CN100372342C - Method for providing service to circuit field user via group field - Google Patents

Abstract

The present invention relates to a packet network and the circuit domain network domain fused, discloses a method of providing a service through a CS user packet domain, so that the user can directly access the IMS fixed network, using the IMS services, and fixed and mobile networks integration and service reuse. By extension to the present invention MGCF, S-CSCF, AS and other functions of the network node, so that not only support the IMS and CS domain interworking fixed network calls, may also be provided for the service by the fixed network domain IMS subscriber circuit; wherein, the MGCF can be determined that the letter after fixed path so that the user domain circuit MGCF whether the IMS service subscription and triggers IMS session, S-CSCF processing sessions, routing control, according to IMS service subscription information triggered AS, AS the fixed network service control CS user, there is provided IMS services; HSS also extended function for fixed network and storage management CS user in an IMS subscription service data.

Description

TECHNICAL FIELD The service provided by the CS user packet domain present invention relates to a circuit domain network and a packet domain network convergence, and more particularly to method for providing a packet service domain through the CS user. BACKGROUND optical communication technology and broadband Internet Protocol (Internet Protocol, referred to as "IP") support the rapid development of punching technique, making communications backbones network already has a strong ability to support applications, the bandwidth is no longer the major carriers doing business difficult. But from the point of view of the development of the global telecommunications market, voice and data services market increasingly saturated, resulting in operators facing business growth began to decline every year, more and more difficult predicament customer development. Therefore, whether new operators or traditional operators are looking for new market opportunities and business models, and thus for the creation of new business growth and attract more potential users. Public telephone networks due to the limitations of its circuit-switched (Circuit Switching, referred to as "CS"), limiting the diversity of its business development for mobile business users, personalized services and multimedia business needs of the public telephone network can not meet the basic . At the same time, computer technology and network technology innovation has changed the needs of users of services, only the public telephone network or the Internet can not satisfy user demand for integrated voice, data and images. Operators need a next-generation network architecture to provide next-generation solutions for multimedia services, to create new business growth. The existing fixed network CS user through digital program-controlled switches and intelligent network to provide all kinds based public switched telephone network (Public Switched Telephone Network, "PSTN") or an integrated services digital network (Integrated Services Digital Network, referred to as "ISDN ") business and business intelligence. On the one hand, due to the close connection with call control and service control, service deployment so slow, high cost; on the other hand, digital program-controlled switches and intelligent network can only provide a simple electrical

Road business domain, a single user human-computer interaction, poor service experience, business users are not enthusiastic, is not conducive to the promotion of business. With the rapid development under the personal mobile communication networks, mobile networks grew, and IP network will eventually dominate the world background, the development trend of fixed-line Next Generation Network (Next Generation Networks, referred to as "NGN") must be the integration with a variety of network , such as fusion domain and packet domain circuit, and the like and fixed-mobile convergence of. Packet domain or the circuit domain fusion is one of research focus, wherein the third generation mobile communication Partnership Project (3rd Generation Partnership Project, referred to as "3GPP") in the R5 / R6 standard proposed IP-based multimedia subsystem (IP based Multimedia Subsystem, referred to as "IMS") that is specifically designed for next-generation all-IP mobile multimedia network design system, focusing on carrying mobile multimedia services using IP network, allowing operators and end users get from innovative multimedia services in a faster, more flexible applications, thereby increasing revenue for operators, to create profits. IMS is a 3G mobile network implementing the packet voice and packet data, the target network to provide uniform multimedia services and applications. Because of the increasingly fierce market competition, the existing circuit-switched system will be phased out and replaced by an open, scalable, acquisition and maintenance costs more affordable IP-based hardware systems. 3GPP system then gradually move to a full IP-based core network. 3GPP regulation "Fan also increasingly highlighted the importance of IP infrastructure and introduces the concept of IMS, one hopes to provide traditional circuit-switched services (such as voice service) in the form of IP, the second is hope to achieve through this subsystem All multimedia services to users. IMS is a packet switched domain (Packet Switching, referred to as an extension "PS" :) core network, designed independently of the PS core network. Using the IP packet domain as control signaling and media transmission bearer channel using a session initiation protocol (Session Initiation Protocol, referred to as "SIP") as a call control signaling protocol to establish, maintain and terminate the voice and multimedia processes, to achieve the business three management, session control and bearer access separated. IMS multimedia traffic gives a few examples of the following: 1. a user when you answer the phone all the way, and receive another incoming IP video phone, the user decides to not answer the videophone, but

It transferred to a voice mail system. Then, he will receive a video message in their mailbox notification. 2. When a user all the way to answer the phone, and receive another incoming IP video phone, the user decides to answer the new phone, but he hopes he can switch between the two calls. 3. Lay the users did not receive any calls, he modify their own user settings file to all of those who are not high priority and they do not know calls are transferred elsewhere. However, in this case the user can still receive all e-mail and text messages, no i Lun these messages and information who had sent him. Figure l shows a frame structure and IMS functional entities. Defined by 3GPP IMS frame structure comprises a call session control function (Call Session Control Function, referred to as "CSCF"), media gateway control function (Media Gateway Control Function, referred to as "MGCF"), IMS Media Gateway (IMS - Media GateWay, Acronym "IMS-MGW"), multimedia resource function controller (multimedia resource function controller, abbreviated "MRFC"), multimedia resource function processor (multimedia resource function processor, referred to as "MRFP"), Breakout gateway control function (Breakout gateway control function , referred to as "BGCF"), and IMS application server (application server, referred to as "AS") and home subscriber server (Home Subscriber server, referred to as "HSS") and other functional entities. CSCF which is the core of the network, supports SIP protocol processing SIP session, divided into asking CSCF (Interrogatmg-CSCF, referred to as "I-CSCF") and services CSCF (Serving-CSCF, referred to as "S-CSCF"). Proxy CSCF (Proxy CSCF, said cartridge "P - CSCF") is a user equipment (User Equipment, referred to as "UE") access to the inlet of the IMS system, realized in the SIP proxy (Proxy) and a user agent (UserAgent) function; MGCF and IMS - MGW is a functional entity CS domain and PSTN interworking, are responsible for controlling the exchange signaling and media streams; MRFC and MRFP are functional entities to achieve multi-party conference, the control plane MRFC MRFP through H.248 control ; BGCF is the demarcation point IMS domain and the external network, select it in the CS domain or where interconnection with the PSTN.

In IMS, a unified service provided by the application server AS, session control performed by S-CSCF, the two are completely separated on the network architecture, traffic triggered by S-CSCF to the AS through the subscription rule processing, among a plurality of AS may work together. IMS user through a current location visited domain position of the node P-CSCF to access the IMS, session, and total service control node by the home domain completed subscription location, session control and service control function of the access independent IMS. IMS user subscription data in the HSS centralized management. The MGCF and IMS interworking call achieved by fixed circuit domain media gateway control node: i.e. the IMS domain between user domains and the fixed network subscriber circuit, can call each other mutually. Compared to other business, IMS business has many advantages, such as its support for self-WEB, users can conduct business very intuitive self-management and service customization, such as customized intelligent routing, ring tones, caller-color images, tasks and reminders, distinctive ringing, abbreviated numbers, outgoing call restrictions, barring of incoming calls and other services, greatly simplifying the business user subscription and registration procedures. Addition, IMS provides service support terminal through some control agent (e.g., WEB Client mode), click on the graphical interface control business processes, user traffic can be very intuitive operation, such as a click dialing, conference click, click on hold, recovery click, click transfer click queue, click exit, click ON and other business operations, greatly simplifying the complicated operation procedure when the user using the service. Further, since the IMS core network the 3GPP standard defined for the mobile network, to provide services for mobile users, if in case of a fixed terminal or capability allows some control in the case of the agent through the terminal fitting, for fixed CS user services, and equipment reuse, savings operators to invest, but also bring new business growth fixed-line users, the benefits are self-evident, therefore IMS-based network convergence solution is current research focus. Fusion IMS based network program object is to be IMS SIP session based on a common platform, while supporting a variety of fixed and mobile access, to achieve convergence of fixed and mobile networks. But due to technical limitations, only support IMS interworking call between the fixed network CS user and an IMS domain user, and can not provide services through the IMS domain user circuit for the fixed network, the fixed network interworking CS user during a call, call signal IMS makes routing without the aS; when the IMS to provide services, call signaling route S-CSCF is triggered to the aS IMS, service control is completed by the aS. IMS supports fixed network, i.e. in claim NGN IMS supports a variety of fixed access and mobile access to this technical problem is the industry. Although IMS call control the use of the Internet Engineering Task Force (Internet Engineering Task Force, referred to as the "IETF") provisions of S1P agreement, but the characteristics of mobile access were appropriate to enhance and give up, mainly in registration, authentication and session terms of strategies, processes and specific provisions of the IETF's news there are some differences, so the circuit switched domain user to access IMS needs to re-enact the session protocol. In order to provide a fixed current CS domain user traffic service, PSTN / ISDN networks fixed user access via digital PBX services and intelligent network node. Since the program call control and service control functions done in the same network node, inflexible and not conducive to the rapid deployment and expansion of the business. Modify a function may lead to change another function, increasing the potential risks; deploy and expand business even cause some to upgrade the entire network nodes, high cost, slow deployment. Second, since the digital program-controlled switches and intelligent network can offer a simple circuit domain service, the user of a single human-computer interaction, the service experience is poor, the user can use the service by dialing a key way on the fixed terminal, provided services, the user need to remember a variety of business code or even business process, business users are not enthusiastic, is not conducive to the promotion of business. Further, although the conventional IMS provides service management, session control mechanism for three separate bearer access and can provide rich multimedia services a packet-based network and the IMS network structure also supports fixed-mobile convergence service, but the IMS standards supports only users and fixed network domain interworking call circuit, does not provide support for the fixed-line business applications CS user. So when operators have both IMS and fixed networks, the need to develop repeat business to provide IMS services to fixed-line users. In practical applications, the presence of the above-described embodiment the following problems: high fixed network users directly supplied to the circuit domain through the network node traffic program cost, slow deployment, and a single user interface, is not conducive to the promotion; and prior to the IMS network through the solid network users to provide business solutions you need to develop repeat business,

Not directly fixed network users accessing IMS services, high operating costs. The main reason for this situation is that the existing fixed-line circuit-switched inflexible, costly network facilities; and IMS network does not provide direct user access to fixed-line session protocol, the fixed-line users can not use the direct services provided by the IMS . SUMMARY OF THE INVENTION Accordingly, the main object of the present invention is to provide a method for providing a service by a CS user packet domain, so that the user can directly access the IMS fixed network, using the IMS services, and fixed and mobile networks in the service level integration and reuse "to achieve the above object, the present invention provides a method of providing a service through a CS user packet domain, comprising the following steps, based on the control function determines the signaling path in internet protocol multimedia subsystem media gateway whether the CS user through the fixed network of the media gateway control function subscribes to an internet protocol multimedia subsystem service, and if necessary converting the signaling message and the message contents parameters, to initiate a corresponding service call session control function sends the session protocol request message; a serving call session control function in response to a session initiation protocol from the media gateway control function request message to obtain the service subscription information after the current target of processing session control, service request message to the corresponding application server transmits a session initiation protocol ; the application server Session initiation protocol response from the serving call session control function request message, acquires the current processing target domain service service control circuit after the user subscription information. Wherein, in the home internet protocol multimedia subsystem based on the storing subscription information of the user with the fixed network server domain associated user circuit, other devices for query and download the multimedia subsystem in an internet protocol.

The session initiation protocol request message to the fixed network subscriber's telephone number Circuit City using a Session Initiation Protocol Uniform Resource Locator format. When the fans CS user calling user, the method further comprises the step of determining whether the circuit domain network subscribes to the service based on the Internet Protocol multimedia subsystem according to the user subscription information field circuit, if it is then the call routing control function to the media gateway, and a circuit indicated by the inter-exchange signaling domain network based on the need of an Internet protocol multimedia subsystem-based call control service users: the media gateway control function according to the circuit domain network interoffice signaling is determined for the CS domain user and the user subscription service based on the internet protocol multimedia subsystem, the server electronically encoded by querying the CS domain user number is converted into a session initiation protocol uniform resource Locator 4 kinds, then the calling serving call session control function sends a session initiation protocol request message contains information indicating that the user is a subscription user circuit domain based internet protocol multimedia subsystem service indication information and the calling party using a session initiation protocol uniform resource locator format telephone number; the calling serving call session control System response function from a media gateway control function a session initiation protocol request message, wherein the indication information is determined according to the user subscription CS user and an Internet Protocol Multimedia Subsystem service, acquired by the user home subscriber server query method after the service subscription information of the call session control of the user, and sends a session initiation protocol request message service corresponding application server, which contains the user subscription for indicating that the circuit user indication field based on internet protocol multimedia subsystem services information; the application server a session initiation protocol response from the serving call session control function request message, wherein the indication information is determined according to the user subscription-based CS user and an internet protocol multimedia subsystem service through the home subscriber server the method of obtaining the query after the user service contract information of the service user's call control, after processing to the calling serving call session control function returns a session initiation protocol request message; the calling serving call session control Send function in the application server receives the session returned

Since the protocol request message, the user continues processing circuit domain service trigger session addressing or routing. The CS domain when the called user is dead, and it has entered the outgoing signaling path based on the Internet Protocol multimedia system, the method further comprises the step of fans, on the outgoing call signaling path, calling call session control function serving a user domain address of the routing circuit, through an electronic query server, the encoding CS domain user number is converted into a session initiation protocol uniform resource Locator format, then the called serving call session control function routes and sending the session initiation protocol request message, wherein the session initiation protocol uniform resource locator called subscriber number format; the called serving call session control function to obtain the circuit domain user subscription information by the home subscriber server query methods, transmitted to the respective service called the application server a session initiation protocol request message; the called application server through the home subscriber server inquiry method of the circuit domain user subscription information, the service control of the CS domain user, processed after the control function to the called serving call session Back to the session initiation protocol request message; the called serving call session control function of the called application server returns a response to a session initiation protocol request message, the user continues processing circuit domain service triggering domain routing or Internet Protocol Multimedia Subsystem-based session; the called serving call session control function is triggered after processing operations and multimedia subsystem domain routing protocol based on the internet, the domain of the called user to the current circuit is a circuit for addressing domain routing, the CS domain subscriber number recovered from a session initiation protocol uniform resource Locator format of the original format of the CS domain, as the called number and transmits the request message to a Breakout gateway control function by the session initiation protocol, Breakout gateway control function by this route the call to the the circuit domain network. When the called user is a user of the circuit, and which does not enter the outgoing signaling path based on the internet protocol multimedia subsystem, the method comprising the steps of,

Analyzing the circuit domain network according to the user subscription information field circuit call if it subscribes to an Internet Protocol Multimedia Subsystem service, and if so, the call routing control function to the media gateway, and through the circuit domain network Board between signaling indicating a need-based Internet protocol multimedia subsystem provides service control for the called user; the media gateway control function according to the inter-office signaling circuit domain network determines that the user is a CS user and subscription-based Internet protocol multimedia subsystem service, the subscriber number conversion circuit domain by querying a server for the electronic coding a session initiation protocol uniform resource Locator format, then the control function sends a session initiation protocol request message to the corresponding called party serving call session using a session initiation protocol uniform resource locators called number format; the called serving call session control function in response to a session initiation protocol from the media gateway control function request message, a home Subscriber server obtained by query method after the service subscription information of the user user's call Session control line, and the corresponding request message service application server transmits a Session Initiation Protocol; the application server a session initiation protocol response from the called serving call session control function request message, the home subscriber server obtained by the user query method after the service subscription information of the user of the call control service, after processing to the called serving call session control function returns a session initiation protocol request message; the called serving call session control function in response to the called application server returning a session initiation protocol request message, the user continues processing circuit domain service triggering based multimedia subsystem domain routing or internet protocol session; the called serving call session control function based on the internet protocol multimedia service trigger and processed after routing the IMS domain, a user domain will be called the current circuit route addressing circuit domain, the CS domain user number to recover from a session initiation protocol uniform resource Locator format of the original gamut format circuit, and as a sending a session called number Protocol request message to the egress gateway control functions, breakout gateway control function by this route the call to the circuit domain network.

The correspondence relationship storage management server said electronic encoding a session initiation protocol uniform resource locator to the subscriber number of the circuit domain, providing mutual queries the session initiation protocol between a uniform resource locator with the CS domain user number . The Session Initiation Protocol request message, by extending the definition of "object" parameter "call information" field of the header, indicates to the calling user and the CS user subscription service based on the Internet Protocol Multimedia Subsystem; and the calling serving call session control function server application and the call processing, calling user determines the "object" of requests received session initiation protocol message "call information" header field parameter expansion is defined as CS user and an internet protocol multimedia subsystem-based subscription service. Said circuit comprising a domain user number information in the subscription information, the called subscriber number is obtained by the CS domain of the subscription information, implemented in the domain based on an internet protocol multimedia subsystem service is processed on the circuit domain network u routing address corresponding to the domain user subscription information stored in said circuit management server of the home user, said circuit comprising a domain user subscription information and routing information based on the internet protocol multimedia subsystem service. The Session Initiation Protocol Multimedia Subsystem service request trigger message in an Internet Protocol address as the destination Public Service Identity. When the calling subscriber CS user, comprising the steps, which determines the circuit domain network subscribes to the service based on the Internet Protocol multimedia subsystem according to the user subscription information field circuit, the call to the routing media gateway control function, and the circuit domain network via inter-exchange signaling indicating a need-based Internet protocol multimedia subsystem providing a service control the calling subscriber; the media gateway control function according to the inter-exchange signaling circuit domain network CS user is determined and user-based subscription service internet protocol multimedia subsystem, and to obtain the corresponding public service identity, according to the subscription information, and then sends the session initiation to the respective service call session control function

Protocol request message, which contains the Public Service Identity; the serving call session control function server by a user query methods to obtain the sweeping Public Service Identity belongs to the subscription corresponding to the information, and then sends a Session Initiation Protocol Application Server to the appropriate service request message, which contains the public service identity; the application server by the HSS inquiry method of the public service identity corresponding to subscription information, a user of the service control domain circuit, after processing to the serving call session control function returns a session initiation protocol request message; a serving call session control function after receiving the application server returns a session initiation protocol message request, or to continue processing service trigger route addressing. When the CS domain user is a called user, and which has entered the outgoing signaling path a multimedia subsystem based on Internet Protocol, the method further comprises the steps of, in the outgoing call signaling path, a service call session control function said circuit domain user routing address, the routing to the called Breakout gateway control function; the Breakout gateway control function is routed to the called media gateway control function; the media the multimedia subsystem gateway control function Internet protocol service processing flag determines whether or not the called service has been treated, if so, then the called route network to the CS domain, or the user determines that the user is a circuit domain and subscription-based internet protocol multimedia subsystem services and obtain information in accordance with the subscription of the respective public service identity, and then sends a session initiation protocol request message to the appropriate serving call session control function, which comprises using the public service identity, while the multimedia subsystem service processing flag is set based on the internet protocol user; said server Call Session Control Function queries a Home Subscriber Server obtained by the method corresponding to the Public Service Identity subscription information, and then sends a session initiation protocol request message to the service corresponding application server, which contains the Public Service Identity; by the application server the home subscriber server queries the way to get the public service

Subscription information corresponding to the identification, user domain service control said circuit, after processing to the service control function returns the call session a session initiation protocol request message; a serving call session control function server receiving the application after returning the session initiation protocol message request, or to continue processing service trigger route addressing. Said circuit is a user of the called user, and which does not enter the outgoing signaling path based on the internet protocol multimedia subsystem, comprising the steps of, in accordance with the circuit domain network user subscription information field of the call circuit Analyzing its signed service based on the Internet protocol multimedia subsystem, the control function routes the call to the media gateway, and information indicating the circuit domain network via inter-exchange signaling; the media gateway control function according to the circuit domain network interoffice signaling is determined for the CS domain user and the user subscription based internet protocol multimedia subsystem service, and to give the corresponding public service identity, according to the subscription information, the control function sends a session initiation protocol request message to the corresponding service call session, which contains the public service identity; the serving call session control function to obtain the public service identity subscription information corresponding to the home subscriber server query methods, and then sends a session initiation protocol request message to the service corresponding application server, which comprises the public service identity; should the Server through the HSS inquiry method of the Public Service Identity information corresponding to the subscription, the service control circuit domain user, the processing is completed after the service call session control function returns a Session Initiation Protocol message to the request; the serving call session control function receives the session initiation protocol application server returns a message of the request, or to continue processing service trigger route addressing. The session initiation protocol request message, the Public Service Identity as the destination address identifies bearing plant. The Session Initiation Protocol request message, the called user by the elimination CS user numbers

Interest bearing body planted. The serving call session control function, the application server obtains the called user in the CS domain user number to the message body of a Session Initiation Protocol request message received, for an Internet Protocol multimedia subsystem domain of after processing for routing traffic on the circuit domain network address; also used to control the traffic of the application server. Subscription information and the storage management services corresponding Public Service Identity at the home subscriber server, the Public Service Identity including the service subscription data, the calling or called Public Service Identity service attribute. The application server according to the subscription data of the Public Service Identity in the calling or called attributes, is determined to provide the service to a control circuit domain calling user or the called user CS domain. Further comprising the step, all the circuit domain network will route the call to the media gateway control function; the media gateway control function to intercept the call, is determined by the user authentication process and the CS user's subscription based on the Internet Protocol multimedia subsystem service, if an Internet protocol multimedia subsystem session is triggered, otherwise the call back to the circuit domain network. Further comprising the step, the CS domain user directly dial the called number dialed, analysis of the circuit domain network service access code after the service access code, and routing the call to the media gateway control function ; the media gateway control function to intercept the call, is determined by the user authentication process and the CS user subscription service based on the internet protocol multimedia subsystem, if it is an internet protocol multimedia subsystem session is triggered, otherwise the said call back to the circuit domain network. Further comprising the step of, when the session initiation protocol request message by transmitting information about the Public Service Identity user of the circuit domain, the media gateway control function determines that the CS user and user subscription-based

The Internet Protocol Multimedia Subsystem service, the user according to the service subscription information field of said circuit, to give the corresponding Public Service Identity. In the circuit domain network, the calling by the originating office switch or a tandem office switch determines the user's CS domain calling user subscribes to the circuit domain services based on the Internet Protocol Multimedia Subsystem of. When the session initiation protocol request message to the information passed through the circuit user domain Public Service Identity, the originating office switch or a tandem office exchange service according to the subscription information of a particular combination of prefix. In the circuit domain network, a CS domain user to the called office switch or a tandem office floor switch circuit determines that the called user subscribes to the multimedia subsystem domain services based on the Internet Protocol. When the session initiation protocol request message to the information passed through the circuit user domain Public Service Identity, the floor office switch or a tandem office exchange service according to the subscription information of a particular combination of prefix. Arranged fixed home location register in the circuit domain network, the user domain call circuit past the fixed network home location register, by determining whether the CS user subscribes to an Internet Protocol Multimedia Subsystem service of. When information relevant to the domain of the user circuit Session Initiation Protocol request message transmitted by the Public Service Identity, the home location register of the fixed network subscription information of a specific composition according to the service prefix. Inter-domain network of the circuit of the circuit domain network Board sent to the media gateway control function for the initial address message signaling integrated services digital network user part of the signaling, the "called party number of the Initial Address Message "parameter by the CS user called number prefix add specific composition, for indicating the CS domain user subscribes to the service based on the internet protocol multimedia subsystem of. The media gateway control function after receiving the initial address message, the specific prefix code number analysis, determining whether the CS user subscribes to an Internet Protocol Multimedia Subsystem service of. When the session initiation protocol request message passing user information field by the circuit Public Service Identity, the specific prefix code is the circuit domain network according to the CS user

It based on internet protocol multimedia subsystem service subscription information generated by combining the media gateway control function to obtain the Public Service Identity translation according to the particular prefix. The media gateway control function after receiving the initial address message, according to the "called party number" parameter, to obtain the CS domain user of the called number. When the media gateway control function to the serving call session control function routes the data set by the configuration of the routing table to obtain service call session control function routing address. The home subscriber server query method comprising the steps of determining whether the originator of the query message to query whether locally, if so, a direct call local information, or the query to the home subscriber server and downloads the information to be queried ; retains initiator of the query store query information, and updating aging; wherein the query originator is the serving call session control function, any one of the application server. Can be found by comparing the difference aspect of the present invention and the prior art that the present invention is by extension of the MGCF, S-CSCF, AS and other functions of the network node, so that not only support the IMS and CS domain interworking fixed network calls, further may be provided by the IMS user service for fixed circuit domain; wherein, MGCF signaling path can be determined through the fixed network domain user circuit MGCF whether the IMS service subscription and triggers IMS session, S-CSCF processing sessions, routing control, according to IMS services subscription information triggered AS, AS CS user is fixed network service control, to provide IMS services; HSS also extended function for fixed network and storage management CS user in an IMS subscription service data. The difference this solution brings obvious benefit that provides services using IMS for fixed circuit domain users, and business has nothing to do with the network, greatly accelerate service deployment and expansion, greatly reduce the low-cost service customization; at the same time IMS also bring new business for the fixed network CS user experience, improved user interface, user-friendly operation, improve user enthusiasm, bring new business growth point for operators; while achieving fixed and mobile networks in business reuse and integration, reduce operating

Operating costs. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic view of the frame structure and functional IMS entities; Figure 2 is an example of a user trigger IMS service processing flow in accordance with one embodiment of the present invention; FIG. 3 is a PSI embodiment IMS service triggering process flow in accordance with one embodiment of the present invention. . DETAILED DESCRIPTION To make the objectives, technical solutions, and advantages of the present invention will become apparent in conjunction with the accompanying drawings below of the present invention will be described in further detail. A session processing method and related flow fixed network users access the IMS according to the present invention are given fixed frame circuit domain and the IMS network and the IMS session handling practices. First, the fixed-line users identified by the Public Service Identity (Public Service Identity, referred to as "PSI") in the IMS domain can be identified by a SIP Uniform Resource Locator (Universal Resource Locator, referred to as "URL") or subscription information through its IMS service, the the corresponding user subscription information from the HSS or PSI maintenance management, query download for other functional entities. Secondly, if the fixed network user subscription for the IMS service-discrimination, is determined by the PSTN network initiating node and then forwarded to MGCF, the MGCF may also be forwarded directly determined. In the service request into the IMS domain by itself, or after an IMS domain, the S-CSCF or MGCF determines triggered session, and according to the service subscription information of the corresponding AS routes the session, the service control performed by the AS to the fixed network users, providing IMS service. At the end of the service, BGCF be routed back PSTN, processing IMS domain ending. Throughout this process, the session satisfies the IMS domain SIP protocol rules, but requires information carried in the call related information necessary or relevant information contained in the subscription information request S1P. Thereby achieving IMS for fixed-line users and provide direct access to IMS services. The essence of the invention is to be described in detail, a possible embodiment given below under various circumstances. In one embodiment of the present invention, employed in the IMS domain ID SIPURL fixed network users, IMS business processes triggered by the user. In many cases the user domain calling and called fixed circuits and the like, which access process depicted in Figure 2. FIG 2 (a) shows a process when the IMS service of the calling user according to a fixed network CS domain embodiment of the present invention. In step 211, first, the fixed network CS domain user initiates a call, PSTN subscription information of the calling user according to the service is judged that the IMS service subscription, routing the call to the MGCF, and the MGCF indicates that the call is not a call exchange, and IMS calling user is required to provide service control. In one embodiment of the present invention, using the inter-exchange signaling PSTN transmission indicator to the MGCF. There are many inter-exchange signaling PSTN, in the preferred embodiment of the present invention, wherein using one of the ISDN User Part (ISDN User Part, referred to as "ISUP") initial address message (Initial Address Message signaling, referred to as "IAM") is described. Wherein the IAM message indicating that the call is a fixed network subscription and the IMS service user. In one preferred embodiment of the present invention, PSTN sends an IAM message to the MGCF, through the IAM mandatory parameter "called party number" add a specific prefix to indicate that the calling user subscribes to an IMS service, the need to provide IMS service control. Proceeds to step 212, after the MGCF receives the IAM message, the message in the "called number" for number analysis, it is determined that the calling user subscribes to the service according to their particular IMS prefix code, and removes the prefix code obtained real PSTN number of the called party. Since the IMS network user identifier is SIPURL format, the PSTN subscriber number in E.164 format is represented, therefore, the MGCF needs to first server to the electronic coding (Electronic Numbering Server, referred to as "ENUM Server") requesting the caller number from E.164 format translated into SIP URL format. Here ENUM Server relational storage management requires a corresponding conversion of fixed CS user number of SIP URL domain. And then proceeds to step 213, ENUM Server query by configuring the calling party number from E.164

Format translated into SIPURL format and translates the results back to the MGCF. Then proceeds to step 214, MGCF converts the IAM message translated to SIP request (INVITE) message, the source address in the INVITE message using the SIP URL format after translation. At the same time the caller indicated in the INVITE message is a fixed network CS domain user, the subscription service indication in the IMS. In one embodiment of the present invention, there is provided by the calling user or the called user, "call information" (Call-Info) header in the INVITE message with additional information about the parameter "object" (Purpose) extended definition indication is fixed calling user subscribes CS user and an IMS service. The MGCF sends an INVITE message to the S-CSCF1. (Where treated with S-CSCFl S-CSCF on behalf of the calling session control, i.e. the calling party S-CSCF; S "Representative CSCF2 process called S-CSCF session control, i.e. the called S-CSCF) then proceeds to step 215, after the S-CSCF1 receives the INVITE message, the calling user session control process. determines that the calling user according to the purpose parameter value in the message Call-Info header field is fixed CS user and an IMS subscription service .S-CSCF 1 subscription data of the user query if there is a request to the HSS to download the user subscription data .S-CSCFl AS1 according to the IMS triggers a service subscription rules downloaded user (here denoted by AS1 is calling for service control , i.e. the calling party AS; AS2 expressed is called service control, i.e., the called party AS), S-CSCFl to ASl sends an INVITE message, the message indicates to the calling subscriber is still fixed CS user and an IMS subscription the traffic then proceeds to step 216, when the IMS receives ASl [NVITE message, according to the purpose parameter message Call-Info header field is determined that the caller is directly fixed each electrically ^ J: or a user subscribes to an IMS service and ASl. queries the user's subscription data if not, Requesting the HSS to download user subscription data. AS1 according to the user subscription data download result, the corresponding service control processing is completed, transmits an INVITE message to the S-CSCFl. Finally, in step 217, S-CSCFl receiving the INVITE message, to continue the calling user to the called user or service triggering routing address. If you continue new service AS is triggered, S-CSCFl transmits a new INVITE message to the AS, the message indicates to the calling subscriber is still fixed

Circuit City and signed the IMS service user, process re-enters step 216; otherwise, S-CSCF1 performs a routing function for addressing the called subscriber. FIG 2 (b) shows a process when the IMS service domain user according to a fixed circuit embodiment of the present invention is called and exhalation path into the IMS domain. When an incoming call a fixed network subscriber circuit domain, the incoming call requires a certain service provided by the IMS application control for the called user, and the first half of the call, i.e., outgoing signaling path has entered the IMS, service calling subscriber processed, IMS for fixed circuit addressing domain called user. First, in step 221, S-CSCF1 fixed network CS domain called user address, called address format to E.164, ENUM Server requests to the called subscriber number is translated into the E.164 format from the SIP URL format. Then proceeds to step 222, ENUM Server query by arranging the sheath 4 from the calling subscriber number in E.164 format translated to SIP URL format, and returns the result to the translation S-CSCF1. Proceeds to step 223, S-CSCF1 obtained SIPURL format called party number, the called party sends an INVITE message to the home domain S-CSCF2, called address in the message format using the SIP URL translations. S-CSCF1 for the S-CSCF2 exactly the same routing and addressing methods 3GPP IMS standard defined by the present invention is not described. Then proceeds to step 224, S-CSCF2 receiving the INVITE message, the called user session control process. Query the called user subscription data if there is a request to the HSS to download and triggers a service subscription rules according to IMS AS2 downloaded to the user, the application service provide control of the called user AS2. S-CSCF2 sends an INVITE message to AS2. Then proceeds to step 225, IMS AS2 receives the INVITE message, the called user's subscription data query if there is a request to the HSS to download, and the download result data according to the user subscription, the service control corresponding application, the process is completed, the S -CSCF2 sends an INVITE message. Then proceeds to step 226, S-CSCF2 receiving the INVITE message from the AS, continues to

Called user or service triggering routing address. If you continue new service AS is triggered, then the S-CSCF2 sends an INVITE message to the new AS, AS receives new INVITE message, the flow proceeds to step 225 again. Otherwise S-CSCF2 for the current route addressing the called user. If the called party does not occur due to changes of the service control AS, S-CS [the called user requests previously downloaded from the subscription data in the HSS F2 is determined there is a valid "CS domain Routing Number", the "specific prefix code" 1 + skin called PSTN user number "component, the" specific prefix code "indicating the S-CSCF2 does not require translation request again ENUM Server E.164 format called number, the S-CSCF2 PSTN number as the called subscriber INVITE after the called address in the message sent to the BGCF, proceeds to step 227. otherwise continue the current S-CSCF2 transdermal ^ f the called subscriber routing or addressing the IMS ^. in step 227, BGCF receives the INVITE message, the call is routed Between PSTN, the same process definition 3GPPIMS standards continue to be called user addressed by the PSTN in FIG. 2 (C) shows a fixed CS user in accordance with one embodiment of the present invention is called outgoing path and does not enter the IMS domain IMS service process flow, a fixed domain user incoming circuit, the incoming call requires a certain service provided by the IMS application control for the called user, and the first half of the call - i.e., outgoing signaling path and without IMS. follows the flow shown in FIG. first, In step 231, a fixed incoming CS user, PSTN IAM message is received, subscription information of the called user determines that the called user subscribes 1MS service, PSTN sends an IAM message to the MGCF, and indicating that the called user subscribes to an IMS service, called user to indicate a preferred embodiment of the present invention, when the PSTN sends an IAM message to the MGCF, through mandatory parameter in the IAM message increases a specific prefix "called party number" IMS subscribes business, it is necessary to provide IMS service control then proceeds to step 232, MGCF receives the IAM message, the message in the "called number" for number analysis, it is determined that the called user according to a specific IMS service prefix code signing after, remove the prefix of the called user to get real PSTN number u MGCF requests to ENUM Server

Called number from E.164 format translated into SIP URL format. Proceeds to step 233, ENUM Server configured by the called subscriber number from the query E.164 format translates SIP URL format, and returns the result to the translation MGCF. Proceeds to step 234, MGCF converts the IAM message is translated to a SIP INVITE message, the called address of the INVITE message using the SIP URL format translations. Proceeds to step 235, S-CSCF2 receiving the INVITE message, the called user session control process. Query the called user subscription data if there is a request to the HSS to download and triggers a service subscription rules according to IMS AS2 downloaded to the user, the application service provide control of the called user AS2. S-CSCF2 sends an INVITE message to AS2. Proceeds to step 236, IMS AS2 receives the INVITE message, the called user's subscription data query if there is a request to the HSS to download, and the download result data according to the user subscription, the corresponding service control processing is completed, the S-CSCF2 sends an INVITE message. Proceeds to step 237, S-CSCF2 receiving the INVITE message from the AS, continues to: so called user or service triggering route addressing. If you continue new service AS is triggered, then the S-CSCF2 sends a new INVITE message AS, AS receives new INVITE message, the flow proceeds to step 236 again. Otherwise 3 "[8? Two pairs of current routing address of the called user. If the called party does not occur due to changes of the service control AS, the S-CSCF2 called user determines previously requested subscription data downloaded from the HSS in the presence of a valid "CS domain Routing Number", the "specific prefix code" + "is the calling subscriber's PSTN number "component, the" specific prefix code "indicating the S-CSCF2 does not require translation request again ENUM Server E.164 format called number, the S-CSCF2 PSTN number as the called subscriber INVITE message called party address to the BGCF, proceeds to step 238. Otherwise S-CSCF2 continue addressing current called user in the IMS domain. After step 238, BGCF receives the INVITE message, the call is routed to the PSTN, the same process 3GPPIMS standard definition. Continue to the called user addressed by PSTN. In one embodiment of the present invention, the MGCF through data configuration, a selected

S-CSCF for routing, such as specifying a class of the user or corresponding to a S-CSCF directly in the configuration data. In one embodiment of the present invention, it is determined that the user is 1MS the PSTN subscription characteristic and through a specific notification message via MGCF prefix, the prefix code number MGCF analysis determines that the user subscribes to an IMS service, the request to ENUM Server E.164 PSTN number format caller or the called subscriber translated into SIP URL format. In another embodiment of the present invention, PSTN is not determined, PSTN user calls unconditionally routed directly to the MGCF, the user authentication process provided for by the MGCF function call interception, if the user subscribes to an IMS service, the MGCF requests to ENUM Server PSTN number E.164 format caller or the called user translated to SIP URL format; if no IMS services subscription, MGCF returns the call to the PSTN. Embodiment, the fixed network CS user can directly dial the called number dialing, PSTN for service access code number IMS service access code analysis In another embodiment of the present invention, the call is routed to MGCF, provided by the MGCF user authentication processing function call interception, if the user subscribes to an IMS service, the MGCF requests the PSTN number to ENUM Server E.164 format caller or called subscriber translated to SIP URL format; if no IMS services subscription, MGCF a call back to the PSTN. In one embodiment of the present invention, provided effective "CS domain Routing Number" in the IMS subscription data of the user in the CS domain via a fixed, is processed so that after the IMS domain of the called user's fixed network service control circuitry, the call You can enter the PSTN domain addressing the called subscriber. Those skilled in the art will appreciate, in addition to setting method, "circuit switched domain routing number" other than the subscription data, so that the method may take any of the IMS domain after the processing of the called user's fixed network service control circuits, S-CSCF possible to retrieve the called user's PSTN number, and the call is made to the BGCF respective ^, of the present invention to achieve the object, without affecting the spirit and scope of the invention. In one embodiment of the present invention, the use of IMS for fixed service identifier PSI users,

IMS business processes triggered by the PSI. In many cases the user domain calling and called fixed circuits and the like, which access process are shown in Figure 3. In the embodiment SIP URL identifying the calling user and the called fixed network CS domain solid network CS user a significant difference in the IMS domain call flow is: S-CSCF1 is necessary to determine the current session, the calling party is a fixed network and a CS user subscribes 1MS service, if the user subscription data does not exist will be tilted downward and crashed to the request, this is an extension to the standard definition of a flow of 3GPPIMS; S-CSCF2 and if they find the called subscription data does not exist, the request can go to download, which define the process line with 3GPP IMS standards. Springs for the IMS service triggering PSI, the download process can be made to the IMS CS domain calling fixed network subscription service subscription data also meet the definition of 3GPP IMS standards. FIG. 3 (a) shows the IMS service processing flow according to the calling fixed network CS user to an embodiment of the present invention. In step 311, the fixed network CS domain user initiates a call, PSTN is judged that the IMS service subscription, subscription information of the calling user according to the combination of a specific IMS service prefix according to service subscription information of the calling user and the service prefix code added to the front of the IAM parameter "called party number", and sends an IAM message to the MGCF. Proceeds to step 312, MGCF receives the IAM message, the message in the "called number" for number analysis, it is determined that the calling user subscribes to the service according to their particular IMS service prefix, the prefix code service translated a corresponding PSI, and removes the prefix of the called user obtained real PSTN number. MGCF converts the IAM message translated into the INVITE message, the IMS standard defined by the PSI filled INVITE message. In one embodiment of the present invention, the MGCF number of the called PSTN user fill in other regions of the INVITE message, such as message body carried in the INVITE message (Message body). MGCF sends to the S-CSCF2 INVITE message, S-CSCF2 MGCF method of obtaining routing address defined for 3GPP IMS standards. Proceeds to step 313, S-CSCF2 blind ITE receives message, determining whether PSI corresponding service subscription data exists, if not, the request to the HSS to download. According to the contract rules downloaded

Then trigger a IMS AS2. S-CSCF2 sends the INVITE message to the AS2 then proceeds to step 314, AS2 receives the INVITE message, the called party number extracted from the message in a particular area, and determines whether the PSI corresponding service subscription data exists, if not, then to HSS request download. The subscription data obtained tilted downward and crashed, the subscription data indicates that the calling service call is triggered, the AS2 of the caller corresponding service control processing is completed, transmits an INVITE message to S-CSCF2. Proceeds to step 315, S-CSCF2 receiving the INVITE message from the AS2 continue for service triggering for PSI addressing or routing. If continued new service AS is triggered, SC.SCF2 sending new INVITE message to the AS is triggered, the process proceeds to step 314; if the routing address, S-CSCF2 remove the current message from the called address in a particular area addressing the route. FIG 3 (b) shows a process when the IMS service domain user according to a fixed circuit embodiment of the present invention is called and exhalation path into the IMS domain. When an incoming call a fixed network subscriber circuit domain, the incoming call requires a certain service provided by the IMS application control for the called user, and the first half of the call, i.e., outgoing signaling path has entered the IMS, service calling subscriber processed, IMS for fixed circuit addressing domain called user. First, in step 321, S-CSCF fixed network CS domain called user address, called address format to E.164, ENUM Server requests to the translation fails, S-CSCF routes the session to BGCF. Next in step 322, BGCF then be routed to the MGCF. Then proceeds to step 323, MGCF receives the INVITE message, the called user is determined fixed circuit domain IMS service has not processed, then the called subscriber service authentication process, if the called user subscribes to an IMS service, according to the MGCF the specific service subscription information corresponding to a combination of the PSI; If the called party does not subscribe IMS service or has been treated IMS service, MGCF to route the call to the PSTN. IMS standard defined by the MGCF PSI fill the INVITE message, the calling subscriber and a PSTN number ^^ skin fill message in other regions. The INVITE message to the MGCF

S-CSCF2 transmission, MGCF to give S-CSCF2 routing address 3GPP IMS standard defined method. The called user while MGCF processed flag is set IMS services. Proceeds to step 324, S-CSCF2 receiving the INVITE message, determining whether PS1 To header field corresponding service subscription data exists, if not, the request to the HSS to download. According to the rules of the downloaded signed, triggering a IMSAS2. S-CSCF2 sends the INVITE message to the AS2 then proceeds to step 325, the AS2 receives the INVITE message, the called party number extracted from the message in a particular area, and determines whether the PSI corresponding service subscription data exists, if not, then HSS request to download. (In this subscription data, indicating that this can be called service trigger), the called user according to the subscription data obtained tilted downward and crashed corresponding service control processing is completed, transmits an INVITE message to S-CSCF2. Proceeds to step 326, S-CSCF2 receiving the INVITE message from the AS2 continue for service triggering for PSI addressing or routing. If continued new service AS is triggered, 'S-CSCF2 sends an INVITE message to the AS new firing, the flow proceeds to step 325; if the routing address, S-CSCF2 remove the current message from the called party in a specific area of ​​the body addresses, for routing and addressing. FIG 3 (C) shows a circuit of the present invention the fixed network domain and the called user exhalation embodiment ^ IMS service does not enter the path of each process when the IMS domain. Incoming call a fixed network subscriber circuit domain, the incoming call requires a certain service provided by the IMS application control for the called user, and the first half of the call - i.e., outgoing signaling path and without IMS. It follows the flow shown in FIG. First, in step 331, the incoming call a fixed network subscriber circuit domain, PSTN IAM message is received, it is judged that the IMS service subscription, subscription information of the called user according to the combination of a specific IMS service according to the subscription information of the called user prefix in front of the business, and the service prefix code added to the IAM message parameter "called party number", and sends an IAM message to the MGCF. Proceeds to step 332, the MGCF receives the IAM message, the message in the "called number" for number analysis, it is determined that the called user according to their specific business subscribes to the IMS prefix

Traffic, the traffic translated into a prefix code corresponding to the PSI, and removes the prefix of the called user obtained real PSTN number. MGCF converts the IAM message translated into the INVITE message, the IMS standard defined by the PSI filled INVITE message, the called subscriber number PSTN message fill in other regions. The MGCF sends an INVITE message to S-CSCF2, S-CSCF2 MGCF obtained routing address method as defined in 3GPP IMS standards. Proceeds to step 333, S-CSCF2 receiving the INVITE message, determining whether PSI corresponding service subscription data exists, if It does not exist, then the request to the HSS download. According to the rules of the downloaded signed, triggering a IMSAS2. S-CSCF2 sends an INVITE message to AS2. Proceeds to step 334, the AS2 receives the INVITE message, the called party number extracted from the message in a particular area, and determines whether the corresponding service subscription PS1 data exists, if not, the request to the HSS to download. Downloaded subscription data indicates that the called service call is triggered, the AS2 corresponding to the called user service control processing is completed, transmits an INVITE message to S-CSCF2. Proceeds to step 335, S-CSCF2 receiving the INVITE message from the AS, continues for PSI addressing or routing service trigger, if it continues for new service AS is triggered, S-CSCF2 sends an INVITE message to the new triggered AS, process re-enters step 334; if the routing address, S-CSCF2 remove the current message from the called address in a specific area of ​​the body for routing and addressing. In one embodiment of the present invention, the user is judged by the PSTN IMS subscription characteristic and combined into one service prefix notification message through the MGCF, the MGCF service prefix translated PSI. In another embodiment of the present invention, PSTN is not determined, PSTN user calls unconditionally routed directly to the MGCF, the user authentication process provided for by the MGCF function call interception, if the user subscribes to an IMS service, to provide specific service subscription MGCF information. This authentication process, the MGCF determines if the called user subscribes to an IMS service, then the corresponding PSI composition according to the service subscription information directly; if no subscription the IMS service, the MGCF returns the call to the PSTN. In another embodiment of the present invention, the fixed network CS user can directly dial the called number dialing, PSTN service access code number of analysis IMS service access code, the call is routed to

MGCF, providing user authentication process by the MGCF function call interception, if the user subscribes to IMS services, MGCF provide specific service subscription information. This authentication process, the MGCF determines if the called user subscribes to an IMS service, then the corresponding PSI composition according to the service subscription information directly; if no IMS services subscription, MG (, F returns the call to the PSTN; present invention embodiment, PSTN calling user in the IMS determines that the subscriber network nodes may be caller's originating office or tandem office switch; the PSTN to the called user in the IMS determines that the subscriber may be a network node landing the called subscriber switch office or tandem office. in the embodiment, the configuration of a PSTN fixed network home location register (Home location register, referred to as "HLR") in another embodiment of the present invention, when the call passes HLR by the HLR determines that the call is IMS subscription service. in one embodiment of the present invention, S-CSCF, AS and other entities to download subscription information to the HSS inquiry method may be one of the following ways subscription, S-CSCF downloads the like on the obtained information is not stored, that is, after the release of the session is deleted, each call will re-download; subscription information or for permanent storage, that is, each call before the first check whether the local store signed letter If not before going to HSS download, remain stored after the session releasing the subscription information; or to use data aging mechanisms, will sign the information stored for some time, if the threshold is exceeded (eg more than 24 hours without relevant call), the entity deleted locally stored subscription data. Although embodiments of the present invention by reference to certain preferred, the invention has been illustrated and described, those of ordinary skill in the art should be understood that various may be made thereto in form and detail variety of changes, without departing from the spirit and scope of the appended claims the invention shall be defined.

Claims (28)

1. A method of providing service via a packet CS user domain method comprising the following steps, based on the media gateway control function determines the signaling path in internet protocol multimedia subsystem of the fixed network through a Media Gateway Control Function whether the CS user subscribes to an internet protocol multimedia subsystem service, and if necessary converting the signaling message and the message contents parameters, initiation protocol request message to the corresponding service call session control function sends the session; the serving call session control session initiation protocol response function from the media gateway control function request message, acquires the current session control after the service subscription information of the transaction, the message service request to the corresponding application server transmits a session initiation protocol; the application server in response to the service from session initiation protocol call session control function request message, acquires the current processing target domain service service control circuit after the user subscription information.

The method of providing service for the CS domain user packet domain according to claim 1, wherein the fixed network domain storing user related circuitry in a home multimedia subsystem user of the server based on the Internet Protocol subscription information for the other devices based query and download the Internet protocol multimedia subsystem in.

3. The method of providing services to users through packet domain CS domain according to claim 2, wherein said Session Initiation Protocol request message of the user domain using the telephone number of fixed circuit Session Initiation Protocol Uniform Resource Locator formats.

The method of providing service for the CS domain user packet domain according to claim 3, wherein, when said circuit domain with the carcasses of the calling subscriber, the method further comprises the step of, in accordance with the circuit domain network said circuit domain user subscription information to determine whether the subscription service based on the Internet protocol multimedia subsystem, and if the call control function is then routed to the media gateway, and indicates a circuit domain network via inter-exchange signaling the need Internet protocol multimedia subsystem users calling the service control; the media gateway control function determines that the user is a CS user and subscription services based on the Internet protocol multimedia subsystem according to the inter-exchange signaling circuit domain network, by querying electronic encoding server, the CS domain user number is converted into a session initiation protocol uniform resource Locator format, then the calling serving call session control function sends a session initiation protocol request message contains information indicating that the user is a subscription-based internet protocol multimedia subsystem circuit domain service user indication information, and With a session initiation protocol uniform resource locator format calling telephone number; the calling serving call session control function in response to a session initiation protocol media gateway control function from the request message, according to the indication information of which the user determines that the CS user and multimedia subsystem subscription service based on the internet protocol, after acquiring the user's service subscription information of the call session control of the user, and sends a session initiation protocol request message service corresponding application server through the home subscriber server query methods, wherein comprising means for indicating that the user is the user subscription information field indicating a circuit based on internet protocol multimedia subsystem service; the application server a session initiation protocol response from the serving call session control function request message, wherein the indication information is determined according to the user subscription CS user and an internet protocol multimedia subsystem service, access the user's service subscription information after the user's call service control through the home subscriber server query method, after processing, to the Calling serving call session control function returns a session initiation protocol request message; the calling serving call session control function after receiving the application server returns a session initiation protocol request message, processing continues domain user or the service triggering circuit routing session addressed.

5. The method of providing services to users through packet domain CS domain according to claim 3, wherein, when the CS domain user is a called user, and which has entered the outgoing signaling path based on the Internet Protocol when multimedia subsystem, the method further comprises the steps of, in the outgoing call signaling path, the calling party serving call session control function of the speed CS domain user routing address, by querying a server, the electronic coding circuit domain subscriber number is converted to a session initiation protocol uniform resource locator format, then the called serving call session control function and sends a routing request message to the session initiation protocol, using a session initiation protocol uniform resource locator format called number; the said called serving call session control function to obtain the circuit domain user subscription information query method home subscriber server, it transmits a session initiation protocol request message to the service server corresponding to the called application; application server of the called user via the home the method of obtaining subscription server queries the user circuit regions for Performs traffic control of the CS domain user, after processing control function to return the called serving call session a session initiation protocol request message; the called serving call session control function server returns a response to the application called Session Initiation Protocol request message, the user continues processing circuit domain service triggering based multimedia subsystem domain routing or internet protocol session; the called serving call session control function is triggered after processing operations and an internet protocol multimedia subsystem domain routing based , the user domain is called the current circuit route addressing circuit domain, the CS domain user number to recover from a session initiation protocol uniform resource Locator format of the original circuit domain format, and as the called number through the session initiation protocol request message to the egress gateway control function, the control function by the gateway routing calls to the outlet of the circuit domain network.

6. The method of providing service for the CS domain user packet domain according to claim 3, wherein said circuit is a user of the called user, and which does not enter the outgoing signaling path based on the Internet Protocol when multimedia subsystem, the method comprising the steps, it is determined whether the circuit domain network subscribes to the service based on the Internet protocol multimedia subsystem according to the user subscription information field circuit calls, and if so, the call to the routing media gateway control function, and a multimedia subsystem based on Internet protocol through a network inter-exchange signaling circuit domain service control required to provide an indication to the called user; media gateway control function by the fans according to the inter-office signaling circuit domain network CS user is determined and the user subscription service based on the internet protocol multimedia subsystem, the server electronically encoded by querying the CS domain user number is converted into a session initiation protocol uniform resource Locator format, and then to the corresponding called party serving call session control function sending a session initiation protocol request message system using session initiation protocol A called number format resource locator; the called serving call session control function in response to a session from a media gateway control function initiation protocol request message, acquires the home by using the method of the corpse server queries the user service subscription information the user's call session control protocol request message and initiates the appropriate service application server sends the session; the application server a session initiation protocol response from the called serving call session control function request message by the home subscriber server query method after obtaining the user's service subscription information of the user of the call control service, returns a session initiation protocol to the called serving call session control function request message after processing; the called serving call session control function in response to the called application server returns a session initiation protocol request message, the user continues processing circuit domain service triggering based multimedia subsystem domain routing or internet protocol session; the called serving call session control function based on service trigger and processed Internet After the proposed multimedia subsystem domain routing, user domain will be called the current circuit route addressing circuit domain, the CS domain user number to recover from a Session Initiation Protocol Uniform Resource Locator format of the original gamut format circuit, and its initiation protocol request message to the egress gateway control functions, breakout gateway control function by this route the call to the circuit domain network session as the called number is transmitted.

7. The method of 4 to 6 by the packet domain according to any of providing services to a user circuit domain claim, characterized in that the electronic coding of the storage management server a session initiation protocol uniform resource locator with the mutual inquiry service between the CS user number.

The method of claim 4 through the packet domain noted in claim 8 to provide service for the CS domain user, wherein the session initiation protocol request message, the "object" parameter "call information" header field extended definition, the calling user to indicate CS user and an internet protocol multimedia subsystem subscription-based service; calling the serving call session control function, the application server by a session initiation protocol of the received request message "object" parameter "call information" field of the header extension processing definition, the calling user determines to CS user and an internet protocol multimedia subsystem-based subscription service.

9. A method characterized in that it comprises a CS domain user number information in the subscription information, the called subscriber number is obtained by the CS domain of the subscription information, in multimedia subsystem domain processing is based on the Internet Protocol after addressing for routing traffic on the electrical network ^ of the domains.

10. A method of providing services to users through packet domain CS domain claims 4 to 6 according to any one of the preceding claims, characterized in that, in the home subscriber server subscription information stored in the user domain management circuit Correspondingly, the domain comprising the user's subscription information and routing circuit based internet protocol multimedia subsystem service information.

11. The method for providing service via a packet CS user domain according to claim 2, wherein said Session Initiation Protocol request message as the destination address by the Public Service Identity, and triggers based on Internet Protocol Multimedia Subsystem business.

12. The method for providing services for the CS domain user packet domain according to claim 11, wherein when the CS domain user calling subscriber, comprising the steps of a circuit domain network according to the circuit domain user subscribes to its subscription information services based on the Internet protocol multimedia subsystem, the control function routes the call to the media gateway, and the circuit domain network via inter-exchange signaling indicating the need of an Internet protocol-based multimedia sub the system provides the calling subscriber service control; the media gateway control function determines that the user is a CS user and subscription services based on the Internet protocol multimedia subsystem according to the inter-exchange signaling circuit domain network, and the corresponding information according to the subscription the public service identity, and then sent to the serving call session control function corresponding to a session initiation protocol request message, which contains the public service identity; the serving call session control function corresponding to the identifier obtained by the public service home subscriber server query method the subscription information corresponding to the service and then Initiation Protocol server for sending a session request message, which contains the Public Service Identity; the application server by the HSS inquiry method of the Public Service Identity corresponding to subscription information, a user of the circuit domain service control, to the serving call session control function returns after processing a session initiation protocol request message; after the serving call session control function request message in a session initiation protocol application server receives the returned, processing continues in route or service trigger site.

13. The method of providing services to users through packet domain CS domain according to claim 11, wherein, when the CS domain user is a called user, and which has entered the outgoing signaling path based on the Internet Protocol when multimedia subsystem, the method further comprises the steps of, in the outgoing call signaling path, the serving call session control function of said circuit domain user routing address, said routing to said outlet called gateway control function; the Breakout gateway control function is routed to the called media gateway control function; the media gateway control function according to service processing multimedia subsystem based on internet protocol flag determines whether or not the called service has been treated, If so, then the called route to the circuit domain network, or CS user is determined and the user subscription based internet protocol multimedia subsystem service, and to give the corresponding public service identity, according to the subscription information, then sends a corresponding service call session control function a session initiation protocol request message containing said common with Service identifier, while multimedia subsystem service processing flag is set based on the Internet Protocol of the user; the serving call session control function to obtain the corresponding Public Service Identity query method by the home subscriber server subscription information, and corresponding to the service the application server sends a session initiation protocol request message, which includes the public service identity; the application server by the HSS inquiry method of the public service identity corresponding to subscription information, a user of the circuit domain service control, after processing to the serving call session control function returns a session initiation protocol request message; a serving call session control function after receiving the application server returns a session initiation protocol message request, continue processing or routing service trigger addressing.

14. The method of providing services to users through packet domain CS domain according to claim 11, wherein the user is a called user circuit, and which does not enter the outgoing signaling path based on the Internet Protocol multimedia subsystem, comprising the steps, which determines the circuit domain network subscribes to the service based on the Internet protocol multimedia subsystem, the control function routes the call to the media gateway according to the user subscription information field circuit calls, and instructs the circuit domain network via inter-exchange signaling information; media gateway control function determines the user subscription CS user and an Internet protocol multimedia subsystem services in the circuit domain network according to the inter-office signaling, and according to the to give the corresponding subscription information of the public service identity, session initiation protocol request message transmitted to the corresponding serving call session control function, which includes the public service identity; the serving call session control function is obtained by the common home subscriber server query method the service subscription information corresponding to the identifier, and the service phase The application server sends a session initiation protocol request message, which includes the Public Service Identity; the application server by the HSS inquiry method of the Public Service Identity corresponding to subscription information, a user of the circuit domain service control, after processing to the serving call session control function returns a session initiation protocol request message; a serving call session control function after receiving the application server returns a session initiation protocol message request, continue processing or routing service trigger addressing.

Method 12-1 through packet domain according to any of claims 14 to provide 15. As noted in the circuit service domain user, wherein the session initiation protocol request message, the Public Service Identity as the destination address bearer identifier, a circuit domain of the called user carried by the subscriber number message body.

16. The method of one of the fields by providing a packet service to a user in the CS domain according to any of claims 12 to 14, wherein the serving call session control function, the application server receives the session initiation protocol request message to obtain the message body of the user in the circuit domain called subscriber number, for implementing the network routing address of the circuit domain based on the internet protocol multimedia subsystem domain of processed traffic; also used the application server service control.

17. The method of one of the fields by providing a packet service to a user in the CS domain according to any of claims 12 to 14, wherein the subscription information stored in the home subscriber server and managed by the Public Service Identity service Correspondingly, including the public service identity service subscription data, the public service identity of the calling or called service attributes; the application server according to the subscription data of the public service identity in the calling or called attributes, is determined CS user the calling user or the called circuit domain providing service control.

18. The method for providing service via a packet CS user domain according to claim 2, characterized in that, further comprising the step, all the circuit domain network will route the call to the media gateway control function; the media the gateway control function call interception, is determined by the user authentication process and the CS user subscription service based on the internet protocol multimedia subsystem, if it is an internet protocol multimedia subsystem session is triggered, otherwise return to the call said circuit domain network.

19. The method for providing service via a packet CS user domain according to claim 2, characterized in that, further comprising the step, the CS domain user directly dialing the called number dial the service access code, the the circuit domain network service access code analysis, and routing the call to the media gateway control function; the media gateway control function to intercept the call, is determined by the user authentication process and the CS user subscription based on the Internet protocol multimedia subsystem services, if the trigger is based on multi-^ Internet protocol? certain subsystems session, otherwise the call will return to the circuit domain network.

20. The method for providing services for a user domain through a circuit 18 or a packet domain according to claim 19, wherein, when the session initiation protocol request message passing user information field by the circuit Public Service Identity, after the media gateway control function determines that the CS user and user subscription-based internet protocol multimedia subsystem service, the user's subscription information according to the circuit domain service, to obtain the corresponding public service identity.

21. The method of providing services to a user via a circuit domain or packet domain 4 according to claim 12, characterized in that, in the circuit domain network, the user domain by the originating office switch or circuit tandem office switch determines the CS user subscribes to an internet protocol multimedia subsystem service; and when the session initiation protocol request message through a public service identifier information of the user domain transfer circuit, the originating office switch or a tandem office a specific combination of the switch according to the service prefix according to subscription information.

22. The method of providing services to a user via a circuit domain or packet domain 6 according to claim 14, characterized in that, in the circuit domain network, said circuit by a domain user or a tandem office floor office switch determines whether the switch said CS user subscribes to an internet protocol multimedia subsystem service; and when said session initiation protocol messaging requesting user domain information by the public service identity circuit, said floor office switch or a tandem office switch according to the service subscription information of a particular composition prefix.

23. A according to claim 4, or 6, or 12, or 14 by a packet domain according to any method for providing services for CS user, characterized in that the home location register arranged fixed in the circuit domain network, said circuit domain user call past the fixed network home location register, by determining whether the CS user subscribes to an internet protocol multimedia subsystem service; and when the session initiation protocol message request by the public service identity transmitting information to the user domain circuit, the fixed network home location register to the service subscription information according to a combination of a specific prefix.

24. The method as claimed in claim 4, or 6, or 12, or 14 through the packet domain according to a service provided to any user of CS domain, wherein the circuit domain network to the media gateway control function when the circuit domain network inter-exchange sends the initial address message signaling is integrated services digital network user part of the signaling, the "called party number" parameter of the initial address message from the circuit domain user called number add specific prefix code, it is used for indicating the CS domain user subscribes to the service based on the internet protocol multimedia subsystem of.

25. The method for providing service via a packet CS user domain according to claim 24, wherein the media gateway control function after receiving the initial address message, the specific prefix code number analysis to determine whether the CS user subscribes to an internet protocol multimedia subsystem service; and when the session initiation protocol message request through a common delivery service domain user identification information of the circuit, the specific prefix code is the electrical ^? domain user home network # 4 of each of the circuit domain based on an internet protocol multimedia subsystem service subscription information generated by combining the media gateway control function to obtain the public service identity translation according to the special prefix code .

26. The method for providing service via a packet CS user domain according to claim 24, wherein the media gateway control function after receiving the initial address message, according to the "Called Party Number" parameter , to obtain the CS domain user of the called number.

27. The method of providing services to a user via a circuit domain or packet domain 4 according to claim 6, wherein, when the media gateway control function to the serving call session control function routing, configuration data is set by obtaining the routing table serving call session control function 3 is also addressed by the respective i.

28.4 to 6, 12 to 14 by a packet domain according to any method of providing services to a user domain circuit according to claim, wherein the home subscriber server comprising the steps of query, the query launched by judging whether the information is to be queried locally, and if so, direct call local information otherwise the query to the home subscriber server and download the information to query; the query originator retains store query information, and aging updating; wherein the query originator is the serving call session control function, any one of the application server.