CN101155340A

CN101155340A - Method and system for circuit field sensing IMS field conversation charging information

Info

Publication number: CN101155340A
Application number: CN 200610152689
Authority: CN
Inventors: 李岩; 朱东铭
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-09-25
Filing date: 2006-09-25
Publication date: 2008-04-02
Anticipated expiration: 2026-09-25
Also published as: WO2008040173A1; CN101155340B

Abstract

A method and system of circuit switched domain induction IMS domain speech charging information are disclosed in the present invention, in order to resolve the problem of circuit switched domain intelligent service control entity imperceptibility IMS domain speech charging information in prior art. The present invention method comprises: a service switch function entity IM-SSF obtains the speech charging information from received IMS domain speech control signaling; and the IM-SSF reports the received speech charging information to the intelligent service control entity SCP. The present invention system comprises: HSS, SCP and S-CSCF, also comprises IM-SSFs jointing with HSS, SCP and S-CSCF respectively used for obtaining the speech charging information from the received IMS domain speech control signaling; an interface between IM-SSF and SCP is used for reporting the obtained speech charging information from to SCP from IM-SSF. The present invention can lead the circuit switched domain intelligent service control entity to induce IMS domain speech charging information.

Description

A kind of method and system of circuit field sensing IMS field conversation charging information

Technical field

The present invention relates to the communications field, particularly relate to a kind of method and system of circuit field sensing IMS field conversation charging information.

Background technology

The carrying of next generation communication network has begun to use instead IP comprehensively.From the development of communication network,, all experienced from the legacy circuit-switched networks network to control and carried the IP packet network of separation again to the such evolution process of the multi-media network of all-IP no matter be CDMA or GSM/WCDMA.The example that is evolved to CDMA: the cdma network carrying to having defined two evolution stages of LMSD and MMD, select IP to select as the carrying of core net and Access Network, and the A interface is selected IP from initial TDM carrying on bearer types; CDMA LMSD stage circuit domain has realized separating of carrying and control, supports IP on bearer types; The MMD version is then introduced IMS territory, interface signaling IPization (SIP) in core net.Final goal in this evolution process is to provide professional by unified IMS network.

On the other hand, U.S. Bel communication common carrier in 1984 and American Technology Corporation (AMTECH) have proposed the notion of intelligent network, it be one can be fast, convenient, flexibly, economical, generate and realize the system of various new business to have the design feature that Business Processing and call treatment are separated effectively.Because intelligent network has above advantage, traditional circuit domain has been introduced the intelligent network framework rapidly, wherein fixed network has defined Intelligent Network Application Protocol (INAP, Intelligent Network Application Protocol), GSM/WCDMA is for realizing IN service, introduce mobile network and strengthened logical client application (CAMEL, Customised Application forMobile network Enhanced Logic), CDMA mobile communication system has defined a series of wireless intelligent networks (WIN, Wireless Intelligent Network) agreement.More than these intelligent network frameworks all be based on traditional circuit domain, after traditional circuit domain carries out the transition to the IMS network, still be necessary intelligent network is incorporated into the IMS territory, GSM/WCDMA is incorporated into the IMS territory to the CAMEL function structure, and defined relevant criterion (TS23.278), and also having relevant criterion to define at present, CDMA how the intelligent network based on WIN is not incorporated into the IMS territory.

One, the IN service realization flow of existing CDMA traditional circuit domain.

The CDMA traditional circuit domain provides a variety of IN services to the user, as PPC (pre-payment), and FPH (by being added payings), business such as ICS (going into to exhale screening) below is an example with the PPC business, and the realization mechanism of CDMA traditional circuit area intelligent service is described.

● the flow process that the signatory PPC service concurrence of traditional circuit domain user plays caller comprises the following steps: referring to shown in Figure 1

1. the user sends to MSC/SSF by BSC and begins to call for to ask, and carries called number and calling subscriber identification.

The Origination_Attempt_Authorized trigger 2.MSC/SSF the judgement calling subscriber has contracted according to the SCP address of this recording trigger, sends ORREQ message to SCP, carries calling subscriber identification.

3.SCP check that the user has activated PPC business and user and had enough account balances and then return orreq to MSC/SSF, indicating call continues.

The Calling_Routing_Address_Available trigger 4.MSC/SSF the judgement calling subscriber has contracted sends ANLYZD according to this trigger corresponding address to SCP, carries the called routing iinformation that obtains according to called number.

5.SCP according to the called routing iinformation in the ANLYZD, the rate of decision calling subscriber conversation is returned anlyzd to MSC/SSF, indicating call continues.

6.MSC/SSF, send initial call message (by interoffice control signaling) to called subscriber's home network according to routing iinformation.

7. called network returns called terminal ringing message, sends ring-back tone to the calling subscriber.

8. called network returns user answer.

The O_Answer trigger 9.MSC/SSF the judgement calling subscriber has contracted sends OANSWER message according to this trigger corresponding address to SCP, carries answering time of called subscriber, and SCP began to charge according to this time.

● the signatory PPC business of traditional circuit domain user, comprises the following steps: referring to shown in Figure 2 as called flow process

Begin to call for to ask 1.MSC/SSF receive.

2.MSC/SSF judging the called subscriber is the mobile subscriber, obtains called routing iinformation to the HLR of called ownership.

The PPC business 3.HLR the judgement user has contracted is then returned corresponding intelligent contactor tabulation and CSI called subscriber identification.

4.MSC/SSF the information of returning according to HLR is judged user's Initial_Termination trigger of having contracted, and according to the SCP address of this recording trigger, sends ANLYZD message to SCP, carries CSI called subscriber identification.

5.SCP check that the called subscriber has activated PPC business and user and had enough account balances and then return anlyzd to MSC/SSF, indicating call continues.

6.MSC/SSF obtain called routing iinformation to HLR once more, carry the trigtype parameter, get route for the first time to distinguish.

7.HLR return termlist, in the current MSC/SSF of the being in compass of competency of indication called subscriber (if the user roams into other MSC, then HLR can return the routing iinformation that can be routed to other MSC).

The Called_Routing_Address_Available trigger 8.MSC/SSF the judgement called subscriber has contracted sends ANLYZD according to this trigger corresponding address to SCP, carries the called routing iinformation that obtains according to the HLR return messages.

9.SCP according to the called routing iinformation in the ANLYZD, the rate of decision called subscriber conversation is returned anlyzd to MSC/SSF, indicating call continues.

10～11. because the called subscriber just at this MSC/SSF, MSC/SSF sends paging request message to subordinate BSC, BSC returns page response (if the called subscriber roams into other MSC, the routing iinformation that returns according to HLR of MSC/SSF then, MSC to correspondence sends initial call message, and called number is a routing number).

12～13.MSC/SSF sends assignment message to subordinate BSC, distributes and calls out resource requirement, and BSC returns assignment and finishes, and this moment, the called subscriber began ring.

14.MSC/SSF return called terminal ringing to Calling Side.

15. called subscriber's echo reply message.

The T_Answer trigger 16.MSC/SSF the judgement called subscriber has contracted sends TANSWER message according to this trigger corresponding address to SCP, carries answering time of called subscriber, and SCP began to charge according to this time.

17.MSC/SSF return called party answer to Calling Side.

From above CDMA traditional circuit area intelligent service flow process as can be seen, for intelligent network business, the major function of MSC/SSF (can come from Access Network after receiving call control signalling exactly, also can be and come from other MSC), according to the information that this call control signalling comprises, judge whether to satisfy the intelligent contactor condition that the user contracts, if satisfy, then mutual with SCP, provide calling relevant information to SCP, SCP finishes relevant IN service according to this information.That need explanation a bit is PPC (prepayment service) for traditional circuit domain, and the charging criterion is to be unit with the air time.

Two, the Multimedia session in IMS territory.

IMS territory user can carry out Multimedia session (promptly comprising voice, the session of multiple Media Stream such as video), and these media stream bearing are on IP.And carrying separates with control, this design makes IMS territory entity and do not know the service traffics of IMS session at user plane, and IP connects the signaling status that network entity (PDSN etc.) is not understood control plane yet, from operator's angle, wish that the charge information of user plane and control plane carries out related.

● IMS territory user sets up flow process referring to shown in Figure 3 as the session of caller, comprises the following steps:

Begin to call for to ask 1.UE send, comprise the medium stream information that calling will set up in the request message and (can comprise multiple Media Stream such as voice and video etc., and the bandwidth of every kind of Media Stream and encoding and decoding etc.), this message at first mails to the entrance P-CSCF in IMS territory, P-CSCF adds new header field p-charging-vector in message, comprise the IMS territory charging identifier (ICID) that generates by P-CSCF, P-CSCF mails to this message the S-CSCF of user's registration, other business if the calling subscriber has contracted, then S-CSCF can arrive AS (service platform) with this forwards according to iFC, after AS finishes dealing with message is returned to S-CSCF, after the S-CSCF judgement does not have other Business Processing, this message is mail to called subscriber's belonging network (for the purpose of omitting among the figure, do not draw S-CSCF and AS's is mutual).

Annotate 1:S-CSCF and AS and all can preserve ICID.

Annotate 2: if there are trusting relationship in called subscriber's belonging network and calling subscriber's network, then ICID also can mail to callee side.

2. callee side returns 183 message, and the media information that the called subscriber selects is carried in the inside, and UE is returned in the path that this message was called for when asking according to the beginning.

3.P-CSCF after receiving 183 message, calling for media information that summation 183 message consult according to the beginning generates corresponding QOS and requires (as to the bandwidth--delay requirement of every kind of medium type etc.), and according to calling subscriber identification with its PCRF (strategy and charging principle functional entity) that mails to its ownership, comprise the ICID parameter.

4.PCRF return response message.

5. the calling subscriber returns the affirmation message (PRACK) of 183 responses, confirms medium type and the corresponding codes form selected.

6. the called subscriber returns the response message of PRACK, the media information that carries consistent with the PRACK that receives (negotiation of media streams is finished).

7. the calling subscriber sets up the IP carrying alternately by Access Network and PDSN (packet data exchanged node), and proposes the QOS requirement.

8.PDSN the IP beared information of customer requirements foundation is mail to the PRCF of its ownership according to user's Access Network sign.

9.PRCF the P-CSCF that connects with it to the 3rd step sends a request message, and carries the charging address information (ANCA) of user access networks and the charging identifier of Access Network (ANCI, this sign can have a plurality of at the IP beared information).

10.P-CSCF the record charging address information of Access Network and the charging identifier of Access Network, and return response message if step 3 li is not carried the QOS information after session layer is consulted, then carry QOS information.

Meet the QOS requirement that its session layer is consulted 11.PRCF judge the IP carrying that customer requirements is set up, then return response message, the charging principle information such as (as off-line or online chargings) of carrying ICID and carrying at IP to PDSN.

12.PDSN the approval user sets up the IP carrying.

After 13. bearing resource is set up, UE sends updating message, indication Calling Side bearing resource reservation is finished, this message is when P-CSCF, because P-CSCF is to have obtained the Access Network charge information, P-CSCF adds this information in the p-charging-vector header field to, and S-CSCF and AS preserve this information, when S-CSCF transmits this message to called network, the Access Network information of going back.

14. the called subscriber returns the renewal response message.

15. after the called subscriber finishes resource reservation, return 180 ALERTING messages.

16. the calling subscriber returns the affirmation message (PRACK) of 180 ALERTING messages.

17. the called subscriber returns the response message of PRACK.

18. called subscriber's echo reply message.

19. the affirmation message (ACK) of calling subscriber's echo reply message, the calling and called user begins conversation.

● IMS territory user sets up flow process referring to shown in Figure 4 as called session, comprises the following steps:

1. the beginning of Calling Side is called for and asks the I-CSCF that sends to called subscriber's ownership, if calling subscriber's belonging network and callee side belong to same trust domain, then I-CSCF can adopt the ICID that Calling Side generates, otherwise generate the IMS territory charging identifier (ICID) of called subscriber's network by I-CSCF, I-CSCF by with the S-CSCF (with not drawing alternately of HSS) that obtains called subscriber registration alternately of HSS, this message is mail to S-CSCF, other business if S-CSCF judgement called subscriber has contracted, then S-CSCF can arrive AS (service platform) with this forwards according to iFC, after AS finishes dealing with message is returned to S-CSCF, after the S-CSCF judgement does not have other Business Processing, this message is mail to called subscriber's IMS realm entry point P-CSCF, after by P-CSCF the p-charging-vector header field in this message being removed, mail to UE (for the purpose of omitting among the figure, do not draw S-CSCF and AS's is mutual).Annotate: S-CSCF, P-CSCF and AS can preserve ICID;

2. follow-up flow process is similar with caller, it should be noted that after the calling subscriber sends updating message indication Calling Side resource reservation and finishes, if the callee side resource reservation is finished, then P-CSCF adds the Access Network charge information in the response message of updating message, otherwise P-CSCF adds the Access Network charge information in 180 ALERTING messages.

From above calling and called flow process as can be seen, the session of IMS territory has the process of user plane (carrying) and the mutually mutual charging identifier of control plane, by this process, IMS territory each network entity (P-CSCF, S-CSCF, AS, MRFC etc.) and each entity (PDSN of Access Network, PCRF etc.) all write down the charging identifier on two planes, thereby made operator to charge flexibly according to this incidence relation.

● the application of charge associated mechanism in the Online Charging System of IMS territory, referring to shown in Figure 5.

The S-CSCF in IMS territory, AS, MRFC (the media resource function entity in IMS territory, being used to provide resources such as playback meeting) Online Charging System in the interface by separately and IMS territory is mutual respectively for the PDSN entity of entity and Access Network, in interaction message, all carry the charging identifier of each entity record, and the interlock account function in the charge system of IMS territory just can will have been used those business according to the charging identifier that each entity reports in the session, how many resources (resource that the IMS territory provides) have been used, transmitted how many data associating informations such as (Access Network provide), and chargeed according to these information.

Three,, defined a kind of framework that the traditional circuit area intelligent service is provided to IMS territory user 23.278 li of 3GPP standards referring to shown in Figure 6.

This standard has been introduced the functional entity of IM-SSF in the IMS territory, IM-SSF is as an AS on the one hand, receive the sip message that S-CSCF sends by ISC interface, relevant signaling is called out in perception, IM-SSF is as a SSF on the other hand, and it detects the user needs to be triggered to SCP and go to carry out business control behind the bid of IMS territory.IM-SSF downloads intelligent subscription data by the Si interface, and according to this subscription data or network configuration cases, calling is triggered to corresponding SCP, carries out IN service and handles.Have the MAP interface in the GSM network between the functional entity of gsmSCP and the HSS/HLR, can obtain the positional information (roaming information) of user in circuit domain by this interface, signatory situation of IN service and calling locking, preceding commentaries on classics waits other circuit domain supplementary service information.Between 23.278 li IM-SSF of 3GPP standard and gsmSCP, CAMEL Application Part (being used for the GSM network) can be used alternately, similarly the ANSI41 agreement can be used alternately between IM-SSF and the CDMA intelligent business control entity (winSCP), referring to shown in Figure 7.

Mention IM-SSF in the prior art and had the ability that is triggered to CDMA intelligent business control entity (winSCP), but its interface protocol (the T1 interface among Fig. 7) still uses the ANSI41 agreement of traditional circuit domain, use this interface protocol can not transmit the charging identifier of IMS territory and Access Network, cause haveing nothing to do at the charging of these IN services and the access network resource of the actual use of user.Especially for PPC (pre-payment is an online charging) IN service, because winSCP can not obtain the charging identifier of IMS territory and Access Network, can only be for same business at time-based charging, can not charge according to this business actual flow, thus can not be perfect provide PPC IN service to IMS territory user.

Summary of the invention

The invention provides a kind of method and system of circuit field sensing IMS field conversation charging information, in order to solve the problem that circuit domain intelligent business control entity in the prior art can't sensing IMS field conversation charging information.

Further, the circuit domain intelligent business control entity can't be according to the conversation charging information in IMS territory in the solution prior art, and more the problem of session charging is finished in new record and/or cooperation.

The inventive method comprises the following steps:

Service Switching Function entity IM-SSF obtains conversation charging information from the IMS territory session control signaling of receiving; And IM-SSF reports intelligent business control entity SCP with the conversation charging information that obtains.

Wherein, described SCP upgrades the conversation charging information of local record according to the conversation charging information of receiving, and/or session charging is finished in cooperation.

In sum, described conversation charging information comprises: IMS territory charging identifier, and Access Network charge information.

Further, described Access Network charge information comprises: Access Network charging identifier and Access Network charging address.

Further again, set up in the process in the calling and called session, comprise the following steps: S-CSCF according to initial filter criteria iFC, call in the beginning of transmitting and ask the charging identifier that carries the IMS territory in the message to IM-SSF; The SCP address that writes down in the trigger that IM-SSF contracts according to the user carries the charging identifier in described IMS territory in the message that sends to this SCP; After finishing media negotiation, S-CSCF carries Access Network charging identifier and Access Network in the updating message that sends to IM-SSF charging address; The SCP address that writes down in the trigger that IM-SSF contracts according to the user, the charging address of in the message that sends to this SCP, carrying described Access Network charging identifier and Access Network.

Further again, if in the conversation procedure media re-negotiation takes place, after then comprising the following steps: to finish media re-negotiation, S-CSCF carries current Access Network charging identifier and Access Network in the updating message that sends to IM-SSF charging address; The SCP address that writes down in the trigger that IM-SSF contracts according to the user, the charging address of in the message that sends to this SCP, carrying current Access Network charging identifier and Access Network.

Further, if SCP initiates the inquiry session charge information, after comprising the following steps: that then IM-SSF receives query messages, the session status corresponding with it according to the session information inspection of carrying in the query messages, if this session is not released, then IM-SSF carries the charging identifier and the Access Network charge information in current I MS territory in the query response message that reports to described SCP; Otherwise, return error message.

Further again, after the session status of described SCP detected timer expiry, this SCP initiated the inquiry session charge information.

Further, carry described conversation charging information by the parameter in the interface protocol message between expansion IM-SSF and the SCP; The message of perhaps expanding in the interface protocol between IM-SSF and the SCP is carried described conversation charging information.

Further again, described interface protocol is the employed ANSI41 agreement of CDMA intelligent network.

Described SCP is the winSCP in the CDMA intelligent network.

System of the present invention, comprise: home subscribed services device HSS, intelligent business control entity SCP and S-CSCF, described system also comprises: with the Service Switching Function entity IM-SSF that HSS, SCP and S-CSCF link to each other respectively, be used for obtaining conversation charging information from the IMS territory session control signaling of receiving; Interface between IM-SSF and the SCP is used for reporting the described conversation charging information that obtains by IM-SSF to SCP.

Wherein, described SCP and IM-SSF are jointly as application server AS, in order to provide IN service to the user.

Wherein, described SCP and IM-SSF are jointly as IMS territory interactive function charging entity, in order to the user is chargeed in the session in IMS territory.

Described SCP is the winSCP in the CDMA intelligent network.

Beneficial effect of the present invention is as follows:

The inventive method is IM-SSF obtains conversation charging information from the IMS territory session control signaling of receiving after, carry the conversation charging information in IMS territory by the parameter in the T1 interface protocol message between expansion IM-SSF and the SCP (winSCP in the CDMA intelligent network), the message of perhaps expanding in the T1 interface protocol is carried the conversation charging information in IMS territory, the conversation charging information in IMS territory is reported corresponding SCP, thereby make this SCP can sensing IMS field conversation charging information.

Further, behind described SCP sensing IMS field conversation charging information, can upgrade the conversation charging information of local record, and/or cooperate the network element in the IMS territory to finish session charging.Thereby SCP is brought in the unified charging system in IMS territory, reach the purpose of the winSCP that reuses the CDMA traditional circuit domain, reduce the investment of Virtual network operator.

Description of drawings

Fig. 1 plays the flow chart of caller for the signatory PPC service concurrence of traditional circuit domain user;

Fig. 2 contracts the PPC business as called flow chart for the traditional circuit domain user;

Fig. 3 sets up flow chart for IMS territory user as the session of caller;

Fig. 4 sets up flow chart for IMS territory user as called session;

Fig. 5 is the application schematic diagram of charge associated mechanism in the Online Charging System of IMS territory;

Fig. 6 is the existing system architecture schematic diagram that the traditional circuit area intelligent service is provided to IMS territory user;

Fig. 7 for existing comprise winSCP provide the system architecture schematic diagram of traditional circuit area intelligent service to IMS territory user;

Fig. 8 is a system configuration schematic diagram of the present invention;

Fig. 9 finishes the structural representation of IMS territory Session Charging Function entity or AS function jointly for SCP in the system of the present invention and IM-SSF;

Figure 10 is the inventive method flow chart of steps;

Figure 11 is the inventive method example one flow chart;

Figure 12 is the inventive method example two flow charts;

Figure 13 is the inventive method example three flow charts;

Figure 14 is the inventive method example four flow charts.

Embodiment

In order to make the conversation charging information that circuit domain intelligent business control entity SCP can sensing IMS field, the invention provides a kind of system of circuit field sensing IMS field conversation charging information, referring to shown in Figure 8, comprise IM-SSF, and the HSS that links to each other with described IM-SSF by the Si/Sh interface, by ISC interface and the S-CSCF that described IM-SSF links to each other, pass through the SCP (in the CDMA intelligent network, being winSCP) that T1 ' interface links to each other with described IM-SSF.

Described S-CSCF (serving session control function entity) is for IMS territory user carries out session control and registration service.When the user is in the session, S-CSCF peace preservation association speech phase, and according to the needs of Virtual network operator to service support, undertaken providing corresponding service by IM-SSF alternately by ISC interface and IM-SSF.

Described HSS deposits the data relevant with service with the user, comprising intelligent subscription data.Described intelligent subscription data can download to IM-SSF by Si interface (using the ANSI41 agreement) or Sh interface (using the diameter agreement), so that IM-SSF is mutual with corresponding SCP according to these data.

Described SCP (the intelligent business control entity winSCP in the cdma network), the session information that this entity reports according to IM-SSF provides corresponding IN service.

Described IM-SSF on the one hand as service platform (AS), receives the session control signaling of sending from S-CSCF, and obtain conversation charging information from the session control signaling of receiving; On the other hand as the Service Switching Function entity, according to user's intelligence subscription data (downloading from HSS) by the Si/Sh interface, T1 interface (T1 ') by expansion, the i.e. employed ANSI41 agreement of Kuo Zhan CDMA intelligent network, provide business information (this information is extracted) to the SCP of correspondence from session control signaling, provide corresponding IN service by this SCP.And IM-SSF also needs to pass through the conversation charging information that T1 ' interface reports the IMS territory, the conversation charging information that SCP can sensing IMS field (being comprised: IMS territory charging identifier, and the Access Network charge information, wherein the Access Network charge information comprises Access Network charging identifier and Access Network charging address again).

Further, in order to make the circuit domain intelligent business control entity can be according to the conversation charging information in IMS territory, more session charging is finished in new record and/or cooperation, thereby realize charge associated between each entity, described IM-SSF, SCP, HSS and S-CSCF also can be related with charge system, with IMS territory Online Charging System is example, and referring to shown in Figure 9, two network elements of described SCP and IM-SSF can be finished the function of IMS territory Session Charging Function entity or AS jointly.

For non-PPC IN service, two network elements of IM-SSF and SCP can be finished the function of AS jointly.Provide IN service (wherein IM-SSF realizes the conversion of sip message to the ANSI41 protocol message) to the user, and mutual by RO interface and Event Charging Function, and the Event Charging Function of IMS territory Online Charging System charges to this IN service.For the PPC IN service, IM-SSF and SCP can serve as the Session Charging Function entity of IMS territory charge system jointly, and the user is chargeed in the session in IMS territory.

Use said system, the present invention also provides a kind of method of circuit field sensing IMS field conversation charging information, referring to shown in Figure 10, comprises following key step:

S1, IM-SSF receive IMS territory session control signaling.

Session set up in the process or the session persistence process in, IM-SSF can receive the IMS territory session control signaling that S-CSCF sends.

S2, IM-SSF obtain conversation charging information from the IMS territory session control signaling of receiving.

Described conversation charging information comprises: IMS territory charging identifier, and Access Network charge information.Further, described Access Network charge information comprises again: Access Network charging identifier and Access Network charging address.

S3, IM-SSF report intelligent business control entity SCP with the conversation charging information that obtains.

IM-SSF carries described conversation charging information by the parameter in T1 ' the interface protocol message between IM-SSF after expanding and the SCP (being winSCP in the CDMA intelligent network); Perhaps IM-SSF carries described conversation charging information by the message (i.e. Xin Zeng message) in the T1 ' interface protocol between IM-SSF after expanding and the SCP (being winSCP in the CDMA intelligent network), reports corresponding SCP.The described agreement that is expanded is the employed ANSI41 agreement of CDMA intelligent network.

Afterwards, described SCP upgrades the conversation charging information of local record according to the conversation charging information of receiving, and/or cooperates and finish session charging, thereby realizes charge associated between each entity.

Below specifically describe the inventive method by four examples.

Method example one, IMS territory user initiate caller, provide PPC (pre-payment) business by SCP to it.Referring to shown in Figure 11, comprise following concrete steps:

1, UE1 sends to begin to call for to the S-CSCF of calling subscriber's registration by P-CSCF and asks (for the purpose of omitting among Figure 11, P-CSCF does not draw), comprises calling in the request message and will set up medium stream information.

2, the iFC that contracts according to the user of S-CSCF calls for the beginning to ask and is forwarded to IM-SSF, comprises the charging identifier (ICID is generated by P-CSCF) in IMS territory in the message.

3, IM-SSF judges calling subscriber's Origination_Attempt_Authorized trigger of having contracted, SCP address according to this recording trigger, send ORREQ (Original Request) message to SCP, except that carrying the required session information of former IN service, (comprise BILLINID, be used for related same call branch, calling for the CALLID header field of asking in the message by the beginning generates), also need carry the charging identifier (ICID) in IMS territory.

4, SCP checks that the calling subscriber has activated the PPC business and the user has enough current multimedia calls of account balance support, then returns orreq to IM-SSF, and indicating call continues.

5, IM-SSF judges calling subscriber's Calling_Routing_Address_Available trigger of having contracted, SCP address according to this recording trigger, send ANLYZD to SCP, carry the called routing iinformation and the BILLINGID that obtain according to CSI called subscriber identification.

6, SCP finds corresponding calling branch according to BILLINGID, according to the initial rate of called routing iinformation decision calling subscriber conversation, returns anlyzd to IM-SSF, and indicating call continues.

7, IM-SSF handle IN service mutual after, return the beginning to S-CSCF and call for and ask message, and self is inserted in the call path.

8, S-CSCF is routed to callee side with call request.

9～11, callee side returns 183 message, the media information of the current reception of indication called subscriber.

12～14, the calling subscriber returns the affirmation message (PRACK) of 183 responses, carries the final media information of selecting of calling subscriber.

15～17, the called subscriber returns the response message of PRACK, the media information that carries consistent with the PRACK that receives (negotiation of media streams is finished).

18, after the calling subscriber finishes resource reservation, send updating message to S-CSCF by P-CSCF.

19, S-CSCF mails to IM-SSF with updating message, carries the Access Network charge information, comprises the information such as charging address (being added by P-CSCF) of Access Network charging identifier and Access Network, and IM-SSF writes down this information.

20, IM-SSF returns to S-CSCF with updating message.

21, S-CSCF removes Access Network charging relevant information, and this message is mail to callee side.

22～24, the called subscriber returns the renewal response message.

25, called subscriber's ring (concrete steps are referring to background technology).

26, the called subscriber returns session response message.

27, because IM-SSF has been inserted in the call path, S-CSCF is transmitted to IM-SSF with the session response message.

28, IM-SSF judges calling subscriber's O_Answer trigger of having contracted, SCP address according to this recording trigger, send OANSWER message to SCP, except that carrying the required session information of former IN service (comprising BILLINGID), also need carry Access Network charging relevant information, comprise the information such as charging address of Access Network charging identifier and Access Network; After SCP receives this message, find corresponding calling branch according to BILLINGID, begin the calling subscriber is chargeed, and can be according to the information such as charging identifier that obtain, charge with the IMS territory resource of MRFC and the user associates unified charging in the charge on traffic of Access Network etc.

29, IM-SSF is by S-CSCF, and P-CSCF gives the calling subscriber with the called subscriber answer forwards,

30～32, the calling subscriber returns acknowledge message.

In this example, though be exemplified as the PPC business, this mechanism is equally applicable to other IN services.

Method example two, IMS territory user provide PPC (pre-payment) business by SCP to it as called.Referring to shown in Figure 12, comprise following concrete steps:

1, Calling Side is called for the beginning and is asked message to be routed to the I-CSCF of called subscriber's home network, I-CSCF sends to begin to call for to the S-CSCF of called subscriber's registration and asks (for the purpose of omitting among Figure 12, I-CSCF does not draw), comprise the medium stream information that calling will be set up in the request message, the ICID that comprises the caller network if Calling Side network and called network belong to same trusted territory in the message, otherwise generate the ICID of called subscriber's home network by I-CSCF.

2, the iFC that contracts according to the called subscriber of S-CSCF calls for the beginning to ask and is forwarded to IM-SSF, comprises ICID in the message.

3, IM-SSF judges called subscriber's Initial_Termination trigger of having contracted, SCP address according to this recording trigger, send ANLYZD (Analyzed Information) message to SCP, (comprise BILLINID except that carrying the required session information of former IN service, be used for related same call branch, calling for the CALLID header field of asking in the message by the beginning generates) outside, the charging identifier (ICID) in IMS territory also need be carried.

4, SCP checks that the called subscriber has activated the PPC business and the user has enough current multimedia calls of account balance support, then returns anlyzd to IM-SSF, and indicating call continues.

5, IM-SSF judges called subscriber's Called_Routing_Address_Available trigger of having contracted, and according to the SCP address of this recording trigger, sends ANLYZD message to SCP, carries current roaming information of called subscriber and BILLINGID.

6, SCP finds corresponding calling branch according to BILLINGID, and according to called roaming information, the initial rate of decision called subscriber conversation is returned anlyzd to IM-SSF, and indicating call continues.

8, S-CSCF is according to the address of called subscriber registration, sends the beginning by P-CSCF to the called subscriber and calls for and ask message.

9～11, the called subscriber returns 183 message, the media information of the current reception of indication called subscriber.

18～20, after the calling subscriber finishes resource reservation, send updating message.

21, the called subscriber is by upgrading response message.

22, because IM-SSF has been inserted in the call path, S-CSCF will upgrade response message and be transmitted to IM-SSF, if the called subscriber has finished resource reservation this moment, then carry the Access Network charge information in this renewal response message, the information such as charging address (the IMS realm entry point P-CSCF by the called subscriber generates) that comprise Access Network charging identifier and Access Network, if the called subscriber does not finish resource reservation, then when returning 180 ALERTING messages, the called subscriber carries this information.

23, after IM-SSF preserves the Access Network charge information, return the renewal response message to S-CSCF.

24, S-CSCF removes the Access Network charge information this message is returned Calling Side.

26, the called subscriber returns session response message.

28, IM-SSF judges called subscriber's T_Answer trigger of having contracted, SCP address according to this recording trigger, send TANSWER message to SCP, except that carrying the required session information of former IN service, also need carry Access Network charging relevant information, comprise the information such as charging address of Access Network charging identifier and Access Network; After SCP receives this message, find corresponding calling branch according to BILLINGID, begin the called subscriber is chargeed, and can be according to the information such as charging identifier that obtain, charge with the IMS territory resource of MRFC and the user associates unified charging in the charge on traffic of Access Network etc.

29, IM-SSF sends called party answer message by S-CSCF to Calling Side.

30～32, Calling Side echo reply acknowledge message.

After method example three, session were set up, the calling subscriber had initiated the session change flow, consults media information again, causes the Access Network charge information to change.Referring to shown in Figure 13, comprise following concrete steps:

1, the calling and called both sides have set up voice call.

2, calling subscriber's initiation session change is wished change medium composition, because IM-SSF is inserted in the call path, so IM-SSF can receive this session change request message.

3, IM-SSF is transmitted to S-CSCF with the session change request message.

4, S-CSCF sends to the opposite end with the session change request message.

5～13, calling and called media consultation process.

14, after the calling subscriber finishes resource reservation, send updating message to S-CSCF by P-CSCF;

15, S-CSCF mails to IM-SSF with updating message, carries Access Network charging relevant information, comprises the information such as charging address (being added by P-CSCF) of new Access Network charging identifier and Access Network, and IM-SSF writes down this information.

16, IM-SSF returns to S-CSCF with updating message.

17, S-CSCF removes Access Network charging relevant information, and this message is mail to callee side.

18～20, callee side returns the renewal response message.

21～23, after the callee side resource reservation is finished, return 180 message, indication callee side resource reservation is finished.

24～26, Calling Side returns 180 acknowledge messages.

27～29, callee side returns the affirmation response message.

30, callee side returns session updates and finishes message.

31, IM-SSF detects the O_Service_Change_Complish trigger, send OSCC message according to this trigger corresponding address to SCP, carry current session identification (BILLINGID), user ID (MSID) and Access Network charging relevant information, comprise Access Network charging address and new Access Network charging identifier.Annotate: OSCC is the ANSI41 message that increases newly.

32, SCP receives the Access Network charge information of its record of change after this message, returns response message.

33, IM-SSF returns to upgrade to the calling subscriber and finishes.

Annotate: callee side flow process and Calling Side are similar, and distinguishing what be to trigger is the T_Service_Change_Complish trigger, reports TSCC message.

The session status query script that method example four, SCP are initiated (safeguarding in the SCP of traditional circuit domain has session status to detect timer, to detect session status, avoids because cause the two ends call state inconsistent after the link occurs fault between SCP and the SSF).

In communication process, after the SCP session status detects timer expiry, initiatively inquire about the state of current sessions to IM-SSF.Referring to shown in Figure 14, comprise following concrete steps:

1, the calling and called both sides have set up the multimedia conversation.

2, after the session status of SCP detects timer expiry, need the inspection user state, send CCDIR message, comprise current session identification (BILLINGID), user ID (MSID), SCP and identify information such as (MSCID) to IM-SSF.

Annotate: the purpose of SCP check session status is to solve SCP and the inconsistent problem of IM-SSF both sides session status, after IM-SSF transmission (O/T) ANSWER message, enter session and set up state, but SCP also is not in the user answer state of waiting for because fault is received this message.

3, after IM-SSF received this message, IM-SSF checked corresponding session status according to BILLINGID and MSID, does not discharge if call out, then returns ccdir, carries IMS territory charging identifier and Access Network charge information in the message, otherwise, return error message.

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. the method for a circuit field sensing IMS field conversation charging information is characterized in that, comprises the following steps:

Service Switching Function entity IM-SSF obtains conversation charging information from the IMS territory session control signaling of receiving; And

IM-SSF reports intelligent business control entity SCP with the conversation charging information that obtains.

2. the method for claim 1 is characterized in that, described SCP upgrades the conversation charging information of local record according to the conversation charging information of receiving, and/or session charging is finished in cooperation.

3. method as claimed in claim 1 or 2 is characterized in that, described conversation charging information comprises: IMS territory charging identifier, and Access Network charge information.

4. method as claimed in claim 3 is characterized in that, described Access Network charge information comprises: Access Network charging identifier and Access Network charging address.

5. method as claimed in claim 4 is characterized in that, sets up in the process in the calling and called session, comprises the following steps:

S-CSCF is according to initial filter criteria iFC, calls in the beginning of transmitting to IM-SSF and asks the charging identifier that carries the IMS territory in the message;

The SCP address that writes down in the trigger that IM-SSF contracts according to the user carries the charging identifier in described IMS territory in the message that sends to this SCP;

After finishing media negotiation, S-CSCF carries Access Network charging identifier and Access Network in the updating message that sends to IM-SSF charging address;

The SCP address that writes down in the trigger that IM-SSF contracts according to the user, the charging address of in the message that sends to this SCP, carrying described Access Network charging identifier and Access Network.

6. method as claimed in claim 5 is characterized in that, if in the conversation procedure media re-negotiation takes place, then comprises the following steps:

After finishing media re-negotiation, S-CSCF carries current Access Network charging identifier and Access Network in the updating message that sends to IM-SSF charging address;

The SCP address that writes down in the trigger that IM-SSF contracts according to the user, the charging address of in the message that sends to this SCP, carrying current Access Network charging identifier and Access Network.

7. method as claimed in claim 3 is characterized in that, if SCP initiates the inquiry session charge information, then comprises the following steps:

After IM-SSF receives query messages, the session status corresponding with it according to the session information inspection of carrying in the query messages, if this session is not released, then IM-SSF carries the charging identifier and the Access Network charge information in current I MS territory in the query response message that reports to described SCP; Otherwise, return error message.

8. method as claimed in claim 7 is characterized in that, after the session status of described SCP detected timer expiry, this SCP initiated the inquiry session charge information.

9. method as claimed in claim 3 is characterized in that, carries described conversation charging information by the parameter in the interface protocol message between expansion IM-SSF and the SCP; The message of perhaps expanding in the interface protocol between IM-SSF and the SCP is carried described conversation charging information.

10. method as claimed in claim 9 is characterized in that, described interface protocol is the employed ANSI41 agreement of CDMA intelligent network.

11. the method for claim 1 is characterized in that, described SCP is the winSCP in the CDMA intelligent network.

12. the system of a circuit field sensing IMS field conversation charging information comprises: home subscribed services device HSS, intelligent business control entity SCP and S-CSCF is characterized in that described system also comprises:

With the Service Switching Function entity IM-SSF that HSS, SCP and S-CSCF link to each other respectively, be used for obtaining conversation charging information from the IMS territory session control signaling of receiving;

Interface between IM-SSF and the SCP is used for reporting the described conversation charging information that obtains by IM-SSF to SCP.

13. system as claimed in claim 12 is characterized in that, described SCP and IM-SSF are jointly as application server AS, in order to provide IN service to the user.

14. system as claimed in claim 12 is characterized in that, described SCP and IM-SSF are jointly as IMS territory interactive function charging entity, in order to the user is chargeed in the session in IMS territory.

15. as each described system of claim 12 to 14, it is characterized in that described conversation charging information comprises: IMS territory charging identifier, and Access Network charge information.

16. system as claimed in claim 15 is characterized in that, described Access Network charge information comprises: Access Network charging identifier and Access Network charging address.

17. system as claimed in claim 12 is characterized in that, described SCP is the winSCP in the CDMA intelligent network.