JP4951426B2 - COMMUNICATION CONTROL DEVICE, COMMUNICATION CONTROL METHOD, AND COMMUNICATION CONTROL SYSTEM - Google Patents

Description

  The present invention relates to a communication control apparatus, a communication control method, and a communication control system for performing communication control of a mobile communication terminal moving from a first mobile communication network to a second mobile communication network.

  Non-Patent Document 1 describes the specification of IMS (IP Multimedia core network Subsystem) defined in 3GPP (3rd Generation Partnership Project), which is a standardization project for third generation (3G) mobile communication systems.

In this IMS, a mobile communication terminal can roam from an IMS network (IMS network domain) as a home network to an IMS network as another network. Then, the roaming destination IMS network obtains the subscriber profile of the mobile communication terminal from the roaming source IMS network, thereby performing location registration of the roaming mobile communication terminal.
3GPP TS 23.228 V7.5.0 (2006-09), 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; IP Multimedia Subsystem (IMS); Stage 2 (Release 7), [Search May 2, 2007], Internet <http://www.3gpp.org/ftp/Specs/archive/23_series/23.228/23228-750.zip>

  By the way, since the IMS network and the CS (Circuit Switch) network (CS network domain) are different in network type, the location registration method of the mobile communication terminal performed when roaming is different. Therefore, conventionally, a user who has contracted only with the CS network (a mobile communication terminal in a network operator that provides only CS) cannot communicate with the IMS network. Therefore, it is necessary to provide both the IMS network and the CS network in the roaming destination network, and there is a problem that double development and double capital investment are required, which is inefficient.

  Therefore, an object of the present invention is to provide a communication control device, a communication control method, and a communication control system that can perform communication of a mobile communication terminal over different types of mobile communication networks.

Communication control apparatus according to the present invention, the second mobile communication is a roaming network of a mobile communication terminal adapted only to the mobile communication network of the first mobile communication network and the home network and the circuit switched network is a circuit switching network In a communication control device provided in a network and performing communication control of a mobile communication terminal in a second mobile communication network , the second mobile communication network has at least a core network as an IMS network and is in the second mobile communication network A location registration accepting means for accepting a location registration request from the mobile communication terminal; and a location registration accepting means for converting the location registration request accepted from the mobile communication terminal into a signal form in the first mobile communication network. And a location registration executing means for performing location registration of the mobile communication terminal in the network location management device and acquiring user information of the mobile communication terminal from the first mobile communication network.

The communication control method according to the present invention, the second is a roaming network of a mobile communication terminal adapted only to the mobile communication network of the first mobile communication network and the home network and the circuit switched network is a circuit switching network In a mobile communication network, in a communication control method for performing communication control of a mobile communication terminal in a second mobile communication network, at least the core network is an IMS network and the second mobile communication network is in the second mobile communication network. A location registration accepting step for accepting a location registration request from the mobile communication terminal, and converting the location registration request accepted from the mobile communication terminal into the signal form in the first mobile communication network in the location registration accepting step A location registration executing step of performing location registration of the mobile communication terminal in the network location management device and acquiring user information of the mobile communication terminal from the first mobile communication network. The features.

The communication control system according to the present invention, a mobile communication terminal adapted only to the first mobile communication network, mobile communication network of the first mobile communication network and the home network and the circuit switched network is a circuit switching network And a second mobile communication network that is a roaming network of the mobile communication terminal , the first mobile communication network includes user information holding means for holding user information of the mobile communication terminal, User information transmitting means for transmitting user information to the second mobile communication network based on a request from the mobile communication network, and the second mobile communication network has at least a core network as an IMS network, Location registration accepting means for accepting a location registration request from a mobile communication terminal in the mobile communication network, and converting the location registration request accepted by the location registration acceptance means from the mobile communication terminal into a signal carrying in the first mobile communication network And a location registration executing means for performing location registration of the mobile communication terminal in the location management device of the first mobile communication network and acquiring user information of the mobile communication terminal from the first mobile communication network. And

In the communication control device, the communication control method, and the communication control system according to the present invention, in the second mobile communication network, the location registration request received from the mobile communication terminal received by the location registration receiving means is transmitted as a signal in the first mobile communication network. The mobile communication terminal is registered in the position registration device of the first mobile communication network after conversion into a form, and user information of the mobile communication terminal is acquired from the first mobile communication network. As described above, according to the present invention, it is possible to perform location registration of a mobile communication terminal suitable only for a mobile communication network of a circuit switching network in which at least a core network is moved to a second mobile communication network which is an IMS network. The mobile communication terminal can communicate with the mobile communication network of the IMS network , which is different from the home network, and provides the service to the mobile communication terminal based on the user information in the second mobile communication network. It becomes possible to do.

  Moreover, it is preferable to further have a routing information transmission means for transmitting routing information to the second mobile communication network to the first mobile communication network. According to this communication control device, routing information from the first mobile communication network to the second mobile communication network is performed by transmitting routing information to the second mobile communication network to the first mobile communication network. Can do. Thereby, for example, it is possible to perform incoming call control to a roaming mobile communication terminal.

  In addition, when there is a user information storage unit that stores user information acquired by the location registration execution unit and a location information request of the mobile communication terminal from the second mobile communication network, the user information stored in the user information storage unit Based on the above, it is preferable to further include a location information transmitting means for transmitting the location information of the mobile communication terminal. According to this communication control apparatus, the user information of the mobile communication terminal acquired from the first mobile communication network is stored, and thereafter the location information of the mobile communication terminal is grasped in the second mobile communication network. can do. Therefore, it is possible to respond to the location information request of the mobile communication terminal located in the second mobile communication network. Thereby, for example, it is possible to perform incoming call control to a roaming mobile communication terminal.

  According to the present invention, mobile communication terminals can communicate with each other using different types of mobile communication networks.

  Hereinafter, a communication control device, a communication control method, and a communication control system according to embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the communication control apparatus according to the present invention is applied to HSS-GW. In addition, in each figure, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted.

  First, the configuration of the communication control system according to the present embodiment will be described. FIG. 1 is a diagram showing a configuration of a communication control system according to an embodiment of the present invention.

  As shown in the figure, a communication control system 1 according to this embodiment includes a mobile communication terminal 2 and a mobile communication terminal 3, a home network 4 that is a home network of the mobile communication terminal 2 and the mobile communication terminal 3, and a mobile communication terminal. 2 and a roaming network 5 which is a roaming network 2.

  The mobile communication terminal 2 and the mobile communication terminal 3 are 3G terminals such as mobile phones using the home network 4 as a home network. The mobile communication terminal 2 is roaming to the roaming network 5.

  The home network 4 is a 3G network (3G network domain), and is connected to another network via a GMSC (Gateway Mobile Switching Center) 6 which is a gateway exchange of the home network 4. The home network 4 includes an RNC (Radio Network Controller) 7 that establishes a 3G wireless connection with a mobile communication terminal located in the home network 4, and an MSC (Mobile Switching Center) that performs wireless communication with the mobile communication terminal. ) / VLR (Visitor Location Register) 8 and an HLR (Home Location Register) 9 for managing location registration information and subscriber profiles of mobile communication terminals using the home network 4 as a home network.

  The roaming network 5 is configured by an access network 11 of a 3G network, a core network 12 of an IMS network, and an interwork device 13 that interconnects the access network 11 and the core network 12. The roaming network 5 is connected to other networks via an MGCF (Media Gateway Control Function) 14 that performs conversion between IMS and 3G and a representative GMSC 15 of the roaming network 5.

  The interworking device 13 of the roaming network 5 performs communication protocol conversion between 3G and IMS, and transmits and receives signals between the access network 11 and the core network 12. When the interwork device 13 receives the location registration request from the mobile communication terminal, the mobile communication terminal is a user who uses the roaming network 5 as a home network or a roaming-in user who roams to the roaming network 5. It is determined whether.

  The access network 11 includes an RNC 16 that establishes a 3G wireless connection with the mobile communication terminal 2. The core network 12 of the roaming network 5 includes an S-CSCF (Serving Cell Session Control Function) 17, an I-CSCF (Interrogating Cell Session Control Function) 18, an HSS (Home Subscriber Server) 19, and an HSS-GW (Home Subscriber Server). Gateway) 20.

  The S-CSCF 17 is a logical node that performs registration of the mobile communication terminal 2 and call session control as a SIP (Session Initiation Protocol) server. The I-CSCF 18 is a logical node having a gateway function with another network. Then, the I-CSCF 18 acquires the location information of the mobile communication terminal 2 from the HSS 19 and the HSS-GW 20 at the time of a connection request from the other network to the mobile communication terminal 2, and performs call session control of the mobile communication terminal 2. -CSCF 17 is selected, and this S-CSCF 17 is caused to perform call session control of the mobile communication terminal 2. The HSS 19 is a server that manages a subscriber profile of a mobile communication terminal that uses the roaming network 5 as a home network.

  The HSS-GW 20 is a server that manages a subscriber profile of the mobile communication terminal 2 that is a roaming-in user of the roaming network 5.

  As shown in FIG. 2, the HSS-GW 20 functionally includes a roaming-in-user location registration receiving unit 21, a roaming-in-user other-network location registration executing unit 22, a roaming-in-user subscriber profile storage unit 23, And a roaming-in-user incoming reception unit 24.

  As shown in FIG. 3, the HSS-GW 20 physically includes a CPU 201, a ROM 202, a RAM 203, an auxiliary storage device 204, a communication module 205 that controls communication, and an operation unit 206 that is an input device. And a display 207 as an output device. Each function described in FIG. 2 operates the communication module 205 under the control of the CPU 201 by reading predetermined computer software onto the CPU 201 and the RAM 203 shown in FIG. This is realized by reading and writing data.

  The roaming-in-user location registration receiving unit 21 performs communication with the core network 12 of the roaming network 5 using the IMS communication protocol.

  More specifically, the roaming-in-user location registration accepting unit 21 accepts a Resiger, which is an IMS location registration request, from the interworking device 13 at the time of location registration of the mobile communication terminal 2, and sends this Resulator to the roaming-in-user other network. It transmits to the location registration execution part 22. Then, when the location registration of the mobile communication terminal 2 is completed, the roaming-in-user location registration receiving unit 21 transmits a response indicating that the location registration is completed to the interwork device 13.

  In addition, when the roaming-in-user location registration receiving unit 21 receives an inquiry about the location information of the mobile communication terminal 2 from the I-CSCF 18 at the time of the incoming call to the mobile communication terminal 2, the roaming-in-user location registration receiving unit 21 An instruction to read the subscriber profile of the mobile communication terminal 2 stored in the in-user subscriber profile storage unit 23 is given. When the roaming-in-user location registration receiving unit 21 reads the subscriber profile from the roaming-in-user subscriber profile storage unit 23 via the roaming-in-user incoming call receiving unit 24, the roaming-in-user location registration receiving unit 21 calls the mobile communication terminal 2 from the subscriber profile. The S-CSCF number of the S-CSCF 17 that performs the session is acquired. Then, this S-CSCF number is transmitted as a response to the I-CSCF 18. Note that the roaming-in-user location registration receiving unit 21 determines that the mobile communication terminal 2 is connected to the roaming network 5 with respect to the I-CSCF 18 when the subscriber profile of the mobile communication terminal 2 does not exist in the roaming-in-user subscriber profile storage unit 23. Sends a response that does not exist.

  The location registration execution unit 22 for roaming-in-user other networks communicates with the home network 4 using a 3G communication protocol.

  More specifically, the location registration executing unit 22 for roaming-in-user other networks converts the Resister transmitted from the roaming-in-user location registration receiving unit 21 into a 3G location registration request. Then, the location registration execution unit 22 for the roaming-in-user other network transmits the 3G location registration request and the HSS-GW number of the own HSS-GW to the HLR 9 of the home network 4. Then, the roaming-in-user other-network location registration execution unit 22 acquires the subscriber profile of the mobile communication terminal 2 transmitted from the HLR 9 and stores this subscriber profile in the roaming-in-user subscriber profile storage unit 23. Then, the location registration executing unit 22 for roaming-in-user other network transmits to the roaming-in-user location registration receiving unit 21 that the location registration of the mobile communication terminal 2 is completed.

  The roaming-in-user subscriber profile storage unit 23 is a storage unit that stores the subscriber profile of the mobile communication terminal 2 acquired by the location registration execution unit 22 for roaming-in-user other networks.

  The roaming-in-user incoming reception unit 24 performs incoming control from the home network 4 to the mobile communication terminal 2.

  More specifically, the roaming in-user incoming call reception unit 24 holds the node number of the representative GMSC 15 connected to the roaming network 5. Then, when the roaming-in user incoming reception unit 24 receives a connection destination inquiry from the HLR 9 of the home network 4 to the mobile communication terminal 2, it generates an MSRN (Mobile Station Roaming Number) that is routing information. This MSRN is normally composed of the MSC node number and reference number, but in this embodiment, the representative GMSC 15 is used instead of the MSC, and the representative GMSC 15 node number and reference number. Then, the roaming-in-user incoming reception unit 24 transmits this MSRN to the HLR 9 as a response.

  When the roaming-in-user incoming call reception unit 24 receives an instruction to read the subscriber profile of the mobile communication terminal 2 from the roaming-in-user location registration reception unit 21, the roaming-in-user subscriber profile storage unit 23 receives the mobile communication terminal 2 And the subscriber profile is transmitted to the roaming-in-user location registration receiving unit 21.

  Next, the operation of the communication control system 1 according to the present embodiment will be described with reference to FIGS. 4 and 5. FIG. 4 is a sequence diagram showing a processing operation of the communication control system at the time of location registration of the mobile communication terminal, and FIG. 5 is a sequence diagram showing a processing operation of the communication control system at the time of an incoming call to the mobile communication terminal.

  First, the location registration operation of the mobile communication terminal 2 roaming to the roaming network 5 will be described with reference to FIG.

  When the mobile communication terminal 2 moves to the area of the roaming network 5, the mobile communication terminal 2 transmits a 3G location registration request to the interwork apparatus 13 via the RNC 16 of the access network 11 (step S1).

  The interworking device 13 converts this 3G location registration request into an IMS Resister. Then, the interwork apparatus 13 determines whether or not the mobile communication terminal 2 that has transmitted the location registration request is a roaming-in user from another network. When it is determined that the mobile communication terminal is not a roaming-in user, the interwork apparatus 13 transmits this Register to the HSS 19 and performs location registration processing of the mobile communication terminal within the roaming network 5.

  On the other hand, when it is determined that the mobile communication terminal 2 is a roaming-in user as in the present embodiment, the interworking device 13 transmits this Register to the HSS-GW 20 (step S2).

  Then, the roaming-in-user location registration receiving unit 21 of the HSS-GW 20 receives the Resister transmitted from the interworking device 13 and transmits this Resigter to the roaming-in-user other-network location registration executing unit 22.

  When receiving the Register, the roaming-in-user other-network location registration execution unit 22 converts this Resister into a 3G location registration request (step S3). Then, the 3G location registration request and the HSS-GW number of the local HSS-GW 20 are transmitted to the HLR 9 of the home network 4 (step S4).

  When the HLR 9 receives the 3G location registration request and the HSS-GW number, the HLR 9 registers the location of the mobile communication terminal 2. Then, the HLR 9 transmits the subscriber profile of the mobile communication terminal 2 to the HSS-GW 20 (step S5), and holds the received HSS-GW number.

  Next, when the location registration execution unit 22 for the roaming-in-user other network of the HSS-GW 20 acquires the subscriber profile of the mobile communication terminal 2 transmitted from the HLR 9, the subscriber profile is stored in the roaming-in-user subscriber profile storage unit. 23 (step S6). Then, the roaming-in-user other-network location registration execution unit 22 notifies the roaming-in-user location registration receiving unit 21 that the location registration in the HLR 9 has been completed and the subscriber profile has been acquired.

  When receiving the notification that the location registration is completed and the subscriber profile is acquired, the roaming-in-user location registration receiving unit 21 transmits a response to the Register to the interworking device 13 (step S7).

  And the interwork apparatus 13 will transmit a Register to S-CSCF17, if a response is received from the roaming in user location registration reception part 21 (step S8).

  Thereafter, normal location registration control by IMS is performed between the interwork device 13 and the core network 12, and normal location registration control by 3G is performed between the interwork device 13 and the access network 11. Then, the location registration process of the mobile communication terminal 2 is completed.

  Next, with reference to FIG. 5, an incoming call operation from the mobile communication terminal 3 located in the home network 4 to the mobile communication terminal 2 located in the roaming network 5 will be described.

  When the mobile communication terminal 3 makes a call to the mobile communication terminal 2, the calling number is notified to the GMSC 6 via the RNC 7 and the MSC / VLR 8 (step S11). Then, the GMSC 6 inquires of the HLR 9 about the connection destination to the mobile communication terminal 2 (step S12).

  Upon receiving the connection destination inquiry to the mobile communication terminal 2, the HLR 9 detects that the mobile communication terminal 2 is located in the roaming network 5 from the subscriber profile of the mobile communication terminal 2 managed by the HLR 9. A connection destination inquiry is transmitted with the HSS-GW number held at the time of location registration of the communication terminal 2 as the destination (step S13).

  When receiving the connection destination inquiry from the HLR 9, the roaming-in-user incoming reception unit 24 of the HSS-GW 20 generates an MSRN including the node number and reference number of the representative GMSC 15. Then, the roaming-in-user incoming call reception unit 24 transmits this MSRN as a response to the HLR 9 (step S14).

  Upon receiving the MSRN response, the HLR 9 transmits this response to the GMSC 6 (step S15). Then, the GMSC 6 routes to the representative GMSC 15 based on the MSRN, and transmits a connection request to the mobile communication terminal 2 to the I-CSCF 18 of the roaming network 5 via the MGCF 14 (step S16).

  When the I-CSCF 18 receives a connection request to the mobile communication terminal 2, the I-CSCF 18 transmits a location information inquiry of the mobile communication terminal 2 to the HSS-GW 20 (step S17).

  When receiving the location information inquiry, the roaming-in-user location registration receiving unit 21 of the HSS-GW 20 reads out the subscriber profile of the mobile communication terminal 2 from the roaming-in-user subscriber profile storage unit 23 (step S18). More specifically, the roaming-in-user location registration receiving unit 21 instructs the roaming-in-user incoming call receiving unit 24 to read out the subscriber profile of the mobile communication terminal 2 from the roaming-in-user subscriber profile storage unit 23. To do. In response to this instruction, the roaming-in-user incoming call reception unit 24 reads the subscriber profile of the mobile communication terminal 2 from the roaming-in-user subscriber profile storage unit 23 and transmits it to the roaming-in-user location registration reception unit 21.

  Then, the roaming-in-user location registration accepting unit 21 acquires the S-CSCF number of the S-CSCF 17 that performs the call session of the mobile communication terminal 2 from the read subscriber profile, and sends this S-CSCF 18 to the I-CSCF 18. The CSCF number is transmitted as a response (step S19).

  Next, the I-CSCF 18 transmits a connection request to the S-CSCF 17 corresponding to the received S-CSCF number, and transmits a connection request from the S-CSCF 17 to the mobile communication terminal 2 (step S20).

  Thereafter, normal call control is performed to establish a call session from the mobile communication terminal 3 to the mobile communication terminal 2.

  According to the present embodiment, when the roaming-in-user location registration receiving unit 21 receives a location registration request (Register) from the mobile communication terminal 2 roaming to the roaming network 5, the roaming-in-user location registration executing unit 22 for other networks. However, this location registration request is converted into a 3G location registration request and transmitted to the HLR 9 of the home network 4 to perform location registration of the mobile communication terminal 2 and from the home network 4 the subscriber profile of the mobile communication terminal 2 is obtained. get. Thereby, the location registration of the mobile communication terminal 2 using the home network 4 provided by 3G as the home network can be performed without adding a new function to the mobile communication terminal 2. For this reason, the mobile communication terminal 2 can communicate with the roaming network 5 provided by IMS, and further, the roaming network 5 can provide a service to the mobile communication terminal 2 based on the acquired subscriber information. It becomes possible.

  In addition, by sending the MSRN including the node number of the representative GMSC of the roaming network 5 to the HLR 9 of the home network 4, the routing from the home network 4 to the roaming network 5 can be performed, and the roaming network 5 is roaming. It is possible to control incoming calls to the mobile communication terminal 2.

  Further, by storing the subscriber profile of the mobile communication terminal 2 acquired from the HLR 9 of the home network 4 in the roaming-in-user subscriber profile storage unit 23 of the HSS-GW 20, the mobile communication is performed in the roaming network 5 thereafter. The location information of the terminal 2 can be grasped. As a result, when a location information request of the mobile communication terminal 2 located in the roaming network 5 is received from the I-CSCF 18, this location information can be responded, and the roaming to the roaming network 5 is performed. It is possible to control incoming calls to the communication terminal 2.

  As mentioned above, although this invention was concretely demonstrated based on the embodiment, this invention is not limited to the said embodiment. For example, in the above embodiment, the roaming network 5 in which the mobile communication terminal 2 roams has been described as being configured by the access network 11 provided by 3G and the core network 12 provided by IMS. The entire roaming network may be a network provided by IMS.

  In the above embodiment, the location registration execution unit 22 for roaming-in-user other networks has been described as performing communication protocol conversion between IMS and 3G. However, the roaming-in-user location registration receiving unit 21 performs communication protocol conversion. Further, the roaming-in-user location registration receiving unit 21 and the roaming-in-user other network location registration executing unit 22 may be integrated.

It is a figure which shows the structure of the communication control system which concerns on embodiment of this invention. It is a figure which illustrates the function structure of HSS-GW. It is a figure which illustrates the hardware constitutions of HSS-GW. It is a sequence diagram which shows the processing operation of the communication control system at the time of the position registration of a mobile communication terminal. It is a sequence diagram which shows the processing operation of the communication control system at the time of the incoming call to a mobile communication terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Communication control system, 2 ... Mobile communication terminal, 4 ... Home network (1st mobile communication network), 5 ... Roaming network (2nd mobile communication network), 20 ... HSS-GW (communication control apparatus), 21 ... roaming-in-user location registration receiving unit (location registration receiving unit, location information transmitting unit), 22 ... roaming-in user location registration execution unit (location registration executing unit) for other networks, 23 ... roaming-in-user subscriber profile storage unit (User information storage means), 24... Roaming in user incoming reception section (routing information transmission means).

Claims (5)

Provided to the second mobile communication network is a roaming network of a mobile communication terminal to adapt the first mobile communication network is a circuit switching network only the home network and to and the mobile communication network of the circuit switching network to the second In a communication control device that performs communication control of the mobile communication terminal in a mobile communication network ,
In the second mobile communication network, at least a core network is an IMS network,
Location registration receiving means for receiving a location registration request from the mobile communication terminal in the second mobile communication network;
The location registration accepting unit converts the location registration request received from the mobile communication terminal into a signal form in the first mobile communication network, and sends the location management device of the first mobile communication network to the mobile communication terminal. Location registration executing means for performing location registration and obtaining user information of the mobile communication terminal from the first mobile communication network;
A communication control device comprising:   The communication control apparatus according to claim 1, further comprising routing information transmitting means for transmitting routing information to the second mobile communication network to the first mobile communication network. User information storage means for storing the user information acquired by the location registration execution means;
When there is a location information request for the mobile communication terminal from the second mobile communication network, the location information for transmitting the location information of the mobile communication terminal based on the user information stored in the user information storage means The communication control apparatus according to claim 1, further comprising a transmission unit. In the second mobile communication network is a roaming network of a mobile communication terminal adapted only to the mobile communication network of the first mobile communication network and the home network and the circuit switched network is a circuit switched network, the second mobile communication In a communication control method for performing communication control of the mobile communication terminal in a network ,
In the second mobile communication network, at least a core network is an IMS network,
A location registration receiving step for receiving a location registration request from the mobile communication terminal in the second mobile communication network;
The location registration request received from the mobile communication terminal in the location registration reception step is converted into a signal form in the first mobile communication network, and the location management device of the first mobile communication network A location registration execution step of performing location registration and obtaining user information of the mobile communication terminal from the first mobile communication network;
A communication control method characterized by comprising: A first mobile communication network is a circuit switched network, a mobile communication terminal adapted only to the mobile communication network of the first mobile communication network and the home network and the circuit switched network, roaming network of the mobile communication terminal In a communication control system having a second mobile communication network,
The first mobile communication network transmits user information to the second mobile communication network based on a request from the second mobile communication network and user information holding means for holding user information of the mobile communication terminal. User information transmission means for
In the second mobile communication network, at least a core network is an IMS network, and a location registration reception unit that receives a location registration request from the mobile communication terminal in the second mobile communication network, and the location registration reception unit includes: The location registration request received from the mobile communication terminal is converted into a signal carrying in the first mobile communication network, and the location registration of the mobile communication terminal is performed in the location management device of the first mobile communication network, And a location registration executing means for acquiring user information of the mobile communication terminal from the first mobile communication network.

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