CN100442918C

CN100442918C - Method and system for realizing route control

Info

Publication number: CN100442918C
Application number: CNB2005100639529A
Authority: CN
Inventors: 顾炯炯; 朱东铭
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-03-30
Filing date: 2005-03-30
Publication date: 2008-12-10
Anticipated expiration: 2025-03-30
Also published as: CN1842211A

Abstract

The present invention discloses method for realizing routing control, which is applied to a system comprising a CS domain and an IMS domain. The method is: a routing strategy decision making unit is arranged in advance, and routing strategy information is set in the routing strategy decision making unit; after a query-network entity in the system receives a call/session request from a calling subscriber, the query-network entity sends a routing query message to a called HLR/HSS; after the HLR/HSS receives the routing query message, the HLR/HSS obtains the routing decision information of the called subscriber from the routing strategy decision making unit; the HLR/HSS sends the routing information to the query-network entity according to the routing decision; the query-network entity carries out connection for the call / session according to the route indicated by the routing information. The present invention also discloses a system for realizing the routing control. By using the present invention, when the subscriber uses a terminal using different access technologies to access to the IMS or the CS, the connection route that the subscriber is taken as the called can be determined according to a certain strategy and the registration condition of the subscriber in different domains. The method can flexibly control the called route.

Description

A kind of method and system of realizing route control

Technical field

The present invention relates to the mobile communication technology field, be meant a kind of method that realizes 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 commutative field (CS, Circuit SwitchedDomain), 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 object of the present invention is to provide a kind of method and system of 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.

In order to achieve the above object, the invention provides a kind of method that realizes route control, be applied to comprise that this method is achieved in that in the system in circuit switching (CS) territory and IP Multimedia System IMS territory

Set in advance the routing policy decision package, and in the routing policy decision package routing policy information is set, this method also comprises:

A. after the requester network entity in the system is received calling subscriber's call/session request, send routing inquiry message to called attaching position register HLR/ home signature user server HSS;

After b.HLR/HSS receives this routing inquiry message, obtain called routing decision information from described routing policy decision package;

C.HLR/HSS will be sent to the requester network entity according to the routing iinformation of this routing decision information decision;

D. the requester network entity carries out continuing of this call/session according to the route of routing iinformation indication.

Described routing policy information is that the interface that operator passes through between routing policy decision package and OSS OSS is provided with, or,

Described routing policy information be user terminal by and the routing policy decision package between Ut be provided with;

And, described a kind of or combination in any in being set to increase, delete, revise, inquire about, preserve.

Before operator is provided with routing policy information by the interface between OSS OSS and routing policy decision package, this method further comprises: the routing policy decision package is to the operator of operator authenticating identity, after authentication is passed through, allow the operator of this operator that routing policy information is set again; Or,

The user by and the routing policy decision package between Ut routing policy information is set before, this method further comprises: the routing policy decision package carries out authentication to the user identity of user terminal, after authentication is passed through, allow this user terminal that routing policy information is set again.

Step b comprises: after b1, HLR/HSS receive this routing inquiry message, send the routing decision query requests to the routing policy decision package;

B2, after the routing policy decision package is received the routing decision query requests, the routing policy information that is provided with according to self determines whether that the needs user terminal is in the IMS territory and/or the relevant information in CS territory, if desired, then obtain the called subscriber in the CS territory and/or the relevant information in IMS territory, and according to the called subscriber in the CS territory and/or the routing policy information that is provided with of the relevant information in IMS territory and self determine called routing decision information, and routing decision information sent to HLR/HSS, if do not need, then directly determine called routing decision information according to the routing policy information that self is provided with.

When the routing policy decision package was provided with separately, HLR/HSS and routing policy decision package carried out Signalling exchange by MAP and/or Diameter;

When the routing policy decision package adopts the mode be built among the HLR/HSS to realize, HLR/HSS and routing policy decision package by the inside story between same physical entity internal module alternately or common access sharing data area mode carry out alternately.

HLR/HSS contains the relevant information of called subscriber in CS territory/IMS territory among the step b1 in the routing decision query requests that the routing policy decision package sends; Then the relevant information of called subscriber described in the step b2 in CS territory/IMS territory is to obtain from described routing decision query requests;

Obtaining described called subscriber among the step b2 comprises in the step of the relevant information in IMS territory/CS territory:

The routing policy decision package sends the called user information request to HSS/HLR; If the routing policy decision package is not received called subscriber that HSS/HLR the returns relevant information in IMS territory/CS territory within the predetermined time, then with self the acquiescence called user information as the relevant information of called subscriber in IMS territory/CS territory, if receive called subscriber that HSS/HLR returns relevant information within the predetermined time, then carry out the routing decision judgment processing in the relevant information in IMS territory/CS territory according to this called subscriber who returns in IMS territory/CS territory.

Obtain among the step b2 called subscriber in the CS territory and/or the step of the relevant information in IMS territory comprise:

The routing policy decision package sends the called user information request to HLR/HSS respectively; If the routing policy decision package does not receive within the predetermined time that called subscriber that HLR/HSS returns is in the CS territory and/or the relevant information in IMS territory, then with the called user information of self acquiescence as the called subscriber in the CS territory and/or the relevant information in IMS territory, if receive that within the predetermined time called subscriber that HLR/HSS returns in the CS territory and/or the relevant information in IMS territory, then carries out the routing decision judgment processing according to this called subscriber who returns in the relevant information in IMS territory/CS territory.

Upgrade when the user carries out the position in the CS territory, and/or when revising user data, the CS domain information of initiatively making a strategic decision routing policy required by HLR sends to the routing policy decision package, and/or

When the user registers/nullifies in the IMS territory, and/or when revising user data, the IMS domain information of initiatively making a strategic decision routing policy required by HSS sends to the routing policy decision package, and the routing policy decision package is preserved this information;

Then the relevant information of called subscriber described in the step b2 in CS territory and/or IMS territory is to obtain the local information of preserving from the routing policy decision package.

When gateway MSC GMSC that described requester network entity is the CS territory, if routing decision is for to continue in the IMS territory, serve as reasons the E.164 number of the virtual MSRN that MGCF MGCF number of local configuration constitutes by Mobile Station Roaming Number MSRN numbering plan of called routing decision information among the step b2 then, if routing decision is for to continue in the CS territory, then called routing decision information is this territory route indication among the step b2.

When described requester network entity be the IMS territory inquire CSCF I-CSCF the time, if routing decision is for to continue in the IMS territory, called routing decision information is this territory route indication among the step b2, if routing decision is for to continue in the CS territory, then called routing decision information is called MSRN in the CS territory among the step b2, or MGCF information;

Described MGCF information is the MGCF number, or the MGCF numbering, or the MGCF domain name.

When called routing decision information among the step b2 is route indication of this territory, further comprise among the step c: HLR is to the mobile switching center MSC/VLR PRN operation of initiating to Provide Roaming Number, obtain called MSRN, and the routing iinformation that sends to the requester network entity among the step c comprises called MSRN.

When called routing decision information among the step b2 is route indication of this territory, the routing iinformation that sends to the requester network entity among the step c comprises the service call conversation control function S-CSCF domain name that the IMS territory is distributed for the called subscriber under the registration scenarios, or is the S-CSCF domain name that the IMS territory is distributed for the called subscriber under the called unregistered situation.

When described requester network entity is the GMSC in CS territory, if routing decision is for to continue in the IMS territory, and serve as reasons the E.164 number of the virtual MSRN that MGCF number of local configuration constitutes by the MSRN numbering plan of called routing decision information among the step b2;

Then steps d comprises: after the GMSC in d1, CS territory received the routing iinformation that HLR sends, GMSC went to MGCF with the intercommunication of IMS territory according to this virtual MSRN with setup requests;

D2, MGCF recover Subscriber Number according to virtual MSRN, and CS territory/IMS intercommunication are carried out in this calling handled, and this call/session is continued to continue in the IMS territory.

When described requester network entity is the GMSC in CS territory, if routing decision is for to continue in the IMS territory, when called routing decision information is served as reasons the E.164 number of the virtual MSRN that MGCF number of local configuration constitutes by the MSRN numbering plan among the step b2,

Step b2 further comprises: the routing policy decision package is initiated the PRN operation to MGCF, obtains the virtual MSRN that MGCF distributes, and MGCF writes down the relation between this virtual MSRN and user MSISDN,

Steps d 2 comprises: MGCF recovers MSISDN according to the relation between the virtual MSRN in the incoming call signaling and this virtual MSRN that is write down and user MSISDN.

Step b2 further comprises: the routing policy decision package utilizes MGCF information and the virtual MSRN of user MSISDN information structuring simultaneously,

Steps d 2 comprises: MGCF recovers MSISDN according to the virtual MSRN structural scheme of virtual MSRN in the incoming call signaling and agreement.

Step b2 further comprises: the routing policy decision package is preserved the routing decision information of this calling,

The step that continues that to call out in the steps d in the IMS territory comprises:

D211, MGCF are routed to I-CSCF with this IMS territory session request of setting up;

D212, I-CSCF send routing inquiry message to HSS, after HSS receives this routing inquiry message, send the routing decision query requests to the routing policy decision package;

After d213, routing policy decision package are received this routing decision query requests,, return this territory route indication to HSS according to the routing decision information of this calling of preserving among the step b2;

D214, HSS send routing iinformation to I-CSCF, comprising the S-CSCF domain name after receiving this territory route indication; I-CSCF sends session connection request to this S-CSCF, after this sets up session by normal process, realizes CS territory and the intercommunication of IMS territory.

D221, MGCF are routed to I-CSCF with this IMS territory session request of setting up, and wherein are provided with and suppress the policy lookup sign;

D222, I-CSCF press normal process when HSS inquiry route, send routing inquiry message to HSS, and comprise inhibition policy lookup sign therein;

After d223, HSS receive this routing inquiry message, no longer inquire about routing policy, directly handle and return the S-CSCF domain name to I-CSCF by standard according to this inhibition policy lookup sign;

D224, I-CSCF domain name in view of the above transmit session foundation request to S-CSCF, and continue this session foundation of route by S-CSCF according to user's registration information and ask to Proxy Call Session Control Function P-CSCF and called subscriber, continue to finish CS territory-IMS territory intercommunication call establishment then.

When described requester network entity was the I-CSCF in IMS territory, if routing decision is for to continue in the CS territory, called routing decision information was called when the MSRN in CS territory among the step b2,

Step b2 further comprises: the routing policy decision package sends the indication of inquiry route to HLR, HLR sends the request of Providing Roaming Number to the MSC/VLR at the current place of user, and the roaming number that MSC/VLR returns in the response that Provides Roaming Number is returned to the routing policy decision package in the routing inquiry response;

Step c comprises: after HSS receives MSRN, returns the routing inquiry response, and in sending to the routing iinformation of I-CSCF, carries the MSRN that obtains from the routing policy decision package by the signaling expansion to I-CSCF,

Steps d comprises:

After d311, I-CSCF receive routing iinformation, transmit conversation request to Breakout Gateway Control Function BGCF;

After d312, BGCF select MGCF, and to this MGCF transmission session foundation request;

D314, receive that this session sets up the MGCF of request and IMS territory-CS territory intercommunication is carried out in this session handled, judge this number when the CS territory and belong to the MSRN section, then directly this session is routed to the current place MSC/VLR of user;

D315, MSC/VLR paging continue to finish IMS territory-CS territory intercommunication call establishment process then to the called subscriber.

Step c comprises: after c111, HSS receive MSRN, return the routing inquiry response to I-CSCF, in sending to the routing iinformation of I-CSCF, carry the S-CSCF domain name that the IMS territory is distributed for the called subscriber under the registration scenarios, or be the S-CSCF domain name that the IMS territory is distributed for the called subscriber under the called unregistered situation

C112, HSS be according to user contracting data, forwards the data of the called MSRN in the CS territory that obtains from the routing policy decision package to by Sh interface before an application server that will be triggered and control this session is provided with,

Steps d comprises: after d411, I-CSCF receive routing iinformation, transmit conversation request to S-CSCF; S-CSCF is triggered to the described application server that is provided with Redirection Information according to user contracting data with session,

D412, application server are called MSRN in the CS territory according to data modification session destination address is set, and S-CSCF analyzes according to the amended session destination address of application server, and session is forwarded to BGCF,

After d413, BGCF select MGCF, and to this MGCF transmission session foundation request;

D414, receive that this session sets up the MGCF of request and IMS territory-CS territory intercommunication is carried out in this session handled, judge this number when the CS territory and belong to the MSRN section, then directly this session is routed to the current place MSC/VLR of user;

D415, MSC/VLR paging continue to finish IMS territory-CS territory intercommunication call establishment process then to the called subscriber.

When described requester network entity is the I-CSCF in IMS territory, if routing decision is for to continue in the CS territory, when called routing decision information is MGCF information among the step b2,

Step c comprises: after HSS receives MGCF information, returns the routing inquiry response to I-CSCF, and in sending to the routing iinformation of I-CSCF, carries the MGCF domain name that obtains according to MGCF information,

Steps d comprises:

After d511, I-CSCF receive routing iinformation, transmit conversation request to MGCF;

After d512, MGCF receive this conversation request, IMS territory-CS territory intercommunication is carried out in this calling handled, and directly initiate CS territory routing inquiry to HLR according to user number section and local configuration;

After d513, HLR receive this CS territory routing inquiry request, no longer inquire about routing policy and directly initiate the PRN operation according to the Original Signaling Point and the local configuration of CS territory routing inquiry request, and thus obtained MSRN is returned to MGCF to the current place MSC/VLR of user;

D514, MGCF analyze will call out in the CS territory according to MSRN and route to the current place MSC/VLR of user, and the MSC/VLR paging continues to finish IMS territory-CS territory intercommunication call establishment process to the called subscriber.

After execution in step d, this method further comprises:

The user contracted by Visited Mobile Switching Center termination side CAMEL Subscription Information VT-CSI at CS territory callee side IN service trigger at landing office.

After execution in step d, this method further comprises:

The user contracted by VT-CSI at CS territory callee side IN service trigger at landing office.

Or, by MGCF supporting business exchange point SSP function, in steps d, finish the user and handle in the triggering of CS territory callee side IN service at MGCF.

Described routing policy information is:

As the user only in the IMS territory or territory, CS territory can be timely, all callings all are chosen in this user and can reach the territory and continue; Or

When the user all can be timely in CS territory/IMS territory, continue according to network domains with the calling same type; Or, according to factors such as user/network settings or binding times with CS territory or IMS territory preferential replay, or

No matter current the reached state in two territories of called subscriber how, according to user/network settings or the binding time factor is forced in the CS territory or continue in the IMS territory.For achieving the above object, the present invention also provides a kind of system that realizes route control, and this system comprises: comprise CS territory, IMS territory and routing policy decision package, the HSS in HLR in the CS territory and IMS territory links to each other with the routing policy decision package respectively, wherein,

The routing policy decision package is used for the routing decision query requests at HLR/HSS, the current routing policy of preserving according to self and in conjunction with called in the CS territory and/or the relevant information in IMS territory, determine and provide called routing decision information to HLR/HSS;

HLR/HSS, be used to preserve and be provided with or user contracting data and the log-on message of request in it provides this territory of routing policy decision package according to this locality, the called routing inquiry request of the requester network entity in the receiving system, inquire about called current routing decision information to the routing policy decision package, and return called routing iinformation to the requester network entity according to the routing decision information that receives.

Described routing policy decision package 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 routing policy decision package further comprises the interface with user terminal, is used to receive the operation signal of user terminal, and the policy information of self preserving is increased, deletes, inquires about, preserves and revises.

The routing policy decision package is the physical entity that is provided with separately, or for being embedded in the logic entity of HLR or HSS inside, or HLR, HSS and routing policy decision package are the logic entity that is arranged in the same physical entity;

And when the routing policy decision package was provided with separately, HLR/HSS and routing policy decision package carried out Signalling exchange by MAP and/or Diameter;

Described routing policy information is:

No matter current the reached state in two territories of called subscriber how, according to user/network settings or the binding time factor is forced in the CS territory or continue in the IMS territory.

The present invention is by being provided with a routing policy decision package, be used to preserve current routing policy information, when being a calling or conversation switching,, determine called routing condition by current routing policy information and the called relevant information that the routing policy decision package is preserved in each territory.Like this, can determine routing iinformation flexibly in the not registration scenarios of same area and user's wish according to certain strategy, user, and then this call/session be continued according to the routing iinformation of determining.Use the present invention, can be so that the user passes through a unified user ID, when terminal access to IMS that uses different access technologies or CS, can both receive the calling of other users,, promote the application and the development of CS/IMS/WLAN network by having improved user's impression according to predetermined strategy to it.

Description of drawings

Fig. 1 is for realizing the networking schematic diagram of system of the present invention;

Fig. 2 is for realizing the schematic flow sheet of the inventive method;

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.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

Referring to shown in Figure 1, realize that system of the present invention comprises CS territory, IMS territory and routing policy decision package at least.Wherein, comprise HLR and GMSC at least in the CS territory; The IMS territory comprises HSS and I-CSCF at least.The HSS in HLR in the CS territory and IMS territory links to each other with the routing policy decision package respectively.

HSS is the accessing points of IMS territory routing inquiry, is used to preserve IMS territory user contracting data and log-on message, and for realizing cross-domain route control of the present invention, HSS also need have following function: inquire about current routing decision to the routing policy decision package; Answer routing policy decision package inquiry to return the user in information such as the subscription data in this territory and login states; According to the return results of routing decision unit, (I-CSCF) provides routing iinformation to the requester network entity; According to the return results of routing decision unit, cooperate requester network to talk about in case of necessity to be routed to the CS territory and continue.

HLR is the accessing points of CS territory routing inquiry, is used to preserve CS territory user contracting data and location updating message, and for realizing the cross-domain route control of described enhancing, HLR also has following function: inquire about current routing decision to the routing policy decision package; Answer routing policy decision package inquiry to return the user in information such as the subscription data in this territory and positions; According to the return results of routing decision unit, (GMSC) provides routing iinformation to the requester network entity.

The routing policy decision package is the logical functional entity that is increased newly for the cross-domain route control that realizes described enhancing, be used to preserve current routing policy information, and reach the current routing decision information of determining in the information such as reached situation in two territories from the user of HLR/HSS acquisition for the HSS/HLR that inquires about provides according to current routing policy.The routing policy decision package can be the physical entity that is provided with separately, also can be embedded in the inner realization of HLR/HSS respectively.

Can intercommunication in order to make between HLR/HSS and the routing policy decision package, the routing policy decision package need provide the interface with HLR/HSS, and this interface can be realized with MAP or Diameter or other applicable protocols and expansion thereof.Like this, HSS/HLR just can inquire about the routing policy decision package, obtain routing decision and information that current strategies is determined, and required signatory and login state/position update mode and the positional information etc. that get the user in CS territory/IMS territory of the definite route of routing policy decision package visit HLR/HSS acquisition, thereby realization is determined the route that continues according to routing policy.

Further, in order to make operator can visit the routing policy decision package, to be provided with, to inquire about, to revise and to preserve routing policy information, the routing policy decision package can also further provide the interface with OSS OSS, and this interface can be realized in similar present HSS/HLR Ying Yetingjiekou mode.Like this, the network operator can utilize management server visit routing policy decision package, current routing policy is set flexibly, alternatively, the routing policy decision package can provide the interface with the user again, this interface can realize that the user can be provided with current routing policy flexibly by terminal on the routing policy decision package like this in the Ut mode in IMS territory.

Certainly, HLR/HSS shown in Figure 1 and routing policy decision package are logic entities, and in actual application, these entities can close to be established also and can set up separately, and the routing policy decision package can be provided with separately also can be built among the HLR/HSS respectively and realize.When HLR, HSS and routing policy decision package all close when establishing, be alternately inner each other alternately; When HLR/HSS/ routing policy decision package during all or part of setting up separately, mutual with MAP or Diameter to each other; When the routing policy decision package adopts the mode be built in respectively among the HLR/HSS to realize, become internal interface with the HLR/HSS interface at place, two parts also can by self-defining internal interface or with user and OSS interface realization data sync; When the strategic decision-making unit is provided with separately, and also can select the related expanding of other suitable agreements and necessity to carry out alternately between HLR/HSS.

In the present invention, routing policy can but be not limited to comprise following content:

As the user only in the IMS territory or territory, CS territory can be timely, all be chosen in this user for all callings and can reach the territory and continue; When the user all can be timely in CS territory/IMS territory, 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 territory or IMS territory preferential replay, also can not consider current the reached state of user, force in the CS territory or continue in the IMS territory according to factors such as user/network settings or binding times in two territories.

Based on system shown in Figure 1, referring to shown in Figure 2, the method that realization the present invention strides route control is as follows:

Step 200: set in advance the routing policy decision package, and in the routing policy decision package, routing policy information is set.What can provide by the routing policy decision package in the present invention, is provided with routing policy information with the OSS interface or with the interface of user terminal.Further, in setting up procedure, the routing policy decision package just allows operation, to guarantee the safety of network operation after can carrying out authentication to the operation of operator and user's operation.

Step 201: after the requester network entity in the system is received calling subscriber's call/session request, send routing inquiry message to called HLR/HSS.

The requester network entity can be GMSC or I-CSCF.When the requester network entity was the GMSC in CS territory, GMSC can initiate routing inquiry to HLR by MAP SRI message (MAP_SEND_ROUTING_INFORMATION).When the requester network entity was the I-CSCF in IMS territory, I-CSCF can initiate routing inquiry to HSS with Diameter LIR (Location-Info-Request).

After step 202:HLR/HSS receives this routing inquiry message, obtain called routing decision information from described routing policy decision package.

Specifically comprise: after HLR/HSS receives this routing inquiry message, send the routing decision query requests to the routing policy decision package; After query requests is received in the routing decision unit, according to the called subscriber in the CS territory/relevant information in territory, IMS territory, called subscriber determine called routing decision in the relevant information in IMS territory/CS territory and the routing policy that self is provided with, and routing decision information sent to HLR/HSS.

In the system shown in Fig. 1, when the routing policy decision package adopts when being built in that mode realizes among the HSS/HLR, communicating by letter between HSS/HLR and the routing policy decision package in the described step 202 to alternately inner.

Under the part situation, the routing policy decision package need obtain called relevant information at HLR, HSS, and determines called routing decision in conjunction with current routing policy and called relevant information at HLR, HSS.On the one hand, the routing policy decision package can be after receiving query requests, again respectively to HLR, HSS sends the called party information request, from HLR, HSS obtains the relevant information in its territory, thereby judge routing decision, on the other hand, HLR/HSS can carry this territory relevant information to the routing policy decision package in query messages, like this, the called party information request that the routing policy decision package can only be initiated another territory gets final product, at last, HLR/HSS can be when the user carries out in the CS territory that the position is upgraded or the IMS territory is registered/nullified or in two territories the user data variation takes place, employing is such as MAP-UPDATE-LOCATION, modes such as MAP-INSERT-SUBSCRIBER-DATA required the domain information of initiatively routing policy being made a strategic decision notified the routing policy decision package, like this, the routing policy decision package can be handled according to the relevant information that preserve this locality and get final product.Certainly, if the routing policy decision package is determined not the needs user in the relevant information in two territories according to current routing policy, then can omit the step of the called relevant information in two territories of inquiry.Here, the relevant information of user in two territories can be current the reached state in two territories of user, and user signing contract information or the like.

And for the above-mentioned inquiry of routing policy decision package, if overtime not the receiving of routing policy decision package returned institute's information inquiring, the routing policy decision package is handled according to the default process mode of this locality configuration, as pressing the user in the unreachable processing in this territory.

The routing policy decision package returns routing decision and information to the HLR/HSS of inquiry, comprising: the two kinds of situations of indication that continue route indication in this territory and determine to continue in another network domains.

First kind of situation: when determining when the network domains of initiating inquiry continues, return that continuing route in this territory indicates; This indication can be to carry the response of the refusal of the last query messages of specific reasons value;

Second kind of situation: when determining need be when another network domains continues:

(1) in CS territory inquiry, determines: return E.164 number by the virtual MSRN that MGCF number of this locality configuration constitutes by the MSRN numbering plan to HLR under continuing situation in the IMS territory; Further, the routing policy decision package should be able to be preserved relevant information and return identical routing decision when follow-up HSS inquires about routing decision once more for this calling.

Can recover user's Mobile Subscriber International ISDN Number for follow-up at MGCF, can be so that also comprise user MSISDN key message among the virtual MSRN simultaneously, follow-up MGCF directly recovers MSISDN according to the virtual MSRN in the call signaling of Incoming;

For the follow-up Mobile Subscriber International ISDN Number that can recover the user at MGCF, also can between strategic decision-making unit and MGCF, increase the once operation of similar PRN, distribute virtual MSRN and write down relation between this virtual MSRN and user MSISDN by MGCF, thereby recover MSISDN according to the virtual MSRN in the call signaling of Incoming;

(2) in the inquiry of IMS territory, determine under continuing situation in the CS territory:

The routing policy decision package is at first initiated SRI to HLR, and returns the MSRN that HLR returns to HSS in response; For avoiding circular treatment, query strategy decision package and the PRN that directly proceeds to the current place MSC/VLR of user by normal process handles no longer when HLR receives from the SRI of routing policy decision package.

The routing policy decision package can be not yet be got MSRN and is directly returned the MGCF information of appointment to HSS to HLR, this MGCF information can but be not limited to the MGCF number, MGCF numbering, MGCF domain name etc.

Step 203:HLR/HSS will be sent to the requester network entity according to the routing iinformation that the routing decision information of obtaining is determined, the requester network entity continues this call/session route according to routing iinformation, cooperates requester network to finish route control by HLR/HSS in case of necessity.

Receive the continuation returned the strategic decision-making unit indication in this territory route as HLR/HSS, then the routing inquiry that carries out this territory by normal process is handled, and comprises following situation:

(1) for IMS HSS: return the S-CSCF domain name current distribution of user or that distribute for non-registered users to requester network entity (I-CSCF), or return failure under the unregistered and signatory unregistered state related service situation the user;

(2) for CS HLR: initiate the PRN operation to the current place MSC/VLR of user, or under not start situation of user, requester network entity (GMSC) is returned the SRI failure.

When the indication that continues by another territory that HLR/HSS receives that the routing policy decision package returns, comprise following situation:

(1) for IMS HSS: receive the MSRN that the routing policy decision package returns, then can MSRN be returned to I-CSCF by the expansion Cx interface; According to this MSRN session being gone to BGCF by the function expansion by I-CSCF selects CS territory/IMS territory Interworking gateway to change CS processing (CS judges in the territory that this number belongs to the MSRN section and will be routed directly to the current place VMSC of user), also can return the S-CSCF domain name current distribution of user or that distribute for non-registered users at Cx interface by normal process, but before can triggering and possess the AS insertion log-on session of corresponding control ability, this calling goes to the data of this MSRN simultaneously by Sh interface, make session after S-CSCF is triggered to AS, change before under its control, according to this MSRN session is gone to BGCF by S-CSCF then and select CS territory/IMS territory Interworking gateway to change CS territory processing (CS judges in the territory that this number belongs to the MSRN section and will be routed directly to the current place VMSC of user).

Certainly, in processing procedure, the GMSC in process CS territory carries out called routing inquiry processing owing to call out no longer, the user need be contracted by VT-CSI at CS territory callee side IN service and trigger at landing office.

(2) for IMS HSS: receive the MGCF information of returning the strategic decision-making unit, according to local configuration restore MGCF domain name, then this domain name is returned to I-CSCF as the S-CSCF domain name, after I-CSCF will talk about and be routed to MGCF, MGCF judges to HLR initiation CS territory routing inquiry according to informed source or called number, HLR disposes the PRN operation of no longer inquiring about routing policy and directly getting MSRN according to routing inquiry request Original Signaling Point and this locality, and the MSRN that obtains returned to MGCF, MGCF finishes IMS territory/CS territory intercommunication and handles and route the call to called place VMSC according to MSRN.

In this processing procedure, the GMSC in process CS territory carries out called routing inquiry processing owing to call out equally no longer, also needs the user is contracted in the landing office triggering by VT-CSI at CS territory callee side IN service, or further supports the SSP function by MGCF.

(3) for CS HLR: the virtual MSRN that receives the sensing MGCF that returns the strategic decision-making unit, then directly return to requester network entity (GMSC), requester network entity (GMSC) goes to calling the MGCF gateway of CS territory/IMS territory intercommunication in view of the above, MGCF recovers Subscriber Number according to virtual MSRN and carries out CS territory/IMS territory intercommunication and handle, and changes the IMS territory then and continues.

At IMS territory I-CSCF when HSS carries out routing inquiry, HSS will carry out routing inquiry to the routing decision unit once more, at this moment, as previously mentioned, the routing policy decision package should be able to be preserved relevant information and return identical routing decision when follow-up HSS inquires about routing decision once more for this calling;

When MGCF is forwarded to I-CSCF with the session request, also can judge that according to virtual MSRN thereby this time calling is to increase specific identifier according to the calling that routing decision changes over to from the CS territory message by it, at IMS territory I-CSCF when HSS carries out routing inquiry, be identified in view of the above and indicate this inquiry not do policy lookup in the routing inquiry, HSS no longer inquires about the routing decision unit in view of the above and directly carries out IMS territory standard and handle.

Lift specific embodiment below and describe technical scheme of the present invention in detail.

Fig. 3 is at CS territory calling party, inquires about called route by HLR, the embodiment one flow process schematic diagram that control continues by the IMS territory.

Referring to shown in Figure 3, the idiographic flow of embodiment one is as follows:

After step 301～302:GMSC receives user's call/session request, send routing inquiry request to HLR; After HLR receives routing inquiry request, send routing decision inquiry (SRI) message to the routing policy decision package, and in query messages, carry the relevant information of the required user of routing decision in the CS territory, current whether operation is upgraded in the completing place in the CS territory, whether the user registers information such as supplementary service such as Call Forwarding Unconditional or incoming call locking addressing number MSISDN, the user in CS territory as the user.

Step 303: the routing policy decision package determines whether that according to current strategies also needs are made a strategic decision in the relevant information in IMS territory according to the called subscriber, and if desired, then execution in step 304, otherwise skips steps 304～305 continues to carry out this flow process.

Step 304～305: the routing policy decision package sends information inquiry (ATI) message to HSS, after HSS receives this message, returns the relevant information of called subscriber in the IMS territory.

Step 306～308: the routing policy decision package carries out routing decision according to current strategies and called subscriber in the relevant information in CS territory and IMS territory, decision is continued by the IMS territory, send to change the indication that continues of IMS territory to HLR, the virtual MSRN of the IMS territory MGCF that inserts comprising needs, this virtual MSRN is that the routing policy decision package forms according to the MSRN numbering and in conjunction with the structure of the key message among the user MSISDN according to the MGCF information that this locality sets in advance, perhaps send the PRN request according to the MGCF information that this locality sets in advance to MGCF by the routing policy decision package, MGCF distributes and returns to the routing policy decision package, and, write down decision information simultaneously for this calling, when HSS calls out the inquiry routing decision for this once more, can return identical routing decision like this; After HLR received this indication that continues, this should return to GMSC (SRI_ack) by virtual MSRN.

Step 309～312:GMSC routes the call to MGCF according to the analysis of virtual MSRN, carries out the CS/IMS intercommunication by MGCF and handles, and recover Subscriber Number according to virtual MSRN, the IMS session of correspondence is set up ask to be routed to I-CSCF.

Step 313～319:I-CSCF sends routing inquiry request to HSS, after HSS receives this routing inquiry request, send routing inquiry request to the routing policy decision package, the routing policy decision package returns this territory route indication according to previous decision information of preserving to HSS; HSS sends routing iinformation to I-CSCF, comprising the S-CSCF domain name after receiving this territory route indication; I-CSCF sends session connection request to this S-CSCF, after this sets up session by normal process, realizes CS territory and the intercommunication of IMS territory.

Referring to shown in Figure 4, present embodiment is at CS territory calling party, inquires about called route by HLR, the embodiment two flow process schematic diagrames that control continues by the IMS territory.

After step 401～402:GMSC receives user's call/session request, send routing inquiry request to HLR; After HLR receives routing inquiry request, send routing decision inquiry (SRI) message to the routing policy decision package, and in routing inquiry message, carry the relevant information of the required user of routing decision in the CS territory, as the user addressing number MSISDN, the user in CS territory current in the CS territory whether the completing place upgrade operation, user and whether register supplementary services such as Call Forwarding Unconditional or incoming call locking etc. and relate to the information of user in CS territory accessibility.

Step 403: after the routing policy decision package is received this routing inquiry message, determine whether that according to current strategies also needs are made a strategic decision in the relevant information in IMS territory according to the user, if desired, then execution in step 304, otherwise skips steps 404～405 continues to carry out this flow process.

Step 404～405: the routing policy decision package sends information inquiry (ATI) message to HSS, after HSS receives this message, returns the relevant information of called subscriber in the IMS territory.

Step 406～408: the routing policy decision package carries out routing decision according to current strategies and user in the relevant information in CS territory and IMS territory, decision is continued by the IMS territory, send to change the indication that continues of IMS territory to HLR, the virtual MSRN of the IMS territory MGCF that inserts comprising needs, this virtual MSRN is that the routing policy decision package forms according to the MSRN numbering and in conjunction with the structure of the key message among the user MSISDN according to the MGCF information that this locality sets in advance, perhaps send the PRN request according to the MGCF information that this locality sets in advance to MGCF by the routing policy decision package, MGCF distributes and returns to the routing policy decision package, HLR should return to GMSC (SRI_ack) by virtual MSRN after receiving this indication that continues.

Step 409～410:GMSC routes the call to MGCF according to the analysis of virtual MSRN.

Step 411～412:MGCF carries out the CS/IMS intercommunication to this calling to be handled, and recover Subscriber Number according to virtual MSRN, judge this time according to virtual MSRN and call out the calling that changes over to from the CS territory for through the route Decision Control, the IMS territory session of correspondence is set up add the special processing sign when asking to be routed to I-CSCF.

Step 413～419:I-CSCF presses normal process when HSS inquiry route, in routing inquiry request, increase the sign of " inhibition policy lookup " according to this special processing sign, HSS no longer inquires about routing policy according to this " inhibition policy lookup " sign and directly handles by standard and return the S-CSCF domain name, I-CSCF domain name in view of the above transmits session foundation request to S-CSCF, and continue this session foundation of route by S-CSCF according to user's registration information and ask to P-CSCF and called subscriber, continue to finish CS territory-IMS territory intercommunication call establishment then.

Embodiment one is with the difference of embodiment two: for avoided obtaining different decision-makings different disposal of taking of the situation of relayed call/session back and forth between two network domains in twice inquiry: the routing decision of determining when needing routing policy decision package record CS territory HLR inquiry among the embodiment one, when follow-up IMS territory HSS carries out the routing decision inquiry once more, provide same routing decision (continuing), thereby avoided in twice inquiry, obtaining different decision-makings in the IMS territory; And the judgment processing by MGCF, I-CSCF has been added the sign of restraining the routing policy inquiry at I-CSCF in HSS carries out the request of routing inquiry in embodiment two, and HSS no longer directly returns the routing iinformation that continues in this territory to the inquiry of routing policy decision package according to the judgement to this sign, has reached the purpose of avoiding obtaining different decision-makings in twice inquiry equally.

Lift specific embodiment three below and CS territory calling party is described, inquire about called route by HLR, the process that control continues by the CS territory in conjunction with Fig. 5.

Referring to shown in Figure 5, the idiographic flow of embodiment three is as follows:

Step 501～502:GMSC sends routing inquiry request to HLR; After HLR receives routing inquiry request, send inquiry (SRI) message to the routing policy decision package, and in query messages, carry the relevant information of the required user of routing decision in the CS territory, as the user addressing number MSISDN, the user in CS territory current in the CS territory whether the completing place upgrade operation, user and whether register supplementary services such as Call Forwarding Unconditional or incoming call locking etc. and relate to the information of user in CS territory accessibility.

Step 503～505: the routing policy decision package determines whether that according to current strategies also needs are made a strategic decision in the relevant information in IMS territory according to the user, if desired, then initiate information inquiry (ATI), after HSS receives this message, return the relevant information of called subscriber in the IMS territory to HSS.

Step 506～510: the routing policy decision package carries out routing decision according to current strategies and user in CS territory and IMS territory relevant information, decision is still continued by the CS territory, returning continuation to HLR indicates in CS territory route, after HLR receives this indication, press CS territory normal process and initiate the PRN operation, and thus obtained MSRN is returned to GMSC (SRI_ack) to called current place MSC/VLR.

Step 511～513:GMSC carries out route analysis according to the MSRN that returns, and sends setup requests to MSC/VLR then, wherein contains called MSRN; After this, MSC/VLR sets up and calls out connection according to normal call flow.

Referring to shown in Figure 6, lift specific embodiment four below and describe IMS territory calling party in detail, inquire about called route by HSS, the process that control continues by the CS territory.

After step 601～602:I-CSCF receives user's conversation request, send routing inquiry message to HSS, after HSS receives this routing inquiry message, initiate inquiry (SRI) to the routing policy decision package, and in query messages, carry the relevant information of the required user of routing decision in the IMS territory.

Step 603～604: the routing policy decision package determines whether that according to current strategies also needs are made a strategic decision in the relevant information in CS territory according to the user, as not needing, then directly carry out routing decision in IMS territory relevant information according to current strategies and user, decision is continued by the CS territory, if desired, obtaining called relevant information in the CS territory from HLR, and then the relevant information in CS territory and IMS territory is carried out routing decision according to current strategies and user, decision is continued by the CS territory.

Step 605～608: the routing policy decision package sends the indication of inquiry route to HLR, and HLR receives this indication back and initiates the PRN operation to called current place MSC/VLR, and thus obtained MSRN is returned to routing policy decision package (SRI).

Step 609～610: the routing policy decision package returns indication in CS territory route to HSS, and carry from the MSRN (SRI_ack) of HLR acquisition, after HSS receives this indication, return the routing inquiry response, and carry the MSRN that obtains from the routing policy decision package by the signaling expansion to I-CSCF.

After step 611～612:I-CSCF receives this inquiry response, transmit conversation request to BGCF; After BGCF selects MGCF, and to this MGCF transmission session foundation request; Receive that MGCF that this session sets up request carries out IMS territory/CS territory to this session and carries out intercommunication and handle, judge this number when the CS territory and belong to the MSRN section, then directly this session is routed to the current place VMSC of user, the VMSC paging continues to finish IMS territory-CS territory intercommunication call establishment process then to the called subscriber.

Lift specific embodiment five below and, inquire about called route by HSS, the process that control continues by the CS territory in conjunction with explanation IMS territory calling party shown in Figure 7.

Referring to shown in Figure 7, the idiographic flow of present embodiment is as follows:

After step 701～702:I-CSCF receives user's conversation request, send routing inquiry message to HSS, after HSS receives this routing inquiry message, initiate inquiry (SRI) to the routing policy decision package, and in query messages, carry the relevant information of the required user of routing decision in the IMS territory.

Step 703～704: the routing policy decision package determines whether that according to current strategies also needs are made a strategic decision in the relevant information in CS territory according to the user, as not needing, then directly carry out routing decision in IMS territory relevant information according to current strategies and user, decision is continued by the CS territory, if desired, obtaining called relevant information in the CS territory from HLR, and then the relevant information in CS territory and IMS territory is carried out routing decision according to current strategies and user, decision is continued by the CS territory.

Step 705～706: the routing policy decision package according to this locality be configured in return in CS territory route indication, directly return selected MGCF information, HSS returns to corresponding MGCF domain name the I-CSCF of inquiry as the S-CSCF domain name.

Step 707～712:I-CSCF handles according to standard the session request is forwarded to the MGCF that is considered as S-CSCF; After MGCF carries out IMS territory/CS territory intercommunication processing, directly initiate CS territory routing inquiry according to user number section and local configuration to HLR, HLR no longer carries out the routing policy inquiry to the routing policy decision package according to the source and the local configuration of this routing inquiry request, but directly initiate the PRN operation, and thus obtained MSRN is returned to MGCF (SRI) to the current place MSC/VLR of user;

Step 713～715:MGCF analyzes will call out in the CS territory according to MSRN and routes to the current place VMSC of user, and the VMSC paging continues to finish IMS territory-CS territory intercommunication call establishment process then to the called subscriber.

Claims

1, a kind of method that realizes route control, be applied to comprise in the system in circuit switching (CS) territory and IP Multimedia System IMS territory, it is characterized in that: set in advance the routing policy decision package, and in the routing policy decision package routing policy information is set, this method also comprises:

2, method according to claim 1 is characterized in that:

Described routing policy information is that the interface that operator passes through between OSS OSS and routing policy decision package is provided with, or,

3, method according to claim 2 is characterized in that:

4, method according to claim 1, it is characterized in that: step b comprises:

After b1, HLR/HSS receive this routing inquiry message, send the routing decision query requests to the routing policy decision package;

B2, after the routing policy decision package is received the routing decision query requests, the routing policy information that is provided with according to self determines whether that the needs user terminal is in the CS territory and/or the relevant information in IMS territory, if desired, then obtain the called subscriber in the CS territory and/or the relevant information in IMS territory, and according to the called subscriber in the CS territory and/or the routing policy information that is provided with of the relevant information in IMS territory and self determine called routing decision information, and routing decision information sent to HLR/HSS, if do not need, then directly determine called routing decision information according to the routing policy information that self is provided with.

5, method according to claim 4 is characterized in that:

6, according to claim 4 or 5 described methods, it is characterized in that: HLR/HSS contains the relevant information of called subscriber in CS territory/IMS territory among the step b1 in the routing decision query requests that the routing policy decision package sends; Then the relevant information of called subscriber described in the step b2 in CS territory/IMS territory is to obtain from described routing decision query requests;

The routing policy decision package sends the called user information request to HSS/HLR;

If the routing policy decision package is not received called subscriber that HSS/HLR the returns relevant information in IMS territory/CS territory within the predetermined time, then with self the acquiescence called user information as the relevant information of called subscriber in IMS territory/CS territory, if receive called subscriber that HSS/HLR returns relevant information within the predetermined time, then carry out the routing decision judgment processing in the relevant information in IMS territory/CS territory according to this called subscriber who returns in IMS territory/CS territory.

7, according to claim 4 or 5 described methods, it is characterized in that: obtain among the step b2 called subscriber in the CS territory and/or the step of the relevant information in IMS territory comprise:

The routing policy decision package sends the called user information request to HLR/HSS respectively; If the routing policy decision package does not receive within the predetermined time that called subscriber that HLR/HSS returns is in the CS territory and/or the relevant information in IMS territory, then with the called user information of self acquiescence as the called subscriber in the CS territory and/or the relevant information in IMS territory, if receive called subscriber that HLR/HSS returns within the predetermined time in the CS territory and/or the relevant information in IMS territory, then according to this called subscriber who returns in the CS territory and/or the relevant information in IMS territory carry out the routing decision judgment processing.

8, method according to claim 4 is characterized in that:

9, method according to claim 4 is characterized in that:

10, method according to claim 4 is characterized in that:

11, method according to claim 9, it is characterized in that: when called routing decision information among the step b2 is indicated for this territory route, further comprise among the step c: HLR is to the mobile switching center MSC/VLR PRN operation of initiating to Provide Roaming Number, obtain called MSRN, and the routing iinformation that sends to the requester network entity among the step c comprises called MSRN.

12, method according to claim 10, it is characterized in that: when called routing decision information among the step b2 is indicated for this territory route, the routing iinformation that sends to the requester network entity among the step c comprises the service call conversation control function S-CSCF domain name that the IMS territory is distributed for the called subscriber under the registration scenarios, or is the S-CSCF domain name that the IMS territory is distributed for the called subscriber under the called unregistered situation.

13, method according to claim 9, it is characterized in that: when described requester network entity is the GMSC in CS territory, if routing decision is for to continue in the IMS territory, and serve as reasons the E.164 number of the virtual MSRN that MGCF number of local configuration constitutes by the MSRN numbering plan of called routing decision information among the step b2;

Then steps d comprises:

After the GMSC in d1, CS territory received the routing iinformation that HLR sends, GMSC went to MGCF with the intercommunication of IMS territory according to this virtual MSRN with setup requests;

14, method according to claim 13, it is characterized in that: when described requester network entity is the GMSC in CS territory, if routing decision is for to continue in the IMS territory, when called routing decision information is served as reasons the E.164 number of the virtual MSRN that MGCF number of local configuration constitutes by the MSRN numbering plan among the step b2

15, method according to claim 13, it is characterized in that: when described requester network entity is the GMSC in CS territory, if routing decision is for to continue in the IMS territory, when called routing decision information is served as reasons the E.164 number of the virtual MSRN that MGCF number of local configuration constitutes by the MSRN numbering plan among the step b2

16, method according to claim 13 is characterized in that:

17, method according to claim 13 is characterized in that: the step that continues that will call out in the steps d in the IMS territory comprises:

18, method according to claim 10 is characterized in that: when described requester network entity was the I-CSCF in IMS territory, if routing decision is for to continue in the CS territory, called routing decision information was called when the MSRN in CS territory among the step b2,

Steps d comprises:

19, method according to claim 10 is characterized in that: when described requester network entity was the I-CSCF in IMS territory, if routing decision is for to continue in the CS territory, called routing decision information was called when the MSRN in CS territory among the step b2,

Step c comprises:

After c111, HSS receive MSRN, return the routing inquiry response to I-CSCF, in sending to the routing iinformation of I-CSCF, carry the S-CSCF domain name that the IMS territory is distributed for the called subscriber under the registration scenarios, or be the S-CSCF domain name that the IMS territory is distributed for the called subscriber under the called unregistered situation

Steps d comprises:

After d411, I-CSCF receive routing iinformation, transmit conversation request to S-CSCF; S-CSCF is triggered to the described application server that is provided with Redirection Information according to user contracting data with session,

20, method according to claim 10 is characterized in that: when described requester network entity is the I-CSCF in IMS territory, if routing decision is for to continue in the CS territory, and when called routing decision information is MGCF information among the step b2,

Steps d comprises:

21, according to claim 18 or 19 described methods, it is characterized in that: after execution in step d, this method further comprises:

22, method according to claim 20 is characterized in that: after execution in step d, this method further comprises:

The user contracted by VT-CSI at CS territory callee side IN service trigger at landing office; Or

By MGCF supporting business exchange point SSP function, in steps d, finish the user and handle in the triggering of CS territory callee side IN service at MGCF.

23, method according to claim 1 is characterized in that: described routing policy information is:

24, a kind of system that realizes route control, it is characterized in that: comprise CS territory, IMS territory and routing policy decision package, the HSS in HLR in the CS territory and IMS territory links to each other with the routing policy decision package respectively, wherein,

25, system according to claim 24, it is characterized in that: described routing policy decision package further comprises the interface with OSS OSS, be used to receive the operator of operator operation signal, the policy information of self preserving is increased, deletes, inquires about, preserves or revises.

26, system according to claim 24, it is characterized in that: described routing policy decision package further comprises the interface with user terminal, be used to receive the operation signal of user terminal, the policy information of self preserving is increased, deletes, inquires about, preserves or revises.

27, system according to claim 24, it is characterized in that: the physical entity of routing policy decision package for being provided with separately, or for being embedded in the logic entity of HLR or HSS inside, or HLR, HSS and routing policy decision package are the logic entity that is arranged in the same physical entity;

And,

28, system according to claim 24 is characterized in that: described routing policy information is: