JP4819716B2 - Call control server and call control method - Google Patents

Description

  The present invention relates to a call control server and a call control method for controlling outgoing and incoming calls in an application layer in a call service using packet communication between wireless communication terminals.

In the conventional technology, in a mobile communication network, when a call is made while the callee wireless communication terminal that is the callee is out of service area, an incoming call notification is sent to notify that the call has been received. A system for notifying a wireless communication terminal has been devised. For example, in the following Patent Document 1, when a call is made to the called wireless communication terminal while the called wireless communication terminal is out of service area, the telephone number of the calling call wireless communication terminal is set. A configuration for notifying an incoming call side wireless communication terminal including an incoming call notification is disclosed.
JP 2005-503088 gazette

  By the way, as information for specifying the type of communication and communication such as packet communication and voice call realized on the mobile communication network, such as communication quality, information transfer capability (ITC: Information Transfer Capability), encoding method, communication speed, etc. There is a concept of a bearer specified by a combination.

  For example, when a plurality of information communication services are provided by using one type of bearer, for example, there is a case where it is desired to transmit information specifying the side that has transmitted the information to the side that receives the information. In particular, in the case of various call services such as a transceiver call, which is an example of an information communication service that has been put into practical use in recent years, there is a case where it is desired to transmit information separately from the conventional one-to-one call service.

  However, when the above conventional technique is applied as it is, information notified as an incoming call notification is limited to information such as a call origination and a telephone number for identifying a calling-side wireless communication terminal. Further, if a bearer is used to specify which call service is called in the mobile communication network, any call service is specified as packet communication, and the above-described transceiver call cannot be distinguished and transmitted.

  The present invention has been made in view of such problems, and in a call service controlled by an application layer using packet communication, an incoming call notification including service specifying information for specifying the call service is received on the called side. It is an object to enable notification to a wireless communication terminal.

The call control server of the present invention is a call control server that controls outgoing and incoming calls at an application layer in a call service using packet communication between wireless communication terminals, and is a calling side wireless communication that is a calling side Information receiving means for receiving call request information including first identification information for identifying a terminal and second identification information for identifying a callee wireless communication terminal that is a callee from the caller wireless communication terminal; , Based on the second identification information, the location information acquisition means for acquiring the location information indicating whether the called wireless communication terminal is in the presence or absence state, Notification generating means for generating an incoming call notification including service specifying information for specifying a call service and first specifying information for specifying a calling radio communication terminal for a called radio communication terminal indicated as being; Incoming call notification And a notification output means for outputting to the wireless communication terminal, call service is composed of a plurality of individual call service, the call request information, individual call services to be utilized calling wireless communication terminal that contains service identification information for identifying the.

According to the call control server of the present invention, when the notification output means outputs the incoming call notification to the callee wireless communication terminal, the incoming call notification includes service specifying information for specifying the called call service. be able to. Thus, for example, when a user using a wireless communication terminal makes a call to the wireless communication terminal while the wireless communication terminal used by the user is out of service area, the user uses the call service used for the call. It can be grasped by the incoming call notification. Further, according to the call control server of the present invention, the notification output means sends the incoming call notification including the service specifying information based on the call request information including the service identification information for identifying the individual call service. Can be output to Therefore, even when the call service is composed of a plurality of individual call services, the individual call service used when the call is made can be specified by the service identification information.

  In the call control server of the present invention, the service identification information and the service identification information are preferably the same information.

  According to this preferred aspect, the incoming call notification including the service identification information included in the call request information as it is as the service specifying information is output to the called wireless communication terminal, so that the incoming / outgoing call processing in the mobile communication network is performed. The load can be reduced.

  In the call control server of the present invention, the first identification information and the first specific information are preferably the same information.

  According to this preferred aspect, the incoming call notification including the first identification information included in the call request information as it is as the first specific information is output to the callee wireless communication terminal. The processing load can be reduced.

  In the call control server according to the present invention, it is preferable that the incoming notification includes service specifying information for specifying a call service that can be called at the calling side and called side wireless communication terminals.

  According to this preferable aspect, the incoming call notification can include service specifying information for specifying a call service that can be called at the calling side and called side wireless communication terminals. Therefore, for example, when the user makes a return call based on the incoming call notification, it is possible to make a call by selecting a call service in which the called wireless communication terminal can be called.

The call control method of the present invention includes first identification information for identifying a calling-side radio communication terminal that is a calling side, and second identification information for identifying a called-side radio communication terminal that is a calling side. Based on the information receiving step of receiving call request information from the calling wireless communication terminal and the second identification information, it is determined whether the called wireless communication terminal is in a service area state or a non-service area state. A location information acquisition step for acquiring the location information to be indicated; service identification information for identifying the call service for the called-side wireless communication terminal indicated to be absent by the location information; comprising a notification generation step of generating an incoming notification including the first identification information identifying the called side wireless communication terminal, and a notification output step of outputting toward the incoming notification to the called wireless communication terminal, call Services are multiple individual call services Are al configuration, call request information is characterized Rukoto contains service identification information for identifying the individual call service calling wireless communication terminal is to use.

According to the call control method of the present invention, when the incoming notification is output to the called wireless communication terminal by the notification output step, the incoming notification includes service specifying information for specifying the called call service. be able to. Thus, for example, when a user using a wireless communication terminal makes a call to the wireless communication terminal while the wireless communication terminal used by the user is out of service area, the user uses the call service used for the call. It can be grasped by the incoming call notification. Further, according to the call control method of the present invention, in the notification output step, an incoming call notification including service specifying information is sent based on call request information including service identification information for identifying an individual call service. Can be output to Therefore, even when the call service is composed of a plurality of individual call services, the individual call service used when the call is made can be specified by the service identification information. The call control server of the present invention is a call control server that controls calling and incoming calls in an application layer in a call service using packet communication between wireless communication terminals, and is a calling side that is a calling side Information reception for receiving call request information including first identification information for identifying a radio communication terminal and second identification information for identifying a callee radio communication terminal that is a callee from the caller radio communication terminal And, based on the second identification information, the area information acquisition means for acquiring area information indicating whether the called wireless communication terminal is in the area presence state or the absence area state from the subscriber information server; An incoming call notification including service identification information for identifying a call service and first identification information for identifying a calling-side radio communication terminal for a called-side radio communication terminal indicated as being out-of-range by the presence-area information Generate notification And a notification output means for outputting an incoming call notification to the called-side wireless communication terminal, and the in-zone information obtaining means is a communication service that can be used by each of the calling-side and called-side wireless communication terminals. The location information including the possible communication service information which is the information of the communication information is acquired, and the notification generation unit generates an incoming notification including the possible communication service information. In the call control server of the present invention, the call service is composed of a plurality of individual call services, and the call request information is a service identification for identifying an individual call service to be used by the calling-side wireless communication terminal. It is also preferable that information is included. In the call control server of the present invention, the service identification information and the service identification information are preferably the same information. In the call control server of the present invention, it is also preferable that the first identification information and the first specific information are the same information. The call control method of the present invention is a call control method for controlling outgoing and incoming calls in an application layer in a call service using packet communication between wireless communication terminals, wherein the calling side is a calling side. Information reception for receiving call request information including first identification information for identifying a radio communication terminal and second identification information for identifying a callee radio communication terminal that is a callee from the caller radio communication terminal A location information acquisition step for acquiring from the subscriber information server location information indicating whether the called wireless communication terminal is in the presence state or in the absence state based on the second identification information; An incoming call notification including service identification information for identifying a call service and first identification information for identifying a calling-side radio communication terminal for a called-side radio communication terminal indicated as being out-of-range by the presence-area information Generate A communication service that can be used by the calling side and the called side wireless communication terminals, respectively, and a notification output step for outputting an incoming notification to the called side wireless communication terminals. The location information including the possible communication service information, which is information on the information, is acquired, and the notification generation step generates an incoming notification including the possible communication service information.

  When the user who uses the wireless communication terminal makes a call to the wireless communication terminal while the wireless communication terminal used by the user is outside the service area, the speech control server uses the call service used for the call. Can be output from the incoming call notification.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  FIG. 1 is a network configuration diagram in which a call control server according to the present invention is arranged. The network 110 includes a call control server 100, an HSS (Home Subscriber Server) 101, a packet network 102, a wireless communication terminal 103, and an SMS (Short Message Service) server 104. The call control server 100, the HSS 101, the wireless communication terminal 103, and the SMS server 104 are connected to the packet network 102, and are configured to be able to communicate with each other by control based on IP (Internet Protocol). Note that the wireless communication terminal 103 does not always need to be connected to the packet network 102.

  The wireless communication terminal 103 is a mobile phone having a packet communication function and adopts the IMT-2000 system, which is one of CDMA (Code Division Multiple Access) systems. However, a system such as GPRS (General Packet Radio Service) is also available. Various methods that can be used and can perform packet communication are appropriately adopted.

  The packet network 102 is a core network having a packet switching function. For example, the IMT2000 system is employed, but various core networks having a packet switching function are appropriately employed.

  The SMS server 104 is a server that controls SMS, and exchanges SM (Short Message) based on SMPP (Short Message Peer-to-Peer Protocol). The destination in the SM is specified by a telephone number. The transmitted SM is once transmitted to the SMS server 104. Thereafter, the SM is transmitted from the SMS server 104 to the destination. When the wireless communication terminal 103 designated by the destination is in the out-of-service state, the SM is retransmitted after entering the in-service state. In addition to the destination, the SM includes a message part including an arbitrary character string.

  The HSS 101 has subscriber information as a database. In this database, identification information (for example, SIP-URI described later) for identifying each wireless communication terminal 103 used by each user, and a location indicating whether the wireless communication terminal 103 is connected to a base station (not shown). Information is linked.

  Note that the wireless communication terminal 103 that is not connected to any base station (not shown) and is determined not to be in the area is recorded in the database as having the area information being in a non-area state. The location information may include a base station name associated with the base station or a base station ID. In addition, the database is updated each time the location state in the wireless communication terminal 103 changes.

  In the present embodiment, description will be given by exemplifying that a call service based on IP between the wireless communication terminals 103 is provided using the network 110. Examples of the call service include individual call services such as a PoC (Push-to-Talk over Cellular) call service which is a transceiver call, a VoIP (Voice over Internet Protocol) call service, and a voice conference service.

  In this call service, the call control server 100 is a call control server that controls incoming and outgoing calls between the wireless communication terminals 103. The incoming / outgoing call control itself uses SIP (Session Initiation Protocol), but is not limited to SIP.

  The call control server 100 may be a call control server that exclusively processes incoming / outgoing call control in one individual call service, or call control in a plurality of individual call services such as the PoC call service, the VoIP call service, and the voice conference call service. It may be a call control server for processing.

  In call service and call control, the wireless communication terminal 103 is identified by a SIP-URI (Session Initiation Protocol-Uniform Resource Identifier). The SIP-URI can uniquely identify the wireless communication terminal 103 in communication based on IP in the network 110. SIP-URI is 090XXXXXXX @ operator. It takes the form of combining a telephone number and a domain name with an @ mark, such as net, but the telephone number may be a simple character string. In the call service, information for identifying the wireless communication terminal 103 is not limited to the SIP-URI, and it is only necessary that the wireless communication terminal 103 can be identified in the network 110. For example, an IP address can be considered as information for identifying the wireless communication terminal.

  Next, the call control server 100 will be described. As shown in FIG. 2, the call control server 100 includes a CPU (Central Processing Unit) 201, a RAM (Random Access Memory) 203 and a ROM (Read Only Memory) 204, which are main storage devices, an auxiliary storage device 202 such as a hard disk, In addition, it is configured as a computer (or computer system) including hardware such as a communication module 205 which is a data transmission / reception device such as a network card. The functions described below of the call control server 100 are exhibited by the operation of these components.

  Next, the functional configuration of the call control server 100 will be described. As shown in FIG. 3, the call control server 100 includes an information receiving unit 301 (information receiving unit), an in-zone information acquiring unit 302 (in-zone information acquiring unit), and a notification output unit 303 (notification output unit). . The information receiving unit 301, the location information acquiring unit 302, and the notification output unit 303 are each connected to the packet network 102.

  A specific function of the call control server 100 will be described together with the operation of the call control server 100 with reference to FIG. Hereinafter, in the case of a call in a certain call service, SIP-URI for identifying the wireless communication terminal 431 which is a calling side wireless communication terminal is designated as 0905555XXXX @ operator. net, SIP-URIs for identifying the wireless communication terminals 432, 433, and 434 which are called wireless communication terminals are respectively designated as 0901111XXXX @ operator. net, 0901111YYYY @ operator. net, 090111ZZZZ @ operator. Let it be net. Note that all of the wireless communication terminals 431 to 434 are wireless communication terminals equivalent to the wireless communication terminal 103 in FIG.

  In step S <b> 410, the wireless communication terminal 431 transmits call request information to the call control server 100. The call request information takes the form of an INVITE signal which is information for requesting a call in SIP, but is not limited to the INVITE signal.

  The call request information includes a SIP-URI that identifies the wireless communication terminal 431 that is the calling wireless communication terminal, and a SIP that identifies the wireless communication terminals 432, 433, and 434 that are the wireless communication terminals that are requested to receive the call. -Includes all URIs. Further, when the call control server 100 has a configuration capable of processing call control in a plurality of individual call services, the call request information includes service identification information that is a specific character string for identifying the individual call service. It is. Note that even when the call control server 100 exclusively processes incoming / outgoing call control in one individual call service, the call identification information may include service identification information.

  In step S <b> 401, the information receiving unit 301 receives call request information transmitted from the wireless communication terminal 431.

  Next, in step S402, the location information acquisition unit 302 analyzes the call request information received in step S401, and the radio communication terminals 432 to 434, which are call-side radio communication terminals included in the call request information. SIP-URI that identifies the URL is extracted. According to the above example, 0901111XXXX @ operator. net, 0901111YYYY @ operator. net and 0901111ZZZZ @ operator. net is extracted. Note that the SIP-URI (0905555XXXX@operator.net according to the above example) that identifies the wireless communication terminal 431 that is the calling-side wireless communication terminal may also be extracted at the same time.

  If the identification information for identifying the wireless communication terminal 103 included in the call request information is not SIP-URI, the identification information is extracted.

  Next, in step S403, the location information acquisition unit 302 creates location confirmation information including the SIP-URI extracted in step S402 as a list. The location confirmation information is information requesting the HSS 101 to inquire whether or not the wireless communication terminal identified by the SIP-URI included in the list is in the location state. The list need not be SIP-URI, and may be identification information that can identify the wireless communication terminal 103. For example, a telephone number that can be extracted from the SIP-URI may be used.

  Next, in step S <b> 404, the location information acquisition unit 302 transmits the location confirmation information created in step S <b> 403 to the HSS 101. In step S411, the HSS 101 receives the location confirmation information.

  The HSS 101 identifies whether the wireless communication terminals 432 to 434 identified by each SIP-URI in the list are in the presence state or the absence state by referring to the subscriber information database. The location result information illustrated is created. Similarly, when the list in the location confirmation information includes a telephone number as an element, the wireless communication terminals 432 to 434 identified by each telephone number in the list are also in the presence status by referring to the subscriber information database. Or whether it is in the absence zone state.

  FIG. 6 is a modification of the location result information. In the modification, 0905555XXXX @ operator. The location information of the wireless communication terminal 431 that is the calling-side wireless communication terminal identified by the net is also included. In step S403, the location information in the wireless communication terminal 431 can be specified by including in the list the SIP-URI that identifies the wireless communication terminal 431 extracted in step S402.

  Further, in the HSS 101, in the subscriber information database, the wireless communication terminal 103 and possible communication service information that is information on communication services that can be used by the wireless communication terminal 103 may be associated with each other. The possible communication service information corresponding to each of 434 may be included in the location result information 419. FIG. 6 is also an example of location result information including possible communication service information. Note that the communication service may include not only an individual call service but also a mail service, a third party search service, a voice telephone service using a voice call switching network, an answering machine service, and the like.

  Further, there is a case where a base station (not shown) having the wireless communication terminal 103 under control has communication service information that can be used by the wireless communication terminal 103. In this case, when the HSS 101 inquires the base station for communication service information, the HSS 101 can include the possible communication service information in the location result information.

  Next, in step S <b> 412, the HSS server 101 transmits the location result information to the location information acquisition unit 302 in the call control server 100. Next, in step S405, the location information acquisition unit 302 receives the location result information.

  Next, in step S406, the notification output unit 303 creates service specifying information for identifying the individual call service requested for calling by the call request information. FIG. 7 is an example of an incoming call notification output by the call control server. For example, in FIG. 7, a character string “PoC” corresponds to the service specifying information. When the service identification information is included in the call request information, the service identification information is created based on the service identification information. The service identification information may use the service identification information as it is.

  Note that when the call control server 100 exclusively handles incoming / outgoing call control in one individual call service, since the call control server has one individual call service that performs call control, the service specifying information is the call request information. It can be uniquely identified regardless of information.

  Next, in step S407, the notification output unit 303 transmits to the SMS server 104 SM, which is an incoming call notification addressed to the telephone number of the wireless communication terminal that is indicated as being out of service by the presence result information. According to the above example, the SM is created and notified with the destinations as 090-1111-YYYY and 090-1111-ZZZ, respectively. FIG. 7 shows an example of an SM whose destination is 090-1111-YYYY.

  The SM in FIG. 7 includes a telephone number (090-5555-XXXX) for identifying the wireless communication terminal 431 and the service specifying information (PoC). In addition, the telephone number that identifies the wireless communication terminal 431 that is the destination in the SM is a SIP-URI that identifies the wireless communication terminal 431, 0905555XXXX @ operator. Created based on net.

  Note that a SIP-URI for identifying the wireless communication terminal 431 may be used instead of the telephone number for identifying the wireless communication terminal 431 in the SM. In this case, the SMS server 104 may be configured to rewrite the SIP-URI with the telephone number. In addition, the SM may include a SIP-URI or a telephone number for identifying the wireless communication terminals 432 to 434 that are called sides.

  Further, the notification output unit 303 may output the SM illustrated in FIG. 8 based on the location result information described in FIG. That is, identification information (09905555XXXX@operator.net in FIG. 8) for identifying the wireless communication terminal 431 that is the calling side and the individual call that has been made are indicated in the message portion 801 that describes that there is an incoming call. Service identification information for identifying the service and identification information for identifying the wireless communication terminals 432, 433, and 434 on the called side (refer to FIG. 8, 090111XXXXXX operator. .Net) and the possible communication service information (“PoC”, “VoIP”, and “Conference” in FIG. 8) that the wireless communication terminals 432, 433, and 434 can use are called. Time and at the called wireless communication terminal (Referred to in FIG. 8, "Absence sphere", and "serving") each serving information, it may be included.

  The time when the call is made is the time when the call is received by the message unit 801 by recording the reception time when the information receiving unit received the call request information and holding it in the notification output unit. Can be included.

  In step S413 and step S414, the SM is transmitted to the SMS server, and in step S415 and step S416, the SMS server transmits the received SM to the wireless communication terminals 433 and 434 that are the respective destinations.

  FIG. 9 is a display screen displaying SM in the wireless communication terminal that has received SM in FIG. Similarly, FIG. 10 is a display screen displaying SM in the wireless communication terminal that has received SM in FIG. The SIP-URI or telephone number in the SM is displayed by converting the SIP-URI or telephone number into a name or the like registered in the telephone book by referring to the telephone book in the wireless communication terminal. Yes.

It is a network block diagram which arrange | positions a call control server. It is a block diagram in a call control server. It is a functional block diagram in a call control server. It is a flowchart in the network which arrange | positions a call control server. This is location result information transmitted by the HSS to the call control server. This is location result information transmitted by the HSS to the call control server. It is an example of the incoming call notification which a call control server outputs. It is an example of the incoming call notification which a call control server outputs. It is an example of the display screen in the incoming call notification received by the wireless communication terminal. It is an example of the display screen in the incoming call notification received by the wireless communication terminal.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Call control server, 101 ... HSS, 102 ... Packet network, 103 ... Wireless communication terminal, 104 ... SMS server, 110 ... Network, 201 ... CPU, 202 ... Input device, 203 ... Memory, 204 ... Storage device, 205 ... Transmission / reception device, 206 ... Display device, 207 ... Reading device, 208 ... Recording medium, 209 ... Bus, 301 ... Information reception unit, 302 ... Location information acquisition unit, 303 ... Notification output unit, 417 ... Call request information, 418 ... Registration confirmation information, 419 ... Regional result information, 420 ... Incoming notification, 421 ... Incoming notification, 422 ... Incoming notification, 423 ... Incoming notification, 800 ... SM, 801 ... Message part.

Claims (10)

In a call control server that controls outgoing and incoming calls at an application layer in a call service using packet communication between wireless communication terminals,
Calling request information including first identification information for identifying a calling-side radio communication terminal that is a calling side and second identification information for identifying a called-side radio communication terminal that is a calling side Information receiving means for receiving from the side wireless communication terminal;
Based on the second identification information, area information acquisition means for acquiring area information indicating whether the called wireless communication terminal is in an in-service area state or in an in-service area state;
With respect to the called side wireless communication terminal indicated as being out of service area by the location information, service specifying information for specifying the call service and first specifying information for specifying the calling side wireless communication terminal Notification generating means for generating an incoming notification including:
A notification output means for outputting the incoming call notification to the called wireless communication terminal;
Equipped with a,
The call service is composed of a plurality of individual call services,
The call request information, the call control server, wherein Rukoto contains service identification information for identifying the individual call service where the calling wireless communication terminal is to use. The call control server according to claim 1 , wherein the service identification information and the service specifying information are the same information. The call control server according to claim 1 or 2 , wherein the first identification information and the first specific information are the same information. The incoming call to the notification, characterized in that includes the service identification information for identifying a communication service call is possible in the calling and the called wireless communication terminal, to any one of claims 1 to 3 Call control server described in 1. In a call control method for controlling outgoing and incoming calls in an application layer in a call service using packet communication between wireless communication terminals,
Calling request information including first identification information for identifying a calling-side radio communication terminal that is a calling side and second identification information for identifying a called-side radio communication terminal that is a calling side Information receiving step received from the side wireless communication terminal;
Based on the second identification information, a location information acquisition step of acquiring location information indicating whether the called wireless communication terminal is in a location state or in an absence range state;
With respect to the called side wireless communication terminal indicated as being out of service area by the location information, service specifying information for specifying the call service and first specifying information for specifying the calling side wireless communication terminal A notification generation step for generating an incoming notification including:
A notification output step of outputting the incoming call notification toward the called wireless communication terminal;
Equipped with a,
The call service is composed of a plurality of individual call services,
The call request information, the call control method according to claim Rukoto contains service identification information for identifying the individual call service where the calling wireless communication terminal is to use. In a call control server that controls outgoing and incoming calls at an application layer in a call service using packet communication between wireless communication terminals,
Calling request information including first identification information for identifying a calling-side radio communication terminal that is a calling side and second identification information for identifying a called-side radio communication terminal that is a calling side Information receiving means for receiving from the side wireless communication terminal;
Based on the second identification information, area information acquisition means for acquiring area information indicating whether the called wireless communication terminal is in an in-service area state or an out-of-area state from a subscriber information server ;
With respect to the called side wireless communication terminal indicated as being out of service area by the location information, service specifying information for specifying the call service and first specifying information for specifying the calling side wireless communication terminal Notification generating means for generating an incoming notification including:
A notification output means for outputting the incoming call notification to the called wireless communication terminal;
Equipped with a,
The location information acquisition means acquires the location information including possible communication service information that is information about a communication service that can be used by each of the calling side and called side wireless communication terminals,
Said notification generation unit, call control server which is characterized that you generate the incoming call notice including the possible communication service information. The call service is composed of a plurality of individual call services,
The call control server according to claim 6 , wherein the call request information includes service identification information for identifying an individual call service to be used by the caller wireless communication terminal. The call control server according to claim 7 , wherein the service identification information and the service specifying information are the same information. The call control server according to any one of claims 6 to 8 , wherein the first identification information and the first specific information are the same information. In a call control method for controlling outgoing and incoming calls in an application layer in a call service using packet communication between wireless communication terminals,
Calling request information including first identification information for identifying a calling-side radio communication terminal that is a calling side and second identification information for identifying a called-side radio communication terminal that is a calling side Information receiving step received from the side wireless communication terminal;
Based on the second identification information, a location information acquisition step of acquiring location information indicating whether the called wireless communication terminal is in a location state or in an absence range state from a subscriber information server ;
With respect to the called side wireless communication terminal indicated as being out of service area by the location information, service specifying information for specifying the call service and first specifying information for specifying the calling side wireless communication terminal A notification generation step for generating an incoming notification including:
A notification output step of outputting the incoming call notification toward the called wireless communication terminal;
Equipped with a,
The in-zone information acquisition step acquires the in-zone information including possible communication service information that is information about a communication service that can be used by each of the calling side and called side wireless communication terminals,
The notification generation step, call control method characterized that you generate the incoming call notice including the possible communication service information.

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