering a subscriber identifier in a system having a terminal, an application server, and a subscriber server,
When the application server receives a registration request from the terminal, the first step inquires of the subscriber server about the terminal, and determines whether or not the subscriber identifier including the telephone number is unregistered in the subscriber server;
A second step of transmitting a message request for requesting a message notification in which a telephone number is described to the terminal when the application server determines that the first step is unregistered;
When the terminal receives the message request, a third step of sending a message notification describing the telephone number to the application server;
The application server includes a fourth step of generating a subscriber identifier including the telephone number described in the message notification and registering the subscriber identifier in the subscriber server.

According to another embodiment of the subscriber identifier registration method of the present invention,
The application server and the subscriber server are preferably configured as an IMS (IP Multimedia Subsystem).

According to another embodiment of the subscriber identifier registration method of the present invention,
For the first step,
The application server sends a subscriber information request for the terminal to the subscriber server,
It is also preferable that the application server determines whether or not an IMPU (IP Multimedia Public Identity) in the MSISDN (Mobile Subscriber Integrated Services Digital Network Number) format is registered in the subscriber information response received from the subscriber server.

According to another embodiment of the subscriber identifier registration method of the present invention,
For the fourth step, the subscriber identifier generated by the application server is preferably an MSISDN-format IMPU including a telephone number.

According to another embodiment of the subscriber identifier registration method of the present invention,
For the fourth step, the application server sends a subscriber information update request including the IMPU in MSISDN format to the subscriber server,
The subscriber server also preferably registers the MSISDN format IMPU received by the subscriber information update request .

According to another embodiment of the subscriber identifier registration method of the present invention,
CSCF (Call Session Control Function) is interposed between the terminal and the application server and subscriber server,
For the first step, after the terminal sends a registration request to the CSCF,
CSCF sends a registration request to the application server,
The application server sends a subscriber information request for the terminal to the subscriber server,
The subscriber server returns a subscriber information response including a subscriber identifier in a non-MSISDN format to the application server,
It is also preferable that the application server registers the non-MSISDN type IMPU subscriber identifier for the terminal.

According to another embodiment of the subscriber identifier registration method of the present invention,
For the first step, after the terminal sends a registration request to the CSCF,
The CSCF sends a subscriber information request for the terminal to the subscriber server,
The subscriber server returns a subscriber information response including the subscriber identifier of the non-MSISDN format IMPU to the CSCF,
It is also preferred that the CSCF registers the non-MSISDN IMPU subscriber identifier for the terminal.

According to another embodiment of the subscriber identifier registration method of the present invention,
The application server and subscriber server are built in an area disconnected from the wide area network,
It is also preferable to register a call service for a terminal of a subscriber who is not registered in the subscriber server.

According to the present invention, an application server for registering a subscriber identifier in a subscriber server,
A subscriber unregistration determination means for inquiring of the terminal to the subscriber server when receiving a registration request from the terminal and determining whether or not a subscriber identifier including a telephone number is unregistered in the subscriber server;
A message requesting means for sending a message request for requesting a message notification in which a telephone number is described to the terminal when it is determined as unregistered by the subscriber unregistered determining means;
Message receiving means for receiving a message notification in which a telephone number is described from a terminal;
It has a subscriber identifier registration means for generating a subscriber identifier including a telephone number described in the message notification and registering the subscriber identifier in the subscriber server.

According to the present invention, a call service device comprising:
Built-in application server and subscriber server, core network control device, and base station that communicates wirelessly with the terminal,
Application server
When a registration request is received from a terminal via a base station and a core network controller, the subscriber is inquired of the subscriber server about the terminal, and the subscriber server determines whether or not a subscriber identifier including a telephone number is unregistered. Unregistered determination means,
A message requesting unit for transmitting a message request for requesting a message notification in which a telephone number is described to the terminal via the core network control device and the base station when it is determined that the subscriber is not registered by the unregistered determination unit; ,
Message receiving means for receiving a message notification describing a telephone number from a terminal via a base station and a core network control device;
It has a subscriber identifier registration means for generating a subscriber identifier including a telephone number described in the message notification and registering the subscriber identifier in the subscriber server.

According to the present invention, there is provided a program for causing a computer installed in a call service device to function,
The computer functions as a base station that communicates wirelessly with the application server and subscriber server, the core network control device, and the terminal,
Application server
When a registration request is received from a terminal via a base station and a core network controller, the subscriber is inquired of the subscriber server about the terminal, and the subscriber server determines whether the subscriber identifier including the telephone number is unregistered Unregistered determination means,
A message requesting unit for transmitting a message request for requesting a message notification in which a telephone number is described to the terminal via the core network control device and the base station when it is determined that the subscriber is not registered by the unregistered determination unit; ,
Message receiving means for receiving a message notification describing a telephone number from a terminal via a base station and a core network control device;
A subscriber identifier including a telephone number described in the message notification is generated, and the computer is caused to function as a subscriber identifier registration means for registering the subscriber identifier in the subscriber server.

  According to the subscriber identifier registration method, application server, call service device, and program of the present invention, even if a subscriber identifier for which a call is possible is an unregistered terminal, the subscriber identifier can be registered.

It is a system configuration diagram in the present invention. It is a sequence diagram in the present invention. It is a sequence diagram showing the update of IMPU. It is a function block diagram of the application server of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a system configuration diagram according to the present invention.

  According to FIG. 1, the call service device 1 is mounted on, for example, a helicopter or balloon that can stand by in the air, or an automobile that can move on the ground. The call service device 1 is placed in a communication isolated area that is disconnected from the wide area network. In addition, the call service device 1 of the present invention includes the entire existing IMS built in software. This eliminates the need to construct a dedicated communication business facility that is used only in isolated communication areas. The call service device 1 temporarily provides a call service even to a terminal that has not registered a subscriber identifier including a telephone number in the subscriber server.

According to FIG. 1, the call service device 1 is conceptually classified into the following five functions.
RAN (Radio Access Network) function EPC (Evolved Packet Core) function IMS (IP Multimedia Subsystem) function Application server (Application Server) function Subscriber server (Home Subscriber Server) function These functional components are installed in the call service device. This is realized by executing a program that causes a computer to function.

The terminal 2 is like an existing mobile phone or smartphone owned by the user.
The “RAN” is configured by an eNB (e-Node B) 13 as a large number of base stations, and communicates with the terminal 2 via radio based on the LTE scheme, for example.
“EPC” functions as a transport core network.
“IMS” functions as a control core network.

The “CSCF” in the IMS is a core network control device and establishes a session with the terminal 2 via the eNB 13. The CSCF 14 generally includes a P-CSCF (Proxy-CSCF), an S-CSCF (Serving-CSCF), and an I-CSCF (Interrogate-CSCF).
The P-CSCF extracts media information for each session and instructs gate control and resource control for the gateway when the session is established.
The S-CSCF is a central SIP server for call session control, and executes application server selection and authentication processing for a subscriber server.
The I-CSCF resolves the called CSCF with the subscriber server 12.
The CSCF 14 is interposed between the terminal 2 and the application server 11 and the subscriber server 12.

Here, registration of a subscriber identifier including a telephone number, which is an essential part of the present invention, is realized by an application server function.
In the following description, the application server 11 and the subscriber server 12 are described as communicating with the terminal 2 via the IMS, but of course, a simple IP (Internet Protocol) telephone network may be used.

  According to the present invention, for example, when a natural disaster or the like occurs in a wide area, the terminal 2 communicates only with the call service device 1 installed in the area where the connection to the wide area network is broken. Therefore, in the case of the newly installed call service device 1, the subscriber server 12 incorporated therein does not register a subscriber identifier including a telephone number for the terminal 2 that can make a call within that range. According to the present invention, even in such a case, when the terminal 2 sends a registration request, the subscriber identifier including the telephone number of the terminal 2 can be registered.

  FIG. 2 is a sequence diagram in the present invention.

(S101) The terminal 2 transmits a registration request (SIP: REGISTER) to the IMS, triggered by power-on or the like. The terminal 2 registers IMPU1 obtained from ISIM in the From header and To header of the registration request as follows, for example.
sip: IMSI@au.com
Here, the identifier described in the From header and To header of the registration request does not match the telephone number of the terminal 2. In the case of the telephone number of a mobile phone, it is represented by an 11-digit number, for example. At this time, the IMS side cannot know the telephone number of the terminal 2 and the subscriber identifier based on the telephone number is not registered in the subscriber server 12.
In addition, the registration request transmitted from the terminal 2 is received by the eNB 13 of the call service device 1 and transferred to the CSCF 14.

(S102) Upon receiving the registration request, the CSCF (particularly the S-CSCF) 14 transmits a subscriber information request (Cx: SAR) to the subscriber server 12. The CSCF 14 includes IMPU1 extracted from the registration request in the Cx: SAR signal parameter Public-Identity AVP.
On the other hand, the subscriber server 12 returns IMS subscriber information (Cx Service Profile) including IMPU1 to the CSCF 14 by a subscriber information response (Cx: SAA). IMS subscriber information is included in the Cx: SAR signal parameter User-Data AVP.

(S103) The CSCF 14 stores the IMS subscriber information received from the subscriber server 12.

(S104) Then, the CSCF 14 returns a registration response (SIP: 200 OK) to the terminal 2 via the eNB 13.

(S105) Next, the CSCF 14 transmits a registration request (SIP: REGISTER) to the application server 11 by 3rd party registration. The CSCF 14 includes IMPU1 in the From header and To header of the registration request.

(S106) Upon receiving the registration request, the application server 11 transmits a subscriber information request (Sh: UDR) of the IMPU1 to the subscriber server 12, and inquires about the terminal 2.
In response to this, the subscriber server 12 returns a subscriber information response (Sh: UDA) to the application server 11. The AS subscriber information (Sh Data) related to IMPU1 is as follows.
Data-Reference AVP
<-Set IMSPublicIdentity (10)
Identity-Set AVP
<-ALL_IDENTITIES (0), REGISTERED_IDENTITIES (1),
All or part of IMPLICIT_IDENTITIES (2), ALIAS_IDENTITIES (3)
The AS subscriber information is included in the Sh: UDA signal parameter User-Data AVP.

Here, when the subscriber server 12 originally registers an IMPU in the MSISDN format for the terminal 2, the Data-Reference AVP includes MSISDN (17).
However, at this point, the subscriber server 12 determines that the terminal 2 is a new subscriber and has not registered MSISDN (17). Therefore, MSISDN (17) is not included in the Data-Reference AVP. Here, the subscriber server 12 returns a subscriber information response including a subscriber identifier in a non-MSISDN format to the application server 11.

(S107) The application server 11 registers the AS subscriber information (Sh Data) related to IMPU1 received from the subscriber server 12. As the AS subscriber information (Sh Data) here, only the subscriber identifier of the non-MSISDN format IMPU is registered in the terminal 2.

(S108) Then, the application server 11 returns a registration response (SIP: 200 OK) to the CSCF 14.

  The above-described series of steps S101 to S108 is automatically executed with the power-on of the terminal 2 as a trigger.

  FIG. 3 is a sequence diagram showing IMPU update. Below, it demonstrates along S1-S4 of FIG. 2 using FIG.

[S1: First step]
The application server 11 determines whether an MSISDN format is registered in the IMPU included in the subscriber information response received from the subscriber server 12. When the call service device 1 is installed in an area disconnected from the wide area network, the subscriber server 12 does not register the MSISDN IMPU of the terminal 2. Here, the application server 11 determines that it is unregistered.

[S2: Second step]
When the application server 11 determines that the MSISDN-format IMPU of the terminal 2 is not registered in the subscriber server 12, the application server 11 sends a message request for requesting a message notification in which the telephone number is described to the terminal 2. To do. This message request instructs the terminal 2 to describe MSISDN in the message notification.
For this message request, for example, the SIP: MESSAGE method is used. In the SIP body part, a parameter for instructing activation of a service using MSISDN (for example, SMS (Short Message System)) is described.

[S3: Third step]
In response to the received message request, the terminal 2 returns a response (SIP: 200 OK) when the message notification can be transmitted.
And the terminal 2 acquires a telephone number (for example, 818012345678) from its own USIM. Then, the terminal 2 transmits a message notification (SIP request) in which a telephone number is described to the application server 11. This message notification may be a message transmission by SMS. The SMS message includes telephone number transmission source information (for example, 818012345678).
Here, the terminal 2 may automatically transmit a message notification in response to reception of a message request, or may transmit it according to a user operation. When the message notification is transmitted in response to a user operation, the user who operates the terminal 2 can recognize that the call service can be used.

  In response to this, the application server 11 that has received the message notification returns a response (SIP: 200 OK) to the terminal 2.

[S4: Fourth step]
(S41) The application server 11 generates a subscriber identifier including the telephone number described in the message notification. The subscriber identifier generated here is IMPU2 in MSISDN format including a telephone number as a part. The format of IMPU2 is as follows.
sip: +818012345678@au.com

(S42) The application server 11 transmits a subscriber information update request (Sh: PUR) to the subscriber server 12 in order to register the generated IMPU2 as a subscriber identifier. Here, IMPU2 and MSISDN are described in the Sh: PUR signal parameters as AS subscriber information in exactly the same manner as S106 described above.
IMPU1 is included in the User-Identity AVP
IMPU2 and MSISDN are included in User-Data AVP

(S43) The subscriber server 12 registers the MSISDN format IMPU2 and MSISDN received by the subscriber information update request.
Here, even if the subscriber server 12 receives the subscriber information update request received from the application server 11, the subscriber server 12 also updates the IMS subscriber information for IMPU2.

(S44) The subscriber server 12 returns a subscriber information update response (Sh: PUA) to the application server 11.

(S45) The subscriber server 12 transmits a subscriber information notification (Cx: PPR) including the IMS subscriber information describing IMPU2 to the CSCF 14 in order to notify that the IMS subscriber information has been updated. .
(S46) The CSCF 14 registers the IMPU2 of the IMS subscriber information included in the subscriber information notification received from the subscriber server 12.
(S47) Then, the CSCF 14 returns a notification response (Cx: PPA) to the subscriber server 12.

  According to the present invention, the application server automatically acquires the MSISDN in response to a registration request from the terminal, generates an IMPU in the MSISDN format required by the IMS, and registers the IMPU with the subscriber server as subscriber information. can do. As a result, the user can use the call service without pre-registering a telephone number as subscriber information.

  FIG. 4 is a functional configuration diagram of the application server of the present invention.

  The application server 11 controls the terminal 2 that is not registered in the subscriber server 12 to register a call service. According to FIG. 4, it has the subscriber unregistration determination part 111, the message request | requirement part 112, the message receiving part 113, and the subscriber identifier registration part 114. FIG. These functional components are realized by executing a program that causes a computer mounted on the application server to function.

  When receiving a registration request from a terminal, the subscriber unregistration determination unit 111 inquires of the subscriber server about the terminal, and determines whether or not the subscriber identifier including the telephone number is unregistered (described above). The same as S1 in FIGS.

  When the subscriber unregistration determination unit 111 determines that the message is not registered, the message request unit 112 transmits a message request for requesting a message notification in which the telephone number is described to the terminal 2 (see FIG. 2 and FIG. 2 described above). Same as S2 in FIG. 3).

  The message receiving unit 113 transmits a message notification in which the telephone number is described from the terminal 2 (similar to S3 in FIGS. 2 and 3 described above).

  The subscriber identifier registration unit 114 generates a subscriber identifier including the telephone number described in the message notification, and registers the subscriber identifier in the subscriber server (similar to S4 in FIGS. 2 and 3 described above).

  As described above in detail, according to the subscriber identifier registration method, application server, call service device, and program of the present invention, even if the subscriber identifier including the phone number is an unregistered terminal, the call service can be performed. You can register.

  Various changes, modifications, and omissions of the above-described various embodiments of the present invention can be easily made by those skilled in the art. The above description is merely an example, and is not intended to be restrictive. The invention is limited only as defined in the following claims and the equivalents thereto.

DESCRIPTION OF SYMBOLS 1 Call service apparatus 11 Application server 111 Subscriber unregistration determination part 112 Message request part 113 Message reception part 114 Subscriber identifier registration part 12 Subscriber server 13 eNB
14 CSCF
2 terminal

Claims (10)

A subscriber identifier registration method for registering a subscriber identifier in a system having a terminal, an application server, and a subscriber server,
When the application server receives a registration request from the terminal, the application server inquires of the subscriber server about the terminal, and determines whether or not a subscriber identifier including a telephone number is unregistered in the subscriber server. Steps,
A second step of transmitting a message request for requesting a message notification in which a telephone number is described to the terminal when the application server determines that it is not registered in the first step;
When the terminal receives the message request, a third step of sending a message notification describing a telephone number to the application server;
The application server includes a fourth step of generating a subscriber identifier including the telephone number described in the message notification and registering the subscriber identifier in the subscriber server. Identifier registration method. The application server and the subscriber server are configured as IMS (IP Multimedia Subsystem),
For the first step,
The application server sends a subscriber information request for the terminal to the subscriber server;
The application server determines whether or not an IMPU (IP Multimedia Public Identity) in an MSISDN (Mobile Subscriber Integrated Services Digital Network Number) format is registered in the subscriber information response received from the subscriber server. The subscriber identifier registration method according to claim 1. The subscriber identifier registration method according to claim 2, wherein the subscriber identifier generated by the application server in the fourth step is an IMPU in MSISDN format including a telephone number. For the fourth step,
The application server sends a subscriber information update request including the MSISDN-format IMPU to the subscriber server,
The subscriber identifier registration method according to claim 3 , wherein the subscriber server registers the IMPU in the MSISDN format received by the subscriber information update request . A CSCF (Call Session Control Function) is interposed between the terminal and the application server and the subscriber server,
For the first step, after the terminal sends a registration request to the CSCF,
The CSCF sends a registration request to the application server;
The application server sends a subscriber information request for the terminal to the subscriber server;
The subscriber server returns a subscriber information response including a subscriber identifier in a non-MSISDN format to the application server;
5. The subscriber identifier registration method according to claim 2, wherein the application server registers a subscriber identifier of the IMPU in the non-MSISDN format for the terminal. 6. For the first step, after the terminal sends a registration request to the CSCF,
The CSCF sends a subscriber information request for the terminal to the subscriber server;
The subscriber server returns a subscriber information response including a non-MSISDN-format IMPU subscriber identifier to the CSCF;
6. The subscriber identifier registration method according to claim 5, wherein the CSCF registers the subscriber identifier of the IMPU in the non-MSISDN format with respect to the terminal. The application server and the subscriber server are constructed in a region disconnected from a wide area network,
The subscriber identifier registration method according to any one of claims 1 to 6, wherein a call service is registered for a terminal of a subscriber who is not registered in the subscriber server. An application server for registering a subscriber identifier in a subscriber server,
Upon receiving a registration request from a terminal, a subscriber registered determination means for determining the subscriber identifier whether unregistered or not containing query the terminal to the subscriber server, the telephone number to the subscriber server,
A message requesting means for sending a message request for requesting a message notification in which a telephone number is described to the terminal when the subscriber unregistered determining means determines that it is not registered;
Message receiving means for receiving a message notification describing a telephone number from the terminal;
An application server comprising subscriber identifier registration means for generating a subscriber identifier including the telephone number described in the message notification and registering the subscriber identifier in the subscriber server. A call service device,
Built-in application server and subscriber server, core network control device, and base station that communicates wirelessly with the terminal,
The application server is
When a registration request is received from the terminal via a base station and a core network control device, the terminal is inquired of the subscriber server, and whether or not a subscriber identifier including a telephone number is unregistered in the subscriber server. A subscriber unregistered judging means for judging;
A message request for transmitting a message request for requesting a message notification in which a telephone number is described to the terminal via the core network control device and the base station when it is determined as unregistered by the subscriber unregistration determining means Means,
Message receiving means for receiving a message notification describing a telephone number from the terminal via a base station and a core network control device;
A call service apparatus comprising: a subscriber identifier registration unit configured to generate a subscriber identifier including the telephone number described in the message notification and register the subscriber identifier in the subscriber server. A program for causing a computer installed in a call service device to function,
The computer functions as a base station that communicates wirelessly with the application server and subscriber server, the core network control device, and the terminal,
The application server is
When a registration request is received from the terminal via a base station and a core network control device, the terminal is inquired of the subscriber server, and whether or not a subscriber identifier including a telephone number is unregistered in the subscriber server. A subscriber unregistered judging means for judging;
A message request for transmitting a message request for requesting a message notification in which a telephone number is described to the terminal via the core network control device and the base station when it is determined as unregistered by the subscriber unregistration determining means Means,
Message receiving means for receiving a message notification describing a telephone number from the terminal via a base station and a core network control device;
A telephone service device for generating a subscriber identifier including the telephone number described in the message notification and causing a computer to function as a subscriber identifier registration means for registering the subscriber identifier in the subscriber server Program.

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