WO2016150129A1 - 策略控制和计费控制会话的关联方法和装置 - Google Patents

策略控制和计费控制会话的关联方法和装置 Download PDF

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Publication number
WO2016150129A1
WO2016150129A1 PCT/CN2015/090176 CN2015090176W WO2016150129A1 WO 2016150129 A1 WO2016150129 A1 WO 2016150129A1 CN 2015090176 W CN2015090176 W CN 2015090176W WO 2016150129 A1 WO2016150129 A1 WO 2016150129A1
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pcrf
user equipment
policy
pcef
identifier
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PCT/CN2015/090176
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English (en)
French (fr)
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丰孝英
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中兴通讯股份有限公司
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Publication of WO2016150129A1 publication Critical patent/WO2016150129A1/zh

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    • 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

Definitions

  • This document relates to the technical field of association of policy control and charging control sessions, and in particular, to a method and apparatus for association of policy control and charging control sessions.
  • a policy control and charging control (Policy and Charging Control Function) is introduced in the network.
  • the Policy and Charging Rules Function (PCRF) is used through the interface Rx and the carrier.
  • the IP service network is connected to obtain the service information.
  • the PCRF is connected to the packet data network (PGW) of the packet data network (PGW) through the Gx interface.
  • the PCRF is responsible for initiating the establishment of the IP bearer and ensuring the quality of service data Qos (Quality of service). ) and perform billing control.
  • the PGW is responsible for the execution of the policy and charging rules, that is, the PCEF (Policy and Charging Enforcement Function) function.
  • a Gx session is established between the PGW (PCEF) and the PCRF.
  • PCEF PGW
  • the Rx session of the user equipment is established between the Policy Agent (PA) and the PCRF and the service information is established.
  • PA Policy Agent
  • the PCRF is transmitted to the PCRF, and the PCRF makes decisions based on the information such as the service, generates control and charging rules suitable for the user, and sends the control to the PCEF through the Gx interface, which is executed by the PCEF to provide differentiated services for the user.
  • the PCRF can associate the Gx session with the Rx session to generate policy rules and charging rules applicable to the user. Otherwise, the PCC control process cannot be completed. .
  • a DRA (Diameter Routing Agent) device is implemented, that is, a PCC session association of the same user is implemented by the same pair of DRA devices on the Gx interface and the Rx interface.
  • the DRA device may not be deployed. How to associate the PCC session is an urgent problem to be solved.
  • the technical problem to be solved by the present invention is to provide a method and a device for associating a policy control and a charging control session, so as to implement association of a PCC session when multiple PCRFs exist in the network and the DRA device is not deployed.
  • a method for associating policy control and charging control sessions including:
  • the policy and charging rule function PCEF acquires the policy and charging rule function PCRF of the user equipment, and sends the PCRF to the policy agent, wherein the PCRF is used to establish a Gx session of the user equipment.
  • the step of sending, by the PCEF, the PCRF to the policy proxy includes:
  • the PCEF Upon receiving the service access request, the PCEF adds the identifier of the PCRF to the service access request, and sends the service access request including the identifier of the PCRF to the policy proxy.
  • the step of adding, by the PCEF, the identifier of the PCRF to the service access request includes:
  • the PCEF adds the identifier of the PCRF in an optional field of the packet header in the packet of the service access request.
  • the step of the PCEF acquiring the PCRF of the user equipment includes:
  • the PCEF selects the PCRF for the user equipment according to load information of each PCRF.
  • the PCEF determines, according to the identifier of the user equipment, a PCRF corresponding to the user equipment from a preset relationship between the user equipment and the PCRF.
  • the step of the PCEF acquiring the PCRF of the user equipment includes:
  • the PCEF acquires a PCRF of the user equipment.
  • a method for associating policy control and charging control sessions including:
  • the policy agent obtains a policy and charging rule function PCRF, where the PCRF is used to establish a Gx session of the user equipment;
  • the policy agent establishes an Rx session with the PCRF of the user equipment.
  • the step of the policy agent acquiring the PCRF includes:
  • the policy agent receives a service access request sent by the policy and charging rule function PCEF, where the service request message includes an identifier of the PCRF;
  • the policy agent determines the PCRF according to the identifier of the PCRF in the service access request.
  • the step of determining, by the policy agent, the PCRF according to the identifier of the PCRF in the service access request includes:
  • the policy agent acquires location information of a field in which the identifier of the PCRF is stored in the service access request;
  • the policy agent obtains the identifier of the PCRF from the service access request according to the location information.
  • a policy and charging rule function PCEF entity includes a first acquiring module and a sending module, wherein:
  • the first obtaining module is configured to: acquire a policy and charging rule function PCRF of the user equipment, where the PCRF is used to establish a Gx session of the user equipment;
  • the sending module is configured to: send the PCRF to a policy agent.
  • the sending module includes an adding unit and a sending unit, where:
  • the adding unit is configured to: when the service access request is received, identify the PCRF Add to the business access request;
  • the sending unit is configured to: send the service access request including the identifier of the P CRF to the policy agent.
  • the adding unit is configured to add the identifier of the PCRF to the service access request as follows:
  • the first obtaining module is configured to acquire the PCRF of the user equipment as follows:
  • the first obtaining module is configured to acquire the PCRF of the user equipment as follows:
  • the PCEF acquires a PCRF of the user equipment.
  • the PCEF entity is located in a gateway device PGW of the packet data network.
  • a policy agent includes a second acquisition module and an establishment module, wherein:
  • the second obtaining module is configured to: obtain a policy and charging rule function PCRF, where the PCRF is used to establish a Gx session of the user equipment;
  • the establishing module is configured to establish an Rx session of the user equipment with the PCRF.
  • the second obtaining module includes a receiving unit and a determining unit, where:
  • the receiving unit is configured to: receive a service access request sent by the policy and charging rule function PCEF, where the service request message includes an identifier of the PCRF;
  • the determining unit is configured to: determine the PCRF according to the identifier of the PCRF in the service access request.
  • the determining unit includes a first acquiring subunit and a second acquiring subunit, where:
  • the first obtaining subunit is configured to: obtain location information of a field in which the identifier of the PCRF is stored in the service access request;
  • the second obtaining subunit is configured to: obtain the identifier of the PCRF from the service access request according to the location information.
  • An association system for policy control and charging control sessions comprising: a policy and charging rule function PCRF, any of the foregoing policy and charging rule functions PCEF and any of the above-mentioned policy agents, wherein:
  • the PCRF is configured to associate the established Gx session of the user equipment with the policy agent and the Rx session established by the PCRF.
  • An association system for policy control and charging control sessions comprising: a policy and charging rule function PCEF, a policy agent, and a policy and charging rule function PCRF, wherein: the PCEF is used to obtain a policy and charging rule function
  • the PCRF sends the PCRF corresponding to the user equipment to the policy proxy, where the PCRF is used to establish a Gx session of the user equipment, and the policy proxy is used to obtain a policy and charging rule function PCRF, where the PCRF is used by the PCRF.
  • the PCEF is specifically configured to: when receiving the service access request, add the identifier of the PCRF to the service access request, and send a service access request including the identifier of the PCRF to the policy proxy; the policy proxy Specifically, the method is configured to: receive a service access request sent by the PCEF, where the service request message includes an identifier of the PCRF, and determine the PCRF according to the identifier of the PCRF in the service access request.
  • the PCEF is specifically configured to: add the identifier of the PCRF in an optional field of the packet header in the packet of the service access request.
  • the policy agent is specifically configured to: obtain location information of a field in which the identifier of the PCRF is stored in the service access request, and obtain an identifier of the PCRF from the service access request according to the location information.
  • the PCEF is specifically configured to: select a PCRF for the user equipment according to the load information of each PCRF; or determine, according to the identifier of the user equipment, a preset relationship between the user equipment and the PCRF.
  • the PCRF corresponding to the user equipment.
  • the PCEF is specifically configured to: when detecting that the user equipment is online or the device establishes a packet data network PDN connection, select the PCRF.
  • the PCEF is located in the gateway device PGW of the packet data network.
  • the present invention provides an embodiment.
  • the PCEF selects a PCRF that is suitable for the user equipment, and carries the selected PCRF identifier to the PA.
  • the PA selects the same PCRF to establish an Rx session of the user equipment, and implements the same
  • the Gx and Rx sessions are performed on the PCRF, which solves the problem of PCC session association in the related art.
  • FIG. 1 is a flowchart of a method for associating a policy control and a charging control session according to the present invention
  • FIG. 2 is a flowchart of another method for associating a policy control and charging control session provided by the present invention
  • FIG. 3 is a schematic diagram of a multiple PCRF deployment system according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a PCC session association method in a multiple PCRF deployment system according to an embodiment of the present invention
  • FIG. 5 is an interaction diagram of an application example of a method for associating a policy control and a charging control session according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a PCEF entity according to an embodiment of the present invention.
  • FIG. 7 is a structural diagram of a policy proxy according to an embodiment of the present invention.
  • FIG. 8 is a structural diagram of an association system of a policy control and a charging control session according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for associating a policy control and a charging control session according to an embodiment of the present invention.
  • the method shown in Figure 1 includes:
  • Step 101 The PCEF acquires a PCRF, where the PCRF is used to establish a PCRF used by a Gx session of the user equipment.
  • Step 102 The PCEF sends a PCRF corresponding to the user equipment to the PA.
  • the PCEF selects a PCRF that is suitable for the user equipment, and carries the selected PCRF identifier to the PA, so that the PA selects the same PCRF to establish an Rx session of the user equipment, and implements The Gx and Rx sessions are performed on the same PCRF, which solves the problem of PCC session association in the related art.
  • FIG. 2 is a flowchart of another method for associating a policy control and charging control session according to an embodiment of the present invention.
  • the method shown in Figure 2 includes:
  • Step 201 The PA acquires a PCRF, where the PCRF is used to establish a PCRF used by a Gx session of the user equipment.
  • Step 202 The PA establishes an Rx session of the user equipment with the PCRF.
  • the PA acquires the PCRF used by the user equipment to establish a Gx session, and selects the same PCRF to establish an Rx session of the user equipment, and implements the same PCRF.
  • the Gx and Rx sessions solve the problem of PCC session association in the related art.
  • the identifier of the PCRF may be sent to the PA through a newly defined message, or may be transmitted by using a message in the process of communication between the PCEF and the PA.
  • the PCEF Upon receiving the service access request, the PCEF adds an identifier of the PCRF used to establish the Gx session of the user equipment to the service access request, and sends a service access request including the identifier of the PCRF to the PA.
  • the PA acquires a PCRF used to establish a Gx session of the user equipment, including:
  • the embodiment of the present invention uses the service access request in the communication process between the PCEF and the PA, and the service access request carries the identifier of the PCRF, so that both the PCEF and the PA know which PCEF to use to establish a corresponding session, without modifying the relevant Adding new messages to the protocol is simple and convenient.
  • the PCEF adds the identifier of the PCRF to the service access request, including:
  • the PCEF adds the identifier of the PCRF in an optional field of the packet header in the packet of the service access request.
  • the optional field of the packet header is usually a blank field, and the blank field is fully utilized to transmit the identification information of the PCRF, and the field resources of the packet are fully utilized, thereby improving resource utilization.
  • the determining, by the policy agent, the PCRF according to the identifier of the PCRF in the service access request including:
  • the policy agent acquires location information of a field in which the identifier of the PCRF is stored in the service access request;
  • the policy agent obtains the identifier of the PCRF from the service access request according to the location information.
  • the location information may be a location where the policy agent negotiates with the PCEF, and each time the identifier of the PCRF is sent, the PCEF notifies the policy agent to store the location information of the PCRF identifier information.
  • the PCEF can select a PCEF for establishing a Gx session for each user equipment in advance, or To allocate a corresponding PCEF to the user equipment when the user equipment needs to establish a Gx session.
  • the PCEF acquires the PCRF, including:
  • the PCEF selects the PCRF when it is detected that the user equipment is online or the device establishes a packet data network PDN connection.
  • the user equipment When the user equipment is online or the device establishes a packet data network PDN connection, it can be determined that the user equipment needs to establish a Gx session, and therefore, the corresponding PCRF is allocated to the user equipment, and the corresponding PCRF is pre-configured to ensure the resources on the PCRF. Reasonable use.
  • the PCEF located on the user side selects the PCRF suitable for the user, and carries the selected PCRF identifier to the PA.
  • the PA selects the same PCRF to establish the Rx session of the user equipment.
  • the PCRF performs Gx and Rx session associations.
  • FIG. 3 is a schematic diagram of a multiple PCRF deployment system according to an embodiment of the present invention.
  • the multi-PCRF deployment system includes a PCEF unit 100, a plurality of PCRFs 200_1, ..., 200_m (where m is an integer greater than or equal to 2), and a PA unit 300.
  • the PCEF 100 located on the user side usually resides in the gateway device, in the case of GPRS, in the GGSN (Gateway GPRS Support Node), and in the case of LTE, in the PGW (PDN Gateway).
  • the PCEF 100 selects a suitable PCRF to establish a Gx session for the user's PDN connection, and the PCEF 100 pre-sets the policy of selecting the PCRF, for example, according to the APN information, or according to the IMSI/MSISDN, or according to the PCRF load.
  • the PCEF 100 carries the identifier of the selected PCRF to the PA300 through the service request packet; thus, the PCEF 100 and the PA300 select the same PCRF for the same PDN of the same user, so that the selected PCRF can perform the Gx session and The association of the Rx session.
  • the method also simplifies the process of selecting PCRF by PA. If PCEF and PA select PCRF, the selection strategy is completely consistent, otherwise the selected PCRFs are not the same.
  • FIG. 4 is a flowchart of a PCC session association method in a multiple PCRF deployment system according to an embodiment of the present invention. The process shown in Figure 4 includes:
  • Step 401 When the user goes online or the PDN connection is established, the PCEF selects an appropriate PCRF according to the preset policy, and establishes a Gx session with the selected PCRF. On the other hand, step 401 also includes A scenario in which a Gx session is established is triggered when a user requests a service access.
  • Step 402 After the PCEF selects the PCRF, the PCRF identifier is saved in the context.
  • the PCEF acquires the PCRF, including:
  • the PCEF selects a PCRF for the user equipment according to load information of each PCRF;
  • the PCEF determines, according to the identifier of the user equipment, a PCRF corresponding to the user equipment from a preset relationship between the user equipment and the PCRF.
  • the PCEF obtains the load information of each RCRF according to the preset load balancing processing policy, and selects the PCRF with the smallest load as the PCRF corresponding to the user equipment; or, according to the number sequence of the PCRF, sequentially allocates each PCRF.
  • a user equipment when the PCRF is selected for the user equipment, obtains the number N of the last selected PCRF, and the number of the PCRF allocated to the user equipment is N+1.
  • the corresponding PCRF may be pre-allocated for each user equipment.
  • the user equipment corresponding to each PCRF is set, and the identifier of the user equipment is searched to determine the PCRF corresponding to the user equipment.
  • Step 403 The PCEF receives and parses the user service access request, and inserts the selected PCRF identifier saved in step 402 into the service access request message; for the IMS service, inserts the PCRF identifier into the SIP signaling packet; for the non-IMS service , the PCRF identifier is inserted into the HTTP message.
  • Step 404 The PCEF sends a user service access request message carrying the selected PCRF identifier to the PA.
  • Step 405 The PA receives the user service access request message, parses the PCRF identifier selected by the PCEF, and establishes an Rx session of the user equipment with the selected PCRF.
  • Step 406 The selected PCRF is associated with the Gx session and the Rx session, and the control and charging rules are formulated according to the information of the Rx session, and are sent to the PCEF through the Gx interface, and the PCEF performs the control and charging policy to provide the user with the QOS guarantee.
  • the application example provided by the present invention is that when a plurality of PCRFs are not deployed and the DRA device is not deployed, the PCEF selects a PCRF suitable for the user equipment, and carries the selected PCRF identifier to the PA, and the PA selects the same PCRF to establish an Rx session of the user equipment, and implements the same Gx and Rx sessions on a PCRF to resolve The problem of PCC session association in the related art.
  • FIG. 5 is an interaction diagram of an application example of a method for associating a policy control and a charging control session provided by the present invention.
  • the method shown in Figure 5 includes:
  • Step 510 The user equipment sends information about the user online or PDN connection establishment to the PCEF.
  • Step 520 The PCEF selects a suitable PCRF for the user equipment.
  • a PCRF or the like is selected for the user equipment according to the numbering sequence of the PCRF.
  • Step 530 The PCEF establishes a Gx session by using a CCR-I (Credit Control Request initial)/CCA-I (Credit Control Answer initial).
  • CCR-I Clear Control Request initial
  • CCA-I Clear Control Answer initial
  • Step 540 The user equipment sends a data packet to the PCEF.
  • Step 550 The PCEF adds the PCER identifier corresponding to the user equipment to the received data packet, and sends the data packet including the PCRF identifier to the PA.
  • Step 560 After receiving the data packet, the PA reads the PCRF identifier from the data packet, and establishes an Rx session with the device indicated by the PCRF identifier.
  • Step 570 The PCRF performs session association for the Gx session and the Rx session of the same user equipment.
  • the application example provided by the present invention is that when a plurality of PCRFs are not deployed and the DRA device is not deployed, the PCEF selects a PCRF suitable for the user equipment, and carries the selected PCRF identifier to the PA, and the PA selects the same PCRF to establish an Rx session of the user equipment, and implements the same
  • the Gx and Rx sessions are performed on one PCRF, which solves the problem of PCC session association in the related art.
  • FIG. 6 is a schematic diagram of a PCEF entity according to an embodiment of the present invention.
  • the structure shown in Figure 6 includes:
  • the first obtaining module 601 is configured to: acquire a PCRF, where the PCRF is used to establish a PCRF used by a Gx session of the user equipment;
  • the sending module 602 is configured to: send the PCRF corresponding to the user equipment to the policy proxy.
  • the sending module 602 includes:
  • Adding a unit configured to: when receiving the service access request, add the identifier of the PCRF to the service access request;
  • the sending unit is configured to: send a service access request including the identifier of the PCRF to the policy agent.
  • the adding unit is specifically configured to: add the identifier of the PCRF in an optional field of the packet header in the packet of the service access request.
  • the first obtaining module 601 is specifically configured to: select a PCRF for the user equipment according to load information of each PCRF; or, according to the identifier of the user equipment, correspond to a preset user equipment and a PCRF. In the relationship, the PCRF corresponding to the user equipment is determined.
  • the first obtaining module 601 is specifically configured to: when detecting that the user equipment is online or the device establishes a packet data network PDN connection, the PCEF selects the PCRF.
  • the PCEF entity is located in a gateway device PGW of the packet data network.
  • the PCEF selects a PCRF that is suitable for the user equipment, and carries the selected PCRF identifier to the PA, so that the PA selects the same PCRF to establish an Rx session of the user equipment, and implements The Gx and Rx sessions are performed on the same PCRF, which solves the problem of PCC session association in the related art.
  • FIG. 7 is a structural diagram of a policy proxy according to an embodiment of the present invention.
  • the structure shown in Figure 7 includes:
  • the second obtaining module 701 is configured to: acquire a PCRF, where the PCRF is used to establish a PCRF used by a Gx session of the user equipment;
  • the establishing module 702 is configured to: establish an Rx session of the user equipment with the PCRF.
  • the second obtaining module 701 includes:
  • the receiving unit is configured to: receive a service access request sent by the policy and charging rule function PCEF, where the service request message includes an identifier of a PCRF used to establish a Gx session of the user equipment;
  • the determining unit is configured to: determine, according to the identifier of the PCRF in the service access request, a PCRF used to establish a Gx session of the user equipment.
  • the determining unit comprises:
  • a first acquiring subunit configured to: obtain location information of a field in which the identifier of the PCRF is stored in the service access request;
  • the second obtaining subunit is configured to: obtain the identifier of the PCRF from the service access request according to the location information.
  • the PA acquires the PCRF used by the user equipment to establish a Gx session, and selects the same PCRF to establish an Rx session of the user equipment, so as to perform Gx on the same PCRF.
  • the Rx session solves the problem of PCC session association in the related art.
  • FIG. 8 is a structural diagram of an association system of a policy control and a charging control session according to an embodiment of the present invention.
  • the system shown in FIG. 8 includes: a policy and charging rule function PCEF, a policy agent, and a policy and charging rule function PCRF, where:
  • the PCEF is configured to: obtain a policy and charging rule function PCRF, and send a PCRF corresponding to the user equipment to the policy proxy, where the PCRF is used to establish a Gx session of the user equipment;
  • the policy proxy is configured to: obtain a policy and charging rule function PCRF, where the PCRF is used to establish a Gx session of the user equipment, and establish an Rx session of the user equipment with the PCRF;
  • the PCRF is configured to associate a Gx session and an Rx session of the user equipment.
  • the PCEF is specifically configured to: when receiving the service access request, add the identifier of the PCRF to the service access request, and send the service access request including the identifier of the PCRF to the policy proxy;
  • the policy agent is specifically configured to: receive a service access request sent by the policy and charging rule function PCEF, where the service request message includes an identifier of the PCRF, and determines the identifier according to the identifier of the PCRF in the service access request. PCRF.
  • the PCEF is specifically configured to: add the identifier of the PCRF in an optional field of the packet header in the packet of the service access request.
  • the determining unit includes:
  • the policy proxy is specifically configured to: obtain a label for storing the PCRF in the service access request The location information of the identified field, and obtaining the identifier of the PCRF from the service access request according to the location information
  • the PCEF is specifically configured to: select a PCRF for the user equipment according to the load information of each PCRF; or determine, according to the identifier of the user equipment, from a correspondence between the preset user equipment and the PCRF, The PCRF corresponding to the user equipment.
  • the PCEF is specifically configured to: when detecting that the user equipment is online or the device establishes a packet data network PDN connection, the PCEF selects the PCRF.
  • the PCEF is located in a gateway device PGW of the packet data network.
  • the PA acquires the PCRF used by the user equipment to establish a Gx session, and selects the same PCRF to establish an Rx session of the user equipment, and implements the same PCRF.
  • the Gx and Rx sessions solve the problem of PCC session association in the related art.
  • the embodiment of the present invention further discloses a computer program, including program instructions.
  • the PCEF can perform the association method of the policy control and the charging control session on the PCEF side.
  • the embodiment of the invention also discloses a carrier carrying the computer program.
  • the embodiment of the invention further discloses a computer program, comprising program instructions, when the program instruction is executed by the policy agent, so that the policy agent can perform the association method of the policy control and the charging control session of any of the above-mentioned policy agent side.
  • the embodiment of the invention also discloses a carrier carrying the computer program.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, the invention is not limited to any specific combination of hardware and software.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • each device/function module/functional unit in the above embodiment When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the PCEF selects a PCRF suitable for the user equipment, and carries the selected PCRF identifier to the PA, and the PA selects the same PCRF to establish an Rx session of the user equipment, and implements the same
  • the Gx and Rx sessions are performed on one PCRF, which solves the problem of PCC session association in the related art. Therefore, the present invention has strong industrial applicability.

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Abstract

一种策略控制和计费控制会话的关联方法和装置，所述方法包括：策略和计费规则功能PCEF获取策略与计费规则功能PCRF，并向策略代理发送所述用户设备对应的PCRF，其中所述PCRF用于建立用户设备的Gx会话。本发明技术方案实现了Gx会话的关联。

Description

策略控制和计费控制会话的关联方法和装置 技术领域
本文涉及策略控制和计费控制会话的关联技术领域，尤其涉及一种策略控制和计费控制会话的关联方法和装置。
背景技术
为了给用户提供差异化的服务，在网络中引入了策略控制和计费控制PCC(Policy and Charging Control)架构，策略与计费规则功能PCRF(Policy and Charging Rules Function)通过接口Rx和运营商的IP业务网络连接，获取业务信息；PCRF通过Gx接口与分组数据网的网关设备PGW(Packet Data Network Gateway，PDN Gateway)相连，负责发起IP承载的建立，保证业务数据的服务质量Qos(Quality of service)，并进行计费控制。其中，PGW负责策略和计费规则的执行，即是PCEF(Policy and Charging Enforcement function)功能。
用户上线或者PDN连接建立时，PGW(PCEF)和PCRF之间会建立Gx会话；当用户访问业务时，策略代理PA(Policy Agent)与PCRF之间建立所述用户设备的Rx会话并将业务信息传递至PCRF，PCRF根据业务等信息进行决策，生成适合用户的控制及计费规则，并通过Gx接口下发至PCEF，由PCEF负责执行，从而为用户提供差异化的服务。只有同一个用户的Gx会话和Rx会话汇集在同一个PCRF上，该PCRF才能将Gx会话和Rx会话关联在一起，从而产生适用于该用户的策略规则和计费规则，否则PCC管控流程无法完成。
由于PCRF的信令处理能力及容量限制，在实际运营时存在部署多套PCRF的场景，这样可能导致用户的Gx会话与Rx会话可能关联在不同PCRF上，造成不能根据业务信息为用户制定策略，从而不能达到协同网络与业务的目的。因此，必须有一种方法确保在Gx接口和Rx接口上，能够正确寻址到相同的PCRF来为用户服务，解决多PCRF部署环境下的PCC会话关联问题。
在3GPP规范中，采用DRA(Diameter Routing Agent；路由代理)设备实现，即在Gx接口和Rx接口上通过同一对DRA设备实现同一用户的PCC会话关联。但在现实运营时，未必会部署DRA设备，如何进行PCC会话的关联是亟待解决的问题。
发明内容
本发明要解决的技术问题是提供一种策略控制和计费控制会话的关联方法和装置，以在网络中存在多PCRF且未部署DRA设备时，实现PCC会话的关联。
为解决上述技术问题，采用如下技术方案：
一种策略控制和计费控制会话的关联方法，包括：
策略和计费规则功能PCEF获取用户设备的策略与计费规则功能PCRF，并向策略代理发送所述PCRF，其中所述PCRF用于建立所述用户设备的Gx会话。
可选地，所述PCEF向策略代理发送所述PCRF的步骤包括：
所述PCEF在接收到业务访问请求时，将所述PCRF的标识添加到所述业务访问请求中，并将包括所述PCRF的标识的所述业务访问请求发送到所述策略代理。
可选地，所述PCEF将所述PCRF的标识添加到所述业务访问请求中的步骤包括：
所述PCEF在所述业务访问请求的报文中报文头的可选字段内添加所述PCRF的标识。
可选地，所述PCEF获取用户设备的PCRF的步骤包括：
所述PCEF根据每个PCRF的负荷信息，为所述用户设备选择所述PCRF；或者，
所述PCEF根据所述用户设备的标识，从预先设置的用户设备与PCRF的对应关系中，确定所述用户设备对应的PCRF。
可选地，所述PCEF获取用户设备的PCRF的步骤包括：
当检测到所述用户设备上线或者所述用户设备建立分组数据网PDN连接时，所述PCEF获取所述用户设备的PCRF。
一种策略控制和计费控制会话的关联方法，包括：
策略代理获取策略与计费规则功能PCRF，其中所述PCRF用于建立用户设备的Gx会话；
所述策略代理与所述PCRF建立所述用户设备的Rx会话。
可选地，所述策略代理获取PCRF的步骤包括：
所述策略代理接收策略和计费规则功能PCEF发送的业务访问请求，其中所述业务请求消息包括所述PCRF的标识；
所述策略代理根据所述业务访问请求中的所述PCRF的标识，确定所述PCRF。
可选地，所述策略代理根据所述业务访问请求中的所述PCRF的标识，确定所述PCRF的步骤包括：
所述策略代理获取所述业务访问请求中存储所述PCRF的标识的字段的位置信息；
所述策略代理根据所述位置信息，从所述业务访问请求中获取所述PCRF的标识。
一种策略和计费规则功能PCEF实体，包括第一获取模块和发送模块，其中：
所述第一获取模块设置成：获取用户设备的策略与计费规则功能PCRF，其中所述PCRF用于建立所述用户设备的Gx会话；
所述发送模块设置成：向策略代理发送所述PCRF。
可选地，所述发送模块包括添加单元和发送单元，其中：
所述添加单元设置成：在接收到业务访问请求时，将所述PCRF的标识 添加到所述业务访问请求中；
所述发送单元设置成：将包括所述P CRF的标识的所述业务访问请求发送到所述策略代理。
可选地，所述添加单元设置成按照如下方式将所述PCRF的标识添加到所述业务访问请求：
在所述业务访问请求的报文中报文头的可选字段内添加所述PCRF的标识。
可选地，所述第一获取模块设置成按照如下方式获取用户设备的PCRF：
根据每个PCRF的负荷信息，为所述用户设备选择所述PCRF；或者，
根据所述用户设备的标识，从预先设置的用户设备与PCRF的对应关系中，确定所述用户设备对应的PCRF。
可选地，所述第一获取模块设置成按照如下方式获取用户设备的PCRF：
当检测到所述用户设备上线或者所述用户设备建立分组数据网PDN连接时，所述PCEF获取所述用户设备的PCRF。
可选地，所述PCEF实体位于分组数据网的网关设备PGW。
一种策略代理，包括第二获取模块和建立模块，其中：
所述第二获取模块设置成：获取策略与计费规则功能PCRF，其中所述PCRF用于建立用户设备的Gx会话；
所述建立模块设置成：与所述PCRF建立所述用户设备的Rx会话。
可选地，所述第二获取模块包括接收单元和确定单元，其中：
所述接收单元设置成：接收策略和计费规则功能PCEF发送的业务访问请求，其中所述业务请求消息包括所述PCRF的标识；
所述确定单元设置成：根据所述业务访问请求中的所述PCRF的标识，确定所述PCRF。
可选地，所述确定单元包括第一获取子单元和第二获取子单元，其中：
所述第一获取子单元设置成：获取所述业务访问请求中存储所述PCRF的标识的字段的位置信息；
所述第二获取子单元设置成：根据所述位置信息，从所述业务访问请求中获取所述PCRF的标识。
一种策略控制和计费控制会话的关联系统，该系统包括：策略与计费规则功能PCRF，上述任意的策略和计费规则功能PCEF和上述任意的策略代理，其中：
所述PCRF设置成：将建立的用户设备的Gx会话和所述策略代理与所述PCRF建立的Rx会话关联。
一种策略控制和计费控制会话的关联系统，系统包括：策略和计费规则功能PCEF、策略代理和策略与计费规则功能PCRF，其中：所述PCEF，用于获取策略与计费规则功能PCRF，并向策略代理发送所述用户设备对应的PCRF，其中所述PCRF用于建立用户设备的Gx会话；所述策略代理，用于获取策略与计费规则功能PCRF，其中所述PCRF用于建立用户设备的Gx会话，并与所述PCRF建立所述用户设备的Rx会话；所述PCRF，用于关联所述用户设备的Gx会话和Rx会话。
其中，所述PCEF，具体设置成：在接收到业务访问请求时，将所述PCRF的标识添加到业务访问请求中，并将包括PCRF的标识的业务访问请求发送到策略代理；所述策略代理，具体设置成：接收PCEF发送的业务访问请求，其中所述业务请求消息包括PCRF的标识，并根据所述业务访问请求中的PCRF的标识，确定所述PCRF。
其中，所述PCEF，具体设置成：在所述业务访问请求的报文中报文头的可选字段内添加所述PCRF的标识。
其中，所述策略代理，具体设置成：获取所述业务访问请求中存储PCRF的标识的字段的位置信息，并根据所述位置信息，从所述业务访问请求中获取所述PCRF的标识。
其中，所述PCEF，具体设置成：根据每个PCRF的负荷信息，为所述用户设备选择PCRF；或者，根据所述用户设备的标识，从预先设置的用户设备与PCRF的对应关系中，确定所述用户设备对应的PCRF。
其中，所述PCEF，具体设置成：当检测到所述用户设备上线或者所述设备建立分组数据网PDN连接时，选择所述PCRF。
其中，所述PCEF位于分组数据网的网关设备PGW。
本发明提供实施例，在多个PCRF且未部署DRA设备时，PCEF选择适合用户设备的PCRF，并将所选PCRF标识携带给PA，PA选择同一PCRF建立用户设备的Rx会话，实现在同一个PCRF上进行Gx和Rx会话，解决了相关技术中PCC会话关联的问题。
附图概述
图1为本发明提供的一种策略控制和计费控制会话的关联方法的流程图；
图2为本发明提供的另一种策略控制和计费控制会话的关联方法的流程图；
图3为本发明实施例提供的多PCRF部署系统的示意图；
图4为本发明实施例提供的多PCRF部署系统下的PCC会话关联方法的流程图；
图5为本发明实施例提供的策略控制和计费控制会话的关联方法应用实例的交互图；
图6为本发明实施例提供的PCEF实体的示意图；
图7为本发明实施例提供的策略代理的结构图；
图8为本发明实施例提供的策略控制和计费控制会话的关联系统的结构图。
本发明的较佳实施方式
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
下面将结合附图及具体实施例对本发明作进一步的详细描述。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
图1为本发明实施例提供的一种策略控制和计费控制会话的关联方法的流程图。图1所示方法，包括：
步骤101、PCEF获取PCRF，其中所述PCRF用于建立用户设备的Gx会话所使用的PCRF；
步骤102、所述PCEF向PA发送所述用户设备对应的PCRF。
本发明提供的方法实施例，在多个PCRF且未部署DRA设备时，PCEF选择适合用户设备的PCRF，并将所选PCRF标识携带给PA，使得PA选择同一PCRF建立用户设备的Rx会话，实现在同一个PCRF上进行Gx和Rx会话，解决了相关技术中PCC会话关联的问题。
图2为本发明实施例提供的另一种策略控制和计费控制会话的关联方法的流程图。图2所示方法，包括：
步骤201、PA获取PCRF，其中所述PCRF用于建立用户设备的Gx会话所使用的PCRF；
步骤202、所述PA与所述PCRF建立所述用户设备的Rx会话。
本发明提供的方法实施例，在多个PCRF且未部署DRA设备时，PA获取为用户设备建立Gx会话所使用的PCRF，并选择同一PCRF建立用户设备的Rx会话，实现在同一个PCRF上进行Gx和Rx会话，解决了相关技术中PCC会话关联的问题。
下面对本发明实施例提供的方法作进一步说明：
其中，PCRF的标识，可以通过新定义的消息发送给PA，也可以借助PCEF与PA通信过程中的消息来传输。下面对利用已有消息进行传输进行说明：
所述PCEF向PA发送所述用户设备对应的PCRF，包括：
所述PCEF在接收到业务访问请求时，将为建立所述用户设备的Gx会话所使用的PCRF的标识添加到业务访问请求中，并将包括PCRF的标识的业务访问请求发送到PA。
相应的，所述PA获取为建立所述用户设备的Gx会话所使用的PCRF，包括：
所述PA接收PCEF发送的业务访问请求，其中所述业务请求消息包括为建立所述用户设备的Gx会话所使用的PCRF的标识；
根据所述业务访问请求中的PCRF的标识，确定为建立所述用户设备的Gx会话所使用的PCRF。
由上可以看出，本发明实施例借助PCEF与PA通信过程中的业务访问请求，由该业务访问请求携带PCRF的标识，使得PCEF与PA均获知使用哪个PCEF建立对应的会话，无需修改在相关协议中增加新的消息，实现简单方便。
其中，所述PCEF将所述PCRF的标识添加到业务访问请求中，包括：
所述PCEF在所述业务访问请求的报文中报文头的可选字段内添加所述PCRF的标识。
由上可以看出，报文头的可选字段通常是空白字段，充分利用上述空白字段来传输PCRF的标识信息，充分利用报文的字段资源，提高了资源利用率。
其中，所述策略代理根据所述业务访问请求中的PCRF的标识，确定所述PCRF，包括：
所述策略代理获取所述业务访问请求中存储PCRF的标识的字段的位置信息；
所述策略代理根据所述位置信息，从所述业务访问请求中获取所述PCRF的标识。
具体的，该位置信息可以是策略代理与PCEF协商好的位置，也可以每次发送PCRF的标识时，PCEF通知策略代理本次存储PCRF标识信息的位置信息。
另外，PCEF可以预先为每个用户设备选择建立Gx会话的PCEF，也可 以在用户设备有建立Gx会话需要时，在为用户设备分配对应的PCEF。
其中，所述PCEF获取PCRF，包括：
当检测到所述用户设备上线或者所述设备建立分组数据网PDN连接时，所述PCEF选择所述PCRF。
在所述用户设备上线或者所述设备建立分组数据网PDN连接时，可以确定用户设备有建立Gx会话需要，因此再为用户设备分配对应的PCRF，较预先配置对应的PCRF，保证了PCRF上资源的合理使用。
下面以应用实例对本发明实施例提供的方法作进一步说明：
在多个PCRF场景下，未部署DRA设备时，位于用户侧的PCEF选择了适合用户的PCRF，并将所选PCRF标识携带给PA，PA选择同一PCRF建立所述用户设备的Rx会话，所选PCRF进行Gx和Rx会话关联。
图3为本发明实施例提供的多PCRF部署系统的示意图。如图3所示，多PCRF部署系统包括PCEF单元100、多个PCRF200_1……200_m(其中m为大于等于2的整数)、PA单元300。位于用户侧的PCEF100通常驻留在网关设备，在GPRS的情况下位于GGSN(Gateway GPRS Support Node)，在LTE情况下位于PGW(PDN Gateway)。用户上线或者建立PDN连接时，PCEF100选择合适的PCRF，为用户的PDN连接建立Gx会话，PCEF100提前预置选择PCRF的策略，例如，根据APN信息、或者根据IMSI/MSISDN、或者根据PCRF负荷等。当用户请求业务访问时，PCEF100将所选PCRF的标识通过业务请求报文，携带给PA300；这样，PCEF100和PA300便为同一用户的同一PDN选择了同一PCRF，使得所选PCRF能够进行Gx会话和Rx会话的关联。该方法还简化了PA选择PCRF的过程,如果PCEF和PA各种选择PCRF,则需要选择策略完全一致，否则就会出现所选PCRF不是同一个的情况。
图4为本发明实施例提供的多PCRF部署系统下的PCC会话关联方法的流程图。图4所示流程包括：
步骤401、用户上线或者PDN连接建立时，PCEF根据预置的策略选择合适的PCRF，并和所选PCRF建立Gx会话；另一方面，步骤401也包括用 户请求业务访问时才触发Gx会话建立的场景。
步骤402、PCEF选择到PCRF后，将PCRF标识保存在上下文中。
具体的，所述PCEF获取PCRF，包括：
所述PCEF根据每个PCRF的负荷信息，为所述用户设备选择PCRF；或者，
所述PCEF根据所述用户设备的标识，从预先设置的用户设备与PCRF的对应关系中，确定所述用户设备对应的PCRF。
举例来说，PCEF按照预先设置的负载均衡的处理策略，获取每个RCRF的负荷信息，从中选择负荷最小的PCRF作为用户设备对应的PCRF；或者，按照PCRF的编号顺序，依次为每个PCRF分配一个用户设备，当为该用户设备选择PCRF时，获取上一次选择的PCRF的编号N，则本次分配为该用户设备分配的PCRF的编号为N+1。
当然，也可以为每个用户设备预先分配好对应的PCRF，例如，设置每个PCRF对应的用户设备，以该用户设备的标识进行查找，确定该用户设备对应的PCRF
步骤403、PCEF接收并解析用户业务访问请求，将步骤402保存的所选PCRF标识插入务访问请求报文中；对于IMS业务，则将PCRF标识插入到SIP信令报文中；对于非IMS业务，则将PCRF标识插入到HTTP报文中。
步骤404、PCEF将携带有所选PCRF标识的用户业务访问请求报文发送给PA。
步骤405、PA接收到用户业务访问请求报文，解析出PCEF所选PCRF标识，并和所选PCRF建立所述用户设备的Rx会话。
步骤406、所选PCRF关联Gx会话和Rx会话，并根据Rx会话的信息制定控制及计费规则，通过Gx接口下发给PCEF，由PCEF执行控制及计费策略，为用户提供QOS保障。
本发明提供的应用实例，在多个PCRF且未部署DRA设备时，PCEF选择适合用户设备的PCRF，并将所选PCRF标识携带给PA，PA选择同一PCRF建立用户设备的Rx会话，实现在同一个PCRF上进行Gx和Rx会话，解决 了相关技术中PCC会话关联的问题。
下面对应用实例对方法作进一步说明：
图5为本发明提供的策略控制和计费控制会话的关联方法应用实例的交互图。图5所示方法包括：
步骤510、用户设备向PCEF发送用户上线或者PDN连接建立的信息；
步骤520、PCEF为用户设备选择合适的PCRF；
例如，按照PCRF的编号顺序为用户设备选择一个PCRF等。
步骤530、PCEF利用CCR-I(Credit Control Request initial，初始信用控制请求)/CCA-I(Credit Control Answer initial，初始信用控制应答)建立Gx会话，
步骤540、用户设备向PCEF发送数据包；
步骤550、PCEF在接收到的数据包中增加该用户设备对应的PCER标识，并将包括PCRF标识的数据包发送给PA；
步骤560、PA在接收到数据包后，从该数据包中读取PCRF标识，与该该PCRF标识指示的设备建立Rx会话；
步骤570、PCRF为同一用户设备的Gx会话和Rx会话进行会话关联。
本发明提供的应用实例，在多个PCRF且未部署DRA设备时，PCEF选择适合用户设备的PCRF，并将所选PCRF标识携带给PA，PA选择同一PCRF建立用户设备的Rx会话，实现在同一个PCRF上进行Gx和Rx会话，解决了相关技术中PCC会话关联的问题。
图6为本发明实施例提供的PCEF实体的示意图。图6所示结构，包括：
第一获取模块601，设置成：获取PCRF，其中所述PCRF用于建立用户设备的Gx会话所使用的PCRF；
发送模块602，设置成：向策略代理发送所述用户设备对应的PCRF。
其中，所述发送模块602包括：
添加单元，设置成：在接收到业务访问请求时，将为所述PCRF的标识添加到业务访问请求中；
发送单元，设置成：将包括PCRF的标识的业务访问请求发送到策略代理。
其中，所述添加单元，具体设置成：在所述业务访问请求的报文中报文头的可选字段内添加所述PCRF的标识。
其中，所述第一获取模块601，具体设置成：根据每个PCRF的负荷信息，为所述用户设备选择PCRF；或者，根据所述用户设备的标识，从预先设置的用户设备与PCRF的对应关系中，确定所述用户设备对应的PCRF。
其中，所述第一获取模块601具体设置成：当检测到所述用户设备上线或者所述设备建立分组数据网PDN连接时，所述PCEF选择所述PCRF。
其中，所述PCEF实体位于分组数据网的网关设备PGW。
本发明提供的实施例，在多个PCRF且未部署DRA设备时，PCEF选择适合用户设备的PCRF，并将所选PCRF标识携带给PA，使得PA选择同一PCRF建立用户设备的Rx会话，实现在同一个PCRF上进行Gx和Rx会话，解决了相关技术中PCC会话关联的问题。
图7为本发明实施例提供的策略代理的结构图。图7所示结构，包括：
第二获取模块701，设置成：获取PCRF，其中所述PCRF用于建立用户设备的Gx会话所使用的PCRF；
建立模块702，设置成：与所述PCRF建立所述用户设备的Rx会话。
其中，所述第二获取模块701包括：
接收单元，设置成：接收策略和计费规则功能PCEF发送的业务访问请求，其中所述业务请求消息包括为建立所述用户设备的Gx会话所使用的PCRF的标识；
确定单元，设置成：根据所述业务访问请求中的PCRF的标识，确定为建立所述用户设备的Gx会话所使用的PCRF。
其中，所述确定单元包括：
第一获取子单元，设置成：获取所述业务访问请求中存储PCRF的标识的字段的位置信息；
第二获取子单元，设置成：根据所述位置信息，从所述业务访问请求中获取所述PCRF的标识。
本发明提供的实施例，在多个PCRF且未部署DRA设备时，PA获取为用户设备建立Gx会话所使用的PCRF，并选择同一PCRF建立用户设备的Rx会话，实现在同一个PCRF上进行Gx和Rx会话，解决了相关技术中PCC会话关联的问题。
图8为本发明实施例提供的策略控制和计费控制会话的关联系统的结构图。图8所示系统包括：策略和计费规则功能PCEF、策略代理和策略与计费规则功能PCRF，其中：
所述PCEF，设置成：获取策略与计费规则功能PCRF，并向策略代理发送所述用户设备对应的PCRF，其中所述PCRF用于建立用户设备的Gx会话；
所述策略代理，设置成：获取策略与计费规则功能PCRF，其中所述PCRF用于建立用户设备的Gx会话，并与所述PCRF建立所述用户设备的Rx会话；
所述PCRF，设置成：关联所述用户设备的Gx会话和Rx会话。
本系统提供的一种实施方式中：
所述PCEF，具体设置成：在接收到业务访问请求时，将所述PCRF的标识添加到业务访问请求中，并将包括PCRF的标识的业务访问请求发送到策略代理；
所述策略代理，具体设置成：接收策略和计费规则功能PCEF发送的业务访问请求，其中所述业务请求消息包括PCRF的标识，并根据所述业务访问请求中的PCRF的标识，确定所述PCRF。
本系统提供的一种实施方式中：
所述PCEF，具体设置成：在所述业务访问请求的报文中报文头的可选字段内添加所述PCRF的标识。
本系统提供的一种实施方式中，所述确定单元包括：
所述策略代理，具体设置成：获取所述业务访问请求中存储PCRF的标 识的字段的位置信息，并根据所述位置信息，从所述业务访问请求中获取所述PCRF的标识
本系统提供的一种实施方式中：
所述PCEF，具体设置成：根据每个PCRF的负荷信息，为所述用户设备选择PCRF；或者，根据所述用户设备的标识，从预先设置的用户设备与PCRF的对应关系中，确定所述用户设备对应的PCRF。
本系统提供的一种实施方式中，所述PCEF，具体设置成：当检测到所述用户设备上线或者所述设备建立分组数据网PDN连接时，所述PCEF选择所述PCRF。
本系统提供的一种实施方式中，所述PCEF位于分组数据网的网关设备PGW。
本发明提供的系统实施例，在多个PCRF且未部署DRA设备时，PA获取为用户设备建立Gx会话所使用的PCRF，并选择同一PCRF建立用户设备的Rx会话，实现在同一个PCRF上进行Gx和Rx会话，解决了相关技术中PCC会话关联的问题。
本发明实施例还公开了一种计算机程序，包括程序指令，当该程序指令被PCEF执行时，使得该PCEF可执行上述任意的PCEF侧的策略控制和计费控制会话的关联方法。
本发明实施例还公开了一种载有所述的计算机程序的载体。
本发明实施例还公开了一种计算机程序，包括程序指令，当该程序指令被策略代理执行时，使得该策略代理可执行上述任意的策略代理侧的策略控制和计费控制会话的关联方法。
本发明实施例还公开了一种载有所述的计算机程序的载体。
在阅读并理解了附图和详细描述后，可以明白其他方面。
本领域普通技术人员可以理解上述实施例的全部或部分步骤可以使用计算机程序流程来实现，所述计算机程序可以存储于一计算机可读存储介质中，所述计算机程序在相应的硬件平台上(如系统、设备、装置、器件等)执行，在执行时，包括方法实施例的步骤之一或其组合。
可选地，上述实施例的全部或部分步骤也可以使用集成电路来实现，这些步骤可以被分别制作成一个个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
上述实施例中的各装置/功能模块/功能单元可以采用通用的计算装置来实现，它们可以集中在单个的计算装置上，也可以分布在多个计算装置所组成的网络上。
上述实施例中的各装置/功能模块/功能单元以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。上述提到的计算机可读取存储介质可以是只读存储器，磁盘或光盘等。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求所述的保护范围为准。
工业实用性
本发明提供的实施例，在多个PCRF且未部署DRA设备时，PCEF选择适合用户设备的PCRF，并将所选PCRF标识携带给PA，PA选择同一PCRF建立用户设备的Rx会话，实现在同一个PCRF上进行Gx和Rx会话，解决了相关技术中PCC会话关联的问题。因此本发明具有很强的工业实用性。

Claims (18)

  1. 一种策略控制和计费控制会话的关联方法，包括：
    策略和计费规则功能PCEF获取用户设备的策略与计费规则功能PCRF，并向策略代理发送所述PCRF，其中所述PCRF用于建立所述用户设备的Gx会话。
  2. 根据权利要求1所述的策略控制和计费控制会话的关联方法，其中，所述PCEF向策略代理发送所述PCRF的步骤包括：
    所述PCEF在接收到业务访问请求时，将所述PCRF的标识添加到所述业务访问请求中，并将包括所述PCRF的标识的所述业务访问请求发送到所述策略代理。
  3. 根据权利要求2所述的策略控制和计费控制会话的关联方法，其中，所述PCEF将所述PCRF的标识添加到所述业务访问请求中的步骤包括：
    所述PCEF在所述业务访问请求的报文中报文头的可选字段内添加所述PCRF的标识。
  4. 根据权利要求1所述的策略控制和计费控制会话的关联方法，其中，所述PCEF获取用户设备的PCRF的步骤包括：
    所述PCEF根据每个PCRF的负荷信息，为所述用户设备选择所述PCRF；或者，
    所述PCEF根据所述用户设备的标识，从预先设置的用户设备与PCRF的对应关系中，确定所述用户设备对应的PCRF。
  5. 根据权利要求1至4中任一所述的策略控制和计费控制会话的关联方法，其中，所述PCEF获取用户设备的PCRF的步骤包括：
    当检测到所述用户设备上线或者所述用户设备建立分组数据网PDN连接时，所述PCEF获取所述用户设备的PCRF。
  6. 一种策略控制和计费控制会话的关联方法，包括：
    策略代理获取策略与计费规则功能PCRF，其中所述PCRF用于建立用户设备的Gx会话；
    所述策略代理与所述PCRF建立所述用户设备的Rx会话。
  7. 根据权利要求6所述的策略控制和计费控制会话的关联方法，其中，所述策略代理获取PCRF的步骤包括：
    所述策略代理接收策略和计费规则功能PCEF发送的业务访问请求，其中所述业务请求消息包括所述PCRF的标识；
    所述策略代理根据所述业务访问请求中的所述PCRF的标识，确定所述PCRF。
  8. 根据权利要求7所述的策略控制和计费控制会话的关联方法，其中，所述策略代理根据所述业务访问请求中的所述PCRF的标识，确定所述PCRF的步骤包括：
    所述策略代理获取所述业务访问请求中存储所述PCRF的标识的字段的位置信息；
    所述策略代理根据所述位置信息，从所述业务访问请求中获取所述PCRF的标识。
  9. 一种策略和计费规则功能PCEF实体，包括第一获取模块和发送模块，其中：
    所述第一获取模块设置成：获取用户设备的策略与计费规则功能PCRF，其中所述PCRF用于建立所述用户设备的Gx会话；
    所述发送模块设置成：向策略代理发送所述PCRF。
  10. 根据权利要求9所述的PCEF实体，其中，所述发送模块包括添加单元和发送单元，其中：
    所述添加单元设置成：在接收到业务访问请求时，将所述PCRF的标识添加到所述业务访问请求中；
    所述发送单元设置成：将包括所述P CRF的标识的所述业务访问请求发送到所述策略代理。
  11. 根据权利要求10所述的PCEF实体，其中，所述添加单元设置成按照如下方式将所述PCRF的标识添加到所述业务访问请求：
    在所述业务访问请求的报文中报文头的可选字段内添加所述PCRF的标识。
  12. 根据权利要求9所述的PCEF实体，其中，所述第一获取模块设置成按照如下方式获取用户设备的PCRF：
    根据每个PCRF的负荷信息，为所述用户设备选择所述PCRF；或者，
    根据所述用户设备的标识，从预先设置的用户设备与PCRF的对应关系中，确定所述用户设备对应的PCRF。
  13. 根据权利要求9至12中任一所述的PCEF实体，其中，所述第一获取模块设置成按照如下方式获取用户设备的PCRF：
    当检测到所述用户设备上线或者所述用户设备建立分组数据网PDN连接时，所述PCEF获取所述用户设备的PCRF。
  14. 根据权利要求9所述的PCEF实体，其中，所述PCEF实体位于分组数据网的网关设备PGW。
  15. 一种策略代理，包括第二获取模块和建立模块，其中：
    所述第二获取模块设置成：获取策略与计费规则功能PCRF，其中所述PCRF用于建立用户设备的Gx会话；
    所述建立模块设置成：与所述PCRF建立所述用户设备的Rx会话。
  16. 根据权利要求15所述的策略代理，其中，所述第二获取模块包括接收单元和确定单元，其中：
    所述接收单元设置成：接收策略和计费规则功能PCEF发送的业务访问请求，其中所述业务请求消息包括所述PCRF的标识；
    所述确定单元设置成：根据所述业务访问请求中的所述PCRF的标识，确定所述PCRF。
  17. 根据权利要求16所述的策略代理，其中，所述确定单元包括第一获取子单元和第二获取子单元，其中：
    所述第一获取子单元设置成：获取所述业务访问请求中存储所述PCRF的标识的字段的位置信息；
    所述第二获取子单元设置成：根据所述位置信息，从所述业务访问请求中获取所述PCRF的标识。
  18. 一种策略控制和计费控制会话的关联系统，该系统包括：策略与计费规则功能PCRF，如权利要求9-14中任一项所述的策略和计费规则功能PCEF和如权利要求15-17中任一项所述的策略代理，其中：
    所述PCRF设置成：将建立的用户设备的Gx会话和所述策略代理与所述PCRF建立的Rx会话关联。
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