CN101128021A

CN101128021A - Transmission method and system for selective information in called user domain

Info

Publication number: CN101128021A
Application number: CN 200610109836
Authority: CN
Inventors: 赵鹏; 张朝辉
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-08-16
Filing date: 2006-08-16
Publication date: 2008-02-20
Also published as: WO2008022542A1

Abstract

The utility model relates to the IMS technique, in particular to a called subscriber region selecting information transmitting method and system, which solves the problem in the prior art that the relevant region selecting information of the called subscriber cannot be exchanged among the associative functional entities. The technical proposal of the utility model writes the session region selecting information into the relevant initial session information through the functional entity recognized from the session region selecting information, and sends the session region selecting information to the next associative functional entity, so that to realize the transfer of succeeding session region selections of relevant user active session through initial session request information, to realize the transfer of the succeeding region selections in current session by the response message established, and at last to realize the transfer of the regional selecting information. Therefore, the selective functional entity of progressive region can choose the succeeding region on the basis of the active session region selecting information. In this way, the rationality of the selecting result is promoted, the switching and control success ratio of the region switchover functional entity is improved, and the accurate charging is realized.

Description

Selective information in called user domain transmission method and system

Technical field

The present invention relates to IMS (IP Multimedia Subsystem, IP Multimedia System) technology, particularly a kind of selective information in called user domain transmission method and system.

Background technology

CS (Circuit Switched, circuit switching) GSM (Global System for MobileCommunications, global system for mobile communications) and the successful Application of CDMA (Code Division MultipleAddressing, code division multiple access) technology mobile voice service is popularized in the whole world.Along with the growth of data traffic requirement and the continuous breakthrough of packet radio technology, the IMS framework of fusion makes under the condition with WLAN covering provides popular GSM audio call to become possibility.If (comprise WLAN (Wireless Local Area Network in CS territory and IP-CAN, WLAN (wireless local area network)), various wireless access networks etc.) realize seamless voice call service down, not only can alleviate GSM/UMTS (Universal MobileTelecommunications System, universal mobile telecommunications system) load of Radio Resource also can increase the income of operator.In addition, provide wired operator of VoIP (Voice over IP, Voice over IP) service also can provide fused business to be benefited by the IMS framework.

Continuous voice call refers to ongoing voice conversation on the multimode terminal, can switch between the heterogeneous networks territory.In order to switch, implement control with regard to needing in the network a concentrated point.The calling of VCC (VoiceCall Continuity, audio call is continuous) Client-initiated or acceptance all will anchor to this control point, so that handle handoff request, and discharges the calling that cuts out the territory after switching is finished.

In continuous voice call, because the user can be simultaneously in a plurality of network domains registrations, so when network processes went into to call out, call proceeding was carried out for the user in the territory that also need be chosen in that registration.The general foundation of judging comprises that registration scenarios, the VCC User Activity of user in network call out the strategy that information, operator are selected in the territory of continuing at place, user's preference, the ability of terminal and IP-CAN (IP Connectivity AccessNetwork, IP connects access network, wherein: IP is Internet Protocol, IP Internet Protocol) ability of carrying real-time voice business etc.

As shown in Figure 1, the IMS framework mainly comprises following functional entity:

VCC UE (Voice Call Continuity, voice call continuity user equipment);

VMSC (Visit Mobile Switching Center, Visited Mobile Switching Center);

GMSC (Gateway Mobile Switching Center, gateway MSC);

MGCF (Media Gateway Control Function, MGCF);

HSS (Home Subscriber Server, home signature user server);

GsmSCF (Service Control Function, service control function);

PLMN/PSTN:Public Land Mobile Network/Public Switched TelephoneNetwork, shared land mobile network/shared switched telephone network);

CSCF (Call Session Control Function, CSCF), this functional entity can be divided into: P-CSCF (Proxy-CSCF, proxy CSCF); I-CSCF (nterrogating-CSCF, inquiry CSCF); S-CSCF (Serving-CSCF, serving CSCF).

Wherein, in session control, the function of the main execution of following function entity has:

VCC UE: the signatory terminal that the VCC business is arranged, possess the ability that has a plurality of territories to insert, can realize the VCC business;

MGCF:, be responsible for the conversion of ISUP signaling and SIP signaling for the entity that user and the IMS user of CS or PSTN carries out intercommunication;

P-CSCF: for IMS user provides access service;

I-CSCF: querying server, being used for registration of IMS territory and calling provides inquiry service;

Carry out the entity of conversational services in the S-CSCF:IMS territory.

Connect by the corresponding standard interface between each functional entity, for example: A/Iu, Gm, CAP, ISUP, Mg, Mw etc.

3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) and 3GPP2 normal structure all propose a kind of mechanism that realizes call continuity control based on the IMS network.Wherein the embodiment of 3GPP is: newly-increased in IMS territory and CS territory as next group functional entity, be collectively referred to as the VCC application entity:

DTF (Domian Tranfer Function, territory handoff functionality) entity (FE-A among Fig. 1) is exactly a centralized control point in the above-mentioned network.Be responsible for calling out, when switching generation, carry out switching controls in the grappling of IMS territory; Also be responsible for the domain information at maintenance activity session place, for selecting service in follow-up territory;

CS territory adaption function entity (FE-B among Fig. 1) is responsible for calling that CS starts and the calling that switches to the CS territory and enters the IMS network agency is provided;

CAMEL service application entity (FE-C among Fig. 1) is responsible for that circuit domain call is redirected to the IMS territory and is called out grappling control.FE-C can close with the gsmSCF among the figure generally speaking and establish, and is presented as a SCP (Service Control Point, service control point) in circuit domain;

DSF (Domain Selection Function, the territory selection function) entity (FE-D among Fig. 1), be responsible in the IMS territory according to user's login state, obtain the strategy that information, operator are selected in VCC User Activity conversation switching territory from DTF, the various strategies such as ability of user's preference, the ability of terminal and IP-CAN carrying real-time voice business are made a strategic decision and controlling call is routed to the selected territory of continuing.

In the prior art in common VCC user's the session called connection territory select flow process as shown in Figure 2, comprise the steps:

S201, called subscriber's S-CSCF has received initial session foundation request, URI (Universal Resource Identifier in this request, the unified resource sign) can be phone unified resource identifier TelURI or SIP (Session Initial Protocol, Session initiation Protocol) unified resource identifier SIP URI form;

S202, S-CSCF be according to the user signing contract information that obtains in the register flow path, and the INVITE that VCC user is sent is forwarded to DTF and handles;

S203, DTF judge to call out and belong to called handling process, and should call out according to strategy decision grappling;

S204, DTF transmit back S-CSCF with INVITE;

S205, S-CSCF be according to the user signing contract information that obtains in the register flow path, if for the VCC user conversation then determine to call the DSF function, transmits INVITE to DSF;

S206, DSF select this calling that continues of the network domains of called subscriber's registration according to relevant information;

The general relevant information of judging comprises that registration scenarios, the VCC business activity of user in network call out the continue strategy of domain information, operator of place, user's preference, the ability of terminal and IP-CAN (IPConnectivity Access Network, IP connects access network, wherein: IP is Internet Protocol, IP Internet Protocol) ability of carrying real-time voice business etc.

If caller is initiated INVITE by the CS territory, it is IMS territory number that DSF also needs the number translated with INVITE.

S207, DSF turn back to S-CSCF with INVITE to be continued to handle;

S208, S-CSCF continue INVITE is forwarded to the territory of continuing of selection according to INVITE;

First problem that exists in the above-mentioned flow process is, do not solve DSF how with the result of its processing, i.e. the conversation switching domain information that this session of called subscriber relates to is notified DTF.DTF just can't know that the calling of current grappling is finally continued in that territory like this, after other calling is triggered to the DTF grappling, if need carry out the territory selects to handle, the continuous territory of cut-grafting was really called out in grappling before then DTF can't provide, and caused DSF can't guarantee that latter two calling earlier continues in same territory.According to the processing of VCC, so just can't guarantee calling of some supplementary service, influenced user's business experience.In addition on the one hand, call out at same area not and continue and to mean the rate that payment is different to the user.And the DTF entity is responsible for VCC user's calling service process is chargeed as centralized control point, if DTF can not obtain final territory selection result, charge information just can't guarantee correctly, may cause the serious consequences such as complaint of user to the network operator.

Second problem that exists in the above-mentioned flow process is, DTF is not gone up called subscriber's correlated activation session territory selection information of preserving and pass to DSF, like this, according to the processing of VCC, will cause DSF can't guarantee this calling and continue in same territory being in of DTF grappling dynamic calling the alive.Thereby some relates to the supplementary service of many session/call, just can't provide in some territories as Call Waiting etc., has influenced user's business experience.

In the 3GPP technology, the territory selection function among the VCC (DSF embodies in the FE-D entity) is just at the continue selection in territory of the calling of phonetic element.Along with the continuous evolution of network, may relate to multiple medium composition in the session, as video, data, voice, text etc.Some professional and application requirements are to the continue selection in territory of the heterogeneity of multimedia call, as CSI (Combination of CS and IMSservices, circuit switching and IP Multimedia System synthesize).

CSI be a kind of with CS carrying real-time media and the synthetic technology that offers the user of calling of the non-real time media of IMS carrying, promptly the user can use CS territory and the carrying of IMS territory simultaneously.What the user obtained by the CSI technology is a kind of experience of multimedia call.When called, what CSI-AS needed to receive splits out the real-time media composition and the non-real time media composition continues respectively to media session in CS and IMS territory, offers the user by terminal is synthetic then.

In the prior art in the multimedia VCC business called connection territory select flow process as shown in Figure 3, comprise the steps:

S301, called subscriber's S-CSCF has received multimedia initial session foundation request;

S302, S-CSCF are forwarded to DTF according to service logic with INVITE and handle;

S303, DTF judge to call out and belong to called handling process, and should call out according to strategy decision grappling;

S304, DTF transmit back S-CSCF with INVITE;

S305, S-CSCF determine to call the DSF function according to service logic, transmit INVITE to DSF;

S306, DSF are according to this calling that continues of the network domains of user of above-mentioned Information Selection registration;

Returning INVITE after S307, DSF will handle continues to handle to S-CSCF;

S308, S-CSCF be according to the user signing contract information that obtains in the register flow path, and the INVITE that VCC user is sent is forwarded to CSI-AS and handles;

S309, CSI-AS split the medium composition in the Multimedia session, and the non-real time media composition continues in the IMS territory, and the real-time media composition continues in the CS territory;

S3010-S3011, CSI-AS be according to split result, respectively by S-CSCF to the foundation that makes a call of two territories;

When if the terminal of considering the called subscriber has the CSI characteristic, DSF just needs to be concerned about the situation in territory that finally continues of the different medium compositions in the session, and is not only the territory situation that continues of session.Problem is may continue in different territories after Multimedia session splits through CSI-AS, is a Multimedia session and DSF sees, and this session convergent point (being CSI-AS) that just need comprise different medium compositions is handled.But both do not provided the mechanism that CSI-AS notifies the territory selection information that continues of each medium composition in this session of called subscriber DSF in the prior art, do not provide the mechanism that DSF notifies DTF equally, and DTF transmits the mechanism that information is selected in user's correlated activation session territory to DSF.

Summary of the invention

The invention provides a kind of selective information in called user domain transmission method and system, in order to solve the problem that can't make mutual called subscriber's domain of dependence selection information between the related functional entities that exists in the prior art.

For solving the problems of the technologies described above, the invention provides following technical scheme:

A kind ofly set up in the flow process method of transmitting selective information in called user domain, comprise the steps: in session

When the functional entity of knowing selective information in called user domain is received the relevant initial session message that sends step by step, selective information in called user domain write described relevant initial session message after, transmit again that handle should relevant initial session message;

After the functional entity that writes the follow-up process of relevant initial session message of selective information in called user domain goes out selective information in called user domain from this relevant initial session message extraction, continue again to transmit that handle should relevant initial session message.

Wherein, one embodiment of the present invention are:

Information is selected in the territory of all correlated activation sessions of having set up before the called subscriber of described selective information in called user domain for this session;

Described relevant initial session message is that initial session is set up request message.

Know that described called subscriber's correlated activation session territory selects information and it is write described initial session that to set up the functional entity of request message be territory switching control function entity DTF;

Set up the request message from initial session and to extract described initial session and set up the functional entity of request message and comprise: territory selection functional entity DSF and/or circuit switching and IP Multimedia System synthesize application server CSI-AS.

DSF selects this conversation switching territory with reference to described correlated activation session territory selection information for the called subscriber; And/or CSI-AS becomes the component selections territory of continuing with reference to described correlated activation session territory selection information for the called subscriber selects each medium in this session.

Wherein, another embodiment of the invention is:

Described selective information in called user domain is selected information for the territory that this session of setting up relates to;

Described relevant initial session message is that initial session is set up response message.

The territory selection information that described this session relates to comprises this conversation switching domain information that DSF selects;

And:

Know described this conversation switching domain information and it write described initial session that to set up the functional entity of response message be DSF.

When described session was Multimedia session, the territory selection information that described this session relates to comprised in this session that CSI-AS selects each medium composition domain information that continues; And:

Know continue domain information and it is write described initial session set up the functional entity of response message and comprise CSI-AS of described each medium composition.

The described territory of knowing that this session relates to is selected information and it is write described initial session to set up the functional entity of response message and also comprise: control gateway functional entity MGCF or proxy call conversation control function entity P-CSCF.

Setting up the territory that described this session of extraction relates to the response message from described initial session selects the functional entity of information to comprise DTF.

In the header field that in above-mentioned two kinds of methods, described selective information in called user domain is written in the message body of relevant initial session message, defined in the message header or in the message header in the header field of redetermination.

A kind ofly set up in the flow process system that transmits selective information in called user domain, comprising in session:

First functional entity, know behind the selective information in called user domain selective information in called user domain write described relevant initial session message after, transmit to subordinate's functional entity again that handle should relevant initial session message;

Second functional entity, go out selective information in called user domain from the relevant initial session message extraction of receiving after, continue again to transmit that handle should relevant initial session message.

First kind of primary structure is:

Described first functional entity is DTF, and the territory selection information of all correlated activation sessions of having set up before the called subscriber with this session writes initial session and sets up request message, transmits this initial session of processing then and sets up request message;

Described second functional entity is DSF and/or CSI-AS, transmits to handle this initial session and set up request message after initial session is set up the request message territory selection information of all correlated activation sessions of extracting the called subscriber.

Described DTF comprises:

First memory, information is selected in the territory of all correlated activation sessions of having set up before the storage called subscriber;

The first request message processing unit extracts called subscriber's correlated activation session territory and selects information from described first memory, and it is write initial session sets up request message, transmits then to handle this initial session and set up request message;

Described DSF and/or CSI-AS comprise:

The second request message processing unit is set up extraction called subscriber correlated activation session territory selection information the request message from described initial session, transmits this session of processing then and sets up request message.

Second kind of primary structure is:

Described first functional entity comprises: the first response message processing unit, and the territory selection information that this session that will know relates to writes initial session and sets up response message, transmits this initial session of processing then and sets up response message;

Described second functional entity comprises: the second response message processing unit, and set up the territory that this session of extraction relates to the response message from initial session and select information, transmit this initial session of processing then and set up response message.

Described first functional entity is DSF, and this DSF also comprises:

Conversation switching territory selected cell connects the described first response message processing unit, for the called subscriber selects this conversation switching territory;

Described first functional entity is CSI-AS, and this CSI-AS also comprises:

The medium composition territory selected cell that continues connects the described first response message processing unit, for each medium in this session become the different territory of continuing of component selections;

Described first functional entity is MGCF or P-CSCF;

Described second functional entity is DTF, and this DTF also comprises:

First memory is stored the territory that this session that the described second response message processing unit extracts relates to and is selected information.

Described DSF and CSI-AS merge setting.

The present invention also provides a kind of method of transmitting selective information in called user domain, comprises the steps:

DTF subscribes to the selective information in called user domain of VCC user conversation to DSF and/or CSI-AS;

DSF and/or CSI-AS the VCC user conversation set up in the process or after session set up, the relevant selective information in called user domain that this session is related to sent to DTF.

Wherein, described method also comprises:

DSF sends this conversation switching domain information in the described selective information in called user domain to DTF; And/or

CSI-AS sends the domain information that continues of each medium composition in this session in the described selective information in called user domain to DTF.

Realize a kind of system that transmits selective information in called user domain of said method, comprising:

DTF is to the selective information in called user domain of DSF and/or CSI-AS subscription VCC user conversation;

DSF and/or CSI-AS, the VCC user conversation set up in the process or after session set up, the relevant selective information in called user domain that this session is related to sent to DTF.

Described DSF comprises:

Conversation switching territory selected cell is for the VCC user conversation is selected this conversation switching territory;

First information transmitting element sends this conversation switching domain information to DTF;

Described CSI-AS comprises:

The medium composition territory selected cell that continues is selected the domain information that continues of each medium composition in this session for the VCC user conversation;

Second information transmitting unit sends the domain information that continues of each medium composition in this session in the described selective information in called user domain to DTF;

Described DTF comprises:

Subscriber units is to the selective information in called user domain of DSF and/or CSI-AS subscription VCC user conversation;

Information receiving unit receives the relevant selective information in called user domain that DSF and/or CSI-AS send.

When DTF simultaneously when DSF subscribes to relevant selective information in called user domain with CSI-AS, DSF and CSI-AS merge setting.

Beneficial effect of the present invention is as follows:

Technical solution of the present invention selects the functional entity of information that selection information in session territory is write in the relevant initial session message by knowing the session territory, selection information in session territory is passed to the related functional entities of the follow-up process of this message.Realize that transmitting called subscriber's active session territory by the initial session request message selects information, select information by setting up the territory that this session of response message transmission user relates to, thereby set up the transmission that has realized selective information in called user domain in the flow process in session.

Especially, carry out the functional entity that the territory is selected or medium split and to have improved the reasonability of selection result with reference to the territory of continuing of selection this session of Information Selection of called subscriber's active session territory or each medium composition; The functional entity that carries out switching controls and charging control can upgrade user's territory selection information at any time, thereby improves the success rate of switching controls, and realizes accurate the charging.

Description of drawings

Fig. 1 is existing IMS configuration diagram;

Fig. 2 selects schematic flow sheet for called connection territory in the existing common VCC user conversation;

Fig. 3 selects schematic flow sheet for called connection territory in the existing multimedia VCC user conversation;

Fig. 4 transmits the main schematic flow sheet of the embodiment one of this conversation switching domain information for realization of the present invention;

Fig. 5 transmits each medium composition of this session territory of continuing for realization of the present invention and selects the main schematic flow sheet of the embodiment two of information;

Fig. 6 transmits the main schematic flow sheet that the embodiment three of information is selected in this conversation switching territory for realization of the present invention;

Fig. 7 transmits the main schematic flow sheet that the embodiment four of information is selected in this conversation switching territory for realization of the present invention;

Fig. 8 is that the main schematic flow sheet that the embodiment five of information is selected in user's correlated activation session territory is transmitted in realization of the present invention;

Fig. 9 transmits system's primary structure schematic diagram that information is selected in this conversation switching territory for realization of the present invention;

Figure 10 is that system's primary structure schematic diagram that information is selected in user's correlated activation session territory is transmitted in realization of the present invention;

Figure 11 and Figure 12 are respectively a kind of concrete structure schematic diagram of first functional entity in the system shown in Figure 10;

Figure 13 is a kind of concrete structure schematic diagram of second functional entity in the system shown in Figure 10;

Figure 14 directly subscribes to the main schematic flow sheet that information is selected in this conversation switching territory to DSF for DTF of the present invention;

Figure 15 directly subscribes to the main schematic flow sheet that information is selected in this conversation switching territory to CSI-AS for DTF of the present invention;

Figure 16 is for realizing system's primary structure schematic diagram of direct subscribing manner of the present invention.

Embodiment

The present invention proposes following total technical conceive for solving problems of the prior art:

On the basis of above-mentioned total technical conceive, select the transmission of information for solving the domain of dependence that DSF relates to this session of DTF, the technology of the present invention design can be by following two steps realization:

The first step, set up when knowing in the request process that the domain of dependence that this session relates to selects the functional entity of information to receive that the initial session that returns is step by step set up response message at the initial session that sends the continuous VCC user conversation of described audio call step by step, the domain of dependence selection information that described this session is related to writes described initial session and sets up to transmit behind the response message again and handle this initial session and set up response message;

Second step, write the domain of dependence that this session relates to and select the initial session of information to set up in the functional entity of the follow-up process of response message, the functional entity of not knowing the domain of dependence selection information that this session relates to is transmitted the described initial session of processing again and is set up response message after the initial session of receiving is set up the domain of dependence selection information that described this session of extraction relates to the response message.

The domain of dependence selection information that this session relates to comprises: this conversation switching domain information that DSF selects and CSI-AS become the medium composition of the component selections domain information that continues for each medium in this session.

Describe above-mentioned technical conceive below in conjunction with accompanying drawing in detail with concrete example.

The called subscriber that embodiment one, DSF the choose territory of continuing is IMS, and present embodiment is realized the transmission of this conversation switching domain information that DSF selects

As shown in Figure 4, comprise the steps:

The called service flow process of S401～S404, VCC, INVITE is delivered to DSF;

It is this conversation switching territory that S405, DSF select IMS, and handles INVITE according to this conversation switching territory, sends to S-CSCF then;

The SIP session signaling that this flow process is used, this conversation switching domain information can be written in the sip message head or message body in the INVITE, if write in the message header, can write in the header field that has defined, for example: Request-Disposition:IMS; Certainly, also can carry this conversation switching domain information by a self-defined special-purpose header field.

S406～S407, S-CSCF send to the IMS territory with INVITE, and response message is set up in the session that reception is returned;

S408, S-CSCF set up response message with session and return to DSF;

S409, DSF return to S-CSCF again after this conversation switching domain information that writes selection in the response message is set up in session;

The SIP session signaling that this flow process is used, this conversation switching domain information can be written in the sip message head or message body in the response message, if write in the message header, can write in the header field that has defined, also can carry this conversation switching domain information by a self-defined special-purpose header field, for example: define special-purpose header field a:IMS/CS.

The session that S409, S-CSCF will write this conversation switching domain information is set up response message and is transmitted to DTF;

The session that S4010, S-CSCF will write this conversation switching domain information is set up response message and is transmitted to DTF;

S4011～S4012, DTF set up the response message from session and continue to send response message to call subscriber terminal by S-CSCF again after this conversation switching domain information is extracted in the relevant position.

Response message can be 183 message, also can be 200 message, perhaps all carries out above-mentioned processing according to technical scheme provided by the invention in two response messages.

Embodiment two, session are Multimedia session, and then to select the IMS territory be the conversation switching territory to DSF, and CSI-AS carries out deconsolidation process again to session, and present embodiment can be realized transmitting CSI-AS and become the medium composition of the component selections domain information that continues for each medium in this session

As described in Figure 5, comprise the steps:

The called service flow process of S501～S504, VCC, INVITE is delivered to DSF;

It is this conversation switching territory that S505, DSF select the IMS territory, and handles INVITE according to selection result, sends to S-CSCF then;

Because session is a Multimedia session, DSF can only select the IMS territory to continue.

The SIP session signaling that this flow process is used, this conversation switching domain information can be written in the sip message head or message body of INVITE, if write in the message header, can write in the header field that has defined, for example: Request-Disposition:IMS; Certainly, also can carry this conversation switching domain information by a self-defined special-purpose header field.

S506～S507, S-CSCF are according to service logic, INVITE is transmitted to CSI-AS, after CSI-AS has received request message, Multimedia session is carried out deconsolidation process, select the real-time media composition to continue in the CS territory, the non-real time media composition continues in the IMS territory, the INVITE after splitting by the S-CSCF forwarding respectively then;

S508, SCSCF return CS territory and IMS domain response forwards to CSI-AS;

S509～S5011, CSI-AS have received response message, may be from same area not, CSI-AS merges response message, in response message, increase multimedia composition session then, generally write in the SDP header field, describe in the part header field of video or audio service attribute, for example: partly increase the description of a:IMS at the header field of describing the video traffic attribute, partly increase the description of a:CS at the header field of description audio service attribute.

Certainly, also can be increased in the header field or message body of sip message.

After S5012～S5013, DSF have received response message, can add equally and go up own selected medium composition this response message of forward pass that continues behind the domain information and give DTF;

Similar with embodiment one, the DSF domain information that each medium composition can be continued writes in sip message head or the message body.

S5013, DTF set up the response message relevant position from session and extract the medium composition and continue and continue to send response message to call subscriber terminal by S-CSCF again behind the domain information.

Finally, comprise two kinds of domains of dependence selection information that this session relates in the response message, a kind of is the session input field information of being selected by DSF, and another kind is by each medium composition that CSI-AS selects domain information that continues, and each medium composition that DTF selects with final CSI-AS domain information that continues is as the criterion.

Equally, response message can be 183 message, also can be 200 message, perhaps all carries out above-mentioned processing according to technical scheme provided by the invention in two response messages.

In the foregoing description, if select the CS territory to continue, INVITE and corresponding response message mutual between S-CSCF and the CS territory all must be transmitted through MGCF, and at this moment, MGCF also can write the domain information that continues accordingly in the response message.

Embodiment three, DSF select the CS territory to be the called subscriber territory of continuing

As shown in Figure 6, comprise the steps:

The called service flow process of S601～S604, VCC, INVITE is delivered to DSF;

S605, DSF select the CS territory to be the territory of continuing, and handle INVITE according to selection result, send to S-CSCF then;

S606, S-CSCF send to the CS territory with INVITE by MGCF;

MGCF can know that by the INVITE of transmitting the territory of continuing that DSF selects for this session comprises the CS territory;

After S607, MGCF receive returning session and setting up response message of CS territory, return to S-CSCF after in this response message, writing the CS domain information;

The SIP session signaling that this flow process is used can if write in the message header, can write in the header field that has defined, for example: header field p-visited-network-id:CS being written in the sip message head or message body of response message; Certainly, also can carry by a self-defined special-purpose header field.

S608, S-CSCF set up response message with session and return to DSF;

S609, DSF return to S-CSCF again after the session input field information that writes selection in the response message is set up in session;

The session that S6010, S-CSCF will write the session input field information of selection is set up response message and is transmitted to DTF;

The session that S6011, S-CSCF will write the session input field information of selection is set up response message and is transmitted to DTF;

S6011～S6012, DTF set up the response message from session and continue to send response message to call subscriber terminal by S-CSCF again after the relevant position extraction session input field information.

In the foregoing description, if select the IMS territory to continue, INVITE and corresponding response message mutual between S-CSCF and the IMS territory all must be transmitted through P-CSCF, and at this moment, P-CSCF also can write the IMS domain information in the response message.

Example four, DSF select the CS territory to be the called subscriber territory of continuing

As shown in Figure 7, S-CSCF sends INVITE by P-CSCF to the IMS territory, and P-CSCF returns to S-CSCF write the IMS domain information in the response message that the IMS territory is returned after.

The SIP session signaling that this flow process is used can if write in the message header, can write in the header field that has defined, for example: header field p-visited-network-id:IMS being written in the sip message head or message body of response message; Certainly, also can carry by a self-defined special-purpose header field.

Other each step and embodiment three are identical.

Further on the basis of aforementioned total technical conceive, for solving the transmission of DTF to VCC user's correlated activation session territory selection information of DSF/CSI-AS, the technology of the present invention design can realize by following two steps:

The first step, know that called subscriber's correlated activation session territory selects the functional entity DTF of information when the initial session of receiving the VCC user conversation of transmitting is step by step set up request, described called subscriber's correlated activation session territory selection information is write this initial session set up in the request, send to next stage functional entity DSF/CSI-AS again;

Second step, next stage functional entity DSF/CSI-AS receive when described initial session is set up request, therefrom extract called subscriber's correlated activation session territory selection information after, continue again to transmit and handle described initial session and set up request.

The conversation switching domain information that comprises the correlated activation session in called subscriber's correlated activation session territory selection information.If comprise Multimedia session in the session of described called subscriber's correlated activation, can also comprise in the Multimedia session each medium composition domain information that continues in described called subscriber's correlated activation session territory selection information.

Below still with specific embodiment and be described with reference to the accompanying drawings:

Embodiment five, DTF use the SIP header field that correlated activation session territory selection information is passed to DSF

As shown in Figure 8, comprise the steps:

S801～S802, S-CSCF have received INVITE, and it is forwarded to DTF.

S803, DTF receive INVITE, and correlated activation session territory selection information is write INVITE, send INVITE then to S-CSCF.

For example: use the parameter in the from header field to indicate called subscriber's correlated activation session territory to select information, From:＜sip:user1_public1@home1.net 〉; Tag=171828; 3gpp-cs; Perhaps use the information of preference header field indication current activity domain, Request-Disposition:3gpp-cs.

S804, S-CSCF forward to DSF with message, and DSF just can be known correlated activation session territory selection information according to the parameter in the from header field.

Example six: DTF uses the sip message body that correlated activation session territory selection information is passed to DSF

Concrete steps are identical with embodiment five, and difference is to use message body indication correlated activation session territory to select information, content can comprise a plurality of active session signs with and the territory, place, for example in message body, increase the content of following boldface type part:

....

Content-Length:(...)

<？xml?version＝″1.0″？>

<activedomain?xmlns＝″urn:ietf:params:xml:ns:activedomain″>

</dialogid>

<mline>

<type>video</type>

</mline>

<mline>

<type>audio</type>

</mline>

</dialogid>

</activedomain>

In like manner, DTF can pass to CSI-AS with the territory selection information of VVCC User Activity session.

As shown in Figure 9, realize that the present invention transmits this session territory and selects the system of information need comprise following two kinds of functional entitys:

First functional entity 901, know behind the selective information in called user domain selective information in called user domain write described relevant initial session message after, transmit to subordinate's functional entity again that handle should relevant initial session message;

Second functional entity 902, go out selective information in called user domain from the relevant initial session message extraction of receiving after, continue again to transmit that handle should relevant initial session message.

If called subscriber's active session territory selection information that DTF is preserved passes to DSF or CSI-AS, then:

Described first functional entity 901 is DTF, and the territory selection information of all correlated activation sessions of having set up before the called subscriber with this session writes initial session and sets up request message, transmits this initial session of processing then and sets up request message;

Described second functional entity 902 is DSF or CSI-AS, sets up the territory of all correlated activation sessions of extracting the called subscriber the request message from initial session and selects information.

Still consult shown in Figure 9, wherein:

Comprise among the described DTF901:

First memory 9011, information is selected in the territory of all correlated activation sessions of having set up before the storage called subscriber;

The first request message processing unit 9012 extracts called subscriber's correlated activation session territory and selects information from described first memory, and it is write initial session sets up request message, transmits then to handle this initial session and set up request message;

Described DSF or CSI-AS comprise:

The second request message processing unit 9021 is set up extraction called subscriber correlated activation session territory selection information the request message from described initial session, transmits this session of processing then and sets up request message.

As described in Figure 10, if the session input field information of DSF selection or each medium composition input field information of CSI-AS selection are passed to DTF, then:

Described first functional entity 901 comprises: the first response message processing unit 10011, and the territory selection information that this session that will know relates to writes initial session and sets up response message, transmits this initial session of processing then and sets up response message;

Described second functional entity 902 comprises: the second response message processing unit 10021, and set up the territory that this session of extraction relates to the response message from initial session and select information, transmit this initial session of processing then and set up response message.

As shown in figure 11, described first functional entity 901 is DSF, and this DSF also comprises:

Conversation switching territory selected cell 10012 connects the described first response message processing unit, for the called subscriber selects this conversation switching territory;

As shown in figure 12, described first functional entity 1001 is CSI-AS, and this CSI-AS also comprises:

The medium composition territory selected cell 10013 that continues connects the described first response message processing unit, for each medium in this session become the different territory of continuing of component selections;

As shown in figure 13, described second functional entity 902 is DTF, and this DTF can also comprise:

Second memory 10022 is stored the territory that this session that the described second response message processing unit extracts relates to and is selected information.

In the described system of present embodiment, described DSF and CSI-AS can merge setting or branch is arranged.

As shown in figure 14, the method that the present invention also provides a kind of simple transmission territory to select information, wherein DTF comprises the steps: to the method that DSF subscribes to the conversation switching domain information

S1401, DTF subscribe to the conversation switching domain information of VCC user's session each time to DSF;

S1402, DSF set up in the process session each time, the conversation switching territory of this session of selecting to continue;

S1403, DSF send to DTF with the session domain information that continues after the setting up in the process or set up of session each time, need to send the sign of this session simultaneously.

Above-mentioned flow process can adopt sip message to realize, also can adopt self-defining message to realize.

As shown in figure 15, DTF subscribes to the continue process of domain information of each medium composition to CSI-AS and comprises:

Each medium composition that S1501, DTF subscribe to VCC user's session each time to CSI-AS domain information that continues;

S1502, CSI-AS set up in the process session each time, split Multimedia session and each medium composition of this session of selecting to continue territory of continuing;

S1503, CSI-AS send to DTF with each medium composition domain information that continues after the setting up in the process or set up of session each time, need to send the sign of this session simultaneously.

Therefore, realize system for carrying out said process, comprising:

Consult shown in Figure 16, wherein:

Comprise among the described DTF1601:

Subscriber units 16011 is selected information to the relevant territory of continuing of DSF and/or CSI-AS subscription VCC user conversation;

Information receiving unit 16012 receives the relevant territory selection information that continues that DSF and/or CSI-AS send.

Comprise among described DSF or the CSI-AS1602:

The territory selected cell 16021 that continues, if subscribed side is DSF, the territory selected cell 16021 that then continues is selected this conversation switching territory for the VCC user conversation; If subscribed side is CSI-AS, the territory selected cell 16021 that then continues is selected the domain information that continues of each medium composition in this session for the VCC user conversation;

Information transmitting unit 16022, the conversation switching domain information of send selecting to DTF or each the medium composition domain information that continues.

When DTF simultaneously when DSF subscribes to relevant selective information in called user domain with CSI-AS, DSF and CSI-AS merge and are provided with or branch is arranged.

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

Claims

1. set up in the flow process method of transmitting selective information in called user domain in session for one kind, it is characterized in that, comprise the steps:

The functional entity that writes the follow-up process of relevant initial session message of selective information in called user domain extracts selective information in called user domain from described relevant initial session message after, continue again to transmit that handle should relevant initial session message.

2. the method for claim 1 is characterized in that,

3. method as claimed in claim 2 is characterized in that,

4. method as claimed in claim 3 is characterized in that,

DSF selects this conversation switching territory with reference to described correlated activation session territory selection information for the called subscriber; And/or

CSI-AS becomes the component selections territory of continuing with reference to described correlated activation session territory selection information for the called subscriber selects each medium in this session.

5. as claim 2,3 or 4 described methods, it is characterized in that, comprise the conversation switching domain information of correlated activation session in described called subscriber's correlated activation session territory selection information.

6. method as claimed in claim 5, it is characterized in that, if comprise Multimedia session in the session of described called subscriber's correlated activation, also comprise in the Multimedia session each medium composition domain information that continues in described called subscriber's correlated activation session territory selection information.

7. the method for claim 1 is characterized in that,

8. method as claimed in claim 7 is characterized in that, the territory selection information that described this session relates to comprises this conversation switching domain information that DSF selects; And:

9. method as claimed in claim 7 is characterized in that, when described session was Multimedia session, the territory selection information that described this session relates to comprised in this session that CSI-AS selects each medium composition domain information that continues; And:

10. method as claimed in claim 9 is characterized in that, DSF and CSI-AS merge setting or branch is arranged.

11. method as claimed in claim 7, it is characterized in that the described territory of knowing that this session relates to is selected information and it is write described initial session to set up the functional entity of response message and comprise: control gateway functional entity MGCF or proxy call conversation control function entity P-CSCF.

12. as the arbitrary described method of claim 7-11, it is characterized in that, set up the territory that described this session of extraction relates to the response message from described initial session and select the functional entity of information to comprise DTF.

13. the method for claim 1 is characterized in that, in the header field that described selective information in called user domain is written in the message body of relevant initial session message, defined in the message header or in the message header in the header field of redetermination.

14. set up in the flow process system that transmits selective information in called user domain in session for one kind, it is characterized in that, comprising:

First functional entity, know selective information in called user domain after, selective information in called user domain is write step by step the relevant initial session message of transmitting, transmit then that handle should relevant initial session message;

Second functional entity, from the relevant initial session message of receiving that comprises selective information in called user domain, extract selective information in called user domain after, continue to transmit handling should relevant initial session message again.

15. system as claimed in claim 14 is characterized in that,

Described second functional entity is DSF and/or CSI-AS, after initial session is set up the territory selection information of all correlated activation sessions of extracting the called subscriber the request message, continues to transmit this initial session of processing again and sets up request message.

16. system as claimed in claim 15, it is characterized in that one of following,

Described DTF comprises:

Described DSF and/or CSI-AS comprise:

17. system as claimed in claim 14 is characterized in that,

18. system as claimed in claim 17 is characterized in that, one of following or combination in any:

Described first functional entity is DSF, and this DSF also comprises:

Described first functional entity is CSI-AS, and this CSI-AS also comprises:

Described first functional entity is MGCF or P-CSCF;

Described second functional entity is DTF, and this DTF also comprises:

Second memory is stored the territory that this session that the described second response message processing unit extracts relates to and is selected information.

19., it is characterized in that described DSF and CSI-AS merge setting or branch is arranged as claim 16 or 18 described systems.

20. a method of transmitting selective information in called user domain is characterized in that, comprises the steps:

21. method as claimed in claim 20 is characterized in that, described method also comprises:

22. method as claimed in claim 21 is characterized in that, CSI-AS and DSF merge setting or branch is arranged.

23. a system that transmits selective information in called user domain is characterized in that, comprising:

24. system as claimed in claim 23 is characterized in that one of following or combination in any:

Described DSF comprises:

Described CSI-AS comprises:

Described DTF comprises:

25. system as claimed in claim 23 is characterized in that, when DTF simultaneously when DSF subscribes to relevant selective information in called user domain with CSI-AS, DSF and CSI-AS merge and are provided with or branch is arranged.