CN1825830A

CN1825830A - System and method for implementing route control

Info

Publication number: CN1825830A
Application number: CNA2005100751463A
Authority: CN
Inventors: 朱东铭; 张海; 段小琴; 张鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-06-08
Filing date: 2005-06-08
Publication date: 2006-08-30
Anticipated expiration: 2025-06-08
Also published as: CN1319350C

Abstract

This invention discloses a method for realizing route control used in the route control including IMS domain and CS domain, in which, said method includes setting a route decision point in advance and designing route strategy information in the point, a strategy entity inquires about the current route decision to the point, which determines the current route decision information based on the current strategy information and related information kept in the CS/IMS domain, the point feeds back the current strategy information to the entity to finish the successive control based on the information. This invention also provides a system for route control.

Description

Realize the system and method for route control

Technical field

The present invention relates to communication technical field, be meant the system and method for realizing route control especially.

Background technology

From 3rd Generation Partnership Project (3GPP) the R5 stage, universal mobile telecommunications system (UMTS) core net is divided into circuit switching (CS, Circuit Switched Domain) territory, packet switching (PS) territory and IP Multimedia System (IMS), wherein, the CS territory is used for providing to the user connection of Circuit Service, comprises MSC (MSC Server/CS-MGW), GMSC, IWF.MSC is used to finish the exchange and the signaling controlled function of circuit switched type business; GMSC is the MSC that finishes mobile subscriber's routing addressing function in a certain network, can close with MSC if set up separately; IWF is used for being closely related with MSC, finishes PLMN net and ISDN, the internetwork intercommunication of PSTN, PDN (mainly finishing the signaling translation function), and concrete function is according to professional different regulations with the network kind.

PS territory (Packet Switched Domain): be used for providing the connection of packet-type business, comprise: GSN, BG to the user.Wherein, GSN is used to finish the transmission of Packet Service user's grouping bag, and GSN comprises SGSN and GGSN again.SGSN provides being connected of core net and wireless access system BSS, RNS, finish the function such as mobile management, session management of multicomponent data business, management MS moving and communication service in the mobile network, GGSN also has the function of inquiring position information simultaneously as the interface between mobile communication system and other public data network.SGSN, GGSN all provide charge information.BG is used to finish the intercommunication between two GPRS network, guarantees the fail safe of network interworking.

In addition, the shared functional entity in CS territory and PS territory also comprises: HLR/AuC:HLR finishes the management of user contracting data (MSISDN, IMSI, PDP ADDRESS, signatory telecommunication service and supplementary service and the professional scope of application thereof etc.) and positional information (MSRN, MSC/VLR number, SGSN number, GMLC etc.), and AUC then stores user's authentication arithmetic and key; Other comprise the VLR that handles the various data messages of visitor, the EIR of storage customer equipment identification IMEI information and Gateway Short Message Center MSC (SMS-GMSC/SMS IMSC) etc.

IMS (IP Multimedia Subsystem) is a subsystem that is superimposed upon in the WCDMA network that increases in the 3GPP R5 stage on the existing packet domain, adopt the bearer path of packet domain for its upper strata control signaling and media delivery, introduce Session Initiation Protocol as professional control protocol, utilize simple, the easy expansion of SIP, media combination characteristics easily, by business control is separated with carrying control, provide abundant multimedia service; Among the IMS main functional entity comprise functions such as control user registration, session control controlling call entity CSCF, provide miscellaneous service logic control function application server AS, manage the home subscriber server HSS of user contracting data concentratedly and be used to realize MGCF/IM-MGW with the circuit switching net interconnecting, the user is by current location agent node P-CSCF access IMS, and session and professional triggering control reach with the business control of AS and then finished by the home domain service node S-CSCF of its registered place alternately.

HSS in the IMS system is the superset of HLR, can compatible HLR on the function, but because factors such as networking process, HSS and CS/PS HLR are likely situation about setting up separately in the concrete networking.

Solved the roam charge that the required solution of multimedia service is provided under the IP carrying by the defined IMS framework of 3GPP standard comprehensively, QoS, but the problems of operation that safety guarantee etc. are crucial, its framework and thinking have obtained industry and have generally acknowledged, 3GPP2, TISPAN has all carried out the definition of corresponding IP multi-media network framework and business system with the 3GPP model as basis and reference, 3GPP has also begun to insert and UMTS intercommunication (I-WLAN) at WLAN, fixed broadband inserts IMS (FBI) and towards the all-IP net subject studies such as (AIPN) of multiple access technology, the user can signatory insert IMS by single multimode terminal or polytype different terminals via the Access Network of different access technologies according to it, to obtain unified multimedia service, comprise the VoIP business.

In addition, MNP (Mobile Number Portability, mobile number carries) be that a kind of user of making can be in the ability that does not change change subscription network under its Mobile Subscriber International ISDN Number situation, its main thought is: build shared NPDB (number portability database) with the current subscription network of recording user between described different subscription network, and when each network is determined the called route of user, then finish the inquiry of NPDB to determine the current network of being contracted of user by modes such as intelligent network or signaling relayings.

But, because what in fact MNP solved is the problem of a user and the change of sign ownership thereof, user and to identify the ownership in a certain moment be unique, and our present situation is different therewith, user ID is shared in different network domains (CS/IMS), the terminal that the user can use its different access technologies that has according to its wish simultaneously or only insert among the CS/IMS one, and network need ensure as long as the user can reach in any one network domains, just can receive the calling of other users to it, perhaps two territories all can and situation under according to user intention or operation strategy is preferential selects a network domains to continue.Because the user is to change flexibly at the access situation of same area not and user intention or operation strategy, therefore present MNP also not exclusively is fit to solve this flexible strategies and controls routing decision problem.

Summary of the invention

In view of this, the purpose of this invention is to provide a kind of system and method for realizing route control, make it when terminal access to IMS that uses different access technologies or CS, can both receive the calling of other users according to predetermined strategy to it.

A kind of method of route control that realizes provided by the invention is achieved in that

A kind of method that realizes route control is applied to comprise in the route control procedure in IMS territory and CS territory that set in advance routing policy decision point RPDP, and routing policy information is set, this method also comprises in the routing policy decision point:

A. the routing decision query entity is inquired about current routing decision to the routing policy decision point;

B. the routing policy decision point is according to current routing policy information, and the routing decision relevant information of preserving in the CS/IMS territory is determined current routing decision information;

C. the routing policy decision point is returned determined current routing decision information to the routing decision query entity;

D. the routing decision query entity is finished follow-up route control according to this routing decision information.

The relevant information of routing decision described in the step B is that the routing policy decision point is inquired about from the HLR/HSS in CS/IMS territory and obtained.

Described routing policy decision point adopts the HLR/HSS inquiry routing decision relevant information of MAP from the CS/IMS territory, and, described routing decision relevant information is to adopt the operation of MAP Any Time Interrogation to obtain, or the operation of MAP Any Time Interrogation user contracting data obtains;

Perhaps, adopt Diameter to communicate between HSS and routing policy decision point, described routing decision relevant information is to adopt Diameter user data requests UDR/UDA operation, or Diameter user registration state inquiry UAR/UAA operation, or Diameter place information inquiry LIR/LIA operation realizes.

The relevant information of routing decision described in the step B is that the routing policy decision point is preserved in advance.

Before step B, further comprise:

HLR/HSS initiatively upgrades user's information relevant with routing decision in the CS/IMS territory that the routing policy decision point is preserved by HLR/HSS with interface between the routing policy decision point, and then described is that the user that self preserved of routing policy decision point is in the CS/IMS territory information relevant with routing decision from the routing decision relevant information among the HLR/HSS.

HLR/HSS and routing policy decision point interface adopt MAP to communicate alternately, and described routing decision relevant information is to operate realization by MAP location update operations, MAP insertion/deletion user,

Perhaps, adopt Diameter to communicate between HSS and routing policy decision point, the information that the user that described renewal routing policy decision point is preserved is relevant with routing decision in the CS/IMS territory adopts Diameter server to distribute the SAR/SAA operation, or Diameter upgrades user contracting data PPR/PPA operation, or Diameter booking reader's data change SNR/SNA and notice user data change PNR/PNA operation realize.

Described routing policy query entity is attaching position register HLR in the CS territory, gateway MSC GMSC or short message gateway MSC SMS-GMSC; Or be home subscribed services device HSS, service call conversation control function S-CSCF in the IMS territory.

When the described routing decision query entity of steps A is HLR/HSS, comprise further in the described routing decision query requests that RPDP carries out the relevant information of the required user of routing decision in the CS/IMS territory.

When described routing inquiry entity was HLR in the CS territory or GMSC, steps A comprised:

A11, CS territory GMSC receive the setup requests of calling, send routing inquiry request to HLR;

A12, HLR determine inquiry mode after receiving this routing inquiry request, if adopt direct inquiry mode, execution in step A13 then is if adopt GMSC inquiry mode, then execution in step A14;

A13, HLR directly send routing decision query requests, execution in step B then to RPDP;

A14, HLR return the routing inquiry response to GMSC, wherein contain called subscriber's callee side CAMEL Subscription Information (T-CSI); GMSC triggers callee side CAMEL business according to T-CSI after receiving this routing inquiry response, sends routing decision query requests IDP, execution in step B then to the RPDP as gsmSCF.

Inquiry mode is pre-configured described in the steps A 12, or one or more factors decisions in the local configuration information of the incoming call latching service state of the user's incoming call latching service that writes down in the tenability to CAMEL of in routing inquiry message, carrying according to GMSC, HLR, operator's decision, HLR.

When adopting direct inquiry mode in the steps A 12,, then further comprise the virtual roaming number that points to CS/IMS Interworking gateway MGCF among the step C in the current routing decision information if the current routing decision of determining is that IMS territory route continues;

Step D comprises:

After D11, HLR received the current routing decision information that the routing decision point returns, route continued if current routing decision is the CS territory, then execution in step D12; Continue if be defined as IMS territory route, then execution in step D13 according to routing decision;

D12, HLR send the request of Providing Roaming Number to the current place VMSC of called subscriber, and the roaming number that VMSC is returned in the response that Provides Roaming Number returns to GMSC in routing inquiry responds, GMSC routes the call to called place VMSC, process ends according to this roaming number;

D13, HLR return to GMSC with the virtual roaming number of the sensing CS/IMS Interworking gateway MGCF that RPDP provides in the routing inquiry response in current routing decision information, GMSC is according to described virtual roaming number, route the call to MGCF and continue process ends by the route that MGCF proceeds the IMS territory.

When adopting the GMSC inquiry mode in the steps A 12,, further comprise in the current routing decision information described in the step C: the redirection number that points to CS/IMS Interworking gateway MGCF if described current routing decision is an IMS territory route when continuing;

Then step D comprises:

After D21, GMSC received current routing decision information, route continued if current routing decision is the CS territory, execution in step D22 then, and route continues if current routing decision is the IMS territory, then execution in step D23;

D22, GMSC initiate to suppress the routing inquiry request of callee side CAMEL Subscription Information to HLR; After HLR receives this routing inquiry request, send the request of Providing Roaming Number to the current place VMSC of called subscriber, and the roaming number that VMSC is returned in the response that Provides Roaming Number returns to GMSC in routing inquiry responds, GMSC routes the call to called place VMSC, process ends in view of the above;

D23, GMSC route the call to MGCF and proceed route in the IMS territory, process ends by MGCF according to this redirection number.

When described routing inquiry entity was SMS-GMSC in the CS territory, steps A comprised:

After A21, SMS-GMSC receive the termination short message, to the HLR routing inquiry request that sends SMS message;

After A22, HLR receive this short message routing inquiry request, directly send the routing decision query requests to RPDP.

The current routing decision of determining among the step B is that IMS territory route continues or CS territory route continues; If continue, then further comprise address information from CS/IMS note Interworking gateway to HLR that return in the current routing decision information among the step C for IMS territory route;

Step D comprises:

After D31, HLR received the current routing decision information that the routing decision point returns, route continued if current routing decision is the CS territory, then execution in step D32; Continue if be defined as IMS territory route, then execution in step D33 according to routing decision;

D32, HLR return to SMS-GMSC with the VMSC address information in short message routing inquiry response, the SMS-GMSC short message that will terminate routes to called place VMSC, process ends;

The address information of D33, HLR return RPDP in current routing decision information CS/IMS note Interworking gateway returns to SMS-GMSC in the response of short message routing inquiry, the SMS-GMSC short message that will terminate routes to CS/IMS note Interworking gateway and proceeds intercommunication and in the short message route processing in IMS territory by CS/IMS note Interworking gateway.

When described routing inquiry entity was HSS in the IMS territory or S-CSCF, steps A comprised:

After A31, I-CSCF receive the IMS service request that mails to this territory user, send routing inquiry request to HSS;

A32, HSS judge inquiry mode, if determine to adopt direct inquiry mode to finish cross-domain route control, then execution in step A33 finishes cross-domain route control, then execution in step A34 if determine employing S-CSCF inquiry mode;

A33, HSS send routing decision query requests, execution in step B to RPDP;

A34, HSS return the routing inquiry response to I-CSCF, wherein contain to have for the S-CSCF domain name of called subscriber's distribution or by I-CSCF to finish the required S-CSCF Capability Requirement information of S-CSCF distribution;

After A35, I-CSCF receive this inquiry response, with the IMS service request transmit S-CSCF domain name correspondence that called subscriber most distributes or according to S-CSCF Capability Requirement information determine S-CSCF, S-CSCF carries out business according to the professional trigger data of the IMS in the user contracting data to be triggered, transmit the IMS service request as routing decision query requests, execution in step B to RPDP as AS.

Inquiry mode described in the steps A 32 is to judge according to the local configuration information of HSS, or

When comprising further in the routing inquiry request in the steps A 31 that I-CSCF expands the service attribute that carries and relevant information thereof in routing inquiry message, inquiry mode described in the steps A 32 is to judge according to service attribute and relevant information thereof that expansion in the local configuration information of HSS and/or the routing inquiry message is carried.

When steps A 32 determines to adopt direct inquiry mode to finish cross-domain route control,, then comprise in the current routing decision information described in the step C if the current routing decision of determining among the step B is that CS territory route continues: the domain name of CS/IMS Interworking gateway MGCF,

Step D comprises:

After D41, HSS received current routing decision information, route continued if current routing decision is the CS territory, and then execution in step D42 continues if be defined as IMS territory route according to routing decision, then execution in step D43;

D42, HSS return to I-CSCF as the S-CSCF domain name to the domain name of the CS/IMS Interworking gateway MGCF that it returns with RPDP in the routing inquiry response, I-CSCF is forwarded to the IMS service request MGCF that is considered as S-CSCF by it, and proceed route in the CS territory, process ends by MGCF;

D43, HSS are with the S-CSCF domain name or finish S-CSCF by I-CSCF and distribute required S-CSCF Capability Requirement information to return to I-CSCF in the routing inquiry response, I-CSCF is forwarded to the IMS service request S-CSCF that determines thus, and continue to finish the professional follow-up route that reaches at IMS that triggers of IMS by S-CSCF and control process ends.

Determine to adopt direct inquiry mode when steps A 32 and finish cross-domain route control, and the current routing decision of determining among the step B is that CS territory route continues, then comprise in the current routing decision information described in the step C: an E.164 number that points to CS/IMS Interworking gateway MGCF

Then step D comprises:

After D51, HSS received current routing decision information, route continued if current routing decision is the CS territory, then execution in step D52;

D52, HSS are inserted into the E.164 number that points to CS/IMS Interworking gateway MGCF in the routing decision information on the AS that will be triggered in this Business Processing of user by the updating user data operation, simultaneously, HSS is with the S-CSCF domain name or finish S-CSCF by I-CSCF and distribute required S-CSCF Capability Requirement information to return to I-CSCF in the routing inquiry response; I-CSCF is forwarded to the S-CSCF that determines thus with the IMS service request, and S-CSCF carries out the professional triggering of IMS, and under above-mentioned AS control the IMS service request is routed to MGCF through BGCF, and is proceeded to control process ends in the route in CS territory by MGCF.

When steps A 32 determines to adopt the S-CSCF inquiry modes to finish cross-domain route control,

If the current routing decision of determining among the step B is that CS territory route continues, comprise in the current routing decision information described in the step C: an E.164 number that points to CS/IMS Interworking gateway MGCF, then step C routing policy decision point comprises to the step that the routing decision query entity is returned determined current routing decision information: the routing policy decision point will be unified finger URL from the request as the IMS service request of routing decision query requests that S-CSCF receives and be revised as the E.164 number that points to CS/IMS Interworking gateway MGCF, and send the IMS service request to S-CSCF;

If the current routing decision of determining among the step B is that CS territory route continues, then step C routing policy decision point comprises to the step that the routing decision query entity is returned determined current routing decision information: the routing policy decision point is not unified finger URL to the request as the IMS service request of routing decision query requests of receiving from S-CSCF and is made amendment, and sends the IMS service request to S-CSCF.

Step D comprises:

After D61, S-CSCF received current routing decision information, route continued if current routing decision is the CS territory, and then execution in step D62 continues if be defined as IMS territory route according to routing decision, then execution in step D63;

Amended request unifies to point in the finger URL the E.164 number of CS/IMS Interworking gateway MGCF in the IMS service request that D62, S-CSCF return according to the RPDP as AS, and the IMS service request is routed to MGCF and proceeds route in the CS territory by MGCF through BGCF;

The request of not making an amendment in the IMS service request that D63, S-CSCF return according to the RPDP as AS is unified finger URL and is continued to finish that follow-up IMS is professional triggers and in the route of after this proceeding at IMS.

A kind of system of route control that realizes provided by the invention is achieved in that

A kind of system that realizes route control comprises: HSS/HLR, routing policy decision point RPDP and route controlled entity, and wherein, HSS/HLR links to each other with the route controlled entity with RPDP,

HSS/HLR is used to preserve IMS/CS user contracting data and user's current state/positional information, and the user profile in IMS/CS territory is provided for RPDP; Routing inquiry request according to the route controlled entity is directly obtained current routing decision information from RPDP, and its routing iinformation of determining according to this routing decision information offered the route controlled entity, or return the routing inquiry object information to the route controlled entity according to user contracting data and user's current state/positional information;

RPDP, when receiving the routing decision query requests of route controlled entity or HSS/HLR, utilize the current routing policy and the called user information among the HSS/HLR of self preserving to determine current routing decision information, and described current routing decision information is returned to route controlled entity or HSS/HLR;

The route controlled entity is used for sending routing inquiry request to HSS/HLR, and/or, send the routing decision query requests to RPDP, and the current routing decision information that the routing inquiry object information that returns according to HSS/HLR or RPDP return is carried out route control.

Described route controlled entity is the CSCF in GMSC or IMS territory.

Described RPDP further comprises the interface with OSS OSS, is used to receive the operator of operator operation signal, and the policy information of self preserving is increased, deletes, inquires about, preserves and revises.

Described RPDP further comprises the interface with the user, is used to receive user's operation signal, and the policy information of self preserving is increased, deletes, inquires about, preserves and revises.

After described HSS/HLR receives the routing inquiry request of route controlled entity, be further used for determining inquiry mode, if direct inquiry mode, then directly obtain current routing decision information and its routing iinformation of determining according to routing decision information is offered the route controlled entity from RPDP, otherwise, then return the routing inquiry object information to the route controlled entity according to user contracting data and user's current state/positional information.

Described inquiry mode sets in advance, or one or more factors decisions to the tenability of CAMEL or in the local configuration information of the incoming call latching service state of user's incoming call latching service of storing among the type of service of the IMS service request of carrying in by query messages and relevant information or the HLR/HSS, operator decision or HLR/HSS of in routing inquiry message, carrying according to the routing decision query entity.

When described route controlled entity is further used for, in mailing to the routing inquiry message of HSS, expand the service attribute and the relevant information thereof of carrying the IMS service request of being received, select foundation for HSS as the routing decision inquiry mode.

When described route controlled entity was GMSC, GMSC linked to each other with RPDP, therebetween by the CAMEL Application Part interface communication,

GMSC is further used for: the CAMEL Subscription Information that provides in the routing inquiry object information according to HLR triggers callee side CAMEL business, and sends the routing decision query requests with this to RPDP, and the current routing decision information of determining according to RPDP is carried out route again;

When described route controlled entity was CSCF, described CSCF further comprised inquiry CSCF and serving CSCF, and serving CSCF links to each other with RPDP, therebetween by the Session Initiation Protocol interface communication,

Inquiry CSCF is further used for: according to serving CSCF domain name or the required serving CSCF Capability Requirement information of distribution services CSCF that HLR provides in the routing inquiry object information, determine serving CSCF, and the IMS service request is routed to this serving CSCF;

Serving CSCF is further used for: trigger IMS callee side business according to the IMS Service Trigger Information in the user contracting data, and send the routing decision query requests with this to RPDP, the current routing decision information of determining according to RPDP is carried out route again.

HLR/HSS and RPDP adopt MAP to communicate, and/or, adopt the Dimeter agreement to communicate between HSS and RPDP.

The another kind of system of route control that realizes provided by the invention comprises: the SMS-GMSC in HLR, routing policy decision point RPDP and the CS territory, and wherein, HLR links to each other with RPDP with SMS-GMSC respectively, wherein,

SMS-GMSC, behind the termination short message that receives from the Mobile-Originated Short Message side, to the HLR routing inquiry request that sends SMS message, and the routing iinformation that returns according to HLR, route should termination short message;

HLR according to the short message routing inquiry request that receives, sends the routing decision query requests to RPDP, and according to determining from the routing decision information of RPDP and returning routing iinformation to SMS-GMSC;

RPDP is used for the routing decision query requests according to HLR, utilizes the current routing policy and the called user information in the CS/IMS territory of self preserving to determine current routing decision information, and described current routing decision information is returned to HLR.

Described HLR returns the address information of routing iinformation for sensing CS/IMS note Interworking gateway to SMS-GMSC, or, the VMSC address information at the current place of user.

The invention provides a kind of when the user selects to use the terminal access to IMS of different access technologies or CS, according to certain strategy and user same area not whether can and etc. situation determine the cross-domain route control system and the method for its enhancing of the route that continues during called in all available business as CS/IMS.

By the present invention, can be so that under different network application environments, all can realize cross-domain route control as required, and provide cross-domain route control for the short message service of circuit domain extensive use, improve user's business impression, further promoted the application of CS, WLAN and IMS network.

Description of drawings

Fig. 1 strides the schematic flow sheet of the method for route control for the present invention's realization

The system architecture schematic diagram that Fig. 2 a proposes for the present invention;

Fig. 2 b strides the networking embodiment schematic diagram of the system of route control for the present invention's realization;

Fig. 3 is the schematic flow sheet of the embodiment one of realization the inventive method;

Fig. 4 is the schematic flow sheet of the embodiment two of realization the inventive method;

Fig. 5 is the schematic flow sheet of the embodiment three of realization the inventive method;

Fig. 6 is the schematic flow sheet of the embodiment four of realization the inventive method;

Fig. 7 is the schematic flow sheet of the embodiment five of realization the inventive method;

Fig. 8 is based on another concrete networking schematic diagram of method of the present invention;

Fig. 9 is for realizing the schematic flow sheet of the embodiment of the inventive method based on Fig. 8.

Embodiment

The main thought of the inventive method is: set in advance the routing policy decision point, and in the routing policy decision point routing policy information is set, the routing decision query entity is inquired about current routing decision to the routing policy decision point; The routing policy decision point is according to current routing policy information, and the routing decision relevant information of preserving in the CS/IMS territory is determined current routing decision information; Return determined current routing decision information by policy decision point to the routing decision query entity; The routing decision query entity is finished follow-up route control according to this routing decision.

Referring to shown in Figure 1, the present invention realizes that the method for striding route control may further comprise the steps:

Step 101: the routing decision query entity is inquired about current routing decision to the routing policy decision point.

Step 102: the routing policy decision point is determined current routing decision according to current routing policy information and the routing decision relevant information that obtains from HLR/HSS.

And the mode of determining current routing policy can comprise multiple, and the present invention here also limits it, and below only illustrates certain mode that it determines strategy.Such as, when the user only can be timely at IMS or territory of CS, all be chosen in this user for all callings and can reach the territory and continue; When the user all can be timely at CS/IMS, can continue according to network domains with the calling same type, can be according to factors such as user/network settings or binding times with CS or IMS preferential replay, also can not consider current the reached state of user, force to continue at CS or IMS according to factors such as user/network settings or binding times in two territories.

Step 103: the routing policy decision point is returned determined current routing decision information to the routing decision query entity.

Step 104: the routing decision query entity is finished follow-up route control according to this routing decision information.

Above-mentioned routing policy query entity is the entity that can directly obtain routing decision information from the routing policy decision point.Therefore, the routing policy query entity can be the HLR/HSS in the CS/IMS territory, or the route controlled entity in the CS/IMS territory, be CSCF (comprising inquiry CSCF and serving CSCF) as the route controlled entity in the IMS territory, the route controlled entity is GMSC or SMS-GMSC etc. in the CS territory.

When if the routing policy query entity is HLR or HSS, that is: after HLR/HSS receives the routing inquiry message of network node, directly send the routing decision query requests to the routing policy decision point, thereby obtain the called routing decision information that routing decision point is determined, the present invention is called direct inquiry mode with the mode of this inquiry routing decision, correspondingly, other inquiry mode is called non-direct inquiry mode, send the routing decision query requests at the heterogeneous networks entity, also can have another name called is GMSC, SMS-GMSC or CSCF inquiry mode.

For non-direct inquiry mode, its routing inquiry is achieved in that network entities such as GMSC, SMS-GMSC or CSCF send routing inquiry request to HLR, after HLR receives this routing inquiry request, sends the routing inquiry response to this network entity; After network entity is received this response, send the routing decision query requests, acquire routing decision information from RPDP to RPDP.

In addition, the present invention can also support above-mentioned two kinds of inquiry modes simultaneously.Concretism is: after HLR/HSS receives the routing inquiry request of route controlled entity transmission, judge and adopt which kind of inquiry mode, if adopt direct inquiry mode, then directly send the routing decision query requests to RPDP, from RPDP, obtain routing decision information, to send to the route controlled entity according to the routing iinformation that routing decision information is determined again, this route controlled entity carries out route control in view of the above; If adopt non-direct inquiry mode, then send the routing inquiry response and return the routing inquiry object information to the route controlled entity of initiating routing inquiry, directly inquire about by it to RPDP, this routing inquiry node obtains routing decision information again from RPDP, carry out route according to this routing decision information then and continue.And, if between route controlled entity and the RPDP is being connected of setting up in advance, can directly communicate by the connection of setting up in advance this moment, also can be that the route controlled entity triggers the CAMEL business according to the CAMEL user signing contract information that comprises in the inquiry response, or according to IMS territory Service Trigger Information triggering IMS business, and then foundation is connected with the business of RPDP, realizes and the communicating by letter of RPDP; Also can be to communicate by other wired or wireless modes.

Fig. 2 the present invention is directed to the above-mentioned system architecture of supporting that simultaneously above-mentioned two kinds of inquiry modes propose.

Shown in Fig. 2 a, system of the present invention comprises HSS/HLR, RPDP and route controlled entity.Wherein, RPDP links to each other with route controlled entity and HSS/HLR that needs carry out the routing decision inquiry, and the route controlled entity links to each other with HSS/HLR.And when the route controlled entity was CSCF, RPDP linked to each other with serving CSCF (S-CSCF) among the CSCF.

HSS/HLR is used to preserve IMS/CS user contracting data and user's current state information, for RPDP provides described IMS/CS the user profile in territory; And according to the routing inquiry request of route controlled entity, judge inquiry mode, directly obtain current routing decision information and its routing iinformation of determining according to routing decision information is offered the route controlled entity according to inquiry mode from RPDP, or return the routing inquiry object information, directly remove to inquire about RPDP by the route controlled entity.

RPDP, when receiving the routing decision query requests of route controlled entity or HSS/HLR, utilize the current routing policy and the called user information among the HSS/HLR of self preserving to determine current routing decision information, and described current routing decision information is returned to route controlled entity or HSS/HLR.RPDP can realize in a physical entity, under the situation of the combination of supporting various functions, also can be realized by different physical entity combinations.

The route controlled entity is used for sending routing inquiry request to HSS/HLR; And when needs are directly inquired about RPDP by it,, send the routing decision query requests, or directly receive the routing iinformation that HLR/HSS determines according to routing decision information to RPDP by the connection of having set up; The routing iinformation that current routing decision information that last basis is received or HLR/HSS determine according to routing decision information carries out route control.

Certainly, if not being connected between RPDP and route controlled entity set up, then further, the route controlled entity can trigger callee side CAMEL business according to the CAMEL Subscription Information that HSS/HLR provides, or the IMS territory Service Trigger Information that provides according to HSS triggers the IMS business, sets up and being connected of RPDP.

And, HLR adopts the basis for estimation of which kind of inquiry mode to be: the mode of making an appointment, or one or more information are determined in the local configuration information of the incoming call latching service state of the user's incoming call latching service to the tenability of CAMEL or HLR local record that carries in routing inquiry message of route controlled entity GMSC, operator's decision or HLR.

Judgement by this inquiry mode, under the situation that route controlled entity GMSC does not support the incoming call latching service of the current incoming call locking that activation arranged of the network condition of CAMEL or user or network operator's decision thereby original service logic relation and CAMEL business clash according to CS, directly finish the routing decision inquiry, the cross-domain route controlling schemes of CS/IMS under the above-mentioned situation is provided by HLR.

HSS adopts the basis for estimation of which kind of inquiry mode to be: the mode of making an appointment, or I-CSCF expands in routing inquiry message, and one or more are determined in the local configuration information of the service attribute that carries and relevant information and HSS.

Judgement by this inquiry mode, for the IMS service request that need carry out different disposal according to specifying information in the service request, the S-CSCF inquiry mode can be adopted, thereby the demand of cross-domain route control can be realized carrying out based on calling attribute (service request type).

Fig. 2 b is depicted as a specific embodiment realizing system of the present invention.The network configuration that this embodiment provides comprises HSS, HLR, RPDP, GMSC, SMS-GMSC, I-CSCF/S-CSCF/AS.RPDP comprises RPDP service logic, gsmSCF, STP, AS logic function module.The RPDP service logic, be used to store routing policy, carry out logic determines and and HLR and HSS between carry out data forwarding; GsmSCF is used for setting up the CAMEL business with GMSC and is connected, and the CAMEL Application Part Signalling exchange between realization and GMSC; STP is used for connecting with GMSC, the MAP Signalling exchange between realization and GMSC; X-CSCF comprises I-CSCF and S-CSCF, and the Mw based on Session Initiation Protocol with the IMS standard links to each other each other, and the AS among the RPDP realizes being connected with the signaling of S-CSCF among the X-CSCF, the SIP Signalling exchange between realization and the S-CSCF.

Wherein, HSS links to each other with the RPDP service logic by interface 8, links to each other with I-CSCF among the X-CSCF by interface 7, links to each other with other AS by interface 10; HLR links to each other with the RPDP service logic by interface 6, links to each other with STP among the RPDP by interface 3b, links to each other with SMS-GMSC by interface 12, links to each other with GMSC by interface 4; STP among the RPDP links to each other with GMSC by interface 3a, and the gsmSCF among the RPDP links to each other with GMSC by interface 5, and the AS among the RPDP links to each other with S-CSCF by interface 9; S-CSCF links to each other with other AS by interface 11.Simultaneously, the RPDP service logic provides interface 13 to OSS, provides interface 14 to the user.The termination short message that SMS-GMSC receives from the CS territory by interface 3, the setup requests that GMSC receives from the CS territory by interface 1, the IMS service request that I-CSCF receives from the IMS territory by interface 2.

Describe technical scheme of the present invention in detail below in conjunction with the drawings and specific embodiments.

Because present routing mode can be CS territory or IMS territory, call/session for the CS/IMS territory, the routing policy decision point finally can be determined in CS territory route, also can determine in IMS territory route, in following each embodiment, all represented the processing under these two kinds of different situations, simultaneously, in order to narrate conveniently, adopt routing decision 1 and routing decision 2 to distinguish both of these case.

Referring to Fig. 2 and Fig. 3, the call request for the CS territory is described, HLR judges the process that adopts GMSC inquiry routing decision mode to finish cross-domain route control.The idiographic flow of present embodiment is as follows:

After the GMSC in step 301:CS territory receives the setup requests of calling by interface 1, send routing inquiry request to HLR by interface 4.

After step 302～303:HLR receives this routing inquiry request, one or more factors during the incoming call latching service state of the tenability to CAMEL of carrying in routing inquiry message according to GMSC, user's incoming call latching service of local record and/or operator's decision and this locality of HLR are provided with, judge that decision employing GMSC inquires about the routing decision mode and finishes cross-domain route control, therefore return the routing inquiry response by interface 4 to GMSC, wherein contain called subscriber's callee side CAMEL Subscription Information (T-CSI).

Step 304～305:GMSC triggers callee side CAMEL business according to T-CSI after receiving this routing inquiry response, sets up professional the connection with RPDP, and sends routing decision query requests (IDP) by interface 5 to the RPDP as gsmSCF.

Step 306～308: after receiving this routing decision query requests (IDP) as the RPDP of gsmSCF, pass through interface 6 and interface 8 alternatively according to current routing policy needs, with HLR and HSS interactive query user relevant information, determine routing decision respectively according to relevant information and current strategies that inquiry obtains at CS and IMS.

Step 309～310: when institute's routing decision (being referred to as routing decision 1 among the figure) for the time definitely, send the CONNECT message to GMSC by interface 5, wherein contain the redirection number that points to CS/IMS Interworking gateway MGCF as the RPDP of gsmSCF in the IMS route; GMSC carries out routing decision 1 according to this redirection number, routes the call to MGCF and proceeds route in the IMS territory, process ends by MGCF.

Step 311～317: when routing decision is (being referred to as routing decision 2 among the figure) when continuing in the CS route, RPDP as gsmSCF sends CONTINUE message indication GMSC continuation according to original called number route by interface 5, GMSC carries out routing decision 2 in view of the above, initiates to suppress the callee side CAMEL Subscription Information routing inquiry request of (suppressing T-CSI) by interface 4 to HLR; After HLR receives this routing inquiry request, send the request of Providing Roaming Number to the current place VMSC of called subscriber, and with VMSC roaming number of returning in the response that Provides Roaming Number, the routing inquiry response of returning by interface 4 returns to GMSC, and GMSC routes the call to called place VMSC in view of the above.

Below in conjunction with Fig. 2 and shown in Figure 4, the call request for the CS territory is described, the HLR judgement is adopted and is directly inquired about the schematic flow sheet that the routing decision mode is finished route control.

Referring to shown in Figure 4, the concrete processing procedure of present embodiment is as follows:

After step 400～401:CS territory GMSC receives the setup requests of calling by interface 1, send routing inquiry request to HLR by interface 4.

One or more factors during the incoming call latching service state of user's incoming call latching service of the tenability to CAMEL that step 402～403:HLR carries in routing inquiry message according to GMSC, local record, operator's decision, this locality of HLR are provided with, judge to determine the direct inquiry of employing routing decision mode to finish cross-domain route control, so pass through interface 6 directly to RPDP transmission routing decision query requests.

After step 404～407:RPDP receives this routing decision query requests, according to current routing policy needs alternatively respectively by interface 6 and interface 8 and HLR and HSS interactive query user relevant information at CS and IMS, the relevant information that obtains according to inquiry and current strategies is determined and return routing decision by interface 6 to HLR.

Step 408～410: when institute's routing decision (being referred to as routing decision 1 among the figure) for the time definitely in the IMS route, HLR returns RPDP to the virtual roaming number that points to CS/IMS Interworking gateway MGCF to it and return to GMSC in the routing inquiry response, GMSC carries out routing decision 1 in view of the above, route the call to MGCF and proceed route in the IMS territory, process ends by MGCF.

Step 411～415: when routing decision is (being referred to as routing decision 2 among the figure) when continuing in the CS route, HLR continues to send the request of Providing Roaming Number in the indication of CS route to the current place VMSC of called subscriber according to RPDP, and the roaming number that VMSC is returned in the response that Provides Roaming Number returns to GMSC in routing inquiry responds, GMSC carries out routing decision 2 in view of the above, routes the call to called place VMSC.

Fig. 5 is the service connection request for the IMS territory, and HSS judges the schematic flow sheet that adopts S-CSCF inquiry routing decision mode to finish cross-domain route control.

Referring to shown in Figure 5, the detailed process of present embodiment is as follows:

Step 501:IMS territory I-CSCF receives the IMS service request that mails to this territory user, sends routing inquiry request to HSS, and optionally, I-CSCF can expand the service attribute and the relevant information thereof of carrying in routing inquiry message.

Step 502～503:HSS expands the service attribute and the relevant information thereof of carrying according to I-CSCF in routing inquiry message, and/or, factors such as this locality of HSS is provided with judge that decision employing S-CSCF inquires about the routing decision mode and finishes cross-domain route control, therefore are returned as the S-CSCF domain name of called subscriber's distribution or finish the required S-CSCF Capability Requirement information of S-CSCF distribution by I-CSCF to I-CSCF in the routing inquiry response of returning.

Step 504～506:I-CSCF determines in view of the above and the IMS service request is transmitted the most S-CSCF of user's distribution, S-CSCF carries out business according to the professional trigger data of the IMS in the user contracting data to be triggered, and sends routing decision query requests (the IMS service request of forwarding) to the RPDP as AS.

Step 507～509: after receiving this routing decision query requests as the RPDP of AS, according to current routing policy needs alternatively respectively with HLR and HSS interactive query user relevant information at CS and IMS, and the information and the current strategies of carrying in relevant information that obtains according to inquiry and/or the S-CSCF routing decision query requests (the IMS service request of forwarding) are determined routing decision.

Step 510～511: when institute's routing decision (being referred to as routing decision 1 among the figure) for the time definitely in the CS route, unifying finger URL as the request of RPDP modification in the IMS service request that S-CSCF returns of AS is an E.164 number that points to CS/IMS Interworking gateway MGCF, S-CSCF carries out routing decision 1 in view of the above, and the IMS service request is routed to MGCF and proceeds route in the CS territory by MGCF through BGCF.

Step 512～513: when routing decision is (being referred to as routing decision 2 among the figure) when continuing in the IMS route, request in the IMS service request of returning as the RPDP subtend S-CSCF of AS is unified finger URL and is not made an amendment, S-CSCF carries out routing decision 2 in view of the above, continues to finish that follow-up IMS is professional triggers and after this IMS service request is routed to the P-CSCF that the user inserts.

Figure 6 shows that the IMS calling, HSS judges that adopting direct inquiry routing decision mode to finish cross-domain route controls the schematic flow sheet of control mode one.

Step 601:IMS territory I-CSCF receives the IMS service request that mails to this territory user, sends routing inquiry request to HSS, and optionally, I-CSCF can expand the service attribute and the relevant information thereof of carrying in routing inquiry message.

Step 602～603:HSS expands the service attribute and the relevant information thereof of carrying according to I-CSCF in routing inquiry message, and/or, factors such as this locality of HSS is provided with judge that determining employing directly to inquire about the routing decision mode finishes cross-domain route control, so to RPDP transmission routing decision query requests.

After step 604～607: step RPDP receives this routing decision query requests, according to current routing policy needs alternatively respectively with HLR and HSS interactive query user relevant information at CS and IMS, and the relevant information that obtains according to inquiry and current strategies are determined and are returned routing decision to HSS.

Step 608～610: when institute's routing decision (being referred to as routing decision 1 among the figure) for the time definitely in the CS route, RPDP returns the domain name of a CS/IMS Interworking gateway MGCF to HSS, HSS returns to I-CSCF as the S-CSCF domain name with it in the routing inquiry response, I-CSCF carries out routing decision 1 in view of the above, the IMS service request is forwarded to the MGCF that is considered as S-CSCF by it, and proceeds route in the CS territory by MGCF.

Step 611～613: when routing decision is (being referred to as routing decision 2 among the figure) when continuing in the IMS route, RPDP returns corresponding indication to HSS, HSS returns to I-CSCF with the S-CSCF domain name in view of the above in the routing inquiry response, I-CSCF carries out routing decision 2 in view of the above, the IMS service request is forwarded to S-CSCF, and continues to finish that IMS is professional triggers and route the call to after this P-CSCF that the user inserts by S-CSCF.

Fig. 7 is the IMS calling, and HSS judges that adopting direct inquiry routing decision mode to finish cross-domain route controls the schematic flow sheet of control mode two.Present embodiment and the difference of a last embodiment mainly are different when the executive mode of routing decision.

Referring to shown in Figure 7, the concrete processing procedure of present embodiment is as follows:

Step 701:IMS territory I-CSCF receives the IMS service request that mails to this territory user, sends routing inquiry request to HSS, and optionally, I-CSCF can expand the service attribute and the relevant information thereof of carrying in routing inquiry message.

Step 702～703:HSS expands the service attribute and the relevant information thereof of carrying according to I-CSCF in routing inquiry message, and/or, factors such as this locality of HSS is provided with judge that determining employing directly to inquire about the routing decision mode finishes cross-domain route control, so to RPDP transmission routing decision query requests.

After step 704～706:RPDP receives this routing decision query requests, according to current routing policy needs alternatively respectively with HLR and HSS interactive query user relevant information at CS and IMS, and determine routing decision according to relevant information and current strategies that inquiry obtains.

Step 707～713:RPDP returns determined routing decision information to HSS, when institute's routing decision (being referred to as routing decision 1 among the figure) for the time definitely in the CS route, comprise an E.164 number that points to CS/IMS Interworking gateway MGCF in this routing decision information, HSS is inserted into it on AS that will be triggered in this Business Processing of user by the updating user data operation, simultaneously, no matter the routing decision of being done is in CS route or IMS route, HSS returns to I-CSCF with the S-CSCF domain name in the routing inquiry response, I-CSCF is forwarded to S-CSCF with the IMS service request in view of the above, S-CSCF carries out that IMS is professional to be triggered, and is triggered to HSS inserts data in the CS route time at routing decision AS.

Step 714～716: when institute's routing decision (being referred to as routing decision 1 among the figure) for the time definitely in the CS route, after S-CSCF carries out the professional triggering of IMS, AS unifies the E.164 number that finger URL is revised as described sensing CS/IMS Interworking gateway MGCF according to the data that HSS inserts with the request in the service request, and this service request returned to S-CSCF, S-CSCF under above-mentioned AS control according to AS the request in the amended service request unify finger URL the IMS service request routed to MGCF through BGCF, and proceed route in the CS territory by MGCF.

Step 717～719: when routing decision is (being referred to as routing decision 2 among the figure) when continuing in the IMS route, after S-CSCF carries out the professional triggering of IMS, the data conditions that AS inserts according to HSS is unified finger URL to the request in the service request and is not made an amendment, and this service request returned to S-CSCF, S-CSCF continues in view of the above to finish that IMS is professional triggers and route the call to after this P-CSCF that the user inserts.

In addition, Fig. 8 is the concrete networking schematic diagram of method based on the invention described above.

Referring to shown in Figure 8, the group-network construction of present embodiment comprises: comprising: the SMS-GMSC in HLR, routing policy decision point RPDP and the CS territory, wherein, HLR links to each other with RPDP with SMS-GMSC respectively.

SMS-GMSC is behind the termination short message that receives from the Mobile-Originated Short Message side, to the HLR routing inquiry request that sends SMS message.HLR is used for sending the routing decision query requests according to the short message routing inquiry request that receives to RPDP, and will be according to determining from the routing decision information of RPDP and returning routing iinformation to SMS-GMSC.RPDP is used for the routing decision query requests according to HLR, utilizes the current routing policy and the called user information in the CS/IMS territory of self preserving to determine current routing decision information, and described current routing decision information is returned to HLR.And HLR returns routing iinformation to SMS-GMSC can be for pointing to the address information or the current place of the user VMSC address information of CS/IMS note Interworking gateway.

Fig. 9 is the circuit domain short message, and HLR inquiry routing decision is finished the schematic flow sheet of cross-domain route control.

Referring to shown in Figure 9, the detailed process of present embodiment is as follows:

Step 901:CS territory Gateway MSC For Short Message Service SMS-GMSC receives the termination short message, to the HLR routing inquiry request that sends SMS message.

Step 902:HLR directly sends the routing decision query requests to RPDP;

After step 903～906:RPDP receives this routing decision query requests, according to current routing policy needs alternatively respectively with HLR and HSS interactive query user relevant information at CS and IMS, and the relevant information that obtains according to inquiry and current strategies are determined and are returned current routing decision to HLR.

Step 907～909: when institute definitely routing decision be (routing decision 1) during in the IMS route, RPDP returns the address information of pointing to CS/IMS note Interworking gateway to HLR, HLR returns to SMS-GMSC with it in the response of short message routing inquiry, SMS-GMSC carries out routing decision 1 in view of the above, the termination short message is routed to CS/IMS note Interworking gateway and is proceeded intercommunication and is handled in the short message route in IMS territory by CS/IMS note Interworking gateway.

Step 910～912: when routing decision is (routing decision 2) when continuing in the CS route, RPDP indication HLR continues in the CS route, HLR returns to SMS-GMSC with the VMSC address information in view of the above in the response of short message routing inquiry, SMS-GMSC carries out routing decision 2 in view of the above, and the short message that will terminate routes to called place VMSC.

The invention provides a kind of when the user selects to use the terminal access to IMS of different access technologies or CS, according to certain strategy and user same area not whether can and etc. situation determine the cross-domain route control system and the method for its enhancing of the route that continues during called in all available business as CS/IMS, this system and method has considered to adapt to the demand of different network application environments, and to the demand of the cross-domain route control of CS/IMS other types service request.

Claims

1, a kind of method that realizes route control, be applied to comprise in the route control procedure in IMS territory and CS territory, it is characterized in that, set in advance routing policy decision point RPDP, and routing policy information is set in the routing policy decision point, this method is further comprising the steps of:

2, method according to claim 1 is characterized in that, the relevant information of routing decision described in the step B is that the routing policy decision point is inquired about from the HLR/HSS in CS/IMS territory and obtained.

3, method according to claim 2, it is characterized in that, described routing policy decision point adopts the HLR/HSS inquiry routing decision relevant information of MAP from the CS/IMS territory, and, described routing decision relevant information is to adopt the operation of MAP Any Time Interrogation to obtain, or the operation of MAP Any Time Interrogation user contracting data obtains;

4, method according to claim 1 is characterized in that, the relevant information of routing decision described in the step B is that the routing policy decision point is preserved in advance.

5, method according to claim 4 is characterized in that, further comprises before step B:

6, method according to claim 5, it is characterized in that HLR/HSS and routing policy decision point interface adopt MAP to communicate alternately, and, described routing decision relevant information is to operate realization by MAP location update operations, MAP insertion/deletion user

7, method according to claim 1 is characterized in that, described routing policy query entity is attaching position register HLR in the CS territory, gateway MSC GMSC or short message gateway MSC SMS-GMSC; Or be home subscribed services device HSS, service call conversation control function S-CSCF in the IMS territory.

8, method according to claim 2 is characterized in that, when the described routing decision query entity of steps A is HLR/HSS, comprises further in the described routing decision query requests that RPDP carries out the relevant information of the required user of routing decision in the CS/IMS territory.

9, method according to claim 1 is characterized in that, when described routing inquiry entity was HLR in the CS territory or GMSC, steps A comprised:

10, method according to claim 9, it is characterized in that, inquiry mode is pre-configured described in the steps A 12, or one or more factors decisions in the local configuration information of the incoming call latching service state of the user's incoming call latching service that writes down in the tenability to CAMEL of in routing inquiry message, carrying according to GMSC, HLR, operator's decision, HLR.

11, method according to claim 9, it is characterized in that, when adopting direct inquiry mode in the steps A 12, if the current routing decision of determining is that IMS territory route continues, then further comprise the virtual roaming number that points to CS/IMS Interworking gateway MGCF among the step C in the current routing decision information;

Step D comprises:

12, method according to claim 9, it is characterized in that, when adopting the GMSC inquiry mode in the steps A 12, if described current routing decision is an IMS territory route when continuing, further comprise in the current routing decision information described in the step C: the redirection number that points to CS/IMS Interworking gateway MGCF;

Then step D comprises:

13, method according to claim 1 is characterized in that, when described routing inquiry entity was SMS-GMSC in the CS territory, steps A comprised:

14, method according to claim 13 is characterized in that, the current routing decision of determining among the step B is that IMS territory route continues or CS territory route continues; If continue, then further comprise address information from CS/IMS note Interworking gateway to HLR that return in the current routing decision information among the step C for IMS territory route;

Step D comprises:

15, method according to claim 1 is characterized in that, when described routing inquiry entity was HSS in the IMS territory or S-CSCF, steps A comprised:

A33, HSS send routing decision query requests, execution in step B to RPDP;

16, method according to claim 15 is characterized in that,

17, method according to claim 15, it is characterized in that, when steps A 32 determines to adopt direct inquiry mode to finish cross-domain route control, if the current routing decision of determining among the step B is that CS territory route continues, then comprise in the current routing decision information described in the step C: the domain name of CS/IMS Interworking gateway MGCF

Step D comprises:

18, method according to claim 15, it is characterized in that, determine to adopt direct inquiry mode when steps A 32 and finish cross-domain route control, and the current routing decision of determining among the step B is that CS territory route continues, then comprise in the current routing decision information described in the step C: an E.164 number that points to CS/IMS Interworking gateway MGCF

Then step D comprises:

19, method according to claim 15 is characterized in that, when steps A 32 determines to adopt the S-CSCF inquiry modes to finish cross-domain route control,

20, method according to claim 19 is characterized in that, step D comprises:

21, a kind of system that realizes route control is characterized in that, comprising: HSS/HLR, routing policy decision point RPDP and route controlled entity, and wherein, HSS/HLR links to each other with the route controlled entity with RPDP,

22, system according to claim 21 is characterized in that, described route controlled entity is the CSCF in GMSC or IMS territory.

23, system according to claim 21, it is characterized in that, described RPDP further comprises the interface with OSS OSS, is used to receive the operator of operator operation signal, and the policy information of self preserving is increased, deletes, inquires about, preserves and revises.

24, system according to claim 21 is characterized in that, described RPDP further comprises the interface with the user, is used to receive user's operation signal, and the policy information of self preserving is increased, deletes, inquires about, preserves and revises.

25, system according to claim 21, it is characterized in that, after described HSS/HLR receives the routing inquiry request of route controlled entity, be further used for determining inquiry mode, if direct inquiry mode, then directly obtain current routing decision information and its routing iinformation of determining according to routing decision information is offered the route controlled entity from RPDP, otherwise, then return the routing inquiry object information to the route controlled entity according to user contracting data and user's current state/positional information.

26, system according to claim 21, it is characterized in that, described inquiry mode sets in advance, or one or more factors decisions to the tenability of CAMEL or in the local configuration information of the incoming call latching service state of user's incoming call latching service of storing among the type of service of the IMS service request of carrying in by query messages and relevant information or the HLR/HSS, operator decision or HLR/HSS of in routing inquiry message, carrying according to the routing decision query entity.

27, system according to claim 26, it is characterized in that, when described route controlled entity is further used for, in mailing to the routing inquiry message of HSS, expand the service attribute and the relevant information thereof of carrying the IMS service request of being received, select foundation for HSS as the routing decision inquiry mode.

28, system according to claim 21 is characterized in that, when described route controlled entity was GMSC, GMSC linked to each other with RPDP, therebetween by the CAMEL Application Part interface communication,

GMSC is further used for: the CAMEL Subscription Information that provides in the routing inquiry object information according to HLR triggers callee side CAMEL business, and sends the routing decision query requests with this to RPDP, and the current routing decision information of determining according to RPDP is carried out route again.

29, system according to claim 21 is characterized in that, when described route controlled entity was CSCF, described CSCF further comprised inquiry CSCF and serving CSCF, and serving CSCF links to each other with RPDP, therebetween by the Session Initiation Protocol interface communication,

30, system according to claim 21 is characterized in that, HLR/HSS and RPDP adopt MAP to communicate, and/or, adopt Diameter to communicate between HSS and RPDP.

31, a kind of system that realizes route control is characterized in that, comprising: the SMS-GMSC in HLR, routing policy decision point RPDP and the CS territory, and wherein, HLR links to each other with RPDP with SMS-GMSC respectively, wherein,

32, system according to claim 31 is characterized in that, described HLR returns the address information of routing iinformation for sensing CS/IMS note Interworking gateway to SMS-GMSC, or, the VMSC address information at the current place of user.