WO2007038902A1 - Procede de chargement en ligne, dispositif et systeme associes - Google Patents

Procede de chargement en ligne, dispositif et systeme associes Download PDF

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Publication number
WO2007038902A1
WO2007038902A1 PCT/CN2006/002595 CN2006002595W WO2007038902A1 WO 2007038902 A1 WO2007038902 A1 WO 2007038902A1 CN 2006002595 W CN2006002595 W CN 2006002595W WO 2007038902 A1 WO2007038902 A1 WO 2007038902A1
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WIPO (PCT)
Prior art keywords
domain
user
ims
call
service
Prior art date
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PCT/CN2006/002595
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English (en)
French (fr)
Inventor
Dongming Zhu
Xiaoqin Duan
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Huawei Technologies Co., Ltd.
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to DE602006021758T priority Critical patent/DE602006021758D1/de
Priority to PL06791181T priority patent/PL1924024T3/pl
Priority to AT06791181T priority patent/ATE508553T1/de
Priority to EP06791181A priority patent/EP1924024B1/en
Priority to CN2006800119245A priority patent/CN101156359B/zh
Publication of WO2007038902A1 publication Critical patent/WO2007038902A1/zh
Priority to US12/042,952 priority patent/US8036210B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/08—Payment architectures
    • G06Q20/10—Payment architectures specially adapted for electronic funds transfer [EFT] systems; specially adapted for home banking systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1442—Charging, metering or billing arrangements for data wireline or wireless communications at network operator level
    • H04L12/1446—Charging, metering or billing arrangements for data wireline or wireless communications at network operator level inter-operator billing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1453—Methods or systems for payment or settlement of the charges for data transmission involving significant interaction with the data transmission network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/57—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP for integrated multimedia messaging subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/83—Notification aspects
    • H04M15/85—Notification aspects characterised by the type of condition triggering a notification
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/83—Notification aspects
    • H04M15/85—Notification aspects characterised by the type of condition triggering a notification
    • H04M15/851—Determined tariff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/83—Notification aspects
    • H04M15/85—Notification aspects characterised by the type of condition triggering a notification
    • H04M15/853—Calculate maximum communication time or volume
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/83—Notification aspects
    • H04M15/85—Notification aspects characterised by the type of condition triggering a notification
    • H04M15/854—Available credit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/20—Technology dependant metering
    • H04M2215/204—UMTS; GPRS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/20—Technology dependant metering
    • H04M2215/208—IMS, i.e. Integrated Multimedia messaging Subsystem
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/81—Notifying aspects, e.g. notifications or displays to the user
    • H04M2215/815—Notification when a specific condition, service or event is met
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/81—Notifying aspects, e.g. notifications or displays to the user
    • H04M2215/815—Notification when a specific condition, service or event is met
    • H04M2215/8162—Calculate maximum communication time or volume
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/81—Notifying aspects, e.g. notifications or displays to the user
    • H04M2215/815—Notification when a specific condition, service or event is met
    • H04M2215/8166—Available credit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24—Accounting or billing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, apparatus, and system for providing online charging. Background technique
  • the universal mobile communication system UMTS core network is divided into circuit switched domains (CS: Circuit
  • PS Packet Switched Domain
  • IMS IP Multimedia Subsystem
  • CS domain is used to provide users with connection of circuit-type services
  • the IMS is a subsystem added to the existing packet domain added in the 3GPP R5 phase, and the packet domain is used as a bearer channel for the upper layer control signaling and the media transmission, and the session initial is introduced.
  • the protocol SIP protocol provides a rich multimedia service by separating the service control from the bearer control by using the characteristics of simple SIP, easy extension, and convenient media combination.
  • the main functional entities in the IMS include a call control entity call session control function CSCF that controls functions such as user registration and session control, an application server AS that provides various service logic control functions, a home subscriber server HSS that centrally manages user subscription data, and Realizing the media gateway control function interworking with the circuit switching network MGCF I IMS media gateway M-MGW, the user accesses the IMS through the current location proxy node proxy call session control function P-CSCF, session and service trigger control and interaction with the service control of the AS Then, the home domain service node serving call session control function S-CSCF of its place of registration is completed.
  • CSCF call control entity call session control function
  • S-CSCF home domain service node serving call session control function
  • the IMS architecture defined by the 3rd Generation Mobile Communications Standardization Partnership Project (3GPP) standard comprehensively addresses key operational issues such as roaming charging, quality of service (QoS), and security assurance that are required to provide multimedia services under IP bearers. Its architecture and ideas have been recognized in the industry. 3GPP2 and TISPAN have defined the corresponding IP multimedia network architecture and service system based on the 3GPP model. 3GPP has also begun to interoperate with UMTS for WLAN access (I- WLAN), fixed broadband access IMS (FBI), and all-IP network (AIPN) for multiple access technologies, users will be able to pass different licenses through a single multimode terminal or multiple types of different terminals. The access network accessing the hacker accesses the IMS to obtain unified multimedia services, including VoIP (voice-over-the-voice services) services. In the research of these topics, it is possible to involve both CS domain and IMS domain. business.
  • VoIP voice-over-the-voice services
  • the 3GPP version adopted a work topic to study the business continuity problem between the CS call and the IP-enabled voice service (VoIP service) provided by the WLAN through the WLAN, including research supporting CS calls and passing WLAN (or Other IP access networks) access the VoIP service switching provided by the IMS, thereby implementing a method of voice call continuity to adapt to the needs of network and service development.
  • VoIP service IP-enabled voice service
  • the voice call continuity service is a typical representative of services involving both the CS domain and the MS domain.
  • CCCF call continuity control function
  • the control signaling related to the user's circuit city call and the IMS domain session is sent to the application server for anchoring, and the CCCF controls the call between the switching user and the peer user in a third-party controlled manner.
  • Connect, and control cross-domain switching according to user request That is, the call connection between the switching user and the peer user is divided into two segments on the application server.
  • the switching user switches.
  • the network domain re-establishes its connection to the application server.
  • the application server controls the renegotiation on the connection of the user to the peer user, so that the peer user and the switching user perform voice interaction on the new connection.
  • the CCCF control completes the replacement (migration) of the two sessions between the VCC users during the handover process.
  • FIG. 2A, FIG. 2B and FIG. 2C are diagrams showing the process of establishing signaling and bearer in a VCC handover from a CS domain to an IMS domain and a subsequent VCC handover from an IMS domain to a CS domain in a prior art;
  • this process it can be understood that in the process of processing a service involving both the CS domain and the IMS domain, the online charging (or real-time charging) mode and the prepaid service that applies the charging mode as a typical application instance are faced. The problem.
  • FIG. 2A shows the establishment process of signaling and bearer in the CS domain originating call before performing the circuit domain to IMS VCC handover procedure.
  • the initial call of the circuit domain of the VCC user is controlled to be routed to the CCCF of its home IMS domain for anchoring, and the CS and IP two-leg bearer connection of the VCC user of the IM-MGW segment to the peer user is established.
  • the processing procedure is as follows:
  • the user initiates a call at the visited mobile switching center currently registered in the CS domain.
  • the visited mobile switching center triggers the calling side intelligent service according to the user subscription data, and sends an initial detection point (IDP) message to the GSM service control function gsmSCF responsible for performing the calling side routing control.
  • IDP initial detection point
  • the gsmSCF responsible for the routing control of the calling side returns a virtual roaming number (IMRN) pointing to the IMS domain to which the user belongs through the connection message, and visits the mobile switching center according to the other network elements in the circuit domain, the CS/IMS interworking gateway MGCF, and The IMS-related network element (actually, there are different processings in the IMS according to the IMRN, but this is not the part of the present invention.
  • the IMRN is a public service identifier pointing to the CCCF, and the IMS is related.
  • the network element routes the CS-IMS intercom call to the CCCF assigned to the user for the Incoming Call Session Control Function I-CSCF.
  • the CCCF accepts the received session as the last called party, and interacts with the HSS to obtain a service call session control function (not shown) currently allocated for the user, and then passes the information carried in the session establishment request.
  • the service call session control function re-initiates a call to the original peer user in the name of the user, and controls the two segments by a third party control (3PCC) (a third party call control, also called a back-to-back user agent: Routing B2BUA).
  • 3PCC third party control
  • Routing B2BUA Routing B2BUA
  • Other methods include: the user directly inserts a prefix in the initiated call or calls a number that specifically points to the user's home IMS domain, and visits the mobile
  • the switching center controls the routing according to the prefix or the special number; at the same time, the number or the IMR as described above may directly point to the CCCF as shown in FIG. 2, or may point to another application server, and the application server obtains the current through interaction with the HSS.
  • the service call session control function assigned to the user, and re-initiating a call to the original peer user in the name of the user according to the information carried in the session establishment request, and according to the service call session control function currently allocated for the user according to the user The initial filtering criteria in the IMS domain subscription data are triggered to the CCCF, etc., since these processes are not the focus of the present invention, they are not described again.
  • FIG. 2A shows a process in which the initial CS origination call is anchored to the user's home CCCF in the prior art.
  • the prior art also provides a process of anchoring the initial CS termination call to the user's home CCCF.
  • One of the methods is: the called user's home gateway, the mobile switching center, the GMSC, after receiving the call setup request from the user, obtains the CAMEL subscription data of the called side of the user through the interaction with the HLR, and triggers the called side intelligent service accordingly.
  • gsmSCF responsible for performing the called side routing control to obtain an IMRN directed to its home IMS domain, the gateway mobile switching center, the CS/IMS interworking gateway MGCF, and the IMS related network element interworking the CS-IMS according to the above information.
  • the call is routed to the CCCF allocated for the user to be anchored, and then processed in the prior art by cross-domain routing, call interworking, and CS call connection, and connected to the VCC user terminal in the CS domain to establish a VCC user via the circuit domain, CS-
  • the CS-IMS intercommunication call from the IMS interworking gateway to its IMS home domain CCCF and the CCCF interworking via the IMS related network element and CS/IMS
  • the MGCF and the circuit domain to the peer user's session are closed, and the CCCF association controls the two sessions to establish the CS and IP bearer connections of the VCC users on both sides of the IM-MGW segment to the peer user; likewise, since these processes are not
  • the focus of the present invention is therefore not described in the following.
  • the user-initiated CS->IMS switching process is as follows:
  • the IMS registration is first completed (not shown in the figure); then a session establishment request carrying the initial session information is sent to the CCCF, and the CCCF carried therein is publicly owned.
  • the service identifier serves as a handover indication, and requests the CCCF to perform an operation of switching the currently established CS domain call to the IMS domain.
  • the service call session control function currently assigned to the user by the network routes the session establishment request to the CCCF according to the initial filtering criteria in the user subscription data.
  • the CCCF performs the SIP session relocation process of replacing the CS call leg of the user with the IMS call leg, and completes the media stream interaction direction through UPDATE or re-INVITE on the session segment with the peer end, thereby establishing a pair
  • the end user connects to the end-to-end IP bearer of the VCC client.
  • the signaling and bearer establishment process in the subsequent process of switching back to the CS domain is as follows: 1.
  • the terminal When deciding that vcc needs to be switched back to the cs domain, if it has not been registered with the visited mobile switching center, the terminal first registers with the visited mobile switching center (circuit domain location update, not shown in the figure), and then initiates with the CCCF public service identity.
  • a circuit domain call to the CCCF uses the CCCF public service identifier carried therein as a handover indication to request the CCCF to perform a process of switching back to the CS.
  • the circuit domain call is routed to the CCCF via the MGCF and the Incoming or Serving Call Session Control function.
  • the CCCF performs a SIP session relocation process similar to that described above to replace the user's IMS call leg with the CS call leg.
  • the VCC handover of the subsequent IMS domain to the CS domain is taken as an example.
  • the VCC handover process of the first IMS domain to the CS domain is the same as the subsequent handover CS process described above, and is controlled by the CCCF. There is no need to perceive the previous switching history.
  • the process of establishing a new call leg between the VCC terminal and the CCCF in the CS domain during the handover process may also have various options, including: A call directed to its home IMS domain and indicating the special number IMR for the handover request, or the terminal initiates a call to a special number indicating the handover request, triggering the calling side based on the subscriber subscription data through its currently visited mobile switching center
  • the intelligent service obtains the IMRN directed to its home IMS domain by interacting with the GSM service control function gsmSCF, which is responsible for the control of the calling side, and accesses the mobile switching center, other network elements in the circuit domain, the CS/IMS interworking gateway MGCF, and the IMS related network element.
  • the charging based on the call connection will have a greater impact: for the initial circuit domain call of the VCC user as the calling or called, due to the need Routing to the home IMS domain, so the call connection is established in the circuit domain and the IMS domain at the same time before the handover, which may result in repeated charging for this period of time; and for the call between the peer and the peer user, during the handover process, It is up to the user to initiate a call connection with the CCCF in the IMS and CS + IMS, it is difficult to form a complete billing record, and according to the current charging criteria, a single long time call and multiple short calls, even the total duration Similarly, billing generally differs, so even if the recurring billing during the above handover is not considered, it is difficult to guarantee the integrity and accuracy of billing by separately charging in CS/IMS; meanwhile, due to different networks.
  • the domain establishes a call connection, and the user generally has a cost difference as both the calling party and the called party. Therefore, for such a dynamic, Flexible use of two network domains to establish and maintain call connection scenarios may require more flexible charging criteria; moreover, in this voice service continuity scheme, regardless of whether the VCC user was previously used as the calling or called party
  • the caller is newly used to establish the call leg between the CCCF and the CCCF, so it is necessary to confirm and perform the charging processing according to the correct call direction;
  • the billing of the entire process becomes extremely complicated; in particular, if still used separately In the CS/IMS charging mode, complete and accurate charging is required.
  • One of the most basic requirements is: to ensure the charging association of the CS/IMS part. On this basis, it is also guaranteed in the charging process. Correlate the two parts of information for corresponding processing.
  • the prepaid service including the widely used mode of the mode has the following basic features: There is no long-term credit relationship between the user and the network, and the user pays a certain fee.
  • the network conducts online credit control while providing services, that is, deducts the required fees in real time, and terminates the provision of services to the users when all the prepaid fees are used up.
  • the CAMEL architecture is generally provided based on the mobile network enhanced logic customization application CAMEL architecture, and the main process is: when the user initiates or accepts the circuit domain call, at the current mobile switching center (the corresponding user initiates the call) Or the gateway mobile switching center (corresponding to the user accepting the call) as the GSM service switching function gsmSSF, triggering the intelligent service according to the user's CAMEL subscription data, and establishing a control connection with the GSM service control function gsmSCF implementing the prepaid service logic control, gsmSSF 4.
  • Related call information and monitor and report the corresponding basic call state model event and billing report during the call connection and call process according to the gsmSCF indication and the approved call duration.
  • the gsmSCF deducts the fee according to the reported information and decides according to the remaining tariff. Whether to allow the user to continue the call, thereby performing CS domain credit control; corresponding to the specific implementation process introduced in the background art, that is, before the mobile switching center or the gateway mobile switching center visits the call to the user's home IMS domain CCCF, according to the user signing
  • the data is triggered to trigger a prepaid service based on CAMEL, and the corresponding gsmSCF implements real-time tariff deduction in the call and whether to allow or instruct the call control of the terminated call to perform CS domain credit control according to the tariff situation.
  • the online charging system OCS for the different aspects of bearer, session and event shown in Figure 3 is used.
  • the prepaid fee in IMS will also be used here.
  • the bearer charging function BCF including the bearer charging function BCF, the event charging function ECF, the session charging function SCF, the rate calculation function RF, and the accounting management function ABMF, etc., based on the above functions, the following three can be provided.
  • Mode of billing including:
  • Immediate Event Charging After receiving the corresponding request, the OCS approves the cost of a single operation to the IMS network element and performs the deduction of the user account;
  • the tariff reserve event billing includes the request for the event, the reservation, the release, and the recovery of the unused tariff, and finally the tariff deduction;
  • Session Charging with Unit Reservation (SCUR):
  • the tariff reserved session charging is used for credit control in the session, including the request for the session, the reservation, the release, the recovery of the unused tariff, and the processing of the tariff deduction. , the above process can be repeated multiple times in the session;
  • the IMS network element may select to use the different modes according to the service or the carrier policy; in the voice call continuity service, since the charging is for the voice call, the tariff reservation session charging mode is adopted, and the processing is performed with the corresponding user. During the session, the corresponding information is reported to the online charging system through the start-change-terminating credit control request.
  • the specific implementation can be completed by the interaction between the AS or the S-CSCF in the IMS network and the online charging system.
  • the handover scheme applying static anchor to IMS centralized control provides voice call continuity service
  • it is required to route to the home IMS when the VCC user calls as the initial circuit domain of the calling or called party.
  • the domain obtains the anchor of the CCCF, so the call connection is established in the circuit domain and the IMS domain before the handover, and for the call between the peer and the peer user, the user alternates between the IMS and the CS + IMS during the handover process.
  • the present invention provides a method, an apparatus, and a system for providing online charging, which solves the problem of correctly processing related fees in the process of performing services involving both the CS domain and the IMS domain by using the existing online charging technology solution; Solving the need to perform real-time CS/IMS charging associations for proper processing of related expenses, resulting in failure to support roaming or implementation of a large amount of engineering problems that cannot be practically implemented.
  • a method of providing online charging comprising the following steps:
  • the online charging of the user is not triggered in the CS domain by canceling the CAMEL subscription data of the online charging in the CS domain.
  • the online counting of the user is not triggered in the CS domain. fee.
  • the modifying the service data in the intelligent service platform refers to modifying related data or settings determined by the service logic in the GSM service control function entity and/or the service data point.
  • the GSM service control function entity further determines, according to the call related information, that the online charging service logic signed by the user in the CS domain is not triggered when the service involving the CS domain and the IMS domain needs to be performed.
  • the credit control process is performed by an application server that controls the services of the CS domain and the IMS domain to interact with the IMS domain online charging system and/or the CS domain prepaid system.
  • the application server that controls the service of the CS domain and the IMS domain simultaneously interacts with the online charging system of the IMS domain through the standard Ro interface according to the user subscription data. And interacting with the CS domain prepaid system through the IMS domain online charging system to complete credit control of the user in the CS domain and the IMS domain; or controlling the application server of the CS domain and the IMS domain to be contracted according to the user
  • the data interacts with the IMS domain online charging system through the standard Ro interface, and interacts with the CS domain prepaid system through the CAP interface to complete the user's credit control in the CS domain and the IMS domain.
  • the service call session control function (S-CSCF) entity assigned to the user interacts with the IMS domain online charging system and/or the CS domain prepaid system for credit control processing.
  • S-CSCF service call session control function
  • the service call session control function entity assigned to the user interacts with the online charging system of the IMS domain, and performs the MS domain online charging system and the CS domain prepaid system. Interacting, completing the credit control of the user in the CS domain and the IMS domain; or, the task call session control function entity assigned to the user interacts with the IMS domain online charging system and the CS domain prepaid system respectively according to the user subscription data.
  • User credit control in the IMS domain and CS domain When the user subscribes to the online charging service in the CS domain and the IMS domain at the same time, the service call session control function entity assigned to the user interacts with the online charging system of the IMS domain, and performs the MS domain online charging system and the CS domain prepaid system. Interacting, completing the credit control of the user in the CS domain and the IMS domain; or, the task call session control function entity assigned to the user interacts with the IMS domain online charging system and the CS domain prepaid system respectively according to the user subscription data.
  • the S-CSCF entity triggers interaction with the IMS domain online charging system to perform credit control processing.
  • the method includes: the service call session control function forwards the service request related to the user to the IMS gateway function according to the user subscription data;
  • the IMS gateway function interacts with the IMS domain online charging system through the standard Ro interface for credit control processing.
  • the S-CSCF entity triggers interaction with the CS domain prepaid system for credit control processing including the steps of:
  • the service call session control function forwards the service request related to the user to the IMS domain service switching function IM-SSF according to the user subscription data;
  • the IMS domain service switching function IM-SSF interacts with the CS domain prepaid system through the CAP interface for credit control processing.
  • the credit control process refers to: the user currently conducts a call in the CS domain, and implements the credit control of the user in the CS domain via the CS domain prepaid system; or, the user Currently, the call is made in the IMS domain, and the user's credit control in the IMS domain is implemented via the IMS domain online charging system; or, the IMS domain and the CS domain prepaid system are respectively implemented in the IMS domain and the CS domain via the IMS domain online charging system and the CS domain prepaid system. Credit control.
  • the credit control process refers to: performing credit control related to online charging only for the domain of the online charging service.
  • the credit control process includes: after detecting that the user's charge in the CS domain and/or the IMS domain is exhausted, the network element performing credit control processing in the IMS performs corresponding control on the current call of the user, including: performing in the IMS domain
  • the network element processed by the credit control terminates the current call of the user, or when the user has a charge in one network domain and has a charge in another network domain, the user is instructed to switch to the network domain that has the fee to conduct the call, or If the user has a charge in the network domain of the current call and the other network domain charges are exhausted, the network element processed by the credit control in the IMS prohibits the current call of the user from being subsequently switched to the network domain where the charge is exhausted.
  • the service related to the CS domain and the IMS domain is a voice call continuity service; and, the CS domain call initiated or accepted by the user is routed to a corresponding call continuity control function (CCCF) entity for anchor timing in the CS domain.
  • CCCF call continuity control function
  • the online charging is not triggered for the user, and after the user related call is anchored to the CCCF entity, credit control processing is performed for the user in the IMS domain.
  • a credit control device comprising:
  • Trigger module a module for triggering online charging
  • the first credit control module is: a module for performing credit control processing on the online charging system of the IMS domain after the online charging is triggered.
  • the credit control device further includes:
  • the selection module is configured to: after triggering online charging, select a module for performing credit control in the IMS domain or the 'CS domain; and the second credit control module is configured to perform interaction with the CS domain prepaid system after triggering online charging A module for credit control processing.
  • a communication system comprising:
  • CS domain control device that does not trigger online charging in the CS domain when a subscriber involved in both the circuit (CS) domain and the IP Multimedia Subsystem (IMS) domain and the online subscriber of the online charging initiates or accepts a call in the circuit (CS) domain ;
  • IMS IP Multimedia Subsystem
  • An IMS domain control device that triggers online charging for credit control processing in the IMS domain when the call is processed via the IMS domain;
  • the present invention provides a method for simultaneously realizing accurate and complete real-time charging/online charging control in the process of performing services involving both the CS domain and the IMS domain by performing centralized credit control in the IMS domain;
  • the invention further improves the cross-domain switching scheme of the static anchor IMS centralized control in the existing voice call continuity service; and the present invention enables the real-time/online charging control to be widely applied in a complicated control scenario.
  • the mode of the prepaid service can continue to be provided, and avoids the problem that the real-time CS/IMS charging association is required to support the roaming or the implementation of the huge amount of engineering is ultimately impossible to implement in order to correctly handle the related expenses; further, this
  • the invention solves the problem that the CS/IMS belongs to different networks and the user has different tariffs in different network domains, and the online charging service control capability is enhanced, which can further promote the comprehensive application of CS, WLAN and IMS networks and satisfy diversification. Operational needs.
  • FIG. 1 is a schematic diagram of cross-domain handover from a user home IMS domain (CCCF) control to a VCC user cross-domain handover in the prior art;
  • CCCF user home IMS domain
  • 2A is a schematic flowchart of a CS domain originating call setup signal and bearer before performing a VCC handover process from a CS domain to an IMS domain in the prior art
  • 2B is a schematic flowchart of a VCC handover initiated by a user from a CS domain to an IMS domain in the prior art
  • 2C is a schematic diagram of a process of establishing signaling and bearer in a process of a user subsequently switching back to a CS domain from an IMS domain in the prior art;
  • FIG. 3 is a schematic structural diagram of a charging system in an IMS domain in the prior art
  • FIG. 4 is a specific embodiment of the present invention, in which the CS domain originating call of the user is anchored to the IMS and triggers online charging, and the CS/IMS online credit control is completed by the IMS during the entire voice call of the user switching to the IMS domain.
  • FIG. 5A is a schematic diagram of real-time interaction between an IMS domain triggered online charging entity and an IMS domain online charging system and a CS domain prepaid system according to an embodiment of the present invention
  • 5B is a schematic diagram of interaction between a CCCF that allocates and triggers online charging for a user and an online charging system and a CS domain prepaid system in the IMS domain according to an embodiment of the present invention
  • 5C is a schematic diagram of an S-CSCF that allocates and triggers online charging for a user to interact with an IMS domain online charging system and a CS domain prepaid system respectively according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a CCCF entity according to an embodiment of the present invention. detailed description
  • the present embodiment performs the CS domain and/or the IMS domain in a specific process involving both the CS domain and the IMS domain, that is, the execution of the voice call continuity service.
  • Online meter The fee (or real-time billing) credit control is taken as an example to describe the solution of the present invention in detail; however, the application of the solution of the present invention is not limited to the execution process of the voice call continuity service, and the principle and method are also applicable to The credit control of the CS domain and/or IMS domain online payment service is performed during the execution of other services involving both the CS domain and the IMS domain.
  • the online charging is sometimes described by taking the prepaid service of the CS domain and the IMS domain as an example.
  • the invention deals with the problem that the voice call continuity (VCC) service and the online charging service are contracted when the related cost is required, and the real-time CS/IMS charging association is required to support the roaming or the implementation of the engineering quantity is huge and the actual implementation cannot be implemented.
  • VCC voice call continuity
  • the circuit (CS) domain call initiated or accepted by the user is routed to the Call Continuity Control Function (CCCF) entity for anchoring, and the online charging (such as prepaid) service is no longer triggered in the CS domain;
  • the online charging is triggered at the IMS to perform centralized credit control processing for the subscriber of the voice call continuity service.
  • the corresponding GSM service control function and/or the service data point may be modified by the user to sign the CS prepaid service.
  • the business logic triggers the relevant data or settings, so that the gsmSCF can judge according to the call related information to determine whether to perform VCC-related call anchoring, thereby determining whether the original online charging/prepaid service is triggered in the current service processing.
  • the call related information includes but is not limited to: bearer capability, and/or, current user location, and/or, called number, and the like.
  • the manner in which online charging is triggered in the IMS domain to implement centralized credit control processing includes:
  • the CCCF entity triggers online credit control directly to the IMS domain online charging system through the standard Ro interface according to the user subscription data.
  • S-CSCF service call session control function
  • the method further includes: a voice call continuity service indication, and/or, current The direction of the call (ie, whether the currently processed call is initiated by the served user or sent by other users to the served user), and/or the network domain in which the current user is talking.
  • the CCCF entity or the S-CSCF entity may determine the P-access-network-info header field content and/or the inter-domain network selection function (eDS: Network Domain Selection) in the session establishment message. The subsequent routing directions are determined.
  • eDS Network Domain Selection
  • the CCCF entity or the S-CSCF entity may determine the callee information based on the callee information in the session setup message.
  • the IMS domain online charging system is notified to perform credit control change, such as the processing of the tariff change, so as to be able to correctly charge.
  • the specific way can be:
  • the network element that triggers the online charging in the IMS reports the change credit control request to the online charging system of the IMS domain, and the original IMS online charging is included in the credit control request.
  • it also includes: a network domain in which the user makes a call before switching, and/or a network domain in which the user makes a call after switching.
  • the network element that triggers online charging in the IMS may be a CCCF entity allocated for the user, or may be an S-CSCF entity allocated for the user; the network element that triggers online charging in the IMS may determine the user switching according to the local record.
  • the network domain in which the call is made before, the content of the P-access-network-info header field in the INVITE requesting the handover determines the network domain in which the call is made after the user switches.
  • the network element that triggers online charging in the IMS adds relevant information of the voice call continuity service in the report information, and the online charging system in the IMS domain can integrate the original IMS online charging service.
  • the required information and the added related information are used to calculate the fee.
  • the related information of the voice call continuity service includes but is not limited to: a voice call continuity service indication, and/or a current call direction, and/or a network domain in which the current user makes a call, and/or a user before the handover The network domain of the call, and/or the network domain where the user makes a call after switching.
  • the CS domain and the IMS domain may have different user accounting systems to respectively store the prepaid data of the user in the CS domain and the IMS domain, for example, in the CS domain and
  • the IMS domain belongs to different operators, etc.; in this case, in order to perform centralized credit control in the IMS, the network element that triggers online charging in the IMS can be indirectly through the IMS domain online charging system and the CS prepaid system.
  • the CS domain and/or IMS domain credit control including real-time tariff deduction and monitoring is simultaneously implemented at a certain ratio via the IMS domain online charging system and the CS prepaid system.
  • the online charging is still triggered in the IMS and the online credit control is performed.
  • the online charging system and/or the CS prepaid system via the IMS domain According to the user signing situation or the indication of the network element triggering online charging in the IMS, the credit control process including real-time tariff deduction and monitoring is not performed on the domain of the unsigned online charging service.
  • the online charging may be triggered by the IMS.
  • the NE performs different control on the current call of the user according to the operation policy, etc., including:
  • the network element that triggers online charging in the IMS domain terminates the current call or indicates the user. Switch to the IMS/CS domain that still has a tariff to continue the current call.
  • the network element that triggers online charging in the IMS domain instructs the user to switch to the current MS/CS to continue the current call through the SIP Notify or INFO message in the circuit domain USSD or IMS domain.
  • the network element that triggers online charging in the IMS domain prohibits the user from switching to the current call. Exhausted network domain.
  • the network element that triggers online charging in the IMS may reject the new session establishment request that the user requests to switch by the CCCF entity for a specific reason value, or indicate that the user prohibits the handover by the SIP Notify or INFO message of the circuit domain USSD or the MS domain respectively. the reason.
  • the CS domain call initiated or accepted by the user may be routed to the corresponding call continuity control function entity to perform the routing control process, and the CDR generated in the CS domain may be controlled to carry the special identifier.
  • the identifier may be a special number that the CCCF entity has, or the GSM service control function indicates a special prefix inserted before the calling number by the GSM service switching function through an existing CAP connection (CONNECT) operation, or a GSM service control function.
  • the free-form charging information delivered to the GSM service switching function is operated by the free-form charging information (FCI) of the existing CAP, and the CS domain charging processing device performs the free processing on the CDRs generated by the CS according to the special identifier.
  • FCI free-form charging information
  • Steps 1 to 5 refer to the "originating" in FIG. CS Call Anchor Processing” section; Steps 6 through 8 refer to the “Session Switching Process” section in Figure 4; Step 9 refers to the “Session Release” section in Figure 4; Step 10 refers to the "Funding Expenses” section in Figure 4. )
  • the user initiates a call at the visited mobile switching center (VMSC) currently registered by the CS.
  • VMSC visited mobile switching center
  • the visited mobile switching center triggers the calling side intelligent service according to the user subscription data, and sends an initial detection point (IDP) message to the gsmSCF responsible for the calling side routing control; at this time, the user initiates the call anchored to the CCCF through the user.
  • IDP initial detection point
  • the gsmSCF control responsible for the routing control of the calling side is implemented. Therefore, by modifying the related data or settings determined by the service logic in the intelligent service platform, the online charging/prepaid service of the CS domain is triggered to be triggered, so that even if the user subscribes to the voice call continuity.
  • the service is triggered to the corresponding gsmSCF, and the online charging/prepaid service logic control is no longer performed; further, the gsmSCF can determine that the voice service continuity service needs to be performed according to the call related information, thereby determining that the user is no longer executed.
  • the user can cancel the corresponding CAMEL subscription data on the CS before the call, that is, directly Avoid CAMEL service triggering to avoid triggering online charging/prepaid services implemented in the CAMEL service mode before CS.
  • the gsmSCF responsible for the routing control of the calling side returns a virtual roaming number (IMRN) pointing to the home domain CCCF through the connection message, and visits the mobile switching center according to the other network elements in the circuit domain, the CS/IMS interworking gateway MGCF, and the IMS.
  • the network element (shown as the inquiry call session control function) routes the CS-IMS intercom call To the CCCF entity assigned to the user.
  • the CCCF entity sends the initial credit control request to the online charging system of the IMS domain according to the subscription data of the user, for example, the online charging service signing, triggering the online charging control of the IMS domain, wherein the original IMS online charging service
  • the method further includes: a voice call continuity service indication, and/or a current call direction (ie, whether the currently processed call is initiated by the served user or other users sent to the served user), and/or , the network domain where the current user is making a call.
  • the online charging system of the IMS domain performs charging control according to the reported information, and returns a credit control response carrying the tariff or service information authorized for use, and the CCCF entity starts credit control accordingly; after that, the CCCF entity accepts the call as the last called party.
  • the CCCF entity association controls the two sessions to establish the IM-MGW segmented VCC user to the peer user's CS domain and IP two-segment bearer connection (to complete the first phase of the originating CS call) Anchoring processing).
  • the user When the user completes the IMS registration and decides to switch to the IMS domain, it sends a session establishment request carrying the initial session information to the CCCF entity, and uses the CCCF entity public service identifier carried therein as a handover indication, requesting the CCCF entity to perform the current setup.
  • the CCCF entity that is performing credit monitoring sends a modified credit control request to the online charging system of the IMS domain, which includes: in addition to the information required for the online charging service of the original IMS domain, the network domain of the user before the handover , and / or, the network domain where the user makes a call after switching.
  • the online charging system of the IMS domain changes the execution of the charging control according to the reported information, and returns a credit control response carrying the tariff or service information authorized for use, and the CCCF entity changes the credit control accordingly; after that, the CCCF entity performs the CS call of the user.
  • the leg is replaced with the IMS call leg.
  • the SIP session transition process is performed on the session segment with the peer end through the UPDATE or re-INVITE to complete the media stream interaction direction, and is released to the VCC user after successfully completing the SIP session transition.
  • the signaling and bearer corresponding to the CS call leg (the second phase of the session switching process is completed, and the subsequent handover process is similar to this, and is not mentioned).
  • the session release request is sent to the CCCF entity, and the S-CSCF entity currently assigned by the network to the user releases the session.
  • the request is routed to the CCCF entity; the CCCF entity performing the credit monitoring interacts with the two users to complete the release of the two sessions, then terminates the credit monitoring and sends the terminated credit control request to the IMS domain online charging system, and the IMS domain online charging system Terminate the charging control according to the reported information, and return the credit control response to end the online charging process; here,
  • the CCCF may also terminate the local credit monitoring process after receiving the credit control response of the online charging system of the IMS domain (the third phase of the session release processing is completed).
  • the CCCF entity that is performing credit monitoring discovers the user's fee before the user actively releases the session (if only the current authorized usage fee is exhausted, the CCCF entity will apply for the new authorization by performing the charging control change, here If the user tariff is completely exhausted as an example, the initiative initiates and interacts with the two users to complete the release of the two sessions, then terminates the credit monitoring and sends the terminated credit control request to the IMS domain online charging system, and the IMS domain online charging system. The charging control is terminated according to the reported information, and the credit control response is returned to end the online charging process. Similarly, in order to facilitate the abnormal processing of interaction with the online charging system of the IMS domain, the CCCF may also receive the online charging system of the IMS domain. After the credit control response, the local credit monitoring process is terminated (so far the completion fee is processed).
  • the VCC user initiates a call in the CS as an example.
  • the CS prepaid trigger avoidance method and the centralized control processing on the IMS The process is basically the same.
  • the initial session is for the user to initiate or accept the session at the IMS
  • the problem of evasion but the user has the same problem when the CS domain initiates a call request directed to the CCCF entity from the IMS domain to the CS domain and can be handled in the same way
  • the centralized control processing process on the IMS The first example is also consistent.
  • the CCCF entity triggers as an example.
  • the S-CSCF entity allocated for the user can also trigger online charging to implement centralized credit control through the IMS gateway function, but the CCCF entity acts as a voice call. Continuous business control points, you can find more relevant information.
  • the network element triggering the online charging in the IMS can interact with the online charging system of the IMS domain, and Indirect real-time interaction between the IMS domain online charging system and the CS domain prepaid system, or the network element that triggers online charging in the IMS can directly interact with the IMS domain online charging system and the CS domain prepaid system, respectively.
  • the specific method is as follows:
  • Mode 1 Real-time interaction between the online charging system and the CS prepaid system in the IMS domain, as shown in Figure 5A.
  • the online charging system of the IMS domain After receiving the credit control request sent by the network element triggering the online charging in the IMS domain, the online charging system of the IMS domain directly performs a credit control request to the CS domain prepaid system including the CS accounting system according to the need, and according to the inclusion
  • the result returned by the CS domain prepaid system of the CS accounting system returns a credit control response to the network element triggering online charging in the IMS domain; the IMS domain online charging system and the CS domain prepaid system including the CS domain accounting system adopt CAMEL Application protocol CAP or other custom protocol interaction.
  • Manner 2 The CCCF entity assigned to the user is directly interacted with the IMS domain online charging system and the CS domain prepaid system, as shown in Figure 5B.
  • the CCCF entity of the network element that triggers online charging in the IMS serves as the IMS domain service switching function IM-SSF, and through the CAP interface to the CS accounting system.
  • the CS prepaid system triggers the prepaid service, performs the credit control request according to the original CAP interface interaction mode of the CS prepaid service, and implements the CS domain credit control including the real-time tariff deduction and monitoring; at this time, the CCCF entity is still as before
  • the credit control including real-time tariff deduction and monitoring is selected in the CS domain and/or the IMS domain according to the network domain in which the user is currently calling and/or a preset policy (eg, in a certain proportion of CS/IMS allocation).
  • the CAP interface lacks the ability to report rate change events in the call, it is necessary to maintain the control relationship between the CCCF entity and the CS domain payment system throughout the call, and charge the call according to the fixed rate, or The CCCF triggers the service control to the CS prepaid system multiple times according to the need to implement deduction and monitoring in the CS implementation tariff.
  • Manner 3 The S-CSCF entity assigned to the user is separately implemented by interacting with the IMS domain online charging system and the CS domain prepaid system, as shown in FIG. 5C.
  • the network element S-CSCF entity that triggers online charging in the IMS triggers the functions of the IM-SSF and the IMS gateway respectively according to the user subscription data, and the IM-SSF passes the CAP interface to the CS domain prepaid system including the CS accounting system. Trigger the prepaid service, perform the credit control request according to the original CAP interface interaction mode of the CS domain prepaid service, and implement the CS domain credit control including the deduction and monitoring of the tariff implementation, and the IMS gateway function through the standard Ro interface and the IMS domain online.
  • the charging system interacts to implement IMS domain credit control; at this time, the S-CSCF entity also needs to select according to the network domain and/or preset policy of the current call of the user (for example, according to a certain proportion in CS/IMS allocation). Credit control including real-time tariff deduction and monitoring is performed in the CS domain and/or IMS domain.
  • the CAP interface lacks the ability to report rate change events in the call, it is also necessary to maintain the control relationship between the M-SSF and the CS prepaid system throughout the call and charge the call according to the fixed rate, or by The IM-SSF triggers the service control to the CS prepaid system multiple times according to the need to implement deduction and monitoring in the CS implementation tariff.
  • the foregoing embodiment illustrates a specific voice call continuity service for a service involving both a CS domain and an IMS domain, but those skilled in the art can see that the online charging/prepaid service is triggered by not being CS. And through the method of triggering online charging in the IMS to perform centralized credit control of the CS domain and/or the IMS domain, the other services involving the CS domain and the IMS domain, such as the CSI service of the integrated CS bearer and the IMS service, can also be solved.
  • the communication system of the present invention can be obtained, including:
  • the CS domain control device is configured to trigger the online charging/prepaid service in the CS domain when the service involving the circuit (CS) domain and the IMS domain and the subscription user of the prepaid service initiates or accepts a call in the circuit (CS) domain.
  • CS domain circuit
  • the CS domain control device is configured to trigger the online charging/prepaid service in the CS domain when the service involving the circuit (CS) domain and the IMS domain and the subscription user of the prepaid service initiates or accepts a call in the circuit (CS) domain.
  • the GSM service control function entity of the online charging/prepaid service logic that the user subscribes to in the CS domain is not triggered.
  • the IMS domain control device is configured to trigger online charging at the IMS for centralized credit control processing when the user related call is processed via the IMS domain.
  • the S-CSCF entity or the application server AS in the IMS domain especially in the voice service continuity service, triggers the online charging S after anchoring the user call to the application server CCCF that controls the voice service continuity service.
  • CCCF application server
  • the IMS domain control device can interact with the IMS domain online charging system as shown in FIG. 5A, and implement indirect interaction with the CS prepaid system through real-time interaction between the IMS domain online charging system and the CS prepaid system.
  • the centralized credit control process is implemented.
  • the IMS domain control device can also interact with the IMS domain online charging system and the CS domain prepaid system to implement centralized credit control processing, as shown in FIGS. 5B and 5C.
  • the IMS domain online charging system and/or the CS domain prepaid system is configured to perform credit control processing on the user according to the credit control request of the IMS domain control device.
  • the CS domain In the voice service continuity service, if the user subscribes to the online charging/prepaid service in the CS domain, the CS domain also has a special prefix inserted according to the CCCF entity or inserted before the calling number, or a GSM service.
  • the CS domain charging system that performs free processing on the CDRs generated by the CS domain for the user-specific CDRs issued by the control function to the GSM service switching function.
  • an application server including a credit control function has a structure as shown in FIG. 6, and includes a trigger module 600, a first credit control module 601, a second credit control module 602, and a selection module 603.
  • the triggering module 600 triggers online charging after receiving the session request; the first credit module 601 interacts with the online charging system of the IMS domain after triggering the online charging to perform credit control processing; the second credit control module 602 is triggering After the charging control, the CS domain prepaid system is exchanged for credit control; the selection module 603 selects credit control in the IMS domain or the CS domain.
  • the control module and the selection module are actually optional, that is, when only the trigger module and the first credit control module are included, the trigger module in the application server triggers online charging according to the user subscription data, and uses the first credit.
  • the control module interacts with the online charging system of the IMS domain directly through the standard Ro interface, and interacts with the CS domain prepaid system through the IMS domain online charging system as shown in FIG. 5A to complete the credit control of the user in the CS domain and the IMS domain.
  • the second credit control module and the selection module are further included, as shown in FIG.
  • the trigger module in the application server triggers online charging according to the user subscription data, and uses the first credit control module to pass the standard Ro.
  • the interface interacts with the online charging system of the IMS domain, and uses its second credit control module to interact with the CS domain prepaid system through the CAP interface, and through its selection module according to the network domain or the preset charging policy in which the user is currently calling. Select, complete user credit control in the CS domain and IMS domain.
  • the present invention provides an accurate and complete real-time charging/online in the process of performing services involving both the CS domain and the IMS domain by performing centralized credit control by triggering the online charging service in the IMS domain.
  • Billing control thereby providing a method for online charging/prepaid service using real-time/online charging control mode; meanwhile, the present invention further improves cross-domain of static anchoring IMS centralized control in existing voice call continuity service
  • the switching scheme enables the online charging/prepaid service that was originally widely applied to continue to be provided in the case of applying the solution, and avoids the need for real-time CS/IMS charging association for correct processing of related expenses.
  • the problem of roaming or implementing a large amount of engineering is ultimately impossible to implement.
  • the solution of the present invention is directed to the control capability of the online charging service for the case where the CS/IMS belongs to different networks and the user has different tariffs in different network domains.

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Description

提供在线计费的方法、 装置及系统
技术领域
本发明涉及通信技术领域， 尤其涉及提供在线计费的方法、 装置及系统。 背景技术
从 3GPP R5阶段开始，通用移动通信系统 UMTS核心网划分为电路交换域 ( CS: Circuit
Switched Domain )> 分組交换域（PS: Packet Switched Domain )和国际互联网协议 IP多媒 体子系统（ IMS： IP Multimedia Subsystem )三个子系统， 其中： CS域用于向用户提供电 路型业务的连接； PS域用于向用户提供分组型业务的连接； IMS是 3GPP R5阶段增加的 叠加在已有分組域之上的一个子系统， 采用分組域为其上层控制信令和媒体传输的承载通 道， 引入会话初始协议 SIP协议作为业务控制协议， 利用 SIP简单、 易扩展、 媒体組合方 便的特点， 通过将业务控制与承载控制分离， 提供丰富的多媒体业务。
IMS中主要的功能实体包括控制用户注册、 会话控制等功能的呼叫控制实体呼叫会话 控制功能 CSCF、提供各种业务逻辑控制功能的应用服务器 AS、 集中管理用户签约数据的 归属用户服务器 HSS以及用于实现与电路交换网互通的媒体网关控制功能 MGCF I IMS媒 体网关 M-MGW,用户通过当前所在地代理节点代理呼叫会话控制功能 P-CSCF接入 IMS, 会话和业务触发控制及与 AS的业务控制交互则由其注册地的归属域服务节点服务呼叫会 话控制功能 S-CSCF完成。
由第三代移动通信标准化伙伴项目 （ 3GPP )标准所定义的 IMS架构全面解决了 IP承 载下提供多媒体业务所需要解决的漫游计费、 业务质量（QoS )、 安全保障等关键的可运营 问题， 其架构和思路已获得业界公认， 3GPP2、 TISPAN均以 3GPP模型作为基础和参照进 行了相应 IP多媒体网络架构和业务体系的定义， 3GPP也已开始了针对无线局域网 WLAN 接入与 UMTS互通（I-WLAN )、 固定宽带接入 IMS ( FBI ) 以及面向多种接入技术的全 IP 网（AIPN )等课题研究， 用户将可以根据其签约通过单一多模终端或多种类型的不同终端 经由不同接入扶术的接入网接入 IMS, 以获得统一的多媒体业务， 包括 VoIP ( IP承载的话 音业务）业务， 在这些课题的研究中将都有可能涉及到同时涉及 CS域和 IMS域的业务。
其中， 3GPP版本 Ί通过了一个研究 CS呼叫与通过无线局域网 WLAN接入 IMS提供 的 IP 载的话音业务（ VoIP业务） 间业务连续性问题的工作课题， 其中包括研究支持 CS 呼叫与通过 WLAN (或其他 IP接入网）接入 IMS提供的 VoIP业务间切换，从而实现话音 通话连续性的方法，以适应网络及业务发展的需求。该话音通话连续性业务是同时涉及 CS 域和 MS域的业务的一个典型代表。
在 3GPP话音通话连续性研究课题中，提出了一种静态锚定到 IMS集中控制的切换方 案， 其基本思想是， 在 IMS归属域为用户分配一个应用服务器 AS作为呼叫连续性控制功 能（ CCCF ),将涉及到该用户的电路城呼叫和 IMS域会话的控制信令都送至该应用服务器 进行锚定， 由 CCCF以第三方控制的方式控制切换用户与对端用户间的通话连接， 并根据 用户请求控制完成跨域切换一也就是说， 将切换用户与对端用户的通话连接在该应用服务 器上分为两段， 当用户需要进行跨域切换时， 由切换用户在切换后的网络域重新建立其到 该应用服务器的连接， 建立成功后由该应用服务器控制在自身到对端用户的连接上进行重 协商， 使得对端用户与切换用户在新的连接上进行话音交互， 如图 1所示， 在切换过程中 由 CCCF控制完成到 VCC用户间两段会话的替换 (迁转）。
图 2A、 图 2B和图 2C所示为现有技术中执行一个 CS始发呼叫由 CS域到 IMS域的 VCC切换以及 IMS域到 CS域的后续 VCC切换中信令与承载的建立过程； 通过该过程， 可以了解到在一个同时涉及 CS域和 IMS域的业务的处理过程中， 在线计费（或称实时计 费）模式以及作为典型的应用实例应用该计费模式的预付费业务所面临的问题。
其中，图 2A所示为执行电路域到 IMS的 VCC切换过程之前 CS域始发呼叫中信令与 承载的建立过程。 在此过程中， VCC 用户的电路域的初始呼叫被控制路由到其归属 IMS 域的 CCCF进行锚定，并建立经 IM-MGW分段的 VCC用户到对端用户的 CS及 IP两段承 载连接（图 2A中假设对端侧在 IMS , 如果对端用户在 PSTN , 那么在 CCCF到对端侧的 连接中， 还将经过一个 MGCF ), 其处理过程如下：
1、 用户在 CS域当前注册的拜访移动交换中心发起呼叫。
2、 该拜访移动交换中心根据用户签约数据触发主叫侧智能业务， 向负责进行主叫侧 路由控制的 GSM业务控制功能 gsmSCF发送初始检测点（IDP ) 消息。
3、 负责进行主叫侧路由控制的 gsmSCF通过连接消息返回一个指向用户归属的 IMS 域的虚拟漫游号码（IMRN ), 拜访移动交换中心据此经过电路域其他网元、 CS/IMS 互通 网关 MGCF以及 IMS相关网元（根据 IMRN的不同， 实际上在 IMS也有不同的处理， 但 这并不是本发明所关注的部分， 如图 2A中所示流程中， IMRN为指向 CCCF的公共业务 标识， IMS相关网元为查询呼叫会话控制功能 I-CSCF )将 CS-IMS互通呼叫路由到为用户 分配的 CCCF。
4、 CCCF作为最后的被叫接受该收到的会话， 并与 HSS交互获得当前为用户分配的 服务呼叫会话控制功能（图中未示出）， 然后根据会话建立请求中携带的信息， 通过该服 务呼叫会话控制功能以该用户的名义重新发起一段到原来的对端用户的呼叫， 并以第三方 控制 3PCC ( a third party call control, 又称路由背靠背用户代理： Routing B2BUA )方式关 联控制两段会话的建立。
5、 最后， 建立了 VCC用户经电路域、 CS-IMS互通网关到其 IMS归属域 CCCF的 CS-IMS互通呼叫以及该 CCCF到对端用户的会话， 并由 CCCF关联控制两段会话建立经 IM-MGW分段的 VCC用户到对端用户的 CS及 IP两段承载连接。 图 2A所示只是初始 CS呼叫锚定到用户归属 IMS域 CCCF的控制实现方式之一， 其 他方式还包括： 用户直接在发起的呼叫中插入前缀或呼叫特殊指向用户归属 IMS域的号 码， 拜访移动交换中心据此前缀或特殊号码控制路由； 同时， 该号码或如上所述的 IMR 可以如图 2所示直接指向 CCCF，也可以指向另一应用服务器，由该应用服务器通过与 HSS 的交互获得当前为用户分配的服务呼叫会话控制功能， 并根据会话建立请求中携带的信息 以该用户的名义重新发起一段到原来的对端用户的呼叫， 并经由当前为用户分配的服务呼 叫会话控制功能根据用户 IMS域签约数据中的初始过滤准则触发至 CCCF等，由于这些过 程并非本发明关注的重点， 因此不再赘述。
此外， 图 2A所示为现有技术中初始的 CS始发呼叫锚定到用户归属 CCCF的过程， 除此之外， 现有技术同样提供了初始 CS终结呼叫锚定到用户归属 CCCF的过程， 其中一 种方法为： 被叫用户归属网关口移动交换中心 GMSC接收到指向用户的呼叫建立请求后， 通过与 HLR的交互获得用户被叫侧 CAMEL签约数据， 并据此触发被叫侧智能业务， 与 负责进行被叫侧路由控制的 GSM业务控制功能 gsmSCF交互获得指向其归属 IMS域的 IMRN, 关口移动交换中心、 CS/IMS互通网关 MGCF以及 IMS相关网元根据上述信息将 该将 CS-IMS互通呼叫路由到为用户分配的 CCCF进行锚定， 此后经过现有技术中跨域路 由选择、 呼叫互通以及 CS呼叫接续等处理， 在 CS域接续到 VCC用户终端， 建立 VCC 用户经电路域、 CS-IMS互通网关到其 IMS归属域 CCCF的 CS-IMS互通呼叫以及该 CCCF 经 IMS相关网元、 CS/IMS互通网关 MGCF以及电路域到对端用户的会话， 并由 CCCF关 联控制两段会话建立经两侧 IM-MGW分段的 VCC用户到对端用户的 CS及 IP承载连接； 同样的， 由于这些过程并非本发明关注的重点， 因此后续不再赘述。
参阅图 2B所示，初始的 CS始发呼叫或终结呼叫锚定到 CCCF之后，用户发起 CS->IMS 的切换处理流程如下：
1、 当用户决定切换到 IMS时， 若尚未进行 IMS注册， 则首先完成 IMS注册（图中未 ' 示出）； 然后发送一个携带初始会话信息的会话建立请求到 CCCF, 以其中携带的 CCCF公 有业务标识作为切换指示， 请求 CCCF执行将当前已建立的 CS域呼叫切换到 IMS域的操 作。
2、 网络当前为用户分配的服务呼叫会话控制功能根据用户签约数据中的初始过滤准 则将会话建立请求路由至 CCCF。
3、 CCCF执行将用户的 CS呼叫腿替换为 IMS呼叫腿的 SIP会话迁转过程， 并在与对 端间的会话段上通过 UPDATE或 re-INVITE完成媒体流交互方向的迁转，至此建立对端用 户与 VCC用户端到端的 IP承载连接。
4、 成功完成 SIP会话迁转后释放到 VCC用户的电路呼叫!^十应的信令和承载。 参阅图 2C所示， 后续切回 CS域过程中的信令与承载建立过程如下： 1、 当决定需要 vcc切换回 cs域时， 若尚未在拜访移动交换中心注册， 则终端首先 在拜访移动交换中心注册（电路域位置更新， 图中未示出）， 随后利用 CCCF公有业务标 识发起一个到 CCCF的电路域呼叫， 利用其中携带的 CCCF公有业务标识作为切换指示请 求 CCCF执行切换回 CS的过程。该电路域呼叫经过 MGCF和问讯或服务呼叫会话控制功 能路由到 CCCF。
2、 CCCF执行与上面所述类似的 SIP会话迁转过程将用户的 IMS呼叫腿替换为 CS呼 叫腿。
3、 成功完成将 IMS呼叫腿替换为 CS呼叫腿的 SIP会话迁转后， 释放到 VCC用户的 IMS呼叫腿对应的信令和承载。
需要说明的是， 以上说明中以后续 IMS域到 CS域的 VCC切换为例， 而其实， 首次 的 IMS域到 CS域的 VCC切换过程与上面描述的后续切回 CS过程一样，在 CCCF的控制 中并不需要感知前面的切换历史。
此外，与图 2A所示的 CS始发呼叫建立过程类似， VCC终端在切换过程中在 CS域建 立与 CCCF间新的呼叫腿的过程也可以有多种不同的选择， 包括： 终端直接发起到一个指 向其归属 IMS域并指示为切换请求的特殊号码 IMR 的呼叫，或者终端发起到一个指示为 切换请求的特殊号码的呼叫， 通过其当前所在的拜访移动交换中心根据用户签约数据触发 主叫侧智能业务， 通过与负责进行主叫侧路由控制的 GSM业务控制功能 gsmSCF交互获 得指向其归属 IMS域的 IMRN, 拜访移动交换中心、 电路域其他网元、 CS/IMS互通网关 MGCF 以及 IMS 相关网元 4艮据上述信息将该将 CS-IMS 互通呼叫路由到为用户分配的 CCCF; 图 2C所示只是其中最简单、 也是效率最高的一种方式。 同样的， 由于这些过程并' 非本发明关注的重点， 因此后续不再赘述。
可以看到， 在这样的一种话音通话连续性实现方案中， 对于以呼叫连接为依据的计费 将产生较大的影响： 对于 VCC用户作为主叫或被叫的初始电路域呼叫， 由于需要路由到 归属的 IMS域， 因此在切换前会同时在电路域和 IMS域建立通话连接， 因此可能导致这 一段时间的重复计费； 而对于一次与对端用户间的通话， 在切换过程中， 会由用户交替在 IMS和 CS + IMS发起建立与 CCCF的呼叫连接， 难以形成完整的计费记录， 而且按照目 前的计费准则， 单次较长时间通话和多次短暂通话， 即使总的时长一样， 计费一般也会存 在差异， 因此即使不考虑上述切换期间的重复计费， 通过在 CS/IMS分别计费的方法还是 难以保障计费的完整性和准确性； 同时， 由于在不同网络域建立呼叫连接、 以及用户作为 主叫和被叫一般都存在费用差异， 因此， 对于这样一种动态地、 灵活地利用两个网絡域建 立和保持呼叫连接的场景， 可能需要更为灵活的计费准则； 而且， 在这一话音业务连续性 方案中， 无论 VCC用户之前是作为主叫还是被叫建立与对端用户间的连接， 切换时均采 用主叫方式新建与 CCCF间的呼叫腿，因此还要确认并根据正确的呼叫方向进行计费处理； 凡此种种， 可见， 在这样一种同时涉及 CS/IMS域的业务的处理过程中， 要实现正确的计 费， 整个过程的计费将变得极为复杂； 特别的， 如果此时仍然采用分别在 CS/IMS进行计 费的方式， 则要实现完整、 准确的计费， 一个最为基本的要求是： 保障 CS/IMS部分的计 费关联， 在此基础上， 还要保障在计费处理中关联两部分信息进行相应的处理。
进一步的， 在当前网络存在一种实时计费或称在线计费模式， 采用该模式的包括广泛 应用的预付费业务，其基本特征是： 用户与网络间没有长期信用关系， 用户预交一定费用， 网络在提供业务的同时进行在线信用控制， 也就是实时扣除所需费用， 当预缴费用全部使 用完后即终止对该用户提供业务。
在目前的 CS域，一般基于移动网增强逻辑客户化应用 CAMEL架构提供预付费业务， 其主要过程是： 在用户发起或接受电路域呼叫时， 在当前所在移动交换中心（对应用户发 起呼叫的情况）或关口移动交换中心（对应用户接受呼叫的情况）作为 GSM业务交换功 能 gsmSSF, 根据用户的 CAMEL签约数据触发智能业务， 与实现预付费业务逻辑控制的 GSM业务控制功能 gsmSCF建立控制连接， gsmSSF上 4艮相关呼叫信息， 并按照 gsmSCF 指示及批准的通话时长在呼叫接续及呼叫过程中监控、上报相应的基本呼叫状态模型事件 和计费报告， gsmSCF根据上报信息实时扣费并根据剩余资费情况决定是否允许用户继续 通话， 从而执行 CS域信用控制； 对应到背景技术介绍的具体实现过程， 也就是在拜访移 动交换中心或关口移动交换中心将呼叫路由至用户归属 IMS域 CCCF前根据用户签约数据 触发基于 CAMEL实现的预付费业务， 由对应的 gsmSCF在呼叫中实现实时资费扣减和根 据资费情况进行是否允许或指示终止呼叫的呼叫控制以执行 CS域信用控制。
在 IMS, 由于业务及计费准则都更为复杂， 因此釆用了图 3所示的针对承载、 会话及 事件等不同层面综合考虑的在线计费系统 OCS, 在 IMS的预付费也将在这一架构中实现； 如图 3所示。 在 IMS域在线计费系统中， 包括承载计费功能 BCF、 事件计费功能 ECF、 会话计费功能 SCF、 费率计算功能 RF以及账务管理功能 ABMF等部件， 基于以上功能， 可以提供以下三种模式的计费， 包括：
立即事件计费 IEC ( Immediate Event Charging ): OCS收到相应请求后向 IMS网元批 准单次操作的费用并执行用户帐户的资费扣减；
资费预留事件计费 ECUR ( eveiat charging with unit reservation ): 资费预留事件计费包 括针对事件的请求、 预留、 释放以及恢复未用资费的处理， 最后进行资费扣减；
资费预留会话计费 SCUR ( Session Charging with Unit Reservation ): 资费预留会话计费 用于会话中的信用控制， 包括针对会话的请求、 预留、 释放、 恢复未用资费以及资费扣减 的处理， 会话中可以重复进行多次上述过程；
IMS网元可以根据业务或运营商策略选择使用上述不同模式； 在话音通话连续性业务 中， 由于是针对话音通话的计费， 因此采用资费预留会话计费模式， 在处理与对应用户相 关的会话过程中通过起始 -更改 -终止信用控制请求向在线计费系统上报相应的信息， 具 体实施时可以通过 IMS网络中的 AS或 S-CSCF与在线计费系统的交互完成。
如前所述，在应用静态锚定到 IMS集中控制的切换方案提供话音通话连续性业务的情 况下， 由于在 VCC用户作为主叫或被叫的初始电路域呼叫时， 需要路由到归属的 IMS域 获得 CCCF的锚定， 因此在切换前会同时在电路域和 IMS域建立通话连接， 而对于一次与 对端用户间的通话，在切换过程中，则会由用户交替在 IMS和 CS + IMS发起建立与 CCCF 的呼叫连接， 因此， 同时或单独应用以上现有技术中的 CS预付费业务提供方式和 IMS在 线计费业务提供方式， 要么导致重复计费， 要么无法完整计费； 同时， 由于用户作为主叫 和被叫情况一般都存在费用差异， 而在切换中均是采用用户发起建立到 CCCF新连接的主 叫流程， 而且单次较长时间通话和多次短暂通话， 即使总的时长一样计费一般也会存在差 异， 因此仅仅单独或同时利用现有技术， 提供需要实时准确判断业务费用的 CS域预付费 业务和 /或 IMS在线计费业务都将无法正确处理相关的费用；而要在分別利用 CS/IMS现有 机制的同时做到保障 CS/IMS部分的计费关联以及保障在计费处理中关联两部分信息进行 相应的处理， 从而保障计费的完整、 准确， 对于这样一个实时性要求很高的处理将非常困 难， 而且难以避免因需向 gsmSCF提供关联及相应事件信息所导致的对现网拜访移动交换 中心或关口移动交换中心的升级需求， 从而影响用户漫游情况下的业务提供， 或者为支持 用户漫游， 需要更改现网所有移动交换中心， 导致实施工程量异常巨大， 从而无法实际实 施。
以上虽然是针对一种具体的同时涉及 CS域和 IMS域的业务， 即话音通话连续性业务 进行相关的说明， 可以想象， 在其他同时涉及 CS域和 IMS域的业务中， 由于同时涉及两 个网络域向用户提供业务,单独或同时利用现有技术提供需要实时准确判断业务费用的 CS 域预付费业务和 /或 IMS在线计费业务，也会存在类似的问题。这些同时涉及 CS域和 IMS 域的业务包括： 综合利用 CS承载和 IMS的 CSI业务， 以及利用 IMS向通过 CS和 /或 IMS 域接入网络的用户提供集中业务控制的集中控制业务。 发明内容
本发明提供一种提供在线计费的方法、 装置及系统， 以解决采用现有在线计费技术方 案， 无法在执行同时涉及 CS域和 IMS域的业务的过程中正确处理相关费用的问题； 进一 步的， 解决为正确处理相关费用需要进行实时的 CS/IMS计费关联， 导致无法支持漫游或 者实施工程量巨大而无法实际实施的问题。
本发明提供以下技术方案：
一种提供在线计费的方法， 该方法包括如下步骤：
在签约了同时涉及 CS域和 IMS域的业务以及需要在线计费的用户发起或接受 CS域 呼叫时， 不在 CS域针对该用户触发在线计费； 以及 在所述用户相关呼叫经由 IMS域进行处理时， 在 IMS域对所述用户进行信用控制处 理。
其中：
通过取消用户在 CS域上实现在线计费的 CAMEL签约数据，实现不在 CS域对该用户 触发在线计费； 或者， 通过修改智能业务平台中的业务数据， 实现不在 CS域对该用户触 发在线计费。
所述修改智能业务平台中的业务数据是指修改 GSM业务控制功能实体和 /或业务数据 点中业务逻辑判断的相关数据或设置， 当所迷用户的相关呼叫被触发到 GSM业务控制功 能实体后， 该 GSM业务控制功能实体进一步根据呼叫相关信息判断需要执行所述同时涉 及 CS域和 IMS域的业务时， 不触发该用户在 CS域签约的在线计费业务逻辑。
由控制所述同时涉及 CS域和 IMS域的业务的应用服务器与 IMS域在线计费系统和 / 或 CS域预付费系统交互， 进行信用控制处理。
当用户同时在 CS域和 IMS域签约在线计费业务时， 控制所述同时涉及 CS域和 IMS 域的业务的应用服务器根据用户签约数据， 直接通过标准的 Ro接口与 IMS域在线计费系 统交互， 并通过 IMS域在线计费系统与 CS域预付费系统进行交互， 完成用户在 CS域和 IMS域的信用控制； 或者， 控制所述同时涉及 CS域和 IMS域的业务的应用服务器根据用 户签约数据，分别通过标准的 Ro接口与 IMS域在线计费系统交互， 以及通过 CAP接口与 CS域预付费系统进行交互， 完成用户在 CS域和 IMS域的信用控制。 . 由分配给用户的服务呼叫会话控制功能（S-CSCF ) 实体与 IMS域在线计费系统和 /或 CS域预付费系统交互， 进行信用控制处理。
当用户同时在 CS域和 IMS域签约在线计费业务时， 分配给用户的服务呼叫会话控制 功能实体与 IMS域在线计费系统交互，并通过 MS域在线计费系统与 CS域预付费系统进 行交互， 完成用户在 CS域和 IMS域的信用控制； 或者， 分配给用户的 Λ艮务呼叫会话控制 功能实体根据用户签约数据， 分别与 IMS域在线计费系统和 CS域预付费系统交互， 完成 用户在 IMS域和 CS域的信用控制。
其中：
S-CSCF实体触发与 IMS域在线计费系统的交互进行信用控制处理包括步骤： 服务呼叫会话控制功能根据用户签约数据将与用户相关的业务请求转发至 IMS 网关 功能；
IMS网关功能通过标准的 Ro接口与 IMS域在线计费系统交互进行信用控制处理。
S-CSCF实体触发与 CS域预付费系统的交互进行信用控制处理包括步骤：
服务呼叫会话控制功能根据用户签约数据将与用户相关的业务请求转发至 IMS 域业 务交换功能 IM-SSF; IMS域业务交换功能 IM-SSF通过 CAP接口与 CS域预付费系统交互进行信用控制处 理。
当用户同时在 CS域和 IMS域签约在线计费业务时， 所述信用控制处理是指： 用户当 前在 CS域进行通话， 经由 CS域预付费系统实施用户在 CS域的信用控制； 或者， 用户当 前在 IMS域进行通话， 经由 IMS域在线计费系统实施用户在 IMS域的信用控制； 或者， 经由 IMS域在线计费系统和 CS域预付费系统按一定比例分别实施用户在 IMS域和 CS域 的信用控制。
当用户只在 CS或 IMS其中一个域签约在线计费业务时， 所述信用控制处理是指： 仅 对签约在线计费业务的域进行与在线计费相关的信用控制。
所述信用控制处理包括： 当检测到用户在 CS域和 /或 IMS域的资费用尽后， 由 IMS 中进行信用控制处理的网元对用户当前通话进行相应的控制， 包括： IMS域中进行信用控 制处理的网元终止用户当前通话， 或者， 当用户在一个网络域的资费用尽而在另一个网络 域尚有资费时， 指示用户切换到该尚有资费的网络域进行通话， 或者， 若用户在当前通话 的网络域尚有资费而在其他网络域资费用尽时，由 IMS中进行信用控制处理的网元禁止用 户当前通话在后续切换至资费用尽的网络域。
所述同时涉及 CS域和 IMS域的业务为话音通话连续性业务； 并且， 将所述用户发起 或接受的 CS域呼叫路由到相应的呼叫连续性控制功能 ( CCCF ) 实体进行锚定时在 CS域 不针对所述用户触发在线计费， 以及在将所迷用户相关呼叫锚定到所述 CCCF实体后， 在 IMS域针对该用户进行信用控制处理。
一种信用控制设备， 包括：
触发模块： 用于触发在线计费的模块；
第一信用控制模块： 用于在触发在线计费后， 与 IMS域在线计费系统交互进行信用控 制处理的模块。
所述信用控制设备还包括：
选择模块： 用于在触发在线计费后， 选择进行在 IMS域或' CS域的信用控制的模块； 第二信用控制模块： 用于在触发在线计费后， 与 CS域预付费系统交互进行信用控制 处理的模块。
一种通信系统， 包括：
在同时涉及电路 ( CS )域和 IP多媒体子系统（ IMS )域的业务以及在线计费的签约用 户发起或接受电路（ CS )域的呼叫时， 不在 CS域触发在线计费的 CS域控制设备；
在呼叫经由 IMS域进行处理时， 在 IMS域触发在线计费以进行信用控制处理的 IMS 域控制设备；
根据所述 IMS域控制设备的信用控制请求对用户进行信用控制处理的 IMS域在线计 费系统和 /或 CS域预付费系统。
本发明通过在 IMS域进行集中的信用控制， 提供了一种在执行同时涉及 CS域和 IMS 域的业务的过程中同时实现准确、 完整的实时计费 /在线计费控制的方法； 同时， 本发明进 一步完善了现有的话音通话连续性业务中静态锚定 IMS集中控制的跨域切换方案；通过本 发明， 使得在复杂的控制场景下， 原来广为应用的、 采用实时 /在线计费控制模式的预付费 业务能够继续提供， 而且避免了为正确处理相关费用， 需要进行实时的 CS/IMS计费关联 而导致的无法支持漫游或者实施工程量巨大最终无法实际实施的问题； 进一步的， 本发明 方案针对 CS/IMS分属不同网络及用户在不同网络域进行通话存在资费差异等情况对在线 计费业务控制能力进行了增强， 能够进一步促进 CS、 WLAN及 IMS网络的综合应用和满 足多样化的运营需求。 附图说明
图 1为现有技术中由用户归属 IMS域（ CCCF )控制完成到 VCC用户跨域切换的示意 图；
图 2A为现有技术中执行 CS域到 IMS域的 VCC切换过程之前 CS域始发呼叫建立信 令与承载的流程示意图；
图 2B为现有技术中用户发起 CS域到 IMS域的 VCC切换的流程示意图；
图 2C为现有技术中用户后续从 IMS域切回 CS域过程中建立信令与承载的流程示意 图；
图 3为现有技术中 IMS域的在计费系统结构示意图；
图 4为本发明中一个具体实施例中， 用户的 CS域始发呼叫锚定到 IMS并触发在线计 费，以及用户切换到 IMS域的整个话音通话过程中由 IMS完成 CS/IMS在线信用控制的流 程图；
图 5A为本发明中实施例中 IMS域触发在线计费的实体通过 IMS域在线计费系统与 CS域预付费系统之间实时交互的示意图；
图 5B为本发明实施例中为用户分配、 触发在线计费的 CCCF分别与 IMS域在线计费 系统和 CS域预付费系统交互的示意图；
图 5C为本发明实施例中为用户分配、 触发在线计费的 S-CSCF分別与 IMS域在线计 费系统和 CS域预付费系统交互的示意图；
图 6为本发明实施例中 CCCF实体的结构示意图。 具体实施方式
为了更为清晰地描述所发明的方法及系统， 本实施例以在一种具体的同时涉及 CS域 和 IMS域的业务， 即话音通话连续性业务的执行过程中执行 CS域和 /或 IMS域的在线计 费（或称实时计费）信用控制为例， 对本发明方案进行祥细说明； 但是本发明方案的应用 并不仅限于这一话音通话连续性业务的执行过程， 其原理和方法也同样适用于在其他同时 涉及 CS域和 IMS域的业务的执行过程中执行 CS域和 /或 IMS域在线付费业务的信用控制。 所述在线计费在本实施例中有时也以 CS域和 IMS域的预付费业务为例进行说明。
针对在应用静态锚定到 IMS集中控制的切换方案提供话音通话连续性的情况下，同时 或单独应用原有 CS域和 IMS域的在线计费业务提供方式无法正确计费的问题， 以及为正 确处理相关费用， 需要进行实时的 CS/IMS计费关联而导致的无法支持漫游或者实施工程 量巨大最终无法实际实施的问题， 本发明在将话音通话连续性（VCC )业务和在线计费业 务签约用户发起或接受的电路（CS )域呼叫路由到呼叫连续性控制功能（CCCF ) 实体进 行锚定的过程中， 在 CS域不再触发在线计费（如预付费）业务;. 同时， 在话音通话连续 性业务签约用户初始呼叫锚定到为其分配的 CCCF实体后，在 IMS触发在线计费以进行对 该话音通话连续性业务签约用户的集中的信用控制处理。
为了做到对用户在 CS发起或接受的呼叫不再在 CS域触发在线计费 /预付费业务， 可 以采用以下方式：
( 1 )通过在呼叫前删除签约话音连续性业务和 CS域在线计费 /预付费业务的签约用 户在 CS上实现在线计费 /预付费业务的 CAMEL签約数据实现（这种方式下， 在用户取消 话音连续性业务后需要恢复实现在线计费 /预付费业务的 CAMEL签约数据）， 包括该用户 的主叫侧 CAMEL签约数据和 /或被叫侧 CAMEL签约数据。
( 2 )通过修改智能业务平台业务数据实现，即删除对应的 GSM业务控制功能和 /或业 务数据点上该用户签约 CS在线计费 /预付费业务的业务逻辑触发相关数据， 使得即使因用 户签约其他智能业务而被触发到对应的 gsmSCF , 也不再执行在线计费 /预付费业务逻辑控 制。
或者， 进一步的， 当通过修改智能业务平台业务数据规避原有在线计费 /预付费业务逻 辑控制时， 可以是修改对应的 GSM业务控制功能和 /或业务数据点上该用户签约 CS预付 费业务的业务逻辑触发相关数据或设置， 这样， gsmSCF可以依据呼叫相关信息进行判断， 确定是否要进行 VCC相关的呼叫锚定， 从而确定是否在本次业务处理中触发原有在线计 费 /预付费业务逻辑控制。 该呼叫相关信息包括但不限于： 承载能力， 和 /或， 当前用户位 置， 和 /或， 被叫号码等。
在 IMS域触发在线计费以实现集中的信用控制处理的方式包括：
( 1 )通过为用户分配的 CCCF实体向 IMS域在线计费系统触发。
所迷 CCCF实体根据用户签约数据， 直接通过标准的 Ro接口向 IMS域在线计费系统 触发在线信用控制。
( 2 )通过为该用户分配的服务呼叫会话控制功能（S-CSCF )实体， 经过 IMS网关功 能向 IMS域在线计费系统触发。其具体处理为： 服务呼叫会话控制功能根据用户签约数据 将与用户相关的业务请求转发至 IMS网关功能， IMS网关功能通过标准的 Ro接口向 IMS 域在线计费系统触发在线计费业务。
在 CCCF实体或 S-CSCF实体向 IMS域在线计费系统上报的信用控制请求中 > 除原有 IMS在线计费业务所需信息外， 还包括： 话音通话连续性业务指示， 和 /或， 当前呼叫方向 (即当前处理的呼叫是由所服务的用户发起的还是其他用户发往所服务的用户的），和 /或， 当前用户进行通话的网络域等信息。
对于用户当前进行通话的网络域信息： CCCF实体或 S- CSCF实体可以根据会话建立 消息中的 P-access-network-info头域内容和 /或跨域网络选择功能 ( eDS: Network Domain Selection )确定的后续路由方向来确定。
对于当前呼叫方向信息， CCCF实体或 S-CSCF实体可以根据会话建立消息中主被叫 信息来确定。
进一步的， 在话音通话连续性业务签约用户通话过程中发生切换时，通知 IMS域在线 计费系统进行信用控制变更， 如资费变化的处理， 以便能够正确计费。 其具体的方式可以 为：
当用户请求话音通话连续性业务中的跨域切换时， 由 IMS 中触发在线计费的网元向 IMS域在线计费系统上报更改信用控制请求，该信用控制请求中除原有 IMS在线计费业务 所需信息外， 还包括： 切换前用户进行通话的网络域， 和 /或， 切换后用户进行通话的网絡 域等信息。 其中， 所述 IMS中触发在线计费的网元可以是为用户分配的 CCCF实体， 也可 以是为用户分配的 S-CSCF实体； IMS中触发在线计费的网元可以根据本地记录确定用户 切换前进行通话的网络域， 居请求切换的 INVITE中 P-access-network-info头域内容确定 用户切换后进行通话的网络域。
如上所述， 为了能够正确计费， IMS中触发在线计费的网元在上报信息中增加话音通 话连续性业务的相关信息， 而 IMS域在线计费系统则可以综合原有 IMS在线计费业务所 需信息和增加的所述相关信息计算费用。 所述话音通话连续性业务的相关信息包括但不限 于： 话音通话连续性业务指示， 和 /或， 当前呼叫方向， 和 /或， 当前用户进行通话的网络 域， 和 /或， 切换前用户进行通话的网络域， 和 /或， 切换后用户进行通话的网络域。
当用户同时在 CS域和 IMS域签约在线计费业务时 , CS域和 IMS域可能存在不同的 用户账务系统以分别保存有用户在 CS域和 IMS域的预付费数据， 比如在 CS域和 IMS域 属于不同的运营商等情况下； 此时， 为在 IMS执行集中的信用控制， IMS中触发在线计费 的网元可以通过 IMS域在线计费系统与 CS预付费系统之间进行间接的实时交互， 以同时 完成在 CS和 IMS的信用控制； 也可以由 IMS中触发在线计费的网元分别与 IMS域在线 计费系统和 CS域预付费系统交互， 以同时完成在 CS域和 IMS域的信用控制。 不论采用 以上哪种方式完成 CS域和 /或 IMS域的在线信用控制，具体信用控制的执行主要有以下几 种方式：
( 1 )才艮据用户当前在哪个网络域进行通话， 决定在对应的网络域进行信用控制， 也 就是说，用户当前在 CS域进行通话，则经由 CS域预付费系统实施包括实时资费扣减和监 控的 CS域信用控制； 用户当前在 IMS进行通话， 则经由 IMS域在线计费系统实施包括实 时资费扣减和监控的 IMS域信用控制。
( 2 )不考虑用户当前在那个域进行通话， 经由 IMS域在线计费系统和 CS预付费系 统按一定比例同时实施包括实时资费扣减和监控的 CS域和 /或 IMS域信用控制。
而当用户只在 CS域或 IMS域其中一个域签约在线计费业务时，仍然在 IMS触发在线 计费并执行在线信用控制， 此时， 经由 IMS域在线计费系统和 /或 CS预付费系统根据用户 签约情况或 IMS中触发在线计费的网元指示，不对未签约在线计费业务的域进行包括实时 资费扣减和监控的信用控制处理。
当 CS预付费系统和 /或 IMS域在线计费系统、 和 /或 IMS中触发在线计费的网元检测 到用户在 CS和 /或 IMS资费用尽后， 可以由 IMS中触发在线计费的网元根据运营策略等 判断对用户当前通话进行不同的控制， 包括：
( 1 ) 当 CS域和 IMS域存在不同的用户账务系统， 并才艮据用户当前在哪个网络域进 行通话， 决定在对应的网络域进行信用控制时：
A、 CS域资费用尽且用户当前在 CS域进行通话， 或者， IMS域资费用尽且用户当前 在 IMS域进行通话， 则 IMS域中触发在线计费的网元终止用户当前通话或指示用户切换 至尚有资费的 IMS/CS域继续当前通话。
IMS 域中触发在线计费的网元根据用户当前进行通话的网络域， 分别通过电路域 USSD或 IMS域的 SIP Notify或 INFO消息指示用户切换至尚有资费的 MS/CS继续当前通 话。
B、 CS域资费用尽而用户当前在 IMS域进行通话， 或 IMS域资费用尽而用户当前在 CS域进行通话， 则 IMS域中触发在线计费的网元禁止用户当前通话后续切换至资费用尽 的网路域。
IMS中触发在线计费的网元可以通过 CCCF实体以特定原因值拒绝用户请求切换的新 建会话建立请求， 或者分別通过电路域 USSD或 MS域的 SIP Notify或 INFO消息指示用 户向用户指示禁止切换的原因。
( 2 ) 当 CS域和 IMS域使用同一账务系统， 或者不区分用户当前在哪个域进行通话， 对用户按一定比例同时实施 CS域和 IMS域信用控制时， 则无论用户当前在哪个域进行通 话，一旦用户在 CS和 /或 IMS资费用尽， IMS中触发在线计费的网元即终止用户当前通话。
由于在 CS域不再触发在线计费 /预付费业务， 按照现有技术， 在建立 CS通话后在 CS 域将会产生后付费话单。 为了避免造成计费错误， 可以在将所述用户发起或接受的 CS域 呼叫路由到相应的呼叫连续性控制功能实体进行锚定的路由控制过程中， 控制在 CS域产 生的话单中携带特殊标识， 该标识可以是所述 CCCF实体具有的特殊的号码， 或者 GSM 业务控制功能通过现有 CAP的连接 ( CONNECT )操作指示 GSM业务交换功能在主叫号 码前插入的特殊前缀， 或者 GSM业务控制功能通过现有 CAP的自由格式计费信息（ FCI ) 操作向 GSM业务交换功能下发的自由格式计费信息， CS域计费处理设备根据该特殊标 识对 CS产生的话单进行免费处理。
以下通过具体实例并结合附图进行详细说明：
实例一、
以用户在 CS发起呼叫， 锚定到 CCCF后后续请求切换到 IMS, 且 CCCF触发 IMS在 线计费为例， 具体过程如图 4所示： （其中步骤 1至 5参阅图 4中的 "始发 CS呼叫锚定处 理"部分； 步驟 6至 8参阅图 4 中的 "会话切换处理" 部分； 步骤 9参阅图 4中的 "会话 释放" 部分； 步驟 10参阅图 4中的 "资费用尽" 部分）
需要说明的是， 如前所述， 现有技术中目前针对 CS始发呼叫锚定以及 CS与 IMS跨 域切换的实现提供了一些实现细节上各不相同的方案， 但这些不同的实现大都与本专利方 案的实现无关， 因此， 在本实施例中仅采用图 2所示 CS始发呼叫锚定至 CCCF并进行 CS 到 IMS切换的流程为基础， 对于现有技术中与本专利方案无关的不同实现过程不再赘述， 但本发明方案完全可以应用于其他实现过程。
1、 用户其在 CS当前注册的拜访移动交换中心（ VMSC )发起呼叫。
2、 该拜访移动交换中心根据用户签约数据触发主叫侧智能业务， 向负责主叫侧路由 控制的 gsmSCF发送初始检测点（IDP )消息； 此时， 由于用户始发呼叫锚定到 CCCF是 通过负责主叫侧路由控制的 gsmSCF控制实现的， 因此通过修改智能业务平台中业务逻辑 判断的相关数据或设置以避免 CS域的在线计费 /预付费业务触发， 使得即使因用户签约话 音通话连续性业务而被触发到对应的 gsmSCF,也不再执行在线计费 /预付费业务逻辑控制； 而且， 进一步的， gsmSCF 可以根据呼叫相关信息判断需要执行话音业务连续性业务， 从 而确定不再执行该用户在 CS域签约的在线计费 /预付费业务逻辑控制。
如果话音通话连续性业务中始发呼叫锚定到 CCCF采用其他非 CAMEL方案实现， 而 且用户也没有签约其他智能业务，则可以通过在呼叫前取消所述用户在 CS上相应 CAMEL 签约数据， 即直接避免 CAMEL业务触发来实现避免 CS 前以 CAMEL业务方式实现的 在线计费 /预付费业务的触发。
3、 负责主叫侧路由控制的 gsmSCF通过连接消息返回一个指向用户归属域 CCCF的 虚拟漫游号码（IMRN ), 拜访移动交换中心据此经过电路域其他网元、 CS/IMS 互通网关 MGCF以及 IMS相关网元（图中所示为问讯呼叫会话控制功能）将 CS-IMS互通呼叫路由 到为用户分配的 CCCF实体。
4、 CCCF实体根据用户签约数据， 比如， 在线计费业务签约， 触发 IMS域在线计费 控制， 向 IMS域在线计费系统发送起始的信用控制请求， 其中除原有 IMS在线计费业务 所需信息外， 还包括： 话音通话连续性业务指示， 和 /或， 当前呼叫方向（即当前处理的呼 叫是由所服务的用户发起的还是其他用户发往所服务的用户的）， 和 /或， 当前用户进行通 话的网络域。
5、 IMS 域在线计费系统根据上报信息执行计费控制， 并返回携带授权使用的资费或 业务信息的信用控制应答， CCCF实体据此启动信用控制； 之后， CCCF 实体作为最后的 被叫接受该收到的会话，并与 HSS交互获得当前为用户分配的服务呼叫会话控制功能， 然 后根据会话建立请求中携带的信息， 通过该服务呼叫会话控制功能以该用户的名义重新发 起一段到原来的对端用户的呼叫， 并以第三方控制 3PCC方式关联控制两段会话的建立， 最终建立 VCC用户经电路域、 CS-IMS互通网关到其 IMS归属域 CCCF实体的 CS- MS互 通呼叫以及该 CCCF 实体到对端用户的会话， 并由 CCCF 实体关联控制两段会话建立经 IM-MGW分段的 VCC用户到对端用户的 CS域及 IP两段承载连接 (至此完成第一阶段的 始发 CS呼叫锚定处理）。
6、 当用户完成 IMS注册并决定切换到 IMS域时， 发送一个携带初始会话信息的会话 建立请求到 CCCF实体，以其中携带的 CCCF实体公有业务标识作为切换指示，请求 CCCF 实体执行将当前巳建立的 CS域呼叫切换到 IMS域的操作； 网络当前为用户分配的服务呼 叫会话控制功能根据用户签约数据中的初始过滤准则将 ^^建立请求路由至 CCCF实体。
7、正在执行信用监控的 CCCF实体向 IMS域在线计费系统发送更改的信用控制请求， 其中除原有 IMS域的在线计费业务所需信息外， 还包括： 切换前用户进行通话的网络域， 和 /或， 切换后用户进行通话的网络域。
8、 IMS 域在线计费系统根据上报信息更改执行计费控制， 并返回携带授权使用的资 费或业务信息的信用控制应答， CCCF实体据此更改信用控制； 之后， CCCF实体执行将 用户的 CS呼叫腿替换为 IMS呼叫腿的 SIP会话迁转过程， 在与对端间的会话段上通过 UPDATE或 re-INVITE完成媒体流交互方向的迁转， 并在成功完成 SIP会话迁转后释放到 VCC用户的 CS呼叫腿对应的信令和承载（至此完成第二阶段的会话切换处理， 后续切换 处理过程与此类似， 不再赞述）。
9、 当用户决定结束本次通话时（以所服务的话音通话连续性业务签约用户发起呼叫 释放为例），发送会话释放请求到 CCCF实体， 网络当前为用户分配的 S-CSCF实体将会话 释放请求路由至 CCCF实体； 正在执行信用监控的 CCCF实体与两侧用户交互完成两段会 话的释放， 然后终止信用监控并向 IMS域在线计费系统发送终止的信用控制请求， IMS域 在线计费系统根据上报信息终止计费控制，并返回信用控制应答结束在线计费过程；这里， 为了方便与 IMS域在线计费系统交互的异常处理， CCCF也可以在收到 IMS域在线计费系 统的信用控制应答后再结束本地的信用监控处理（至此完成第三阶段的会话释放处理）。
10、 如果在用户主动释放会话前， 正在执行信用监控的 CCCF实体发现用户资费用尽 (若只是当前授权使用资费用尽， CCCF实体将通过上报信息更改执行计费控制申请新的 授权， 此处以用户资费完全用尽为例）， 则主动发起并与两侧用户交互完成两段会话的释 放， 然后终止信用监控并向 IMS域在线计费系统发送终止的信用控制请求， IMS域在线计 费系统根据上报信息终止计费控制， 并返回信用控制应答结束在线计费过程； 同样的， 这 里为了方便与 IMS域在线计费系统交互的异常处理， CCCF也可以在收到 IMS域在线计费 系统的信用控制应答后再结束本地的信用监控处理（至此完成资费用尽处理）。
实例一中以 VCC用户在 CS发起呼叫为例进行说明，对于用户在 CS接受呼叫的情况 > 虽然其锚定过程与始发呼叫不同， 但 CS预付费触发的规避方法和 IMS上的集中控制处理 过程是基本一致的。
对于初始会话为用户在 IMS发起或接受会话的情况， 与上述流程相比， 没有在 CS域 控制路由至 IMS归属域的过程，因此也不存在初始呼叫建立时 CS域在线计费 /预付费触发 的规避问题（但用户在 CS域发起指向 CCCF实体的呼叫请求由 IMS域切换至 CS域时则 存在同样问题并可采用同样方式处理）， 除此之外， IMS 上的集中控制处理过程与本实例 一也是一致的。
本实例一以 CCCF 实体触发为例， 根据现有 IMS 在线计费技术， 在为用户分配的 S-CSCF实体通过 IMS网关功能同样可以触发在线计费实现集中的信用控制， 不过 CCCF 实体作为话音通话连续性业务控制点， 可以了解到更多的相关信息。
另外， 为了更为集中地说明在话音通话连续性业务中的信用控制过程， 在本实施例中 仅描述了 IMS中触发在线计费的网元与 IMS域在线计费系统间的信用控制交互，当 CS域 和 IMS域存在不同的用户账务系统以分别保存用户在 CS域和 IMS域的预付费数据时，则 需要按照实施例二中提供的方式与 CS域预付费系统和 /或 IMS域在线计费系统交互完成在 线信用控制。
实例二、
当 CS域和 IMS域存在不同的用户账务系统以分别保存用户在 CS域和 IMS域的预付 费数据时， IMS中触发在线计费的网元可以与 IMS域在线计费系统交互， 并通过 IMS域 在线计费系统与 CS域预付费系统之间进行间接的实时交互， 或者， IMS中触发在线计费 的网元也可以直接分别与 IMS域在线计费系统和 CS域预付费系统交互， 以完成在 CS域 和 IMS域的资费扣减， 具体方式如下：
方式 1 : 通过 IMS域在线计费系统和 CS预付费系统之间的实时交互实现， 如图 5 A 所示。 IMS域在线计费系统在收到 IMS域中触发在线计费的网元发来的信用控制请求后，根 据需要直接向包含 CS账务系统的 CS域预付费系统进行信用控制请求，并根据包含 CS账 务系统的 CS域预付费系统返回的结果向 IMS域中触发在线计费的网元返回信用控制应 答; IMS域在线计费系统与包含 CS域账务系统的 CS域预付费系统采用 CAMEL应用协议 CAP或其他自定义协议交互。
方式 2: 通过为用户分配的 CCCF实体分别与 IMS域在线计费系统和 CS域预付费系 统直接交互实现， 如图 5B所示。
除通过标准的 Ro接口与 IMS域在线计费系统交互之外， IMS中触发在线计费的网元 的 CCCF实体同时作为 IMS域业务交换功能 IM-SSF, 通过 CAP接口向包括 CS账务系统 的 CS预付费系统触发预付费业务， 按照 CS预付费业务原有 CAP接口交互方式进行信用 控制请求并实施包括实时资费实施扣减和监控的 CS域信用控制； 此时， CCCF实体还要 如前所述根据用户当前呼叫所在网络域和 /或预设策略（如按一定比例在 CS/IMS分摊）选 择在 CS域和 /或 IMS域进行包括实时资费扣减和监控的信用控制。 此外， 由于 CAP接口 缺乏呼叫中上报费率变更事件的能力， 需要在整个通话过程中一直保持 CCCF实体与 CS 域领付费系统之间的控制关系，并根据固定费率按一次通话计费，或者由 CCCF根据在 CS 实施资费实施扣减和监控的需要， 多次触发到 CS预付费系统的业务控制。
方式 3: 通过为用户分配的 S-CSCF实体分别与 IMS域在线计费系统和 CS域预付费 系统交互实现， 如图 5C所示。
由 IMS中触发在线计费的网元 S-CSCF实体根据用户签约数据同时分别触发到 IM-SSF 和 IMS网关功能， 并由 IM-SSF通过 CAP接口向包括 CS账务系统的 CS域预付费系统触 发预付费业务，按照 CS域预付费业务原有 CAP接口交互方式进行信用控制请求并实施包 括资费实施扣减和监控的 CS域信用控制，以及由 IMS网关功能通过标准的 Ro接口与 IMS 域在线计费系统交互， 以实施 IMS域信用控制； 此时， S-CSCF实体还要如前所述根据用 户当前呼叫所在网络域和 /或预设策略 (如按一定比例在 CS/IMS分摊 )选择在 CS域和 /或 IMS域进行包括实时资费扣减和监控的信用控制。此外，由于 CAP接口缺乏呼叫中上报费 率变更事件的能力，同样需要在整个通话过程中一直保持 M-SSF与 CS预付费系统间的控 制关系并根据固定费率按一次通话计费，或者由 IM-SSF根据在 CS实施资费实施扣减和监 控的需要， 多次触发到 CS预付费系统的业务控制。
上述实施方式说明虽然针对同时涉及 CS域和 IMS域的业务中一种具体的话音通话连 续性业务， 但是， 熟悉本领域的技术人员可以看到， 其中通过不在 CS触发在线计费 /预付 费业务， 并通过在 IMS触发在线计费从而进行 CS域和 /或 IMS域的集中的信用控制的方 法，同样可以解决其他同时涉及 CS域和 IMS域的业务，如综合 CS承载及 IMS业务的 CSI 业务， 以及利用 IMS向通过 CS和 /或 IMS域接入网络的用户提供集中业务控制的集中控 制业务中，单独或同时应用现有 CS域在线计费 /预付费业务和 IMS在线计费业务所可能导 致的无法准确、 完整计费或者无法避免 CS域和 /或 IMS域重复计费的问题， 只是在具体的 与业务相关的事件或信息的处理上， 如以上实施例中涉及的 VCC跨域切换相关事件及其 具体信息的处理，以及处理该同时涉及 CS域和 IMS域的业务的应用服务器有所不同而已。
相应的， 根据上述描述可以得到本发明的通信系统， 包括：
CS域控制设备， 用于在同时涉及电路（ CS )域和 IMS域的业务以及预付费业务的签 约用户发起或接受电路（CS )域的呼叫时， 不在 CS域触发在线计费 /预付费业务。 如， 在 话音业务连续性业务中在将用户发起或接受的 CS域呼叫锚定到其归属 IMS域过程中， 在 向用户拜访移动交换中心以及关口移动交换中心提供的用户业务签约数据中取消用户在 CS域上实现在线计费 /预付费业务的 CAMEL签约数椐以实现不在 CS域针对该用户触发在 线计费 /预付费业务的用户归属 HLR, 或者收到所迷用户相关呼叫触发消息后， 进一步根 据呼叫相关信息判断需要执行所述同时涉及 CS域和 IMS域的业务时，不触发该用户在 CS 域签约的在线计费 /预付费业务逻辑的 GSM业务控制功能实体等。
IMS域控制设备， 用于在所述用户相关呼叫经由 IMS域进行处理时， 在 IMS触发在 线计费以进行集中的信用控制处理。如， IMS域中的 S-CSCF实体或应用服务器 AS , 特别 是在话音业务连续性业务中， 在将用户呼叫锚定到控制话音业务连续性业务的应用服务器 CCCF后， 触发在线计费的 S-CSCF实体或 CCCF实体。
该 IMS域控制设备可以如图 5A所示， 与 IMS域在线计费系统交互， 并通过 IMS域 在线计费系统和 CS预付费系统之间的实时交互实现与 CS预付费系统间的间接交互，实现 集中的信用控制处理； 或者， 该 IMS域控制设备也可以如图 5B、 5C所示， 分别与 IMS 域在线计费系统和 CS域预付费系统交互， 实现集中的信用控制处理。
IMS域在线计费系统和 /或 CS域预付费系统，用于根据所述 IMS域控制设备的信用控 制请求对用户进行信用控制处理。
在话音业务连续性业务中， 如果用户在 CS域签约在线计费 /预付费业务， 所述 CS域 还具有根据所述 CCCF实体的号码、 或者在主叫号码前插入的特殊前缀， 或 GSM业务控 制功能向 GSM业务交换功能下发的自由格式计费信息等特殊标识对 CS域针对所述用户产 生的话单进行免费处理的 CS域计费系统。
相应的， 一种包括信用控制功能的应用服务器的结构如图 6所示， 包括触发模块 600、 第一信用控制模块 601、 第二信用控制模块 602和选择模块 603。 其中， 触发模块 600在 接收会话请求后触发在线计费；第一信用模块 601在触发在线计费后与 IMS域在线计费系 统交互， 以进行信用控制处理； 第二信用控制模块 602在在触发计费控制后与 CS域预付 费系统交互， 以进行信用控制； 所述选择模块 603选择在 IMS域或 CS域进行信用控制。
参照图 5A和 5B所示实现与 CS预付费系统不同的交互方法， 可以看到其中第二信用 控制模块和选择模块实际上是可选的， 也就是说， 当只包含触发模块和第一信用控制模块 时， 该应用服务器中的触发模块根据用户签约数据触发在线计费， 利用其第一信用控制模 块直接通过标准的 Ro接口与 IMS域在线计费系统交互， 并如图 5A所示通过 IMS域在线 计费系统与 CS域预付费系统进行交互， 完成用户在 CS域和 IMS域的信用控制； 而当进 一步包括第二信用控制模块和选择模块时， 则如图 5B所示， 该应用服务器中的触发模块 根据用户签约数据触发在线计费，分别利用其第一信用控制模块通过标准的 Ro接口与 IMS 域在线计费系统交互， 利用其第二信用控制模块， 通过 CAP接口与 CS域预付费系统进行 交互， 并通过其选择模块根据用户当前呼叫所在的网络域或预设计费策略进行选择， 完成 用户在 CS域和 IMS域的信用控制。
从上述可知， 本发明通过在 IMS域触发在线计费业务进行集中的信用控制，提供了一 种在执行同时涉及 CS域和 IMS域的业务的过程中同时实现准确、完整的实时计费 /在线计 费控制， 从而提供采用实时 /在线计费控制模式的在线计费 /预付费业务的方法； 同时， 本 发明进一步完善了现有的话音通话连续性业务中静态锚定 IMS集中控制的跨域切换方案， 使得在应用该方案的情况下， 原来广为应用的在线计费 /預付费业务能继续提供， 而且避免 了为正确处理相关费用， 需要进行实时的 CS/IMS计费关联而导致的无法支持漫游或者实 施工程量巨大最终无法实际实施的问题； 进一步的， 本发明方案针对 CS/IMS分属不同网 络及用户在不同网络域进行通话存在资费差异等情况对在线计费业务控制能力进行了增 强； 通过本发明， 进一步促进了 CS、 WLAN及 IMS网络的综合应用。
显然， 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。 这样， 倘若对本发明的这些修改和变型属†本发明权利要求及其等同技术的范围之 内， 则本发明也意图包含这些改动和变型在内。

Claims

权利要求
1、 一种提供在线计费的方法， 该方法包括如下步骤：
在签约了同时涉及 CS域和 IMS域的业务以及需要在线计费的用户发起或接受 CS域 呼叫时， 不在 CS域针对该用户触发在线计费； 以及
在所述用户相关呼叫经由 IMS域进行处理时， 在 IMS域对所述用户进行信用控制处 理。
2、 如权利要求 1所述的方法， 其特征在于， 通过取消用户在 CS域上实现在线计费的 CAMEL签约数据， 实现不在 CS域对该用户触发在线计费； 或者， 通过修改智能业务平台 中的业务数据， 实现不在 CS域对该用户触发在线计费。
3、 如权利要求 2所述的方法， 其特征在于， 所述修改智能业务平台中的业务数据是 指修改 GSM业务控制功能实体和 /或业务数据点中业务逻辑判断的相关数据或设置， 当所 述用户的相关呼叫被触发到 GSM业务控制功能实体后，该 GSM业务控制功能实体进一步 根据呼叫相关信息判断需要执行所迷同时涉及 CS域和 IMS域的业务时， 不触发该用户在 CS域签约的在线计费业务逻辑。
4、 如权利要求 3 所述的方法， 其特征在于， 所述呼叫相关信息包括承载能力、 用户 当前位置和被叫号码中的一项或多项。
5、 如权利要求 1所述的方法， 其特征在于， 由控制所述同时涉及 CS域和 IMS域的 业务的应用服务器与 IMS域在线计费系统和 /或 CS域预付费系统交互，进行信用控制处理。
6、 如权利要求 5所述的方法， 其特征在于， 用户同时在 CS域和 IMS域签约在线计 费业务时， 控制所述同时涉及 CS域和 IMS域的业务的应用服务器才艮据用户签约数据， 直 接通过标准的 Ro接口与 IMS域在线计费系统交互， 并通过 IMS域在线计费系统与 CS域 预付费系统进行交互， 完成用户在 CS域和 IMS域的信用控制； 或者， 控制所述同时涉及 CS域和 IMS域的业务的应用服务器根据用户签约数据， 分别通过标准的 Ro接口与 IMS 域在线计费系统交互， 以及通过 CAP接口与 CS域预付费系统进行交互， 完成用户在 CS 域和 IMS域的信用控制。
7、 如权利要求 1 所述的方法， 其特征在于， 由分配给用户的服务呼叫会话控制功能 ( S-CSCF )实体与 IMS域在线计费系统和 /或 CS域预付费系统交互， 进行信用控制处理。
8、如权利要求 7所述的方法， 其特征在于， S- CSCF实体触发与 IMS域在线计费系统 的交互进行信用控制处理包括步骤：
服务呼叫会话控制功能根据用户签约数据将与用户相关的业务请求转发至 IMS 网关 功能；
IMS网关功能通过标准的 Ro接口与 IMS域在线计费系统交互进行信用控制处理。
9、 如权利要求 7所迷的方法， 其特征在于， S-CSCF实体触发与 CS域预付费系统的 交互进行信用控制处理包括步骤：
服务呼叫会话控制功能根据用户签约数据将与用户相关的业务请求转发至 MS 域业 务交换功能 IM-SSF;
IMS域业务交换功能 IM-SSF通过 CAP接口与 CS域预付费系统交互进行信用控制处 理。
10、 如权利要求 7所述的方法， 其特征在于， 用户同时在 CS域和 IMS域签约在线计 费业务时， 分配給用户的服务呼叫会话控制功能实体与 IMS域在线计费系统交互， 并通过 IMS域在线计费系统与 CS域预付费系统进行交互， 完成用户在 CS域和 IMS域的信用控 制； 或者
分配给用户的服务呼叫会话控制功能实体根据用户签约数据，分别与 IMS域在线计费 系统和 CS域领付费系统交互， 完成用户在 IMS域和 CS域的信用控制。
11、 如权利要求 6或 10所述的方法， 其特征在于， 用户当前在 CS域进行通话， 经由 CS域预付费系统实施用户在 CS域的信用控制； 或者， 用户当前在 IMS域进行通话， 经由 IMS域在线计费系统实施用户在 IMS域的信用控制； 或者， 经由 IMS域在线计费系统和 CS域预付费系统按一定比例分别实施用户在 IMS域和 CS域的信用控制。
12、 如权利要求 1所迷的方法， 其特征在于， 当用户只在 CS或 IMS其中一个域签约 在线计费业务时， 所迷信用控制处理是指： 仅对签约在线计费业务的域进行与在线计费相 关的信用控制。
13、 如权利要求 1所迷的方法， 其特征在于， 所述信用控制处理包括： 当检测到用户 在 CS域和 /或 IMS域的资费用尽后， 由 IMS中进行信用控制处理的网元对用户当前通话 进行相应的控制。
14、 如权利要求 13 所述的方法， 其特征在于， 所述对用户当前通话进行相应的控制 是指： IMS域中进行信用控制处理的网元终止用户当前通话。
15、 如权利要求 13所述的方法， 其特征在于， 当用户在 CS域和 IMS域中的一个网 络域的资费用尽而在另一个网络域尚有资费时，所述由 IMS中进行信用控制处理的网元对 用户当前通话进行相应的控制是指： 指示用户切换到该尚有资费的网络域进行通话。
16、 如权利要求 15所述的方法， 其特征在于， IMS 中进行信用控制处理的网元根据 用户当前进行通话的网络域， 通过电路域非结构化补充业务数据 ( USSD )消息或 IMS域 的会话初始协议通知（SIP Notify )消息指示用户切换至尚有资费的网络域继续当前通话。
17、 如权利要求 13 所述的方法， 其特征在于， 若用户在当前通话的网络域尚有资费 而在其他网络域资费用尽时，所述由 IMS中进行信用控制处理的网元对用户当前通话进行 相应的控制是指： IMS中进行信用控制处理的网元禁止用户当前通话在后续切换至资费用 尽的网络域。
18、 如权利要求 17所述的方法， 其特征在于， IMS中进行信用控制处理的网元通过 CCCF实体以特定原因值拒绝用户请求切换的新建会话建立请求； 或者，
IMS中进行信用控制处理的网元分别通过电路域 USSD或 IMS域的 SIP Notify指示用 户禁止切换， 并说明禁止切换的原因。
19、 如权利要求 1所迷的方法， 其特征在于， IMS中进行信用控制处理的网元在上报 的信用控制请求中， 携带所述同时涉及 CS域和 IMS域的业务指示、 当前呼叫方向和当前 用户进行通话的网络域中的一项或多项信息。
20、 如权利要求 19所述的方法， 其特征在于， IMS 中进行信用控制处理的网元根据 会话建立消息中主被叫信息确定所述当前呼叫方向； 或者， 根据会话建立消息中的 P-access-network-info 头域内容和 /或跨域路由选择功能确定的后续路由方向确定所述当前 用户进行通话的网络域。
21、 如权利要求 1所述的方法， 其特征在于， 所述同时涉及 CS域和 IMS域的业务为 话音通话连续性业务； 并且， 将所述用户发起或接受的 CS域呼叫路由到相应的呼叫连续 性控制功能（ CCCF )实体进行锚定时在 CS域不针对所述用户触发在线信用控制， 以及在 将所述用户相关呼叫锚定到所迷 CCCF实体后， 在 IMS域针对该用户进行信用控制处理。
22、 如权利要求 21 所迷的方法， 其特征在于， 在用户通话过程中发生跨域切换时， 由在 IMS中进行信用控制处理的网元上报更改信用控制请求， 通知 IMS域在线计费系统 和 /或 CS域预付费系统进行信用控制变更处理。
23、 如权利要求 22所述的方法， 其特征在于， 所述更改信用控制请求包括切换前用 户进行通话的网络域， 和 /或切换后用户进行通话的网络域。
24、 如权利要求 23所述的方法， 其特征在于， 所述在 IMS中进行信用控制处理的网 元根据本地记录确定用户切换前进行通话的网络域； 并根据请求切换的会话建立请求中 P-access-network-info头域内容确定用户切换后进行通话的网络域。
25、 如权利要求 21所述的方法， 其特征在于， 所述 IMS域在线计费系统和 /或 CS域 预付费系统进行信用控制时， 综合原有在线信用控制所需信息以及上报的话音通话连续性 业务相关信息计算用户通话费用。
26、 如权利要求 25 所述的方法， 其特征在于， 所述话音通话连续性业务相关信息包 括： 话音通话连续性业务指示、 当前呼叫方向、 当前用户进行通话的网络域、 切换前用户 进行通话的网络域和切换后用户进行通话的网络域中的一项或多项。
27、 如权利要求 21所迷的方法， 其特征在于， 在将所迷用户发起或接受的 CS域呼叫 路由到相应的呼叫连续性控制功能实体进行锚定的路由控制过程中控制在 CS产生的话单 中携带特殊标识， 该标识可以是所述 CCCF实体具有的特殊的号码， 或者在主叫号码前插 入的特殊前缀， 或者 GSM业务控制功能向 GSM业务交换功能下发的自由格式计费信息， CS域的网 设备根据该特殊标识对 CS.产生的话单进行免费处理。
28、 一种信用控制设备， 其特征在于： 包括：
触发模块： 用于触发在线计费的模块；
第一信用控制模块： 用于在触发在线计费后， 与 IMS域在线计费系统交互进行信用控 制处理的模块。
29、 如权利要求 28所述的设备， 其特征在于， 还包括： , ' 选择模块： 用于在触发在线计费后， 选择进行在 IMS域或 CS域的信用控制的模块； 第二信用控制模块： 用于在触发在线信用控制后， 与 CS域预付费系统交互进行信用 控制处理的模块。
30、 如权利要求 28所述的设备， 其特征在于， 所述设备为控制同时涉及 CS域和 IMS 域的业务的应用服务器， .该应用服务器中的触发模块根据用户签约数据触发在线计费， 利 用其第一信用控制模块直接通过标准的 Ro接口与 IMS域在线计费系统交互， 和 /或， 通过 IMS域在线计费系统与 CS域预付费系统进行交互， 完成用户在 CS域和 IMS域的信用控 制。
31、 如权利要求 29所述的设备， 其特征在于， 所述设备为控制同时涉及 CS域和 IMS 域的业务的应用服务器， 该应用服务器中的触发模块根据用户签約数据触发在线计费， 分 别利用其第一信用控制模块通过标准的 Ro接口与 IMS域在线计费系统交互， 和 /或， 利用 其第二信用控制模块， 通过 CAP接口与 CS域预付费系统进行交互， 并通过其选择模块根 据用户当前呼叫所在的网络域或预设计费策略进行选择， 完成用户在 CS域和 IMS域的信 用控制。
32、 一种通信系统， 其特征在于， 包括：
在同时涉及电路 ( CS )域和 IP多媒体子系统（ IMS )域的业务以及在线计费业务的签 约用户发起或接受电路（ CS )域的呼叫时， 不在 CS域触发在线计费的 CS域控制设备； 在呼叫经由 IMS域进行处理时， 在 IMS域触发在线计费以进行信用控制处理的 IMS 域控制设备；
根据所述 IMS域控制设备的信用控制请求对用户进行信用控制处理的 IMS域在线计 费系统和 /或 CS域预付费系统。
33、 如权利要求 32所述的通信系统， 其特征在于， 所述 CS域控制设备为用户归属 HLR, 当发现用户同时签约了所述同时涉及 CS域和 IMS域的业务时， 在向用户拜访移动 交换中心以及关口移动交换中心提供的用户业务签约数据中取消用户在 CS域上实现在线 计费的 CAMEL签约数据， 以实现不在 CS域针对该用户触发在线计费； 或者，
所述 CS域控制设备为原来针对该用户进行在线计费业务逻辑控制的 GSM业务控制功 能，通过修改智能业务平台中的业务数据， 当收到所述用户相关呼叫触发消息后， 该 GSM 业务控制功能实体进一步根据呼叫相关信息判断需要执行所述同时涉及 CS域和 IMS域的 业务时， 不触发该用户在 CS域签约的在线计费业务控制逻辑。
34、 如权利要求 32所述的通信系统， 其特征在于， 所述 IMS域控制设备为控制所述 同时涉及 CS域和 IMS域的业务的应用服务器， 该应用服务器根据用户签约数据， 直接通 过标准的 Ro接口与 IMS域在线计费系统交互，和 /或， 通过 IMS域在线计费系统与 CS域 预付费系统进行交互， 完成用户在 CS域和 IMS域的信用控制； 或者，
该应用服务器根据用户签约数据， 分别通过标准的 Ro接口与 IMS域在线计费系统交 互， 和 /或， 作为 IMS域业务交换功能 IM-SSF, 通过 CAP接口与 CS域预付费系统进行交 互， 完成用户在 CS域和 IMS域的信用控制。
35、 如权利要求 32所述的通信系统， 其特征在于， 所述 IMS域控制设备为用户分配 的服务呼叫会话控制功能 S-CSCF , 该 S-CSCF根据用户签约数据， 通过 IMS网关功能与 IMS域在线计费系统交互，和 /或，通过 IMS域在线计费系统与 CS域预付费系统进行交互， 完成用户在 CS域和 IMS域的信用控制； 或者，
该 S-CSCF根据用户签约数据，分别通过 IMS网关功能与 IMS域在线计费系统， 以及 通过 IMS域业务交换功能与 CS域预付费系统交互， 完成用户在 IMS域和 CS域的信用控 制。
36、 如权利要求 32所迷的通信系统， 所述同时涉及 CS域和 IMS域的业务为话音通 话连续性业务， 并且， 在用户通话过程中发生跨域切换时， 所述 IMS域控制设备通知所述 IMS域在线计费系统和 /或 CS预付费系统进行信用控制变更处理。
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