CN101146325B - Method and system for circuit domain network to get IMS domain user information - Google Patents

Method and system for circuit domain network to get IMS domain user information Download PDF

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Publication number
CN101146325B
CN101146325B CN200610127417XA CN200610127417A CN101146325B CN 101146325 B CN101146325 B CN 101146325B CN 200610127417X A CN200610127417X A CN 200610127417XA CN 200610127417 A CN200610127417 A CN 200610127417A CN 101146325 B CN101146325 B CN 101146325B
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user
ssf
scp
ims territory
information
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CN101146325A (en
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李岩
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2007/070642 priority patent/WO2008040205A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0029—Provisions for intelligent networking
    • H04Q3/0045—Provisions for intelligent networking involving hybrid, i.e. a mixture of public and private, or multi-vendor systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks

Abstract

The invention discloses a method and system for the conventional circuit field network to acquire user information in the field of IP multi-media subsystem. The method includes: IP multi-media subsystem exchange function entity IM-SSF acquires IP multi-media subsystem IMS field user roaming information; IP multi-media subsystem exchange functional entity provides acquired IMS field user roaming information to the intelligent service control functional entity SCP in the CDMA network. The system of invention includes: IP multi-media subsystem exchange functional entity IM-SSF and the intelligent service control functional entity SCP in the CDMA network; the IP multi-media subsystem exchange functional entity IM-SSF includes: IMS field user roaming information acquisition unit and IMS field user roaming information providing unit. The invention enables the SCP in the CDMA network to perceive the roaming characteristics of users in the IMS field, thus providing desirable intelligent services to users in the IMS field.

Description

The method and system of circuit domain network to get IMS domain user information
Technical field
The present invention relates to communication technical field, be specifically related to a kind of method and system of circuit domain network to get IMS domain user information.
Background technology
For can be fast, convenient, flexibly, economical, generate and realize various new business effectively, in traditional circuit domain, introduced the intelligent network framework, wherein fixed network has defined Intelligent Network Application Protocol INAP, GSM/WCDMA (global mobile communication/Wideband Code Division Multiple Access (WCDMA)) system is for realizing IN service, introduced CAMEL (mobile network strengthens the logical client application), CDMA mobile communication system has defined a series of WIN (wireless intelligent network) agreement.More than these intelligent network frameworks all be based on traditional circuit domain.
Fig. 1 is the intelligent network framework of CDMA traditional circuit domain, comprising:
SCP (service control point) 12; HLR (attaching position register) 14; BSC (base station controller) 11; MSC/SSF/VLR (mobile services switching centre/Service Switching Function/VLR Visitor Location Register) the 13rd, the core switching device of cdma system, it mainly acts on is to provide function of exchange and mobile management for the mobile subscriber, under the intelligent network framework, MSC also has Service Switching Function, can be according to the user intelligent service subscription data that obtains from HLR, call event is triggered to SCP, and finishes intelligent call, link to each other with PSTN (public switched telephone network) 15 by the Ai interface according to the instruction of SCP.C/D interface between the entity, T1 interface, T2 interface use ANSI41 (the basic network standard of traditional circuit domain system) agreement; The A interface is the information channel between BSC and the MSC.
In the professional and flow process of calling out of the signatory intelligent PPC (pre-payment) of traditional circuit domain user, all need comprise user roaming information when SCP (service control point) reporting information by SSF (Service Switching Function) entity.In addition, also some IN service needs SCP initiatively to obtain user roaming information.Such as, when the traditional circuit domain called subscriber contracts ICS (going into to exhale screening) IN service, need whether roam according to the user and decide preceding commentaries on classics, at this moment, SCP just need inquire about called positional information to the HLR of user attaching (attaching position register).
Except that above-mentioned IN service, also have the IN service of a lot of traditional circuit domains need obtain user's roaming information, provide corresponding service at the situation of user's roaming.The Calling Side of roaming information can be by trigger intelligent business the sign of MSC obtain, can obtain the TLDN (interim local number) that distributes into the called subscriber by visited MSC at callee side, perhaps SCP also can obtain to the HLR of user attaching inquiry.
Along with development of internet technology, the carrying of next generation communication network has begun to use instead IP comprehensively, promptly adopts the multi-media network of all-IP.From the development of communication network,, all experienced from the legacy circuit-switched networks network to control and carried the IP packet network of separation again to the such evolution process of the multi-media network of all-IP no matter be CDMA or GSM/WCDMA network.The example that is evolved to cdma network, the cdma network carrying is carried from initial TDM (time division multiplexing), to having defined LMSD (traditional mobile domains) and two evolution stages of MMD (multimedia domain, MMD), select the carrying of IP, and A interface (interface between BSC and the MSC) is selected IP on bearer types as core net and Access Network.CDMALMSD stage circuit domain has realized separating of carrying and control, supports IP on bearer types; The MMD version is then introduced IMS (IP Multimedia System) territory, interface signaling IPization in core net.The final goal of this evolution process is to provide professional by unified IMS network.
The MMD network architecture of CDMA definition as shown in Figure 2, wherein,
S-CSCF (serving session control function) the 21st, the core of IMS, it is positioned at home network, for UE carries out session control and registration service.When UE is in the session, S-CSCF peace preservation association speech phase, and according to the needs of Virtual network operator to service support, carry out alternately to provide professional with service platform (AS).
HSS (home subscriber server) the 22nd, the main memory of all data relevant with service among the IMS with the user, the data owner that is stored in HSS will comprise user identity, log-on message, access parameter and service trigger message;
AS (application server) 23 provides the entity of value-added service;
P-CSCF (agent call server controls function) the 24th, first contact point of user in the IMS system; this entity provides the integrity protection of SIP signaling; and keep the Security Association between UE and the P-CSCF, this entity is used for the forwards between UE and the serving CSCF.
MGCF (MGCF) 25 and BGCF (Breakout Gateway Control Function) the 26th, IMS that provide with node existing network interworking.
In this network architecture, where no matter all users in IMS territory roam into, and all is registered to the S-CSCF of home domain, and all business all provide at home domain.This point is different with traditional circuit domain, and the traditional circuit domain user always is registered to the MSC on visit ground, and the business of Calling Side is provided by visited MSC fully or triggers, and the professional part of callee side is provided by the MSC of called home network, and a part is provided by visited MSC.And all business of IMS territory user all trigger at home domain, so that dispose new business flexibly apace in the user attaching territory.
When the traditional circuit domain network transition behind the IMS network, still be necessary intelligent network is incorporated into the IMS territory.At present, GSM/WCDMA is incorporated into CAMEL (mobile network strengthens the customization of logic and uses) function structure the IMS territory, and has defined relevant criterion.
Fig. 3 is a kind of framework that the traditional circuit area intelligent service is provided to IMS territory user that defines in the existing 3GPP standard:
This standard has been introduced the functional entity of IM-SSF (IP Multimedia System function of exchange) 31 in the IMS territory, IM-SSF is as an AS on the one hand, receive the sip message that S-CSCF32 sends by ISC interface, relevant signaling is called out in perception, IM-SSF is as a SSF on the other hand, and it detects the user needs to be triggered to SCP and go to carry out business control behind the bid of IMS territory.IM-SSF downloads intelligent subscription data by the Si interface, and according to this subscription data or network configuration cases, calling is triggered to corresponding SCP, carries out IN service and handles.Has the MAP interface between the functional entity of gsmSCP in the GSM network (service control point of GSM network) 33 and the HSS/HLR (home subscriber server/home location register) 34, can obtain the positional information (roaming information) of user by this interface in circuit domain, signatory situation of IN service and calling locking, preceding commentaries on classics waits other circuit domain supplementary service information.CAMEL Application Part (being used for the GSM network) can be used alternately between IM-SSF and the gsmSCP in this standard, similarly the ANSI41 agreement can be used alternately between IM-SSF and the CDMA IN service controlled function entity (WinSCP).
In the prior art, IM-SSF has the ability that is triggered to CDMA IN service controlled function entity WinSCP, but its interface protocol still uses the ANSI41 agreement of traditional circuit domain.The SCP of traditional circuit domain is that the MSC/SSF sign by the Calling Side trigger intelligent business and the TLDN of callee side visited MSC distribution obtain user roaming information, but in the IMS territory, business is to trigger at home domain all the time, so can not obtain user roaming information by the sign of trigger intelligent business IM-SSF at Calling Side WinSCP; Also no longer include the process of distribution T LDN (because the user is registered to the S-CSCF of home domain all the time at callee side, so S-CSCF just can be routed directly to the called subscriber according to the address of when registration registration, do not need to arrive again the visit territory and distribute routing number), WinSCP can not obtain roaming information by TLDN.
In addition, directly obtain this situation of routing iinformation for SCP in the traditional circuit domain to HLR, because among the GSM/WCDMA mobile network, IMS territory and circuit domain are and deposit, its HSS has the HLR function, so the gsmSCF among the GSM/WCDMA mobile network can obtain the user the position of circuit domain (roaming) information (prerequisite is that the user registers in circuit domain) by the MAP interface.And in cdma network, the relation of IMS territory and circuit domain is a substitutional relation, and its HSS and HLR set up separately, and the HSS in IMS territory does not store the user visiting domain information, thus winSCP can't by with the roaming information that obtains IMS territory user alternately of HSS.
As seen, if IM-SSF still uses traditional circuit domain interface and winSCP mutual, IMS territory user's roaming information then can't be provided, a lot of IN services do not have user roaming information then can't realize, IN services such as PPC that arrives as prerequisite and ICS cause these business can't offer IMS territory user.
Summary of the invention
In the prior art, IM-SSF has the ability that is triggered to CDMA IN service controlled function entity WinSCP, but its interface protocol still uses the ANSI41 agreement of traditional circuit domain.The SCP of traditional circuit domain is that the MSC/SSF sign by the Calling Side trigger intelligent business and the TLDN of callee side visited MSC distribution obtain user roaming information, but in the IMS territory, business is to trigger at home domain all the time, so can not obtain user roaming information by the sign of trigger intelligent business IM-SSF at Calling Side WinSCP; Also no longer include the process of distribution T LDN (because the user is registered to the S-CSCF of home domain all the time at callee side, so S-CSCF just can be routed directly to the called subscriber according to the address of when registration registration, do not need to arrive again the visit territory and distribute routing number), WinSCP can not obtain roaming information by TLDN.
In addition, directly obtain this situation of routing iinformation for SCP in the traditional circuit domain to HLR, because among the GSM/WCDMA mobile network, IMS territory and circuit domain are and deposit, its HSS has the HLR function, so the gsmSCF among the GSM/WCDMA mobile network can obtain the user the position of circuit domain (roaming) information (prerequisite is that the user registers in circuit domain) by the MAP interface.And in cdma network, the relation of IMS territory and circuit domain is a substitutional relation, and its HSS and HLR set up separately, and the HSS in IMS territory does not store the user visiting domain information, thus winSCP can't by with the roaming information that obtains IMS territory user alternately of HSS.
As seen, if IM-SSF still uses traditional circuit domain interface and winSCP mutual, IMS territory user's roaming information then can't be provided, a lot of IN services do not have user roaming information then can't realize, IN services such as PPC that arrives as prerequisite and ICS cause these business can't offer IMS territory user.
Main purpose of the present invention provides a kind of method of circuit domain network to get IMS domain user information, mutual with IN service controlled function entity WinSCP in IP Multimedia System function of exchange entity IM-SSF use traditional circuit domain interface and the cdma network in the solution prior art, the problem of IMS territory user roaming information can't be provided to WinSCP, make WinSCP obtain IMS territory user roaming information effectively.
Another object of the present invention provides a kind of system of circuit domain network to get IMS domain user information, so that IN service controlled function entity WinSCP obtains IMS territory user roaming information effectively in the cdma network.
For this reason, the invention provides following technical scheme:
A kind of method of circuit domain network to get IMS domain user information may further comprise the steps:
A, obtain IP Multimedia System IMS territory user roaming information by IP Multimedia System function of exchange entity IM-SSF, described IMS territory user roaming information comprises: the user inserts the visit domain information of the entrance in IMS territory, and the visit domain information that described user inserts the entrance in IMS territory comprises the visit domain identifier of acting on behalf of call server controlled function entity P-CSCF generation when the user registers; The visit domain identifier that P-CSCF generated when described user registered is obtained by third-party registration mechanism by described IM-SSF;
B, IP Multimedia System function of exchange entity offer IN service controlled function entity SCP in the Code Division Multiple Access (CDMA) network with the IMS territory user roaming information of obtaining.
Described method further comprises step:
C, SCP utilize described IMS territory user roaming information to realize IN service for this user.
Alternatively, described step B is specially:
IM-SSF initiatively reports IMS territory user roaming information to SCP according to trigger condition.
Alternatively, described IM-SSF initiatively reports the step of IMS territory user roaming information to comprise to SCP according to the intelligent trigger condition:
Call for when asking message when IMS territory user sends the beginning as caller to the serving session control function entity S-CSCF of calling subscriber registration, the initial filter criteria that S-CSCF contracts according to the calling subscriber is called for the beginning and is asked forwards to arrive IM-SSF;
IM-SSF sends initial request message according to user's CAMEL-Subscription-Information to SCP;
The prepayment service and support this calling if the calling subscriber has contracted, then SCP returns the initial request response message to IM-SSF, and indicating call continues;
After IM-SSF receives described initial request response message, send the parsing notification message to SCP, and in this message, carry calling subscriber's roaming information and called subscriber's routing iinformation.
Described step C is specially:
SCP utilizes described IMS territory user roaming information for this user realizes prepayment service, may further comprise the steps:
SCP according in the described parsing notification message as the IMS territory user's of caller roaming information and called routing iinformation, determine the rate that the calling subscriber converses;
SCP control IM-SSF finishes the Business Processing process of calling and called.
Alternatively, described IM-SSF initiatively reports the step of IMS territory user roaming information to comprise to SCP according to the intelligent trigger condition:
When IMS territory user when called, the serving session control function entity S-CSCF of called subscriber's registration receive the beginning of Calling Side call for ask message after, the initial filter criteria of contracting according to the called subscriber is called for the beginning and is asked forwards to arrive IM-SSF;
IM-SSF sends the parsing notification message according to user's CAMEL-Subscription-Information to SCP;
The prepayment service and support this calling if the called subscriber has contracted, then SCP returns to IM-SSF and resolves push-notification-answer message, and indicating call continues;
After IM-SSF receives described parsing push-notification-answer message, send the parsing notification message to SCP, and in this message, carry called subscriber's roaming information and called subscriber's routing iinformation.
Described step C is specially:
SCP utilizes described IMS territory user roaming information for this user realizes prepayment service, may further comprise the steps:
SCP according in the described parsing notification message as called IMS territory user's roaming information, determine the rate that the called subscriber converses;
SCP control IM-SSF finishes the Business Processing process of calling and called.
Alternatively, described step B is specially:
IM-SSF reports IMS territory user roaming information according to the request of SCP to SCP.
Described IM-SSF reports the step of IMS territory user roaming information to comprise according to the request of SCP to SCP:
When IMS territory user when called, the serving session control function entity S-CSCF of called subscriber's registration receive the beginning of Calling Side call for ask message after, the initial filter criteria of contracting according to the called subscriber is called for the beginning and is asked forwards to arrive IM-SSF;
IM-SSF sends the parsing notification message according to user's CAMEL-Subscription-Information to SCP, and carries in this message into exhaling the required session information of screening IN service;
SCP sends Probe Messages to IM-SSF, and indicates in this message and need called subscriber's roaming information;
IM-SSF returns probe response messages to SCP after receiving described Probe Messages, and carries called subscriber's roaming information in this message.
Described step C is specially:
SCP utilizes described IMS territory user roaming information to realize may further comprise the steps into exhaling screening professional for this user:
SCP according in the described probe response messages as called IMS territory user's roaming information, judge whether the called subscriber has roamed into the other places;
If roamed into the other places and need then return parsing push-notification-answer message, and the information of in this message, carrying forwarding subscriber with Call Forwarding to other users to IM-SSF;
Otherwise SCP control IM-SSF finishes the Business Processing process of calling and called.
Preferably, IM-SSF is carried at IMS territory user roaming information in the spreading parameter of ANSI41 protocol message and reports SCP.
Described IMS territory user roaming information also comprises: the real geographical location information of user.
The real geographical location information of described user comprises Cell Global Identity information, further comprises: the type of user access networks.
IM-SSF by with cdma network in location-server obtain the real geographical location information of user alternately.
A kind of system of circuit domain network to get IMS domain user information comprises: the IN service controlled function entity SCP in IP Multimedia System function of exchange entity IM-SSF, the cdma network, wherein,
IP Multimedia System function of exchange entity IM-SSF comprises:
IMS territory user roaming information acquiring unit, be used to obtain IP Multimedia System IMS territory user roaming information, described IMS territory user roaming information comprises: the user inserts the visit domain information of the entrance in IMS territory, and the visit domain information that described user inserts the entrance in IMS territory comprises the visit domain identifier of acting on behalf of call server controlled function entity P-CSCF generation when the user registers; The visit domain identifier that P-CSCF generated when described IMS territory user roaming information acquiring unit obtained described user and registers by third-party registration mechanism;
IMS territory user roaming information provides the unit, and the ANSI41 protocol message parameter of utilizing expansion offers IN service controlled function entity SCP in the cdma network with described IMS territory user roaming information.
Alternatively, described IP Multimedia System function of exchange entity IM-SSF also comprises:
The trigger condition detecting unit, be used to detect the type of message that IM-SSF receives, and determine the IM-SSF needs initiatively when SCP provides IMS territory user roaming information according to testing result, notice IMS territory user roaming information provides the unit that required IMS territory user's roaming information is added in the message that need send to SCP.
Alternatively, the IN service controlled function entity SCP in the described cdma network comprises:
IMS territory user roaming information request unit, the ANSI41 protocol message that utilizes expansion is to IM-SSF request IMS territory user roaming information;
Described IP Multimedia System function of exchange entity IM-SSF also comprises:
The solicited message detecting unit, be used to detect the message content that IM-SSF receives and whether comprise the indication that needs IMS territory user roaming information from SCP, if contain this indication, then notify IMS territory user roaming information to provide the IMS territory user of unit with being asked roaming information to add in the message that need send to SCP.
Preferably, the IN service controlled function entity SCP in the described cdma network further comprises:
IMS territory user roaming information extraction unit is used for extracting that SCP receives from the IMS territory user roaming information of the message of IM-SSF;
The IN service control unit, the IMS territory user roaming information that is used for obtaining according to IMS territory user roaming information extraction unit is controlled this user's IN service process.
By above technical scheme provided by the invention as can be seen, the present invention is by expanding the interface between IN service controlled function entity WinSCP and the IP Multimedia System function of exchange entity IM-SSF, IM-SSF obtains IMS territory user roaming information when the user carries out session, and provide IMS territory user's roaming information to the WinSCP of correspondence by the interface after the expansion, make the WinSCP can this information of perception, thereby provide perfect IN service to IMS territory user, reach the purpose of the service control point (SCP) of reusing original circuit domain, significantly reduce the investment of Virtual network operator.
Description of drawings
Fig. 1 is the intelligent network framework of existing CDMA traditional circuit domain;
Fig. 2 is the MMD network architecture of existing CDMA definition;
Fig. 3 is the existing framework that the traditional circuit area intelligent service is provided to IMS territory user;
Fig. 4 is the system architecture of IN service controlled function entity WinSCP sensing IMS field user roaming information among the present invention;
Fig. 5 is the realization flow figure of the inventive method first embodiment;
Fig. 6 is the realization flow figure of the inventive method second embodiment;
Fig. 7 is the present invention is provided prepayment service to IMS territory calling subscriber by IN service controlled function entity message interaction process figure;
Fig. 8 is the present invention is provided prepayment service to IMS territory called subscriber by IN service controlled function entity message interaction process figure;
Fig. 9 is that the present invention is provided into the message interaction process figure that exhales the screening IN service to the IMS territory by IN service controlled function entity;
Figure 10 is the theory diagram of first embodiment of system of the present invention;
Figure 11 is the theory diagram of second embodiment of system of the present invention.
Embodiment
Core of the present invention is the interface between IN service controlled function entity WinSCP and the IP Multimedia System function of exchange entity IM-SSF is expanded, IM-SSF obtains IMS territory user roaming information when the user carries out session, and provide IMS territory user's roaming information to the WinSCP of correspondence by the interface after the expansion, make the WinSCP can this information of perception, thereby provide perfect IN service to IMS territory user.Described roaming information can be the visit domain information that real geographical location information of user and/or user insert the entrance in IMS territory.IM-SSF provides the mode of IMS territory user's roaming information, and can be IM-SSF report according to the active of intelligent trigger condition to WinSCP, also can be that WinSCP request IM-SSF reports.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
At first, with reference to Fig. 4, Fig. 4 is the system architecture of IN service controlled function entity WinSCP sensing IMS field user roaming information among the present invention:
Wherein, the effect of each network element is as follows:
S-CSCF (serving session control function entity) 41 carries out session control and registration service for IMS territory user, when the user is in the session, S-CSCF peace preservation association speech phase, and according to the needs of Virtual network operator to service support, undertaken providing corresponding service by service platform alternately by ISC interface and service platform (AS).
IM-SSF (IP Multimedia System function of exchange entity) 42 is on the one hand as service platform (AS), the session control signaling that reception is sent from S-CSCF, on the other hand as the Service Switching Function entity (SSF) in the CDMA intelligent network, according to user's intelligence subscription data (downloading from HSS) by the Si/Sh interface, T1 interface (T1 ') by expansion provides business information (this information is extracted) to the IN service controlled function entity (WinSCP) of correspondence from session control signaling, provide corresponding IN service by winSCP.Especially, IM-SSF need pass through T1 ' interface provides IMS territory user's roaming information to WinSCP, makes the WinSCP can this information of perception, thereby perfect IN service is provided.
WinSCP (IN service controlled function entity) the 43rd, the IN service controlled function entity in the cdma network, i.e. SCP, the session information that this entity reports according to SSF provides corresponding IN service.
HSS (home subscriber server) 44 deposits the related data relevant with service with the user, comprise intelligent subscription data, these data can use Diameter (aaa protocol of a new generation) agreement to download to IM-SSF by Si interface (using the ANSI41 agreement) or Sh interface, and IM-SSF is mutual with corresponding WinSCP according to these data.
The present invention has expanded the T1 interface, makes this interface not only can transmit the required session information of primary circuit area intelligent service, can also transmit IMS territory user's roaming information, this information provide following dual mode:
(1) IM-SSF initiatively reports when the user carries out session;
(2) WinSCP initiatively obtains user roaming information to IM-SSF.
Based on this network architecture, cdma network of the present invention obtain IMS domain user profile method first embodiment realization flow as shown in Figure 5, may further comprise the steps:
Step 501: obtain IMS territory user roaming information by IM-SSF.
Can when the user carries out session, obtain IMS territory user roaming information, also can or under situations such as location-server inquiry, obtain IMS territory user roaming information in user's registration by IM-SSF by IM-SSF.
IMS territory user roaming information comprises: the real geographical location information of user; And/or the user inserts the visit domain information of the entrance in IMS territory.Wherein, the real geographical location information of user comprises Cell Global Identity information, further can also comprise: the type of user access networks; The visit domain information that the user inserts the entrance in IMS territory comprises the visit domain identifier of acting on behalf of call server controlled function entity P-CSCF generation when the user registers.
The visit domain identifier that P-CSCF generated when IM-SSF can obtain the user and registers by third-party registration mechanism, perhaps by with cdma network in location-server obtain the real geographical location information of user alternately, perhaps by obtaining in the Client-initiated conversation message.Concrete acquisition process is same as the prior art, does not repeat them here.
Step 502:IM-SSF initiatively reports IMS territory user roaming information to SCP according to the IN service trigger condition, and carries described IMS territory user roaming information by the ANSI41 protocol parameter of expansion.
Such as, in prepayment service, IMS territory user initiates caller, by SCP when it provides this business, IM-SSF detect the user contracted the caller route can be with behind the trigger (this trigger is the part of user's intelligent subscription data of download when registering), by resolving notification message ANLYZD user's roaming is sent to SCP, the ANSI41 protocol parameter by expansion in this message carries IMS territory user roaming information; SCP determines the rate of calling subscriber's conversation according to this roaming information and called home network information.
For another example, in prepayment service, IMS territory user is as called, by SCP when it provides this business, IM-SSF detect the user contracted called route can be with behind the trigger, by resolving notification message ANLYZD user's roaming is sent to SCP, the ANSI41 protocol parameter by expansion in this message carries IMS territory user roaming information; SCP is according to the rate of this roaming information decision called subscriber conversation.
With reference to Fig. 6, Fig. 6 shows the realization flow of the inventive method second embodiment, may further comprise the steps:
Step 601: obtain IMS territory user roaming information by IM-SSF.
IMS territory user roaming information comprises: the real geographical location information of user; And/or the user inserts the visit domain information of the entrance in IMS territory.Wherein, the real geographical location information of user comprises Cell Global Identity information, further can also comprise: the type of user access networks; The visit domain information that the user inserts the entrance in IMS territory comprises the visit domain identifier of acting on behalf of call server controlled function entity P-CSCF generation when the user registers.
The visit domain identifier that P-CSCF generated when IM-SSF can obtain the user and registers by third-party registration mechanism, perhaps by with cdma network in location-server obtain the real geographical location information of user alternately or by obtaining in the Client-initiated conversation message.Concrete acquisition process is same as the prior art, does not repeat them here.
Step 602:SCP is to IM-SSF request IMS territory user roaming information.
Such as, in ICS (going into to exhale screening) IN service, whether SCP need roam according to the user is decided follow-up processing.Receive the parsing notification message ANLYZD of IM-SSF transmission at SCP after, send Probe Messages SEARCH, the request user roaming information to IM-SSF.In this message, DATAKEY represents CSI called subscriber identification by parameter, and indicating by the SDAEL parameter needs roaming information.
After step 603:IM-SSF receives the request of SCP, report IMS territory user roaming information, and carry described IMS territory user roaming information by the ANSI41 protocol parameter of expansion to SCP.
As above-mentioned ICS IN service, IM-SSF returns probe response messages search to it after receiving the SEARCH message of SCP, and the ANSI41 protocol parameter by expansion in this message carries IMS territory user roaming information.
Fig. 7 is the present invention is provided prepayment service to IMS territory calling subscriber by IN service controlled function entity a message interaction process:
1, calling subscriber UE1 sends to begin to call for to the S-CSCF of its registration by P-CSCF and asks INVITE (for the purpose of omitting among the figure, P-CSCF does not draw), the user ID (by the parameter p in the request message-asserted-identity) carry) and the opposite end user ID (by the parameter request_url in the request message) that comprise calling subscriber UE1 in the request message are carried), the iFC that S-CSCF contracts according to the user (initial filter criteria) calls for the beginning to ask and is forwarded to IM-SSF;
2, IM-SSF judges calling subscriber's Origination_Attempt_Authorized (beginning exhales and attempts authorizing) trigger of having contracted, address according to the IN service controlled function entity SCP of this recording trigger, send ORREQ (Original Request to SCP, initial request) message, carry calling subscriber identification and MSC sign (MSCID) in this message, wherein the sign of MSCID is the sign of home domain IM-SSF;
3, SCP checks that the calling subscriber has activated PPC (pre-payment) business and user and had enough account balance supports and call out specifically, then return the response message orreq of initial request to IM-SSF, in this message, carry DMH_SVCID (service identification), for the PPC business, return the PPC business, this IN service of notice IM-SSF is the PPC business, and indicating call continues;
4, IM-SSF judges calling subscriber's Calling_Routing_Address_Available (caller routing address can with) trigger of having contracted, SCP address according to this recording trigger, send parsing notification message ANLYZD to SCP, remove and carry the called routing iinformation that obtains according to CSI called subscriber identification, outside calling subscriber identification and the MSC sign information such as (MSCID), also will carry user's roaming information, this roaming information can insert the visit domain information of the entrance in IMS territory for the real geographical location information of user and/or user.Can carry IMS territory user roaming information by the ANSI41 protocol parameter of expansion, such as, parameter raoming_info of redetermination carries IMS territory user roaming information by this parameter in the ANSI41 agreement.
The real geographical location information of user can use Cell Global Identity (GCI), and the type parameter that optionally has user access networks inserts the IMS territory with identifying user with which kind of access technology, such as 3G, and WLAN (WLAN (wireless local area network) etc.);
The visit domain identifier P-Visited-Network-ID that P-CSCF when the visit domain information that the user inserts the IMS territory can use the user to register (P-CSCF is the entrance that the user inserts the IMS territory, might be in the visit territory) generates;
IM-SSF can obtain these information by prior art as AS, and the visit domain identifier P-Visited-Network-ID that P-CSCF generates when registering as obtaining the user by third-party registration mechanism is by obtaining customer position information etc. alternately with location-server;
5, SCP obtains user's roaming information according to this message, obtains called home network information according to called routing iinformation, thus the rate of decision calling subscriber conversation return to MSC/SSF and to resolve push-notification-answer message anlyzd, indicating call continues;
6, IM-SSF handle IN service mutual after, returning the beginning to S-CSCF calls for and asks message, and will self be inserted in the call path, promptly call for and ask the new route header field of insertion in the message in the beginning, the Route Distinguisher that comprises IM-SSF guarantees that so follow-up SIP request and response message all pass through IM-SSF;
7, S-CSCF is routed to call request the called subscriber UE2 of callee side network;
8, the caller and called users carrying of setting up between the calling and called by media negotiation and resource reservation process connects;
9, the called subscriber returns session response message 200OK;
10, because IM-SSF has been inserted in the call path, therefore, S-CSCF can be transmitted to IM-SSF with the session response message;
11, IM-SSF judges calling subscriber's O_Answer (caller is replied) trigger of having contracted, and according to the SCP address of this recording trigger, sends OANSWER message to SCP, carries information such as active user connect hours TOD, TDO; Wherein, TOD (TimeOfDay) and the time difference between morning Coordinated Universal Time(UTC) this day were unit with 1/10th seconds; TDO (timeDateOffset) is local zone time and the time deviation between the Coordinated Universal Time(UTC), to be divided into unit, comprises the deviation that time zone and daylight-saving time cause;
12, IM-SSF is by S-CSCF, and P-CSCF gives the calling subscriber with the called subscriber answer forwards.
Fig. 8 is the present invention is provided prepayment service to IMS territory called subscriber by IN service controlled function entity a message interaction process:
1, Calling Side user UE1 calls for the beginning and asks message INVITE to be routed to the I-CSCF of called subscriber's home network, I-CSCF sends to begin to call for to the S-CSCF of called subscriber's registration and asks (for the purpose of omitting among the figure, I-CSCF does not draw), the sign (carrying) that comprises called subscriber UE2 in the request message by the parameter request_url in the request message, the iFC that S-CSCF contracts according to the user (initial filter criteria) calls for the beginning to ask and is forwarded to IM-SSF;
2, IM-SSF judges called subscriber's Initial_Termination (original termination) trigger of having contracted, SCP address according to this recording trigger, send parsing notification message ANLYZD to SCP, carry calling subscriber identification and MSC sign (MSCID) in this message, wherein the sign of MSCID is the sign of visit territory IM-SSF;
3, SCP checks that the called subscriber has activated PPC business and user and had enough account balance supports and call out specifically, then returns to IM-SSF and resolves push-notification-answer message anlyzd, and indicating call continues, and carries DMH_SVCID (PPC service identification) in this message;
4, IM-SSF judges called subscriber's Called_Routing_Address_Available (called route can get) trigger of having contracted, SCP address according to this recording trigger, send parsing notification message ANLYZD message to SCP, remove and carry called routing iinformation (this routing iinformation can be user's registered address), CSI called subscriber identification and MSC sign, be outside the information such as sign of home domain IM-SSF, also will carry user's roaming information, this roaming information can insert the visit domain information of the entrance in IMS territory for the real geographical location information of user and/or user;
The real geographical location information of user can use Cell Global Identity (GCI), and the type parameter that optionally has user access networks inserts the IMS territory with identifying user with which kind of access technology, such as 3G, and WLAN (WLAN (wireless local area network) etc.);
The visit domain identifier P-Visited-Network-ID that P-CSCF when the visit domain information that the user inserts the IMS territory can use the user to register (P-CSCF is the entrance that the user inserts the IMS territory, might be in the visit territory) generates;
IM-SSF can obtain these information by prior art as AS, and the visit domain identifier P-Visited-Network-ID that P-CSCF generates when registering as obtaining the user by third-party registration mechanism is by obtaining customer position information etc. alternately with location-server;
5, SCP is according to the called roaming information among the ANLYZD, and the rate of decision called subscriber conversation is returned parsing push-notification-answer message anlyzd to IM-SSF, and indicating call continues;
6, IM-SSF handle IN service mutual after, return the beginning to S-CSCF and call for and ask message, and will self be inserted in the call path;
7, S-CSCF is according to the address of called subscriber registration, sends the beginning by P-CSCF to the called subscriber and calls for and ask message;
8, the caller and called users carrying of setting up between the calling and called by media negotiation and resource reservation process connects;
9, the called subscriber returns session response message;
10, because IM-SSF is inserted in the call path, so S-CSCF can be transmitted to IM-SSF with the session response message;
11, IM-SSF judges called subscriber's T_Answer (called party answer) trigger of having contracted, SCP address according to this recording trigger, send called party answer message TANSWER to SCP, carry active user connect hours TOD, TDO, MSC identifies information such as (signs of home domain IM-SSF); After SCP receives this message, begin the called subscriber is chargeed;
12, IM-SSF sends called party answer message by S-CSCF to Calling Side.
If whether IMS territory user's ICS has contracted (going into to exhale screening) IN service then can be roamed according to IMS territory user and select different processing, as be in home domain and then handle, as roam into the other places and just before forward another user to and handle by this user.
Fig. 9 is that the present invention is provided into the message interaction process of exhaling the screening IN service to the IMS territory by IN service controlled function entity:
1, Calling Side is called for the beginning and is asked message to be routed to the I-CSCF of called subscriber B home network, I-CSCF sends to begin to call for to the S-CSCF of called subscriber's registration and asks (for the purpose of omitting among the figure, I-CSCF does not draw), the sign (request_url carries) that comprises called subscriber B in the request message, the iFC that S-CSCF contracts according to the called subscriber calls for the beginning to ask and is forwarded to IM-SSF;
2, IM-SSF receive the beginning call for ask after, judge called subscriber's Advance_Termination (senior termination) trigger of having contracted, SCP address according to this recording trigger, send parsing notification message ANLYZD to SCP, carry former ICS (going into to exhale screening) IN service required session information (comprising CSI called subscriber identification and calling subscriber identification etc.), DGTSDIAL (dialing numbers, i.e. CSI called subscriber identification);
3, whether SCP need roam according to the user and decide subsequent treatment, send Probe Messages SEARCH to IM-SSF, the request user roaming information, wherein the DATAKEY parameter indicates CSI called subscriber identification, the SDAEL parameter comprises the ANSI41 protocol parameter of needs, and (this parameter need be expanded to support new roaming information parameter, annotate: though this parameter just has this parameter in former ANSI41 agreement, only can comprise the parameter of former AN41 agreement) so need expansion;
4, IM-SSF returns probe response messages search, comprises user's roaming information, and this roaming information can insert the visit domain information of the entrance in IMS territory for the real geographical location information of user and/or user;
The real geographical location information of user can use Cell Global Identity (GCI), and the type parameter that optionally has user access networks inserts the IMS territory with identifying user with which kind of access technology, such as 3G, and WLAN (WLAN (wireless local area network) etc.);
The visit domain identifier P-Visited-Network-ID that P-CSCF when the visit domain information that the user inserts the IMS territory can use the user to register (P-CSCF is the entrance that the user inserts the IMS territory, might be in the visit territory) generates;
IM-SSF can obtain these information by prior art as AS, and the visit domain identifier P-Visited-Network-ID that P-CSCF generates when registering as obtaining the user by third-party registration mechanism is by obtaining customer position information etc. alternately with location-server;
5, SCP is according to roaming information, judge that the user has roamed into the other places, forward user C to before needing, then return and resolve push-notification-answer message anlyzd to IM-SSF, comprise TerminationList (terminal list) parameter (this parameter is carried called routing address information), comprise the information of forwarding subscriber C;
6, after IM-SSF receives this message,, re-construct the beginning to call for and ask message, change called party information into user C (revising the request_url parameter), and the amended beginning called for ask message to return S-CSCF according to the termlist parameter;
7, S-CSCF calls for this beginning and asks message to be routed to the network that user C is belonged to.
By above-mentioned flow process as can be known, the present invention is by expanding the interface between the IN service controlled function entity SCP in IP Multimedia System function of exchange entity IM-SSF and the cdma network, make IM-SSF that the IMS territory user roaming information of obtaining is offered SCP, make SCP can perceive IMS territory user's roaming characteristics, thereby make SCP provide perfect IN service to IMS territory user.The present invention is not limited to realize above-mentioned PPC IN service and ICS IN service, also can be applicable to other IN services, enumerates no longer one by one at this.
With reference to Figure 10, Figure 10 is the theory diagram of first embodiment of system of the present invention:
This system comprises: the IN service controlled function entity SCP102 in IP Multimedia System function of exchange entity IM-SSF101 and the cdma network.
In this system, IP Multimedia System function of exchange entity IM-SSF101 comprises: IMS territory user roaming information acquiring unit 111, trigger condition detecting unit 112, IMS territory user roaming information provide unit 113.Wherein,
IMS territory user roaming information acquiring unit 111 is used to obtain IP Multimedia System IMS territory user roaming information.Described IMS territory user roaming information comprises: the real geographical location information of user; And/or the user inserts the visit domain information of the entrance in IMS territory.Wherein, the real geographical location information of user comprises Cell Global Identity information, further comprises: the type of user access networks; The visit domain information that the user inserts the entrance in IMS territory comprises the visit domain identifier of acting on behalf of call server controlled function entity P-CSCF generation when the user registers.The visit domain identifier that P-CSCF generated when IMS territory user roaming information acquiring unit S111 can obtain the user and registers by the third-party registration mechanism in the network, perhaps by with cdma network in location-server obtain the real geographical location information of user alternately.
IMS territory user roaming information provides ANSI41 protocol message parameter that unit 113 utilizes expansion that described IMS territory user roaming information is offered IN service controlled function entity SCP in the cdma network.
Trigger condition detecting unit 112 is used to detect the type of message that IM-SSF receives, and determine the IM-SSF needs initiatively when SCP provides IMS territory user roaming information according to testing result, notice IMS territory user roaming information provides the unit that required IMS territory user's roaming information is added in the message that need send to SCP.Because in many IN services, SCP need know that IMS territory user's roaming information could realize corresponding IN service for this user.Therefore, can be according to the characteristics of interacting message between SCP and the IM-SSF in each IN service processing procedure, the type of some ANSI41 protocol messages is set in trigger condition detecting unit 112, trigger condition detecting unit 112 detects the type of message from SCP that IM-SSF receives when consistent with these types that set in advance, and promptly notifies IMS territory user roaming information to provide the IMS territory user of unit 113 with being correlated with roaming information to add in the message that need send to SCP.Like this, IM-SSF can send this user's roaming information to SCP when sending this message.
In order to make SCP provide IN service, comprise among the IN service controlled function entity SCP102 in cdma network: IMS territory user roaming information extraction unit 121 and IN service control unit 122 to IMS territory user.Wherein, IMS territory user roaming information extraction unit 121 is used for extracting that SCP receives from the IMS territory user roaming information of the message of IM-SSF; The IMS territory user roaming information that IN service control unit 122 is used for obtaining according to IMS territory user roaming information extraction unit is controlled this user's IN service process.Utilize system of the present invention, can realize multiple IN service for IMS territory user, such as, the PPC IN service of mentioning in the inventive method of front, ICS IN service etc., concrete implementation procedure can not repeat them here with reference to the description of front.
With reference to Figure 11, Figure 11 is the theory diagram of second embodiment of system of the present invention:
This system comprises: the IN service controlled function entity SCP202 in IP Multimedia System function of exchange entity IM-SSF201 and the cdma network.
IP Multimedia System function of exchange entity IM-SSF201 comprises: IMS territory user roaming information acquiring unit 111, IMS territory user roaming information provide unit 113, solicited message detecting unit 211.Wherein, IMS territory user roaming information acquiring unit 111, IMS territory user roaming information provide identical among unit 113 and first embodiment shown in Figure 10, solicited message detecting unit 211 is used to detect the message content from SCP that IM-SSF receives and whether comprises the indication that needs IMS territory user roaming information, if contain this indication information, then notify IMS territory user roaming information to provide the unit that the IMS territory user's of SCP request roaming information is added in the message that need send to SCP.
IN service controlled function entity SCP202 in the cdma network comprises: IMS territory user roaming information request unit S221, the ANSI41 protocol message that utilizes expansion is to IM-SSF request IMS territory user roaming information.That is to say, in this embodiment, need be by SCP to IM-SSF request IMS territory user roaming information, IM-SSF just can send relevant IMS territory user roaming information to SCP after only receiving this solicited message.When realizing, can when SCP needs IMS territory user roaming information, will need the indication information of IMS territory user roaming information to add in the message that need send to IM-SSF according to the characteristics of IN service by IMS territory user roaming information request unit S221.Like this, SCP sends this message, and IM-SSF just knows and need provide corresponding IMS territory user roaming information to SCP after receiving this message.
Equally, can provide IN service to IMS territory user, comprise among the IN service controlled function entity SCP12 in cdma network: IMS territory user roaming information extraction unit 121 and IN service control unit 122 in order to make SCP.Wherein, IMS territory user roaming information extraction unit 121 is used for extracting that SCP receives from the IMS territory user roaming information of the message of IM-SSF; The IMS territory user roaming information that IN service control unit 122 is used for obtaining according to IMS territory user roaming information extraction unit is controlled this user's IN service process.Utilize system of the present invention, can realize multiple IN service for IMS territory user, such as, the PPC IN service of mentioning in the inventive method of front, ICS IN service etc., concrete implementation procedure can not repeat them here with reference to the description of front.
As seen from the above-described embodiment, utilize system of the present invention, can in the service interaction process, can finish the user roaming information transmission of IMS territory simply, easily, and do not need special-purpose Signalling exchange, thereby saved overhead.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.

Claims (18)

1. the method for a circuit domain network to get IMS domain user information is characterized in that, may further comprise the steps:
A, obtain IP Multimedia System IMS territory user roaming information by IP Multimedia System function of exchange entity IM-SSF, described IMS territory user roaming information comprises: the user inserts the visit domain information of the entrance in IMS territory, and the visit domain information that described user inserts the entrance in IMS territory comprises the visit domain identifier of acting on behalf of call server controlled function entity P-CSCF generation when the user registers; The visit domain identifier that P-CSCF generated when described user registered is obtained by third-party registration mechanism by described IM-SSF;
B, IP Multimedia System function of exchange entity offer IN service controlled function entity SCP in the Code Division Multiple Access (CDMA) network with the IMS territory user roaming information of obtaining.
2. method according to claim 1 is characterized in that, described method further comprises step:
C, SCP utilize described IMS territory user roaming information to realize IN service for this user.
3. method according to claim 2 is characterized in that, described step B is specially:
IM-SSF initiatively reports IMS territory user roaming information to SCP according to trigger condition.
4. method according to claim 3 is characterized in that, described IM-SSF initiatively reports the step of IMS territory user roaming information to comprise to SCP according to the intelligent trigger condition:
Call for when asking message when IMS territory user sends the beginning as caller to the serving session control function entity S-CSCF of calling subscriber registration, the initial filter criteria that S-CSCF contracts according to the calling subscriber is called for the beginning and is asked forwards to arrive IM-SSF;
IM-SSF sends initial request message according to user's CAMEL-Subscription-Information to SCP;
The prepayment service and support this calling if the calling subscriber has contracted, then SCP returns the initial request response message to IM-SSF, and indicating call continues;
After IM-SSF receives described initial request response message, send the parsing notification message to SCP, and in this message, carry calling subscriber's roaming information and called subscriber's routing iinformation.
5. method according to claim 4 is characterized in that, described step C is specially:
SCP utilizes described IMS territory user roaming information for this user realizes prepayment service, may further comprise the steps:
SCP according in the described parsing notification message as the IMS territory user's of caller roaming information and called routing iinformation, determine the rate that the calling subscriber converses;
SCP control IM-SSF finishes the Business Processing process of calling and called.
6. method according to claim 3 is characterized in that, described IM-SSF initiatively reports the step of IMS territory user roaming information to comprise to SCP according to the intelligent trigger condition:
When IMS territory user when called, the serving session control function entity S-CSCF of called subscriber's registration receive the beginning of Calling Side call for ask message after, the initial filter criteria of contracting according to the called subscriber is called for the beginning and is asked forwards to arrive IM-SSF;
IM-SSF sends the parsing notification message according to user's CAMEL-Subscription-Information to SCP;
The prepayment service and support this calling if the called subscriber has contracted, then SCP returns to IM-SSF and resolves push-notification-answer message, and indicating call continues;
After IM-SSF receives described parsing push-notification-answer message, send the parsing notification message to SCP, and in this message, carry called subscriber's roaming information and called subscriber's routing iinformation.
7. method according to claim 6 is characterized in that, described step C is specially:
SCP utilizes described IMS territory user roaming information for this user realizes prepayment service, may further comprise the steps:
SCP according in the described parsing notification message as called IMS territory user's roaming information, determine the rate that the called subscriber converses;
SCP control IM-SSF finishes the Business Processing process of calling and called.
8. method according to claim 2 is characterized in that, described step B is specially:
IM-SSF reports IMS territory user roaming information according to the request of SCP to SCP.
9. method according to claim 8 is characterized in that, described IM-SSF reports the step of IMS territory user roaming information to comprise according to the request of SCP to SCP:
When IMS territory user when called, the serving session control function entity S-CSCF of called subscriber's registration receive the beginning of Calling Side call for ask message after, the initial filter criteria of contracting according to the called subscriber is called for the beginning and is asked forwards to arrive IM-SSF;
IM-SSF sends the parsing notification message according to user's CAMEL-Subscription-Information to SCP, and carries in this message into exhaling the required session information of screening IN service;
SCP sends Probe Messages to IM-SSF, and indicates in this message and need called subscriber's roaming information;
IM-SSF returns probe response messages to SCP after receiving described Probe Messages, and carries called subscriber's roaming information in this message.
10. method according to claim 9 is characterized in that, described step C is specially:
SCP utilizes described IMS territory user roaming information to realize may further comprise the steps into exhaling screening professional for this user:
SCP according in the described probe response messages as called IMS territory user's roaming information, judge whether the called subscriber has roamed into the other places;
If roamed into the other places and need then return parsing push-notification-answer message, and the information of in this message, carrying forwarding subscriber with Call Forwarding to other users to IM-SSF;
Otherwise SCP control IM-SSF finishes the Business Processing process of calling and called.
11. method according to claim 1 is characterized in that,
IM-SSF is carried at IMS territory user roaming information in the spreading parameter of ANSI41 protocol message and reports SCP.
12. method according to claim 1 is characterized in that, described IMS territory user roaming information also comprises: the real geographical location information of user.
13. method according to claim 12 is characterized in that,
The real geographical location information of described user comprises Cell Global Identity information, further comprises: the type of user access networks.
14. method according to claim 12 is characterized in that,
IM-SSF by with cdma network in location-server obtain the real geographical location information of user alternately.
15. the system of a circuit domain network to get IMS domain user information comprises: the IN service controlled function entity SCP in IP Multimedia System function of exchange entity IM-SSF, the cdma network, it is characterized in that,
IP Multimedia System function of exchange entity IM-SSF comprises:
IMS territory user roaming information acquiring unit, be used to obtain IP Multimedia System IMS territory user roaming information, described IMS territory user roaming information comprises: the user inserts the visit domain information of the entrance in IMS territory, and the visit domain information that described user inserts the entrance in IMS territory comprises the visit domain identifier of acting on behalf of call server controlled function entity P-CSCF generation when the user registers; The visit domain identifier that P-CSCF generated when described IMS territory user roaming information acquiring unit obtained described user and registers by third-party registration mechanism;
IMS territory user roaming information provides the unit, and the ANSI41 protocol message parameter of utilizing expansion offers IN service controlled function entity SCP in the cdma network with described IMS territory user roaming information.
16. system according to claim 15 is characterized in that, described IP Multimedia System function of exchange entity IM-SSF also comprises:
The trigger condition detecting unit, be used to detect the type of message that IM-SSF receives, and determine the IM-SSF needs initiatively when SCP provides IMS territory user roaming information according to testing result, notice IMS territory user roaming information provides the unit that required IMS territory user's roaming information is added in the message that need send to SCP.
17. system according to claim 15 is characterized in that,
IN service controlled function entity SCP in the described cdma network comprises:
IMS territory user roaming information request unit, the ANSI41 protocol message that utilizes expansion is to IM-SSF request IMS territory user roaming information;
Described IP Multimedia System function of exchange entity IM-SSF also comprises:
The solicited message detecting unit, be used to detect the message content that IM-SSF receives and whether comprise the indication that needs IMS territory user roaming information from SCP, if contain this indication, then notify IMS territory user roaming information to provide the IMS territory user of unit with being asked roaming information to add in the message that need send to SCP.
18. system according to claim 15 is characterized in that, the IN service controlled function entity SCP in the described cdma network further comprises:
IMS territory user roaming information extraction unit is used for extracting that SCP receives from the IMS territory user roaming information of the message of IM-SSF;
The IN service control unit, the IMS territory user roaming information that is used for obtaining according to IMS territory user roaming information extraction unit is controlled this user's IN service process.
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朱巍，张顺颐.基于IMS的固定与移动网络的融合.邮电设计技术 2.2006,(2),第1.1节、第2.3节.
朱巍,张顺颐.基于IMS的固定与移动网络的融合.邮电设计技术 2.2006,(2),第1.1节、第2.3节. *

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