CN102137367B - Method and system, PCC system that the strategy strengthened and charging control - Google Patents

Abstract

The invention discloses a method for enhanced policy and charging control. TDEF is set in the PCC system, and the TDEF is connected between the PCRF and the charging system; the method includes: when the PCRF formulates PCC rules, determine Whether to control the business data flow matching the PCC rule for more than four layers of policy and charging; when the PCRF sends the PCC rule to the policy and control enforcement function entity PCEF, it indicates whether to control the business data flow matching the PCC rule The data flow is controlled by more than four layers of policy and charging; and when the indication is yes, the rules for controlling the business data flow of more than four layers of policy and charging are sent to the TDEF; the TDEF performs four layers of business data flow The billing above the layer, and provide the corresponding billing information to the billing system. The invention discloses an enhanced policy and charging control system and a PCC system. The invention realizes multi-level and multi-latitude charging control on service data.

Description

Enhanced policy and charging control method and system, PCC system

technical field

The present invention relates to enhanced policy and charging control (PCC, Policy and Charging Control) technology, in particular to an enhanced policy and charging control method and system, and a PCC system.

Background technique

The PCC system of the 3rd Generation Partnership Project (3GPP, 3rdGeneration Partnership Project) is a functional framework that can be applied to multiple access technologies, for example, it can be applied to the terrestrial wireless access network of the Universal Mobile Telecommunications System (UMTS, UniversalMobileTelecommunicationsSystem) (UTRAN, UMTSTerrestrialRadioAccessNetwork), Global System for Mobile Communications (GSM, GlobalsystemforMobileCommunication)/GSM Data Enhanced Evolution (EDGE, EnhancedDataratesforGlobalEvolution) wireless access network, interoperable wireless local area network (I-WLAN), and evolved packet system (EPS, EvolvedPacketSystem), etc.

Figure 1 is a schematic diagram of the Rel-8 PCC non-roaming architecture of the related art. As shown in Figure 1, the PCC system includes a user subscription database (SPR, SubscriptionProfileRepository), an application function entity (AF, ApplicationFunction), and a policy and charging rule function entity ( PCRF, PolicyandChargingRuleFunction), bearer binding and event reporting function entity (BBERF, BearerBindingandEventReportingFunction), policy and control enforcement function entity (PCEF, PolicyandControlEnforcementFunction) and charging system, wherein, SPR is connected to PCRF through Sp interface, and AF is connected to PCRF through Rx interface PCRF connection, BBERF is connected to PCRF through Gxx interface, PCEF is connected to PCRF through Gx interface; charging system includes online charging system (OCS, OnlineChargingSystem) and offline charging system (OFCS, OfflineChargingSystem), PCEF is connected to OCS through Gy interface , PCEF is connected to OFCS through Gz interface. The following describes each logical functional entity and its interface function in the PCC system with reference to Figure 1:

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. When negotiating parameters on the service plane, the AF transmits 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 gives the PCRF acceptable service parameters in the feedback. Then, the AF can return these parameters to the user equipment (UE, UserEquipment). Wherein, the interface between the AF and the PCRF is the Rx interface.

The PCRF is the core of the PCC and is responsible for making policy decisions and charging rules. PCRF provides network control rules based on service data flow, and these network controls include service data flow detection, gating control (Gating Control), service quality (QoS, Quality of Service) control, and data flow-based charging rules. The PCRF sends the policies and charging rules formulated by it 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 the PCRF to formulate policy and charging rules includes: obtaining service-related information from the AF; obtaining subscription information related to user policy and charging control from the SPR; obtaining information related to the bearer network from the PCEF.

The PCEF is usually located in a gateway (GW, Gate-Way), and executes policies and charging rules formulated by the PCRF on the bearer plane. The PCEF detects the service data flow according to the service data flow filter in the rules sent by the PCPF, and then executes the policies and charging rules formulated by the PCPF for these service data flows. When the bearer is established, the PCEF performs QoS authorization according to the rules sent by the PCRF, and performs gate control according to the execution of the AF. According to the charging rule sent by the PCRF, the PCEF executes the corresponding service data flow charging operation, and the charging can be either online charging or offline charging. If online charging is used, PCEF needs to perform credit management together with OCS. During offline charging, related charging information is exchanged between PCEF and OFCS. The interface between PCEF and PCPF is Gx interface, the interface between PCEF and OCS is Gy interface, and the interface between PCEF and OFCS is Gz interface. PCEF is generally located on the gateway of the network, such as the GPRS gateway support node (GGSN, GatewayGPRSSupportNode) in GPRS and the packet data gateway (PDG, PacketDataGateway) in I-WLAN.

BBERF is used for bearer binding, verification of uplink bearer binding, and event reporting. When the UE accesses through the E-UTRAN, and the mobility management protocol between the S-GW and the P-GW is a dual-stack mobile IPv6 (DSMIPv6, MoblieIPv6supportfordualstackHostsandRouters) protocol, the BBERF is located in the S-GW. When the trusted non-3GPP access system is connected, the BBERF is located at the trusted non-3GPP access gateway. When the UE accesses through the untrusted non-3GPP access system, the BBERF is located at the evolved packet data gateway (ePDG, EvolvedPacketDataGateway. At this time, PCEF The bearer binding function is no longer performed.

The SPR stores user policy and 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 work together to control and manage user credit in the online charging mode. The OFCS and the PCEF complete the charging operation in the offline charging mode.

The PCC system realizes the policy charging control of the IP-CAN session established by the UE for accessing a packet data network (PDN, PacketDataNetwork) through the above functional entities. The PCC system makes possible multi-level and multi-latitude billing for users. For online charging, when the UE accesses through the access network, the PCEF interacts with the OCS to perform credit control. The PCEF provides bearer layer charging information to the charging system, and is identified by an access network charging identifier (Access-Network-Charging-Identifier, also called bearer layer charging identifier). At the same time, the application server also provides application layer charging information to the charging system, which is identified by an application function charging identifier (AF-Charging-Identifier), which is generated by the AF and sent to the relevant application server. AF itself can also provide application layer charging information to the charging system, which is also identified by AF-Charging-Identifier. The charging information generated by the AF or the application server is the application layer charging information. The charging ID of the access network is reported to the AF and other application servers through the PCRF, and the charging information of the application layer includes the charging ID of the bearer layer. The charging system of the bearer layer generated through the PCEF includes the application function charging identifier. In this way, the billing system can associate the billing information of the user at two levels through the two billing identifiers, thereby realizing multi-level and multi-dimensional billing for user access services.

However, in existing network applications, there is no AF in many scenarios. Session-based services such as IP Multimedia Subsystem (IMS, IMSIPMultimediaSubsystem) can use Initial Session Protocol (SIP, SIPSessionInitiationProtocol, which is an application-layer signaling control protocol) signaling for session service layer negotiation (such as codec mode, media type, required bandwidth, etc.), P-CSCF (that is, AF in the PCC system) notifies the PCRF of the negotiated service information, and the PCRF performs QoS authorization. However, there are a large number of non-conversational services in the existing network, such as the current application of IP-based voice (VoIP, VoiceOverInternetProtocol), Internet Protocol Television (IPTV, IPTVInternetProtocolTelevision), video-on-demand (VoD, VODVideo-On-Demand), online games and other services The media negotiation at the application layer and the process of sending service information to the PCRF will not be performed.

Contents of the invention

In view of this, the main purpose of the present invention is to provide an enhanced policy and charging control method and system, as well as a PCC system, which can implement policy and charging control for non-conversational services, and can especially perform four-layer above billing operations.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A method for enhanced policy and charging control, in which a business detection executive function entity TDEF is set in a policy and charging control PCC system; the method includes:

The TDEF implements charging control according to the service execution rules formulated by the policy and charging rule functional entity PCRF.

Preferably, the method also includes:

When the PCRF formulates the PCC rules, after determining that the business data flow matching the PCC rules is controlled by more than four layers of policy and charging, it formulates the business execution rules and sends them to the TDEF;

When the PCRF sends the PCC rule to the policy and control executive function entity PCEF, it instructs to control the business data flow matching the PCC rule to control the policy and charging above four layers;

The TDEF controls the charging of the service data flow above four layers, and provides corresponding charging information to the charging system.

Preferably, the method also includes:

When the TDEF detects a service that has not been reported to the PCRF before in the service data flow according to a service detection rule, report the service that has not been reported to the PCRF to the PCRF;

The PCRF formulates PCC rules for the services that have not been reported to the PCRF, and at the same time determines that the business data flows that match the PCC rules are controlled by layer 4 or above policies and charging, and then formulates business execution rules and sends to said TDEF;

The TDEF requests new credits from the online charging system and/or returns the remaining credits, and performs online charging above four layers for the services detected by the TDEF.

Preferably, the method also includes:

When the TDEF detects a service that has not been reported to the PCRF before in the service data flow according to the service detection rule, assign an application charging identifier to the service that has not been reported to the PCRF before, and send it to The PCRF.

Preferably, the method also includes:

When receiving the service reported by the TDEF that has not been reported to the PCRF before, the PCRF assigns an application charging identifier to the service that has not been reported to the PCRF before, and sends it to the TDEF.

Preferably, the method also includes:

The PCRF sends the application charging identifier corresponding to the PCC rule to the PCEF;

The PCEF reports the 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 bearer charging information to realize offline charging of services.

Preferably, the method also includes:

The PCRF sends the access network charging identifier corresponding to the service execution rule to the TDEF;

The TDEF reports the access network charging identifier, the application charging identifier and application charging information to the offline charging system;

The offline charging system saves the access network charging identifier, the application charging identifier and the application charging information, so as to realize offline charging of services.

Preferably, 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.

Preferably, the charging system includes an online charging system OCS and an offline charging system OFCS, the TDEF is connected to the OCS through a Gy interface, and the TDEF is connected to the OFCS through a Gz interface.

A PCC system, including a user subscription database SPR, AF, PCRF, BBERF, PCEF and a charging system, 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 also includes a TDEF, connected to the PCRF and the charging system respectively; the TDEF executes charging control according to the service execution rules formulated by the policy and charging rule functional entity PCRF.

Preferably, the TDEF is connected to the PCRF through an Sx interface.

Preferably, the charging system includes an online charging system OCS and an offline charging system OFCS, the TDEF is connected to the OCS through a Gy interface, and the TDEF is connected to the OFCS through a Gz interface.

An enhanced policy and charging control system, including a setting unit, a formulation unit and an execution unit; wherein:

A setting unit for setting TDEF in the PCC system;

A formulating unit, used to formulate PCC rules, business detection rules and business execution rules;

The execution unit is configured to execute charging control according to the service execution rules formulated by the PCRF.

Preferably, the system further includes a determining unit, a first sending unit, a second sending unit, and a charging and providing unit, wherein:

The determination unit is configured to trigger the formulation unit to further formulate service execution rules after determining that the business data flow matching the PCC rule is controlled by layer 4 or above policy and charging when the formulation unit formulates the PCC rule;

a first sending unit, configured to send the service detection rule or/and service execution rule to the TDEF;

The second sending unit is configured to send the PCC rule to the PCEF, and instruct to control the policy and charging above layer 4 on the service data flow matching the PCC rule;

The billing and providing unit is used to control the billing of the service data flow above layer 4, and provide corresponding billing information to the billing system.

Preferably, the system further includes a detection unit and a reporting unit, wherein:

The detection unit is configured to detect the service data flow according to the service detection rule, and trigger the reporting unit when detecting a service that has not been reported to the PCRF before;

a reporting unit, configured to report to the PCRF the services that have not been reported to the PCRF;

The formulating unit formulates PCC rules for the services that have not been reported to the PCRF, and the determining unit further determines that when the business data flow that matches the PCC rules is controlled by layer 4 or above policies and charging, the The formulating unit formulates service execution rules, and sends them to the TDEF by the first sending unit.

Preferably, the system also includes:

The first allocating unit is configured to assign an application charging identifier to a service that has not been reported to the PCRF before detected by the detection unit; the reporting unit further reports the application charging identifier to the PCRF.

Preferably, the system also includes:

The second allocating unit is configured to allocate an application charging identifier to the service reported by the TDEF that has not been reported to the PCRF before, and send it to the TDEF by the first sending unit.

Preferably, the second sending unit sends the application charging identifier corresponding to the PCC rule to the PCEF;

The PCEF provides the 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 carry charging information to realize offline charging of services.

Preferably, the system also includes:

The first sending unit 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 application charging information to the offline charging system; the offline charging system stores the access network charging identifier, the application charging identifier and the application charging information to realize offline charging of services.

Preferably, 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.

In the present invention, a traffic detection function (TDF, TrafficDetectionFunction) is added in the current PCC system to detect the information of more than four layers of traffic data flow, so that the business information provided to the PCRF will be more abundant, which is beneficial for the PCRF to carry out policy decisions. It can realize the charging operation of the business above four layers, so as to realize the multi-level and multi-latitude charging control of the business data.

Description of drawings

FIG. 1 is a schematic diagram of a Rel-8PCC non-roaming architecture of related technologies;

Fig. 2 is the composition structure schematic diagram of PCC system of the present invention;

FIG. 3 is a flow chart of Embodiment 1 of the enhanced policy and charging control method of the present invention;

FIG. 4 is a flow chart of Embodiment 2 of the enhanced policy and charging control method of the present invention;

FIG. 5 is a flow chart of Embodiment 3 of the enhanced policy and charging control method of the present invention;

FIG. 6 is a schematic diagram of the composition and structure of the enhanced policy and charging control system of the present invention;

FIG. 7 is a schematic diagram of another composition structure of the enhanced policy and charging control system of the present invention;

FIG. 8 is a schematic diagram of the second composition structure of the enhanced policy and charging control system of the present invention.

detailed description

The basic idea of the present invention is: in the current PCC system, add traffic detection function (TDF, TrafficDetectionFunction), realize the information of the business data flow above four layers is detected, will be more abundant to provide business information to PCRF like this, be conducive to PCRF to carry out Policy decision-making can realize the charging operation on the business layer above four, so as to realize the multi-level and multi-latitude charging control on the business data.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

Figure 2 is a schematic diagram of the composition structure of the PCC system of the present invention, as shown in Figure 2, the PCC system of the present invention is formed by adding TDEF to the PCC system shown in Figure 1, specifically, TDEF is set between the billing system and the PCRF , the TDEF is connected to the PCRF through the Sx interface, connected to the OCS through the Gy interface, and connected to the OFCS through the Gz interface. The main functions of TDEF include:

1. Execute service data message detection according to the message detection rules issued by PCRF (rules of policies and charging control above layer 4), and analyze and detect data packets above layer 4;

2. Report the detected business information to PCRF;

3. Gate control and QoS policy execution based on more than four layers of filters;

4. Report billing information to the billing system (OCS/OFCS)

5. Report to the PCRF the request for modification of bearer layer resources;

6. Report the events subscribed by PCRF.

Based on the PCC system shown in FIG. 2 , the specific implementation manner of the enhanced policy and charging control method of the present invention will be further explained in detail below.

Embodiment one

Fig. 3 is the flow chart of the method embodiment one of the strategy of the present invention enhancement and billing control, and as shown in Fig. 3, what this embodiment describes is IP-CAN session establishment process, and specific steps are as follows:

In step S301, the gateway where the BBERF resides receives an IP-CAN session establishment request message, which carries information such as user ID and PDN ID.

In step S302, the BBERF sends a gateway control session establishment request message to the PCRF, and the message carries user identification, PDN identification and other information. This message is used to request the establishment of a gateway control session.

Step S303, if the PCRF has no subscription information related to the user, the PCRF sends a subscription document request message to the SPR, and the message carries the user ID and PDN ID, etc. If there is user-related subscription information stored in the PCRF, step S305 is directly executed to formulate a corresponding strategy according to the subscription information.

In step S304, the SPR returns the subscription information of the user according to the user ID and the PDN ID, including whether service detection is required and the service to be detected.

In step S305, the PCRF formulates a default policy according to the subscription information returned by the SPR, including PCC rules and corresponding QoS rules. If service detection is required, the PCRF formulates service detection rules according to the services that need to be detected. Business detection rules usually include more than four layers of filters. If the issued PCC rule also needs to further implement more than four layers of policy and charging control, then PCRF will also customize the corresponding rules for carrying out four or more layers of policy and charging control on business data flows (in the present invention, the rule called business execution rules). Optionally, the PCRF may also formulate event triggers.

In step S306, the PCRF returns a gateway control session establishment confirmation message to the BBERF, and the message carries QoS rules, event triggers, and the like. BBERF installs QoS rules and event triggers.

In step S307, the gateway where the BBERF resides sends an IP-CAN session establishment request message to the gateway where the PCEF resides, and the message carries information such as user identification and PDN identification.

In the present invention, step S307 can be executed simultaneously with step S302.

In step S308, the gateway where the PCEF resides allocates an IP address and an access network charging identifier for the IP-CAN session requested by the UE to be established. The PCEF sends an IP-CAN session establishment instruction message to the PCRF, and the message carries information such as user ID, PDN ID, IPAddress, and access network charging ID. This message is used to request the establishment of a Gx session.

In step S309, the PCRF associates the request to establish the gateway control session in step S302 with the Gx session requested in step S308 according to the user identifier and the PDN identifier. The PCRF returns the PCC rule formulated in step S304, the event trigger and the address of the TDEF selected for the IP-CAN session to the PCEF. For each PCC rule, PCRF will also send policy and charging control instructions to PCEF whether filtering above layer 4 is required. If necessary, PCEF will forward the service data flow matching the PCC rule to 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 relevant input information for OCS to make a decision. The input information includes user ID and other information. The online charging session is used for online charging at the bearer layer (below layer 4).

In 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 OCS, the gateway where PCEF resides returns an IP-CAN session establishment response message to the gateway where BBERF resides, carrying the IP-CAN session IPAddress.

Step S313, the gateway where the BBERF resides returns an IP-CAN session establishment response message, carrying the IP address of the IP-CAN session.

In step S314, the PCRF sends a service detection session establishment request message to the selected TDEF, and the message carries the user ID, PDN ID, IPAddress of the IP-CAN session and the access network charging ID. The PCRF will also provide the TDEF with service detection rules and/or service execution rules. The request message is used to establish a service detection session.

In 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, TDEF activates the online charging session and provides relevant input information for OCS to make a decision. The input information includes user ID and other information. The online charging session is used for online charging at the application layer (layer 7).

Step S317, OCS provides possible credit information to 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 according to the user identifier.

In the present invention, the above step S314 can be executed after step S305. Step S316 can be executed immediately after step S314.

Through the above procedure, the UE establishes an IP-CAN session, and the PCRF associates the gateway control session, the Gx session, and the 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 the session association implemented in OCS, so that for those non-session services, OCS can carry out the charging association analysis between the bearer layer and the application layer.

Embodiment two

Fig. 4 is the flow chart of embodiment two of the method embodiment of the enhanced policy and billing control of the present invention, as shown in Fig. 4, this embodiment describes the IP-CAN initiated by TDEF after detecting new services according to the service detection rules Session modification process, in this process, the gateway where the BBERF resides and the gateway where the PCEF resides communicate using the PMIPv6 protocol. Specific steps are as follows:

In step S401, the TDEF detects the passing service data flow according to the service detection rules delivered by the PCRF, and detects a service that has not been reported to the PCRF before.

In step S402, the TDEF reports the detected service to the PCRF. The TDEF may report to the PCRF by reporting the identifier of the corresponding service detection rule or the identifier of the service preconfigured between the PCRF and the TDEF. At the same time, TDEF will also distribute a charging identifier for the service to identify the charging information above four layers (in the present invention, the charging identifier is called application charging identifier, and the charging information above four layers is called application charging information) and send to PCRF.

In step S403, the PCRF returns a confirmation message to the TDEF after storing the information reported by the TDEF.

In step S404, the PCRF makes a policy decision according to the subscription information, access information, network policy, and service information reported by the TDEF. PCRF policies include PCC rules and corresponding QoS rules. PCC rules include four-layer filters, and PCEF detects service data flows according to the four-layer filters, and performs policy and charging control. If the issued PCC rules need to further implement policies and charging controls above four layers, the PCRF will also customize corresponding business execution rules. The business execution rules include more than four layers of filters, so that TDEF can detect the business data flow according to the four or more layers of filters, and carry out policy and charging control. PCRF can also formulate an event trigger for event subscription to BBERF, PCEF or TDEF.

In step S405, the PCRF sends a gateway control and QoS rule provision message to the BBERF, carrying QoS rules and event triggers.

Step S406, BBERF installs QoS rules and event triggers. The gateway where BBERF is located performs QoS control according to QoS rules, and establishes, modifies or terminates the bearer.

Step S407, the BBERF returns a confirmation message to the PCRF.

In step S408, the PCRF sends a policy and charging rule provision message to the PCEF, carrying PCC rules and event triggers. For each PCC rule, PCRF will also send policy and charging control instructions to PCEF whether filtering above layer 4 is required, and if necessary, PCEF will forward the service data flow matching the PCC rule to TDEF. The PCRF will send the application charging identifier reported by the TDEF to the PCEF.

Step S409, PCEF installs PCC rules and event triggers. 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 establishment of the IP-CAN session according to the policies and charging control instructions filtered by layers above four.

Step S410, if online charging is performed, the PCEF may request new credits from the OCS for new charging keys (ChargingKeys) and/or return the remaining credits of the no longer activated ChargingKeys.

Step S411, OCS provides credit and/or confirms credit report to PCEF.

In step S412, the PCEF returns an acknowledgment message to the PCRF.

In step S413, the PCRF sends a service execution rule providing message to the TDEF to provide the service execution rule and event trigger.

Step S414, TDEF installs business execution rules and event triggers.

Step S415, if online charging is performed, TDEF requests new credits from the OCS for new charging keys (ChargingKeys) and/or returns the remaining credits of ChargingKeys that are no longer activated;

Step S416, OCS provides credit and/or confirms credit report to TDEF;

In step S417, the TDEF returns an acknowledgment message to the PCRF.

Through the above process, PCEF and TDEF perform online charging at bearer layer (below layer 4) and application layer (above layer 4) for those non-session services detected by TDEF through the credit control session established with OCS. And the TDEF sends the application charging identifier to the PCEF through the PCRF, so as to realize the charging of the service.

In the second embodiment, the TDEF allocates an application charging identifier for each newly detected service. In other embodiments, it can also be implemented by other methods:

After receiving the report of the detected new service reported by the TDEF, the PCRF allocates an application charging identifier for the service and sends it to the TDEF. At the same time, the PCRF also sends the application charging identifier to the PCEF.

Embodiment Three

Fig. 5 is a flow chart of the third embodiment of the enhanced policy and charging control method of the present invention. As shown in Fig. 5, this embodiment describes the realization of multi-level offline charging based on the first and second embodiments of PCEF and TDEF process, the specific steps are as follows:

In step S501, the gateway where the PCEF resides needs to report charging information to the OFCS upon receiving the trigger.

In step S502, the gateway where the PCEF resides reports information to the OFCS, carrying the access network charging identifier, application charging identifier and bearer charging information.

In step S503, the OFCS saves the charging information.

In step S504, the OFCS returns a confirmation message.

Step S505, the gateway where the TDEF resides needs to report charging information to the OFCS upon receiving the trigger.

In step S506, the gateway where the TDEF resides reports information to the OFCS, carrying the access network charging identifier, application charging identifier and application charging information.

In step S507, the OFCS saves the charging information.

In step S508, the OFCS returns a confirmation message.

In step S509, the OFCS associates the charging information saved in steps S507 and S508 according to the access network charging identifier and the application charging identifier, so as to implement the bearer layer (below four layers) and application layer (four layers) for non-session services. above) for offline billing.

Fig. 6 is a schematic diagram of the structure of the enhanced policy and charging control system of the present invention. As shown in Fig. 6, the enhanced policy and charging control system of the present invention includes a setting unit 601, a formulation unit 602, and an execution unit 603 , a determining unit 604, a first sending unit 605, a second sending unit 606, and a charging and providing unit 607, wherein:

A setting unit 601, configured to set TDEF in the PCC system;

A formulation unit 602, configured to formulate PCC rules, service detection rules and service execution rules;

The execution unit 603 is configured to execute charging control according to the service execution rules formulated by the PCRF.

As shown in Figure 6, 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, wherein:

The determining unit 604 is configured to trigger the formulating unit 602 to further formulate service execution rules after determining that the business data flow matching the PCC rule is controlled by four or more layers of policy and charging when the formulating unit 602 formulates the PCC rule;

The first sending unit 605 is configured to send the service detection rule or/and service execution rule to the TDEF;

The second sending unit 606 is configured to send the PCC rule to the PCEF, and instruct to control the policy and charging above four layers on the service data flow matching the PCC rule;

The billing and providing unit 607 is used to control the billing of the service data flow above layer 4, and provide corresponding billing information to the billing system.

Those skilled in the art should understand that the determining unit 604, the first sending unit 605, the second sending unit 606, and the charging and providing unit 607 are configured to optimize the technical solution of the enhanced policy and charging control system of the present invention.

Fig. 7 is a schematic diagram of the second structure of the enhanced policy and billing control system of the present invention. As shown in Fig. 7, on the basis of the enhanced policy and billing control system shown in Fig. 6, the present invention enhances The policy and charging control system further includes a detection unit 608 and a reporting unit 609, wherein,

The detection unit 608 is configured to detect the service data flow according to the service detection rule, and trigger the reporting unit 609 when detecting a service that has not been reported to the PCRF before;

A reporting unit 609, configured to report to the PCRF the services that have not been reported to the PCRF;

The formulating unit 602 formulates a PCC rule for the service that has not been reported to the PCRF, and the determining unit 604 further determines that when the service data flow that matches the PCC rule is to be controlled over four layers of policy and charging, the formulating unit 602 A service execution rule is formulated and sent to the TDEF by the first sending unit 605 .

Those skilled in the art should understand that the detection unit 608 and the reporting unit 609 are configured to optimize the technical solution of the enhanced policy and charging control system of the present invention.

Fig. 8 is a schematic diagram of the second structure of the enhanced policy and billing control system of the present invention. As shown in Fig. 8, on the basis of the enhanced policy and billing control system shown in Fig. 7, the present invention enhances The system of policy and billing controls also includes:

The first allocating unit 610 is configured to allocate an application charging identifier to a service detected by the detection unit that has not been reported to the PCRF before; the reporting unit 609 further reports the application charging identifier to the PCRF.

In order to further optimize the technical solution of the enhanced policy and charging control system of the present invention, the system further includes:

The second allocating unit 611 is configured to allocate an application charging identifier to the service reported by the TDEF that has not been reported to the PCRF before, and send it to the TDEF by the first sending unit 605 .

Preferably, the second sending unit 606 sends the application charging identifier corresponding to the PCC rule to the PCEF;

The PCEF provides the 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 carry charging information to realize 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 information; the offline charging system saves the access network charging identifier, the application charging identifier and the application charging information, so as to realize offline charging of services.

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.

Those skilled in the art should understand that the enhanced policy and charging control system shown in Figure 6, Figure 7 and Figure 8 is designed to implement the aforementioned enhanced policy and charging control method, Figure 6, Figure 7 The functions of each processing unit in the enhanced policy and charging control system shown in FIG. 8 can be understood with reference to the description of the methods shown in FIGS. And realize, also can realize through concrete logic circuit.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (18)

1. a kind of enhanced strategy and the method for charging control, in strategy and charging control PCC system, business detection executive function entity TDEF is set; It is characterized in that, described method comprises: The TDEF performs charging control according to the service execution rules formulated by the policy and charging rule functional entity PCRF; Wherein, the service execution rule is a rule formulated after the PCRF formulates the PCC rule after determining that the business data flow matching the PCC rule is controlled by more than four layers of policy and charging; the service execution rule includes Filters with more than four layers; The PCRF sends the application charging identifier corresponding to the PCC rule to the PCEF, and the PCEF reports the access network charging identifier, the application charging identifier and bearer charging information to the offline charging system; The PCRF sends the access network charging identifier corresponding to the service execution rule to the TDEF, and the TDEF reports the access network charging identifier, the application charging identifier, and the application accounting identifier to the offline charging system. fee information; 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. 2. The method according to claim 1, characterized in that the method further comprises: The PCRF sends the service execution rule to the TDEF; When the PCRF sends the PCC rule to the policy and control executive function entity PCEF, it instructs to control the business data flow matching the PCC rule to control the policy and charging above four layers; The TDEF controls the charging of the service data flow above four layers, and provides corresponding charging information to the charging system. 3. The method according to claim 1, characterized in that the method further comprises: When the TDEF detects a service that has not been reported to the PCRF before in the service data flow according to a service detection rule, report the service that has not been reported to the PCRF to the PCRF; The PCRF formulates PCC rules for the services that have not been reported to the PCRF, and at the same time determines that the business data flows that match the PCC rules are controlled by layer 4 or above policies and charging, and then formulates business execution rules and sends to said TDEF; The TDEF requests new credits from the online charging system and/or returns the remaining credits, and performs online charging above four layers for the services detected by the TDEF. 4. method according to claim 3, is characterized in that, described method also comprises: When the TDEF detects a service that has not been reported to the PCRF before in the service data flow according to the service detection rule, assign an application charging identifier to the service that has not been reported to the PCRF before, and send it to The PCRF. 5. method according to claim 3, is characterized in that, described method also comprises: When receiving the service reported by the TDEF that has not been reported to the PCRF before, the PCRF assigns an application charging identifier to the service that has not been reported to the PCRF before, and sends it to the TDEF. 6. The method according to claim 1 or 2, wherein the method further comprises: The offline charging system saves the access network charging identifier, the application charging identifier and bearer charging information to realize offline charging of services. 7. The method according to claim 1 or 2, wherein the method further comprises: The offline charging system saves the access network charging identifier, the application charging identifier and the application charging information, so as to realize offline charging of services. 8. The method according to claim 1 or 2, wherein the charging system comprises an online charging system OCS and an offline charging system OFCS, the TDEF and the OCS are connected through a Gy interface, so The TDEF is connected to the OFCS through a Gz interface. 9. A PCC system, comprising user subscription databases SPR, AF, PCRF, BBERF, PCEF and a charging system, the SPR, the AF, the BBERF and the PCEF are respectively connected to the PCRF, and the PCEF Connected to the billing system; characterized in that the PCC system also includes a TDEF, respectively connected to the PCRF and the billing system; the TDEF is based on the business execution rules formulated by the policy and charging rule functional entity PCRF Execution of billing controls; Wherein, the service execution rule is a rule formulated after the PCRF formulates the PCC rule after determining that the business data flow matching the PCC rule is controlled by more than four layers of policy and charging; the service execution rule includes Filters with more than four layers; The PCRF sends the application charging identifier corresponding to the PCC rule to the PCEF, and the PCEF reports the access network charging identifier, the application charging identifier and bearer charging information to the offline charging system; The PCRF sends the access network charging identifier corresponding to the service execution rule to the TDEF, and the TDEF reports the access network charging identifier, the application charging identifier, and the application accounting identifier to the offline charging system. fee information; 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. 10. The PCC system according to claim 9, characterized in that, the TDEF and the PCRF are connected through an Sx interface. 11. The PCC system according to claim 9 or 10, wherein 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, The TDEF is connected to the OFCS through a Gz interface. 12. An enhanced policy and billing control system, characterized in that it includes a setting unit, a formulation unit, an execution unit, a first sending unit, and a second sending unit; wherein: A setting unit for setting TDEF in the PCC system; A formulating unit, used to formulate PCC rules, business detection rules and business execution rules; An execution unit, configured to execute charging control according to the business execution rules formulated by the formulation unit; Wherein, the business execution rule is a rule formulated by the formulating unit after determining that the business data flow matching the PCC rule is controlled by more than four layers of policy and charging when formulating the PCC rule; the business execution rule includes four Filters above layers; The second sending unit sends the application charging identifier corresponding to the PCC rule to the PCEF, and the PCEF provides the access network charging identifier, the application charging identifier and bearer charging information to the offline charging system ; The first sending unit sends the application charging identifier corresponding to the service execution rule to the TDEF, and the TDEF reports the access network charging identifier, the application charging identifier and the application charging identifier to the offline charging system information; 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. 13. The system according to claim 12, characterized in that the system further comprises a determination unit, a first sending unit, a second sending unit, and a charging and providing unit, wherein: The determination unit is configured to trigger the formulation unit to further formulate service execution rules after determining that the business data flow matching the PCC rule is controlled by layer 4 or above policy and charging when the formulation unit formulates the PCC rule; a first sending unit, configured to send the service detection rule or/and service execution rule to the TDEF; The second sending unit is configured to send the PCC rule to the PCEF, and instruct to control the policy and charging above layer 4 on the service data flow matching the PCC rule; The billing and providing unit is used to control the billing of the service data flow above layer 4, and provide corresponding billing information to the billing system. 14. The system according to claim 13, further comprising a detection unit and a reporting unit, wherein: The detection unit is configured to detect the service data flow according to the service detection rule, and trigger the reporting unit when detecting a service that has not been reported to the PCRF before; a reporting unit, configured to report to the PCRF the services that have not been reported to the PCRF; The formulating unit formulates PCC rules for the services that have not been reported to the PCRF, and the determining unit further determines that when the business data flow that matches the PCC rules is controlled by layer 4 or above policies and charging, the The formulating unit formulates service execution rules, and sends them to the TDEF by the first sending unit. 15. The system according to claim 14, further comprising: The first allocating unit is configured to assign an application charging identifier to a service that has not been reported to the PCRF before detected by the detection unit; the reporting unit further reports the application charging identifier to the PCRF. 16. The system according to claim 13, further comprising: The second allocating unit is configured to allocate an application charging identifier to the service reported by the TDEF that has not been reported to the PCRF before, and send it to the TDEF by the first sending unit. 17. The system according to claim 12 or 13, wherein the offline charging system saves the access network charging identifier, the application charging identifier and bearer charging information to realize offline charging of services fee. 18. The system according to claim 12 or 13, wherein the offline charging system saves the access network charging identifier, the application charging identifier and the application charging information to realize service Offline billing.