WO2016062026A1 - 一种策略和计费规则功能的选择方法及装置 - Google Patents

一种策略和计费规则功能的选择方法及装置 Download PDF

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Publication number
WO2016062026A1
WO2016062026A1 PCT/CN2015/076193 CN2015076193W WO2016062026A1 WO 2016062026 A1 WO2016062026 A1 WO 2016062026A1 CN 2015076193 W CN2015076193 W CN 2015076193W WO 2016062026 A1 WO2016062026 A1 WO 2016062026A1
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pcrf
dra
session establishment
message
user
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PCT/CN2015/076193
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English (en)
French (fr)
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周晓云
金海�
王卫斌
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中兴通讯股份有限公司
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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 field of communications, and in particular, to a method and apparatus for selecting a policy and charging rule function.
  • PCC Policy and Charging Control
  • 3GPP 3rd Generation Partnership Project
  • the Policy and Charging Rules Function is the core of the entire PCC architecture.
  • the PCRF needs to combine the service information received from the Application Function (AF), the user subscription information received from the Subscription Profile Repository (SPR), and the policy configured by the operator.
  • the PCRF sends the control policy for the service to the Policy and Charging Enforcement Function (PCEF) or the Bearer Binding and Event Report Function (BBERF).
  • PCEF Policy and Charging Enforcement Function
  • BBERF Bearer Binding and Event Report Function
  • the PCRF can subscribe to the bearer layer related events to the PCEF and/or the BBERF to sense in time when the bearer layer occurs, and change the control strategy.
  • the PCEF can also support application detection control functions.
  • the PCEF can perform application detection and perform policy enforcement (such as gating, redirection, and bandwidth limitation) according to the local configuration or the PCC rule that is sent by the PCRF and includes the application identifier.
  • the PCEF is generally located on the gateway GW of the network, such as the Packet Data Network Gateway (PDN-GW) of the EPS, connecting the OCS (Online Billing System) and the OFCS (Offline Billing System).
  • the network can implement application detection control by deploying a separate traffic detection function (Traffic Detection Function, TDF for short).
  • TDF Traffic Detection Function
  • the TDF and the PCRF are connected through the Sd interface.
  • the TDF can perform application detection and policy execution according to the application detection and control (ADC) rules that are pre-configured or sent by the PCRF.
  • ADC application detection and control
  • a PCRF is usually deployed in a public land mobile network PLMN, and the DRA (Diameter Routing Agent) will be responsible for managing these.
  • PCRF and ensure that all policy control sessions (such as Gx, Gxx, Sd sessions) associated with an IP-CAN (IP Connected Access Network) session or a UE (User Equipment, Terminal) are associated with the same PCRF.
  • IP-CAN IP Connected Access Network
  • UE User Equipment, Terminal
  • the DRA can usually select the PCRF according to the number segment of the UE, the IP address, or the load information of each PCRF). Therefore, the DRA does not need to consider the different service processing capabilities of the PCRF to select a PCRF for the UE or IP-CAN session.
  • This document provides a method and apparatus that supports different PCRF selections based on different services.
  • a method for selecting policy and charging rule functions including:
  • the diameter routing agent DRA obtains the subscription information of the specific service subscribed by the user from the user subscription database SPR or the business operation support system BOSS;
  • the DRA selects a policy and charging rule function PCRF for supporting the specific service for the UE or the IP connection access network IP-CAN session according to the subscription information.
  • the determining, by the DRA, the PCRF that supports the specific service for the UE or the IP-CAN session according to the subscription information includes:
  • the DRA selects a PCRF that supports the determined specific service according to the correspondence between the configured PCRF and the specific service supported;
  • the DRA selects any one of the PCRFs of the set of PCRFs.
  • the DRA further includes:
  • the DRA saves a correspondence between the user identifier, a packet data network PDN identifier, and an address of the selected PCRF.
  • the signing information that the DRA obtains the specific service that the user subscribes to from the SPR or the BOSS includes:
  • the DRA searches for the saved correspondence according to the user identifier and the PDN identifier carried in the gateway control session setup message. If the PCRF is not allocated, the user identifier and the packet data network are sent by using the subscription document request message. PDN is identified to SPR or BOSS;
  • the DRA receives the subscription information returned by the SPR or the BOSS, and obtains subscription information of the specific service that the user subscribes to.
  • the DRA further includes:
  • the DRA carries an address of the selected PCRF in a redirect message sent to the BBERF;
  • the DRA After receiving the IP-CAN session establishment indication message that is sent by the policy and charging execution function PCEF, the DRA carries the user identifier and the PDN identifier carried in the IP-CAN session establishment indication message. Searching for the saved correspondence; if the PCRF has been selected, adding the IP address to the saved correspondence; and returning a redirect message carrying the selected PCRF address to the PCEF.
  • the DRA further includes:
  • the DRA After receiving the gateway control session establishment confirmation message returned by the PCRF, the DRA forwards a gateway control session establishment confirmation message to the BBERF, where the gateway control session establishment confirmation message carries a quality of service QoS rule and an event trigger;
  • the DRA receives the IP-CAN session that is sent by the PCEF and carries the assigned IP address.
  • the saved relationship is searched according to the user identifier and the PDN identifier carried in the IP-CAN session establishment indication message; if the PCRF has been selected, the saved relationship is added to the saved relationship.
  • An IP address forwarding the IP-CAN session establishment indication message to the selected PCRF, carrying the user identity, the PDN identity, and the IP address; and returning an IP-CAN session establishment confirmation message to the PCEF.
  • the signing information that the DRA obtains the specific service that the user subscribes to from the SPR or the BOSS includes:
  • the DRA receives an IP-CAN session establishment indication message from the PCEF;
  • the DRA searches for the saved correspondence according to the user identifier and the PDN identifier carried in the IP-CAN session establishment indication message. If the PCRF is not allocated, the user identifier and the PDN identifier are sent by using the subscription document request message. SPR or BOSS;
  • the DRA receives the subscription information returned by the SPR or the BOSS, and obtains subscription information of the specific service that the user subscribes to.
  • the DRA further includes:
  • the DRA carries the address of the selected PCRF in the redirect message sent to the PCEF.
  • the DRA further includes:
  • the DRA forwards the IP-CAN session establishment indication message to the selected PCRF;
  • the DRA After receiving the IP-CAN session establishment confirmation message returned by the PCRF, the DRA returns the IP-CAN session establishment confirmation message to the PCEF, where the IP-CAN session establishment confirmation message carries the policy and charging Control architecture PCC rules and event triggers.
  • a device for selecting a policy and charging rule function which is disposed in the diameter routing agent DRA, and includes:
  • the subscription information obtaining module is configured to: obtain subscription information of a specific service subscribed by the user from the user subscription database SPR or the business operation support system BOSS;
  • the selecting module is configured to: select, according to the subscription information, a UE and an IP connection access network IP-CAN session to support the policy and charging rule function PCRF of the specific service.
  • the selection module is set to:
  • the device further includes:
  • a storage module configured to: after the selection module selects, according to the subscription information, a PCRF that supports the specific service for the UE or the IP-CAN session, save the user identifier, the packet data network PDN identifier, and the selected PCRF. The correspondence between the addresses.
  • the subscription information obtaining module is configured to:
  • the device further includes:
  • the interaction module is configured to: after the storage module saves the corresponding relationship, carry the address of the selected PCRF in the redirect message sent to the BBERF; and carry the policy and the charging execution function sent by the PCEF
  • the corresponding relationship saved by the storage module is searched according to the user identifier and the PDN identifier carried in the IP-CAN session establishment indication message;
  • the PCRF indicates that the storage module joins the IP address in the saved correspondence, and returns a redirect message carrying the selected PCRF address to the PCEF.
  • the device further includes:
  • the interaction module is configured to: after the storage module saves the corresponding relationship, send a gateway control session setup message to the selected PCRF, carrying the user identifier and the PDN identifier; After the gateway returned by the PCRF controls the session establishment confirmation message, the gateway control session establishment confirmation message is forwarded to the BBERF, where the gateway control session establishment confirmation message carries the quality of service QoS rule and the event trigger; when the PCEF is received After the sent IP-CAN session establishment indication message carrying the assigned IP address, the user identifier and the PDN identifier in the IP-CAN session establishment indication message are used to search for the corresponding relationship saved by the storage module; Selecting the PCRF, instructing the storage module to join the IP address in the saved correspondence; forwarding the IP-CAN session establishment indication message to the selected PCRF, carrying the user identifier, the PDN identifier, and IP address; return an IP-CAN session establishment confirmation message to the PCEF.
  • the subscription information obtaining module is configured to:
  • the subscription information obtaining module receives an IP-CAN session establishment indication message from the PCEF, and searches for the corresponding relationship saved by the storage module according to the user identifier and the PDN identifier carried in the IP-CAN session establishment indication message, if not After the PCRF is allocated, the user identifier and the PDN identifier are sent to the SPR or the BOSS through the subscription document request message; the subscription information returned by the SPR or the BOSS is received, and the subscription information of the specific service subscribed by the user is obtained therefrom.
  • the device further includes:
  • the interaction module is configured to: after the storage module saves the correspondence, carry the address of the selected PCRF in the redirect message sent to the PCEF.
  • the device further includes:
  • the interaction module is configured to: after the storage module saves the correspondence, forward the IP-CAN session establishment indication message to the selected PCRF; and receive an IP-CAN session establishment confirmation message returned by the PCRF Thereafter, the IP-CAN session establishment confirmation message is returned to the PCEF, and the IP-CAN session establishment confirmation message carries a PCC rule and an event trigger.
  • the technical solution of the embodiment of the present invention can deploy one or a group of PCRFs in an existing PCRF domain to support processing of new services, and support different PCRF selections according to different services.
  • 1 is a schematic structural diagram of a 3GPP evolved packet system
  • FIG. 2 is a flowchart of a method for selecting a policy and a charging rule function according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a structure 1 according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a second architecture according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of Embodiment 1 of a method for selecting a PCRF according to an embodiment of the present invention
  • FIG. 6 is a flowchart of Embodiment 2 of a method for selecting a PCRF according to an embodiment of the present invention
  • FIG. 7 is a flowchart of Embodiment 3 of a method for selecting a PCRF according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of Embodiment 4 of a method for selecting a PCRF according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a device for selecting a policy and a charging rule function according to an embodiment of the present invention.
  • a method for selecting a policy and a charging rule function in the embodiment of the present invention, as shown in FIG. 2, includes:
  • Step 101 The DRA obtains subscription information of a specific service subscribed by the user from the SPR or BOSS (Business Operation Support System);
  • Step 102 The DRA selects, according to the subscription information, a PCRF that supports the specific service for the UE or the IP-CAN session.
  • the DRA is responsible for managing the PCRF in the PCRF domain.
  • the DRA can be implemented as a Redirect Agent or a Proxy Agent.
  • the number of PCRFs in this domain is 2 or more (such as PCRF1 and PCRF2 in Fig. 3).
  • the SPR stores the subscription information of the specific service signed by the user.
  • PCRF clients (such as BBERF, PCEF, and AF) interact with the DRA to select PCRFs in the domain that support this particular service.
  • the DRA is responsible for managing the PCRF in the PCRF domain.
  • the implementation of the DRA may be a redirect proxy (Redirect Agent). It can also be a Proxy Agent.
  • the number of PCRFs in this domain is 2 or more (such as PCRF1 and PCRF2 in Fig. 4).
  • the BOSS stores the subscription information of the specific business signed by the user.
  • PCRF clients (such as BBERF, PCEF, and AF) interact with the DRA to select PCRFs in the domain that support this particular service.
  • FIG. 5 is a flowchart of Embodiment 1 of a method for selecting a PCRF according to an embodiment of the present invention. As shown in FIG. 5, the following steps 401-417 are included:
  • Step 401 The UE establishes an IP-CAN session through E-UTRAN access or from a trusted non-3GPP network access request, and the S-GW or the A-GW/ePDG receives a message requesting to establish an IP-CAN session, where the message carries the user.
  • Step 402 The BBERF located in the S-GW or the A-GW/ePDG sends a gateway control session establishment message to the DRA, where the message carries the user identifier and the PDN identifier.
  • Step 403 The DRA searches for the locally saved correspondence according to the user identifier and the PDN identifier, and finds that the PCRF is not selected for the user identifier or the user identifier and the corresponding PDN identifier, and the DRA sends a subscription document request message to the SPR or the BOSS, and the message carries the message.
  • Step 404 The SPR or the BOSS returns the subscription information according to the user identifier, where the subscription information of the specific service subscribed by the user is included;
  • Step 405 The DRA saves the subscription information, and determines, according to the subscription information, a specific service that the user subscribes to;
  • Step 406 The DRA is based on the specific service subscribed by the user, and according to the configuration on the DRA (ie, Selecting a correspondence between the PCRF and the specific service supported by the UEF, selecting a PCRF for the UE or IP-CAN session to support the specific service, and storing the user identifier, the PDN identifier, and the address of the selected PCRF Corresponding relationship, carrying the address of the selected PCRF in the redirect message sent to the BBERF;
  • the configuration on the DRA ie, Selecting a correspondence between the PCRF and the specific service supported by the UEF, selecting a PCRF for the UE or IP-CAN session to support the specific service, and storing the user identifier, the PDN identifier, and the address of the selected PCRF Corresponding relationship, carrying the address of the selected PCRF in the redirect message sent to the BBERF;
  • the DRA When a set of PCRFs is deployed in the network to support the specific service development, then the DRA will select any one of the PCRFs in the set of PCRFs.
  • Step 407 The BBERF sends a gateway control session establishment message to the PCRF, where the message carries the user identifier and the PDN identifier.
  • Step 408 The PCRF sends a subscription document request message to the SPR, where the message carries the user identifier and the PDN identifier.
  • Step 409 The SPR returns the subscription information.
  • Step 410 The PCRF formulates a policy according to the subscription information, the network policy, the access network information, and the like, such as a PCC rule, a QoS rule, and an event trigger.
  • the PCRF returns a gateway control session establishment confirmation message to the BBERF, and carries the QoS rule and the event trigger.
  • BBERF installation strategy ;
  • Step 411 The gateway where the BBERF is located sends a request to establish an IP-CAN session to the gateway where the PCEF is located, and the message carries the user identifier and the PDN identifier; the gateway where the PCEF is located allocates an IP Address for the established IP-CAN session;
  • Step 412 The PCEF sends an IP-CAN session establishment indication message to the DRA, where the message carries the user identifier, the PDN identifier, and the assigned IP Address.
  • Step 413 The DRA searches for the saved correspondence according to the user identifier and the PDN identifier, and finds that the PCRF has been selected for the IP-CAN session or the UE, and the corresponding relationship (user identifier, PDN identifier, IP Address, PCRF address) is updated.
  • the DRA returns a redirect message to the PCEF, carrying the PCRF address.
  • Step 414 The PCEF sends an IP-CAN session establishment indication message to the PCRF, where the message carries the user identifier, the PDN identifier, and the IP Address.
  • Step 415 The PCRF returns a PCC rule and an event trigger defined in step 410 according to the user identifier and the PDN identifier.
  • Step 416 The gateway where the PCEF is located returns a response to the gateway where the BBERF is located to establish an IP-CAN. Word, carry IP Address;
  • Step 417 The gateway where the BBERF is located returns a response to establish an IP-CAN session, carrying an IP Address.
  • the DRA selects a PCRF for the UE or the IP-CAN session to support the specific service for the user to subscribe.
  • the PCRF formulates a policy according to the subscription information of the specific service subscribed by the user.
  • This embodiment describes that the UE accesses from the E-UTRAN in the non-roaming scenario and uses the GTP (GPRS Tunnel Protocol) or the UE from the S-GW and the P-GW.
  • GTP GPRS Tunnel Protocol
  • the trusted non-3GPP network or the untrusted non-3GPP network accesses the 3GPP system and the GTP protocol is adopted between the A-GW/ePDG and the P-GW, an IP-CAN session process and a PCRF selection process are established.
  • the DRA is a Redirect Agent, based on The implementation of the structure shown in Figure 3 or Figure 4.
  • Figure 6 is a flowchart of Embodiment 2 of the method for selecting a PCRF according to an embodiment of the present invention, which includes the following steps 501-511:
  • Step 501 The UE accesses the EPS system through E-UTRAN or non-3GPP, and the P-GW receives a message requesting to establish an IP-CAN session, where the message carries the user identifier and the PDN identifier.
  • Step 502 The PCEF located in the P-GW sends an IP-CAN session establishment indication message to the DRA, where the message carries the user identifier and the PDN identifier.
  • Step 503 The DRA searches for the locally saved correspondence according to the user identifier and the PDN identifier, and finds that the PCRF is not selected for the user or the user and the corresponding PDN identifier, and the DRA sends a subscription document request message to the SPR or the BOSS, where the message carries the user identifier. And PDN logo;
  • Step 504 The SPR or the BOSS returns the subscription information according to the user identifier, where the subscription information of the specific service subscribed by the user is included;
  • Step 505 The DRA saves the subscription information, and determines, according to the subscription information, a specific service that the user subscribes to;
  • Step 506 The DRA selects a UE or an IP-CAN session according to the specific service subscribed by the user, and according to the configuration on the DRA (ie, the correspondence between the PCRF and the specific service supported by the UE). Selecting a PCRF that supports the specific service, and storing a correspondence between the user identifier, the PDN identifier, and the address of the selected PCRF, and carrying the address of the selected PCRF in the redirect message sent to the PCEF;
  • the DRA When a set of PCRFs is deployed in the network to support the specific service development, then the DRA will select any one of the PCRFs in the set of PCRFs.
  • Step 507 The PCEF sends an IP-CAN session establishment indication message to the PCRF, where the message carries the user identifier, the PDN identifier, and the IP Address.
  • Step 508 The PCRF sends a subscription document request message to the SPR, where the message carries the user identifier and the PDN identifier.
  • Step 509 The SPR returns the subscription information.
  • Step 510 The PCRF formulates policies, such as PCC rules and event triggers, according to the subscription information, the network policy, and the access network information.
  • the PCRF returns an IP-CAN session establishment confirmation message to the PCEF, carrying the PCC rules and event triggers; the PCEF installation policy;
  • Step 511 The P-GW returns a response to establish an IP-CAN session, carrying an IP Address.
  • the DRA selects a PCRF for the UE or the IP-CAN session to support the specific service for the user to subscribe.
  • the PCRF formulates a policy according to the subscription information of the specific service subscribed by the user.
  • This embodiment describes that the user accesses from the E-UTRAN and adopts the PMIPv6 protocol between the S-GW and the P-GW, or the UE accesses the 3GPP system from the trusted non-3GPP network or the untrusted non-3GPP network and the A-GW/
  • the PMIPv6 protocol is adopted between the ePDG and the P-GW, an IP-CAN session process and a PCRF selection process are established.
  • the DRA is a Proxy Agent and is implemented based on the structure shown in FIG. 3 or FIG. 4.
  • FIG. 7 is a flowchart of Embodiment 3 of a method for selecting a PCRF according to an embodiment of the present invention, including the following steps 601-617:
  • Step 601 The UE establishes an IP-CAN session through E-UTRAN access or from a trusted non-3GPP network access request, and the S-GW or the trusted non-3GPP access gateway (A-GW) receives a request to establish an IP-CAN session.
  • Message the message carrying the user identifier and the PDN identifier;
  • Step 602 The BBERF located at the S-GW or the A-GW sends a gateway control session establishment message to the DRA, where the message carries the user identifier and the PDN identifier.
  • Step 603 The DRA searches for the locally saved correspondence according to the user identifier and the PDN identifier, and finds that the PCRF is not selected for the user or the user and the corresponding PDN identifier, and the DRA sends a subscription document request message to the SPR or the BOSS, where the message carries the user identifier. And PDN logo;
  • Step 604 The SPR or the BOSS returns the subscription information according to the user identifier, where the subscription information of the specific service subscribed by the user is included;
  • Step 605 The DRA saves the subscription information, and determines, according to the subscription information, a specific service that the user subscribes to;
  • Step 606 The DRA selects a support for the specific service for the UE or the IP-CAN session according to the specific service subscribed by the user, and according to the configuration on the DRA (ie, the correspondence between the PCRF and the specific service supported).
  • the PCRF stores a correspondence between the user identifier, the PDN identifier, and the address of the selected PCRF, and the DRA sends a gateway control session establishment message to the selected PCRF, where the message carries the user identifier and the PDN identifier.
  • the DRA When a set of PCRFs is deployed in the network to support the specific service development, then the DRA will select any one of the PCRFs in the set of PCRFs.
  • Step 607 The PCRF sends a subscription document request message to the SPR, where the message carries the user identifier and the PDN identifier.
  • Step 608 The SPR returns the subscription information.
  • Step 609 The PCRF formulates policies according to the subscription information, the network policy, and the access network information, such as PCC rules, QoS rules, and event triggers.
  • the PCRF returns a gateway control session establishment confirmation message to the DRA, carrying QoS rules and event triggers.
  • Step 610 The DRA forwards the gateway control session establishment confirmation message to the BBERF, carries the QoS rule and the event trigger, and the BBERF installation policy.
  • Step 611 The gateway where the BBERF is located sends a request to establish an IP-CAN session to the gateway where the PCEF is located, and the message carries the user identifier and the PDN identifier; the gateway where the PCEF is located allocates an IP Address for the established IP-CAN session;
  • Step 612 The PCEF sends an IP-CAN session establishment indication message to the DRA, where the message carries User ID, PDN ID, and assigned IP Address;
  • Step 613 The DRA searches for the save information according to the user identifier and the PDN identifier, and finds that the PCRF has been selected for the IP-CAN session or the UE, and the corresponding relationship (user identifier, PDN identifier, IP Address, PCRF address) is updated.
  • the DRA forwards an IP-CAN session establishment indication message to the selected PCRF, carrying the user identifier, the PDN identifier, and the IP address;
  • Step 614 The PCRF returns a PCC rule and an event trigger defined in step 609 according to the user identifier and the PDN identifier.
  • Step 615 The DRA returns an IP-CAN session establishment confirmation message to the PCEF.
  • Step 616 The gateway where the PCEF is located returns a response to the gateway where the BBERF is located to establish an IP-CAN session, and carries an IP Address;
  • Step 617 The gateway where the BBERF is located returns a response to establish an IP-CAN session, carrying an IP Address.
  • the DRA selects a PCRF for the UE or the IP-CAN session to support the specific service for the user to subscribe.
  • the PCRF formulates a policy according to the subscription information of the specific service subscribed by the user.
  • This embodiment describes that the UE accesses from the E-UTRAN in the non-roaming scenario and uses the GTP protocol between the S-GW and the P-GW, or the UE accesses the 3GPP from the trusted non-3GPP network or the untrusted non-3GPP network.
  • the system uses the GTP protocol between the A-GW/ePDG and the P-GW, an IP-CAN session process and a PCRF selection process are established.
  • the DRA is a Proxy Agent and is implemented based on the structure shown in FIG. 3 or FIG. 4.
  • FIG. 8 is a flowchart of Embodiment 4 of a method for selecting a PCRF according to an embodiment of the present invention, including the following steps 701-711:
  • Step 701 The UE accesses the EPS system through the E-UTRAN or the non-3GPP network, and the P-GW receives the message requesting to establish an IP-CAN session, where the message carries the user identifier and the PDN identifier.
  • Step 702 The PCEF located in the P-GW sends an IP-CAN session establishment indication message to the DRA, where the message carries the user identifier, the PDN identifier, and the IP address.
  • Step 703 The DRA searches for the locally saved correspondence according to the user identifier and the PDN identifier, and sends the corresponding relationship.
  • the user does not select a PCRF for the user or the user and the corresponding PDN identifier, and the DRA sends a subscription document request message to the SPR or the BOSS, where the message carries the user identifier and the PDN identifier.
  • Step 704 The SPR or the BOSS returns the subscription information according to the user identifier, where the subscription information of the specific service subscribed by the user is included;
  • Step 705 The DRA saves the subscription information, and determines, according to the subscription information, a specific service that the user subscribes to;
  • Step 706 The DRA selects a PCRF supporting the service for the UE or the IP-CAN session according to the specific service subscribed by the user, and according to the configuration on the DRA (ie, the correspondence between the PCRF and the specific service supported), and saves the PCRF.
  • the DRA forwards the IP-CAN session establishment indication message to the PCRF;
  • the DRA When a set of PCRFs is deployed in the network to support the specific service development, then the DRA will select any one of the PCRFs in the set of PCRFs.
  • Step 707 The PCRF sends a subscription document request message to the SPR, where the message carries the user identifier and the PDN identifier.
  • Step 708 The SPR returns the subscription information.
  • Step 709 The PCRF formulates policies, such as PCC rules and event triggers, according to the subscription information, the network policy, and the access network information.
  • the PCRF returns an IP-CAN session establishment confirmation message to the DRA, carrying the PCC rules and event triggers.
  • Step 710 The DRA returns an IP-CAN session establishment confirmation message to the PCEF, where the message carries a PCC rule and an event trigger; the PCEF installation policy;
  • Step 711 The P-GW returns a response to establish an IP-CAN session, carrying an IP Address.
  • the DRA selects a PCRF for the UE or the IP-CAN session to support the specific service for the user to subscribe.
  • the PCRF formulates a policy according to the subscription information of the specific service subscribed by the user.
  • the UE or the IP-CAN session is selected to support the specific service.
  • PCRF Physical Broadband Radio Service
  • an eDRA evolved DRA
  • the eDRA may be deployed after the current DRA, and the eDRA may exchange with the SPR/BOSS to obtain subscription information of a specific service. If the user does not have subscription information for a specific service, the eDRA will select a normal PCRF; if the user has subscription information for a specific service, the eDRA will select a PCRF that supports the corresponding specific service. The flow is similar to that of FIG. 5 to FIG. 8 and will not be described again.
  • a device for selecting a policy and a charging rule function is disposed in the Diameter Routing Agent DRA, and includes:
  • the subscription information obtaining module 901 is configured to: obtain subscription information of a specific service subscribed by the user from the user subscription database SPR or the business operation support system BOSS;
  • the selecting module 902 is configured to: according to the subscription information, select a policy and charging rule function PCRF for supporting the specific service for the UE or the IP connection access network IP-CAN session.
  • the selecting module 902 is configured to: determine, according to the subscription information, a specific service that is subscribed by the user; and select, according to the correspondence between the configured PCRF and the specific service that is supported, to support performing the determined specific service.
  • PCRF select one of the PCRFs in the set of PCRFs when a set of PCRFs is deployed in the network to support the specific service development.
  • the device further includes: a storage module, configured to: after the selection module 902 selects a PCRF for supporting the specific service for the UE or the IP-CAN session according to the subscription information, save the user identifier, group The correspondence between the data network PDN identifier and the address of the selected PCRF.
  • a storage module configured to: after the selection module 902 selects a PCRF for supporting the specific service for the UE or the IP-CAN session according to the subscription information, save the user identifier, group The correspondence between the data network PDN identifier and the address of the selected PCRF.
  • the subscription information obtaining module 901 is configured to: receive a gateway control session establishment message from the bearer binding and event reporting function BBERF; and control the user identifier and the PDN identifier carried in the session establishment message according to the gateway, and search for the location Corresponding relationship saved by the storage module, if the PCRF is not allocated, sending the user identifier and the packet data network PDN identifier to the SPR or BOSS through the subscription document request message; receiving the subscription information returned by the SPR or BOSS, and obtaining the subscription information from the SPR or the BOSS The contract information of the specific business signed by the user.
  • the device further includes: an interaction module, configured to: after the storage module saves the correspondence, carry the selected PCRF in the redirect message sent to the BBERF Address: after receiving the IP-CAN session establishment indication message sent by the policy and charging execution function PCEF carrying the assigned IP address, searching according to the user identifier and the PDN identifier carried in the IP-CAN session establishment indication message And the corresponding relationship saved by the storage module; if the PCRF has been selected, instructing the storage module to join the IP address in the saved correspondence; and returning to the PCEF to carry the selected PCRF address Redirect message.
  • an interaction module configured to: after the storage module saves the correspondence, carry the selected PCRF in the redirect message sent to the BBERF Address: after receiving the IP-CAN session establishment indication message sent by the policy and charging execution function PCEF carrying the assigned IP address, searching according to the user identifier and the PDN identifier carried in the IP-CAN session establishment indication message And the corresponding relationship saved by the storage module; if the PCRF has been selected, instructing the storage module to join
  • the device further includes: an interaction module, configured to: after the storage module saves the corresponding relationship, send a gateway control session setup message to the selected PCRF, carrying the user identifier and the PDN identifier; And after receiving the gateway control session establishment confirmation message returned by the PCRF, forwarding the gateway control session establishment confirmation message to the BBERF, where the gateway control session establishment confirmation message carries a quality of service QoS rule and an event trigger; After the IP-CAN session establishment indication message that is sent by the PCEF and the assigned IP address is received, the corresponding relationship saved by the storage module is searched according to the user identifier and the PDN identifier in the IP-CAN session establishment indication message.
  • an interaction module configured to: after the storage module saves the corresponding relationship, send a gateway control session setup message to the selected PCRF, carrying the user identifier and the PDN identifier; And after receiving the gateway control session establishment confirmation message returned by the PCRF, forwarding the gateway control session establishment confirmation message to the BBERF, where the gateway control session establishment confirmation message carries
  • the subscription information obtaining module 901 is configured to: receive an IP-CAN session establishment indication message from the PCEF, and search for the storage module according to the user identifier and the PDN identifier carried in the IP-CAN session establishment indication message. And storing the corresponding relationship, if the PCRF is not allocated, sending the user identifier and the PDN identifier to the SPR or the BOSS by using the subscription document request message; receiving the subscription information returned by the SPR or the BOSS, and obtaining the subscription information of the user from the subscription information Signing information for a specific business.
  • the device further includes: an interaction module, configured to: after the storage module saves the correspondence, carry the address of the selected PCRF in the redirect message sent to the PCEF.
  • an interaction module configured to: after the storage module saves the correspondence, carry the address of the selected PCRF in the redirect message sent to the PCEF.
  • the device further includes: an interaction module, configured to: after the storage module saves the correspondence, forward the IP-CAN session establishment indication message to the selected PCRF; After the IP-CAN session establishment confirmation message returned by the PCRF, the IP-CAN session establishment confirmation message is returned to the PCEF, and the IP-CAN session establishment confirmation message carries the PCC rule. Then and the event trigger.
  • an interaction module configured to: after the storage module saves the correspondence, forward the IP-CAN session establishment indication message to the selected PCRF; After the IP-CAN session establishment confirmation message returned by the PCRF, the IP-CAN session establishment confirmation message is returned to the PCEF, and the IP-CAN session establishment confirmation message carries the PCC rule. Then and the event trigger.
  • 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.
  • 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.
  • the device/function module/functional unit in the above embodiment When the 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 technical solution of the embodiment of the present invention can deploy one or a group of PCRFs in an existing PCRF domain to support processing of new services, and support different PCRF selections according to different services.

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Abstract

一种策略和计费规则功能的选择方法及装置，所述方法包括：直径路由代理DRA从用户签约数据库SPR或业务运营支持系统BOSS获取用户签约的特定业务的签约信息；所述DRA根据所述签约信息为UE或IP连接接入网络IP-CAN会话选择支持开展所述特定业务的策略和计费规则功能PCRF。本发明实施例能够支持根据不同的业务进行不同的PCRF选择。

Description

一种策略和计费规则功能的选择方法及装置 技术领域
本文涉及通信领域，特别涉及一种策略和计费规则功能的选择方法及装置。
背景技术
图1是相关技术中第三代合作伙伴计划(3rd Generation Partnership Project，简称为3GPP)定义的策略和计费控制架构(Policy and Charging Control，简称为PCC)示意图，如图1所示，策略和计费规则功能(Policy and Charging Rules Function，简称为PCRF)是整个PCC架构的核心。PCRF制定所述控制策略需要结合从应用功能(Application Function，简称为AF)接收的业务信息，从用户签约数据库(Subscription Profile Repository，简称为SPR)接收的用户签约信息，运营商配置的策略等。PCRF将为业务制定的控制策略下发给策略和计费执行功能(Policy and Charging Enforcement Function，简称为PCEF)或者承载绑定和事件上报功能(Bearer Binding and Event Report Function，简称为BBERF)执行。同时PCRF可以向PCEF和/或BBERF订阅承载层相关事件，以便当承载层发生所述事件时及时感知，并更改控制策略。PCEF也可以支持应用检测控制功能。PCEF可以根据本地配置或是PCRF下发的包含应用标识的PCC规则进行应用检测并进行策略执行(如门控、重定向和带宽限制)。PCEF一般都位于网络的网关GW上，如EPS的分组数据网络网关(PDN-GW)，连接OCS(在线计费系统)及OFCS(离线计费系统)。此外，网络还可以通过部署独立业务检测功能(Traffic Detection Function，简称为TDF)来实现应用检测控制。TDF与PCRF通过Sd接口连接，TDF可以根据预先配置的或PCRF下发的应用检测控制(Application Detection and Control，简称为ADC)规则进行应用检测和策略执行。
在相关技术中，一个公共陆地移动网络PLMN中通常部署有多个PCRF，此时DRA(Diameter Routing Agent，直径路由代理)将负责管理这些 PCRF，并确保跟一个IP-CAN(IP连接接入网络)会话或一个UE(User Equipment，用户设备，即终端)相关的所有策略控制会话(如Gx、Gxx、Sd会话)都关联到同一个PCRF。相关技术中的假设是这多个PCRF具有相同的能力(此时DRA通常可以根据UE的号段、IP地址或者各PCRF的负荷信息的选择PCRF)。因此，DRA不需要考虑PCRF不同的业务处理能力来为UE或IP-CAN会话选择PCRF。
但是在一些应用场景中，当运营商需要开展一种新的业务的时候(譬如红包业务)或者运营商在已有业务网络以及PCC架构之上部署了新的数据智能网络，运营商如何在不改变已有业务网络以及PCC架构的情况下进行业务开展还有待解决。
发明内容
本文提供一种支持根据不同的业务进行不同的PCRF选择的方法和装置。
一种策略和计费规则功能的选择方法，包括：
直径路由代理DRA从用户签约数据库SPR或业务运营支持系统BOSS获取用户签约的特定业务的签约信息；
所述DRA根据所述签约信息为UE或IP连接接入网络IP-CAN会话选择支持开展所述特定业务的策略和计费规则功能PCRF。
可选地，所述DRA根据所述签约信息为UE或IP-CAN会话选择支持开展所述特定业务的PCRF包括：
所述DRA根据所述签约信息确定用户签约的特定业务；
所述DRA根据配置的PCRF与所支持开展的特定业务之间的对应关系，选择支持开展所确定的特定业务的PCRF；
当网络中部署了一组PCRF支持所述特定业务开展时，所述DRA选择这组PCRF中的任一个PCRF。
可选地，所述DRA根据所述签约信息为UE或IP-CAN会话选择支持开展所述特定业务的PCRF后还包括：
所述DRA保存所述用户标识、分组数据网PDN标识和所选择的PCRF的地址之间的对应关系。
可选地，所述DRA从SPR或BOSS获取用户签约的特定业务的签约信息包括：
所述DRA从承载绑定和事件上报功能BBERF接收网关控制会话建立消息；
所述DRA根据所述网关控制会话建立消息中携带的用户标识和PDN标识，查找所保存的所述对应关系，如果未分配过PCRF，则通过签约文档请求消息发送所述用户标识和分组数据网PDN标识给SPR或BOSS；
所述DRA接收所述SPR或BOSS返回的签约信息，从中获取所述用户签约的特定业务的签约信息。
可选地，所述DRA保存用户标识、PDN标识和所选择的PCRF的地址之间的对应关系的步骤后还包括：
所述DRA在发送给所述BBERF的重定向消息中携带所选择的PCRF的地址；
所述DRA当收到策略和计费执行功能PCEF发送的携带有所分配的IP地址的IP-CAN会话建立指示消息后，根据所述IP-CAN会话建立指示消息中携带的用户标识和PDN标识查找保存的所述对应关系；如果已经选择了PCRF，则在所保存的所述对应关系中加入所述IP地址；向所述PCEF返回携带所选择的PCRF地址的重定向消息。
可选地，所述DRA保存用户标识、PDN标识和所选择的PCRF的地址之间的对应关系的步骤后还包括：
所述DRA向所选择的PCRF发送网关控制会话建立消息，携带用户标识和PDN标识；
所述DRA当收到所述PCRF返回的网关控制会话建立确认消息后，向所述BBERF转发网关控制会话建立确认消息，所述网关控制会话建立确认消息中携带服务质量QoS规则和事件触发器；
所述DRA当收到PCEF发送的携带有所分配的IP地址的IP-CAN会话建 立指示消息后，根据所述IP-CAN会话建立指示消息中携带的用户标识和PDN标识查找保存的所述对应关系；如果已经选择了PCRF，则在所保存的所述对应关系中加入所述IP地址；向所选择的PCRF转发所述IP-CAN会话建立指示消息，携带所述用户标识、PDN标识和IP地址；向所述PCEF返回IP-CAN会话建立确认消息。
可选地，所述DRA从SPR或BOSS获取用户签约的特定业务的签约信息包括：
所述DRA从PCEF接收IP-CAN会话建立指示消息；
所述DRA根据所述IP-CAN会话建立指示消息中携带的用户标识和PDN标识，查找所保存的对应关系，如果未分配过PCRF，则通过签约文档请求消息发送所述用户标识和PDN标识给SPR或BOSS；
所述DRA接收所述SPR或BOSS返回的签约信息，从中获取所述用户签约的特定业务的签约信息。
可选地，所述DRA保存用户标识、PDN标识和所选择的PCRF的地址之间的对应关系的步骤后还包括：
所述DRA在发送给所述PCEF的重定向消息中携带所选择的PCRF的地址。
可选地，所述DRA保存用户标识、PDN标识和所选择的PCRF的地址之间的对应关系的步骤后还包括：
所述DRA将所述IP-CAN会话建立指示消息转发给所选择的PCRF；
所述DRA当收到所述PCRF返回的IP-CAN会话建立确认消息后，向所述PCEF返回所述IP-CAN会话建立确认消息，所述IP-CAN会话建立确认消息中携带策略和计费控制架构PCC规则和事件触发器。
一种策略和计费规则功能的选择装置，设置于直径路由代理DRA中，包括：
签约信息获取模块，设置为：从用户签约数据库SPR或业务运营支持系统BOSS获取用户签约的特定业务的签约信息；
选择模块，设置为：根据所述签约信息为UE或IP连接接入网络IP-CAN会话选择支持开展所述特定业务的策略和计费规则功能PCRF。
可选地，所述选择模块是设置为：
根据所述签约信息确定用户签约的特定业务；根据配置的PCRF与所支持开展的特定业务之间的对应关系，选择支持开展所确定的特定业务的PCRF；当网络中部署了一组PCRF支持所述特定业务开展时，选择这组PCRF中的任一个PCRF。
可选地，所述的装置还包括：
存储模块，设置为：在所述选择模块根据所述签约信息为UE或IP-CAN会话选择支持开展所述特定业务的PCRF后，保存所述用户标识、分组数据网PDN标识和所选择的PCRF的地址之间的对应关系。
可选地，所述签约信息获取模块是设置为：
从承载绑定和事件上报功能BBERF接收网关控制会话建立消息；根据所述网关控制会话建立消息中携带的用户标识和PDN标识，查找所述存储模块保存的对应关系，如果未分配过PCRF，则通过签约文档请求消息发送所述用户标识和分组数据网PDN标识给SPR或BOSS；接收所述SPR或BOSS返回的签约信息，从中获取所述用户签约的特定业务的签约信息。
可选地，所述的装置还包括：
交互模块，设置为：在所述存储模块保存所述对应关系后，在发送给所述BBERF的重定向消息中携带所选择的PCRF的地址；当收到策略和计费执行功能PCEF发送的携带有所分配的IP地址的IP-CAN会话建立指示消息后，根据所述IP-CAN会话建立指示消息中携带的用户标识和PDN标识查找所述存储模块保存的所述对应关系；如果已经选择了PCRF，则指示所述存储模块在所保存的所述对应关系中加入所述IP地址；向所述PCEF返回携带所选择的PCRF地址的重定向消息。
可选地，所述的装置还包括：
交互模块，设置为：在所述存储模块保存所述对应关系后，向所选择的PCRF发送网关控制会话建立消息，携带所述用户标识和PDN标识；当收到 所述PCRF返回的网关控制会话建立确认消息后，向所述BBERF转发所述网关控制会话建立确认消息，所述网关控制会话建立确认消息中携带服务质量QoS规则和事件触发器；当收到PCEF发送的携带有所分配的IP地址的IP-CAN会话建立指示消息后，根据所述IP-CAN会话建立指示消息中的用户标识和PDN标识查找所述存储模块保存的所述对应关系；如果已经选择了PCRF，则指示所述存储模块在所保存的所述对应关系中加入所述IP地址；向所选择的PCRF转发所述IP-CAN会话建立指示消息，携带所述用户标识、PDN标识和IP地址；向所述PCEF返回IP-CAN会话建立确认消息。
可选地，所述签约信息获取模块是设置为：
所述签约信息获取模块从PCEF接收IP-CAN会话建立指示消息；根据所述IP-CAN会话建立指示消息中携带的用户标识和PDN标识，查找所述存储模块保存的所述对应关系，如果未分配过PCRF，则通过签约文档请求消息发送所述用户标识和PDN标识给SPR或BOSS；接收所述SPR或BOSS返回的签约信息，从中获取所述用户签约的特定业务的签约信息。
可选地，所述的装置还包括：
交互模块，设置为：在所述存储模块保存所述对应关系后，在发送给PCEF的重定向消息中携带所选择的PCRF的地址。
可选地，所述的装置还包括：
交互模块，设置为：在所述存储模块保存所述对应关系后，将所述IP-CAN会话建立指示消息转发给所选择的PCRF；当收到所述PCRF返回的IP-CAN会话建立确认消息后，向所述PCEF返回所述IP-CAN会话建立确认消息，所述IP-CAN会话建立确认消息中携带PCC规则和事件触发器。
本发明实施例的技术方案可以在已有的PCRF域中部署一个或一组PCRF以支持处理新业务开展，支持根据不同的业务进行不同的PCRF选择。
附图概述
图1为3GPP演进分组系统结构示意图；
图2为本发明实施例策略和计费规则功能的选择方法的流程图；
图3为本发明实施例的架构一的示意图；
图4为本发明实施例的架构二的示意图；
图5为本发明实施例PCRF的选择方法实施例一的流程图；
图6为本发明实施例PCRF的选择方法实施例二的流程图；
图7为本发明实施例PCRF的选择方法实施例三的流程图；
图8为本发明实施例PCRF的选择方法实施例四的流程图；
图9为本发明实施例的一种策略和计费规则功能的选择装置的组成示意图。
本发明的实施方式
下面将结合附图及实施例对进行详细的说明。
本发明实施例的一种策略和计费规则功能的选择方法，如图2所示，包括：
步骤101，DRA从SPR或BOSS(Business and Operation Support System，业务运营支持系统)获取用户签约的特定业务的签约信息；
步骤102，DRA根据所述签约信息为UE或IP-CAN会话选择支持开展所述特定业务的PCRF。
如图3所示，为本发明实施例的架构一。在架构一中，DRA负责管理PCRF域中的PCRF，DRA的实现方式可以是重定向代理(Redirect Agent)也可以是Proxy代理(Proxy Agent)。该域中PCRF的数量为2个或2个以上(比如图3中的PCRF1和PCRF2)。SPR中保存着用户签订的特定业务的签约信息。DRA与SPR之间存在接口Sq进行交互,用户签订的特定的业务签约信息。PCRF客户端(如BBERF，PCEF以及AF)与DRA进行交互以选择该域中的支持这个特定业务的PCRF。
如图4所示，为本发明实施例的架构二。这架构二中，DRA负责管理PCRF域中的PCRF，DRA的实现方式可以是重定向代理(Redirect Agent) 也可以是Proxy Agent(代理服务器代理)。该域中PCRF的数量为2个或2个以上(比如图4中的PCRF1和PCRF2)。BOSS中保存着用户签订的特定业务的签约信息。DRA与BOSS之间存在接口Sq进行交互,用户签订的特定的业务签约信息。PCRF客户端(如BBERF，PCEF以及AF)与DRA进行交互以选择该域中的支持这个特定业务的PCRF。
实施例一
本实施例描述的是用户从E-UTRAN(Evolved Universal Terrestrial Radio Access Network，演进的统一陆地无线接入网络)接入并且S-GW(服务网关)和P-GW(分组数据网关)之间采用PMIPv6协议、或UE从可信任非3GPP网络或不可信任非3GPP网络接入3GPP系统且A-GW(安全网关)/ePDG(演进的分组数据网关)与P-GW之间采用PMIPv6协议时，建立IP-CAN会话过程以及PCRF的选择流程。DRA为Redirect Agent，基于图3或图4所示的结构实现。图5为本发明实施例PCRF的选择方法实施例一的流程图，如图5所示，包括以下步骤401～417：
步骤401：UE通过E-UTRAN接入或从可信任非3GPP网络接入请求建立IP-CAN会话，S-GW或A-GW/ePDG收到请求建立IP-CAN会话的消息，消息中携带用户标识和PDN(分组数据网)标识；
步骤402：位于S-GW或A-GW/ePDG的BBERF向DRA发送网关控制会话建立消息，消息中携带用户标识和PDN标识；
步骤403：DRA根据用户标识和PDN标识查找本地保存的对应关系，发现没有为该用户标识或该用户标识和对应的PDN标识选择PCRF，则DRA向SPR或BOSS发送签约文档请求消息，消息中携带用户标识和PDN标识；
步骤404：SPR或BOSS根据用户标识返回签约信息，其中包括用户签约的特定业务的签约信息；
步骤405：DRA保存签约信息，根据所述签约信息确定用户签约的特定业务；
步骤406：DRA根据用户签约的特定业务，并且根据DRA上的配置(即 PCRF与所支持开展的特定业务之间的对应关系)，为UE或IP-CAN会话选择一个支持开展所述特定业务的PCRF，保存用户标识、PDN标识、和所选择的PCRF的地址之间的对应关系，在发送给BBERF的重定向消息中携带所选择的PCRF的地址；
当网络中部署了一组PCRF支持所述特定业务开展时，那么DRA将选择这组PCRF中的任一个PCRF。
步骤407：BBERF向PCRF发送网关控制会话建立消息，消息中携带用户标识和PDN标识；
步骤408：PCRF向SPR发送签约文档请求消息，消息中携带用户标识和PDN标识；
步骤409：SPR返回签约信息；
步骤410：PCRF根据签约信息、网络策略、接入网信息等制定策略，如PCC规则、QoS规则和事件触发器等；PCRF向BBERF返回网关控制会话建立确认消息，携带QoS规则和事件触发器；BBERF安装策略；
步骤411：BBERF所在网关向PCEF所在网关发送请求建立IP-CAN会话，消息中携带用户标识和PDN标识；PCEF所在网关为所建立的IP-CAN会话分配IP Address；
步骤412：PCEF向DRA发送IP-CAN会话建立指示消息，消息中携带用户标识、PDN标识和所分配的IP Address(地址)；
步骤413：DRA根据用户标识和PDN标识查找保存的对应关系，发现已经为该IP-CAN会话或UE选择了PCRF，则更新对应关系(用户标识、PDN标识、IP Address、PCRF地址)。DRA向PCEF返回重定向消息，携带PCRF地址；
步骤414：PCEF向PCRF发送IP-CAN会话建立指示消息，消息中携带用户标识、PDN标识和IP Address；
步骤415：PCRF根据用户标识和PDN标识返回对应的步骤410制定的PCC规则和事件触发器；
步骤416：PCEF所在网关向BBERF所在网关返回应答建立IP-CAN会 话，携带IP Address；
步骤417：BBERF所在网关返回应答建立IP-CAN会话，携带IP Address。
经过上述流程，DRA为该UE或IP-CAN会话选择了一个支持开展用户签约的特定业务的PCRF，当用户开展这种特定业务时，PCRF根据用户签约的特定业务的签约信息制定策略。
实施例二
本实施例描述的是UE在非漫游场景下，从E-UTRAN接入并且S-GW和P-GW之间采用GTP((GPRS Tunnel Protocol，通用分组无线服务技术隧道协议)协议、或UE从可信任非3GPP网络或不可信任非3GPP网络接入3GPP系统且A-GW/ePDG与P-GW之间采用GTP协议时，建立IP-CAN会话过程以及PCRF的选择流程。DRA为Redirect Agent，基于图3或图4所示的结构实现。图6为本发明实施例的PCRF的选择方法实施例二的流程图，包括以下步骤501～511：
步骤501：UE通过E-UTRAN或非3GPP接入EPS系统，P-GW收到请求建立IP-CAN会话的消息，消息中携带用户标识和PDN标识；
步骤502：位于P-GW的PCEF向DRA发送IP-CAN会话建立指示消息，消息中携带用户标识和PDN标识；
步骤503：DRA根据用户标识和PDN标识查找本地保存的对应关系，发现没有为该用户或该用户和对应的PDN标识选择PCRF，则DRA向SPR或BOSS发送签约文档请求消息，消息中携带用户标识和PDN标识；
步骤504：SPR或BOSS根据用户标识返回签约信息，其中包括用户签约的特定业务的签约信息；
步骤505：DRA保存签约信息，根据所述签约信息确定用户签约的特定业务；
步骤506：DRA根据用户签约的特定业务，并且根据DRA上的配置(即PCRF与所支持开展的特定业务之间的对应关系)，为UE或IP-CAN会话选 择一个支持开展所述特定业务的PCRF，保存用户标识、PDN标识、和所选择的PCRF的地址之间的对应关系，在发送给PCEF的重定向消息中携带所选择的PCRF的地址；
当网络中部署了一组PCRF支持所述特定业务开展时，那么DRA将选择这组PCRF中的任一个PCRF。
步骤507：PCEF向PCRF发送IP-CAN会话建立指示消息，消息中携带用户标识、PDN标识和IP Address；
步骤508：PCRF向SPR发送签约文档请求消息，消息中携带用户标识和PDN标识；
步骤509：SPR返回签约信息；
步骤510：PCRF根据签约信息、网络策略、接入网信息等制定策略，如PCC规则和事件触发器等。PCRF向PCEF返回IP-CAN会话建立确认消息，携带PCC规则和事件触发器；PCEF安装策略；
步骤511：P-GW返回应答建立IP-CAN会话，携带IP Address。
经过上述流程，DRA为该UE或IP-CAN会话选择了一个支持开展用户签约的特定业务的PCRF，当用户开展这种特定业务时，PCRF根据用户签约的特定业务的签约信息制定策略。
实施例三
本实施例描述的是用户从E-UTRAN接入并且S-GW和P-GW之间采用PMIPv6协议、或UE从可信任非3GPP网络或不可信任非3GPP网络接入3GPP系统且A-GW/ePDG与P-GW之间采用PMIPv6协议时，建立IP-CAN会话过程以及PCRF的选择流程。DRA为Proxy Agent，基于图3或图4所示的结构实现。图7为本发明实施例PCRF的选择方法实施例三的流程图，包括以下步骤601～617：
步骤601：UE通过E-UTRAN接入或从可信任非3GPP网络接入请求建立IP-CAN会话，S-GW或可信任非3GPP接入网关(A-GW)收到请求建立IP-CAN会话的消息，消息中携带用户标识和PDN标识；
步骤602：位于S-GW或A-GW的BBERF向DRA发送网关控制会话建立消息，消息中携带用户标识和PDN标识；
步骤603：DRA根据用户标识和PDN标识查找本地保存的对应关系，发现没有为该用户或该用户和对应的PDN标识选择PCRF，则DRA向SPR或BOSS发送签约文档请求消息，消息中携带用户标识和PDN标识；
步骤604：SPR或BOSS根据用户标识返回签约信息，其中包括用户签约的特定业务的签约信息；
步骤605：DRA保存签约信息，根据所述签约信息确定用户签约的特定业务；
步骤606：DRA根据用户签约的特定业务，并且根据DRA上的配置(即PCRF与所支持开展的特定业务之间的对应关系)，为UE或IP-CAN会话选择一个支持开展所述特定业务的PCRF，保存用户标识、PDN标识、和所选择的PCRF的地址之间的对应关系，DRA向所选择的PCRF发送网关控制会话建立消息，消息中携带用户标识和PDN标识；
当网络中部署了一组PCRF支持所述特定业务开展时，那么DRA将选择这组PCRF中的任一个PCRF。
步骤607：PCRF向SPR发送签约文档请求消息，消息中携带用户标识和PDN标识；
步骤608：SPR返回签约信息；
步骤609：PCRF根据签约信息、网络策略、接入网信息等制定策略，如PCC规则、QoS规则和事件触发器等。PCRF向DRA返回网关控制会话建立确认消息，携带QoS规则和事件触发器。
步骤610：DRA向BBERF转发网关控制会话建立确认消息，携带QoS规则和事件触发器；BBERF安装策略；
步骤611：BBERF所在网关向PCEF所在网关发送请求建立IP-CAN会话，消息中携带用户标识和PDN标识；PCEF所在网关为所建立的IP-CAN会话分配IP Address；
步骤612：PCEF向DRA发送IP-CAN会话建立指示消息，消息中携带 用户标识、PDN标识和所分配的IP Address；
步骤613：DRA根据用户标识和PDN标识查找保存信息，发现已经为该IP-CAN会话或UE选择了PCRF，则更新对应关系(用户标识、PDN标识、IP Address、PCRF地址)。DRA向所选择的PCRF转发IP-CAN会话建立指示消息，携带用户标识、PDN标识和IP地址；
步骤614：PCRF根据用户标识和PDN标识返回对应的步骤609制定的PCC规则和事件触发器；
步骤615：DRA向PCEF返回IP-CAN会话建立确认消息；
步骤616：PCEF所在网关向BBERF所在网关返回应答建立IP-CAN会话，携带IP Address；
步骤617：BBERF所在网关返回应答建立IP-CAN会话，携带IP Address。
经过上述流程，DRA为该UE或IP-CAN会话选择了一个支持开展用户签约的特定业务的PCRF，当用户开展这种特定业务时，PCRF根据用户签约的特定业务的签约信息制定策略。
实施例四
本实施例描述的是UE在非漫游场景下，从E-UTRAN接入并且S-GW和P-GW之间采用GTP协议、或UE从可信任非3GPP网络或不可信任非3GPP网络接入3GPP系统且A-GW/ePDG与P-GW之间采用GTP协议时，建立IP-CAN会话过程以及PCRF的选择流程。DRA为Proxy Agent，基于图3或图4所示的结构实现。图8为本发明实施例的PCRF的选择方法实施例四的流程图，包括以下步骤701～711：
步骤701：UE通过E-UTRAN或非3GPP网络接入EPS系统，P-GW收到请求建立IP-CAN会话的消息，消息中携带用户标识和PDN标识；
步骤702：位于P-GW的PCEF向DRA发送IP-CAN会话建立指示消息，消息中携带用户标识，PDN标识和IP地址；
步骤703：DRA根据用户标识和PDN标识查找本地保存的对应关系，发 现没有为该用户或该用户和对应的PDN标识选择PCRF，则DRA向SPR或BOSS发送签约文档请求消息，消息中携带用户标识和PDN标识；
步骤704：SPR或BOSS根据用户标识返回签约信息，其中包括用户签约的特定业务的签约信息；
步骤705：DRA保存签约信息，根据所述签约信息确定用户签约的特定业务；
步骤706：DRA根据用户签约的特定业务，并且根据DRA上的配置(即PCRF与所支持开展的特定业务之间的对应关系)，为UE或IP-CAN会话选择一个支持开展业务的PCRF，保存用户标识、PDN标识、IP地址、和所选择的PCRF的地址之间的对应关系。DRA将IP-CAN会话建立指示消息转发给这个PCRF；
当网络中部署了一组PCRF支持所述特定业务开展时，那么DRA将选择这组PCRF中的任一个PCRF。
步骤707：PCRF向SPR发送签约文档请求消息，消息中携带用户标识和PDN标识；
步骤708：SPR返回签约信息；
步骤709：PCRF根据签约信息、网络策略、接入网信息等制定策略，如PCC规则和事件触发器等。PCRF向DRA返回IP-CAN会话建立确认消息，携带PCC规则和事件触发器。
步骤710：DRA向PCEF返回IP-CAN会话建立确认消息，消息中携带PCC规则和事件触发器；PCEF安装策略；
步骤711：P-GW返回应答建立IP-CAN会话，携带IP Address。
经过上述流程，DRA为该UE或IP-CAN会话选择了一个支持开展用户签约的特定业务的PCRF，当用户开展这种特定业务时，PCRF根据用户签约的特定业务的签约信息制定策略。
在以上所有实施例中，通过对DRA的增强支持DRA与SPR/BOSS互通获取特定业务的签约信息后，为UE或IP-CAN会话选择支持特定业务开展的 PCRF。在其他实施例中，也可以通过以下方式实现：在当前的DRA的后面部署一个eDRA(演进的DRA)，该eDRA可与SPR/BOSS互通获取特定业务的签约信息。若用户没有特定业务的签约信息，那么eDRA将选择一个普通的PCRF；若用户有特定业务的签约信息，eDRA将选择一个支持相应特定业务开展的PCRF。流程与图5～图8类似，不再赘述。
如图9所示，一种策略和计费规则功能的选择装置，设置于直径路由代理DRA中，包括：
签约信息获取模块901，设置为：从用户签约数据库SPR或业务运营支持系统BOSS获取用户签约的特定业务的签约信息；
选择模块902，设置为：根据所述签约信息为UE或IP连接接入网络IP-CAN会话选择支持开展所述特定业务的策略和计费规则功能PCRF。
可选地，所述选择模块902是设置为：根据所述签约信息确定用户签约的特定业务；根据配置的PCRF与所支持开展的特定业务之间的对应关系，选择支持开展所确定的特定业务的PCRF；当网络中部署了一组PCRF支持所述特定业务开展时，选择这组PCRF中的任一个PCRF。
可选地，所述装置还包括：存储模块，设置为：在所述选择模块902根据所述签约信息为UE或IP-CAN会话选择支持开展所述特定业务的PCRF后，保存用户标识、分组数据网PDN标识和所选择的PCRF的地址之间的对应关系。
可选地，所述签约信息获取模块901是设置为：从承载绑定和事件上报功能BBERF接收网关控制会话建立消息；根据所述网关控制会话建立消息中携带的用户标识和PDN标识，查找所述存储模块保存的对应关系，如果未分配过PCRF，则通过签约文档请求消息发送所述用户标识和分组数据网PDN标识给SPR或BOSS；接收所述SPR或BOSS返回的签约信息，从中获取所述用户签约的特定业务的签约信息。
可选地，所述装置还包括：交互模块，设置为：在所述存储模块保存所述对应关系后，在发送给所述BBERF的重定向消息中携带所选择的PCRF的 地址；当收到策略和计费执行功能PCEF发送的携带有所分配的IP地址的IP-CAN会话建立指示消息后，根据所述IP-CAN会话建立指示消息中携带的用户标识和PDN标识查找所述存储模块保存的所述对应关系；如果已经选择了PCRF，则指示所述存储模块在所保存的所述对应关系中加入所述IP地址；向所述PCEF返回携带所选择的PCRF地址的重定向消息。
可选地，所述装置还包括：交互模块，设置为：在所述存储模块保存所述对应关系后，向所选择的PCRF发送网关控制会话建立消息，携带所述用户标识和PDN标识；当收到所述PCRF返回的网关控制会话建立确认消息后，向所述BBERF转发所述网关控制会话建立确认消息，所述网关控制会话建立确认消息中携带服务质量QoS规则和事件触发器；当收到PCEF发送的携带有所分配的IP地址的IP-CAN会话建立指示消息后，根据所述IP-CAN会话建立指示消息中的用户标识和PDN标识查找所述存储模块保存的所述对应关系；如果已经选择了PCRF，则指示所述存储模块在所保存的所述对应关系中加入所述IP地址；向所选择的PCRF转发所述IP-CAN会话建立指示消息，携带所述用户标识、PDN标识和IP地址；向所述PCEF返回IP-CAN会话建立确认消息。
可选地，所述签约信息获取模块901是设置为：从PCEF接收IP-CAN会话建立指示消息；根据所述IP-CAN会话建立指示消息中携带的用户标识和PDN标识，查找所述存储模块保存的所述对应关系，如果未分配过PCRF，则通过签约文档请求消息发送所述用户标识和PDN标识给SPR或BOSS；接收所述SPR或BOSS返回的签约信息，从中获取所述用户签约的特定业务的签约信息。
可选地，所述装置还包括：交互模块，设置为：在所述存储模块保存所述对应关系后，在发送给PCEF的重定向消息中携带所选择的PCRF的地址。
可选地，所述装置还包括：交互模块，设置为：在所述存储模块保存所述对应关系后，将所述IP-CAN会话建立指示消息转发给所选择的PCRF；当收到所述PCRF返回的IP-CAN会话建立确认消息后，向所述PCEF返回所述IP-CAN会话建立确认消息，所述IP-CAN会话建立确认消息中携带PCC规 则和事件触发器。
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。
上述实施例中的装置/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。
工业实用性
本发明实施例的技术方案可以在已有的PCRF域中部署一个或一组PCRF以支持处理新业务开展，支持根据不同的业务进行不同的PCRF选择。

Claims (19)

  1. 一种策略和计费规则功能的选择方法，包括：
    直径路由代理DRA从用户签约数据库SPR或业务运营支持系统BOSS获取用户签约的特定业务的签约信息；
    所述DRA根据所述签约信息为UE或IP连接接入网络IP-CAN会话选择支持开展所述特定业务的策略和计费规则功能PCRF。
  2. 如权利要求1所述的方法，其中，所述DRA根据所述签约信息为UE或IP-CAN会话选择支持开展所述特定业务的PCRF包括：
    所述DRA根据所述签约信息确定用户签约的特定业务；
    所述DRA根据配置的PCRF与所支持开展的特定业务之间的对应关系，选择支持开展所确定的特定业务的PCRF；
    当网络中部署了一组PCRF支持所述特定业务开展时，所述DRA选择这组PCRF中的任一个PCRF。
  3. 如权利要求1或2所述的方法，所述DRA根据所述签约信息为UE或IP-CAN会话选择支持开展所述特定业务的PCRF后还包括：
    所述DRA保存所述用户标识、分组数据网PDN标识和所选择的PCRF的地址之间的对应关系。
  4. 如权利要求3所述的方法，其中，所述DRA从SPR或BOSS获取用户签约的特定业务的签约信息包括：
    所述DRA从承载绑定和事件上报功能BBERF接收网关控制会话建立消息；
    所述DRA根据所述网关控制会话建立消息中携带的用户标识和PDN标识，查找所保存的所述对应关系，如果未分配过PCRF，则通过签约文档请求消息发送所述用户标识和分组数据网PDN标识给SPR或BOSS；
    所述DRA接收所述SPR或BOSS返回的签约信息，从中获取所述用户签约的特定业务的签约信息。
  5. 如权利要求4所述的方法，所述DRA保存用户标识、PDN标识和所选择的PCRF的地址之间的对应关系的步骤后还包括：
    所述DRA在发送给所述BBERF的重定向消息中携带所选择的PCRF的地址；
    所述DRA当收到策略和计费执行功能PCEF发送的携带有所分配的IP地址的IP-CAN会话建立指示消息后，根据所述IP-CAN会话建立指示消息中携带的用户标识和PDN标识查找保存的所述对应关系；如果已经选择了PCRF，则在所保存的所述对应关系中加入所述IP地址；向所述PCEF返回携带所选择的PCRF地址的重定向消息。
  6. 如权利要求4所述的方法，所述DRA保存用户标识、PDN标识和所选择的PCRF的地址之间的对应关系的步骤后还包括：
    所述DRA向所选择的PCRF发送网关控制会话建立消息，携带用户标识和PDN标识；
    所述DRA当收到所述PCRF返回的网关控制会话建立确认消息后，向所述BBERF转发网关控制会话建立确认消息，所述网关控制会话建立确认消息中携带服务质量QoS规则和事件触发器；
    所述DRA当收到PCEF发送的携带有所分配的IP地址的IP-CAN会话建立指示消息后，根据所述IP-CAN会话建立指示消息中携带的用户标识和PDN标识查找保存的所述对应关系；如果已经选择了PCRF，则在所保存的所述对应关系中加入所述IP地址；向所选择的PCRF转发所述IP-CAN会话建立指示消息，携带所述用户标识、PDN标识和IP地址；向所述PCEF返回IP-CAN会话建立确认消息。
  7. 如权利要求3所述的方法，其中，所述DRA从SPR或BOSS获取用户签约的特定业务的签约信息包括：
    所述DRA从PCEF接收IP-CAN会话建立指示消息；
    所述DRA根据所述IP-CAN会话建立指示消息中携带的用户标识和PDN标识，查找所保存的对应关系，如果未分配过PCRF，则通过签约文档请求 消息发送所述用户标识和PDN标识给SPR或BOSS；
    所述DRA接收所述SPR或BOSS返回的签约信息，从中获取所述用户签约的特定业务的签约信息。
  8. 如权利要求7所述的方法，所述DRA保存用户标识、PDN标识和所选择的PCRF的地址之间的对应关系的步骤后还包括：
    所述DRA在发送给所述PCEF的重定向消息中携带所选择的PCRF的地址。
  9. 如权利要求7所述的方法，所述DRA保存用户标识、PDN标识和所选择的PCRF的地址之间的对应关系的步骤后还包括：
    所述DRA将所述IP-CAN会话建立指示消息转发给所选择的PCRF；
    所述DRA当收到所述PCRF返回的IP-CAN会话建立确认消息后，向所述PCEF返回所述IP-CAN会话建立确认消息，所述IP-CAN会话建立确认消息中携带策略和计费控制架构PCC规则和事件触发器。
  10. 一种策略和计费规则功能的选择装置，设置于直径路由代理DRA中，包括：
    签约信息获取模块，设置为：从用户签约数据库SPR或业务运营支持系统BOSS获取用户签约的特定业务的签约信息；
    选择模块，设置为：根据所述签约信息为UE或IP连接接入网络IP-CAN会话选择支持开展所述特定业务的策略和计费规则功能PCRF。
  11. 如权利要求10所述的装置，其中，所述选择模块是设置为：
    根据所述签约信息确定用户签约的特定业务；根据配置的PCRF与所支持开展的特定业务之间的对应关系，选择支持开展所确定的特定业务的PCRF；当网络中部署了一组PCRF支持所述特定业务开展时，选择这组PCRF中的任一个PCRF。
  12. 如权利要求10或11所述的装置，还包括：
    存储模块，设置为：在所述选择模块根据所述签约信息为UE或IP-CAN 会话选择支持开展所述特定业务的PCRF后，保存所述用户标识、分组数据网PDN标识和所选择的PCRF的地址之间的对应关系。
  13. 如权利要求12所述的装置，其中，所述签约信息获取模块是设置为：
    从承载绑定和事件上报功能BBERF接收网关控制会话建立消息；根据所述网关控制会话建立消息中携带的用户标识和PDN标识，查找所述存储模块保存的对应关系，如果未分配过PCRF，则通过签约文档请求消息发送所述用户标识和分组数据网PDN标识给SPR或BOSS；接收所述SPR或BOSS返回的签约信息，从中获取所述用户签约的特定业务的签约信息。
  14. 如权利要求13所述的装置，还包括：
    交互模块，设置为：在所述存储模块保存所述对应关系后，在发送给所述BBERF的重定向消息中携带所选择的PCRF的地址；当收到策略和计费执行功能PCEF发送的携带有所分配的IP地址的IP-CAN会话建立指示消息后，根据所述IP-CAN会话建立指示消息中携带的用户标识和PDN标识查找所述存储模块保存的所述对应关系；如果已经选择了PCRF，则指示所述存储模块在所保存的所述对应关系中加入所述IP地址；向所述PCEF返回携带所选择的PCRF地址的重定向消息。
  15. 如权利要求13所述的装置，还包括：
    交互模块，设置为：在所述存储模块保存所述对应关系后，向所选择的PCRF发送网关控制会话建立消息，携带所述用户标识和PDN标识；当收到所述PCRF返回的网关控制会话建立确认消息后，向所述BBERF转发所述网关控制会话建立确认消息，所述网关控制会话建立确认消息中携带服务质量QoS规则和事件触发器；当收到PCEF发送的携带有所分配的IP地址的IP-CAN会话建立指示消息后，根据所述IP-CAN会话建立指示消息中的用户标识和PDN标识查找所述存储模块保存的所述对应关系；如果已经选择了PCRF，则指示所述存储模块在所保存的所述对应关系中加入所述IP地址；向所选择的PCRF转发所述IP-CAN会话建立指示消息，携带所述用户标识、PDN标识和IP地址；向所述PCEF返回IP-CAN会话建立确认消息。
  16. 如权利要求12所述的装置，其中，所述签约信息获取模块是设置为：
    从PCEF接收IP-CAN会话建立指示消息；根据所述IP-CAN会话建立指示消息中携带的用户标识和PDN标识，查找所述存储模块保存的所述对应关系，如果未分配过PCRF，则通过签约文档请求消息发送所述用户标识和PDN标识给SPR或BOSS；接收所述SPR或BOSS返回的签约信息，从中获取所述用户签约的特定业务的签约信息。
  17. 如权利要求16所述的装置，还包括：
    交互模块，设置为：在所述存储模块保存所述对应关系后，在发送给PCEF的重定向消息中携带所选择的PCRF的地址。
  18. 如权利要求16所述的装置，还包括：
    交互模块，设置为：在所述存储模块保存所述对应关系后，将所述IP-CAN会话建立指示消息转发给所选择的PCRF；当收到所述PCRF返回的IP-CAN会话建立确认消息后，向所述PCEF返回所述IP-CAN会话建立确认消息，所述IP-CAN会话建立确认消息中携带PCC规则和事件触发器。
  19. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行权利要求1-9任一项的方法。
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