CN100479611C

CN100479611C - System, device and method for multi-medium domain simulating circuit domain service

Info

Publication number: CN100479611C
Application number: CNB2006100670935A
Authority: CN
Inventors: 李岩; 黄世碧; 毛凌志; 吴东君
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-04-04
Filing date: 2006-04-04
Publication date: 2009-04-15
Anticipated expiration: 2026-04-04
Also published as: CN1984374A

Abstract

The invention is used for solving the issue existed in the currently used net element and system architecture, which is the S_CSCF must provide circuit domain service for the IMS circuit domain emulation user so as to result the separation between the control and service incapable. The system thereof comprises: the relevant gateway in IMS, circuit domain terminal MS and radio access network (RAN), and an access gateway control function (AGCF) for controlling the access of said MS. It also comprises: emulation MSC server eMSC for making logical control for the MS circuit domain service, and connected to the CSCF in IMS through ISC interface.

Description

The system of multi-medium domain simulating circuit domain service, device and method

Technical field

The present invention relates to wireless communication field, particularly relate to multimedia domain, MMD (IMS) domain simulating circuit (CS) professional system, emulation Mobile Switching Center Server, access gateway control function entity and method.

Background technology

The carrying of next generation communication network has begun to use instead IP comprehensively.Development from communication network, no matter be CDMA or GSM/WCDMA, all experienced the IP packet network of separating from the legacy circuit-switched networks network to control carrying again to the such evolution process of the multi-media network of all-IP, the final goal in this evolution process is to provide professional by unified IMS network.But in the process of IMS evolution, still there is a large amount of non-IMS terminals,, still needs the circuit-domain network that upholds one's heritage in order to provide original circuit domain business to these non-IMS territory terminals, if two nets and depositing then are unfavorable for reducing the operational overhead of operator over a period to come.In order to address this problem, a kind of mechanism need be provided, replace the traditional circuit domain network to provide original circuit domain business by the IMS territory to conventional terminal, realize two net unifications, thereby reduce the operational overhead of operator, utilize this mechanism also can realize providing the business in IMS territory simultaneously, realize the increment of IMS territory business to conventional terminal.

In order to solve the problem of above-mentioned two net unifications, Lang Xun company has proposed a cover solution, and the relevant patent No. is 20030026245 (US).Referring to shown in Figure 1, this scheme is utilized unified IMS framework, provides professional to traditional circuit domain terminal and block terminal simultaneously.This scheme has been introduced an iMSC Server entity, and this entity has been realized the mutual mapping between A/Iu interface and the IMS territory sip message, and promptly this entity is linked into the IMS territory as the adaptive entity of access signaling with the traditional circuit domain terminal use.After the traditional circuit domain terminal use is registered to the IMS territory, by S_CSCF emulation VMSC/GMSC, for the circuit switch domain terminating end subscriber that inserts IMS provides the circuit domain artificial service, realized simultaneously and the traditional circuit domain network architecture between interoperability, solved the roaming problem of circuit domain emulation user in the IMS territory to other circuit-domain network.After other circuit-domain network user roamed into IMS circuit domain emulation territory, iMSC Server and S_CSCF co-simulation were finished the function of VMSC, provided the traditional circuit domain business to the user of other circuit-domain network.

The main points of this scheme comprise:

1, when IMS circuit domain emulation user does not roam, iMSCServer be responsible for wireless side interface signaling and IMS territory sip message mutual mapping and control media gateway, adaptive entity as access signaling is linked into the IMS territory to the traditional circuit domain terminal use, the S_CSCF in IMS territory preserves user's subscription data (obtaining from HSS during registration), realize professional control according to this subscription data, the circuit domain business that has been equivalent to by the S_CSCF The Realization of Simulation in IMS territory traditional circuit domain VMSC provides function.

2, roam into other circuit-domain network (as roaming into OtherCS network among Fig. 1) as IMS circuit domain emulation user, then MSC registers by the HSS of D interface to IMS circuit domain artificial network, when the user as called when being routed to IMS circuit domain artificial network, the S_CSCF of IMS circuit domain artificial network will simulate the GMSC function of traditional circuit domain, be that S_CSCF passes through R_SGW (Ms and Mh interface all use MAP) and obtains called positional information to HSS, be routed to the MSC at called place according to this information.

3, when other circuit-domain network user roams into IMS circuit domain artificial network, iMSCServer still carries out the registration in IMS territory, S_CSCF then obtains user contracting data and finishes the registration of traditional circuit domain to the HLR of other circuit-domain network by R_SGW, when the user of other circuit-domain network as called when being routed to GMSC, GMSC obtains called positional information by C interface to HLR, HLR gets roaming number according to log-on message to S_CSCF, S_CSCF returns temporary number, GMSC is routed to IMS circuit domain artificial network according to this temporary number, and it is professional that S_CSCF emulation roaming place VMSC provides.

The main points of analyzing such scheme as can be known, there is following shortcoming in this scheme:

1, S_CSCF realizes the emulation of VMSC business function in the prior art, on S_CSCF, provide circuit domain business for IMS circuit domain emulation user, run counter in the standard I MS framework professional and control is separated, S_CSCF does not do professional principle, need carry out a large amount of ability expansions to the S_CSCF entity function in the standard I MS framework.

2, the mutual function of HLR of S_CSCF domain simulating circuit VMSC realization and circuit-domain network in the prior art, cause the complicated of S_CSCF function, need only carry out a large amount of expansion work S_CSCF in the standard I MS framework as the ability of general service controlled function entity.

3, iMSCServer has only realized that the A/Iu interface shines upon to SIP, can't transmit the user side signaling fully, losing of user side signaling information causes IMS circuit domain artificial network to be difficult to realize having now all business of traditional circuit domain or be difficult to realize the professional identical business experience of existing traditional circuit domain.

Summary of the invention

The invention provides system, emulation Mobile Switching Center Server, access gateway control function entity and the method for multi-medium domain simulating circuit domain service, in order to solve Network Element Function and system architecture owing to prior art, make S_CSCF be necessary for IMS circuit domain emulation user circuit domain business is provided, cause controlling the problem that to separate with business.

Further solve the problem that prior art can't be transmitted the user side signaling fully.

System of the present invention comprises: the related network elements among the IMS, circuit domain terminal MS and wireless access network RAN, and mutual by A/Iu interface and RAN, to control the access gateway control function entity AGCF that described MS inserts RAN; Described system also comprises:

Emulation MSC server eMSC is used for the circuit domain business of described MS is carried out logic control, and is connected with call conversation control function entity CSCF among the described IMS by ISC interface; And described eMSC is encapsulated in isup message or A/Iu interface signaling information in the sip message.

Described AGCF also is used for A/Iu interface signaling information is encapsulated in sip message.Described eMSC also is used for the isup message and the A/Iu interface signaling information of the SIP encapsulation messages that will receive and translates mutually; The encapsulation sip message that carries A/Iu interface signaling information that described AGCF also is used for receiving translates to the A/Iu interface message.

Described A/Iu interface signaling information comprises: A/Iu interface message, perhaps one or more A/Iu interface message parameters unit.Described A/Iu interface signaling information is encapsulated in the sip message body.The encapsulation of described A/Iu interface signaling information realizes by the new media type of describing the sip message body.

Described eMSC is mutual by the attaching position register HLR of C/D interface and circuit domain, obtaining user's circuit domain business subscription data, and finishes registration and the authentication of described MS in view of the above.Described eMSC obtains user's roaming information by C interface, and simulates home MSC GMSC in view of the above, to realize called route.Described eMSC is also mutual by the billing function information unit of Ro/Rf interface and described IMS, to finish the transmission of service charging information.

Service call session control function entity S_CSCF among the described CSCF, query call conversation control function entity I-CSCF, MGCF entity MGCF, Border Gateway controlled function entity B GCF and ISC interface support have encapsulated the Session Initiation Protocol of isup message, described service call session control function entity S_CSCF, query call conversation control function entity I-CSCF, Proxy Call Session Control Function P-CSCF, and Gm and ISC interface support have encapsulated the Session Initiation Protocol of A/Iu interface signaling information.

Described AGCF also by the control IAD, is registered as IMS territory user with described MS; Be linked into CSCF among the IMS by Gm; By the control of agreement H.248 media gateway MGW; Be connected with other AGCF or moving exchanging center MSC by E interface, to realize the inter-office switchover of circuit domain.

Access gateway control function entity AGCF of the present invention comprises: the sip agent unit, and be used to act on behalf of MS and insert IMS, described AGCF also comprises:

Encapsulation unit is used for A/Iu interface signaling information is encapsulated in sip message;

Translate the unit, the encapsulation sip message that carries A/Iu interface signaling information that is used for receiving translates to the A/Iu interface message;

The Gm support of described AGCF has encapsulated the Session Initiation Protocol of A/Iu interface signaling information.

Emulation Mobile Switching Center Server of the present invention comprises: logic control element is used for the circuit domain business of MS is carried out logic control; ISC interface is used to be linked into IMS; Encapsulation unit is used for A/Iu interface signaling information is encapsulated in sip message.

Described server also comprises: translate the unit, the isup message and the A/Iu interface signaling information that are used for the SIP encapsulation messages that will receive are translated mutually.

Described ISC interface support has encapsulated the Session Initiation Protocol of A/Iu interface signaling information or has encapsulated the Session Initiation Protocol of isup message.

Described server also comprises: the C/D interface is used to obtain user's circuit domain business subscription data, and finishes registration and the authentication of MS in view of the above; And the roaming information that obtains the user, and simulate GMSC in view of the above, to realize called route.

The inventive method comprises the following steps:

A, finish the IMS circuit simulation territory registration of MS or nullify by eMSC;

B, when described MS relates to domain simulating circuit when professional, by eMSC this MS is carried out service logic and judges, and control the domain simulating circuit business of this MS according to judged result.

Described eMSC translates isup message in the SIP encapsulation messages of receiving and A/Iu interface signaling information mutually; And the isup message after will translating or A/Iu interface signaling information is encapsulated in the sip message again, and sends.

If described MS is an IMS circuit simulation intra domain user, then steps A comprises the following steps:

A11, described MS initiate the position and upgrade, and are registered to the IMS territory;

A12, eMSC HSS or the HLR in IMS circuit simulation territory initiates register requirement;

A13, eMSC receive message according to the registration that HSS or HLR return, and finish the registration of this MS in IMS circuit simulation territory.

Wherein, described steps A 11 comprises that following concrete steps: S_CSCF initiates the third-party registration request message according to filtering rule to eMSC, comprise the PU that generates according to user IMSI in the header field of this message, comprise the wireless side position updating request parameter of encapsulation in the message body of this message.Described steps A 12 comprises that following concrete steps: eMSC initiates register requirement according to the HSS or the HLR of IMSI in IMS circuit simulation territory; After HSS or HLR receive this request, the eMSC address of recording user registration.Described steps A 13 comprises that following concrete steps: HSS or HLR return registration and receive message, comprises user's MDN and user signing contract information in this message; EMSC is saved in VLR with described user's MDN and user signing contract information; EMSC returns the third-party registration success to S_CSCF.

If described MS is other circuit-domain network user, and roam in the IMS circuit simulation territory, then steps A comprises the following steps:

A21, described MS initiate position updating request;

A22, IMS circuit simulation territory dynamically generate the user data of this MS;

A23, finish authentication and the registration of this MS in the IMS territory;

A24, eMSC finish the authentication of this MS in other circuit domain according to the third-party registration request message that S_CSCF sends;

A25, eMSC initiate register requirement to the HLR of other circuit domain, and receive message according to the registration that HLR returns, and finish the registration of this MS in IMS circuit simulation territory.

Wherein, described steps A 22 comprises that following concrete steps: AGCF is according to the IMSI in the position updating request, generate the private user identity sign and the interim public user identity sign in IMS territory, and with the relevant header field of these sign structure login request message, wireless side position updating request parameter is encapsulated in the login request message body, afterwards login request message is sent to I-CSCF; I-CSCF is identified to HSS inquiring user login state according to user's private user identity sign and interim public user identity; HSS dynamically generates the user data of this MS according to the roaming agreement that pre-establishes; HSS returns the capability set of S_CSCF according to described user data to I-CSCF; I-CSCF selects a S_CSCF, and transmits described login request message to it.Described steps A 23 comprises following concrete steps: described S_CSCF takes the family authorization data to HSS, and HSS returns this user and do not need authentication; S_CSCF takes user data to HSS, and HSS returns the user data of dynamic generation; S_CSCF returns to AGCF and succeeds in registration.Described steps A 24 comprises that following concrete steps: S_CSCF initiates the third-party registration request message according to filtering rule to eMSC, comprise the PU that generates according to user IMSI in the header field of this message, comprise the location update request message or the parameter of encapsulation in the message body of this message; EMSC initiates the authentication of circuit domain according to the wireless side position updating request parameter that comprises in IMSI and the message body.Described steps A 25 comprises following concrete steps: after the authentication success, eMSC initiates register requirement according to IMSI to the HLR of other circuit-domain network, after HLR receives this request, and the eMSC address of recording user registration; HLR returns registration and receives message, comprises user's MDN and user signing contract information; EMSC is saved in VLR with user's MDN and user signing contract information; EMSC returns the third-party registration success to S_CSCF.

If described MS is in IMS circuit simulation territory, and as Calling Side, then step B comprises the following steps:

B11, AGCF send the conversation request message that carries the wireless side interface parameters by S_CSCF to eMSC;

B12, eMSC carry out service logic according to described conversation request message and judge;

B13, eMSC control the call proceeding of this MS according to judged result.

Wherein, described step B11 comprises that following concrete steps: AGCF calls for the IMSI Query Database of asking in the message according to the beginning, to obtain user's IMS territory common identity sign; AGCF generates conversation request message according to described sign, and the wireless side interface parameters is encapsulated in the message body of described conversation request message; AGCF mails to S_CSCF with described conversation request message; S_CSCF mails to eMSC according to triggering rule with this conversation request message.Described step B12 comprises: eMSC is according to the signatory situation of user's circuit domain business, and user's current state, and the wireless side interface parameters that encapsulates in the message body of conversation request message are carried out service logic and judged.Described step B13 comprises that following concrete steps: eMSC removes the wireless side interface parameters that encapsulates in the message body of conversation request message, and re-constructs conversation request message; The conversation request message that re-constructs is forwarded to S_CSCF; S_CSCF mails to callee side with this conversation request message, to finish call proceeding.

If described MS is an IMS circuit simulation intra domain user, and as callee side, then step B comprises the following steps:

After B21, conversation request message were routed to eMSC, eMSC carried out service logic according to described conversation request message and judges;

B22, eMSC add the A/Iu interface parameters of encapsulation according to judged result in the message body of described conversation request message, and send to AGCF by S_CSCF;

B23, AGCF obtain the required parameter of paging from the message body of the conversation request message received, and by wireless access network paging called MS.

Wherein, described step B21 comprises: eMSC resolves described conversation request message, carries out the service logic judgement according to signatory situation of called subscriber's circuit domain business and the current state of called subscriber.Described step B22 comprises following concrete steps: eMSC according to judged result, adds the A/Iu interface parameters of encapsulation in the message body of described conversation request message; EMSC sends to S_CSCF according to the S_CSCF address of when registration record with this conversation request message; S_CSCF is forwarded to AGCF with this conversation request message.

Also comprise before the described step B21: eMSC distributes the public service identity PSI in an IMS territory or distributes tel URI that a called subscriber registers in the IMS territory as roaming number, so that described conversation request message is routed to eMSC for the called subscriber for the called subscriber.

If IMS circuit simulation intra domain user roams into other circuit-domain network, and finish registration in this circuit-domain network, and as callee side, Calling Side is IMS territory user, then step B comprises the following steps:

After B31, conversation request message were routed to eMSC, eMSC carried out service logic according to described conversation request message and judges;

B32, eMSC obtain called positional information according to judged result to HLR;

B33, eMSC replace the called party address of conversation request message with the positional information that HLR returns, and the conversation request message after replacing are mail to S_CSCF, to finish call proceeding.

If the terminal use A in the IMS circuit simulation territory initiates supplementary service, then step B comprises the following steps:

B41, user A have set up session, and user A sends supplementary signal message by RAN;

After B42, eMSC receive this supplementary signal message, according to the current sessions state, and information that comprises in the supplementary signal message and the signatory situation of user, carry out the processing of supplementary service.

Wherein, described step B42 comprises following at least a measure, to carry out the processing of supplementary service: and the attribute of Media Stream in the change current sessions, comprising the direction and the annexation of Media Stream; Set up new session branch; Mutual by S_CSCF and MRF, on MRF, set up media resource, and the Media Stream in the change current sessions is connected to the media resource that MRF sets up;

If the MS user in the IMS circuit simulation territory initiates authentication in business is carried out, then step B comprises the following steps:

B51, AGCF send authentication request message by S_CSCF to eMSC, comprise relevant authorization data;

B52, eMSC carry out authentication process;

B53, eMSC return authentication request response message to AGCF, comprise the authentication process result.

Wherein, described step B52 comprises the following steps: that eMSC sends authentication request to HLR; HLR returns Authentication Response, and eMSC carries out authentication process according to Authentication Response.

If the Authentication Response indication that described HLR returns carries out that authentication is synchronous, then step B52 comprises following concrete steps: eMSC sends Indication message to AGCF, and is synchronous with the indication authentication; After AGCF receives described Indication message, send the authorization data synchronization request message by RAN to MS user, wherein comprising needs synchronous authorization data; After MS user receives the authorization data synchronization request message, send checking network requests message, wherein comprise the random number of a checking network; AGCF is encapsulated into this random number in the Indication message body, perhaps is mapped in the header field of Indication message, mails to eMSC; EMSC and HLR generate the checking result according to random number alternately, and return to AGCF; AGCF returns to MS with the network verification result; After MS verified this result, the synchronizing authentication data were returned the authorization data synchronized result; EMSC carries out subsequent treatment according to this authorization data synchronized result.

Perhaps, if network authentication is carried out in the Authentication Response that described HLR returns indication, then step B52 comprises following concrete steps: eMSC sends Indication message to AGCF, wherein comprises a random number, with the indication network authentication; AGCF sends authentication request message by RAN to MS after receiving described Indication message, wherein comprises random number; MS generates authenticating result and returns eMSC according to this random number; EMSC carries out subsequent treatment according to authenticating result.

Beneficial effect of the present invention is as follows:

System of the present invention a kind of system of multi-medium domain simulating circuit domain service, comprising emulation MSC server eMSC of the present invention, the circuit domain business that this eMSC has MS carries out function of logic, and is connected with CSCF among the IMS by ISC interface.

So just realize with the emulation of VMSC business function with for IMS circuit domain emulation user provides circuit domain business to move among the described eMSC, so just need not expand the function of S_CSCF, realize the emulation of VMSC business function, also need not on S_CSCF, provide circuit domain business for IMS circuit domain emulation user.Thereby inherited the professional advantage that is separated with control in the standard I MS framework, and S_CSCF does not do professional principle.

So just that domain simulating circuit VMSC and circuit domain HLR is mutual function has been moved among the described eMSC and has been realized, so just need not expand the function of S_CSCF, makes the HLR of S_CSCF domain simulating circuit VMSC and circuit domain mutual.Thereby satisfied S_CSCF in the standard I MS framework only as the requirement of general service controlled function entity.

Further, eMSC of the present invention and other related network elements also are used for isup message or A/Iu interface signaling information are encapsulated in sip message, and described AGCF also is used for A/Iu interface signaling information is encapsulated in sip message; And isup message and A/Iu interface signaling information that eMSC also is used for the SIP encapsulation messages that will receive translates mutually, and the encapsulation sip message that carries A/Iu interface signaling information that described AGCF also is used for receiving translates to the A/Iu interface message.So when the A/Iu interface message can't be mapped to sip message, can adopt encapsulation and the mode of translating to finish the transmission of user side signaling, with all user side signalings of complete compatibility.Thereby avoided losing of user side signaling information to cause IMS circuit domain artificial network to be difficult to realize having now all business of traditional circuit domain or be difficult to realize the professional identical business experience of existing traditional circuit domain.

The present invention also uses the method that said system and device provide a kind of multi-medium domain simulating circuit domain service, and relevant concrete business realizing.

Description of drawings

Fig. 1 is the system construction drawing of existing multi-medium domain simulating circuit domain service;

Fig. 2 is the system construction drawing of multi-medium domain simulating circuit domain service of the present invention;

Fig. 3 is the inventive method flow chart of steps;

Fig. 4 is a method example one: the register flow path figure of IMS circuit simulation intra domain user;

Fig. 5 is a method example two: IMS circuit simulation intra domain user is as the flow chart of Calling Side;

Fig. 6 is a method example three: other circuit domain user is caller, and IMS circuit simulation intra domain user is the flow chart of called implementation one;

Fig. 7 is a method example three: other circuit domain user is caller, and IMS circuit simulation intra domain user is the flow chart of called implementation two;

Fig. 8 is a method example four: IMS territory user is as Calling Side, and IMS circuit simulation intra domain user is as the flow chart of callee side;

Fig. 9 is a method example five: IMS circuit simulation intra domain user is initiated the flow chart of Three-Way Calling;

Figure 10 is a method example six: IMS circuit simulation intra domain user is at the ongoing authorizing procedure figure of business;

Figure 11 is a method example seven: IMS circuit simulation intra domain user roams into the register flow path figure after other circuit domain;

Figure 12 is a method example ten: IMS circuit simulation intra domain user roams into after other circuit domain as called, and IMS territory user is the flow chart of caller;

Figure 13 is a method example 11: other circuit domain user roams into the register flow path figure behind the IMS circuit simulation territory;

Figure 14 is a method example 14: other circuit domain user roams into behind the IMS circuit simulation territory as called, and IMS territory user is the flow chart of caller.

Embodiment

In order to inherit the professional advantage that is separated with control in the standard I MS framework, and S_CSCF does not do business, only as the principle of general service controlled function entity, the invention provides a kind of system of multi-medium domain simulating circuit domain service, referring to shown in Figure 2, it comprises: the related network elements among the IMS, circuit domain terminal MS and wireless access network RAN; Mutual by A/Iu interface and RAN, to control the access gateway control function entity AGCF that described MS inserts RAN; And the eMSC (being apparatus of the present invention) that is connected with CSCF among the described IMS by ISC interface.Below each network element is described one by one.

One: described AGCF be this programme perfect prior art iMSC Server (for the difference for the purpose of, this programme is called AGCF) entity.It has increased encapsulation unit, is used for A/Iu interface signaling information is encapsulated in sip message, so that the A/Iu interface signaling is delivered to eMSC fully, resolves its content to realize the emulation of circuit domain business by eMSC; Also increased and translated the unit, the encapsulation sip message that carries A/Iu interface signaling information that is used for receiving translates to the A/Iu interface message.

Described AGCF provides but is not limited to following concrete function.

AGCF has prior art iMSC Server function:

X-1, have SIP UA function, promptly AGCF interconnects with CSCF by Gm, inserts the IMS network and finishes the sip user agent function.

X-2, finish MGCF alternately with MGW, promptly finish MGW Media Stream establishment of connection, keep, control operation such as removing by agreement H.248.

X-3, for simplifying reciprocal process, for inserting the user, AGCF do not provide media resource control by IMS MRFC, AGCF itself can be and inserts the user media resource controlled function is provided, by H.248, SPI agreement or self-defined internal agreement etc. provide the control for media resource (as signal tone etc.).

X-4, can generate according to traditional circuit domain terminal use's IMSI and enter the necessary private user identity in IMS territory (Private User Identity), public user identity (Public User Identity).

X-5, has the mobile management function.AGCF is mutual by A/Iu interface and RAN, thereby finish controlled function to the traditional circuit domain terminal, promptly can handle the traditional circuit domain terminal use with RAN that AGCF is connected in roaming and switching flow, start that can process user, shutdown, flow processs such as periodic location registration.

X-6, can handle legacy user's switching flow by E interface, promptly AGCF connects with other AGCF or MSC by E interface, finishes the customer service handoff functionality.

The off-line of X-7, support and Charging Functions/online charging interface, the Rf/Ro interface is described the associated description referring to IMS.

The present invention increases following concrete function characteristic on AGCF:

Interface between F-1, AGCF and the CSCF: the Gm reference point is based on Session Initiation Protocol; Be that the Session Initiation Protocol that encapsulated the A/Iu interface message is (during as the special business information of needs carrying A/Iu interface in some cases, limited by Session Initiation Protocol, can not be shone upon fully, therefore adopt packaged type, A/Iu interface message or A/Iu interface message unit package are transmitted in the sip message body).

Annotate: prior art adopts the mode of mapping.

F-2, the A/Iu interface protocol is translated function with the signaling of Session Initiation Protocol: at the A/Iu interface, on the basis of Session Initiation Protocol intercommunication mapping techniques, some information in the A/Iu interface protocol is (as the air interface attribute priority, traditional circuit domain terminal positional information etc.) in the time of can not in Session Initiation Protocol, be shone upon fully, can in the sip message body, encapsulate A/Iu interface message or A/Iu interface message unit, (is SIP-A hereinafter to be referred as the Session Initiation Protocol after this expansion), realize RAN in this way, AGCF is with the transmission of A/Iu interface message between the eMSC, thus emulation traditional circuit domain business.SIP-A is the function expansion of Session Initiation Protocol, and extended method is as follows:

With A/Iu interface message or A/Iu interface message unit package in the sip message body, for the new medium type (Media Type) of such sip message body definition, realize the definition format example as:

A). be used for transmitting the medium type of A/Iu interface message:

Media?type?name：application

Media?subtype?name：RAN-Message

Required?parameters：Version

Optional?parameters：base

Encoding?scheme：binary

B). be used for transmitting the medium type of A/Iu information unit:

Media?type?name：application

Media?subtype?name：RAN-IE

Required?parameters：Version

Optional?parameters：base

Encoding?scheme：binary

Wherein, parameters " version " the A/Iu interface message of expression different tissues issue is as 3GPP, 3GPP2 etc., parameters " base " is the protocol version of expression definition A/Iu interface message then, as Ios40, and IoS41 etc.RAN message wherein is meant and comprises message name and message body part in the message definition in the form at least.

AGCF of the present invention has removed the following concrete function of iMSC Server in the prior art:

AGCF is no longer mutual with traditional circuit domain HLR, and promptly AGCF does not have the function of VLR.

Two: described eMSC is used for the circuit domain business of described MS is carried out logic control for the newly-increased entity of the present invention.The i.e. VMSC/GMSC function of this entity emulation traditional circuit domain network, and utilize the professional trigger mechanism in IMS territory, handle all circuit domain business as AS.Because all circuit domain business are all realized at eMSC, business and separating of controlling have been realized.Further also can comprise: encapsulation unit and translate the unit, finish A/Iu interface signaling transmission of Information to cooperate above-mentioned AGCF.Described encapsulation unit is used for isup message or A/Iu interface signaling information are encapsulated in sip message; Translate the unit, the isup message and the A/Iu interface signaling information that are used for the SIP encapsulation messages that will receive are translated mutually.

EMSC includes but not limited to following concrete function:

1, the interface between eMSC and the S-CSCF: the ISC reference point is based on Session Initiation Protocol, being SIP-A agreement (promptly having encapsulated the Session Initiation Protocol of A/Iu interface message, information unit) in some cases, is SIP_I agreement (being used for the intercommunication with other circuit domain legacy user) in some cases.

2, eMSC has the logic control ability of traditional circuit domain business simulating.

3, after eMSC handled professional control, the related service information of transmitting in sip message if desired still can not be shone upon in Session Initiation Protocol fully, and then eMSC can generate SIP-A, also can generate SIP-I message.

4, eMSC supports the translate function of SIP-A to the SIP-I signaling.

5, eMSC by and HLR between the C/D interface can finish the registration of traditional circuit domain, flow processs such as called routing iinformation are provided, eMSC can download the user contracting data of traditional circuit domain to finish the logic control of traditional circuit domain business simulating from this interface simultaneously.

6, eMSC has the function of GMSC, can by and HLR between C interface obtain called routing iinformation.

7, eMSC finishes the transmission of service charging information with adopting the Ro/Rf interface between the billing function information unit, and the Ro/Rf interface function is with the Ro/Rf interface function of IMS definition.

Three, described MS is the traditional circuit domain terminal, links to each other with wireless access network by air interface.

Four, RAN is a wireless access network, is responsible for the wireless side function treatment, and provide and core net between signaling and bearing interface, this interface can be carried on the TDM, also can be carried on IP or the ATM.

Five, S-CSCF, I-CSCF support the transmission in the IMS territory of SIP-A and SIP-I message among Fig. 2 on the basis of IMS standard definition.

Six, MGCF among Fig. 2, BGCF support the transmission of SIP-I message in the IMS territory on the basis of IMS standard definition.

Seven, P-CSCF supports the transmission of SIP-A message in the IMS territory among Fig. 2 on the basis of IMS standard definition.

Eight, HSS is on the basis of IMS standard definition among Fig. 2, and the user data of supporting other circuit domain user to roam into behind the IMS territory dynamically generates.

Nine, complete identical with existing IMS territory and traditional circuit domain standard definition of other network entity and relevant interface among Fig. 2.

Use said system and device, the invention provides a kind of method of multi-medium domain simulating circuit domain service,, comprise following key step referring to shown in Figure 3:

S1, finish the IMS circuit simulation territory registration of MS or nullify by eMSC.

After MS becomes IMS circuit simulation territory user, or other circuit domain user is when roaming into IMS circuit simulation territory, and eMSC finishes the registration in IMS circuit simulation territory for this MS; When the MS that has registered in IMS circuit simulation territory roams into other circuit domain, eMSC finishes the cancellation in IMS circuit simulation territory for this MS.

S2, described MS relate to the domain simulating circuit business.

Comprise: the business of IMS circuit simulation intra domain user, IMS circuit simulation intra domain user roams into the business after other circuit domain, and perhaps the user of other circuit-domain network roams into the business behind the IMS circuit simulation territory.

S3, by eMSC this MS is carried out service logic and judge.

EMSC carries out service logic to this MS and judges, relates to which the concrete business that comprises among the step S2 to determine this MS.

S4, control the domain simulating circuit business of this MS according to judged result.

Because all circuit domain business are all realized at eMSC, so eMSC can control the domain simulating circuit business of this MS according to judged result.

Below specifically describe the inventive method by 14 examples.

Method example one: the registration of IMS circuit simulation intra domain user.Referring to shown in Figure 4, comprise following concrete steps:

1, IMS circuit simulation intra domain user is initiated the position updating request of circuit domain by wireless access network.

2, because HSS has user's related data, so can traditional terminal user be registered to the IMS territory according to the mode of IMS territory terminal.

3, AGCF upgrades to traditional circuit domain terminal home position by wireless access network and receives.

Annotate: this step also can be finished authentication (can comprise integrity protection) the back execution of circuit domain at AGCF.

4, S_CSCF initiates third-party registration according to filtering rule to eMSC, comprise the user in the To header field according to the PU that IMSI generates, comprise the wireless side position updating request parameter (this parameter when the 2nd step, send registration message obtain) of encapsulation in its message body from AGCF.

Annotate: need to revise S_CSCF and when third-party registration, carry message body.

5, eMSC initiates the authorizing procedure of traditional circuit domain according to the wireless side position updating request parameter that comprises in IMSI and the message body.

Annotate 1: if step 2 has been finished user's authentication, then this step can be omitted.

Annotate 2: authorizing procedure can be referring to the authorizing procedure in the business procedure.

6, after the success of traditional circuit domain authentication, AGCF upgrades to traditional circuit domain terminal home position by wireless access network and receives.

7, eMSC initiates register requirement according to the HSS/HLR of IMSI in IMS circuit simulation territory, after HSS/HLR receives this request, and the eMSC address of recording user registration.

8, HSS/HLR returns registration and receives message, comprises user's MDN and user signing contract information (PROFILE), and eMSC is saved in VLR with these information.

9, eMSC returns the third-party registration success to S_CSCF.

10, eMSC obtains user's other public user identity sign in the IMS territory to S_CSCF booking reader's status message.

HSS in the notes 1:IMS circuit simulation territory can close with HLR and establish also and can separate.

The user who annotates in the 2:IMS circuit simulation territory can have other public user identity sign (by the registration hiding mode, registering other common identity sign).

Annotate 3: for simplified flow chart, AGCF and P_CSCF unification in this flow process, actual these two entities can separate.

Method example two: IMS circuit simulation intra domain user is as Calling Side.Referring to shown in Figure 5, comprise following concrete steps:

1, the traditional circuit domain terminal is initiated to begin to call for to ask, and AGCF finishes the wireless side resource assignation according to the business option that the beginning is called in asking, and this moment, AGCF also can carry out the caller authorizing procedure, referring to the flow chart of subsequent instance.

2, AGCF calls for the IMS territory common identity sign that the IMSI inquiry internal database of asking in the message obtains the user according to the beginning, generate the REQUEST_URI of conversation request message according to this sign, the wireless side interface parameters is encapsulated in the message body of conversation request message, this conversation request message is mail to S_CSCF.

S_CSCF mails to eMSC according to triggering rule with this conversation request message.

3, eMSC is according to the signatory situation (obtaining from HLR during registration) of user's circuit domain business, the wireless side parameter that encapsulates in the state that the user is current and the message body of conversation request message, carrying out service logic judges, can carry out intelligent trigger, call blocking, processing such as MPTY, this example assumes is carried out normal calling procedure, then eMSC re-constructs conversation request message, removes the wireless side interface parameters that encapsulates in the message body, and the session request is forwarded to S_CSCF.

Annotate 1: this conversation request promptly can be sip message, also can be SIP-I message.

4, S_CSCF mails to callee side according to the called route flow process of IMS territory definition with the session request.

5, callee side returns 183 message to S_CSCF, comprises the SDP of callee side.

Annotate: this 183 message promptly can be sip message, also can be SIP-I message.

6, S_CSCF mails to eMSC with 183 message.

7, after eMSC receives this message, upgrade user's session status, re-construct this message after, be forwarded to AGCF, after AGCF received this message, the SDP according to callee side carried operation.

8, callee side returns 180 message to S_CSCF, the indication called terminal ringing.

Annotate: this 180 message promptly can be sip message, also can be SIP-I message.

9, S_CSCF mails to eMSC with 180 message.

10, after MSC receives this message, upgrade user's session status, re-construct this message after, be forwarded to AGCF, after AGCF receives this message, carry operation accordingly, as the calling subscriber is put ring-back tone.

11, callee side returns 200OK message to S_CSCF, the indication called party answer.

Annotate: this 200OK message promptly can be sip message, also can be SIP-I message.

12, S_CSCF mails to eMSC with 200OK message.

13, after MSC receives this message, upgrade user's session status, re-construct this message after, be forwarded to AGCF, AGCF carries operation after receiving this message.

Method example three: the user is as Calling Side for other circuit-domain network, and IMS circuit simulation intra domain user is as callee side.This example has comprised two kinds of implementations again, and wherein implementation one, referring to shown in Figure 6, comprises following concrete steps:

1, other circuit-domain network user use the traditional circuit domain terminal use MDN as called number, call out be routed to GMSC after, GMSC obtains called address information to HLR.

Roaming number was got to eMSC in the address of the eMSC of record when 2, HLR Rigen was according to registration.

3, the roaming number of eMSC distributing user and return to HLR, this roaming number is a public service identity (PSI) in the IMS territory.

4, HLR returns to GMSC to this roaming number.

5, GMSC routes the call to MGCF according to this roaming number.

6, MGCF as tel URI, sends to this conversation request message the I_CSCF of tel URI ownership with this roaming number.

Annotate: this conversation request message promptly can be sip message, also can be SIP-I message.

7, the address of I_CSCF S_CSCF under called to HSS inquiry, because this roaming number is being a public service identity in the IMS territory, HSS can return the address of eMSC.

8, I_CSCF is routed to eMSC with the session request message.

9, eMSC resolves this conversation request message, carry out the service logic judgement according to signatory situation (obtaining from HLR during registration) of user's circuit domain business and the current state of user, can carry out such as preceding commentaries on classics, intelligent trigger, Call Waiting, processing such as call denial, this example assumes is carried out called normally, the S_CSCF address of record when then eMSC is according to registration, the session request message is sent to S_CSCF, in the message body of conversation request message, comprise the A/Iu interface parameters of encapsulation, be used for called paging assignment procedure, this moment, the REQUEST_URI of conversation request message was the common identity sign of called subscriber in the registration of IMS territory, should be SIP_A message.

S_CSCF is forwarded to AGCF with this conversation request message.

10, AGCF obtains corresponding IMSI according to the REQUEST_URI of conversation request message, obtains the required parameter of paging in the message body of conversation request message, by the wireless access network calling user.

11, because the paging time may be longer, AGCF returns ALERTING message earlier, the playback of indication Calling Side.

12, after eMSC receives this message, upgrade user's session status, re-construct this message after, transmit to Calling Side.This ALERTING message promptly can be sip message, also can be SIP-I message.

13, MGCF returns ACM to Calling Side, and optionally MGCF can be sidelong TIB tone in band to caller.

14, wireless access network returns page response, and this moment, AGCF can carry out called authorizing procedure, referring to the flow chart of subsequent instance.

15, AGCF carries out the wireless side resource assignation according to the parameter in the message body of conversation request message.

16, wireless access network returns the assignment success.

17, AGCF returns 183 message to Calling Side, and the inside comprises called SDP message, connects net operation according to the Calling Side SDP in the conversation request message simultaneously.

18, after eMSC receives this message, upgrade user's session status, re-construct this message after, transmit to Calling Side.This 183 message promptly can be sip message, also can be SIP-I message.

19, MGCF returns CPG to Calling Side, connects net operation according to the callee side SDP in 183 message simultaneously.

20, the traditional circuit domain terminal use returns called party answer message.

21, AGCF returns 200OK message to Calling Side.

22, after eMSC receives this message, upgrade user's session status, re-construct this message after, transmit to Calling Side.This response message promptly can be sip message, also can be SIP-I message.

23, MGCF returns ANM to Calling Side, the indication called party answer.

Wherein implementation two, referring to shown in Figure 7, comprise following concrete steps:

3, the roaming number of eMSC distributing user and return to HLR, this roaming number are the tel URI of user in the registration of IMS territory.

Annotate: eMSC obtains the log-on message of user in the IMS territory by the subscribing mechanism in IMS territory, referring to the register flow path of flow process one.

4, HLR returns to GMSC to this roaming number.

5, GMSC routes the call to MGCF according to this roaming number.

6, MGCF as tel URI, sends to this conversation request message the I_CSCF of tel URI ownership to this roaming number.

7, the address of I_CSCF S_CSCF under called to HSS inquiry, because this roaming number is being a registered common identity sign sign in the IMS territory, HSS can return the address of the S_CSCF of user's registration.

8, I_CSCF is routed to S_CSCF with the session request message.

9, S_CSCF is triggered to eMSC according to filtering rule with the session request message.

10, eMSC resolves this conversation request message, carry out the service logic judgement according to signatory situation (obtaining from HLR during registration) of user's circuit domain business and the current state of user, can carry out such as preceding commentaries on classics, intelligent trigger, Call Waiting, processing such as call denial, this example assumes is carried out called normally, then eMSC re-constructs conversation request message and sends to S_CSCF, the A/Iu interface parameters that in the message body of conversation request message, comprises encapsulation, be used for called paging assignment procedure, this conversation request message is a SIP_A message.S_CSCF is forwarded to AGCF with this conversation request message.

11, AGCF obtains corresponding IMSI according to the REQUEST_URI of conversation request message, obtains the required parameter of paging in the message body of conversation request message, by the wireless access network calling user.

12, because the paging time may be longer, AGCF returns ALERTING message earlier, the playback of indication Calling Side.

13, after eMSC receives this message, upgrade user's session status, re-construct this message after, transmit to Calling Side by S_CSCF.This ALERTING message promptly can be sip message, also can be SIP-I message.

14, MGCF returns ACM to Calling Side, and optionally MGCF can be sidelong TIB tone in band to caller.

15, wireless access network returns page response, and this moment, AGCF can carry out called authorizing procedure, referring to subsequent flow.

16, AGCF carries out the wireless side resource assignation according to the parameter in the message body of conversation request message.

17, wireless access network returns the assignment success.

18, AGCF returns 183 message to Calling Side, and the inside comprises called SDP message, connects net operation according to the Calling Side SDP in the conversation request message simultaneously.

19, after eMSC receives this message, upgrade user's session status, re-construct this message after, transmit to Calling Side by S_CSCF.This 183 message promptly can be sip message, also can be SIP-I message.

20, MGCF returns CPG to Calling Side, connects net operation according to the callee side SDP in 183 message simultaneously.

21, the traditional circuit domain terminal use returns called party answer message.

22, AGCF returns 200OK message to Calling Side.

23, after eMSC receives this message, upgrade user's session status, re-construct this message after, transmit to Calling Side by S_CSCF.This response message promptly can be sip message, also can be SIP-I message.

24, MGCF returns ANM to Calling Side, the indication called party answer.

Method example four: IMS territory user is as Calling Side, and IMS circuit simulation intra domain user is as callee side.Referring to shown in Figure 8, comprise following concrete steps:

1, IMS territory user as REQUEST_URL, routes the call to the I_CSCF of this common identity sign home network with the common identity sign of traditional circuit domain terminal use registration.

2, the address of I_CSCF S_CSCF under called to HSS inquiry, because this common identity sign is registered, HSS returns this user's of registration S_CSCF address.

3, I_CSCF is forwarded to S_CSCF with the session request message.

4, S_CSCF is forwarded to eMSC according to triggering rule with the session request message.

5, eMSC carries out the service logic judgement according to signatory situation (obtaining from HLR during registration) of user's circuit domain business and the current state of user, can carry out such as preceding commentaries on classics, intelligent trigger, Call Waiting, processing such as call denial, this example assumes is carried out called normally, then eMSC comprises the A interface parameters of encapsulation in the message body of conversation request message, be used for called paging assignment procedure, this conversation request message is transmitted to S_CSCF, S_CSCF is forwarded to AGCF with this conversation request message.

Follow-up flow process is with embodiment 3.

Method example five: IMS circuit simulation intra domain user is initiated Three-Way Calling.Referring to shown in Figure 9, comprise following concrete steps:

1, traditional circuit domain terminal use A sets up session with terminal B according to the calling procedure or the called flow of front, and traditional circuit domain terminal use A sends supplementary signal message by RAN, keeps the opposite end.

2, AGCF is the INFO of Session Initiation Protocol with this message maps, mails to eMSC through S_CSCF.

3, eMSC judges this INFO for keeping opposite end message according to session status, and the call hold service if the user has contracted then sends session updates message to AGCF, and indicating terminal user A can only send Media Stream.

4, after AGCF receives this session updates message, carry operation, the direction of Media Stream is only changed into and can send, return 200OK message after the carrying operation is finished according to indication.

5, after eMSC receives 200OK message, send session updates message to opposite end B, indicating terminal user A is current can only to send Media Stream.

6, after terminal B receives this message, carry out corresponding operating (as the Media Stream direction of upgrading B for only receiving) after, return 200OK message, enter the state of A maintenance B this moment.

7, the traditional circuit domain terminal use sends supplementary signal message by RAN, prepares to set up second calling branch.

8, AGCF is the INFO of Session Initiation Protocol with this message maps, comprises third party's number, mails to eMSC through S_CSCF.

9, eMSC judges that according to session status this INFO is for initiating third party call message, the third-party call business if the user has contracted, then according to the third party's number in the INFO, in end-to-end agency's mode,, wherein carry the medium stream information of A to the third party C message that initiates a session request.

10, third party C returns called terminal ringing message, wherein comprises the medium stream information of C.

11, after eMSC receives this ALERTING message, then send session updates message to AGCF, comprise the medium stream information of C, indicating terminal user A sets up and is connected with the Media Stream of C, and its direction is for receiving.

12, after AGCF receives this session updates message, carry operation, set up A and be connected, return 200OK message after the carrying operation is finished with the Media Stream of C according to indication.

13, third party C returns called party answer message.

14, after eMSC receives this response message, then send session updates message to AGCF, the Media Stream direction of indication AGCF change terminal use A is two-way.

15, after AGCF receives this session updates message, carry operation according to indication, the direction of the Media Stream of change terminal use A is two-way, returns 200OK message after the carrying operation is finished, and enters A, C talking state this moment.

16, the traditional circuit domain terminal use sends supplementary signal message by RAN, prepares to enter the Three-Way Calling state.

17, AGCF is the INFO of Session Initiation Protocol with this message maps, mails to eMSC through S_CSCF.

18, eMSC is according to session status, judge that this INFO is for entering meeting message, then send conversation request message (eMSC has directly sent to MRS in for reduced graph) through S_SCCF to MRS, conferencing resource is set up in request, comprises the medium stream information of terminal B in the message.

19, after MRS received this conversation request message, establishment conferencing resource and foundation were connected with Media Stream B's, return 200OK message, comprise conferencing resource information.

20, after eMSC receives this response message, send session updates message to opposite end B, comprise conferencing resource information, indication opposite end B sets up and is connected with the Media Stream of conferencing resource.

21, after opposite end B receives this session updates message, set up being connected of Media Stream and conferencing resource, return 200OK message.

22, after eMSC receives this 200OK message, send session updates message to MRS, indication MRS sets up being connected of conferencing resource and Media Stream C.

23, after MRS receives this session updates message, set up being connected of conferencing resource and Media Stream C, return 200OK message.

24, after eMSC receives this response message, send session updates message to opposite end C, comprise conferencing resource information, indication opposite end C sets up and is connected with the Media Stream of conferencing resource.

25, after opposite end C receives this session updates message, set up being connected of Media Stream and conferencing resource, return 200OK message.

26, after eMSC receives this 200OK message, send session updates message to MRS, indication MRS sets up being connected of conferencing resource and Media Stream A.

27, after MRS receives this session updates message, set up being connected of conferencing resource and Media Stream A, return 200OK message.

28, after eMSC receives this 200OK message, send session updates message to AGCF, indication AGCF sets up being connected of Media Stream A and conferencing resource.

29, after AGCF receives this session updates message, set up A and be connected, return 200OK message after the carrying operation is finished, enter the Three-Way Calling state this moment with the Media Stream of conferencing resource.

Annotate: this example has only been introduced Three-Way Calling, keeps for calling out, and calls out call recovery, Multi-Party Conference, and supplementary services such as calling transfer can realize with similar mechanism.

Method example six: IMS circuit simulation intra domain user is in the ongoing authentication of business.Referring to shown in Figure 10, comprise following concrete steps:

1, the initial service request of traditional circuit domain terminal use initiation (comprises and begins to exhale service request, the called paging response, last short-message sending etc.) comprise authorization data in, AGCF is encapsulated into Message or Info message body (perhaps being mapped to the header field of message) lining to authorization data, mail to eMSC, its REQUEST_URI is the common identity sign (if the roamer of other circuit-domain network, its common identity sign by IMSI generated) of user in the registration of IMS territory.

2, eMSC initiates authentication request according to IMSI to the HLR of its ownership according to the IMSI that REQUEST_URI gets access to the user.

3, HLR returns Authentication Response.

4, eMSC carries out subsequent operation according to authentication response message, if 200OK message is then directly returned in the authentication success, carries out follow-up business by AGCF and handles; If authentication is unsuccessful, then subsequent operation is carried out in indication according to authentication, if indication failed authentication then return 401 message, if the indication authorization data synchronously or network authentication then send message message, would comprise follow-up authentication operations indication.

5, after AGCF receives message message, synchronous if indication network need carry out authorization data, then send the authorization data synchronization request message to the traditional circuit domain terminal use by RAN, the inside comprises needs synchronous authorization data.

6, after the traditional circuit domain terminal use receives the authorization data synchronization request message, send checking network requests message, the inside comprises the random number of a checking network.

7, AGCF is encapsulated into Message message body (perhaps being mapped to the header field of message) lining to this random number, mails to eMSC.

8, eMSC initiates checking to the HLR of user attaching.

9, HLR returns checking result (the inside comprises the checking result according to random number and the generation of subscription authentication data).

10, eMSC returns 200OK message to AGCF, comprises the checking result.

11, AGCF sends network verification response message as a result by RAN to the traditional circuit domain terminal use, the inside checking result.

12, the traditional circuit domain terminal use is network trusted according to verifying that the result judges, then upgrades authorization data, returns the synchronous success message of authorization data.

13, AGCF returns 200OK message to eMSC.

14, emsc sends message message, and network authentication is carried out in indication, comprises a random number;

Annotate:, then can skip the 5-13 step if the authentication in the message in the 4th step is designated as network authentication rather than synchronizing authentication data.

15, AGCF sends the network authentication request message by RAN to the traditional circuit domain terminal use.

16, the traditional circuit domain terminal is returned the network authentication response message, comprises the checking result.

17, AGCF is encapsulated into this checking result in the 200OK message, mails to eMSC.

18, eMSC compares checking result in the Message message and the 3rd step from the checking result that HLR obtains, and sends the authentication status report message to HLR, and the inside comprises comparative result.

19, HLR returns authentication status report response message.

20, eMSC reports response message according to authentication status, returns the response message of step 1 to AGCF, and 200OK message is then returned in the success of this example assumes network authentication.AGCF carries out the processing of subsequent flows journey after receiving 200OK message.

Method example seven: IMS circuit simulation intra domain user roams into the registration after other circuit-domain network.Referring to shown in Figure 11, comprise following concrete steps:

1, after IMS circuit simulation intra domain user roams into other circuit-domain network, initiates the position updating request of circuit domain by wireless access network.

2, MSC initiates the register and authentication flow process of traditional circuit domain according to the HSS/HLR of IMSI in IMS circuit simulation territory.

3, MSC upgrades successfully to the wireless access network home position.

4, the HSS/HLR in the IMS circuit simulation territory initiates the registration cancellation to original this user's of registration eMSC.

5, after eMSC receives registration cancellation flow process, return registration and cancel successfully, if IMS circuit simulation intra domain user, then the mark User Status is other circuit-domain network registration; Optionally eMSC can delete the user contracting data of original download.

Method example eight: after IMS circuit simulation intra domain user roams into other circuit-domain network, as Calling Side.

Because after IMS circuit simulation intra domain user roams into other circuit-domain network, the MSC of other circuit-domain network HSS/HLR in the IMS circuit simulation territory has downloaded user contracting data, its flow process is identical with the calling procedure of present traditional circuit domain network, is not giving unnecessary details.

Method example nine: after IMS circuit simulation intra domain user roams into other circuit-domain network, as callee side; The user is as Calling Side for other circuit-domain network.

When other circuit-domain network customer call roams into the IMS circuit simulation intra domain user of other circuit-domain network, the MSC of other circuit-domain network can distribute roaming number, therefore calling can be routed directly to the MSC at called place, and can not be routed to the IMS territory, its flow process is the called flow of traditional circuit domain network, is not giving unnecessary details here.

Method example ten: after IMS circuit simulation intra domain user roams into other circuit-domain network, as callee side; IMS territory user is as Calling Side.Referring to shown in Figure 12, comprise following concrete steps:

1, IMS territory user as REQUEST_URL, routes the call to the I_CSCF of this common identity sign home network with traditional circuit domain terminal use's IMS territory common identity sign.

2, the address of I_CSCF S_CSCF under called to HSS inquiry, HSS returns the capabilities list of a S_CSCF address or S_CSCF.

Annotate:, be in unregistered state (perhaps still being in login state in a short time) because may be asynchronous with the registration that roams into other circuit-domain network in the registration releasing in IMS territory at IMS territory network because this moment, the user roamed into other circuit-domain network.If login state, then directly return the address of original this user's of registration S_CSCF, otherwise having unregistered service according to the user, handles HSS, return original this user's of registration the address of S_CSCF or the capabilities list of a S_CSCF.

3, I_CSCF is forwarded to S_CSCF according to S_CSCF address of returning or the capabilities list (gravity treatment S_CSCF) of S_CSCF with the session request message.

5, eMSC judges that the user has roamed into other network (the registration cancellation according to embodiment 3 is learnt), then obtains called positional information to HLR.

Annotate: obtain traditional circuit domain terminal use's IMS territory common identity sign when eMSC receives conversation request message,, obtain user's MDN according to this sign inquiry inside or external data base.

Roaming number was got to MSC in the address of the MSC of record when 6, HLR Rigen was according to registration.

7, the roaming number of MSC distributing user and return to HLR.

8, HLR returns to eMSC to this roaming number.

9, eMSC re-constructs conversation request message according to the TLDN that returns, and with the REQUEST_URL of TLDN as new conversation request message, other parts can remain unchanged, and this conversation request message is mail to S_CSCF.S_CSCF judges that this TLDN is other circuit-domain network number, is routed to MGCF with this session.

10, MGCF routes the call to the MSC at called place according to TLDN.

11, MSC returns called terminal ringing message.

12, MGCF becomes 180 message of Session Initiation Protocol after S_CSCF mails to eMSC the called terminal ringing message maps.

13, after eMSC re-constructs 180 message, mail to S_CSCF.

14, S_CSCF mails to Calling Side with this message.

15, MSC returns called party answer message.

16, MGCF becomes the 200OK message of Session Initiation Protocol after S_CSCF mails to eMSC the called party answer message maps.

17, after eMSC re-constructs 200OK message, mail to S_CSCF.

18, S_CSCF mails to Calling Side with this message.

Annotate: supplementary service flow process after the user roams away and professional ongoing authorizing procedure are by the MSC realization of ground, visit ground, and be consistent with traditional circuit domain network implementation, do not giving unnecessary details here.

Method example 11: the user of other circuit-domain network roams into the registration behind the IMS circuit simulation territory.Referring to shown in Figure 13, comprise following concrete steps:

1, after other circuit-domain network user roams into IMS circuit simulation territory network, initiates the position updating request of circuit domain by wireless access network.

2, AGCF identifies according to the private user identity sign and the interim public user identity in the IMSI generation IMS territory of position updating request, and location update request message or parameter are encapsulated in the REGISTER message body, and this message is mail to I_CSCF.

3, I-CSCF is identified to HSS inquiring user login state according to user's private user identity sign and interim public user identity.Because this user is other circuit-domain network user, so HSS user data of no use needs dynamically to generate other circuit-domain network user's data according to the roaming agreement that pre-establishes, these data comprise other circuit-domain network user's filtering rule at least.HSS finally returns the capability set of S_CSCF to I-CSCF.

Annotate: HSS needs increased functionality to generate dynamic subscriber's data.

4, I_CSCF selects a S_CSCF according to the capability set that returns, and transmits the REGISTER request to this S_CSCF.

5, S_CSCF takes the family authorization data to HSS, because this user is other circuit-domain network user, HSS returns this user and do not need authentication.

Annotate: HSS need revise to return the user and not need authentication.

6, because the user does not need authentication, S_CSCF continues to take user data to HSS, and HSS returns the user data of dynamic generation, and these data comprise filtering rule.

Annotate: S_CSCF need revise the situation that process user does not need authentication.

7, S_CSCF returns to AGCF and succeeds in registration.

8, AGCF upgrades to traditional circuit domain terminal home position by wireless access network and receives.

Annotate: this step also can be received that the circuit domain of eMSC succeeds in registration at AGCF and send after the message again.

9, S_CSCF initiates third-party registration according to user's filtering rule to eMSC, comprises the user in the To header field according to the PU that IMSI generates, and comprises the location update request message or the parameter of encapsulation in its message body.

10, eMSC initiates authorizing procedure according to the position updating request parameter that comprises in IMSI and the message body to the HLR of other circuit-domain network.

Annotate: if authentication is not passed through, eMSC can return registration failure to S_CSCF, initiates the network registry flow process by S_CSCF.

11, after the authentication success, eMSC initiates register requirement according to IMSI to the HLR of other circuit-domain network, after HLR receives this request, and the eMSC address of recording user registration.

12, HLR returns registration and receives message, comprises user's MDN and user signing contract information (PROFILE), and eMSC is saved in VLR with these information.

13, eMSC returns the third-party registration success to S_CSCF.

14, eMSC by S_CSCF to the AGCF transtation mission circuit territory message that succeeds in registration.

15, AGCF returns response message.

16, AGCF upgrades to traditional circuit domain terminal home position by wireless access network and receives.

Annotate: 14-16 is optional flow process.

Annotate 1: other circuit-domain network user only has the interim public user identity sign that IMSI generates, and this sign only is used for the addressing of inside, IMS territory, is sightless for the user.

Method example 12: after the user of other circuit-domain network roams into IMS circuit simulation territory, as Calling Side.

Because when other circuit-domain network user registers, user's subscription data downloads to eMSC from the HLR of other circuit-domain network, and its flow process is identical with the calling procedure (with embodiment 2) of IMS circuit simulation intra domain user, repeats no more.

Method example 13: after the user of other circuit-domain network roams into IMS circuit simulation territory, as callee side; The user is as Calling Side for other circuit-domain network.

For other circuit-domain network user who roams in the IMS emulation territory, eMSC can distribute a roaming number equally, to call out through MGCF, I_SCCF is routed to eMSC, because eMSC has downloaded user signing contract information from the HLR of other circuit-domain network, so can carry out the called service logic determines, the called flow of its flow process IMS circuit simulation intra domain user is identical (with embodiment 3), repeats no more.

Method example 14: after the user of other circuit-domain network roams into IMS circuit simulation territory, as callee side; IMS territory user is as Calling Side.Referring to shown in Figure 14, comprise following concrete steps:

1, IMS territory user as REQUEST_URL, routes the call to the S_CSCF of IMS territory user attaching network with other circuit-domain network user's MDN.

Annotate: for roaming into local other circuit-domain network user, because the IMS territory does not have relevant user data, all do not have the visible public user identity sign of user.

2, S_CSCF inquiry enum server is judged the user of this MDN for other circuit-domain network, routes the call to BGCF.

3, BGCF carries out the called number analysis, routes the call to MGCF.

4, MGCF carries out the called number analysis, routes the call to the GMSC of circuit domain.

5, GMSC obtains called address information to the HLR of other circuit-domain network.

Roaming number was got to eMSC in the address of the eMSC of record when 6, the HLR of other circuit-domain network was according to registration.

7, the roaming number of eMSC distributing user and return to HLR, this roaming number is the tel URI (referring to called subscriber's flow scheme 1 in the IMS emulation territory and scheme 2) of a public service identity (PSI) or his network users registration hiding in the IMS territory.

8, HLR returns to GMSC to this roaming number.

9, follow-up flow process repeats no more here with embodiment 3 (from step 5).

Annotate: the flow process for the supplementary service of other circuit domain user that roams into IMS circuit simulation territory and professional ongoing authorizing procedure and IMS circuit simulation intra domain user is consistent, is not giving unnecessary details here.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1, a kind of system of multi-medium domain simulating circuit domain service, comprise: the related network elements among the IMS, circuit domain terminal MS and wireless access network RAN, and it is mutual by A/Iu interface and RAN, to control the access gateway control function entity AGCF that described MS inserts RAN, it is characterized in that described system also comprises:

2, the system as claimed in claim 1 is characterized in that, described AGCF also is used for A/Iu interface signaling information is encapsulated in sip message.

3, the system as claimed in claim 1 is characterized in that, described eMSC also is used for the isup message and the A/Iu interface signaling information of the SIP encapsulation messages that will receive and translates mutually; The encapsulation sip message that carries A/Iu interface signaling information that described AGCF also is used for receiving translates to the A/Iu interface message.

As claim 2 or 3 described systems, it is characterized in that 4, described A/Iu interface signaling information comprises: A/Iu interface message, perhaps one or more A/Iu interface message parameters unit.

5, system as claimed in claim 4 is characterized in that, described A/Iu interface signaling information is encapsulated in the sip message body.

6, system as claimed in claim 5 is characterized in that, the encapsulation of described A/Iu interface signaling information realizes by the new media type of describing the sip message body.

7, the system as claimed in claim 1 is characterized in that, described eMSC is mutual by the attaching position register HLR of C/D interface and circuit domain, obtaining user's circuit domain business subscription data, and finishes registration and the authentication of described MS in view of the above.

8, system as claimed in claim 7 is characterized in that, described eMSC obtains user's roaming information by C interface, and simulates home MSC GMSC in view of the above, to realize called route.

9, the system as claimed in claim 1, it is characterized in that, service call session control function entity S_CSCF among the described CSCF, query call conversation control function entity I-CSCF, MGCF entity MGCF, Border Gateway controlled function entity B GCF and ISC interface support have encapsulated the Session Initiation Protocol of isup message, described service call session control function entity S_CSCF, query call conversation control function entity I-CSCF, Proxy Call Session Control Function P-CSCF, and Gm and ISC interface support have encapsulated the Session Initiation Protocol of A/Iu interface signaling information.

10, the system as claimed in claim 1 is characterized in that, described AGCF also by the control IAD, is registered as IMS territory user with described MS; Be linked into CSCF among the IMS by Gm; By the control of agreement H.248 media gateway MGW; Be connected with other AGCF or moving exchanging center MSC by E interface, to realize the inter-office switchover of circuit domain.

11, system as claimed in claim 8 is characterized in that, described eMSC is also mutual by the billing function information unit of Ro/Rf interface and described IMS, to finish the transmission of service charging information.

12, a kind of access gateway control function entity AGCF comprises: the sip agent unit, and be used to act on behalf of MS and insert IMS, it is characterized in that described AGCF also comprises:

13, a kind of emulation Mobile Switching Center Server is characterized in that, comprising:

Logic control element is used for the circuit domain business of MS is carried out logic control;

ISC interface is used to be linked into IMS;

Encapsulation unit is used for A/Iu interface signaling information is encapsulated in sip message.

14, emulation Mobile Switching Center Server as claimed in claim 13 is characterized in that, described server also comprises:

Translate the unit, the isup message and the A/Iu interface signaling information that are used for the SIP encapsulation messages that will receive are translated mutually.

15, emulation Mobile Switching Center Server as claimed in claim 14 is characterized in that, described ISC interface support has encapsulated the Session Initiation Protocol of A/Iu interface signaling information or encapsulated the Session Initiation Protocol of isup message.

16, emulation Mobile Switching Center Server as claimed in claim 13 is characterized in that, described server also comprises:

The C/D interface is used to obtain user's circuit domain business subscription data, and finishes registration and the authentication of MS in view of the above; And the roaming information that obtains the user, and simulate GMSC in view of the above, to realize called route.

17, a kind of method of multi-medium domain simulating circuit domain service is characterized in that, comprises the following steps:

18, method as claimed in claim 17 is characterized in that, described eMSC translates isup message in the SIP encapsulation messages of receiving and A/Iu interface signaling information mutually; And the isup message after will translating or A/Iu interface signaling information is encapsulated in the sip message again, and sends.

19, method as claimed in claim 18 is characterized in that, if described MS is an IMS circuit simulation intra domain user, then steps A comprises the following steps:

20, method as claimed in claim 19 is characterized in that, described steps A 11 comprises following concrete steps:

-S_CSCF initiates the third-party registration request message according to filtering rule to eMSC, comprises the PU that generates according to user IMSI in the header field of this message, comprises the wireless side position updating request parameter of encapsulation in the message body of this message.

21, method as claimed in claim 20 is characterized in that, described steps A 12 comprises following concrete steps:

-eMSC initiates register requirement according to the HSS or the HLR of IMSI in IMS circuit simulation territory;

After-HSS or HLR receive this request, the eMSC address of recording user registration.

22, method as claimed in claim 21 is characterized in that, described steps A 13 comprises following concrete steps:

-HSS or HLR return registration and receive message, comprise user's MDN and user signing contract information in this message;

-eMSC is saved in VLR with described user's MDN and user signing contract information;

-eMSC returns the third-party registration success to S_CSCF.

23, method as claimed in claim 20 is characterized in that, also comprises in the described steps A 11: eMSC finishes the authentication of this MS in circuit domain according to the third-party registration request message that S_CSCF sends.

24, method as claimed in claim 23 is characterized in that, described authentication comprises following concrete steps:

-eMSC initiates the authentication of circuit domain according to the wireless side position updating request parameter that comprises in IMSI and the message body;

-after the success of circuit domain authentication, AGCF upgrades to the MS home position by wireless access network and receives.

25, method as claimed in claim 18 is characterized in that, if described MS is other circuit-domain network user, and roams in the IMS circuit simulation territory, and then steps A comprises the following steps:

A21, described MS initiate position updating request;

26, method as claimed in claim 25 is characterized in that, described steps A 22 comprises following concrete steps:

-AGCF is according to the IMSI in the position updating request, generate the private user identity sign and the interim public user identity sign in IMS territory, and with the relevant header field of these sign structure login request message, wireless side position updating request parameter is encapsulated in the login request message body, afterwards login request message is sent to I-CSCF;

-I-CSCF is identified to HSS inquiring user login state according to user's private user identity sign and interim public user identity;

-HSS dynamically generates the user data of this MS according to the roaming agreement that pre-establishes;

-HSS returns the capability set of S_CSCF according to described user data to I-CSCF;

-I-CSCF selects a S_CSCF, and transmits described login request message to it.

27, method as claimed in claim 26 is characterized in that, described steps A 23 comprises following concrete steps:

-described S_CSCF takes the family authorization data to HSS, and HSS returns this user and do not need authentication;

-S_CSCF takes user data to HSS, and HSS returns the user data of dynamic generation;

-S_CSCF returns to AGCF and succeeds in registration.

28, method as claimed in claim 27 is characterized in that, described S_CSCF to AGCF return succeed in registration after, AGCF upgrade to receive to the MS home position by wireless access network.

29, method as claimed in claim 27 is characterized in that, described steps A 24 comprises following concrete steps:

-S_CSCF initiates the third-party registration request message according to filtering rule to eMSC, comprises the PU that generates according to user IMSI in the header field of this message, comprises the location update request message or the parameter of encapsulation in the message body of this message;

-eMSC initiates the authentication of circuit domain according to the wireless side position updating request parameter that comprises in IMSI and the message body.

30, method as claimed in claim 29 is characterized in that, described steps A 25 comprises following concrete steps:

After the success of-authentication, eMSC initiates register requirement according to IMSI to the HLR of other circuit-domain network, after HLR receives this request, and the eMSC address of recording user registration;

-HLR returns registration and receives message, comprises user's MDN and user signing contract information;

-eMSC is saved in VLR with user's MDN and user signing contract information;

-eMSC returns the third-party registration success to S_CSCF.

31, method as claimed in claim 18 is characterized in that, if described MS is in IMS circuit simulation territory, and as Calling Side, then step B comprises the following steps:

B13, eMSC control the call proceeding of this MS according to judged result.

32, method as claimed in claim 31 is characterized in that, described step B11 comprises following concrete steps:

-AGCF calls for the IMSI Query Database of asking in the message according to the beginning, to obtain user's IMS territory common identity sign;

-AGCF generates conversation request message according to described sign, and the wireless side interface parameters is encapsulated in the message body of described conversation request message;

-AGCF mails to S_CSCF with described conversation request message;

-S_CSCF mails to eMSC according to triggering rule with this conversation request message.

33, method as claimed in claim 32 is characterized in that, described step B12 comprises:

EMSC is according to the signatory situation of user's circuit domain business, and user's current state, and the wireless side interface parameters that encapsulates in the message body of conversation request message are carried out service logic and judged.

34, method as claimed in claim 33 is characterized in that, described step B13 comprises following concrete steps:

-eMSC removes the wireless side interface parameters that encapsulates in the message body of conversation request message, and re-constructs conversation request message;

-conversation request message that re-constructs is forwarded to S_CSCF;

-S_CSCF mails to callee side with this conversation request message, to finish call proceeding.

35, method as claimed in claim 34 is characterized in that, carries ISUP information in the conversation request message that described eMSC re-constructs.

36, method as claimed in claim 18 is characterized in that, if described MS is an IMS circuit simulation intra domain user, and as callee side, then step B comprises the following steps:

37, method as claimed in claim 36 is characterized in that, described step B21 comprises:

EMSC resolves described conversation request message, carries out the service logic judgement according to signatory situation of called subscriber's circuit domain business and the current state of called subscriber.

38, method as claimed in claim 37 is characterized in that, described step B22 comprises following concrete steps:

-eMSC adds the A/Iu interface parameters of encapsulation according to judged result in the message body of described conversation request message;

-eMSC sends to S_CSCF according to the S_CSCF address of when registration record with this conversation request message;

-S_CSCF is forwarded to AGCF with this conversation request message.

39, as claim 36,37 or 38 described methods, it is characterized in that, also comprise before the described step B21:

EMSC for the called subscriber distribute an IMS territory public service identity PSI or for the called subscriber distribute a called subscriber at the tel URI of IMS territory registration as roaming number, so that described conversation request message is routed to eMSC.

As claim 36,37 or 38 described methods, it is characterized in that 40, Calling Side is other circuit-domain network user, perhaps Calling Side is IMS territory user.

41, method as claimed in claim 18 is characterized in that, if IMS circuit simulation intra domain user roams into other circuit-domain network, and finish registration in this circuit-domain network, and as callee side, Calling Side is IMS territory user, and then step B comprises the following steps:

42, method as claimed in claim 18 is characterized in that, if the terminal use A in the IMS circuit simulation territory initiates supplementary service, then step B comprises the following steps:

43, method as claimed in claim 42 is characterized in that, described step B42 comprises following at least a measure, to carry out the processing of supplementary service:

The attribute of Media Stream in the-change current sessions is comprising the direction and the annexation of Media Stream;

-set up new session branch;

-mutual by S_CSCF and MRF, on MRF, set up media resource, and the Media Stream in the change current sessions is connected to the media resource that MRF sets up.

44, method as claimed in claim 18 is characterized in that, if the MS user in the IMS circuit simulation territory initiates authentication in business is carried out, then step B comprises the following steps:

B52, eMSC carry out authentication process;

45, method as claimed in claim 44 is characterized in that, described step B52 comprises the following steps:

-eMSC sends authentication request to HLR;

-HLR returns Authentication Response, and eMSC carries out authentication process according to Authentication Response.

46, method as claimed in claim 45 is characterized in that, synchronous if authentication is carried out in the Authentication Response indication that described HLR returns, then step B52 comprises following concrete steps:

-eMSC sends Indication message to AGCF, and is synchronous with the indication authentication;

After-AGCF receives described Indication message, send the authorization data synchronization request message by RAN to MS user, wherein comprising needs synchronous authorization data;

After-MS user receives the authorization data synchronization request message, send checking network requests message, wherein comprise the random number of a checking network;

-AGCF is encapsulated into this random number in the Indication message body, perhaps is mapped in the header field of Indication message, mails to eMSC;

-eMSC and HLR generate the checking result according to random number alternately, and return to AGCF;

-AGCF returns to MS with the network verification result;

After-MS verified this result, the synchronizing authentication data were returned the authorization data synchronized result;

-eMSC carries out subsequent treatment according to this authorization data synchronized result.

47, method as claimed in claim 45 is characterized in that, if network authentication is carried out in the Authentication Response that described HLR returns indication, then step B52 comprises following concrete steps:

-eMSC sends Indication message to AGCF, wherein comprises a random number, with the indication network authentication;

-AGCF sends authentication request message by RAN to MS after receiving described Indication message, wherein comprises random number;

-MS generates authenticating result and returns eMSC according to this random number;

-eMSC carries out subsequent treatment according to authenticating result.