WO2006094433A1 - Sous-systeme multimedia ip pour integration d'acces fixe et procede associe - Google Patents

Sous-systeme multimedia ip pour integration d'acces fixe et procede associe Download PDF

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Publication number
WO2006094433A1
WO2006094433A1 PCT/CN2005/000284 CN2005000284W WO2006094433A1 WO 2006094433 A1 WO2006094433 A1 WO 2006094433A1 CN 2005000284 W CN2005000284 W CN 2005000284W WO 2006094433 A1 WO2006094433 A1 WO 2006094433A1
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Prior art keywords
call session
fixed
user
session controller
cscf
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PCT/CN2005/000284
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English (en)
French (fr)
Inventor
Pei Lin Yang
Jun Hong
Xiao Kun Xu
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2005/000284 priority Critical patent/WO2006094433A1/zh
Publication of WO2006094433A1 publication Critical patent/WO2006094433A1/zh
Anticipated expiration legal-status Critical
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854Wide area networks, e.g. public data networks
    • H04L12/2856Access arrangements, e.g. Internet access

Definitions

  • IP name media subsystem integrating fixed access and implementation method thereof
  • the present invention relates to an IP multimedia system that integrates a fixed terminal access method and an implementation method thereof under the IP Multimedia Subsystem (IMS) architecture.
  • IMS IP Multimedia Subsystem
  • the switching systems in the current telecommunications field are basically concentrated on fixed network switching systems and mobile network switching systems. They appear as a stand-alone system in the operating environment, either supporting only fixed switching networks or only mobile switching.
  • the internet At present, many operators at home and abroad are full-service operators. They operate both mobile and fixed services. For them, they not only need to spend money to build fixed networks and mobile networks, but also networks that use fixed networks and mobile networks. Manage maintenance costs. Therefore, a core network system that supports both fixed access mode and mobile access mode is proposed, which not only reduces the investment and construction cost of the operator, but also reduces the network management and maintenance cost of the network.
  • IMS is a subsystem proposed by 3GPP to superimpose IP multimedia services on the GPRS network. As shown in Figure 1, its core feature is the use of the SIP protocol as a call control protocol and the independence of the access network. Although IMS realizes the independence of access network, IMS only supports 2G and 3G mobile access methods, and cannot support fixed access methods. Under the development trend of network convergence, some working organizations and operators at home and abroad And equipment vendors are actively researching IMS-based network convergence solutions to provide fixed access methods.
  • the object of the present invention is to provide an IP multimedia subsystem with integrated fixed access and an implementation method thereof, which are based on the IMS architecture and support fixed terminal access; the access modes of the fixed terminal mainly include xDSL, HFC, LAN, and wire connection.
  • the fixed terminal users are connected to the IP network, thereby accessing the IP multimedia subsystem, and implementing the IMS-based architecture to support the integration of the fixed network and the mobile network.
  • the technical solution of the present invention is: an IP multimedia subsystem that integrates fixed access, the system includes at least one call session controller; the call session controller is connected to a home subscriber server, and an egress gateway controller, A media gateway control confirmation
  • the call session controller is connected to the public telephone network through the egress gateway controller and the media gateway controller; the call session controller is further connected to the radio access network through a proxy call session controller;
  • the system further includes a fixed access proxy call session controller, connecting the call session controller and the fixed access network, and providing a proxy call session control function for a fixed access fixed user.
  • the fixed access proxy call session controller further includes:
  • a message receiving processing module comprising a message receiving preprocessing module and a user registration processing module and a user call processing module;
  • a message sending processing module receiving the message from the user or the call session controller and processing the message to the call session controller or the user through the message sending processing module.
  • the message receiving pre-processing module discriminates the received message, and if it is a registration message of a non-USIM/SIM card user, the non-USIM/SIM card registration user pre-processing module obtains the non-USIM
  • the information about the user of the SIM card is adjusted to the message of the USIM/SIM card user and sent to the user registration module for verification of the user identity; if the message receiving preprocessing module identifies the received message as USIM
  • the registration message of the SIM card user directly sends a message to the user registration processing module, and the user registration processing module performs verification of the user identity; if it is a non-registered message, the user directly calls the processing module to the message.
  • the message conversion, billing CDR, resource allocation and the like related to the call agent are processed and sent to the message sending processing module.
  • the system wherein the fixed access mode comprises xDSL, HFC, LAN, PLC or FTTx.
  • a method for implementing an IP multimedia subsystem that integrates fixed access includes:
  • a fixed-access proxy call session controller is added to provide fixed terminal user access in the IP multimedia subsystem, and the IP multimedia subsystem is provided for the fixed user. Multimedia service.
  • the method further includes: the fixed access proxy call session controller correlates the registration request initiated by the fixed user and forwards the request to the user's home query call session controller for processing the message initiated by the fixed user and Forwarding it to the call session controller; forwarding the request and response sent from the call session controller to a fixed user.
  • the method further includes: an interface associated with the fixed-access proxy call session controller including an interface with the interrogating call session controller, the serving call session controller, and the fixed user, the interrogating call session controller
  • the interface between the two is used to send the fixed user-initiated registration signaling to the interrogating call session controller after processing for the fixed user characteristic, and forward the response sent by the interrogating call session controller to the fixed user, and simultaneously Partial fixed user initiated session signaling forwards to the interrogating call session controller, and forwards the session signaling sent by the interrogating call session controller to the fixed user
  • the interface with the serving call session controller is The session signaling sent by the fixed user is forwarded to the serving call session controller, and the session signaling sent by the serving call session controller is forwarded to the fixed user.
  • the IP multimedia subsystem of the fusion fixed access and the implementation method thereof provide a new fixed access proxy call session controller for the fixed access mode, which not only realizes the access of the fixed terminal Moreover, the difference between mobile and fixed access is abandoned at the I-CSCF and the S-CSCF, and the real convergence of the IMS architecture and the mobile network is realized. Therefore, the fusion system of the present invention not only facilitates the use of the user. And improve the market competitiveness of telecom operators.
  • 1 is a basic architecture of a 3GPP IMS core control layer of the prior art
  • FIG. 2 is a schematic diagram showing the functional structure of the fixed-access proxy call session controller FP-CSCF according to the present invention
  • FIG. 3 is an IMS architecture supporting the fixed access IP multimedia subsystem and its implementation method for supporting fixed access according to the present invention
  • FIG. 4 is a schematic diagram showing an example of a system and method according to the present invention for supporting a fixed xDSL access method based on a 3GPP architecture;
  • FIG. 5 is a schematic diagram showing an example of a system and method according to the present invention that supports a fixed HFC access mode based on a 3GPP architecture. detailed description
  • the core multimedia invention of the fusion fixed access and the implementation method thereof are directed to a core network element entity of the IMS architecture, and a new logical network element entity is provided.
  • the controller FP-CSCF (Fixed Proxy Call Session Control Function, hereinafter referred to as FP-CSCF) provides proxy call session control for fixed users such as xDSL/HFC/LAN/PLC/FTTx.
  • the system of the present invention supports the architecture of the mobile terminal and the fixed network in the fixed terminal access mode.
  • the call session controller CSCF Call Session Control Function, CSCF
  • the media gateway controller MGCF are mainly used in the current IMS architecture.
  • Media Gateway Control Function hereinafter referred to as: MGCF:
  • Export Gateway Controller BGCF Bitout Gateway Control Function, hereinafter referred to as BGCF
  • BGCF Export Gateway Controller
  • HSS Home Subscriber Server
  • SLF Subscription Locator Function
  • the control controller FP-CSCF, the fixed access network, and the fixed terminal are composed. As shown in FIG. 3, the mobile user and the fixed terminal user can communicate through the IMS architecture.
  • the P-CSCKProxy Call Session Control Function is the first network element node that the IMS subsystem contacts the mobile user. It is mainly responsible for forwarding the message request and response initiated by the mobile user to the user.
  • Call Session Controller CSCF (Call Session Control Function) forwards the message request and response sent from the CSCF to the mobile user, maintains the Security Association SA between the mobile user and the P-CSCF, and provides the mobile SIP message compression and decompression between the user and P-CSCF and related billing functions.
  • Call Session Controller CSCF Call Session Controller CSCF (Call Session Control Function) forwards the message request and response sent from the CSCF to the mobile user, maintains the Security Association SA between the mobile user and the P-CSCF, and provides the mobile SIP message compression and decompression between the user and P-CSCF and related billing functions.
  • fixed users and mobile users have certain differences in user characteristics, access methods, charging methods, and security methods. In terms of user characteristics, mobile users have SIM
  • the call agent session controller connected to the fixed access will have different processing methods for the call agent session controller connected to the mobile user; Mobile wireless bandwidth is very valuable, so signaling needs to be compressed and decompressed, but for fixed users, the bandwidth is still quite sufficient; from the charging method, there are big differences between mobile users and fixed users, such as mobile users. Both outgoing and outgoing calls require billing, while fixed-user users only have outgoing billing, while incoming calls are not billed. From a security perspective, mobile access and fixed access also differ. Therefore, the present invention proposes a new fixed access proxy call session controller FP-CSCF which is distinguished from the original proxy call session controller P-CSCF of the access mobile terminal, and provides a proxy mode for the fixed user to access.
  • FP-CSCF which is distinguished from the original proxy call session controller P-CSCF of the access mobile terminal, and provides a proxy mode for the fixed user to access.
  • the fixed access proxy call session controller FP-CSCF of the present invention has a functional structure as shown in FIG. 2.
  • the message from the user UE or the CSCF is sent to a message receiving processing module.
  • the message receiving processing module includes a message receiving preprocessing module, and a user registration processing module and a user call processing module.
  • the message processed by the message receiving processing module is sent to the user or the CSCF through a message sending processing module.
  • the message from the user or the CSCF first enters the message receiving pre-processing module of the FP-CSCF, and the message receiving pre-processing module discriminates the received message, if it is a non-USIM/SIM card user
  • the non-USIM/SIM card registration user pre-processing module obtains the information of the non-USIM/SIM card user, adjusts the registration message to the message of the USIM/SIM card user, and sends the message to the user registration module for user identity.
  • Identifying and registering if the message receiving pre-processing module identifies that the received message is a USIM/SIM card registered user, sending a message directly to the user registration processing module, and performing user identity by the user registration processing module Verification; if it is a non-registered message, the call processing module directly converts the message related to the call agent by the user call processing module, The billing bill, the resource allocation, and the like are sent to the message sending processing module.
  • the IP multimedia subsystem of the fusion fixed access method of the present invention and the implementation method thereof support the access mode of the fixed terminal in the IMS architecture, except the network element entities CSCF, MGCF, BGCF and HSS in the original IMS architecture.
  • the network element entity such as SLF
  • it also includes a fixed access proxy call session controller FP-CSCF.
  • the fixed access proxy call session controller FP-CSCF mainly performs the following functions: processing the SIP registration request initiated from the fixed user and forwarding to the I-CSCF to which the user belongs; processing the SIP message initiated by the fixed user and putting it Forward to CSCF, etc.; forward SIP requests and responses sent from CSCF to fixed users.
  • the interfaces related to the fixed-access proxy call session controller FP-CSCF are mainly: FP-CSCF and I-CSCF, FP-CSCF and S-CSCF, FP-CSCF and fixed users.
  • the FP-CSCF is the first network element node that the fixed user contacts the IMS subsystem; the interface between the FP-CSCF and the I-CSCF is sent to the I- as long as the registration signaling initiated by the fixed user is processed for the fixed user characteristics.
  • CSCF forwards the response sent by the I-CSCF to the fixed user, forwards a part of the fixed user-initiated session signaling to the I-CSCF, and forwards the session signaling sent by the I-CSCF to the fixed user.
  • the interface between the FP-CSCF and the S-CSCF is mainly to forward the session signaling sent by the fixed user to the S-CSCF, and forward the session signaling sent by the S-CSCF to the fixed user.
  • the implementation method of the fused and fixed access IP multimedia subsystem of the present invention mainly includes the following steps: First, under the original IMS architecture, the multimedia service of the 3G terminal user can be realized; the second step is to increase the fixed access. After the proxy call session controller FP-CSCF, it can provide fixed terminal user access in the IP multimedia subsystem, and realize the multimedia service function provided by the IP multimedia subsystem for the fixed user.
  • FIG. 4 is a schematic diagram showing an example of a system for supporting the present invention and a method for implementing the same in a WCDMA network supporting a fixed xDSL access method.
  • the fixed terminal (701, 702) is connected to the IMS system by the fixed access proxy call session controller (206) through the DSL access network, and The fixed user provides multimedia services on the IMS system, and finally implements on the IMS subsystem, which not only provides multimedia call control for the mobile terminal, but also achieves integration with the fixed access method.
  • the IP multimedia subsystem implements xDSL access and provides multimedia calls to the connected fixed terminals, according to the example shown in Figure 3, the following describes a mobile subscriber (601) calling xDSL access mode.
  • the typical process of the fixed end user (701) and the typical process of the fixed terminal user (701) in the xDSL access mode calling the PSTN/ISDN network (801), the specific process is as follows:
  • the mobile subscriber (601) and the fixed end user (701) of the xDSL access mode are all registered in the control of the IMS domain supported by the invention.
  • the mobile subscriber (601) performs the call session control via the radio network subsystem RNS (501) and the GGSN (401) and SGSN (402) network elements of the GPRS network and the first network element node that contacts the mobile subscriber with the IMS subsystem.
  • the P-CSCF (203) requests the fixed end user (701) of the xDSL access mode to establish a call;
  • the proxy call session controller P-CSCF (203) forwards the call request to the service call according to the name of the S-CSCF to which the mobile user registration process records.
  • the service call session controller S-CSCF (202) After receiving the call request, the service call session controller S-CSCF (202) processes the service demand of the mobile user (601) and performs destination address analysis, and finds that the destination user is a user under the home domain, and then forwards the call. Requesting an interrogation call session controller I-CSCF (201) to the home domain;
  • the call session controller I-CSCF (201) forwards the call request by querying the home subscriber server HSS (101) to learn that the user is a user to which the service call session controller S-CSCF (200) belongs. To the service call session controller S-CSCF (200);
  • the service call session controller S-CSCF (200) After the service call session controller S-CSCF (200) receives the call request, it finds that the destination user is a user registered by the fixed-access proxy call session controller FP-CSCF (206), and then forwards the call request to Fixed access proxy call session controller FP-CSCF (206);
  • the fixed-access proxy call session controller FP-CSCF (206) forwards the call request to the fixed terminal via the DSDSL access network's DSLAM (301) and DSL Modem (302) according to the registration information of the user (701). 701);
  • the fixed terminal (701) determines the media description information provided by the mobile terminal (601), and returns a response response to the fixed-access proxy call session controller FP ⁇ CSCF (206);
  • the fixed-access proxy call session controller FP-CSCF (206) authorizes related resources for the session and forwards Replying to the service call session controller S-CSCF (200);
  • the proxy call session controller P-CSCF (203) transmits the response response to the rotating user via the GGSN (401) and SGSN (402) network elements of the GPRS network, and the wireless network subsystem RNS (501) (601);
  • the mobile terminal After receiving the response, the mobile terminal (601) determines the media resources required for the session, and returns a response confirmation to the proxy call session controller P-CSCF (203);
  • Proxy call session controller P-CSCF (203) forward response confirmation to service call session controller S-CSCF (202);
  • Serving the call session controller S-CSCF (202) forwards the response confirmation to the inquiry call session controller I-CSCF (201);
  • the fixed-access proxy call session controller FP-CSCF (206) forwards the response to confirm the DSLAM (301) and the DSL Modem (302) of the xDSL access network to the fixed terminal (701);
  • the fixed terminal (701) After receiving the response confirmation, the fixed terminal (701) returns a confirmation confirmation to the fixed-access proxy call session controller FP-CSCF (206), and performs resource reservation;
  • fixed access proxy call session controller FP-CSCF (206) forward confirmation confirmation to the service call session controller S-CSCF (200);
  • Service Call Session Controller S-CSCF (202) Forward Confirmation Confirmation to Proxy Call Session Controller P-CSCF (203);
  • the proxy call session controller P-CSCF (203) passes the GGSN (401) and SGSN (402) network elements of the GPRS network, and the wireless network subsystem RS (501) confirms the confirmation before the transfer.
  • the mobile terminal (601) After receiving the confirmation confirmation, the mobile terminal (601) returns a success message to the proxy call session controller P-CSCF (203);
  • Proxy Call Session Controller P-CSCF (203) Forward Resource Reservation Success Message to Service Call Session Controller S-CSCF (202);
  • service call session controller S-CSCF (200) forward resource reservation success message fixed access proxy call session controller FP-CSCF (206);
  • Fixed access proxy call session controller FP-CSCF (206) forward resource reservation success message via DSDSL access network DSLAM (301) and DSL Modem (302) to fixed terminal (701);
  • the fixed terminal After receiving the initiator resource reservation success message, the fixed terminal reminds the fixed user (701), and sends a receiver resource reservation success message to the fixed-access proxy call session controller FP-CSCF (206);
  • the fixed-access proxy call session controller FP-CSCF (206) forwards the receiver resource reservation success message to the serving call session controller S-CSCF (200);
  • the serving call session controller S-CSCF (200) forwards the receiver resource reservation success message to the interrogating call session controller I-CSCF (201);
  • the proxy call session controller P-CSCF (203) passes the GGSN (401) and SGSN (402) network elements of the GPRS network, and the radio network subsystem RNS (501) forwards the receiver resource reservation success message to the mobile Terminal (601);
  • the fixed terminal (701) sends a temporary response ringing message to the fixed access proxy call session controller FP-CSCF (206);
  • the service call session controller S-CSCF (200) forwards to the inquiry call session controller I-CSCF (201) to temporarily respond to the ringing information;
  • the service call session controller S-CSCF (202) forwards to the proxy call session controller P-CSCF (203) to temporarily respond to the ringing information;
  • the proxy call session controller P-CSCF (203) passes the GGSN (401) and SGSN (402) network elements of the GPRS network, and the radio network subsystem RNS (501) forwards the temporary response ringing information to the mobile terminal ( 601);
  • the mobile terminal After receiving the temporary response ringing information, the mobile terminal (601) prompts the mobile user to remind the destination user;
  • the fixed end user (701) sends a final response to the call request to the fixed access proxy call session controller FP-CSCF (206);
  • Fixed access proxy call session controller FP-CSCF (206) forwards the final response of the call request to the serving call session controller S-CSCF (200);
  • the service call session controller S-CSCF (200) forwards the final response of the call request to the interrogating call session controller I-CSCF (201);
  • the service call session controller S-CSCF (202) forwards the final response of the call request to the proxy call session controller P-CSCF (203);
  • the proxy call session controller P-CSCF (203) passes the GGSN (401) and SGSN (402) network elements of the GPRS network, and the wireless network subsystem RNS (501) forwards the final response of the call request to the mobile user ( 601);
  • the mobile user After receiving the final response of the call request, the mobile user (601) returns a call confirmation message to the proxy call session controller P-CSCF (203);
  • Proxy call session controller P-CSCF (203) Forward call confirmation message to the service call session controller S-CSCF (202);
  • the service call session controller S-CSCF (202) forwards the call confirmation message to the inquiry call session controller I-CSCF (201);
  • Fixed access proxy call session controller FP-CSCF (206) forward call confirmation message via DSDSL access network DSLAM (301) and DSL Modem (302) to fixed terminal (701);
  • the mobile user hangs up and sends an on-hook message via the radio network subsystem RNS (501) and the GGSN (401) and SGSN (402) network elements of the GPRS network to the proxy call session controller P-CSCF. (203);
  • Proxy call session controller P-CSCF (203) forwards the on-hook request to the service call session controller S-CSCF (202);
  • the service call session controller S-CSCF (202) forwards the on-hook request to the inquiry call session controller I-CSCF (201);
  • Service Call Session Controller S-CSCF (200) Forward Call On Request to Fixed Access Proxy Call Session Controller FP-CSCF (206);
  • the fixed access proxy call session controller FP-CSCF (206) forwards the on-hook request message via the xDSL access network DSLAM (301) and DSL Modem (302) to the fixed terminal (701);
  • the fixed terminal (701) sends an on-hook response to the fixed-access proxy call session controller FP-CSCF (206);
  • Fixed access proxy call session controller FP-CSCF (206) forwards the on-hook response to the service call session controller S-CSCF (200);
  • the service call session controller S-CSCF (200) forwards the on-hook response to the inquiry call session controller I-CSCF (201);
  • the service call session controller S-CSCF (202) forwards to the proxy call session controller P-CSCF (203) to hang up response;
  • the proxy call session controller P-CSCF (203) passes the GGSN (401) and SGSN (402) network elements of the GPRS network, and the wireless network subsystem RNS (501) forwards the response to the mobile subscriber (601).
  • a mobile subscriber (601) as shown in FIG. 5 calls a fixed terminal user (701) in the HFC access mode. Call flow, similar to the call flow in xDSL access mode.
  • the main call process of the fixed terminal user (701) in the xDSL access mode calling the PSTN/ISDN network (801) can be roughly described as follows:
  • the fixed terminal user (701) in the xDSL access mode passes the DSLAM access network (DSL) (301) and the DSL Modem (302) and the fixed access proxy call session controller FP-CSCF (206) to the destination user ( 801) requesting to establish a call;
  • DSLAM access network DSL
  • DSL Modem DSL Modem
  • FP-CSCF fixed access proxy call session controller
  • the fixed access proxy call session controller FP-CSCF (206) forwards the call request to the service call session controller S-CSCF (200);
  • the egress gateway controller BGCF (204) determines that the destination user is a user under the PSTN network (901) interconnected by the network, and selects the media gateway controller MGCF (205) that interworks with the PSTN network (901), and The call request is sent to the media gateway controller MGCF (205);
  • the media gateway controller MGCF (205) notifies the media gateway MGW to establish a connection through the media gateway control protocol, and determines the media resource description information of the MGff;
  • the media gateway controller MGCF (205) includes the media resource description information allocated by the media gateway in the response response, and forwards to the egress gateway controller BGCF (204);
  • the egress gateway controller BGCF (204) forwards the response response to the service call session controller S-CSCF (200);
  • Fixed access proxy call session controller FP-CSCF (206) forward response response via DSDSL access network DSLAM (301) and DSL Modem (302) to fixed terminal (701);
  • the fixed end user (701) determines the media resource required for the session, and returns a response confirmation to the fixed-call proxy call session controller FP-CSCF (206);
  • Fixed access proxy call session controller FP-CSCF (206) forward response confirmation to service call session controller S-CSCF (200);
  • the service call session controller S-CSCF (200) sends a response confirmation to the egress gateway controller BGCF (204) for the resources required for the successful reservation session;
  • the egress gateway controller BGCF (204) forwards the response to the media gateway controller MGCF (205);
  • the media gateway controller MGCF (205) checks the connection through the media gateway control protocol, indicating the media gateway MGW Reserving the resources required by the session, and returning the confirmation message to the initiator;
  • the fixed access proxy call session controller FP-CSCF (206) forwards the confirmation to confirm the DSLAM (301) and the DSL Modem (302) of the xDSL access network to the fixed terminal (701);
  • the fixed terminal (701) After receiving the confirmation confirmation, the fixed terminal (701) returns a resource reservation success message to the fixed-access proxy call session controller P-CSCF (206);
  • Fixed access proxy call session controller FP-CSCF (206) forward resource reservation success message to service call session controller S-CSCF (200);
  • the egress gateway controller BGCK204 forwards the resource reservation success message to the media gateway controller MGCF (205);
  • the media gateway controller MGCF (205) After receiving the resource, the media gateway controller MGCF (205) initiates a call request message to the user (801) in the PSTN network via the PSTN network (901), and successfully reserves resources to the initiator.
  • the media gateway controller MGCF (205) After receiving the resource, the media gateway controller MGCF (205) initiates a call request message to the user (801) in the PSTN network via the PSTN network (901), and successfully reserves resources to the initiator.
  • the media gateway controller MGCF (205) after receiving the alert message sent by the user (801) in the PSTN network, sends a temporary response ringback message to the egress gateway controller BGCF (204);
  • the egress gateway controller BGCF (204) forwards the temporary response back ringing information to the serving call session controller S-CSCF (200);
  • the service call session controller S-CSCF (200) forwards the temporary response ringing information to the fixed access proxy call session controller FP-CSCF (206);
  • the fixed terminal (701) After receiving the temporary response ringing information, the fixed terminal (701) prompts the user to remind the destination user;
  • the media gateway controller MGCF (205) after receiving the response message sent by the user (801) in the PSTN network, sends a final response to the call request to the egress gateway controller BGCF (204);
  • the egress gateway controller BGCF (204) forwards the final response of the call request to the serving call session controller S-CSCF (200);
  • the service call session controller S-CSCF (200) forwards the final response of the call request to the fixed-access proxy call session controller FP-CSCF (206); 31, the fixed access proxy call session controller FP-CSCF (206) via the xDSL access network DSLAM (301) and DSL Modem (302) forward call request final response to the fixed terminal (701);
  • the fixed terminal (701) After receiving the final response of the call request, the fixed terminal (701) returns a call confirmation message to the fixed-access proxy call session controller FP-CSCF (206);
  • the service call session controller S-CSCF (200) forwards the call confirmation message to the egress gateway controller BGCF (204);
  • the egress gateway controller BGCF (204) forwards the call confirmation message to the media gateway controller MGCF (205);
  • the fixed end user (701) user establishes a media stream through the access gateway (301) of the PSTN/ISDN fixed terminal and the media gateway MGW on the PSTN side, and passes the PSTN network (901) and the user in the PSTN/ISDN network (801). ) to achieve the call;
  • the user (801) in the PSTN/ISDN network hangs up, and sends an on-hook message to the media gateway controller MGCF via the PSTN network (901) to the forward gateway call confirmation message (205);
  • the media gateway controller MGCF (205) releases the resources allocated for the session through the media gateway, and forwards the hang up request to the egress gateway controller BGCF (204);
  • the egress gateway controller BGCF (204) forwards the on-hook request to the service call session controller S-CSCF (200);
  • the service call session controller S-CSCF (200) forwards the on-hook request to the fixed-access proxy call session controller FP-CSCF (206);
  • the fixed-access proxy call session controller FP-CSCF (206) requests the fixed terminal user (701) via the DSLAM (301) and the DSL Modem (302) forward hang-up of the xDSL access network;
  • the fixed terminal (701) After receiving the on-hook request, the fixed terminal (701) returns to the on-hook response to the fixed-access proxy call session controller FP-CSCF (206);
  • the service call session controller S-CSCF (200) forwards the on-hook response to the egress gateway controller BGCF (204);
  • the egress gateway controller BGCF (204) forwards the on-hook response to the media gateway controller MGCF (205).
  • the invention provides a fixed terminal access mode such as xDSL/HFC/LAN based on the IMS architecture, and realizes the integration of the fixed network and the mobile network based on the IMS architecture.
  • the IMS architecture can provide rich multimedia services for mobile users, and achieves access independence in its architecture.
  • mobile users and fixed users have certain differences in user characteristics, access modes, charging methods, security modes, and the like. Therefore, the present invention provides a new fixed access proxy call session controller for the fixed access mode.
  • the access of the fixed terminal is realized, but also the difference between the mobile and the fixed access is abandoned at the I-CSCF and the S-CSCF, and the fixed convergence of the IMS architecture and the real convergence of the mobile network are realized, and the fusion system of the present invention It not only facilitates the use of users, but also enhances the market competitiveness of telecom operators.

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Description

一种融合固定接入的 IP名媒体子系统及其实现方法 技术领域
本发明涉及在 IP多媒体子系统(IP Multimedia Subsystem, 以下简称 IMS)体系架 构下, 融合固定终端接入方式的 IP多媒体系统及其实现方法。 背景技术
当前电信领域的交换系统,基本上都集中在固定网络交换系统和移动网络交换系统, 它们在运营环境中都是做为一种独立的系统出现, 要么只支持固定交换网络, 要么只支 持移动交换网络。 而目前国内外很多运营商都是全业务运营商, 他们既运营移动业务, 又运营固定业务, 对他们来说不仅要花费资金重复建设固定网络和移动网络, 还要花费 固定网络和移动网络的网络管理维护成本。 因此, 提出一种既支持固定接入方式又支持 移动接入方式的核心网络系统, 不仅可以降低运营商的投资建设成本, 又能减少网络的 网络管理维护成本。
IMS是 3GPP提出的叠加在 GPRS网络上支持 IP多媒体业务的子系统, 如图 1所示, 它的 核心特点是采用 SIP协议作为呼叫控制协议以及实现接入网络的无关性。 虽然 IMS实现接 入网络的无关性,但是, 目前 IMS只支持 2G和 3G的移动接入方式,还不能支持固定接入方 式, 在网络融合的发展趋势下, 国内外的一些工作组织、 运营商和设备商正在积极研究 基于 IMS的网络融合方案, 提供固定接入方式。
尽管国内外的一些工作组织、运营商和设备商正在积极研究基于 IMS的融合技术,但 是都处在起步阶段, 还没有形成一个统一的标准。 发明内容
本发明的目的是提供一种融合固定接入的 IP多媒体子系统及其实现方法, 基于 IMS 体系架构并支持固定终端接入; 固定终端的接入方式主要包括 xDSL、 HFC, LAN、 电线上 网接入 PLC以及光纤接入等方式,把固定终端用户连接到 IP网络,从而接入 IP多媒体子系 统, 实现基于 IMS体系架构支持固定网络和移动网络的相融合。
本发明的技术方案为- 一种融合固定接入的 IP多媒体子系统, 所述系统至少包括一呼叫会话控制器; 所述 呼叫会话控制器通讯连接有一归属用户服务器, 以及一出口网关控制器、 一媒体网关控 确 认 本 制器; 所述呼叫会话控制器通过所述出口网关控制器和所述媒体网关控制器连接有公用 电话网络; 所述呼叫会话控制器还通过一代理呼叫会话控制器连接无线接入网络; 其特 征在于, 所述系统还包括一固定接入的代理呼叫会话控制器, 连接所述呼叫会话控制器 和固定接入网络, 为固定接入方式的固定用户提供代理呼叫会话控制功能。
所述的系统, 其中, 所述固定接入的代理呼叫会话控制器还包括:
一消息接收处理模块,其包括一消息接收预处理模块以及一用户注册处理模块和一 用户呼叫处理模块;
一消息发送处理模块,所述消息接收处理模块接收来自用户或呼叫会话控制器的消 息并处理后通过所述消息发送处理模块向呼叫会话控制器或用户发送。
所述的系统, 其中, 所述消息接收预处理模块对所接收到的消息进行判别, 如果是 非 USIM/SIM卡用户的注册消息, 则由非 USIM/SIM卡注册用户预处理模块通过获取非 USIM/SIM卡用户的相关信息, 把该注册消息调整为 USIM/SIM卡用户的消息后发送给用户 注册模块进行用户身份的验证; 如果所述消息接收预处理模块识别所述接收到的消息为 USIM/SIM卡用户的注册消息, 则直接向所述用户注册处理模块发送消息, 并由所述用户 注册处理模块进行用户身份的验证; 如果是非注册消息, 则直接由所述用户呼叫处理模 块对消息进行与呼叫代理相关的消息转化、 计费话单、 资源分配等处理后向所述消息发 送处理模块发送。
所述的系统, 其中所述固定接入方式包括 xDSL、 HFC、 LAN, PLC或 FTTx。
一种融合固定接入的 IP多媒体子系统的实现方法, 所述方法包括:
在原有的 IP多媒体子系统的体系架构下, 增加固定接入的代理呼叫会话控制器, 在 所述 IP多媒体子系统中提供固定终端用户的接入, 为固定用户实现了 IP多媒体子系统提 供的多媒体服务。
所述方法还包括: 所述固定接入的代理呼叫会话控制器把从固定用户发起的注册请 求进行相关处理并前转到用户归属的询问呼叫会话控制器, 用于处理固定用户发起的消 息并把它前转到所述呼叫会话控制器; 把从所述呼叫会话控制器发送过来的请求和响应 前转到固定用户。
所述方法还包括: 与固定接入的代理呼叫会话控制器相关的接口包括与询问呼叫会 话控制器、 与服务呼叫会话控制器及与固定用户之间的接口, 所述与询问呼叫会话控制 器之间的接口用于把固定用户发起的注册信令经过针对固定用户特性的处理后发送到询 问呼叫会话控制器, 并把询问呼叫会话控制器发送来的响应前转到固定用户, 同时把一 部分固定用户发起的会话信令前转到询问呼叫会话控制器, 以及把询问呼叫会话控制器 发送来的会话信令前转到固定用户; 所述与服务呼叫会话控制器之间的接口是把固定用 户发送的会话信令前转到服务呼叫会话控制器, 把由服务呼叫会话控制器发送过来的会 话信令前转到固定用户。
本发明所提供的一种融合固定接入的 IP多媒体子系统及其实现方法, 由于为固定接 入方式提供了一个新的固定接入的代理呼叫会话控制器, 不仅实现了固定终端的接入, 而且在 I- CSCF和 S-CSCF处摒弃了移动和固定接入的差异,实现了 IMS体系架构的固定和移 动网络的真正的融合, 因此, 本发明的融合系统, 不仅方便了用户的使用, 而且提高了 电信运营商的市场竞争力。 附图说明
图 1是现有技术的 3GPP的 IMS核心控制层基本体系架构;
图 2是本发明的所述固定接入的代理呼叫会话控制器 FP-CSCF功能结构示意图; 图 3是本发明融合固定接入的 IP多媒体子系统及其实现方法支持固定接入的 IMS体系 架构示意图;
图 4是本发明系统及方法基于 3GPP体系架构下支持固定 xDSL接入方式的一种实例示 意图;
图 5是本发明系统及方法基于 3GPP体系架构下支持固定 HFC接入方式的一种实例示意 图。 具体实施方式
现结合附图详细说明本发明的实施方式。
本发明所述融合固定接入的 IP多媒体子系统及其实现方法,其核心发明点是针对 IMS 体系架构的核心网元实体, 提出一个新的逻辑网元实体一一固定接入的代理呼叫会话控 制器 FP-CSCF (Fixed Proxy Call Session Control Function, 以下简称: FP- CSCF), 为 xDSL/HFC/LAN/PLC/FTTx等固定接入方式的固定用户提供代理呼叫会话控制功能。
本发明系统支持固定终端接入方式的移动和固定网络相融合的体系架构, 主要由目 前 IMS体系架构下的呼叫会话控制器 CSCF (Call Session Control Function, 以下简称: CSCF), 媒体网关控制器 MGCF (Media Gateway Control Function, 以下简称: MGCF:)、 出口网关控制器 BGCF (Breakout Gateway Control Function, 以下简称: BGCF)、 归属 用户服务器 HSS ( Home Subscriber Server , 以下简称: HSS ) 以及用户定位器 SLF (Subscription Locator Function, 以下简称: SLF)等网元实体, 无线接入网络及其 移动终端,支持固定接入的代理呼叫会话控制控制器 FP- CSCF、固定接入网络及固定终端 组成, 如图 3所示的, 移动用户与固定终端用户之间可以经 IMS体系架构实现通信。
从功能上来说,代理呼叫会话控制器 P- CSCKProxy Call Session Control Function) 是 IMS子系统联系移动用户的第一个网元节点,它主要负责把移动用户发起的消息请求和 响应前转到用户归属的呼叫会话控制器 CSCF (Call Session Control Function), 把从 CSCF发送过来的消息请求和响应前转到移动用户, 维持移动用户和 P- CSCF之间的安全联 盟 SA (Security Association), 并提供移动用户和 P- CSCF之间 SIP消息压缩和解压功能 以及相关的计费功能。 不过, 固定用户和移动用户在用户特性、 接入方式、 计费方式以 及安全方式等等方面有一定的差别,从用户特性方面来说,移动用户有 SIM卡,而固定用 户目前没有 SIM卡, 将来可能有, 也可能没有, 也有可能是共存方式, 因此在与固定接入 相连的呼叫代理会话控制器同移动用户相连的呼叫代理会话控制器会有不同的处理方 法; 从接入方式来说, 移动的无线带宽非常宝贵, 所以信令需要压缩和解压, 而对于固 定用户来说, 带宽还是比较充裕的; 从计费方式来说, 移动用户和固定用户有着很大的 差别, 如移动用户呼出呼入目前都需计费, 而固定用户用户只有呼出计费, 而呼入不计 费; 从安全方式上来说, 移动接入和固定接入也有差别。 因此本发明提出一个新的固定 接入的代理呼叫会话控制器 FP- CSCF与原有的接入移动终端的代理呼叫会话控制器 P - CSCF区别出来, 为固定用户提供接入的代理方式。
本发明的所述固定接入的代理呼叫会话控制器 FP- CSCF, 其功能结构如图 2所示的, 来自用户 UE或 CSCF的消息, 被送入一消息接收处理模块。 所述消息接收处理模块包括一 消息接收预处理模块, 以及一用户注册处理模块和一用户呼叫处理模块; 所述消息接收 处理模块处理完的消息通过一消息发送处理模块向用户或 CSCF发送。 在所述消息处理模 块中,来自用户或 CSCF的消息首先进入所述 FP- CSCF的消息接收预处理模块,该消息接收 预处理模块对所接收的消息进行判别, 如果是非 USIM/SIM卡用户的注册信息, 则由非 USIM/SIM卡注册用户预处理模块通过获取非 USIM/SIM卡用户的相关信息、 把该注册消息 调整为 USIM/SIM卡用户的消息后发送给用户注册模块进行用户身份的识别和注册; 如果 所述消息接收预处理模块识别所述接收到的消息为 USIM/SIM卡注册用户, 则直接向所述 用户注册处理模块发送消息, 并由所述用户注册处理模块进行用户身份的验证; 如果是 非注册消息, 则直接由所述用户呼叫处理模块对消息进行与呼叫代理相关的消息转化、 计费话单、 资源分配等处理后向所述消息发送处理模块发送。
本发明的融合固定接入的 IP多媒体子系统及其实现方法,在 IMS体系架构下,支持固 定终端的接入方式, 除了包括原有 IMS体系架构下的网元实体 CSCF、 MGCF、 BGCF以及 HSS、 SLF等网元实体外, 还包括固定接入的代理呼叫会话控制器 FP- CSCF。 固定接入的代理呼 叫会话控制器 FP- CSCF主要完成以下功能: 把从固定用户发起的 SIP注册请求进行相关处 理并前转到用户归属的 I- CSCF;处理固定用户发起的 SIP消息并把它前转到 CSCF等;把从 CSCF发送过来的 SIP请求和响应前转到固定用户。 与固定接入的代理呼叫会话控制器 FP - CSCF相关的接口主要有: FP- CSCF与 I-CSCF、 FP- CSCF与 S-CSCF、 FP- CSCF与固定用 户之间的接口。 FP-CSCF是固定用户联系 IMS子系统第一个网元节点; FP- CSCF与 I-CSCF 之间的接口只要是把固定用户发起的注册信令经过针对固定用户特性的处理后发送到 I-CSCF, 并把 I- CSCF发送来的响应前转到固定用户, 同时把一部分固定用户发起的会话 信令前转到 I- CSCF,以及把 I- CSCF发送来的会话信令前转到固定用户; FP- CSCF与 S- CSCF 之间的接口主要是把固定用户发送的会话信令前转到 S- CSCF, 把由 S- CSCF发送过来的会 话信令前转到固定用户。
本发明的融合固定接入的 IP多媒体子系统的实现方法主要包括以下步骤: 第一步、 在原有的 IMS体系架构下, 能够实现 3G终端用户的多媒体业务; 第二步、增加固定接入的代理呼叫会话控制器 FP- CSCF后,能够在 IP多媒体子系统 中提供固定终端用户的接入, 为固定用户实现了 IP多媒体子系统提供的多媒体服务功 能。
如图 4所示是本发明系统及其实现方法在 WCDMA网络中支持固定 xDSL接入方式的一 种实例的示意图。主要是由归属用户服务器 HSS(101 )、服务呼叫会话控制器 S_CSCF(200、 202)、询问呼叫会话控制器 I- CSCF (201)、代理呼叫会话控制器 P- CSCF (203)、 出口网 关控制器 BGCF (204)、 媒体网关控制器 MGCF (205)、 固定接入的代理呼叫会话控制器
(206)、 分组交换网络设备 GGSN (401 )和 SGSN (402)、 无线网络子系统 RNS (501 )、 移动终端(601和 602)、xDSL接入方式的数字用户线接入复用器 DSLAM(301)和 DSL Modem
(302、 303)以及固定终端(701, 702)组成。除固定接入的代理呼叫会话控制器(206)、 DSL接入方式的一些设备 (301、 302、 303)和固定终端(701、 702和 703)外, 其余网 元实体可以实现目前 WCDMA网络中 IP多媒体业务, 并同 SIP AS、 0SA SCS以及智能网等 业务相结合,为移动用户提供丰富多彩的多媒体业务。在此基础上,固定终端(701、 702) 通过 DSL接入网络由固定接入的代理呼叫会话控制器(206)连接到 IMS系统,就可以为 固定用户在 IMS系统上提供多媒体业务, 最终实现在 IMS子系统上, 不仅提供了对移动 终端的多媒体呼叫控制, 而且实现了与固定接入方式的融合。为了更直观地了解这种 IP 多媒体子系统实现 xDSL接入方式,并为其连接的固定终端提供多媒体呼叫,按照图 3所示 的实例, 以下说明一个移动用户 (601 )呼叫 xDSL接入方式下的固定终端用户 (701)典 型流程, 以及 xDSL接入方式下的固定终端用户 (701) 呼叫 PSTN/ISDN网络的用户 (801 ) 的典型流程, 具体流程如下:
首先假设以下基本条件: 移动用户 (601)和 xDSL接入方式的固定终端用户 (701 ) 都注册在该发明支持的 IMS域的控制中。
移动用户 (601) 呼叫 xDSL接入方式的固定终端用户 (701 ) 主要呼叫流程可大致描 述如下:
1、移动用户 (601 )经无线网络子系统 RNS (501)和 GPRS网络的 GGSN (401 )和 SGSN ( 402) 网元以及与 IMS子系统联系移动用户的第一个网元节点代理呼叫会话控制器
P-CSCF (203) 向 xDSL接入方式的固定终端用户 (701 )请求建立呼叫;
2、代理呼叫会话控制器 P- CSCF (203)收到移动用户 (601 )建立的呼叫请求后, 根 据该移动用户注册流程所记录的所属的 S-CSCF名称, 前转呼叫请求到该服务呼叫会话控 制器 S-CSCF (202);
3、服务呼叫会话控制器 S- CSCF (202)收到呼叫请求后, 处理移动用户 (601 )的业 务需求并进行目的地址分析, 发现目的用户是本归属域下的一个用户, 便前转呼叫请求 到本归属域的询问呼叫会话控制器 I- CSCF (201 );
4、 询问呼叫会话控制器 I- CSCF (201 )通过向归属用户服务器 HSS (101 ) 査询, 获 知该用户是服务呼叫会话控制器 S- CSCF (200)所属的一个用户,便前转呼叫请求到服务 呼叫会话控制器 S- CSCF (200);
5、 服务呼叫会话控制器 S- CSCF (200)收到呼叫请求后, 发现目的用户是固定接入 的代理呼叫会话控制器 FP- CSCF (206)注册上来的一个用户, 便前转呼叫请求到固定接 入的代理呼叫会话控制器 FP- CSCF (206);
6、 固定接入的代理呼叫会话控制器 FP- CSCF (206)按照用户 (701 ) 的注册信息, 经 xDSL接入网络的 DSLAM (301)和 DSL Modem (302)前转呼叫请求到固定终端(701);
7、 固定终端 (701)收到呼叫请求后, 确定移动终端 (601)提供的媒体描述信息, 并向固定接入的代理呼叫会话控制器 FP~CSCF (206) 回应答响应;
8、 固定接入的代理呼叫会话控制器 FP- CSCF (206)为该会话授权相关资源, 并前转 应答响应到服务呼叫会话控制器 S- CSCF (200);
9、 服务呼叫会话控制器 S- CSCF (200) 前转应答响应到询问呼叫会话控制器 I- CSCF
(201 );
10、询问呼叫会话控制器 S- CSCF (201 )前转应答响应到服务呼叫会话控制器 S- CSCF
(202);
11、服务呼叫会话控制器 S- CSCF (202)前转应答响应到代理呼叫会话控制器 P- CSCF
(203);
12、代理呼叫会话控制器 P- CSCF (203)收到应答响应后, 经 GPRS网络的 GGSN (401 ) 和 SGSN (402) 网元, 无线网络子系统 RNS (501 )把应答响应前到转 动用户 (601 );
' 13、移动终端(601 )收到应答响应后, 决定本次会话所需的媒体资源, 并向代理呼 叫会话控制器 P- CSCF (203) 回响应证实;
14、代理呼叫会话控制器 P- CSCF (203)前转响应证实到服务呼叫会话控制器 S- CSCF (202);
15、服务呼叫会话控制器 S- CSCF (202)前转响应证实到询问呼叫会话控制器 I- CSCF (201);
16、 询问呼叫会话控制器 I- CSCF (201 ) 前转响应证实服务呼叫会话控制器 S- CSCF
(200) ;
17、服务呼叫会话控制器 S- CSCF (200)前转响应证实固定接入的代理呼叫会话控制 器 FP- CSCF (206);
18、 固定接入的代理呼叫会话控制器 FP- CSCF (206)前转响应证实经 xDSL接入网络 的 DSLAM (301 )和 DSL Modem (302) 到固定终端 (701);
19、 固定终端 (701)收到响应证实后, 向固定接入的代理呼叫会话控制器 FP- CSCF (206) 回证实确认, 并进行资源预留;
20、 固定接入的代理呼叫会话控制器 FP- CSCF (206) 前转证实确认到服务呼叫会话 控制器 S- CSCF (200);
21、服务呼叫会话控制器 S- CSCF (200)前转证实确认到询问呼叫会话控制器 I- CSCF
(201 );
22、询问呼叫会话控制器 I- CSCF (201 )前转证实确认到服务呼叫会话控制器 S- CSCF
(202);
23、服务呼叫会话控制器 S- CSCF (202)前转证实确认到代理呼叫会话控制器 P- CSCF (203);
24、代理呼叫会话控制器 P- CSCF (203)收到证实确认后, 经 GPRS网络的 GGSN (401 ) 和 SGSN (402) 网元, 无线网络子系统 R S (501 )把证实确认前到转移动终端 (601 );
25、 移动终端(601 ) 收到证实确认后, 向代理呼叫会话控制器 P-CSCF (203) 回资 源预留成功消息;
26、代理呼叫会话控制器 P- CSCF (203)前转资源预留成功消息到服务呼叫会话控制 器 S- CSCF (202);
27、服务呼叫会话控制器 S- CSCF (202)前转资源预留成功消息到询问呼叫会话控制 器 I- CSCF (201);
28、询问呼叫会话控制器 I- CSCF (201 )前转资源预留成功消息到服务呼叫会话控制 器 S- CSCF (200);
29、服务呼叫会话控制器 S- CSCF (200)前转资源预留成功消息固定接入的代理呼叫 会话控制器 FP-CSCF (206);
30、 固定接入的代理呼叫会话控制器 FP- CSCF (206)前转资源预留成功消息经 xDSL 接入网络的 DSLAM (301 )和 DSL Modem (302)到固定终端 (701 );
31、 固定终端收到发起方资源预留成功消息后, 提醒固定用户 (701), 并向固定接 入的代理呼叫会话控制器 FP- CSCF (206)发送接收方资源预留成功消息;
32、 固定接入的代理呼叫会话控制器 FP- CSCF (206) 向服务呼叫会话控制器 S-CSCF (200)前转接收方资源预留成功消息;
33、 服务呼叫会话控制器 S- CSCF (200) 向询问呼叫会话控制器 I-CSCF (201 )前转 接收方资源预留成功消息;
34、 询问呼叫会话控制器 S- CSCF (201 ) 向服务呼叫会话控制器 I- CSCF (202)前转 接收方资源预留成功消息;
35、 服务呼叫会话控制器 S- CSCF (202) 向代理呼叫会话控制器 P- CSCF (203)前转
•接收方资源预留成功消息;
36、代理呼叫会话控制器 P- CSCF (203)经 GPRS网络的 GGSN (401 )和 SGSN (402)网 元, 无线网络子系统 RNS (501 )把接收方资源预留成功消息前到转到移动终端 (601 );
37、 固定终端(701 )向固定接入的代理呼叫会话控制器 FP-CSCF (206)发送临时响 应振铃信息;
38、 固定接入的代理呼叫会话控制器 FP- CSCF (206) 向服务呼叫会话控制器 S- CSCF (200) 前转临时响应振铃信息;
39、 服务呼叫会话控制器 S- CSCF (200) 向询问呼叫会话控制器 I-CSCF (201)前转 临时响应振铃信息;
40、 询问呼叫会话控制器 S-CSCF (201 ) 向服务呼叫会话控制器 I- CSCF (202)前转 临时响应振铃信息;
41、 服务呼叫会话控制器 S-CSCF (202) 向代理呼叫会话控制器 P- CSCF (203)前转 临时响应振铃信息;
42、代理呼叫会话控制器 P-CSCF (203)经 GPRS网络的 GGSN (401)和 SGSN (402)网 元, 无线网络子系统 RNS (501 )把临时响应振铃信息前到转到移动终端 (601 );
43、 移动终端 (601 ) 收到临时响应振铃信息后, 提示移动用户正在提醒目的用户;
44、 固定终端用户 (701 )向固定接入的代理呼叫会话控制器 FP- CSCF (206)发送呼 叫请求的最终响应;
45、 固定接入的代理呼叫会话控制器 FP- CSCF (206) 向服务呼叫会话控制器 S-CSCF (200)前转呼叫请求的最终响应;
46、 服务呼叫会话控制器 S- CSCF (200) 向询问呼叫会话控制器 I-CSCF (201 )前转 呼叫请求的最终响应;
47、 询问呼叫会话控制器 S- CSCF (201 ) 向服务呼叫会话控制器 I-CSCF (202) 前转 呼叫请求的最终响应;
48、 服务呼叫会话控制器 S- CSCF (202) 向代理呼叫会话控制器 P- CSCF (203)前转 呼叫请求的最终响应;
49、代理呼叫会话控制器 P- CSCF (203)经 GPRS网络的 GGSN (401 )和 SGSN (402)网 元, 无线网络子系统 RNS (501 )把呼叫请求的最终响应前到转到移动用户 (601 );
50、 移动用户 (601 ) 收到呼叫请求的最终响应后, 向代理呼叫会话控制器 P- CSCF (203) 回呼叫确认消息;
51、 代理呼叫会话控制器 P- CSCF (203) 前转呼叫确认消息到服务呼叫会话控制器 S-CSCF (202);
52、 服务呼叫会话控制器 S- CSCF (202)前转呼叫确认消息到询问呼叫会话控制器 I-CSCF (201);
53、 询问呼叫会话控制器 I- CSCF (201 ) 前转呼叫确认消息到服务呼叫会话控制器 S-CSCF (200); 54、服务呼叫会话控制器 S- CSCF (200)前转呼叫确认消息到固定接入的代理呼叫会 话控制器 FP- CSCF (206);
55、 固定接入的代理呼叫会话控制器 FP- CSCF (206)前转呼叫确认消息经 xDSL接入 网络的 DSLAM (301 )和 DSL Modem (302) 到固定终端 (701 );
56、 移动用户 (601 )与固定终端用户(701)之间建立媒体流, 实现通话;
57、通话结束后,移动用户(601 )挂机,并发送挂机消息经无线网络子系统 RNS (501 ) 和 GPRS网络的 GGSN (401 )和 SGSN (402) 网元到代理呼叫会话控制器 P- CSCF (203);
58、代理呼叫会话控制器 P- CSCF (203)前转挂机请求到服务呼叫会话控制器 S- CSCF (202);
59、服务呼叫会话控制器 S- CSCF (202)前转挂机请求到询问呼叫会话控制器 I-CSCF (201 );
60、询问呼叫会话控制器 I- CSCF (201 )前转挂机请求到服务呼叫会话控制器 S- CSCF (200)';
61、服务呼叫会话控制器 S- CSCF (200)前转挂机请求到固定接入的代理呼叫会话控 制器 FP- CSCF (206);
62、 固定接入的代理呼叫会话控制器 FP- CSCF (206) 前转挂机请求消息经 xDSL接入 网络的 DSLAM (301 )和 DSL Modem (302) 到固定终端 (701 );
63、 固定终端 (701)向固定接入的代理呼叫会话控制器 FP- CSCF (206)发送挂机响 应;
64、 固定接入的代理呼叫会话控制器 FP- CSCF (206) 向服务呼叫会话控制器 S- CSCF (200)前转挂机响应;
65、 服务呼叫会话控制器 S-CSCF (200) 向询问呼叫会话控制器 I- CSCF (201 )前转 挂机响应;
66、 询问呼叫会话控制器 S- CSCF (201 ) 向服务呼叫会话控制器 I- CSCF (202) 前转 挂机响应;
67、 服务呼叫会话控制器 S- CSCF (202) 向代理呼叫会话控制器 P- CSCF (203)前转 挂机响应;
68、代理呼叫会话控制器 P- CSCF (203)经 GPRS网络的 GGSN (401 )和 SGSN (402)网 元, 无线网络子系统 RNS (501 )把挂机响应前到转到移动用户 (601)。
同样, 如图 5所示的一个移动用户(601 )呼叫 HFC接入方式下的固定终端用户(701 ) 呼叫流程, 类似于 xDSL接入方式下的呼叫流程。
xDSL接入方式下的固定终端用户(701 )呼叫 PSTN/ISDN网络的用户(801 )主要呼叫 流程可大致描述如下:
1、 xDSL接入方式下的固定终端用户(701 )经 xDSL接入网络的 DSLAM(301 )和 DSL Modem (302) 以及固定接入的代理呼叫会话控制器 FP- CSCF (206) 向目的用户 (801 )请求建 立呼叫;
2、固定接入的代理呼叫会话控制器 FP-CSCF (206)前转呼叫请求到该服务呼叫会话 控制器 S-CSCF (200);
3、服务呼叫会话控制器 S- CSCF (200)收到呼叫请求后, 对目的用户进行号码分析, 发现目的用户是 PSTN网络的用户, 便发送呼叫请求到出口网关控制器 BGCF (204);
4、 出口网关控制器 BGCF (204)测定目的用户是本网络互连的 PSTN网络(901 )下 的一个用户, 便选择与 PSTN网络(901)互通的媒体网关控制器 MGCF (205), 并把呼叫 请求发送到媒体网关控制器 MGCF (205);
5、媒体网关控制器 MGCF (205)通过媒体网关控制协议通知媒体网关 MGW创建连接, 并确定 MGff的媒体资源描述信息;
6、 媒体网关控制器 MGCF (205)把媒体网关分配的媒体资源描述信息包含在应答响 应中, 前转到出口网关控制器 BGCF (204);
7、出口网关控制器 BGCF (204)前转应答响应到服务呼叫会话控制器 S- CSCF (200);
8、 服务呼叫会话控制器 S- CSCF (200)前转应答响应到固定接入的代理呼叫会话控 制器 FP- CSCF (206);
9、固定接入的代理呼叫会话控制器 FP- CSCF (206)前转应答响应经 xDSL接入网络的 DSLAM (301 )和 DSL Modem (302) 到固定终端 (701 );
10、 固定终端用户(701 )收到应答响应后, 决定本次会话所需的媒体资源, 并向固 定接入的代理呼叫会话控制器 FP- CSCF (206) 回响应证实;
11、 固定接入的代理呼叫会话控制器 FP- CSCF (206)前转响应证实到服务呼叫会话 控制器 S- CSCF (200);
12、 服务呼叫会话控制器 S-CSCF (200) 向出口网关控制器 BGCF (204)发送成功预 留会话所需资源的响应证实;
13、 出口网关控制器 BGCF (204)前转响应证实到媒体网关控制器 MGCF (205);
14、媒体网关控制器 MGCF (205)通过媒体网关控制协议检验连接,指示媒体网关 MGW 预留会话所需资源, 并向发起方回证实确认消息;
15、证实确认消息经出口网关控制器 BGCF(204)到服务呼叫会话控制器 S- CSCF(200);
16、服务呼叫会话控制器 S- CSCF (200)前转证实确认到固定接入的代理呼叫会话控 制器 FP- CSCF (206);
17、 固定接入的代理呼叫会话控制器 FP- CSCF (206)前转证实确认经 xDSL接入网络 的 DSLAM (301 )和 DSL Modem (302) 到固定终端 (701 );
18、 固定终端 (701 ) 收到证实确认后, 向固定接入的代理呼叫会话控制器 P- CSCF (206) 回资源预留成功消息;
19、 固定接入的代理呼叫会话控制器 FP- CSCF (206)前转资源预留成功消息到服务 呼叫会话控制器 S- CSCF (200);
20、服务呼叫会话控制器 S- CSCF (200), 向出口网关控制器 BGCF (204)发送资源预 留成功消息;
21、出口网关控制器 BGCK204)前转资源预留成功消息到媒体网关控制器 MGCF(205);
22、媒体网关控制器 MGCF (205)收到发起方已成功预留资源后, 经 PSTN网络(901 ) 向 PSTN网络中的用户 (801 ) 发起呼叫请求消息, 并向发起方回成功预留资源的消息;
23、 媒体网关控制器 MGCF (205) 收到 PSTN网络中的用户 (801 )发送来的提醒消息 后, 向出口网关控制器 BGCF (204) 发送临时响应回振铃信息;
24、 出口网关控制器 BGCF (204)前转临时响应回振铃信息到服务呼叫会话控制器 S-CSCF (200);
25、 服务呼叫会话控制器 S-CSCF (200) 向固定接入的代理呼叫会话控制器 FP- CSCF (206)前转临时响应振铃信息;
26、 固定接入的代理呼叫会话控制器 FP- CSCF (206)经 xDSL接入网络的 DSLAM (301 ) 和 DSL Modem (302)前转临时响应振铃信息到固定终端 (701 );
27、 固定终端 (701 ) 收到临时响应振铃信息后, 提示用户正在提醒目的用户;
28、 媒体网关控制器 MGCF (205) 收到 PSTN网络中的用户 (801 ) 发送来的应答消息 后, 向出口网关控制器 BGCF (204) 发送呼叫请求的最终响应;
29、 出口网关控制器 BGCF (204) 前转呼叫请求的最终响应到服务呼叫会话控制器 S-CSCF (200);
30、 服务呼叫会话控制器 S- CSCF (200) 向固定接入的代理呼叫会话控制器 FP- CSCF (206)前转呼叫请求的最终响应; 31、 固定接入的代理呼叫会话控制器 FP- CSCF (206)经 xDSL接入网络的 DSLAM (301 ) 和 DSL Modem (302)前转呼叫请求的最终响应到固定终端 (701 );
32、 固定终端(701 )收到呼叫请求的最终响应后, 向固定接入的代理呼叫会话控制 器 FP- CSCF (206) 回呼叫确认消息;
33、 固定接入的代理呼叫会话控制器 FP- CSCF (206)前转呼叫确认消息到服务呼叫 会话控制器 S- CSCF (200);
34、 服务呼叫会话控制器 S-CSCF (200)前转呼叫确认消息到出口网关控制器 BGCF (204);
35、 出口网关控制器 BGCF (204)前转呼叫确认消息到媒体网关控制器 MGCF (205);
36、固定终端用户(701)用户经 PSTN/ISDN固定终端的接入网关(301 )和 PSTN侧的媒 体网关 MGW建立媒体流, 并通过 PSTN网络 (901) 与 PSTN/ISDN网络中的用户 (801 ) 实现 通话;
37、 通话结束后, PSTN/ISDN网络中的用户 (801 )挂机, 并发送一挂机消息经 PSTN 网络(901 ) 到前转呼叫确认消息到媒体网关控制器 MGCF (205);
38、媒体网关控制器 MGCF (205)通过媒体网关释放为该会话分配的资源, 并前转挂 机请求到出口网关控制器 BGCF (204);
39、出口网关控制器 BGCF (204)前转挂机请求到服务呼叫会话控制器 S- CSCF (200);
40、 服务呼叫会话控制器 S- CSCF (200) 向固定接入的代理呼叫会话控制器 FP- CSCF (206)前转挂机请求;
41、 固定接入的代理呼叫会话控制器 FP- CSCF (206)经 xDSL接入网络的 DSLAM (301 ) 和 DSL Modem (302)前转挂机请求到固定终端用户 (701 );
42、 固定终端 (701 ) 收到挂机请求后, 向固定接入的代理呼叫会话控制器 FP- CSCF (206) 回挂机响应;
43、 固定接入的代理呼叫会话控制器 FP- CSCF (206) 前转挂机响应到服务呼叫会话 控制器 S- CSCF (200);
44、服务呼叫会话控制器 S- CSCF (200)前转挂机响应到出口网关控制器 BGCF (204);
45、 出口网关控制器 BGCF (204) 向媒体网关控制器 MGCF (205)前转挂机响应。 本发明所提出的一种基于 IMS体系架构的提供 xDSL/HFC/LAN等固定终端接入方式, 实现了基于 IMS体系架构的支持固定网络和移动网络的相融合。 目前 IMS的体系架构可 以为移动用户提供丰富多彩的多媒体业务,而且在它的体系架构上实现了接入的无关性, 但是移动用户和固定用户在用户特性、 接入方式、 计费方式以及安全方式等等方面有一 定的差别,因此本发明为固定接入方式提供了一个新的固定接入的代理呼叫会话控制器, 不仅实现了固定终端的接入,而且在 I- CSCF和 S- CSCF处摒弃了移动和固定接入的差异, 实现了 IMS体系架构的固定和移动网络的真正的融合, 本发明的融合系统不仅方便了用 户的使用, 而且提高了电信运营商的市场竞争力。
以上详细说明了本发明系统及其实现方法的工作原理, 并给出了几种典型的网络结 构流程, 但应当指出的是, 上述说明只是为了便于理解而举出的具体实施例, 不应被视 为是对本发明保护范围的限制。 同样, 根据本发明的技术方案及其较佳实施例的描述, 可以做出各种可能的等同改变或替换, 而所有这些改变或替换都应属于本发明所附权利 要求的保护范围。

Claims

权利要求
1、 一种融合固定接入的 IP多媒体子系统,所述系统至少包括一呼叫会话控制 器; 所述呼叫会话控制器通讯连接有一归属用户服务器, 以及一出口网关控制器、 一媒 体网关控制器; 所述呼叫会话控制器通过所述出口网关控制器和所述媒体网关控制器连 接有公用电话网络; 所述呼叫会话控制器还通过一代理呼叫会话控制器连接无线接入网 络; 其特征在于, 所述系统还包括一固定接入的代理呼叫会话控制器, 连接所述呼叫会 话控制器和固定接入网络, 为固定接入方式的固定用户提供代理呼叫会话控制功能。
2、 根据权利要求 1所述的系统, 其特征在于, 所述固定接入的代理呼叫会话 控制器还包括:
一消息接收处理模块,其包括一消息接收预处理模块以及一用户注册处理模块和一 用户呼叫处理模块;
一消息发送处理模块,所述消息接收处理模块接收来自用户或呼叫会话控制器的消 息并处理后通过所述消息发送处理模块向呼叫会话控制器或用户发送。
3、 根据权利要求 2所述的系统, 其特征在于, 所述消息接收预处理模块对所 接收到的消息进行判别, 如果是非 USIM/SIM卡用户的注册消息, 则由非 USIM/SIM卡注册 用户预处理模块通过获取非 USIM/SIM卡用户的相关信息, 把该注册消息调整为 USIM/SIM 卡用户的消息后发送给用户注册模块进行用户身份的验证; 如果所述消息接收预处理模 块识别所述接收到的消息为 USIM/SIM卡用户的注册消息, 则直接向所述用户注册处理模 块发送消息, 并由所述用户注册处理模块进行用户身份的验证; 如果是非注册消息, 则 直接由所述用户呼叫处理模块对消息进行与呼叫代理相关的消息转化、 计费话单、 资源 分配等处理后向所述消息发送处理模块发送。
4、 根据权利要求 3所述的系统, 其特征在于, 所述固定接入方式包括 xDSL、 HFC、 LAN、 PLC或 FTTx。
5、 一种融合固定接入的 IP多媒体子系统的实现方法, 所述方法包括: 在原有的 IP多媒体子系统的体系架构下, 增加固定接入的代理呼叫会话控制器, 在 所述 IP多媒体子系统中提供固定终端用户的接入, 为固定用户实现了 IP多媒体子系统提 供的多媒体服务。
6、 根据权利要求 5所述的方法, 其特征在于, 所述方法还包括: 所述固定接 入的代理呼叫会话控制器把从固定用户发起的注册请求进行相关处理并前转到用户归属 的询问呼叫会话控制器, 用于处理固定用户发起的消息并把它前转到所述呼叫会话控制 器; 把从所述呼叫会话控制器发送过来的请求和响应前转到固定用户。
7、 根据权利要求 5所述的方法, 其特征在于, 所述方法还包括: 与固定接入 的代理呼叫会话控制器相关的接口包括与询问呼叫会话控制器、 与服务呼叫会话控制器 及与固定用户之间的接口, 所述与询问呼叫会话控制器之间的接口用于把固定用户发起 的注册信令经过针对固定用户特性的处理后发送到询问呼叫会话控制器, 并把询问呼叫 会话控制器发送来的响应前转到固定用户, 同时把一部分固定用户发起的会话信令前转 到询问呼叫会话控制器,以及把询问呼叫会话控制器发送来的会话信令前转到固定用户; 所述与服务呼叫会话控制器之间的接口是把固定用户发送的会话信令前转到服务呼叫会 话控制器, 把由服务呼叫会话控制器发送过来的会话信令前转到固定用户。
PCT/CN2005/000284 2005-03-08 2005-03-08 Sous-systeme multimedia ip pour integration d'acces fixe et procede associe Ceased WO2006094433A1 (fr)

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Citations (2)

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WO2005002171A1 (en) * 2003-06-27 2005-01-06 Nokia Corporation Method and system for data transmission
CN1588899A (zh) * 2004-08-04 2005-03-02 北京朗通环球科技有限公司 终端接入控制装置及基于网际协议的多媒体通信系统

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
WO2005002171A1 (en) * 2003-06-27 2005-01-06 Nokia Corporation Method and system for data transmission
CN1588899A (zh) * 2004-08-04 2005-03-02 北京朗通环球科技有限公司 终端接入控制装置及基于网际协议的多媒体通信系统

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