WO2011091683A1 - 增强的策略和计费控制的方法及系统、pcc系统 - Google Patents

增强的策略和计费控制的方法及系统、pcc系统 Download PDF

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Publication number
WO2011091683A1
WO2011091683A1 PCT/CN2010/079119 CN2010079119W WO2011091683A1 WO 2011091683 A1 WO2011091683 A1 WO 2011091683A1 CN 2010079119 W CN2010079119 W CN 2010079119W WO 2011091683 A1 WO2011091683 A1 WO 2011091683A1
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WIPO (PCT)
Prior art keywords
charging
pcrf
service
tdef
rule
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PCT/CN2010/079119
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English (en)
French (fr)
Inventor
周晓云
孙闵
郭文洁
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中兴通讯股份有限公司
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Publication of WO2011091683A1 publication Critical patent/WO2011091683A1/zh

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Classifications

    • 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
    • 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
    • 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
    • H04L12/1403—Architecture for metering, charging or billing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/02—Capturing of monitoring data
    • H04L43/028—Capturing of monitoring data by filtering
    • 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
    • H04M15/66—Policy and charging system

Definitions

  • the present invention relates to enhanced techniques for Policy and Charging Control (PCC), and more particularly to an enhanced method and system for policy and charging control, and a PCC system.
  • PCC Policy and Charging Control
  • the PCC system of the 3rd Generation Partnership Project (3GPP) is a functional framework that can be applied to various access technologies, for example, it can be applied to the land of the Universal Mobile Telecommunications System (UMTS).
  • UMTS Universal Mobile Telecommunications System
  • GSM Global System for Mobile Communication
  • GSM Enhanced Data Rates for Global Evolution
  • WLAN Wireless Local Area Network
  • I-WLAN Interworking Wireless Local Area Network
  • EPS Evolved Packet System
  • FIG. 1 is a schematic diagram of a related technology of a Rel-8 PCC non-roaming architecture.
  • a PCC system includes a user subscription database (SPR, Subscription Profile Repository), an application function entity (AF, Application Function), and policy and charging.
  • SPR user subscription database
  • AF Application Function
  • Policy and charging policy and charging.
  • PCRF Policy and Charging Rule Function
  • BBERF Bearer Binding and Event Reporting Function
  • PCEF Policy and Control Enforcement Function
  • the charging system includes a line charging system (OCS, Online Charging) System ) and offline billing system ( OFCS , Offline Charging System ), PCEF is connected to OCS through Gy interface, PCEF is connected to OFCS through Gz interface.
  • OCS Online Charging
  • OFCS Offline Charging System
  • the AF is used to provide access points for service applications, and the network resources used by these service applications require dynamic policy and charging control.
  • the AF passes the relevant service information to the PCRF. If the service information is consistent with the PCRF policy, the PCRF accepts the negotiation; otherwise, the PCRF rejects the negotiation and also gives the business parameters acceptable to the PCRF in the feedback. The AF can then return these parameters to the user equipment (UE, User Equipment).
  • the interface between AF and PCRF is the Rx interface.
  • the PCRF is the core of the PCC and is responsible for policy decision making and billing rules.
  • the PCRF provides network control rules based on service data flows, including traffic data flow detection, Gating Control, Quality of Service (QoS) control, and data flow based charging rules.
  • the PCRF sends its policy and charging rules to the PCEF for execution. At the same time, the PCRF also needs to ensure that these rules are consistent with the user's subscription information.
  • the basis for formulating policies and charging rules by the PCRF includes: obtaining information related to the service from the AF; obtaining subscription information with the user policy charging control from the SPR; and acquiring information about the network related to the bearer from the PCEF.
  • the PCEF is usually located in the gateway (GW, Gate-Way), and performs the policy and charging rules established by the PCRF on the bearer plane.
  • the PCEF detects the service data flow according to the service data flow filter in the rule sent by the PCRF, and then executes the policy and charging rules formulated by the PCRF for these service data flows.
  • the PCEF performs QoS authorization according to the rules sent by the PCRF, and performs gate control according to the execution of the AF.
  • the charging rule sent by the PCRF the PCEF performs a corresponding service data flow charging operation, and the charging can be either online charging or offline charging. In the case of online charging, the PCEF needs to conduct credit management with the OCS.
  • the interface between the PCEF and the PCRF is a Gx interface
  • the interface between the OCE and the OCS is a Gy interface
  • the interface between the OFCS and the OFCS is a Gz interface.
  • PCEF They are generally located on the gateway of the network, such as the GPRS Gateway Support Node (GGSN) in GPRS and the Packet Data Gateway (PDG) in I-WLAN.
  • GGSN GPRS Gateway Support Node
  • PGW Packet Data Gateway
  • the BBERF is used for bearer binding, authentication of upstream bearer bindings, and event reporting.
  • the BBERF Located at the S-GW, when the UE accesses through the trusted non-3GPP access system, the BBERF is located in the trusted non-3GPP access gateway, and when the UE accesses through the untrusted non-3GPP access system, the BBERF is located in the evolved packet data gateway.
  • ePDG Evolved Packet Data Gateway. At this point, PCEF no longer performs the 7-load binding function.
  • the SPR stores user policy charging control subscription information related to policy and charging control and charging.
  • the interface between SPR and PCRF is the Sp interface.
  • OCS and PCEF are used to control and manage user credit under online charging mode.
  • the OFCS and the PCEF start the charging operation in the offline charging mode.
  • the PCC system implements policy charging control for the IP-CAN session established by the UE to access the Packet Data Network (PDN) through the above functional entities.
  • PDN Packet Data Network
  • the PCC system makes it possible to charge users at multiple levels and multiple latitudes.
  • the PCEF interacts with the OCS to perform credit control.
  • the PCEF provides the bearer layer charging information to the charging system, and uses the Access-Network-Charging-Identifier (also referred to as the bearer layer charging identifier) for identification.
  • the application server also provides the application layer charging information to the charging system, and uses the application function charging identifier (AF-Charging-Identifier) to identify the charging identifier, which is generated by the AF and sent to the relevant application server.
  • the AF itself can also provide application layer charging information to the billing system, which is also identified by AF-Charging-Identifier.
  • the charging information generated by the AF or the application server is application layer charging information.
  • the access network charging identifier is reported to the AF and other application servers through the PCRF.
  • the charging information of the application layer includes the charging identifier of the bearer layer.
  • the bearer layer charging system generated by the PCEF includes an application function charging identifier. In this way, the charging system can associate the two levels of charging information by the two charging identifiers, thereby implementing multi-level and multi-dimensional charging for the user access service.
  • Session-based services such as the IP Multimedia Subsystem (IMS) can use the initial session protocol (SIP, SIP Session Initiation Protocol) to conduct service layer negotiation of sessions (eg, The codec mode, the media type, the required bandwidth, etc.), the P-CSCF (ie, the AF in the PCC system) notifies the PCRF of the negotiated service information, and performs QoS authorization by the PCRF.
  • IMS IP Multimedia Subsystem
  • the main object of the present invention is to provide an enhanced policy and charging control method and system, and a PCC system, which can implement policy and charging control for non-session services, and can specifically perform four layers of services.
  • the above charging operation is to provide an enhanced policy and charging control method and system, and a PCC system, which can implement policy and charging control for non-session services, and can specifically perform four layers of services.
  • An enhanced policy and charging control method in which a service detection execution function entity TDEF is set in a policy and charging control PCC system; the method includes:
  • the TDEF performs charging control according to a service execution rule formulated by the policy and charging rule function entity PCRF.
  • the method further includes:
  • the PCRF formulates a PCC rule, determining the number of services matching the PCC rule After performing flow control of four layers or more according to the flow, the business execution rule is formulated and sent to the TDEF;
  • the PCRF When the PCRF sends a PCC rule to the policy and control execution function entity PCEF, it indicates that the service data flow matching the PCC rule is controlled by four or more layers of policies and charging; the TDEF performs four or more layers on the service data flow. Billing control, and provide corresponding billing information to the billing system.
  • the method further includes:
  • the TDEF When the TDEF detects a service that has not been reported to the PCRF in the service data flow according to the service detection rule, the TDEF sends the service that has not been reported to the PCRF to the PCRF;
  • the PCRF formulates a PCC rule for the service that has not been reported to the PCRF, and determines to perform four-layer policy and accounting control on the service data flow that matches the PCC rule, and then formulates a service execution rule and sends the rule. Giving the TDEF;
  • the TDEF requests a new credit from the online charging system and/or returns the remaining credits, and performs more than four layers of online charging for the TDEF to detect the service.
  • the method further includes:
  • the TDEF allocates an application charging identifier to the service that has not been previously reported to the PCRF according to the service detection rule, when detecting a service that has not been reported to the PCRF in the service data flow. And sent to the PCRF.
  • the method further includes:
  • the PCRF When receiving the service that has not been reported to the PCRF by the TDEF, the PCRF allocates an application charging identifier to the service that has not been reported to the PCRF, and sends the application to the TDEF.
  • the method further includes:
  • the PCEF sends an access network charging identifier, the application charging identifier, and bearer charging information to the offline charging system;
  • the offline charging system saves the access network charging identifier, the application charging identifier, and the bearer charging information, and implements offline charging of the service.
  • the method further includes:
  • the TDEF sends an access network charging identifier, the application charging identifier, and application charging information to an offline charging system;
  • the offline charging system saves the access network charging identifier, the application charging identifier, and the application charging information, and implements offline charging of the service.
  • the offline charging system associates the bearer charging information with the application charging information according to the access network charging identifier and the application charging identifier.
  • the charging system includes an online charging system OCS and an offline charging system OFCS, and the TDEF is connected to the OCS through a Gy interface, and the TDEF is connected to the OFCS through a Gz interface.
  • OCS online charging system
  • OFCS offline charging system
  • a PCC system comprising a user subscription database SPR, AF, PCRF, BBERF, PCEF and a charging system, wherein the SPR, the AF, the BBERF and the PCEF are respectively connected to the PCRF, and the PCEF is connected to The charging system; the PCC system further includes a TDEF, which is respectively connected to the PCRF and the charging system; and the TDEF performs charging control according to a service execution rule formulated by a policy and a charging rule function entity PCRF.
  • the TDEF and the PCRF are connected through an Sx interface.
  • the charging system includes an online charging system OCS and an offline charging system OFCS, and the TDEF and the OCS are connected through a Gy interface, the TDEF and the OFCS Connected through the Gz interface.
  • OCS online charging system
  • OFCS offline charging system
  • An enhanced policy and charging control system comprising a setting unit, a developing unit and an executing unit;
  • a unit is configured to formulate PCC rules, service detection rules, and service execution rules; and an execution unit, configured to perform charging control according to a service execution rule formulated by the PCRF.
  • the system further includes a determining unit, a first sending unit, a second sending unit, and a charging and providing unit, where:
  • a determining unit configured to: after determining, by the formulating unit, a PCC rule, determining, by performing a policy of four or more policies and charging on the service data flow that matches the PCC rule, triggering the formulating unit to further formulate a service execution rule;
  • a first sending unit configured to send the service detection rule or/and a service execution rule to the TDEF
  • a second sending unit configured to send a PCC rule to the PCEF, and instruct to perform four or more layers of policy and charging control on the service data flow matched by the PCC rule;
  • the charging and providing unit is configured to perform charging control of more than four layers on the service data flow, and provide corresponding charging information to the charging system.
  • the system further comprises a detecting unit and an upper unit, wherein:
  • a detecting unit configured to detect a service data flow according to the service detection rule, and trigger an upper unit when detecting a service that has not been reported to the PCRF, and the determining unit is the unfiltered PCRF
  • the reported service formulates a PCC rule
  • the determining unit further determines, when performing control over four layers of policy and charging on the service data flow that matches the PCC rule, the formulating unit formulates a service execution rule, and
  • the first transmitting unit sends the TDEF.
  • the system further comprises:
  • a first allocation unit configured to send, to the detecting unit, a service charging identifier that is not previously reported to the PCRF; the reporting unit further reports the application charging identifier to the PCRF.
  • the system further comprises:
  • a second allocation unit configured to allocate an application charging identifier to the service that has not been reported to the PCRF by the TDEF, and is sent by the first sending unit to the TDEF.
  • the second sending unit sends the application charging identifier corresponding to the PCC rule to the PCEF;
  • the PCEF provides an access network charging identifier, the application charging identifier, and bearer charging information to an offline charging system; the offline charging system saves the access network charging identifier, the application charging identifier And carrying billing information to implement offline charging of services.
  • the system further comprises:
  • the first sending unit sends the application charging identifier corresponding to the service execution rule to the TDEF;
  • the TDEF sends an access network charging identifier, the application charging identifier, and application charging information to an offline charging system; the offline charging system saves the access network charging identifier, the application meter The fee identification and the application charging information enable offline charging of the service.
  • the offline charging system associates the bearer charging information with the application charging information according to the access network charging identifier and the application charging identifier.
  • a service detection function (TDF, Traffic Detection Function) is added in the current PCC system to detect information of four or more layers of the service data stream, so that the service information provided to the PCRF is richer, which is beneficial to the PCRF policy.
  • the decision-making can realize the charging operation for more than four layers of the service, thereby realizing the multi-level and multi-latitude charging control of the business data.
  • FIG. 1 is a schematic diagram of a related art Rel-8 PCC non-roaming architecture
  • FIG. 2 is a schematic structural diagram of a PCC system according to the present invention.
  • FIG. 3 is a flowchart of Embodiment 1 of an enhanced policy and charging control method of the present invention
  • FIG. 4 is a flowchart of Embodiment 2 of an enhanced policy and charging control method of the present invention
  • FIG. 5 is an enhanced strategy of the present invention
  • FIG. 6 is a schematic structural diagram of a system for enhanced policy and charging control according to the present invention
  • FIG. 7 is a schematic diagram of a system for enhanced policy and charging control according to the present invention
  • FIG. 8 is a schematic diagram of still another structural structure of the enhanced policy and charging control system of the present invention.
  • the basic idea of the present invention is to: add a traffic detection function (TDF) in the current PCC system, and implement detection of information of four or more layers of the service data stream, so that providing service information to the PCRF will be more abundant, which is beneficial to the present invention.
  • the PCRF performs policy decision-making, and can implement charging operations for more than four layers of services, thereby implementing multi-level and multi-latitude charging control for service data.
  • FIG. 2 is a schematic structural diagram of a PCC system according to the present invention.
  • the PCC system of the present invention is formed by adding TDEF to the PCC system shown in FIG. 1.
  • the TDEF is set between the charging system and the PCRF.
  • the TDEF is connected to the PCRF through the Sx interface, and is connected to the OCS through the Gy interface, and is connected to the OFCS through the Gz interface.
  • the main features of TDEF include:
  • FIG. 3 is a flowchart of Embodiment 1 of an enhanced policy and charging control method of the present invention. As shown in FIG. 3, this embodiment describes an IP-CAN session establishment process, and the specific steps are as follows:
  • Step S301 The gateway that the BBERF resides receives the IP-CAN session request message, and the message carries the user identifier, the PDN identifier, and the like.
  • Step S302 The BBERF sends a gateway control session establishment request message to the PCRF, where the message carries information such as a user identifier and a PDN identifier. This message is used to request the establishment of a gateway control session.
  • Step S303 If the PCRF does not have the user-related subscription information, the PCRF sends a subscription document request message to the SPR, where the message carries the user identifier and the PDN identifier. If the user-related subscription information is stored in the PCRF, step S305 is directly executed, and a corresponding policy is formulated according to the subscription information.
  • Step S304 The SPR returns the subscription information of the user according to the user identifier and the PDN identifier, where the service includes the service detection and the service that needs to be detected.
  • Step S305 The PCRF formulates a default policy according to the subscription information returned by the SPR, including a PCC rule and a corresponding QoS rule. If service detection is required, the PCRF formulates service detection rules based on the services to be detected. Service detection rules usually include more than four layers of filters. If the issued PCC rule further needs to perform more than four layers of policy and charging control, the PCRF also formulates a corresponding rule for performing four layers of policy and charging control on the service data flow (in the present invention, the rule) Called the business execution rule). Optionally, the PCRF also creates an event trigger.
  • Step S306 the PCRF returns a gateway control session establishment confirmation message to the BBERF, in the message.
  • BBERF installs QoS rules and event triggers.
  • Step S307 The gateway where the BBERF resides sends an IP-CAN session request message to the gateway where the PCEF resides, and the message carries information such as a user identifier and a PDN identifier.
  • step S307 can be performed simultaneously with step S302.
  • Step S308 the gateway where the PCEF resides allocates an IP address and an access network charging identifier for the IP-CAN session that the UE requests to establish.
  • the PCEF sends an IP-CAN session establishment indication message to the PCRF, where the message carries information such as a user identifier, a PDN identifier, an IP Address, and an access network charging identifier. This message is used to request a Gx session.
  • Step S309 the PCRF associates the request to establish the gateway control session with the Gx session requested by the step S308 according to the user identifier and the PDN identifier.
  • the PCRF returns the PCC rules, event triggers, and the address of the TDEF selected for the IP-CAN session to the PCEF in step S304.
  • the PCRF will also send a policy and charging control indication to the PCEF whether more than four layers of filtering are required. If necessary, the PCEF will forward the service data stream matching the PCC rule to the TDEF.
  • Step S310 if online charging control needs to be performed, and at least one PCC rule is activated, the PCEF activates the online charging session and provides related input information for OCS decision, and the input information includes information such as a user identifier.
  • This online charging session is used for online charging of the bearer layer (below four layers).
  • Step S311 the OCS provides possible credit information to the PCEF. OCS also provides a re-authorization trigger for each credit.
  • Step S312 if at least one PCC rule is successfully activated and online charging is applied and the credit is not rejected by the OCS, the PCEF resident gateway returns an IP-CAN session response message to the gateway hosted by the BBERF, carrying the IP-CAN session. IP Address.
  • Step S313, the gateway where the BBERF resides returns an IP-CAN session response message, and carries the IP address of the IP-CAN session.
  • the PCRF also provides business detection rules and/or business execution rules to the TDEF.
  • the request message is used to establish a service detection session.
  • Step S315 the PCEF returns a confirmation message to the PCRF after installing the service detection rule and the service detection and execution rule.
  • Step S316 if online charging control needs to be performed, and at least one service detection and execution rule is activated, the TDEF activates the online charging session and provides relevant input information for the OCS decision, and the input information includes information such as the user identifier.
  • This online charging session is used for online charging at the application layer (layer 7).
  • Step S317 the OCS provides possible credit information to the TDEF.
  • OCS also provides a re-authorization trigger for each credit.
  • the OCS associates the credit control session established in step S310 with the credit control session established in step S316 based on the user identification.
  • step S314 can be executed after step S305.
  • Step S316 can be executed after step S314.
  • the UE establishes an IP-CAN session, and the PCRF associates a gateway control session, a Gx session, and a service detection session for policy and charging control of the IP-CAN session.
  • the credit control session established between PCEF and TDEF and OCS respectively, and associated with the session implemented by OCS, so that for those non-session type services, OCS can perform the charging association analysis between the bearer layer and the application layer.
  • Step S401 The TDEF detects the flow of the service data flowing according to the service detection rule delivered by the PCRF, and detects the service that has not been reported to the PCRF before.
  • Step S402 The TDEF reports the detected service to the PCRF.
  • the TDEF can report to the PCRF through the identifier of the corresponding service detection rule or the pre-configured identifier of the service between the PCRF and the TDEF.
  • the TDEF also allocates a charging identifier for the service to identify the charging information of more than four layers.
  • the charging identifier is called an application charging identifier, and the charging information of four layers or more is called application charging. Information), and sent to the PCRF.
  • Step S403 After the PCRF saves the information on the TDEF, the PCRF returns an acknowledgement message to the TDEF.
  • the PCRF policy includes PCC rules and corresponding QoS rules.
  • the PCC rule includes a four-layer filter.
  • the PCEF detects the service data flow according to the four-layer filter, and performs policy and charging control. If the issued PCC rules need to further implement the policy and charging control of more than four layers, the PCRF will also formulate corresponding service execution rules.
  • the service execution rule includes more than four layers of filters, so that TDEF can detect the service data flow according to the four or more filters and perform policy and charging control.
  • the PCRF can also create event triggers for event subscriptions to BBERF, PCEF or TDEF.
  • Step S405 The PCRF sends a gateway control and QoS rule providing message to the BBERF, carries the QoS rule, and an event trigger.
  • Step S406 BBERF installs QoS rules and event triggers.
  • the gateway where the BBERF is located performs QoS control according to the QoS rules to establish, modify, or terminate the bearer.
  • Step S407 The BBERF returns an acknowledgement message to the PCRF.
  • Step S408 the PCRF sends a policy and charging rule providing message to the PCEF, carrying the PCC rule and the event trigger.
  • the PCRF will also send a policy and charging control indication to the PCEF whether more than four layers of filtering are required. If necessary, the PCEF will forward the service data stream matching the PCC rule to the TDEF. PCRF will report the application reported by TDEF The billing ID is sent to the PCEF.
  • Step S409 the PCEF installs a PCC rule and an event trigger.
  • the PCEF will forward the service data flow detected by the PCC rule to the TDEF selected by the PCRF for the IP-CAN session during the IP-CAN session establishment process according to the policy and charging control indication filtered by the four layers.
  • Step S410 if online charging is performed, the PCEF may request a new credit to the OCS for the new Charging Keys and/or return the remaining credits of the Charging Key that are no longer activated.
  • Step S411 the OCS provides a credit and/or confirmation credit report to the PCEF.
  • Step S412 the PCEF returns an acknowledgement message to the PCRF.
  • Step S413 The PCRF sends a service execution rule providing message to the TDEF, and provides a service execution rule and an event trigger.
  • Step S414 the TDEF installs a service execution rule and an event trigger.
  • Step S415 if online charging is performed, the TDEF requests the new credit for the new Charging Keys from the OCS and/or returns the remaining credits of the Charging Keys that are no longer activated; in step S416, the OCS provides the credit to the TDEF. / or confirm the credit report;
  • Step S417 the TDEF returns an acknowledgement message to the PCRF.
  • the PCEF and the TDEF respectively detect the online charging of the non-session type service (the layer below four layers) and the application layer (four layers or more) through the credit control session established with the OCS. And the TDEF sends the application charging identifier to the PCEF through the PCRF to implement charging for the service.
  • the TDEF allocates an application charging identifier for each newly detected service.
  • it can also be implemented by other methods:
  • the PCRF After receiving the report of the detected new service reported by the TDEF, the PCRF allocates an application charging identifier to the service and sends it to the TDEF. At the same time, the PCRF also sends the application charging identifier to the PCEF.
  • Embodiment 3 After receiving the report of the detected new service reported by the TDEF, the PCRF allocates an application charging identifier to the service and sends it to the TDEF. At the same time, the PCRF also sends the application charging identifier to the PCEF.
  • Embodiment 3 is a flowchart of Embodiment 3 of an enhanced policy and charging control method of the present invention. As shown in FIG. 5, this embodiment describes that multi-layer offline charging is implemented by PCEF and TDEF based on Embodiment 1 and Embodiment 2. The specific steps are as follows:
  • Step S501 The gateway where the PCEF resides receives the charging information that needs to be sent to the OFCS.
  • Step S502 The gateway where the PCEF resides reports information to the OFCS, and carries the access network charging identifier, the application charging identifier, and the bearer charging information.
  • Step S503 The OFCS saves the charging information.
  • Step S504 the OFCS returns an acknowledgement message.
  • Step S505 The gateway where the TDEF resides receives the trigger information that needs to be sent to the OFCS.
  • Step S507 the OFCS saves the charging information.
  • Step S508 the OFCS returns an acknowledgement message.
  • Step S509 The OFCS associates the charging information stored in step S507 and step S508 according to the access network charging identifier and the application charging identifier, and implements a bearer layer (below four layers) and an application layer (four layers) for the non-session type service. Offline charging for the above).
  • FIG. 6 is a schematic structural diagram of a system for enhanced policy and charging control according to the present invention.
  • the system for enhanced policy and charging control of the present invention includes a setting unit 601, a formulating unit 602, and an executing unit 603. a determining unit 604, a first sending unit 605, a second sending unit 606, and a billing and providing unit 607, wherein:
  • Setting unit 601 configured to set TDEF in the PCC system
  • the unit 602 is configured to formulate a PCC rule, a service detection rule, and a service execution rule.
  • the executing unit 603 is configured to perform charging control according to the service execution rule formulated by the PCRF.
  • the enhanced policy and charging control system of the present invention further includes a determining unit 604, a first sending unit 605, a second sending unit 606, and a charging and providing unit 607, where: a determining unit 604, configured to determine, when the determining unit 602 formulates a PCC rule,
  • the triggering and formulating unit 602 further formulates a service execution rule
  • a first sending unit 605, configured to send the service detection rule or/and a service execution rule to the TDEF;
  • a second sending unit 606 configured to send a PCC rule to the PCEF, and instruct to perform four-layer policy and charging control on the service data flow that matches the PCC rule;
  • the charging and providing unit 607 is configured to perform charging control of more than four layers on the service data flow, and provide corresponding charging information to the charging system.
  • the determining unit 604, the first transmitting unit 605, the second transmitting unit 606, and the billing and providing unit 607 are provided for the technical solution of the system for optimizing the enhanced policy and charging control of the present invention.
  • FIG. 7 is a schematic diagram of a second component structure of a system for enhanced policy and charging control according to the present invention. As shown in FIG. 7, based on the enhanced policy and charging control system shown in FIG. 6, the present invention is enhanced.
  • the system of the policy and the charging control further includes a detecting unit 608 and a reporting unit 609, wherein the detecting unit 608 is configured to detect the service data flow according to the service detection rule, and detect that the PCRF has not been reported before. When the business is over, trigger the upper unit 609;
  • the determining unit 602 formulates a PCC rule for the service that has not been reported to the PCRF, and the determining unit 604 further determines, when performing the control of the policy and the charging of the service data flow that matches the PCC rule, the determining unit 602 A business execution rule is formulated and sent by the first transmitting unit 605 to the TDEF.
  • the detecting unit 608 and the reporting unit 609 are for optimizing the present It is set up to invent the technical solution of the enhanced policy and charging control system.
  • FIG. 8 is still another schematic structural diagram of a system for enhanced policy and charging control according to the present invention. As shown in FIG. 8, based on the enhanced policy and charging control system shown in FIG. 7, the present invention is enhanced.
  • the system of policy and billing control also includes:
  • a first allocating unit 610 configured to detect, by the detecting unit, a service charging identifier that has not been previously reported to the PCRF; the upper >3 ⁇ 4 unit 609 further uploads the application charging identifier to the PCRF.
  • system further includes:
  • the second allocating unit 611 is configured to allocate an application charging identifier to the service that has not been reported to the PCRF by the TDEF, and is sent by the first sending unit 605 to the TDEF.
  • the second sending unit 606 sends the application charging identifier corresponding to the PCC rule to the PCEF;
  • the PCEF provides an access network charging identifier, the application charging identifier, and bearer charging information to an offline charging system; the offline charging system saves the access network charging identifier, the application charging identifier And carrying billing information to implement offline charging of services.
  • the first sending unit 605 further sends the application charging identifier corresponding to the service execution rule to the TDEF; the TDEF reports the access network charging identifier, the application charging identifier, and the application charging to the offline charging system.
  • the offline charging system saves the access network charging identifier, the application charging identifier, and the application charging information, and implements offline charging of the service.
  • the offline charging system associates the bearer charging information with the application charging information according to the access network charging identifier and the application charging identifier.
  • the enhanced policy and charging control system illustrated in Figures 6, 7, and 8 is designed to implement the aforementioned enhanced policy and charging control methods, Figures 6 and 7 And the functions of the processing units in the enhanced policy and charging control system shown in FIG. It is understood from the description of the method shown in FIG. 3 to FIG. 5 that the functions of the processing units can be implemented by a program running on the processor or by a specific logic circuit.

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Description

增强的策略和计费控制的方法及系统、 PCC系统 技术领域
本发明涉及增强的策略和计费控制（ PCC, Policy and Charging Control ) 的技术， 尤其涉及一种增强的策略和计费控制的方法及系统， 以及 PCC系 统。 背景技术
第三代合作伙伴计划 ( 3GPP, 3rd Generation Partnership Project )的 PCC 系统是能够应用于多种接入技术的功能框架， 例如， 其可以应用于通用移 动通信系统 ( UMTS, Universal Mobile Telecommunications System )的陆上 无线接入网 ( UTRAN, UMTS Terrestrial Radio Access Network ), 全球移动 通信系统（ GSM, Global system for Mobile Communication ) /GSM数据增强 演进（ EDGE, Enhanced Data rates for Global Evolution )无线接入网（ WLAN, Wireless Local Area Network ), 互通无线局域网 （ I-WLAN ) 以及演进的分 组系统（ EPS , Evolved Packet System )等。
图 1为相关技术的 Rel-8 PCC非漫游架构示意图， 如图 1所示， PCC 系统中包括用户签约数据库 （SPR, Subscription Profile Repository ), 应用 功能实体（AF, Application Function ), 策略与计费规则功能实体（PCRF, Policy and Charging Rule Function )、承载绑定和事件报告功能实体（ BBERF, Bearer Binding and Event Reporting Function )、 策格和控制执行功能实体 ( PCEF , Policy and Control Enforcement Function )和计费系统， 其中， SPR 通过 Sp接口与 PCRF连接， AF通过 Rx接口与 PCRF连接， BBERF通过 Gxx接口与 PCRF连接， PCEF通过 Gx接口与 PCRF连接； 计费系统包括 线计费系统（ OCS , Online Charging System )和离线计费系统（ OFCS , Offline Charging System ), PCEF通过 Gy接口连接于 OCS , PCEF通过 Gz接口连 接于 OFCS。 以下参照图 1对 PCC系统中的各个逻辑功能实体及其接口功 能进行描述：
AF用于提供业务应用的接入点， 这些业务应用所使用的网络资源需要 进行动态的策略和计费控制。 在业务面进行参数协商时， AF将相关业务信 息传递给 PCRF。 如果这些业务信息与 PCRF的策略相一致， 则 PCRF接受 该协商； 否则， PCRF拒绝该协商， 并在反馈中同时给出 PCRF可接受的业 务参数。 随后， AF可将这些参数返回给用户设备 ( UE, User Equipment )。 其中， AF和 PCRF之间的接口是 Rx接口。
PCRF是 PCC的核心， 负责策略决策和计费规则的制定。 PCRF提供了 基于业务数据流的网络控制规则， 这些网络控制包括业务数据流的检测、 门控（ Gating Control )、 服务质量（QoS , Quality of Service )控制以及基于 数据流的计费规则等。 PCRF将其制定的策略和计费规则发送给 PCEF执行， 同时， PCRF还需要保证这些规则和用户的签约信息一致。 PCRF制定策略 和计费规则的依据包括： 从 AF获取与业务相关的信息； 从 SPR获取与用 户策略计费控制签约信息； 从 PCEF获取与承载相关网络的信息。
PCEF通常位于网关 （GW, Gate-Way ) 内， 在承载面执行 PCRF所制 定的策略和计费规则。 PCEF按照 PCRF所发送的规则中的业务数据流过滤 器对业务数据流进行检测， 进而对这些业务数据流执行 PCRF 所制定的策 略和计费规则。在承载建立时， PCEF按照 PCRF发送的规则进行 QoS授权， 并根据 AF的执行进行门控控制。 根据 PCRF发送的计费规则， PCEF执行 相应的业务数据流计费操作， 计费既可以是在线计费， 也可以是离线计费。 如果是在线计费， 则 PCEF需要和 OCS—起进行信用管理。 离线计费时， PCEF和 OFCS之间交换相关计费信息。 PCEF与 PCRF之间的接口是 Gx 接口，与 OCS之间的接口是 Gy接口，与 OFCS之间的接口是 Gz接口。 PCEF 一般都位于网络的网关上， 如 GPRS 中的 GPRS 网关支持节点 （GGSN, Gateway GPRS Support Node )以及 I-WLAN中的分组数据网关（ PDG, Packet Data Gateway )。
BBERF用于承载绑定、 上行承载绑定的验证、 以及事件报告。 当 UE 通过 E-UTRAN接入， 并且 S-GW与 P-GW之间釆用移动性管理协议为支 持双栈的移动 IPv6 ( DSMIPv6, Moblie IPv6 support for dual stack Hosts and Routers )协议时， BBERF就位于 S-GW, 当 UE通过可信任非 3GPP接入 系统接入时， BBERF位于可信任非 3GPP接入网关， 当 UE通过不可信任 非 3GPP接入系统接入时、 BBERF位于演进的分组数据网关（ ePDG, Evolved Packet Data Gateway。 此时， PCEF不再执行 7 载绑定功能。
SPR存储了和策略和计费控制与计费相关的用户策略计费控制签约信 息。 SPR和 PCRF之间的接口是 Sp接口。
OCS和 PCEF—起进行在线计费方式下用户信用的控制和管理。 OFCS 与 PCEF—起完成离线计费方式下的计费操作。
PCC 系统通过以上各功能实体实现了对 UE 为访问分组数据网络 ( PDN, Packet Data Network )所建立的 IP-CAN会话的策略计费控制。 PCC 系统使得对用户的多层次、 多纬度的计费成为可能。 对于在线计费， 当 UE 通过接入网接入时， 由 PCEF与 OCS交互， 进行信用控制。 PCEF向计费 系 统 提 供 承 载 层 计 费 信 息 ， 用 接 入 网 计 费 标 识 ( Access-Network-Charging-Identifier, 也称为承载层计费标识 )进行标识。 同时应用服务器也向计费系统提供应用层计费信息， 利用应用功能计费标 识（ AF-Charging-Identifier )进行标识， 该计费标识由 AF产生并发送给相 关的应用服务器。 AF 自身也可向计费系统提供应用层计费信息， 同样用 AF-Charging-Identifier进行标识。 AF或应用服务器产生的计费信息均为应 用层计费信息。接入网计费标识通过 PCRF上报给 AF以及其他应用服务器， 应用层的计费信息包含承载层的计费标识。而通过 PCEF产生的承载层计费 系统中包含应用功能计费标识。 这样， 计费系统就可以通过这两个计费标 识将用户两个层次的计费信息进行关联， 从而实现对用户访问业务多层次、 多维度的计费了。
然而， 现有的网络应用中， 很多场景下是没有 AF的。 IP多媒体子系 统（IMS , IP Multimedia Subsystem )等基于会话类的业务可以釆用初始会 话协议（SIP, SIP Session Initiation Protocol, 是应用层的信令控制协议）信 令进行会话的业务层协商 （如编解码方式、 媒体类型、 所需的带宽等）， P-CSCF(即 PCC系统中的 AF )将协商好的业务信息通知 PCRF,并由 PCRF 进行 QoS授权。 而现网中大量非会话类的业务， 如当前应用基于 IP网络的 语音（VoIP, Voice Over Internet Protocol ), 互联网协议电视（ IPTV, IPTV Internet Protocol Television )、 视频点播 ( VoD, VOD Video-On-Demand )、 网络游戏等业务等不会进行应用层的媒体协商以及将业务信息发送给 PCRF的过程。 发明内容
有鉴于此， 本发明的主要目的在于提供一种增强的策略和计费控制的 方法及系统， 以及 PCC系统， 能实现对非会话类业务的策略和计费控制， 特别能对业务进行四层以上的计费操作。
为达到上述目的， 本发明的技术方案是这样实现的：
一种增强的策略和计费控制的方法， 在策略和计费控制 PCC系统中设 置业务检测执行功能实体 TDEF; 所述方法包括：
所述 TDEF根据策略和计费规则功能实体 PCRF制定的业务执行规则 执行计费控制。
优选地， 所述方法还包括：
所述 PCRF 制定 PCC规则时， 确定对与所述 PCC规则匹配的业务数 据流进行四层以上策略和计费的控制后， 制定所述业务执行规则并发送给 所述 TDEF;
所述 PCRF向策略和控制执行功能实体 PCEF发送 PCC规则时， 指示 对与所述 PCC规则匹配的业务数据流进行四层以上策略和计费的控制； 所述 TDEF对业务数据流进行四层以上的计费控制， 并向计费系统提 供相应的计费信息。
优选地， 所述方法还包括：
所述 TDEF 根据业务检测规则在业务数据流中检测到之前未向所述 PCRF 告过的业务时， 向所述 PCRF上 ^艮所述未向所述 PCRF 告过的业 务；
所述 PCRF为所述未向所述 PCRF报告过的业务制定 PCC规则， 同时 确定对与所述 PCC规则匹配的业务数据流进行四层以上策略和计费的控制 后， 制定业务执行规则并发送给所述 TDEF;
所述 TDEF向在线计费系统请求新的信用和 /或返回剩余的信用， 为所 述 TDEF检测到业务进行四层以上的在线计费。
优选地， 所述方法还包括：
所述 TDEF根据所述业务检测规则在业务数据流中检测到之前未向所 述 PCRF ^艮告过的业务时，为所述之前未向所述 PCRF ^艮告过的业务分配应 用计费标识， 并发送给所述 PCRF。
优选地， 所述方法还包括：
所述 PCRF接收到所述 TDEF上报的之前未向所述 PCRF报告过的业务 时， 为所述之前未向所述 PCRF报告过的业务分配应用计费标识， 并发送 给所述 TDEF。
优选地， 所述方法还包括：
所述 PCRF 将所述 PCC 规则对应的所述应用计费标识发送给所述 PCEF;
所述 PCEF向离线计费系统上 ^艮接入网计费标识、所述应用计费标识和 承载计费信息；
所述离线计费系统保存所述接入网计费标识、 所述应用计费标识和承 载计费信息， 实现业务的离线计费。
优选地， 所述方法还包括：
所述 PCRF将所述业务执行规则对应的所述接入网计费标识发送给所 述 TDEF;
所述 TDEF向离线计费系统上 ^艮接入网计费标识、 所述应用计费标识 和应用计费信息；
所述离线计费系统保存所述接入网计费标识、 所述应用计费标识和所 述应用计费信息， 实现业务的离线计费。
优选地， 所述离线计费系统根据所述接入网计费标识、 所述应用计费 标识将所述承载计费信息和所述应用计费信息进行关联。
优选地，所述计费系统包括在线计费系统 OCS和离线计费系统 OFCS, 所述 TDEF与所述 OCS之间通过 Gy接口连接 , 所述 TDEF与所述 OFCS 之间通过 Gz接口连接。
一种 PCC系统， 包括用户签约数据库 SPR、 AF、 PCRF, BBERF, PCEF 和计费系统， 所述 SPR、 所述 AF、 所述 BBERF和所述 PCEF分别与所述 PCRF连接，所述 PCEF连接于所述计费系统；所述 PCC系统还包括 TDEF, 分别与所述 PCRF、 所述计费系统连接； 所述 TDEF根据策略和计费规则功 能实体 PCRF制定的业务执行规则执行计费控制。
优选地 , 所述 TDEF与所述 PCRF之间通过 Sx接口连接。
优选地，所述计费系统包括在线计费系统 OCS和离线计费系统 OFCS, 所述 TDEF与所述 OCS之间通过 Gy接口连接， 所述 TDEF与所述 OFCS 之间通过 Gz接口连接。
一种增强的策略和计费控制的系统， 包括设置单元、 制定单元和执行 单元； 其中：
设置单元， 用于在 PCC系统中设置 TDEF;
制定单元， 用于制定 PCC规则、 业务检测规则和业务执行规则； 执行单元， 用于根据 PCRF制定的业务执行规则执行计费控制。
优选地， 所述系统还包括确定单元、 第一发送单元、 第二发送单元和 计费及提供单元， 其中：
确定单元， 用于在所述制定单元制定 PCC规则时， 确定对与所述 PCC 规则匹配的业务数据流进行四层以上策略和计费的控制后， 触发所述制定 单元进一步制定业务执行规则；
第一发送单元， 用于将所述业务检测规则或 /和业务执行规则发送给所 述 TDEF;
第二发送单元， 用于向 PCEF发送 PCC规则， 并指示对与所述 PCC规 则匹配的业务数据流进行四层以上策略和计费的控制；
计费及提供单元， 用于对业务数据流进行四层以上的计费控制， 并向 计费系统提供相应的计费信息。
优选地， 所述系统还包括检测单元和上 ^艮单元， 其中：
检测单元， 用于根据所述业务检测规则对业务数据流进行检测， 检测 到之前未向所述 PCRF ^艮告过的业务时， 触发上 单元； 所述制定单元为所述未向所述 PCRF报告过的业务制定 PCC规则， 所 述确定单元进一步确定对与所述 PCC规则匹配的业务数据流进行四层以上 策略和计费的控制时， 所述制定单元制定业务执行规则， 并由所述第一发 送单元发送给所述 TDEF。 优选地， 所述系统还包括：
第一分配单元， 用于向所述检测单元检测到之前未向所述 PCRF报告 过的业务分配应用计费标识； 所述上报单元进一步将所述应用计费标识上 报给所述 PCRF。
优选地， 所述系统还包括：
第二分配单元， 用于为所述 TDEF上报的之前未向所述 PCRF报告过 的业务分配应用计费标识， 并由所述第一发送单元发送给所述 TDEF。
优选地， 所述第二发送单元将所述 PCC规则对应的所述应用计费标识 发送给所述 PCEF;
所述 PCEF向离线计费系统提供接入网计费标识、所述应用计费标识和 承载计费信息； 所述离线计费系统保存所述接入网计费标识、 所述应用计 费标识和承载计费信息， 实现业务的离线计费。
优选地， 所述系统还包括：
所述第一发送单元将业务执行规则对应的所述应用计费标识发送给所 述 TDEF;
所述 TDEF向离线计费系统上 ^艮接入网计费标识、 所述应用计费标识 和应用计费信息； 所述离线计费系统保存所述接入网计费标识、 所述应用 计费标识和所述应用计费信息， 实现业务的离线计费。
优选地， 所述离线计费系统根据所述接入网计费标识、 所述应用计费 标识将所述承载计费信息和应用计费信息进行关联。
本发明中， 在当前的 PCC 系统中增设业务探测功能 （TDF , Traffic Detection Function ), 实现对业务数据流四层以上的信息进行检测， 这样向 PCRF提供业务信息将更丰富， 有利于 PCRF进行策略决策， 能实现对业务 四层以上的计费操作， 从而实现了对业务数据进行多层次、 多纬度的计费 控制。 附图说明
图 1为相关技术的 Rel-8 PCC非漫游架构示意图；
图 2为本发明 PCC系统组成结构示意图；
图 3是本发明增强的策略和计费控制的方法实施例一的流程图； 图 4是本发明增强的策略和计费控制的方法实施例二的流程图； 图 5是本发明增强的策略和计费控制的方法实施例三的流程图； 图 6为本发明增强的策略和计费控制的系统的一种组成结构示意图； 图 7为本发明增强的策略和计费控制的系统的另一种组成结构示意图； 图 8为本发明增强的策略和计费控制的系统的又一种组成结构示意图。 具体实施方式
本发明的基本思想是： 在当前的 PCC系统中增设业务探测功能（TDF, Traffic Detection Function ), 实现对业务数据流四层以上的信息进行检测， 这样向 PCRF提供业务信息将更丰富，有利于 PCRF进行策略决策， 能实现 对业务四层以上的计费操作， 从而实现了对业务数据进行多层次、 多纬度 的计费控制。
为使本发明的目的、 技术方案和优点更加清楚明白， 以下举实施例并 参照附图， 对本发明进一步详细说明。
图 2为本发明 PCC系统组成结构示意图，如图 2所示， 本发明 PCC系 统是在图 1所示的 PCC系统上增设 TDEF而成的， 具体的， TDEF设置于 计费系统与 PCRF之间， TDEF通过 Sx接口连接于 PCRF, 与 OCS之间通 过 Gy接口连接， 与 OFCS之间通过 Gz接口连接。 TDEF的主要功能包括：
1、 根据 PCRF下发的报文检测规则 （四层以上的策略和计费控制的规 则 )执行业务数据报文检测， 对数据包进行四层以上的分析检测；
2、 向 PCRF上报检测的业务信息；
3、 基于四层以上过滤器进行门控、 QoS策略执行； 4、 向计费系统（OCS/OFCS )上报计费信息
5、 向 PCRF上报需要进行承载层资源修改的请求；
6、 上报 PCRF订阅的事件。
以下基于图 2所示的 PCC系统， 进一步详细阐明本发明增强的策略和 计费控制的方法的具体实现方式。
实施例一
图 3是本发明增强的策略和计费控制的方法实施例一的流程图，如图 3 所示， 本实施例描述的是 IP-CAN会话建立流程， 具体步骤如下：
步骤 S301 , BBERF驻留的网关收到建立 IP-CAN会话请求消息， 消息 中携带用户标识、 PDN标识等信息。
步骤 S302, BBERF向 PCRF发送网关控制会话建立请求消息， 消息中 携带用户标识、 PDN标识等信息。 该消息用于请求建立网关控制会话。
步骤 S303 , 若 PCRF没有用户相关的签约信息， PCRF向 SPR发送签 约文档请求消息， 消息中携带用户标识和 PDN标识等。 若 PCRF中存储有 用户相关的签约信息， 则直接执行步骤 S305 , 根据签约信息制定相应的策 略。
步骤 S304, SPR根据用户标识和 PDN标识返回用户的签约信息，其中 包含是否需要进行业务检测， 以及需要检测的业务。
步骤 S305 , PCRF根据 SPR返回的签约信息，制定默认策略，包括 PCC 规则、 对应的 QoS规则。 若需要进行业务检测， 则 PCRF根据需要检测的 业务制定业务检测规则。 业务检测规则通常包括四层以上的过滤器。 若下 发的 PCC规则还需要进一步执行四层以上的策略和计费控制， 则 PCRF还 会制定对应的对业务数据流进行四层以上策略和计费控制的规则 （在本发 明中， 该规则称为业务执行规则）。 可选的， PCRF还会制定事件触发器。
步骤 S306, PCRF向 BBERF返回网关控制会话建立确认消息， 消息中 携带 QoS规则、 事件触发器等。 BBERF安装 QoS规则和事件触发器。 步骤 S307 , BBERF驻留的网关向 PCEF驻留的网关发送建立 IP-CAN 会话请求消息， 消息中携带用户标识和 PDN标识等信息。
本发明中， 步骤 S307可与步骤 S302同时执行。
步骤 S308, PCEF驻留的网关为 UE请求建立的 IP-CAN会话分配 IP 地址以及接入网计费标识。 PCEF向 PCRF发送 IP-CAN会话建立指示消息 , 消息中携带用户标识、 PDN标识、 IP Address和接入网计费标识等信息。 该 消息用于请求建立 Gx会话。
步骤 S309 , PCRF根据用户标识和 PDN标识将步骤 S302请求建立网 关控制会话和步骤 S308请求建立的 Gx会话进行关联。 PCRF将步骤 S304 制定的 PCC规则、 事件触发器以及为该 IP-CAN会话选择的 TDEF的地址 返回给 PCEF。 对于每一个 PCC规则， PCRF同时会向 PCEF发送是否需要 进行四层以上过滤的策略和计费控制指示，若需要，则 PCEF将把与该 PCC 规则匹配的业务数据流转发给 TDEF。
步骤 S310, 如果需要执行在线计费控制， 并且至少一个 PCC规则是激 活的， 则 PCEF激活在线计费会话， 并提供相关的输入信息供 OCS决策， 输入信息包括用户标识等信息。 该在线计费会话用于承载层 （四层以下） 的在线计费。
步骤 S311 , OCS提供可能的信用信息给 PCEF。 OCS还会为每一个信 用提供重授权触发。
步骤 S312,如果至少一个 PCC规则被成功激活并且在线计费被应用且 信用没有被 OCS拒绝， PCEF驻留的网关向 BBERF驻留的网关返回建立 IP-CAN会话应答消息， 携带有 IP-CAN会话的 IP Address。
步骤 S313 , BBERF驻留的网关返回建立 IP-CAN会话应答消息， 携带 有 IP-CAN会话的 IP地址。 步骤 S314 , PCRF向所选择的 TDEF发送业务检测会话建立请求消息， 消息中携带用户标识、 PDN标识、 IP-CAN会话的 IP Address和接入网计费 标识。 PCRF还会向 TDEF提供业务检测规则和 /或业务执行规则。 该请求 消息用于建立业务检测会话。
步骤 S315 , PCEF安装业务检测规则和业务检测和执行规则后向 PCRF 返回确认消息。
步骤 S316, 如果需要执行在线计费控制， 并且至少一个业务检测和执 行规则被激活，则 TDEF激活在线计费会话，并提供相关的输入信息供 OCS 决策， 输入信息包括用户标识等信息。 该在线计费会话用于应用层 （7层） 的在线计费。
步骤 S317, OCS提供可能的信用信息给 TDEF。 OCS还会为每一个信 用提供重授权触发。 OCS根据用户标识将把步骤 S310建立信用控制会话和 步骤 S316建立的信用控制会话进行关联。
本发明中， 上述步骤 S314在步骤 S305后便可执行。 步骤 S316可在步 骤 S314后即可执行。
通过以上流程， UE建立 IP-CAN会话，并且 PCRF将实现对该 IP-CAN 会话进行策略和计费控制的网关控制会话、 Gx会话和业务检测会话进行关 联。 PCEF和 TDEF分别与 OCS之间建立的信用控制会话， 并在 OCS实现 的会话关联， 这样对于那些非会话类的业务， OCS都能进行承载层与应用 层的计费关联分析。
实施例二
图 4是本发明增强的策略和计费控制的方法实施例二的流程图，如图 4 所示， 本实施例描述了由 TDEF根据业务检测规则检测到新的业务后， 发 起的 IP-CAN会话修改流程 , 在该流程中 , BBERF驻留的网关与 PCEF驻 留的网关之间釆用 PMIPv6协议进行通信。 具体步骤如下： 步骤 S401 , TDEF根据 PCRF下发的业务检测规则对流经的业务数据 流进行检测， 并检测到了之前没有向 PCRF报告过的业务。
步骤 S402, TDEF向 PCRF上报检测到的业务。 TDEF可以通过上 4艮对 应的业务检测规则的标识或 PCRF和 TDEF之间预配置的该业务的标识向 PCRF报告。同时 TDEF也会为该业务分配一个计费标识用于标识四层以上 的计费信息 （在本发明中该计费标识称为应用计费标识， 四层以上的计费 信息称为应用计费信息）， 并发送给 PCRF。
步骤 S403 , PCRF保存 TDEF上 ^艮的信息后 , 向 TDEF返回确认消息。 步骤 S404, PCRF根据签约信息、 接入信息、 网络策略以及 TDEF上 报的业务信息进行策略决策。 PCRF策略包括 PCC规则以及对应的 QoS规 则。 PCC规则包括四层的过滤器， PCEF根据四层过滤器对业务数据流进行 检测， 进行策略和计费控制。 若下发的 PCC规则还需要进一步执行四层以 上的策略和计费控制， 则 PCRF还会制定对应的业务执行规则。 业务执行 规则包括四层以上的过滤器， 这样 TDEF就可以根据四层以上过滤器对业 务数据流进行检测，并进行策略和计费控制。 PCRF还可以制定事件触发器， 用于向 BBERF、 PCEF或 TDEF进行事件订阅。
步骤 S405 , PCRF向 BBERF发送网关控制和 QoS规则提供消息， 携 带 QoS规则， 以及事件触发器。
步骤 S406 , BBERF安装 QoS规则和事件触发器。 BBERF所在网关根 据 QoS规则执行 QoS控制， 进行承载的建立、 修改或终结。
步骤 S407、 BBERF向 PCRF返回确认消息。
步骤 S408 , PCRF向 PCEF发送策略和计费规则提供消息，携带有 PCC 规则和事件触发器。 对于每一个 PCC规则， PCRF同时会向 PCEF发送是 否需要进行四层以上过滤的策略和计费控制指示，若需要，则 PCEF将把与 该 PCC规则匹配的业务数据流转发给 TDEF。 PCRF会将 TDEF上报的应用 计费标识发送给 PCEF。
步骤 S409, PCEF安装 PCC规则和事件触发器。 PCEF将根据四层以 上过滤的策略和计费控制指示把该 PCC规则检测到的业务数据流转发给在 IP-CAN会话建立过程中 PCRF为该 IP-CAN会话选择的 TDEF。
步骤 S410, 如果执行在线计费， 则 PCEF可能向 OCS为新的计费键 ( Charging Keys )请求新的信用和 /或返回不再激活的 Charging Key剩余的 信用。
步骤 S411 , OCS向 PCEF提供信用和 /或确认信用报告。
步骤 S412, PCEF向 PCRF返回确认消息。
步骤 S413 , PCRF向 TDEF发送业务执行规则提供消息， 提供业务执 行规则和事件触发器。
步骤 S414, TDEF安装业务执行规则和事件触发器。
步骤 S415 ,如果执行在线计费，则 TDEF向 OCS为新的计费键（ Charging Keys )请求新的信用和 /或返回不再激活的 Charging Keys剩余的信用； 步骤 S416, OCS向 TDEF提供信用和 /或确认信用报告；
步骤 S417 , TDEF向 PCRF返回确认消息。
通过以上流程， PCEF和 TDEF分别通过与 OCS之间建立的信用控制 会话为 TDEF检测到那些非会话类业务进行承载层 （四层以下）和应用层 (四层以上 ) 的在线计费。 并且 TDEF把应用计费标识通过 PCRF发送给 PCEF, 实现对业务的计费。
在实施例二中， TDEF为每一个新检测到业务分配一个应用计费标识。 而在其他实施例中， 也可以通过其他方法实现：
PCRF接收到 TDEF上报的检测到的新业务的报告后，为该业务分配应 用计费标识， 并发送给 TDEF。 同时， PCRF也将该应用计费标识发送给 PCEF。 实施例三
图 5是本发明增强的策略和计费控制的方法实施例三的流程图，如图 5 所示， 本实施例描述了基于实施例一和实施例二， PCEF和 TDEF实现多层 次离线计费的流程， 具体步骤如下：
步骤 S501 , PCEF所驻留的网关收到触发需要向 OFCS上 4艮计费信息。 步骤 S502, PCEF所驻留的网关向 OFCS上报信息， 携带接入网计费 标识、 应用计费标识和承载计费信息。
步骤 S503 , OFCS保存计费信息。
步骤 S504, OFCS返回确认消息。
步骤 S505 , TDEF所驻留的网关收到触发需要向 OFCS上 4艮计费信息。 步骤 S506, TDEF所驻留的网关向 OFCS上报信息， 携带接入网计费 标识、 应用计费标识和应用计费信息。
步骤 S507, OFCS保存计费信息。
步骤 S508, OFCS返回确认消息。
步骤 S509 , OFCS根据接入网计费标识和应用计费标识将步骤 S507和 步骤 S508保存的计费信息进行关联， 实现对非会话类业务进行承载层（四 层以下）和应用层 （四层以上） 的离线计费。
图 6为本发明增强的策略和计费控制的系统的一种组成结构示意图， 如图 6所示， 本发明增强的策略和计费控制的系统包括设置单元 601、制定 单元 602、 执行单元 603、 确定单元 604、 第一发送单元 605、 第二发送单 元 606和计费及提供单元 607 , 其中：
设置单元 601 , 用于在 PCC系统中设置 TDEF;
制定单元 602 , 用于制定 PCC规则、 业务检测规则和业务执行规则； 执行单元 603 , 用于根据 PCRF制定的业务执行规则执行计费控制。 如图 6所示，本发明增强的策略和计费控制的系统还包括确定单元 604、 第一发送单元 605、 第二发送单元 606和计费及提供单元 607, 其中： 确定单元 604, 用于在制定单元 602制定 PCC规则时， 确定对与所述
PCC规则匹配的业务数据流进行四层以上策略和计费的控制后， 触发制定 单元 602进一步制定业务执行规则；
第一发送单元 605 , 用于将所述业务检测规则或 /和业务执行规则发送 给所述 TDEF;
第二发送单元 606,用于向 PCEF发送 PCC规则，并指示对与所述 PCC 规则匹配的业务数据流进行四层以上策略和计费的控制；
计费及提供单元 607, 用于对业务数据流进行四层以上的计费控制， 并 向计费系统提供相应的计费信息。
本领域技术人员应当理解， 确定单元 604、 第一发送单元 605、 第二发 送单元 606和计费及提供单元 607是为优化本发明增强的策略和计费控制 的系统的技术方案而设置的。
图 7为本发明增强的策略和计费控制的系统的第二种组成结构示意图， 如图 7所示， 在图 6所示的增强的策略和计费控制的系统的基础上， 本发 明增强的策略和计费控制的系统还包括检测单元 608和上报单元 609 ,其中， 检测单元 608, 用于根据所述业务检测规则对业务数据流进行检测，检 测到之前未向所述 PCRF ^艮告过的业务时， 触发上 4艮单元 609; 务；
制定单元 602为所述未向所述 PCRF报告过的业务制定 PCC规则， 确 定单元 604进一步确定对与所述 PCC规则匹配的业务数据流进行四层以上 策略和计费的控制时， 制定单元 602制定业务执行规则， 并由第一发送单 元 605发送给所述 TDEF。
本领域技术人员应当理解， 检测单元 608和上报单元 609是为优化本 发明增强的策略和计费控制的系统的技术方案而设置的。
图 8为本发明增强的策略和计费控制的系统的又一种组成结构示意图 , 如图 8所示， 在图 7所示的增强的策略和计费控制的系统的基础上， 本发 明增强的策略和计费控制的系统还包括：
第一分配单元 610,用于向所述检测单元检测到之前未向所述 PCRF报 告过的业务分配应用计费标识； 上>¾单元 609进一步将所述应用计费标识 上才艮给所述 PCRF。
为进一步优化本发明增强的策略和计费控制的系统的技术方案， 所述 系统还包括：
第二分配单元 611 ,用于为所述 TDEF上报的之前未向所述 PCRF报告 过的业务分配应用计费标识， 并由第一发送单元 605发送给所述 TDEF。
优选地， 第二发送单元 606将所述 PCC规则对应的所述应用计费标识 发送给所述 PCEF;
所述 PCEF向离线计费系统提供接入网计费标识、所述应用计费标识和 承载计费信息； 所述离线计费系统保存所述接入网计费标识、 所述应用计 费标识和承载计费信息， 实现业务的离线计费。
第一发送单元 605进一步将业务执行规则对应的所述应用计费标识发 送给所述 TDEF; 所述 TDEF向离线计费系统上报接入网计费标识、 所述应 用计费标识和应用计费信息； 所述离线计费系统保存所述接入网计费标识、 所述应用计费标识和所述应用计费信息， 实现业务的离线计费。
所述离线计费系统根据所述接入网计费标识、 所述应用计费标识将所 述承载计费信息和应用计费信息进行关联。
本领域技术人员应当理解， 图 6、 图 7及图 8所示的增强的策略和计费 控制的系统是为实现前述的增强的策略和计费控制的方法而设计的， 图 6、 图 7及图 8所示的增强的策略和计费控制的系统中各处理单元的功能可参 照图 3至图 5所示方法的描述而理解， 各处理单元的功能可通过运行于处 理器上的程序而实现， 也可通过具体的逻辑电路而实现。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、一种增强的策略和计费控制的方法，在策略和计费控制 PCC系统中 设置业务检测执行功能实体 TDEF; 其特征在于， 所述方法包括：
所述 TDEF根据策略和计费规则功能实体 PCRF制定的业务执行规则 执行计费控制。
2、 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括： 所述 PCRF 制定 PCC规则时， 确定对与所述 PCC规则匹配的业务数 据流进行四层以上策略和计费的控制后， 制定所述业务执行规则并发送给 所述 TDEF;
所述 PCRF向策略和控制执行功能实体 PCEF发送 PCC规则时， 指示 对与所述 PCC规则匹配的业务数据流进行四层以上策略和计费的控制； 所述 TDEF对业务数据流进行四层以上的计费控制， 并向计费系统提 供相应的计费信息。
3、 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括： 所述 TDEF 根据业务检测规则在业务数据流中检测到之前未向所述
PCRF 告过的业务时， 向所述 PCRF上 ^艮所述未向所述 PCRF 告过的业 务；
所述 PCRF为所述未向所述 PCRF报告过的业务制定 PCC规则， 同时 确定对与所述 PCC规则匹配的业务数据流进行四层以上策略和计费的控制 后， 制定业务执行规则并发送给所述 TDEF;
所述 TDEF向在线计费系统请求新的信用和 /或返回剩余的信用， 为所 述 TDEF检测到业务进行四层以上的在线计费。
4、 根据权利要求 3所述的方法， 其特征在于， 所述方法还包括： 所述 TDEF根据所述业务检测规则在业务数据流中检测到之前未向所 述 PCRF ^艮告过的业务时，为所述之前未向所述 PCRF ^艮告过的业务分配应 用计费标识， 并发送给所述 PCRF。
5、 根据权利要求 3所述的方法， 其特征在于， 所述方法还包括： 所述 PCRF接收到所述 TDEF上报的之前未向所述 PCRF报告过的业务 时， 为所述之前未向所述 PCRF报告过的业务分配应用计费标识， 并发送 给所述 TDEF。
6、 根据权利要求 2、 4或 5所述的方法， 其特征在于， 所述方法还包 括：
所述 PCRF 将所述 PCC 规则对应的所述应用计费标识发送给所述 PCEF;
所述 PCEF向离线计费系统上 ^艮接入网计费标识、所述应用计费标识和 承载计费信息；
所述离线计费系统保存所述接入网计费标识、 所述应用计费标识和承 载计费信息， 实现业务的离线计费。
7、 根据权利要求 2、 4或 5所述的方法， 其特征在于， 所述方法还包 括：
所述 PCRF将所述业务执行规则对应的所述接入网计费标识发送给所 述 TDEF;
所述 TDEF向离线计费系统上 ^艮接入网计费标识、 所述应用计费标识 和应用计费信息；
所述离线计费系统保存所述接入网计费标识、 所述应用计费标识和所 述应用计费信息， 实现业务的离线计费。
8、 根据权利要求 2、 4或 5所述的方法， 其特征在于， 所述离线计费 系统根据所述接入网计费标识、 所述应用计费标识将所述承载计费信息和 所述应用计费信息进行关联。
9、 根据权利要求 2、 4或 5所述的方法， 其特征在于， 所述计费系统 包括在线计费系统 OCS和离线计费系统 OFCS ,所述 TDEF与所述 OCS之 间通过 Gy接口连接， 所述 TDEF与所述 OFCS之间通过 Gz接口连接。
10、 一种 PCC系统， 包括用户签约数据库 SPR、 AF、 PCRF、 BBERF、 PCEF和计费系统， 所述 SPR、 所述 AF、 所述 BBERF和所述 PCEF分别与 所述 PCRF连接， 所述 PCEF连接于所述计费系统； 其特征在于， 所述 PCC 系统还包括 TDEF, 分别与所述 PCRF、 所述计费系统连接； 所述 TDEF根 据策略和计费规则功能实体 PCRF制定的业务执行规则执行计费控制。
11、根据权利要求 10所述的 PCC系统， 其特征在于， 所述 TDEF与所 述 PCRF之间通过 Sx接口连接。
12、 根据权利要求 10或 11所述的 PCC系统， 其特征在于， 所述计费 系统包括在线计费系统 OCS和离线计费系统 OFCS ,所述 TDEF与所述 OCS 之间通过 Gy接口连接 , 所述 TDEF与所述 OFCS之间通过 Gz接口连接。
13、 一种增强的策略和计费控制的系统， 其特征在于， 包括设置单元、 制定单元和执行单元； 其中：
设置单元， 用于在 PCC系统中设置 TDEF;
制定单元， 用于制定 PCC规则、 业务检测规则和业务执行规则； 执行单元， 用于根据 PCRF制定的业务执行规则执行计费控制。
14、 根据权利要求 13所述的系统， 其特征在于， 所述系统还包括确定 单元、 第一发送单元、 第二发送单元和计费及提供单元， 其中：
确定单元， 用于在所述制定单元制定 PCC规则时， 确定对与所述 PCC 规则匹配的业务数据流进行四层以上策略和计费的控制后， 触发所述制定 单元进一步制定业务执行规则；
第一发送单元， 用于将所述业务检测规则或 /和业务执行规则发送给所 述 TDEF;
第二发送单元， 用于向 PCEF发送 PCC规则， 并指示对与所述 PCC规 则匹配的业务数据流进行四层以上策略和计费的控制；
计费及提供单元， 用于对业务数据流进行四层以上的计费控制， 并向 计费系统提供相应的计费信息。
15、 根据权利要求 14所述的系统， 其特征在于， 所述系统还包括检测 单元和上报单元， 其中：
检测单元， 用于根据所述业务检测规则对业务数据流进行检测， 检测 到之前未向所述 PCRF ^艮告过的业务时， 触发上 单元； 所述制定单元为所述未向所述 PCRF报告过的业务制定 PCC规则， 所 述确定单元进一步确定对与所述 PCC规则匹配的业务数据流进行四层以上 策略和计费的控制时， 所述制定单元制定业务执行规则， 并由所述第一发 送单元发送给所述 TDEF。
16、 根据权利要求 15所述的系统， 其特征在于， 所述系统还包括： 第一分配单元， 用于向所述检测单元检测到之前未向所述 PCRF报告 过的业务分配应用计费标识； 所述上报单元进一步将所述应用计费标识上 报给所述 PCRF。
17、 根据权利要求 14所述的系统， 其特征在于， 所述系统还包括： 第二分配单元， 用于为所述 TDEF上报的之前未向所述 PCRF报告过 的业务分配应用计费标识， 并由所述第一发送单元发送给所述 TDEF。
18、 根据权利要求 16或 17所述的系统， 其特征在于， 所述第二发送 单元将所述 PCC规则对应的所述应用计费标识发送给所述 PCEF;
所述 PCEF向离线计费系统提供接入网计费标识、所述应用计费标识和 承载计费信息； 所述离线计费系统保存所述接入网计费标识、 所述应用计 费标识和承载计费信息， 实现业务的离线计费。
19、 根据权利要求 16或 17所述的系统， 其特征在于， 所述系统还包 括：
所述第一发送单元将业务执行规则对应的所述应用计费标识发送给所 述 TDEF;
所述 TDEF向离线计费系统上 ^艮接入网计费标识、 所述应用计费标识 和应用计费信息； 所述离线计费系统保存所述接入网计费标识、 所述应用 计费标识和所述应用计费信息， 实现业务的离线计费。
20、 根据权利要求 19所述的系统， 其特征在于， 所述离线计费系统根 据所述接入网计费标识、 所述应用计费标识将所述承载计费信息和应用计 费信息进行关联。
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