CN1802022A - Method and system for building initial call in continuity service of voice service - Google Patents

Abstract

Present invention relates to a method and system for establishing calling in continuance voice service. It contains user terminal notifying registration state of application server in circuit domain, application server determining user terminal mode according to user terminal current registered circuit domain network supported route control pattern information, notifying user terminal, when said user terminal originating circuit domain calling, originating calling according to notified originating calling mode. Said invention can maximized utilize dialing side circuit domain CAMEL proceeding initial call establishment and anchoring calling in gsmSCF with CCCF function utilizing USSD Notify / Prefix scheme as CAMEL supply, avoiding calling static anchoring failing due to dialing side circuit CAMEL scarce capacity.

Description

In continuity service of voice service, set up the method and system of initial call

Technical field

The present invention relates to network communications technology field, relate in particular to a kind of method and system of in continuity service of voice service, setting up initial call.

Background technology

From 3GPP R5 (3rd Generation Partnership Project, 3rd Generation Partnership Project) stage, UMTS (universal mobile telecommunications system) core net is divided into CS (circuit switching), PS (packet switching) and three subsystems of IMS (IP Multimedia System).

CS territory (Circuit Switched Domain, circuit commutative field) is used for providing to the user connection of Circuit Service.The CS territory mainly comprises: MSC (MSC Server/CS-MGW, MobileSwitch Center Server/CS-Media GateWay, Mobile Switching Center Server/circuit domain-media gateway), GMSC (Gateway MSC, gateway MSC) and IWF (InterWorKing Function, IWF).Wherein, MSC finishes 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 and MSC are closely related, finish the signaling translation function between PLMN (public land mobile net) and ISDN (integrated services digital network), PSTN (public telephone switching network), PDN (Packet Data Network packet data network), thereby the realization network interworking, the concrete function of IWF is closely related with the kind of professional and network.

PS territory (Packet Swjtched Domain, packet-switched domain) be used for providing to the user connection of packet-type business, the PS territory mainly comprises: GSN (GPRS Support Node), BG (borde gateway), HLR/AuC (Home Location Register/authentication center), VLR (VLR Visitor Location Register), EIR (equipment identity register), MSC etc.Wherein, GSN comprises SGSN (Serving GPRS Support Node) and GGSN (Gateway GPRS Support Node), and is used to finish the transmission of Packet Service user's grouping bag; SGSN provides being connected of core net and wireless access system BSS, RNS, finishes the functions such as mobile management, session management of multicomponent data business, with management MS moving and communication service in the mobile network; GGSN is the interface between mobile communication system and other public data network, and simultaneously, GGSN also has the function of inquiring position information.In addition, SGSN and GGSN all provide charge information.BG be used to finish two between GPRS network intercommunication, guarantee the fail safe of network interworking.HLR is used to finish the management of user contracting data and positional information, user contracting data such as MSISDN, IMSI, PDP ADDRESS, signatory telecommunication service and supplementary service and the professional scope of application thereof etc., positional information such as MSRN, MSC/VLR number, SGSN number, GMLC etc.AUC is mainly used in storage user's authentication arithmetic and key.VLR is used to handle the various data messages of visitor.EIR is used to store customer equipment identification IMEI information.

IMS 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, and 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.Major function entity among the IMS comprise functions such as control user registration, session control conversation control 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 (MGCF) 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.

The IMS framework of 3GPP standard definition has solved the roam charge that the required solution of multimedia service is provided under the IP carrying comprehensively, QoS (service quality), 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 such as I-WLAN (Interworking ofWLAN at WLAN (WLAN (wireless local area network)), the WLAN intercommunication), fixed broadband inserts IMS such as FBI (Fixed Broadband accessto IMS, fixed broadband inserts IMS) and towards the all-IP net such as the AIPN subject studies such as (All-IPNetwork complete IP networks) 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, with what obtain to unify, the multimedia service that comprises VoIP (Voice over IP, IP-based voice) business etc.

At present, 3GPP has proposed the calling controlling schemes of the static anchor point (IMS control static anchoring) of a kind of IMS control, to solve in two territories, as CS territory and IMS territory, between the problem switched.The core concept of this scheme is, distribute one to have (Call Continuity Control Function at the IMS home domain for the user as CCCF, the call continuity controlled function) AS (Application Server, application server), for from the CS territory or all will being sent to this AS with this user-dependent call/session and carrying out grappling control (Anchoring control) of IMS territory.Like this, follow-uply no matter take place between CS territory to the territory in IMS territory to switch or the IMS territory takes place switches between the territory in CS territory, all the call/session of grappling is carried out follow-up switching controls and handle by this AS.

Just can in call path, insert an anchor point AS very easily for session control mode among the IMS itself session is controlled, promptly make session be toggled to AS by definition jFC (initial Filter Criteria, initial filter standard or norm).

And in call path, insert an anchor point AS not too easily for the calling control mode in CS territory itself, and therefore, the calling of initiating at the CS territory is toggled to the process of anchor point AS, and the 3GPP standard has been described multiple implementation at present, wherein:

The initial call of initiating when being the CS territory for Calling Side, promptly for Calling Side VMSC (Visited Mobile Switch Center, Visited Mobile Switching Center) receiving the calling of initiating behind the call setup message of UE, can there be network side route control { promptly to use CAMEL (mobile network strengthens the logical client application) scheme } and the end side route is controlled and { promptly used USSD (Unstructured Supplementary Service Data unstructured supplementary data traffic) and SIP Notify (Session Initial Protocol Notify, " notice " of session initiation protocol operated) and Prefix (prefix) scheme, three kinds of control models route the call to anchor point AS;

The initial call of initiating when being the CS territory for callee side, the GMSC that is called home network is after receiving the calling that comes from Calling Side, according to the calling that GMSC initiates after to the called party information analysis, can use CAMEL scheme and signaling catching scheme to route the call to anchor point AS.

This function that initial call is routed to anchor point AS is called NeDS (Network Domain Selection, selection function between the territory) function.For the CS territory, the entity with NeDS function can be gsmSCF; For the IMS territory, the entity with NeDS function can be an AS.Routing decision entity gsmSCF in the CS territory can be arranged in same physical entity with the routing decision entity A S in the IMS territory.

The cross-domain switching controls process of VCC (phone service continuity) user that adopts static anchor point scheme to finish once will be described below, as shown in Figure 1, when calling is initially set up, as the calling of UE (A) initiation at UE (B), then this calling is inserted an anchor point AS by gsmSCF or the AS with NeDS function in the call path of Calling Side UE (A), and this AS enables B2BUA (back-to-back user agent) function and is divided into AS in order to the calling with Calling Side and stops section and AS and initiate sections two sections.Described AS termination section is the call leg between UE (A)-AS, and described AS initiation section is the call leg between the AS-UE (B).

In follow-up process of calling out, UE (A ') detect when switching condition satisfies between the territory, wish that will the current calling of carrying out switching to UE (A ') from UE (A) carries out follow-up calling and control, UE this moment (A ') then initiates a new calling at the AS that grappling control is carried out in current calling, AS is after receiving this calling, judge in the time of to carry out switching between the territory, then AS initiates the new calling of initiating of UE (A ') and AS section to continue, discharge the calling of AS termination section then, like this, under the control of anchor point AS, make continuing that UE (A ') and same UE (B) carried out calling out, discharge the call leg between previous UE (A)-AS, finished UE (A) to the switching between the UE (A ').

Above-mentionedly this grappling control is carried out in calling, and the function of carrying out hand-off process between the territory when switch taking place is called CCCF (Cail cominuity Control Function, the call continuity controlled function) function, under static anchor point scheme, the entity with CCCF function is an AS in the IMS territory.

Wherein, have the routing decision point gsmSCF of NeDS function or AS and can be arranged in same physical entity with AS with CCCF function.

And the UE here (A) can be the terminal in CS territory, and UE (A ') can be the terminal in IMS territory, switches to the calling of UE (A ') by UE (A), the same calling that has realized user A from the CS territory to the call continuity the IMS territory.

Equally, when calling is initially set up, can in the call path of Calling Side UE (B), insert an anchor point AS, in order to the calling control of switching between the territory of realizing follow-up callee side.

When the user in CS territory makes a call as caller, and adopt network side route control model, i.e. the calling of using CAMEL mechanism to initiate in the CS territory is toggled to AS and carries out grappling, and then corresponding handling process specifically may further comprise the steps as shown in Figure 2:

Make a call at step 2-1, the UE that is registered to VMSC and to set up Setup message.

By Initial DP (Initial Detection Point) message calling is triggered among the gsmSCF with NeDS function according to the CAMEL Subscription Information of Calling Side to step 2-2, VMSC.

Generate a routing number IMRN (IMS Routing Number) who points to the AS in the IMS territory to step 2-3, gsmSCF with NeDS function, make VMSC route the call on this CCCF according to this routing number with CCCF function;

GsmSCF with NeDS function can pass through at the identification information CCCF of CCCF PSI (CCCF Public Service ldentities, the CCCF public service identity) appends methods such as Call Reference Number after and construct IMRN, then, by CAMEL connect (CAMEL connection) message IMRN is handed down to VMSC by gsmSCF with NeDS function.

Route the call to the MGCF (MGCF) in the IMS network of calling subscriber ownership by IAM (the full message of initial address) message according to IMRN to step 2-4, VMSC.

The called party information of judging in the IAM message to step 2-5, MGCF is to point to the IMRN of the AS with CCCF function, then send INVITE to I-CSCF, the called party information Requested-URI in this message (request resource is unified positioning mark) is the TEL URI of IMRN (URI of phone number format) form.

Inquire about routing iinformation according to Requested-URI to HSS to step 2-6, I-CSCF, obtain the AS address information that is associated with this IMRN, promptly have the AS address information of CCCF function, I-CSCF transmits INVITE to the AS with CCCF function then.Here, can return AS information according to the IMRN that comprises CCCF PSI information, in HSS, need to dispose CCCF PSI data with corresponding relation with AS address information of this CCCF function with CCCF function in correspondence in order to support HSS.

To step 2-7, have called party information that the AS of CCCF function receives and comprise the session of IMRN of CCCF PSI information after, grappling control is carried out in session, promptly trigger B2BUA (back-to-back user agent) function, stop AS and receive session, initiate a new session then at former called party information, the AS that promptly has the CCCF function is by obtaining the S-CSCF information of calling subscriber's side with the Sh interface of HSS, then, will talk about and route to S-CSCF, and will talk about by this S-CSCF and to route to former callee side.

Here, route the call in the process of former callee side at S-CSCF, when former called party information is the Tel-URI form, S-CSCF carries out ENUM DNS, and (E.164 Number Domain NameSystem E.164, the domain name converting system) translation function, if original called party number can be converted to SIP URI (URI of session initiation protocol) form, then follow-up calling route is carried out in the IMS territory, otherwise, S-CSCF routes the call to the BGCF (Breakout Gateway ControlFunction borde gateway controlled function) in this IMS territory, to call out finally by BGCF and to route to PSTN (public switched telephone network (PSTN)) or CS territory via MGCF, at last by PSTN or CS territory with call proceeding to called.When the AS with CCCF function enabled the B2BUA function, for the session that stops at CCCF with in the new session of initiating of CCCF, CCCF controlled to switch between the territory that may initiate subsequent user all to its maintenance state.

Because the calling subscriber visits the CS territory on ground and not necessarily supports CAMEL, therefore need consider that other alternative route the call to AS, provide in the standard of 3GPP at present under the end side route control model based on USSD with based on SIP Notify and based on three kinds of mechanism of Prefix (prefix).

Wherein, USSD mechanism is applied to UE and is not registered to the IMS territory, its basic principle is that UE is when VMSC makes a call, that the called address information in the call signaling is carried is the CCCF PSI that points to the AS with CCCF function, thereby VMSC routes the call to the AS that has the CCCF function in the IMS territory via MGCF.And real called party information, number information as UE (B), be in the USSD signaling that the gsmSCF with NeDS function sends, to carry by UE, like this, after the gsmSCF with NeDS function receives the USSD signaling, carry out alternately with AS with CCCF function, the real called party information of its current session that receives of notice CCCF, it is the number information that carries UE (B) in the USSD signaling, thereby the AS with CCCF function carries out grappling to the calling that the UE that receives initiates, be that AS starts the B2BUA function, stop AS and receive session, initiate a new session at former called party information then, the former called party information here obtains from the USSD signaling that the gsmSCF with NeDS function receives.Subsequent treatment is as described in the step 2-7 of Fig. 2, and the former called party information in the new session of initiating according to AS continues after will talking about and routing to the called subscriber.

When the user in CS territory made a call as caller, if adopt end side route control model, the calling of promptly using USSD mechanism to initiate was toggled to AS and carries out grappling, and then corresponding handling process specifically may further comprise the steps as shown in Figure 3:

At step 3-1, the UE that is registered to VMSC makes a call and sets up Setup message, the called party information of carrying among the setup is a number that comprises CCCF PSI information, and also carry the Call Reference Number that is used for call between unique identification UE and the CCCF that UE distributes in the message, the calling that VMSC initiates UE according to the called number that comprises CCCF PSI information routes among the AS with CCCF function via MGCF/I-CSCF;

Here, the calling that UE is initiated route to have CCCF function AS processing procedure with step 2-4～step 2-6 is similar.

To step 3-2, after UE receives the Call proceeding message that VMSC sends, UE initiates the USSD signaling with application model to VMSC, wherein carry the real called party information of this calling in the USSD signaling, and the Call Reference Number that UE distributes in step 3-1.

Transmit this USSD signaling to step 3-3, VMSC to HLR, HLR is to the USSD signaling process functional entity with CCCF function, transmit this USSD signaling as gsmSCF, have the AS that has the CCCF function among the USSD signaling process functional entity of CCCF function and the step 3-1 herein and can be same physical entity; According to the real called party information of calling and the Call Reference Number that carry in the USSD signaling that receives, AS and/or the association of USSD signaling process functional entity with CCCF function go out the session that receives among the step 3-1, and the called party information that step 3-1 is received in the session is updated to the real called party information of calling that the USSD signaling is carried.

To step 3-4, AS and/or USSD signaling process functional entity step 3-1 is received after called party information in the session upgrades, grappling control is carried out in session with CCCF function;

Here, it is similar with step 2-7 to have a processing procedure that the AS of CCCF function and/or USSD signaling process functional entity carry out grappling control to session.

Described SIP Notify mechanism is applied to UE and has been registered to the IMS territory, its basic principle is roughly consistent with USSD mechanism, be that UE is when VMSC makes a call, that the called address information in the call signaling is carried is the CCCF PSI that points to the AS with CCCF function, thereby VMSC routes the call to the AS that has the CCCF function in the IMS territory via MGCF.And real called party information, number information as UE (B), be that UE by the current IMS of being registered to territory carries in the SIPNotify signaling that the AS with NeDS function sends, like this, after the AS with NeDS function receives SIP Notify signaling, carry out alternately with AS with CCCF function, the real called party information of its current session that receives of notice CCCF, it is the number information that carries UE (B) in the SIP Notify signaling, thereby the AS with CCCF function carries out grappling to the calling that the UE that receives initiates, be that AS starts the B2BUA function, stop AS and receive session, initiate a new session at former called party information then, the former called party information here obtains from the SIP Notify signaling that the AS with NeDS function receives.Subsequent treatment is as described in the step 2-7 of Fig. 2, and the former called party information in the new session of initiating according to AS continues after will talking about and routing to the called subscriber.

When the user in CS territory made a call as caller, if adopt end side route control model, the calling of promptly using SIP Notify mechanism to initiate was toggled to AS and carries out grappling, and then corresponding handling process specifically may further comprise the steps as shown in Figure 4:

At step 4-1, identical with step 3-1.

To step 4-2, after UE receives the Call proceeding message that VMSC sends, UE sends SIP Notify signaling to the AS with CCCF function, wherein carry the real called party information of this calling in the SIP Notify signaling, and the Call Reference Number that UE distributes in step 4-1.

To step 4-3, according to the real called party information of calling and the Call Reference Number that carry in the SIP Notify signaling that receives, AS association with CCCF function goes out the session that receives among the step 4-1, and the called party information that step 4-1 is received in the session is updated to the real called party information of calling that SIP Notify signaling is carried.

To step 4-4, AS with CCCF function step 4-1 is received after called party information in the session upgrades, grappling control is carried out in session;

Here, the processing procedure that grappling control is carried out in session of the AS with CCCF function is similar with step 2-7.

In addition, be not registered to the IMS territory for both having can be applicable to UE based on prefix mechanism, but application domain UE has been registered to the IMS territory again, its basic principle is that UE is when VMSC makes a call, the CCCF PSI of AS that sensing is had the CCCF function is as real called party information, be carried at jointly in the called address information in the call signaling as a prefix of the number information of UE (B), thereby the VMSC basis is to the prefix information before the called number of territory, be that CCCF PSI will call out via MGCF and route to the AS that has the CCCF function in the IMS territory, thereby the AS with CCCF function carries out grappling to the calling that the UE that receives initiates, be that AS starts the B2BUA function, stop AS and receive session, initiate a new session then at former called party information.Resolve to obtain in the called party information of the former called party information here from the calling that the AS with NeDS function receives, the prefix that promptly has in the called party information in the calling that the AS of NeDS function will receive is peeled off, and recovers real called party information.Subsequent treatment is as described in the step 2-7 of Fig. 2, and the former called party information in the new session of initiating according to AS continues after will talking about and routing to the called subscriber.

Can see when making a call as caller, having control of network side route and end side route to control two kinds of patterns for the user in CS territory.For network side route control model, the calling that UE initiates is a common calling at real called party, and the CAMEL ability by network has the grappling that the AS of CCCF function calls out with call re-direction to; For end side route control model, need make amendment to the call logic of terminal, the calling that UE initiates is a special calling at the AS with CCCF function, and real called number is to carry in the USSD/SIP Notify signaling of AS with CCCF function and/or the transmission of USSD signaling processing entity at follow-up UE, or appending in the information after the prefix CCCFPSI carried in called party information, AS and/or USSD signaling processing entity with CCCF function upgrade the called party information of calling out according to the appending real called party information of carrying in the information afterwards of prefix CCCF PSI in USSD/SIP Notify signaling or the call signaling, then grappling are carried out in calling.

Like this, for call, UE can initiate common calling, perhaps also can initiate special calling.Therefore, what provide in the 3GPP standard at present is the scheme of two competitions based on the network side route controlling schemes of CAMEL with based on the end side route controlling schemes of USSD/SIP Notify/Prefix, be UE in case use end side route controlling schemes to make a call based on USSD/SIP Notify/Prefix, then promptly allow to support the Calling Side visit circuit-domain network of CAMEL ability, also can not adopt network side route controlling schemes this moment based on CAMEL.

Be subjected to the restriction whether caller visit circuit-domain network supports the CAMEL ability although consider network side route controlling schemes, because CAMEL scheme itself has had the application of comparative maturity based on CAMEL; Though and be not subjected to the restriction of caller visit circuit-domain network ability based on the end side route controlling schemes of USSD/SIP Notify/Prefix, itself belong to a kind of new scheme, application is not arranged at present as yet.

Therefore, wish to have a kind of scheme of two kinds of schemes being carried out fusion treatment, promptly support the situation of CAMEL to use network side route controlling schemes based on CAMEL in the Calling Side circuit-domain network, and only do not support to use under the situation of CAMEL end side route controlling schemes based on USSD/SIPNotify/Prefix in the Calling Side circuit-domain network, can not satisfy this demand but have corresponding scheme at present.

Summary of the invention

The purpose of this invention is to provide a kind of method and system of in continuity service of voice service, setting up initial call, thereby make and support the situation of CAMEL to use network side route controlling schemes, and do not support to use under the situation of CAMEL end side route controlling schemes in the Calling Side circuit-domain network based on USSD/SIP Notify/Prefix based on CAMEL in the Calling Side circuit-domain network.

The objective of the invention is to be achieved through the following technical solutions:

The invention provides a kind of method of in continuity service of voice service, setting up initial call, comprising:

Its enrollment status of user terminal notice application server of A, continuity service of voice service in circuit domain;

After B, described application server receive described notice, determine the mode that user terminal makes a call according to the route control model information of the circuit-domain network support of the current registration of user terminal, and informing user terminal;

C, when described user terminal is initiated circuit domain call, make a call according to the mode that makes a call of the notice of described application server.

Described steps A comprises:

Finish the position renewal of circuit domain when described user terminal after, then the mode by unstructured supplementary data traffic USSD or session initiation protocol notice SIP Notify or short message will include user terminal identification, the position is upgraded the message of finishing the circuit-domain network identification information of notifying indication information and the current registration of UE and sent to described application server.

Described application server comprises: the application server that includes call continuity controlled function CCCF.

In the described method, before carrying out described step B, also comprise:

D, application server receive position that user terminal sends upgrade finish notification message after, send the ATSI of CAMEL-Subscription-Information inquiry at any time message to the attaching position register HLR of user terminal;

After E, described HLR receive described ATSI message, return the user signing contract information of the route control model of the circuit-domain network support that comprises the current registration of user to application server, and carry out described step B;

Perhaps, before carrying out described step B, also comprise:

Application server is according to the circuit-domain network identification information data query configuration information of the current registration of UE that receives, obtain the route control model of the circuit-domain network support of the current registration of UE, and carry out described step B, described data configuration information comprises the route control model information that may support as each circuit-domain network of user terminal roaming place.

Described step B comprises:

B1, application server judge the circuit-domain network of the current registration of described user terminal whether the network enabled dypass be by control model, if, execution in step B2 then, otherwise, execution in step B3;

B2, application server informing user terminal make a call with the common call initiator formula of network side route control model correspondence;

B3, application server informing user terminal make a call with the call initiator formula of end side route control model correspondence.

In the method for the present invention:

Described network side route control model comprises: mobile network strengthens logical client application CAMEL route control model;

Described end side route control model comprises: unstructured supplementary data traffic USSD route controlling mechanism, SIP Notify route controlling mechanism and prefix Prefix route controlling mechanism.

Described step B1 comprises:

When application server judges that the circuit-domain network of the current registration of user terminal is supported CAMEL second stage CAMEL phase build 2 or later, determine that then the circuit-domain network of the current registration of this user is supported CAMEL route control model.

Described step B comprises:

Application server is specified the mode informing user terminal that makes a call by USSD or SIP Notify or short message.

Described method also comprises:

Location Area Identification after user terminal upgrades according to the position determines that it is not the position of moving exchanging center MSC/VLR Visitor Location Register VLR inside when upgrading that this position is upgraded, and carries out described steps A;

Perhaps,

After application server receives the position update notification message that user terminal sends, determine that according to the Location Area Identification of its preservation it is not the position of MSC/VLR inside when upgrading that this position of user terminal is upgraded, and then carries out described step C.

The present invention also provides a kind of system that sets up initial call in continuity service of voice service, comprises user terminal and application server, also comprises:

Notification module: be arranged in the described user terminal, be used for its enrollment status of user terminal notice application server in circuit domain;

Method of calling determination module: be arranged in the application server, be used under the triggering of the notification message that notification module is sent, route control model according to the circuit-domain network support of the current registration of user is determined the mode that user terminal makes a call, and informing user terminal;

Call out initiation module: be arranged in the user terminal, be used for the mode information that makes a call definite according to the method for calling determination module and that send and make a call.

In the described system, when described notification module is when being used for the position update notification module of informing user terminal location update message, then also to comprise:

Determination module is upgraded in the position: be provided with in user terminal or the application server, be used for determining according to the Location Area Identification after the renewal of position whether this position is upgraded is the position renewal of MSC/VLR inside, if, then not trigger position update notification module or method of calling determination module, otherwise, then trigger described position update notification module or method of calling determination module.

Described method of calling determination module comprises:

CAMEL-Subscription-Information acquisition module: the user signing contract information that is used for obtaining to the HLR of user terminal the route control model information of the circuit-domain network support that comprises the current registration of user by ATSI message, perhaps, obtain the route control model information of the circuit-domain network support of the current registration of user by the circuit-domain network identification information data query configuration information of the current registration of UE;

Method of calling determination module: be used for determining the routing module control that the user supports, and further determine the mode that user terminal makes a call according to described user signing contract information;

Method of calling notification module: the mode informing user terminal that the user terminal of determining is made a call.

As seen from the above technical solution provided by the invention, the present invention is in the static anchor point scheme of continuity service of voice service, when fixing among the AS with CCCF function for the call anchor that circuit domain user is initiated as caller, the invention provides propose a kind of for based on the end side route controlling schemes of USSD/SIPNotify/Prefix with carry out the scheme of fusion treatment based on two kinds of schemes of network side route controlling schemes of CAMEL, promptly support the situation of CAMEL to use network side route controlling schemes, and do not support to use under the situation of CAMEL end side route controlling schemes in the Calling Side circuit-domain network based on USSD/SIP Notify/Prefix based on CAMEL in the Calling Side circuit-domain network.

Therefore, realization of the present invention makes it possible to utilize substantially the CAMEL of Calling Side circuit domain to carry out the foundation of initial call and call anchor is fixed on the gsmSCF with CCCF function, guaranteed calling to be carried out the maturity of static grappling based on the Calling Side circuit domain of CAMEL scheme, utilize USSD/SIP Notify/Prefi * scheme as the replenishing of CAMEL scheme again simultaneously, avoided since the CAMEL scarce capacity of Calling Side circuit domain cause to calling out the failure of static grappling.

Description of drawings

Fig. 1 realizes that for adopting static anchor point VCC user strides the schematic diagram of switching controls;

Fig. 2 is the flow chart based on the network side route controlling schemes of CAMEL;

Fig. 3 is the flow chart based on the end side route controlling schemes of USSD;

Fig. 4 is the flow chart based on the end side route controlling schemes of SIP Notify;

Fig. 5 is the handling process schematic diagram of method of the present invention;

Fig. 6 is the structural representation of system of the present invention.

Embodiment

The present invention is mainly used in the static anchor point scheme of continuity service of voice service, in the time of in the call anchor that circuit domain user is initiated as caller need being fixed on gsmSCF with CCCF function and/or AS, for merging different route control models, control at the mode that user terminal makes a call, make user terminal to determine the mode that makes a call according to the route control model that current network side (being VLR) is supported, and initiate to set up initial call, so that support corresponding route control model neatly.

That is to say, core of the present invention provides a kind of for based on the end side route controlling schemes of USSD/SIP Notify/Prefix with carry out the scheme of fusion treatment based on two kinds of schemes of network side route controlling schemes of CAMEL, promptly support the situation of CAMEL to use network side route controlling schemes, only under the Calling Side circuit-domain network is not supported the situation of CAMEL, use end side route controlling schemes based on USSD/SIP Notify/Prefix based on CAMEL in the Calling Side circuit-domain network.Make it possible to utilize substantially the CAMEL of Calling Side circuit domain to carry out the foundation of initial call and call anchor is fixed on the gsmSCF with CCCF function, guaranteed calling to be carried out the maturity of static grappling based on the Calling Side circuit domain of CAMEL scheme; Simultaneously, can also utilize USSD/SIP Notify/Prefix scheme as the replenishing of CAMEL scheme, with avoid the CAMEL of Calling Side circuit domain scarce capacity cause to calling out the failure of static grappling.

To describe method of the present invention below, the present invention mainly comprises following processing procedure:

(1) UE that is positioned at the circuit domain and the VCC business of having contracted finishes its enrollment status at circuit domain (as VLR), be after the position is upgraded, the position of then notifying the application server user to finish circuit domain is upgraded, and wherein, described application server can be for having the application server of CCCF function;

In this process, described UE can by USSD or SIP Notify or the mode of short message notify have the CCCF function application server its carry out location update operations, wherein in the notification message that application server sends, need to carry the identification information of UE at UE, reaching this message of indication is that the information of finishing notice is upgraded in the position, further can also carry the circuit-domain network identification information of the current registration of UE;

(2) application server is after notification message is finished in the position renewal that receives VCC user, and the route control model information that the circuit-domain network of the current registration of user is supported is determined in inquiry;

Be specially: after application server receives that notification message is finished in the renewal of described position, HLR to user attaching sends ATSI (Any Time Subscription Interrogation, at any time CAMEL-Subscription-Information inquiry) message, HLR is after receiving ATSI message, return current VCC user's CAMEL-Subscription-Information, the CAMEL tenability (SupportedCAMEL phases in VLR, the CMAEL version of supporting among the VLR) that comprises the VLR of the current registration of UE in the described CAMEL-Subscription-Information.

In addition, can also be by the corresponding data configuration information of configuration in application server with CCCF function, described data configuration information comprises the CAMEL tenability information of all circuit-domain network that the user can roam, i.e. the route control model information supported of each circuit-domain network; Like this, described CCCF just can inquire about the route control model of the circuit-domain network support of determining the current registration of user, corresponding processing procedure is specially: CCCF obtains the CAMEL tenability of the circuit-domain network correspondence of the current registration of UE according to the circuit-domain network identification information data query configuration information of the current registration of UE that receives.

(3) after application server obtains the CAMEL tenability of circuit-domain network of the current registration of UE, if the circuit-domain network of the current registration of UE can be supported CAMEL, then application server notice UE adopts the call initiator formula of network route control model correspondence to initiate in the ordinary way when initiating circuit domain call, otherwise, if the circuit-domain network of the current registration of UE can not be supported the CAMEL ability, then application server notice UE terminal route control model when initiating circuit domain call is initiated in special mode, for example, adopt the call initiator formula of USSD/SIP Notify/Prefix route control model correspondence to make a call;

In this process, application server also can be by judging the CAMEL tenability of the circuit-domain network that obtains the current registration of UE to the CAMEL tenability of the VLR of the current registration of UE, the Supported CAMEL phases in VLR parameter indication VLR that receives when application server is specifically as follows: when can support CAMEL Phase build 2 or later, then notify UE when initiating circuit domain call, to initiate in the ordinary way, otherwise, when if the VLR of the current registration of UE can not support CAMELPhase 2, then application server notice UE initiates in the special mode shown in Fig. 3 and/or Fig. 4 when initiating circuit domain call;

In addition, in this process, described application server can by USSD or SIP Notify or the mode of short message notify UE when initiating circuit domain call in normal way or particular form initiate.Wherein, in the notification message that UE sends, needing to carry indication UE in normal way or the indication information that makes a call of particular form at application server.

(4) follow-up UE initiates according to common mode or particular form according to the indication of application server when initiating the calling of circuit domain;

This process is specially: as UE during in the calling of initiating circuit domain, if the indication information that application server is sent is when making a call according to common mode, then UE makes a call according to mode shown in Figure 2 in the prior art, if the indication information that application server is sent is when making a call according to particular form, then UE makes a call according to Fig. 3 of the prior art or mode shown in Figure 4.

Need to prove, UE not only can upgrade by occurrence positions between different MSC/VLR, can also under same MSC/VLR, upgrade by occurrence positions simultaneously, for example, upgrade in the position that renewal of the position of MSC/VLR inside and periodic location update etc. are under same MSC/VLR.Upgrade for the position under this same MSC/VLR, because MSC/VLR does not change, thereby the tenability of its CAMEL can not change, at this moment, if do not distinguish the position renewal of generation is that interior position renewal of same MSC/VLR or the position between the different MS C/VLR are upgraded, in case taken place just that the position is upgraded then sent the position update notification message to application server, cause the redundant accessing HLR of application server, increase the signaling traffic load of HLR.

Therefore, handle the performance of the system that influences, can no longer carry out the processing of said process (1) to process (4) for avoiding redundancy in the system.Be specially by UE or application server and upgrade, and stop follow-up processing procedure, to avoid the redundant influence of handling systematic function in the position that implementation (1) at first identifies under the same MSC/VLR to the processing procedure of process (4).

When because UE carries out the position more during the identification of new situation, then corresponding processing procedure (1) is:

(1) UE is after the position of finishing circuit domain is upgraded, with LAI (the Location Area Identification after this position renewal that obtains, Location Area Identification) LAI of storage compared after information and last position were upgraded, because a MSC/VLR address information and a LAI can have certain corresponding relation, therefore, if UE can derive identical MSC/VLR address information according to these two LAI, judge that then this position is updated to the position renewal in the MSC/VLR, do not send the position renewal and finish announcement information, stop subsequent processes to application server; Otherwise, if UE can not derive identical MSC/VLR address information, judge that then this position is updated to the position renewal between the MSC/VLR, then send the position renewal and finish announcement information to application server, continue to carry out subsequent processes.

When at the enterprising line position of application server more during the identification of new situation, then corresponding processing procedure (1) and processing procedure (2) are respectively:

(1) be positioned at contracting of circuit domain user's the UE completing place of VCC business upgraded after, notice application server user has finished the position of circuit domain and has upgraded, and need upgrade in this position to finish and carry the LAI information of storing after the renewal of UE current location is finished in the notification message;

(2) application server the position that receives VCC user upgrade finish announcement information after, this LAI is stored, and sends LAI information according to UE and finish notification message with last UE in the position renewal and provide LAI information to compare.If application server can be derived identical MSC/VLR address information according to these two LAI, then be judged to be this position and be updated to the interior position renewal of MSC/VLR, then application server does not send ATSI message to HLR, stops subsequent processes; Otherwise, if application server can not be derived identical MSC/VLR address information, then be judged to be the position that this position is updated between the MSC/VLR and upgrade, then application server sends ATSI message to HLR, continues to carry out subsequent processes.

For the present invention there being further understanding, describe the present invention below in conjunction with accompanying drawing.The specific implementation of the method for setting up initial call in continuity service of voice service provided by the invention as shown in Figure 5, this example is only with in the more new situation identification and adopt CCCF and HLR to carry out the mode that the ATSI operating interactive obtains the CAMEL tenability of circuit-domain network to be that example describes, specifically to comprise following treatment step of the enterprising line position of UE:

The position that the user of step 5-1, the VCC business of having contracted finishes circuit domain is new technological process more;

Step 5-2, the LAI after the position upgraded upgrade preceding LAI with the position and compare, if UE can derive identical MSC/VLR address information according to these two LAI, judge that then this position is updated to the position renewal in the MSC/VLR, then do not send the position renewal and finish announcement information to application server with CCCF function, present embodiment finishes, otherwise, execution in step 5-3;

In this step, be specially the LAI information of upgrading in LAI and the last position of storage before after position in LOCATION UPDATING ACCEPT (position is upgraded and the accepted) message that the MSC that receives is sent is upgraded and compare in position updating process;

Step 5-3, UE send the position renewal to the application server with CCCF function and finish notice;

Promptly, if UE can not derive identical MSC/VLR address information, judge that then this position is updated to the position renewal between the MSC/VLR, then UE sends the position renewal with USSD or SIP Notify means of signaling to the application server with CCCF function and finishes notification message, carry the identification information of UE in the message, as MSISDN (Mobile Subscriber International ISDN number), simultaneously, also needing carrying corresponding this message of indication is that the information of finishing notice is upgraded in the position;

Step 5-4, have a CCCF function application server the position that receives VCC user upgrade finish notice USSD/SIP Notify signaling after, send ATSI message according to the identification information of UE to the ownership HLR of UE;

Step 5-5, HLR are after receiving ATSI message, return the ATSI response message to application server with CCCF function, carry the CAMEL-Subscription-Information that returns current VCC user in the message, comprise the route control model information of the VLR support of the current registration of UE in the described CAMEL-Subscription-Information, be specially the information of whether supporting CAMEL route control model;

Supported CAMEL phases in VLR parameter in the current VCC user's that step 5-6, the application server with CCCF function return according to HLR the CAMEL-Subscription-Information is judged the CAMEL tenability of the VLR of the current registration of UE, if the VLR of the current registration of UE can support CAMEL Phase2 or above version, execution in step 5-7 then, otherwise, execution in step 5-8;

Step 5-7, the application server with CCCF function send USSD signaling or SIPNotify or short message to UE, and notice UE initiates when initiating circuit domain call in the ordinary way.Follow-up UE then makes a call according to prior art mode shown in Figure 2 when initiating the calling of circuit domain, and the present embodiment processing procedure finishes.

Step 5-8, the application server with CCCF function send USSD signaling or SIPNotify or short message to UE, and notice UE initiates in special mode when initiating circuit domain call.Follow-up UE then makes a call according to prior art Fig. 3 or mode shown in Figure 4 when initiating the calling of circuit domain, and the present embodiment processing procedure finishes.

The present invention also provides a kind of system that sets up initial call in continuity service of voice service, comprises user terminal and comprises the application server of CCCF function, and comprise:

Notification module: be arranged in the described user terminal, be used for its enrollment status of user terminal notice application server in circuit domain; This module can be position update notification module, specifically is used for when user terminal carries out location update operations or after finishing, notifies described application server;

Method of calling determination module: be arranged in the application server of the described CCCF of comprising function, be used under the triggering of the location update message that position update notification module is sent, route control model according to the circuit-domain network support of the current registration of user is determined the mode that user terminal makes a call, for example, mode is initiated in ordinary call shown in Figure 2, perhaps, and Fig. 3 and special call initiator formula shown in Figure 4, afterwards, notify described user terminal with the call initiator formula of determining;

Call out initiation module: be arranged in the user terminal, being used for the mode information that makes a call definite according to the method for calling determination module and that send makes a call, promptly this module is not described in the prior for another example like that, only make a call according to a kind of mode, but select corresponding call initiator formula to make a call, thereby be convenient to realize the fusion treatment of multiple route control model according to the route control model needs of the network support of reality;

Described method of calling determination module specifically comprises with lower module:

CAMEL-Subscription-Information acquisition module: be used for obtaining, or obtain the user signing contract information of the route control model information of the circuit-domain network support that comprises the current registration of user by the circuit-domain network identification information data query configuration information of the current registration of UE by the HLR of ATSI message to user terminal;

Method of calling determination module: be used for determining the routing module control that the user supports, and further determine the mode that user terminal makes a call according to described user signing contract information;

Method of calling notification module: the mode informing user terminal that the user terminal of determining is made a call.

For effectively avoiding the redundant efficient of handling the system that influences, system of the present invention also comprises:

Determination module is upgraded in the position: be provided with in user terminal or the application server, be used for determining according to the Location Area Identification after the renewal of position whether this position is upgraded is the position renewal of MSC/VLR inside, if, then not trigger position update notification module or method of calling determination module, otherwise, then trigger described position update notification module or method of calling determination module.

The present invention is in the static anchor point scheme of continuity service of voice service, when fixing among the AS with CCCF function for the call anchor that circuit domain user is initiated as caller, the invention provides propose a kind of for based on the end side route controlling schemes of USSD/SIP Notify/Prefix with carry out the scheme of fusion treatment based on two kinds of schemes of network side route controlling schemes of CAMEL, promptly support the situation of CAMEL to use network side route controlling schemes, only under the Calling Side circuit-domain network is not supported the situation of CAMEL, use end side route controlling schemes based on USSD/SIP Notify/Prefix based on CAMEL in the Calling Side circuit-domain network.Make it possible to utilize substantially the CAMEL of Calling Side circuit domain to carry out the foundation of initial call and call anchor is fixed on the gsmSCF with CCCF function, guaranteed calling to be carried out the maturity of static grappling based on the Calling Side circuit domain of CAMEL scheme, utilize the USSD/SIPNotify/Prefix scheme as the replenishing of CAMEL scheme again simultaneously, avoided the CAMEL of Calling Side circuit domain scarce capacity cause to calling out the failure of static grappling.

The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (12)

1, a kind of method of setting up initial call in continuity service of voice service is characterized in that, comprising:

Its enrollment status of user terminal notice application server of A, continuity service of voice service in circuit domain;

After B, described application server receive described notice, determine the mode that user terminal makes a call according to the route control model information of the circuit-domain network support of the current registration of user terminal, and informing user terminal;

C, when described user terminal is initiated circuit domain call, make a call according to the mode that makes a call of the notice of described application server.

2, the method for setting up initial call in continuity service of voice service according to claim 1 is characterized in that, described steps A comprises:

Finish the position renewal of circuit domain when described user terminal after, then the mode by unstructured supplementary data traffic USSD or session initiation protocol notice SIP Notify or short message will include user terminal identification, the position is upgraded the message of finishing the circuit-domain network identification information of notifying indication information and the current registration of UE and sent to described application server.

3, the method for setting up initial call in continuity service of voice service according to claim 1 is characterized in that, described application server comprises:

The application server that includes call continuity controlled function CCCF.

4, according to claim 1, the 2 or 3 described methods of in continuity service of voice service, setting up initial call, it is characterized in that, before carrying out described step B, also comprise:

D, application server receive position that user terminal sends upgrade finish notification message after, send the ATSI of CAMEL-Subscription-Information inquiry at any time message to the attaching position register HLR of user terminal;

After E, described HLR receive described ATSI message, return the user signing contract information of the route control model of the circuit-domain network support that comprises the current registration of user to application server, and carry out described step B;

Perhaps, before carrying out described step B, also comprise:

Application server is according to the circuit-domain network identification information data query configuration information of the current registration of UE that receives, obtain the route control model of the circuit-domain network support of the current registration of UE, and carry out described step B, described data configuration information comprises the route control model information that may support as each circuit-domain network of user terminal roaming place.

5, the method for setting up initial call in continuity service of voice service according to claim 4 is characterized in that, described step B comprises:

B1, application server judge the circuit-domain network of the current registration of described user terminal whether the network enabled dypass be by control model, if, execution in step B2 then, otherwise, execution in step B3;

B2, application server informing user terminal make a call with the common call initiator formula of network side route control model correspondence;

B3, application server informing user terminal make a call with the call initiator formula of end side route control model correspondence.

6, the method for setting up initial call in continuity service of voice service according to claim 5 is characterized in that:

Described network side route control model comprises: mobile network strengthens logical client application CAMEL route control model;

Described end side route control model comprises: unstructured supplementary data traffic USSD route controlling mechanism, SIP Notify route controlling mechanism and prefix Prefix route controlling mechanism.

7, the method for setting up initial call in continuity service of voice service according to claim 5 is characterized in that, described step B1 comprises:

When application server judges that the circuit-domain network of the current registration of user terminal is supported CAMEL second stage CAMEL phase build 2 or later, determine that then the circuit-domain network of the current registration of this user is supported CAMEL route control model.

8, the method for setting up initial call in continuity service of voice service according to claim 5 is characterized in that, described step B comprises:

Application server is specified the mode informing user terminal that makes a call by USSD or SIP Notify or short message.

9, the method for setting up initial call in continuity service of voice service according to claim 4 is characterized in that, described method also comprises:

Location Area Identification after user terminal upgrades according to the position determines that it is not the position of moving exchanging center MSC/VLR Visitor Location Register VLR inside when upgrading that this position is upgraded, and carries out described steps A;

Perhaps,

After application server receives the position update notification message that user terminal sends, determine that according to the Location Area Identification of its preservation it is not the position of MSC/VLR inside when upgrading that this position of user terminal is upgraded, and then carries out described step C.

10, a kind of system that sets up initial call in continuity service of voice service comprises user terminal and application server, it is characterized in that, also comprises:

Notification module: be arranged in the described user terminal, be used for its enrollment status of user terminal notice application server in circuit domain;

Method of calling determination module: be arranged in the application server, be used under the triggering of the notification message that notification module is sent, route control model according to the circuit-domain network support of the current registration of user is determined the mode that user terminal makes a call, and informing user terminal;

Call out initiation module: be arranged in the user terminal, be used for the mode information that makes a call definite according to the method for calling determination module and that send and make a call.

11, the system that in continuity service of voice service, sets up initial call according to claim 10, it is characterized in that, when described notification module is that then described system also comprises when being used for the position update notification module of informing user terminal location update message:

Determination module is upgraded in the position: be provided with in user terminal or the application server, be used for determining according to the Location Area Identification after the renewal of position whether this position is upgraded is the position renewal of MSC/VLR inside, if, then not trigger position update notification module or method of calling determination module, otherwise, then trigger described position update notification module or method of calling determination module.

12, according to claim 10 or the 11 described systems that in continuity service of voice service, set up initial call, it is characterized in that described method of calling determination module comprises:

CAMEL-Subscription-Information acquisition module: the user signing contract information that is used for obtaining to the HLR of user terminal the route control model information of the circuit-domain network support that comprises the current registration of user by ATSI message, perhaps, obtain the route control model information of the circuit-domain network support of the current registration of user by the circuit-domain network identification information data query configuration information of the current registration of UE;

Method of calling determination module: be used for determining the routing module control that the user supports, and further determine the mode that user terminal makes a call according to described user signing contract information;

Method of calling notification module: the mode informing user terminal that the user terminal of determining is made a call.