JP5304873B2 - COMMUNICATION METHOD, COMMUNICATION SYSTEM USING THE SAME, AND COMMUNICATION DEVICE - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a line switching user agent system capable of realizing a service equivalent to a service provided by line switching, by an IMS/MMD. <P>SOLUTION: An extended communication device 1 executes a function required in a mobile terminal 3 (signal transmission/reception or the like) in an IMS/MMD in place of the mobile terminal 3, and converts a call control signal in line switching from the mobile terminal 3 into a signal handled in the IMS/MMD in order to absorb an operation difference between the line switching and the IMS/MMD. The extended communication device 1 uses an IMS/MMD signal to transparently transfer a line switching signal including additional service control, out of UNI signals from the mobile terminal 3, to an S-CSCF 5. A signal is transferred to an additional service AS 7 from the S-CSCF 5 by filter processing on the basis of a profile of a user. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a communication method, a communication system using the communication method, and a communication apparatus, and more particularly to provision of a service in a transition from a circuit switching network to a network using IP (Internet Protocol).

  Currently, there is a transition from a circuit switching network to a network using IP, and among them, mobile phone systems are also shifting from a circuit switching system to a system using IP.

  In this transition, a method of converting a circuit-switched signal to a signal handled by IMS / MMD in a home network (Home Network) of IMS (IP Multimedia Subsystem) / MMD (Multi-Media Domain) is employed.

  In a cellular phone system, as a major difference between control in a circuit switching network and control in IMS / MMD, a device for performing location registration and additional services is in a circuit switching network in which a mobile terminal is located in circuit switching. In IMS / MMD, it is performed by a SIP (Session Initiation Protocol) server and an application server in the home network (for example, see Non-Patent Document 1).

  Conventionally, the conversion between the circuit switching network and the IMS / MMD has a configuration as shown in FIG. 11, and the boundary devices [MGCF (Media Gateway Control Function) 32 and MGW (media Gateway Way) 37 at the entrance to the home IP network 600 are used. ] Is used to convert the circuit switching signal to the IMS / MMD signal.

  In this configuration, the location registration information management and additional service execution device of the mobile terminal 30 is performed by an MSC (Mobile Switching Center) 31, and the location information and additional service control information from the mobile terminal 30 are stored in the mobile terminal 30 and the network device ( It communicates with the MSC 31) via a UNI (User-Network Interface) 401.

“Mobile Radio Interface Layer 3 Supplementary Services Specification; General Aspects” [3GPP (3rd Generation Partnership Project) TS 24.010 V12.

  However, in the conventional mobile phone system described above, a signal via the NNI (Network-Network Interface) 501 between the networks (between the serving MSC 31 and the MGCF 32) in the relay circuit switching network 500 is communicated by the UNI 401. There is no ability to transmit information. For this reason, in the conversion from the circuit switching network 400 to the IMS / MMD, it is difficult to realize a service equivalent to the service provided by the conventional circuit switching system using the IMS / MMD.

  Therefore, an object of the present invention is to provide a communication method capable of solving the above-described problems and realizing a service equivalent to a service provided by circuit switching by IMS / MMD, and a communication system and a communication apparatus using the communication method. It is to provide.

The communication method according to the present invention comprises:
The mobile terminal transmits a Location Update Request signal to the communication device,
The communication device acquires user data from an HLR / HSS (Home Location Register / Home Subscriber Server), and sends a Location Update Accept to the mobile terminal.
If the communication device determines whether to register the mobile terminal in IMS (IP Multimedia Subsystem) based on a flag included in the user data and determines to register the mobile terminal in the IMS, S -Send a first Register signal to the CSCF (Serving-Call Server Control Function),
The S-CSCF receives the first Register signal, transmits a second Register signal to an additional service AS (Application Server),
The mobile terminal is registered in the IMS.

A communication system according to the present invention comprises:
Mobile terminal, communication device, HLR / HSS (Home Location Register / Home Subscriber Server), S-CSCF (Serving-Call Server Control Function), additional service AS (Application Service)
The mobile terminal transmits a Location Update Request signal to the communication device,
The communication device acquires user data from the HLR / HSS, and transmits a Location Update Accept to the mobile terminal,
If the communication device determines whether to register the mobile terminal in IMS (IP Multimedia Subsystem) based on a flag included in the user data, and determines that the mobile terminal is registered in the IMS, Send a first Register signal to the S-CSCF;
The S-CSCF receives the first Register signal and transmits a second Register signal to the supplementary service AS;
The mobile terminal is registered in the IMS.

A communication device according to the present invention comprises:
A communication device connected to a mobile terminal,
When the location update request signal is received from the mobile terminal, the user data is acquired from the HLR / HSS (Home Location Register / Home Subscriber Server),
Sending Location Update Accept to the mobile terminal,
If it is determined whether or not to register the mobile terminal in IMS (IP Multimedia Subsystem) based on a flag included in the user data, and if it is determined to register the mobile terminal in the IMS, S-CSCF (Serving -The mobile terminal is registered in the IMS by transmitting a Register signal toward the Call Server Control Function).

  That is, the circuit switching user agent system according to the present invention uses a location registration information / state of the mobile terminal in the circuit switching network to detect IMS (IP Multimedia Subsystem) / MMD in a device in the visited network to which the mobile terminal is connected. (Multi-Media Domain) is registered, and a UNI (User-Network Interface) signal from a mobile terminal is incorporated (embedded) in a signal handled by IMS / MMD, and embedded in a home network service processing device. By transferring to, it becomes possible to realize a service equivalent to a conventional circuit switching service by IMS / MMD.

  Here, the visited network is a network configured to be able to process a UNI signal in a circuit switching network and a signal handled by IMS / MMD. That is, a device in a visited network to which a mobile terminal is connected is a communication device that can process a UNI signal in a circuit switching network and a signal handled by IMS / MMD.

  In the circuit-switched user agent system of the present invention, when a circuit-switched signal in a cellular phone system is converted into a signal handled by IMS / MMD, registration processing by IMS / MMD is performed according to the location registration status in the circuit-switched network. The circuit switching signal is converted into a signal handled by IMS / MMD, and the UNI signal from the mobile terminal is transferred to the IMS / MMD side as necessary, and the signal required by the mobile terminal in IMS / MMD is transmitted to the mobile terminal. By generating instead, a service equivalent to the conventional circuit switching service can be provided by IMS / MMD.

  More specifically, in the circuit-switched user agent system of the present invention, an extended communication device that combines MSC (Mobile Switching Center) / VLR (Visitor Location Register) and CSUA (circuit-switched user agent) From the position information state in the circuit switching in the visited network, a signal handled by IMS / MMD is transmitted to an S-CSCF (Serving-Call Server Control Function), and registration processing in IMS / MMD is performed.

After registration processing in IMS / MMD, the extended communication apparatus converts a circuit switching signal into a signal in IMS / MMD for normal circuit switching call processing (outgoing / incoming). Further, when the extended communication apparatus receives a UNI signal including an additional service control signal from the mobile terminal, the extended service control signal uses the additional service control signal according to the signal type, and a SIP (Session Initiation Protocol) signal handled by IMS / MMD. That is, the supplementary service control signal is incorporated into a signal handled by IMS / MMD and transferred to the S-CSCF as it is.

  The SIP signal in which the UNI signal is incorporated is transferred to the additional service AS (application server) by the filtering process based on the user profile in the S-CSCF, and the additional service for the mobile terminal is executed by the additional service AS.

  Thus, in the circuit switching user agent system of the present invention, the additional service control signal in the circuit switching signal is added to the service execution apparatus existing in the home network using the SIP signal handled by the IMS / MMD. Since it is transferred to the service AS, a service equivalent to a service provided by circuit switching can be provided by IMS / MMD. Further, regarding the transferred signal, the additional service AS can be configured by diverting the assets of the existing circuit switching device.

  Therefore, in the circuit switching user agent system of the present invention, the additional service processing is performed in the IMS / MMD with the signal of the additional service in the conventional circuit switching, so that a service equivalent to the service provided in the circuit switching is realized. It becomes possible.

  In addition, in the circuit switching user agent system of the present invention, the additional service AS handles signals in the conventional circuit switching, so that the additional service processing part of the extended communication apparatus can be used in common, and resources can be used. It is possible to make efficient use and shift to a system using IP.

  By adopting the above-described configuration and operation, the present invention provides an effect that a service equivalent to a service provided by circuit switching can be realized by IMS / MMD.

It is a block diagram which shows the structure of the circuit switching user agent system by the 1st Embodiment of this invention. It is a block diagram which shows the structure of the extended communication apparatus of FIG. It is a block diagram which shows the structure of the additional service AS of FIG. It is a sequence chart which shows the registration procedure in the 1st Embodiment of this invention. It is a sequence chart which shows the outgoing / incoming call control service starting procedure in the 1st Embodiment of this invention. It is a sequence chart which shows the transmission control operation | movement in the 1st Embodiment of this invention. It is a block diagram which shows the structure of the circuit switching user agent system by the 2nd Embodiment of this invention. It is a block diagram which shows the structure of the circuit switching user agent system by the 3rd Embodiment of this invention. It is a sequence chart which shows the outgoing / incoming call control service starting procedure in the 3rd Embodiment of this invention. It is a sequence chart which shows the outgoing / incoming call control service starting procedure in the 4th Embodiment of this invention. It is a block diagram which shows the conventional network structure. It is a figure which shows an example of the approach using VCC of this invention. It is a figure which shows an example of the mutual operation | movement of eMSC-Server / MGCF of this invention. It is a figure which shows an example of the architecture of eMSC-Server of this invention. It is a figure which shows an example of the transfer to the architecture of eMSC-Server of this invention.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing the configuration of a circuit-switched user agent system according to the first embodiment of the present invention. In FIG. 1, a circuit-switched user agent system according to a first embodiment of the present invention includes a visited network 100 in which an extended communication device 1 and an MGW (Media Gateway) 2 are arranged, an I-CSCF (Interrogating-Call). Session Control Function (4), S-CSCF (Serving-Call Session Control Function) 5, HLR (Home Location Register) / HSS (Home Subscriber Server) 6 and Additional Service AS (Home Service Server) (Additional Service AS) A home network (200), an IP (Internet Protocol) network 300, and a mobile terminal 3 are included.

  Here, the visited network 100 processes a UNI (User-Network Interface) signal and a signal handled by an IMS (IP Multimedia Subsystem) / MMD (Multi-Media Domain) in the circuit switching network, respectively. It is a network that can be configured. That is, the extended communication apparatus 1 in the visited network 100 to which the mobile terminal 3 is connected is a communication apparatus that can process a UNI signal in a circuit switching network and a signal handled by IMS / MMD.

  The extended communication device 1 is a device that combines a conventional mobile switching center (MSC) / VLR (visitor location register) 11 and a CSUA (circuit switching user agent) 12 according to the location registration of the mobile terminal 3 in circuit switching. Then, registration processing by IMS / MMD is performed on the S-CSCF 5.

  The extended communication device 1 performs functions (transmission / reception of signals, etc.) required for the mobile terminal 3 on behalf of the mobile terminal 3 in the IMS / MMD, and absorbs an operation difference between circuit switching and IMS / MMD. Then, the call control signal in the circuit switching from the mobile terminal 3 is converted into a signal handled by IMS / MMD.

  Further, the extended communication apparatus 1 incorporates (embeds) the circuit switching signal including the additional service control in the UNI signal from the mobile terminal 3 into the IMS / MMD signal and transfers it to the S-CSCF 5. From the S-CSCF 5 to the supplementary service AS7, an IMS / MMD signal in which a circuit switching signal including supplementary service control is incorporated by filtering based on the user profile is transferred.

  Here, as a method of incorporating the circuit switching signal including the additional service control of the UNI signal into the IMS / MMD signal, for example, a method using a message body of the SIP message can be considered. The message body of the SIP message is information defined other than SIP, and is optional in the configuration of the SIP message. As a method for adding a message body to a SIP message, for example, MIME (Multipurpose Internet Mail Extensions) used when an attached file or the like is added to a message and sent in an e-mail is used.

  Further, the extended communication apparatus 1 defines a new flag in the user profile from the HLR / HSS 6 as to whether or not the conversion process to the IMS / MMD for the mobile terminal 3 is started, and whether or not the flag exists. Determine by.

  The MGW 2 is a media conversion system that converts a media signal AMR (Adaptive Multi Rate) on a circuit-switched network ATM (Asynchronous Transfer Mode) / STM (Synchronous Transfer Mode) into an IP media signal AMR.

  That is, the MGW 2 is an MGW having both functions of the MGW 38 in the visited circuit switching network 400 and the MGW 37 in the home IP network 500 shown in FIG. In this way, by providing the MGW 2 with the functions of the conventional MGW 38 and MGW 37, it becomes possible to directly convert user media data in circuit switching into media data handled by IMS / MMD. Therefore, the media data that has conventionally been obtained through the MGW 38 in the visited circuit switching network 400 and the MGW 37 in the home IP network 500 can be directly received from the MGW 2, so that the route can be optimized.

  The supplementary service AS7 is a device that analyzes a UNI signal from the mobile terminal 3 transferred by a signal handled by IMS / MMD by the extended communication apparatus 1 and performs a supplementary service according to the analysis result. Further, the supplementary service AS7 generates a UNI signal in response to the mobile terminal 3 such as completion of service execution and a UNI signal to be notified to the mobile terminal 3, and sends the S signal to the extended communication apparatus 1 using a signal handled by the IMS / MMD. -It has a function to transmit via CSCF5.

  FIG. 2 is a block diagram showing a configuration of the extended communication device 1 of FIG. In FIG. 2, the extended communication device 1 includes a MAP (Mobile Application Part) / CAP [CAMEL (Customized Application for Mobile Network Enhanced Logic) Application Signal (114) and an ISUP [ISN Processing unit 113, MSC control unit 112, GSM (Global System for Mobile communications) Layer 3 signal processing unit 111, a conventional MSC / VLR unit 11, SIP User Agent unit 121, SIP signal processing unit 122 (User A Has a configuration obtained by combining the ent) unit 12.

  The MSC control unit 112 includes a call state management CC (Call Control) processing unit 1121, a location registration management MM (Mobility Management) processing unit 1122, and an additional service management SS (Supplementary Service) processing unit 1123.

  The MEGACO (Megaco / H.248) signal processing unit 13 is configured as a function common to the MSC / VLR unit 11 and the circuit switching UA unit 12. With this configuration, the MSC control unit 112 in the MSC / VLR unit 11 and the SIP User Agent unit 121 in the circuit switching UA unit 12 are internally linked to perform registration / call control / in both circuit switching and IMS / MMD. Additional service processing (MM / CC / SS) is performed.

  FIG. 3 is a block diagram showing a configuration of the additional service AS7 of FIG. In FIG. 3, the additional service AS7 includes a SIP User Agent 71 for performing additional service management in IMS / MMD, an additional service management SS processing unit 72 for processing and analyzing a transparently transferred signal, a Diameter signal processing unit 74, and a SIP signal. And a processing unit 73. With this configuration, the additional service AS 7 can conventionally use the additional service management SS processing unit 1123 in the MSC as the additional service management SS processing unit 72.

  FIG. 4 is a sequence chart showing a registration procedure in the first embodiment of the present invention, and FIG. 5 is a sequence chart showing an outgoing / incoming call restriction service activation procedure in the first embodiment of the present invention. These are the sequence charts which show transmission control operation | movement in the 1st Embodiment of this invention. The operation of the circuit-switched user agent system according to the first embodiment of the present invention will be described with reference to FIGS.

  The registration procedure in the first embodiment of the present invention will be described with reference to FIG.

  In the MSC / VLR unit 11, the extended communication device 1 is triggered by the Location Update Request signal (a1 in FIG. 4) from the mobile terminal 3, and the Update Location signal (a2 in FIG. 4), the Insert Subscriber Data signal (in FIG. 4). a3), User Subscriber Data Ack signal (a4 in FIG. 4), Update Location Ack signal (a5 in FIG. 4) is transmitted / received (conventional processing) to acquire the user profile from HLR / HSS6, and VLR (Visitor Location Register) And a Location Update Accept signal (a6 in FIG. 4) is transmitted to the mobile terminal 3.

  Thereafter, the extended communication device 1 confirms the user profile downloaded from the HLR 6 (a7 in FIG. 4), and determines whether to start the conversion process to IMS / MMD. When the extended communication device 1 determines that the conversion processing to IMS / MMD is started, the element of the Location Update Request signal (a1 in FIG. 4) from the mobile terminal 3 and the Insert Subscriber Data Ack signal (a4 in FIG. 4) from the HLR 6 ), A SIP Register signal (a8 in FIG. 4) is generated and transmitted to the S-CSCF 5 to perform registration processing of the mobile terminal 3 in IMS / MMD.

  The S-CSCF 5 obtains a user profile from the HSS 6 by transmitting and receiving a Diameter SAR (Server Assignment Request) / SAA (Server Assignment Answer) signal (a9, a10 in FIG. 4), and sends the user profile to the additional service AS7. Registration processing is performed (a12 to a14 in FIG. 4).

  When the supplementary service AS7 receives the SIP Register signal (a12 in FIG. 4) from the S-CSCF5, the user profile of the mobile terminal 3 is converted into a Diameter UDR (User Data Request) / UDA (User Data Answer) signal (see FIG. 4). 4 is obtained from the HSS 6 by transmission / reception of a13). When the additional service AS 7 performs registration processing according to the profile of the mobile terminal 3, the additional service AS 7 can receive the notification of the additional service, so that the SIP SUBSCRIBE signal (see FIG. 4) is sent to the extended communication device 1 via the S-CSCF 5. A15, a16).

  Further, when the determination in the a7 process is not the activation of the conversion process to IMS / MMD, and when the registration process to IMS / MMD (a8 to a14 in FIG. 4) fails, the extended communication device 1 The operation as a conventional MSC is performed and the conventional circuit switching service is continued.

  Next, with reference to FIG. 5, a description will be given of a procedure for starting an outgoing / incoming call restriction service, which is a typical circuit switching service, in the first embodiment of the present invention.

  By the user's terminal operation, the mobile terminal 3 transmits a Register signal (b1 in FIG. 5) indicating activation of the outgoing / incoming call restriction service in CS (Circuit Switch) to the extended communication device 1. Upon receiving the Register signal in CS, the extended communication device 1 analyzes that it is an additional service according to the signal type, and when the mobile terminal 3 has completed the registration process in IMS / MMD, the additional service AS7 On the other hand, the Register signal at the CS is incorporated (embedded) in the SIP Notify signal (b2 in FIG. 5) and transmitted to the S-CSCF 5.

  When the S-CSCF 5 receives the SIP Notify signal (b2 in FIG. 5) in which the Register signal in the CS is incorporated, the SIP Notify signal (b3 in FIG. 5) in which the Register signal in the CS is incorporated in the supplementary service AS7. Forward.

  When the supplementary service AS7 receives the SIP Notify signal (b3 in FIG. 5) in which the Register signal at the CS is incorporated, it analyzes the Register signal at the CS, activates the outgoing / incoming call restriction service, and sends a Diameter PUR (Profile Update) to the HSS6. The service activation, that is, the change of the service state is notified by the profile update procedure using the (Request) signal (b4 in FIG. 5).

  When the processing in the HSS 6 is completed and the completion is notified by a Diameter PUA (Profile Update Answer) signal (b5 in FIG. 5), the additional service AS7 adds to the extended communication device 1 via the S-CSCF5. A SIP 200 OK signal (b6 and b7 in FIG. 5) incorporating a CS signal indicating completion of service activation is transmitted.

  When the extended communication device 1 receives the SIP 200 OK signal (b7 in FIG. 5) incorporating the CS signal indicating completion of the activation of the additional service, the extended communication device 1 sends the CS signal (Release Complete) (b8 in FIG. 5) in the SIP signal. Transmit to the mobile terminal 3. In this embodiment, the additional service is activated by this procedure.

  Furthermore, with reference to FIG. 6, the outgoing call restriction process in the first embodiment of the present invention will be described.

  When the extended communication apparatus 1 receives the SETUP signal (c1 in FIG. 6) that is a transmission signal from the mobile terminal A to the mobile terminal B, the SETUP signal of the CS signal is displayed when the registration process in the IMS / MMD is completed. The signal (c1 in FIG. 6) is converted into the SIP INVITE signal (c2 in FIG. 6) of the IMS / MMD signal and transmitted to the S-CSCF 5.

  Upon receiving the SIP INVITE signal (c2 in FIG. 6), the S-CSCF 5 transfers the SIP INVITE signal (c3 in FIG. 6) to the supplementary service AS7.

  Upon receiving the SIP INVITE signal (c3 in FIG. 6), the supplementary service AS7 acquires the user profile of the mobile terminal A from the HSS 6 by transmitting and receiving a Diameter UDR / UDA signal (c4 in FIG. 6) as necessary. The supplementary service AS7 determines the call restriction according to the profile of the mobile terminal A, and transmits a SIP 403 Forbidden signal (c5 in FIG. 6) incorporating the CS signal indicating the call restriction to the S-CSCF5.

  The S-CSCF 5 determines from the profile of the mobile terminal A that it is connected to the circuit switching network 100 that is in the area, and a SIP 403 Forbidden signal (c6 in FIG. ) To the extended communication device 1. When the extended communication apparatus 1 receives the SIP signal including the CS signal (c6 in FIG. 6), the extended communication apparatus 1 transmits the CS signal (DISCONNECT) (c7 in FIG. 6) included in the SIP signal to the mobile terminal A. In the present embodiment, outgoing calls are restricted by this procedure.

  As described above, in the present embodiment, since additional service processing is performed in IMS / MMD by using a signal for additional service in conventional circuit switching, a service equivalent to the service provided in circuit switching can be realized. it can.

  In the present embodiment, the additional service AS 7 handles signals in conventional circuit switching, so that the additional service processing part of the extended communication device 1 can be used in common, and resources can be efficiently used. By utilizing this, it is possible to realize a transition to a system using IP.

  FIG. 7 is a block diagram showing the configuration of a circuit-switched user agent system according to the second embodiment of the present invention. In FIG. 7, in the circuit switching user agent system according to the second embodiment of the present invention, the extended communication apparatus 1 performs functions / operations required in IMS / MMD instead of the mobile terminal 3, so that the visited network The first embodiment of the present invention described above, except that a network configuration in which a P-CSCF (Proxy-Call Session Control Function) 8 is arranged between the 100 extended communication apparatuses 1 and the I-CSCF 4 of the home network 200 is adopted. The configuration is the same as that of the circuit switching user agent system according to the embodiment, and the same components are denoted by the same reference numerals.

  The circuit switched user agent system according to the second embodiment of the present invention operates in the same manner as the circuit switched user agent system according to the first embodiment of the present invention except that the P-CSCF 8 is arranged. To achieve the same effect. That is, the second embodiment of the present invention shows that it can be applied to a system using the P-CSCF 8. The extended communication apparatus 1 can also have the function of the P-CSCF 8.

  FIG. 8 is a block diagram showing the configuration of a circuit-switched user agent system according to the third embodiment of the present invention. In FIG. 8, the circuit switching user agent system according to the third embodiment of the present invention is the same as that shown in FIG. 8 except that the additional service AS7 in the home network 200 is directly connected to the extended communication device 1 in the visited network 100. The circuit configuration is the same as that of the circuit switching user agent system according to the first embodiment of the present invention shown in FIG. 1, and the same components are denoted by the same reference numerals. Further, the circuit-switched user agent system according to the third embodiment of the present invention is similar to the above-described processing except that the circuit-switched user agent system according to the first embodiment of the present invention differs from the outgoing / incoming call restriction service activation procedure. I do.

  In the present embodiment, in this outgoing / incoming call restriction service activation procedure, the extended communication device 1 directly communicates with the additional service AS7, so the protocol to be used is also HTTP (Hyper Text Transfer Protocol).

  FIG. 9 is a sequence chart showing an outgoing / incoming call restriction service activation procedure in the third embodiment of the present invention. With reference to this FIG. 9, the starting procedure of the outgoing / incoming call restriction service which is a typical circuit switching service in the third embodiment of the present invention will be described.

  By the user's terminal operation, the mobile terminal 3 transmits a Register signal (d1 in FIG. 9) indicating activation of the outgoing / incoming call restriction service in the CS to the extended communication device 1. Upon receiving the Register signal in CS, the extended communication device 1 analyzes that it is an additional service according to the signal type, and when the mobile terminal 3 has completed the registration process in IMS / MMD, the additional service AS7 On the other hand, the Register signal in the CS is incorporated (embedded) in the HTTP PUT signal (d2 in FIG. 9) and transmitted.

  When the supplementary service AS7 receives the HTTP PUT signal (d2 in FIG. 9) incorporating the Register signal in the CS, the supplementary service AS7 analyzes the Register signal in the CS, activates the outgoing / incoming call restriction service, and sends the Diameter PUR signal (see FIG. 9) to the HSS6. 9 d3), the service activation, that is, the change of the service state is notified by the profile update procedure.

  When the processing in the HSS 6 is completed and the completion is notified by the Diameter PUA signal (d4 in FIG. 9), the supplementary service AS7 incorporates a CS signal indicating completion of activation of the supplementary service into the extended communication device 1. An HTTP 200 OK signal (d5 in FIG. 9) is transmitted.

  When the extended communication device 1 receives the HTTP 200 OK signal (d5 in FIG. 9) incorporating the CS signal indicating the completion of activation of the additional service, the extended communication device 1 sends the CS signal (Release Complete) (d6 in FIG. 9) in the HTTP signal. Transmit to the mobile terminal 3. In this embodiment, the additional service is activated by this procedure.

  As described above, in this embodiment, it is possible to incorporate a CS signal by MIME as in the case of SIP in the first embodiment of the present invention. Therefore, also in this embodiment, the same effect as the first embodiment of the present invention can be obtained.

  The circuit-switched user agent system according to the fourth embodiment of the present invention uses the additional service AS7 in the home network 200 as the extended communication apparatus in the visited network 100, as in the third embodiment of the present invention. 1 is connected directly. In the present embodiment, since the extended communication device 1 directly communicates with the additional service AS7 in the procedure for starting and stopping the outgoing / incoming call restriction service, the protocol to be used is XCAP (An Extended Markup Language (XML) Configuration Access Protocol) and It has become.

  FIG. 10 is a sequence chart showing an outgoing / incoming call restriction service activation procedure in the fourth embodiment of the present invention. With reference to this FIG. 10, the starting procedure of the outgoing / incoming call restriction service which is a typical circuit switching service in the 4th Embodiment of this invention is demonstrated.

  By the user's terminal operation, the mobile terminal 3 transmits a Register signal (e1 in FIG. 10) indicating activation of the outgoing / incoming call restriction service in the CS to the extended communication device 1. Upon receiving the Register signal in CS, the extended communication device 1 translates the SS signal (e2 in FIG. 10), and when the corresponding mobile terminal 3 has completed the registration process in IMS / MMD, the additional service The Register signal at CS is incorporated into (embedded with) the HTTP PUT signal (e3 in FIG. 10) and transmitted to AS7. Here, the SS signal refers to a signal for additional service included in the CS signal, for example.

  When the supplementary service AS7 receives the HTTP PUT signal (e3 in FIG. 10) incorporating the Register signal in the CS, the supplementary service AS7 analyzes the Register signal in the CS, activates the outgoing / incoming call restriction service, and sends the Diameter PUR signal (see FIG. 10 e4), the service activation, that is, the change of the service state is notified by the profile update procedure.

  When the processing in the HSS 6 is completed and the completion is notified by a Diameter PUA (Profile Update Answer) signal (e5 in FIG. 10), the additional service AS7 indicates the completion of the activation of the additional service to the extended communication device 1. An HTTP 200 OK signal (e6 in FIG. 10) incorporating the CS signal is transmitted.

  When the extended communication device 1 receives the HTTP 200 OK signal (e6 in FIG. 10) incorporating the CS signal indicating the completion of the activation of the additional service, the extended communication device 1 sends the CS signal (Release Complete) (e7 in FIG. 10) in the HTTP signal. Transmit to the mobile terminal 3. In this embodiment, the additional service is activated by this procedure.

  As described above, in this embodiment, it is possible to incorporate a CS signal by MIME as in the case of SIP in the first embodiment of the present invention. Therefore, also in this embodiment, the same effect as the first embodiment of the present invention can be obtained.

  The present invention is a proposal to define an MSC-Server interaction by becoming an MSC (Mobile service Switching Center) -Server (eMSC-Server) with an MGCF (Media Gateway Control Function) function. The eMSC-Server translates and transmits a call signal from the circuit switching network into a VoIP (Voice over Internet Protocol) call signal to the central processing network, and also performs the reverse operation. Then, the eMSC-Server sends a call signal to TAS (Telephony Application Server) in IMS. This sufficiently ensures compatibility with existing UEs and migration to the All-IP network.

  The current Release 7 VCC (Voice Call Continuity) has a VMSC (Visited Mobile Switch Center) as a call to a VCC AS (Application Service for a CAMEL), a CAMEL (Customized Application for Hw as a trigger. The concept of sending is used. A similar concept is used for supplementary services in the aggregation of processing into IMS (see FIG. 12). The VMSC CAMEL is used for both MO (Mobile Origination) call signals and MT (Mobile Termination) call signals. A gsm SCF (GSM Service Control Function) requests an IMRN (IP Multimedia Routing Number) from the TAS of the home network, and the VMSC transmits a call signal to the TAS according to the IMRN. In subsequent supplementary services, calls are controlled based on TAS.

  The request for additional service from the UE is directly transmitted to the TAS via an interface such as Ut and v3. While the above solution has the advantage of not affecting the central control network, it has an effect on the terminal and cannot be serviced by an already existing terminal.

  Another solution for realizing additional services in centralized processing in IMS is to extend MSC-Server (eMSC-Server) by using the function of MGCF for ISUP / SIP (Session Initiation Protocol) interconnection. And control all call signals in the IMS. The eMSC-Server is involved in outgoing / incoming signals in the corresponding CS access network. The CS transmission signal of the terminal is translated into a VoIP call by eMSC-Server, and the supplementary service control signal is processed by IMS. The incoming call signal is guided to the MGW / eMSC-Server for transmission to the CS access network. Even in that case, the incoming signal is controlled by the IMS system. When the mobile terminal is only in the PS (Packet Switch) range, eMSC-Server is not involved.

  FIG. 13 shows an example of roaming method. When the terminal transmits a call signal, the CS signal from the terminal is converted into a SIP signal by VeMSC-Server (Visit eMSC-Server) and transmitted to the P-CSCF (Proxy CSCF) of the visited network (P -The CSCF can also be operated by being included in the VeMSC). The SIP signal is sent to the TAS by setting iFCs (inter Filter Criteria) in the S-CSCF. The call signal is controlled based on TAS. Thereafter, TAS is responsible for supplementary service control. In the existing method, the supplementary service request is transmitted from the terminal to the MSC via the A / Iu interface. The VeMSC-Server incorporates the supplementary service request into the SIP signal or translates it and sends it to the TAS. The TAS receives the additional service request and executes it in response to the request. The advantage of this solution is that existing terminals are supported and CAMEL is not required compared to solutions like VCC. Therefore, when shifting to All-IP, there is only a small effect on the MSC-Server and no influence on the existing terminals.

  In addition, since the location of the user in the IP network is in the MGW of the visited network, voice communication to the other party in any IMS system is directly transmitted without traversing the home network. This network configuration has many advantages for both home network operators and visited network operators in terms of reducing network resources when the IMS call control method becomes more popular. Is expected. On the other hand, in the case of the VCC solution, the communication paths of the visited network and the home network are always required for all voice communications.

  An example of the detailed architecture of eMSC-Server is shown in FIG. The eMSC-Server includes an MGCF function with a normal MSC-Server, VLR, and User Agent (hereinafter referred to as UA). As a minimum impact on VLR and HLR, additional indications are required in the MAP protocol. The HLR needs to indicate that the terminal is handled by the centralized control processing in the IMS by the home network, and the VLR needs to interpret a flag indicating it. The MGW is required to be able to become the incoming side of the CS connection, similar to the incoming side in IMS. The Mc and Mn interfaces can be combined into one new interface.

  FIG. 15 shows an example of migration from an existing CS network to AIPN (All IP Network) that supports eMSC-Server. The operator can realize a smooth transition from the CS network to the IMS (IP network) by adjusting a customer profile that allows centralized processing in the IMS according to the capacity of the IMS system.

1 Extended communication device 2 MGW
3 Mobile terminal 4 I-CSCF
5 S-CSCF
6 HLR / HSS
7 Additional service AS
8 P-CSCF
11 MSC / VLR unit 12 Circuit switching UA unit 13 MEGACO signal processing unit 71 SIP User Agent
72 Additional service management SS processing unit 73 SIP signal processing unit 74 Diameter signal processing unit 100 Visited network 111 GSM Layer 3 signal processing unit 112 MSC control unit 113 ISUP signal processing unit 114 MAP / CAP signal processing unit 121 SIP User Agent unit 122 SIP signal processing unit 200 Home network 300 IP network 1121 Call state management CC processing unit 1122 Location registration management MM processing unit 1123 Additional service management SS processing unit

Claims (14)

The mobile terminal transmits a Location Update Request signal to the communication device,
The communication device acquires user data from an HLR / HSS (Home Location Register / Home Subscriber Server), and sends a Location Update Accept to the mobile terminal.
If the communication device determines whether to register the mobile terminal in IMS (IP Multimedia Subsystem) based on a flag included in the user data and determines to register the mobile terminal in the IMS, S -Send a first Register signal to the CSCF (Serving-Call Server Control Function),
The S-CSCF receives the first Register signal, transmits a second Register signal to an additional service AS (Application Server),
A communication method comprising registering the mobile terminal with the IMS. The communication method according to claim 1,
Whether to register the mobile terminal in the IMS is determined by whether or not a flag exists in the user data. Performing the communication method according to claim 1 or claim 2,
A communication method, wherein the communication device mutually converts a UNI (User-Network Interface) signal handled in a circuit switching network from the mobile terminal and a SIP (Session Initiation Protocol) signal handled in the IMS network. A communication method for mutual conversion according to claim 3 is performed.
The communication device transfers the SIP signal to the additional service AS;
A communication method for providing a service from the additional service AS to the mobile terminal. The communication method according to any one of claims 1 to 4,
The communication method is characterized in that the communication device is a Mobile Switching Center. Mobile terminal, communication device, HLR / HSS (Home Location Register / Home Subscriber Server), S-CSCF (Serving-Call Server Control Function), additional service AS (Application Service)
The mobile terminal transmits a Location Update Request signal to the communication device,
The communication device acquires user data from the HLR / HSS, and transmits a Location Update Accept to the mobile terminal,
If the communication device determines whether to register the mobile terminal in IMS (IP Multimedia Subsystem) based on a flag included in the user data, and determines that the mobile terminal is registered in the IMS, Send a first Register signal to the S-CSCF;
The S-CSCF receives the first Register signal and transmits a second Register signal to the supplementary service AS;
A communication system, wherein the mobile terminal is registered with the IMS. The communication system according to claim 6,
A communication system, wherein the determination as to whether or not to register the mobile terminal with the IMS is made based on whether or not a flag exists in the user data. The communication system according to claim 6 or 7,
If the mobile terminal is registered with the IMS,
A communication system, wherein the communication device mutually converts a UNI (User-Network Interface) signal handled by a circuit switching network from the mobile terminal and a SIP (Session Initiation Protocol) signal handled by the IMS network. A communication system according to any one of claims 6 to 8,
A communication system, wherein the communication device is a Mobile Switching Center. The communication system according to any one of claims 6 to 9,
When the supplementary service AS receives the SIP signal, a communication system, characterized by providing a service to the mobile terminal. A communication device connected to a mobile terminal,
When the location update request signal is received from the mobile terminal, the user data is acquired from the HLR / HSS (Home Location Register / Home Subscriber Server),
Sending Location Update Accept to the mobile terminal,
If it is determined whether to register the mobile terminal in IMS (IP Multimedia Subsystem) based on a flag included in the user data, and if it is determined to register the mobile terminal in the IMS, the S-CSCF (Serving A communication apparatus that registers the mobile terminal in the IMS by transmitting a Register signal toward a Call Server Control Function). The communication device according to claim 11,
The communication apparatus, wherein the determination as to whether or not to register the mobile terminal with the IMS is made based on whether or not a flag exists in the user data. The communication device according to claim 11 or 12,
After the mobile terminal is registered in the IMS, a UNI (User-Network Interface) signal handled by the circuit-switched network from the mobile terminal and a SIP (Session Initiation Protocol) signal handled by the IMS network are mutually converted. A communication device. The communication device according to any one of claims 11 to 13,
The communication apparatus is a mobile switching center.

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