WO2013152655A1 - 一种融合网络中的策略控制方法及系统 - Google Patents

一种融合网络中的策略控制方法及系统 Download PDF

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Publication number
WO2013152655A1
WO2013152655A1 PCT/CN2013/072680 CN2013072680W WO2013152655A1 WO 2013152655 A1 WO2013152655 A1 WO 2013152655A1 CN 2013072680 W CN2013072680 W CN 2013072680W WO 2013152655 A1 WO2013152655 A1 WO 2013152655A1
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policy
bng
pcrf
bpcf
identifier
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PCT/CN2013/072680
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English (en)
French (fr)
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毕以峰
毛玉欣
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中兴通讯股份有限公司
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Publication of WO2013152655A1 publication Critical patent/WO2013152655A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M15/00Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/66Policy and charging system
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08Configuration management of networks or network elements
    • H04L41/0894Policy-based network configuration management

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a policy control method and system in a converged network. Background technique
  • the PCRF is the core of PCC (Policy and Charging Control) and is responsible for policy decision making and billing rules.
  • the PCRF provides network control rules based on service data flows, including traffic data flow detection, Gating Control, Quality of Service (QoS) control, and data flow based charging rules.
  • the PCRF sends the policies and charging rules to the PCEF (Policy and Charging Enforcement Function) entity.
  • the PCRF also needs to ensure that these rules are consistent with the user's subscription information.
  • the basis for formulating the policy and the charging rule by the PCRF includes: obtaining information related to the service from the AF (Application Function), and obtaining the subscription information of the user policy charging control from the Subscription Profile Repository (SPR); Obtain information about the bearer-related network from the PCEF, and the like.
  • EPS supports interworking with non-3GPP systems.
  • the interworking with the non-3GPP system is implemented through the S2a/b/c interface, and the P-GW serves as an anchor point between the 3GPP and the non-3GPP system.
  • the non-3GPP system is divided into trusted non-3GPP IP access and untrusted non-3GPP IP access.
  • Trusted non-3GPP IP access can be directly connected to the P-GW through the S2a interface, which uses PMIPv6 (Proxy Mobile IP version 6), Proxy Mobile IP Version 6 protocol or GTP (General Packet Radio Service Tunnel Protocol) protocol; Untrusted non-3GPP IP access needs to pass ePDG (Evolved Packet Data Gateway)
  • the packet data gateway is connected to the P-GW, and the interface between the ePDG and the P-GW is S2b, using PMIPv6 or GTP protocol, and IPSec is used between the UE (User Equipment, user equipment) and the ePDG.
  • S2c Internet Protocol Security, Internet Protocol Security Encrypts signaling and data.
  • S2c provides user plane-related control and mobility support between the UE and the P-GW.
  • the supported mobility management protocol is DSMIPv6 (Mobile IPv6 Support for Dual Stack Hosts and Routers, which supports dual-stack mobile IPv6).
  • the BBF access network is also referred to as a fixed network, and specifically refers to a wireless local area network (WLAN) access.
  • WLAN wireless local area network
  • the IPsec tunnel is established between the UE and the ePDG, or between the UE and the P-GW. Therefore, the outer header information of the IPsec tunnel can be used as the PCRF positioning BPCF (BBF Policy Control Function). ) , and the identification of the BPCF to locate the fixed line.
  • PCRF positioning BPCF BBF Policy Control Function
  • the ePDG or the P-GW can obtain the header information of the IPsec tunnel, and then send the information to the PCRF through the following path, and then send it to the BPCF:
  • the IPsec tunnel information is transmitted between the two network elements by means of the message on the interface in the corresponding figure.
  • the ePDG and the P-GW are created by using the GTP protocol on the S2b interface to create a session request message or PMIP.
  • Proxy binding request message for protocol between ePDG and PCRF
  • the session message is controlled by the creation gateway on the Gxb* interface; the IP-CAN session message is created between the P-GW and the PCRF through the Gx interface; the session between the PCRF and the BPCF is controlled by the creation gateway on the S9a interface.
  • Message is controlled by the creation gateway on the S9a interface.
  • the outer header information of the IPsec tunnel as a PCRF positioning fixed network gateway BNG ( BBF Network
  • BNG Gateway Broadband Forum Gateway
  • BRAS Broadband Forum Access Server
  • BNG/BRAS Location Fixed Line Identification BNG and BRAS refer to the same network element, sometimes called BNG, or BRAS.
  • the ePDG or P-GW can obtain the header information of the IPsec tunnel, and then send the information to the PCRF through the following path, and then send it to the BRAS: ePDG->P-GW->PCRF->BRAS ( GTP/PMIP-based S2b scenario);
  • the message between ePDG, PCRF, and P-GW is the same as that described in Architecture 1.
  • the IPF tunnel information is transmitted between the PCRF and the BRAS by creating a gateway control session message on the Gxd interface.
  • the outer header information of the IPsec tunnel is used as the policy control entity of the PCRF positioning fusion (referred to as PCRF+ in this paper) and the identifier of the PCRF+ positioning fixed network line.
  • PCRF+ is a policy control entity dedicated to managing fixed network resources; it is located between PCRF and PCRF+, and the interface between PCRF+ and BBF network gateway BRAS.
  • IF-1 interface 1
  • IF-2 interface 2
  • the ePDG or the P-GW can obtain the header information of the IPsec tunnel, and then send the information to the PCRF through the following path, and then send it to the PCRF+: ePDG->P-GW->PCRF->PCRF+ ( GTP/PMIP-based S2b scenario);
  • the message between the ePDG, the PCRF, and the P-GW is the same as that in the architecture 1.
  • the IPF tunnel information is transmitted between the PCRF and the PCRF+ through the session message on the IF-1 interface.
  • the outer header information of the IPsec tunnel is used as the identifier of the PCRF location BRAS, the BRAS location PCRF+, and the PCRF+ location fixed line.
  • the ePDG or P-GW can obtain the header information of the IPsec tunnel, and then send the information to the PCRF through the following path, and then send it to the BRAS and PCRF+:
  • ePDG->P-GW->PCRF->BRAS->PCRF+ GTP/PMIP-based S2b scenario
  • ePDG->PCRF->BRAS->PCRF+ PMIP-based S2b or untrusted S2c scenario
  • the message between ePDG, PCRF, and P-GW is the same as that in architecture 1.
  • the message between PCRF and BRAS is the same as that in architecture 2.
  • the message between BRAS and PCRF+ is transmitted through the session message on the IF-2 interface. IPsec tunnel information.
  • the S2a access is as described.
  • the BBF network is also called: TWAN (trusted WLAN access network).
  • TWAN trusted WLAN access network
  • the mobility technology research of S2a access of BBF network has been completed, but the related policy control mechanism has not been determined.
  • the TWAN is an access network, including multiple integrated or separate network elements, such as: TWAG (trusted WLAN access gateway), existing BRAS gateway, BPCF, and the like.
  • TWAG trusted WLAN access gateway
  • BPCF BPCF
  • S2a access can consider reusing S2b/S2c's policy control architecture, as shown in Figure 6-9.
  • the related art has the following problems: When S2b/S2c is accessed, there is an IPsec tunnel between the UE and the ePDG and the P-GW, and the corresponding IPsec tunnel information can be used to locate the fixed network line.
  • the technical problem to be solved by the present invention is to provide a policy control method and system in a converged network, which solves the problem of positioning a fixed network line and a policy control when a BBF access network is used as a trusted non-3GPP access network to access an EPC.
  • the present invention provides a policy control method in a converged network, when a fixed network accesses an evolved packet system as a trusted wireless local area network access network (TWAN),
  • TWAN trusted wireless local area network access network
  • the Policy and Charging Rules Function Entity locates to the Broadband Forum Policy Control Function Entity (BPCF) and the Fixed Network Gateway based on the location information sent by the Packet Data Network Gateway (P-GW) or the Trusted WLAN Access Gateway (TWAG).
  • BPCF Broadband Forum Policy Control Function Entity
  • P-GW Packet Data Network Gateway
  • TWAG Trusted WLAN Access Gateway
  • a BNG or a fused policy control entity, establishing a policy session with the BPCF, the BNG, or the fused policy control entity, and transmitting the terminal identifier to the BPCF, the BNG, or the fused policy control entity ;
  • the BPCF, the BNG, or the fused policy control entity locates the fixed network line corresponding to the policy session according to the terminal identifier.
  • the method further includes:
  • the BPCF, the BNG, or the fused policy control entity After the positioning of the fixed network line corresponding to the policy session, the BPCF, the BNG, or the fused policy control entity authorizes the policy delivered by the PCRF, or executes a policy.
  • the positioning information is sent by the BNG, or sent by the General Packet Radio Service Tunneling Protocol (GTP) endpoint or a Mobile Access Gateway (MAG) other than the BNG to the P-GW, by the P - GW is sent to the PCRF; or the positioning information is sent by the TWAG to the PCRF.
  • GTP General Packet Radio Service Tunneling Protocol
  • MAG Mobile Access Gateway
  • the positioning information includes:
  • the address or domain name or identifier of the MAG is the address or domain name or identifier of the MAG.
  • the method further includes:
  • the PCRF 4 locates the BPCF according to the positioning information, establishes a policy session with the BPCF, and sends the terminal identifier to the BPCF;
  • the BPCF is configured according to the terminal identifier, and the terminal accessed from the BNG
  • the mapping between the established terminal identifier and the fixed network line is used to locate the fixed network execution policy corresponding to the policy session.
  • the method further includes:
  • the PCRF locates the BNG according to the positioning information, establishes a policy session with the BNG, and sends the terminal identifier to the BNG;
  • the BNG delivers the BNG to the PCRF according to the terminal identifier and the corresponding relationship between the terminal identifier and the fixed network line established by the terminal, and after the positioning to the fixed network line corresponding to the policy session.
  • the strategy is to authorize, or to enforce the strategy.
  • the method further includes:
  • the PCRF locates the fused policy control entity according to the location information, establishes a policy session with the fused policy control entity, and sends the terminal identifier to the fused policy control entity;
  • the merging policy control entity locates the fixed network line corresponding to the policy session according to the terminal identifier and the correspondence between the terminal identifier established by the BNG and the fixed network line established by the terminal access And the fused policy control entity authorizes the policy delivered by the PCRF, or executes the policy.
  • the BPCF or the fused policy control entity learns, from the BNG, the correspondence between the terminal identifier established by the terminal access and the fixed network line by:
  • the BNG After the BNG learns the corresponding relationship between the terminal identifier and the fixed network line, the BNG establishes a local policy session or the stateless session signaling by using the BPCF or the fused policy control entity. The corresponding relationship between the terminal identifier and the fixed network line is sent to the BPCF or the fused policy control entity;
  • the BPCF or the fused policy control entity obtains the correspondence between the terminal identifier and the fixed network line from the BNG after receiving the terminal identifier from the PCRF.
  • the BNG, the GTP endpoint or the MAG sends the positioning information to the P-GW in the following manner:
  • the message or the PBU message carries the cell that includes the positioning information
  • the location information is included in the header information of the create session request message or the PBU message sent to the P-GW, and the P-GW parses the location information.
  • the positioning information includes:
  • the service set identifier SSID used by the user equipment UE;
  • Geographic location information of the user equipment UE or
  • the basic service set identifies the BSSID.
  • the present invention also provides a policy control method in a converged network, when the fixed network is used as a TWAN access evolved packet system,
  • the PCRF locates the fixed network gateway according to the positioning information sent by the received P-GW or TWAG.
  • BNG performing policy signaling interaction with the BNG, and sending the terminal identifier to the BNG
  • the BNG locates the fixed network line according to the terminal identifier.
  • the method further includes:
  • the BNG sends the policy delivered by the PCRF to the fused policy control entity, and the fused policy control entity authorizes the policy delivered by the PCRF, and then sends the policy to the BNG for execution.
  • the positioning information is sent by the BNG, or sent by the GTP endpoint or the MAG to the P-GW; or the positioning information is sent by the TWAG to the PCRF;
  • the location information includes: an address or a domain name or an identifier of the BNG; an address or a domain name or an identifier of the GTP endpoint; an address or a domain name or an identifier of the MAG; a service set identifier SSID used by the user equipment UE; Geographic location information; or, the basic service set identifies the BSSID.
  • the present invention further provides a policy control system in a converged network, where the system includes a policy authorization execution unit, and a location information receiving unit and a policy interaction unit in the PCRF; wherein the policy authorization execution unit is applied to the BPCF, In the BNG or the fused policy control entity, the location information receiving unit is configured to: when the fixed network is used as the TWAN access evolved packet system, locate the policy authorization execution unit according to the location information sent by the TWAN; The policy interaction unit is configured to: establish a policy session with the policy authorization execution unit, and send the terminal identifier to the policy authorization execution unit; or perform policy signaling interaction with the policy authorization execution unit, and identify the terminal Sending to the policy authorization execution unit;
  • the policy authorization execution unit is configured to: locate the fixed network line corresponding to the policy session or policy signaling according to the received terminal identifier.
  • the policy authorization execution unit is further configured to: after locating the fixed network line corresponding to the policy session or the policy signaling, authorizing or executing a policy for the policy delivered by the policy interaction unit.
  • the system further includes a positioning information sending unit, and a positioning information forwarding unit in the P-GW, wherein the positioning information sending unit is applied to a BNG, or a GTP endpoint or MAG other than the BNG,
  • the positioning information sending unit is configured to: include the positioning information in a header information of a create session request message or a PBU message sent to the P-GW, or carry the inclusion in the create session request message or the PBU message a cell that locates the location information, and sends the location information to the PCRF;
  • the location information forwarding unit is configured to: parse the location information according to the received cell or message header containing the location information of the create session request message or the PBU message, and forward the location information to the PCRF;
  • the location information includes: an address or a domain name or an identifier of the BNG; an address or a domain name or an identifier of the GTP endpoint; an address or a domain name or an identifier of the MAG; a service set identifier SSID used by the user equipment UE; The geographical location information of the device UE; or, the basic service set identifies the BSSID.
  • FIG. 1 is a schematic diagram of a non-3GPP access to EPS architecture
  • 2 is a schematic diagram of a policy control architecture for accessing an EPC by an S2b/S2c;
  • Figure 3 is a schematic diagram of the second policy control architecture of the S2b/S2c accessing the EPC;
  • Figure 4 is a third schematic diagram of the policy control architecture for S2b/S2c access to EPC;
  • Figure 5 is a fourth schematic diagram of the policy control architecture for S2b/S2c access to the EPC;
  • Figure 6 is a schematic diagram of a policy control architecture for S2a access to an EPC
  • Figure 7 is a schematic diagram of the second policy control architecture of the S2a accessing the EPC
  • Figure 8 is a third schematic diagram of the policy control architecture for S2a access to the EPC
  • Figure 9 is a schematic diagram of four policy control architectures for S2a access to EPC;
  • FIG. 10 is a schematic diagram of a policy control flow of S2a accessing an EPC according to Embodiment 1 of the present invention
  • FIG. 11 is a schematic flowchart of a policy control of S2a accessing an EPC according to Embodiment 2 of the present invention
  • FIG. 12 is a schematic diagram of S2a access according to Embodiment 3 of the present invention
  • FIG. 13 is a schematic diagram of a policy control flow of S2a accessing an EPC according to Embodiment 4 of the present invention
  • FIG. 14 is a schematic flowchart of a policy control of S2a accessing an EPC according to Embodiment 5 of the present invention.
  • This embodiment provides a method for policy control, and uses the following scheme:
  • the PCRF locates the BPCF, the fixed network gateway (BNG), or the fused policy control entity (PCRF+) according to the positioning information sent by the P-GW, establishes a policy session with the BPCF, the BNG, or the PCRF+, and sends the terminal identifier to the BPCF. Said BNG or said PCRF+;
  • the BPCF, the BNG, or the PCRF+ is located according to the terminal identifier, and is located to a fixed network line corresponding to the policy session.
  • the PCRF locates the BNG according to the positioning information sent by the P-GW, performs policy signaling interaction with the BNG, and sends the terminal identifier to the BNG;
  • the BNG locates the fixed network line according to the terminal identifier.
  • the foregoing method for policy control provided by this embodiment specifically includes:
  • the P-GW receives the positioning information sent from the TWAN, and the P-GW locates the location through the Gx interface.
  • the information is sent to the PCRF.
  • the PCRF searches for the BPCF according to the location information.
  • the PCRF establishes a policy session with the BPCF on the S9a interface and sends the terminal identifier to the BPCF.
  • the BPCF or the BRAS locates the fixed network line corresponding to the policy session on the S9a interface according to the terminal identifier. And execute the policy delivered by the S9a interface or perform policy authorization on the policy of the S9a interface.
  • the P-GW receives the positioning information sent from the TWAN, and the P-GW sends the positioning information to the PCRF through the Gx interface.
  • the PCRF searches for the BRAS according to the positioning information, and the PCRF establishes a policy session with the BRAS on the Gxd interface and sends the terminal identifier.
  • the BRAS locates the fixed network line corresponding to the policy session on the Gxd interface according to the terminal identifier, and executes the policy delivered by the Gxd interface or the policy enforcement control of the Gxd interface.
  • the P-GW receives the positioning information sent from the TWAN, and the P-GW sends the positioning information to the PCRF through the Gx interface, and the PCRF searches for the PCRF+ according to the positioning information, and the PCRF and the PCRF+ establish a policy session on the IF-1 interface and set the terminal.
  • the identifier is sent to the PCRF+, and the PCRF+ locates the fixed network line corresponding to the policy session on the IF-1 interface according to the terminal identifier, and performs admission control on the policy of the IF-1 interface, and then sends the policy to the corresponding BRAS for executing the policy. .
  • the PCRF searches for the BRAS according to the positioning information, and the PCRF performs signaling interaction with the BRAS and sends the terminal identifier to the BRAS.
  • the BRAS locates the fixed network line according to the terminal identifier, and sends the policy on the Gxd interface to the PCRF+, and the PCRF+ performs admission control on the policy. After that, it is sent to the BRAS for execution.
  • the BPCF determines, according to the fixed line ID, or the tunnel information, or the local address information of the device, how many devices currently running on the current fixed line, and calculates how many idle resources are currently on the fixed line. According to the calculation result, it is judged whether the resources of the subsequent request authorization can be satisfied, and the final authorization decision is made, which is called policy authorization.
  • the authorization of the policy is also referred to as admission control of the service. For example, if the fixed line resources are sufficient, BPCF successfully authorizes the policy of a certain service, indicating that the service is allowed to be created, that is, the service is accepted. Conversely, if the fixed line resources are insufficient, PCRF+ rejects the policy of a certain service, indicating that the service is not accepted.
  • admission control For example, if the fixed line resources are sufficient, BPCF successfully authorizes the policy of a certain service, indicating that the service is allowed to be created, that is, the service is accepted. Conversely, if the fixed line resources are insufficient, PCRF+ rejects the policy of a certain service, indicating that the service is not accepted.
  • sending location information refers to:
  • a GTP endpoint ie, a GTP peer
  • the PMIP endpoint MAG (Mobile Access Gateway)
  • the BRAS integrates the GTP peer or the MAG to send the positioning information.
  • positioning information refers to any of the following information:
  • the address or domain name or logo of the BRAS is the address or domain name or logo of the BRAS.
  • the terminal identifier may be an IMSI (International Mobile Subscriber Identification Number) or a NAI (Network Access Identifier).
  • IMSI International Mobile Subscriber Identification Number
  • NAI Network Access Identifier
  • the P-GW receiving the positioning information from the TWAN means: the positioning information is sent by the TWAN to the P-GW through the GTP message or the PMIP message, or the P-GW parses the positioning information by using the GTP message or the PMIP message.
  • the terminal UE accesses the trusted TWAN, and the BRAS learns the correspondence between the terminal identifier and the fixed network line.
  • the BRAS saves the relationship, or the BRAS sends the correspondence between the terminal identifier and the fixed line to BPCF or PCRF+.
  • the following embodiments of the present invention are based on the scenario in which the fixed network accesses the EPC in a trusted non-3GPP access network.
  • the fixed network line is also referred to as a fixed network backhaul network or a fixed network link.
  • the positioning information includes the following ones:
  • the address or domain name or identity of the BRAS is the address or domain name or identity of the BRAS
  • SSID Service Set Identifier
  • BSSID basic service set Identifier, the basic service set identifier, that is, the MAC address of the device
  • the terminal identifier that is, IMSI or NAI, has been sequentially transferred from the P-GW to the policy network element such as PCRF, BPCF, or PCRF+.
  • the positioning information is used by the PCRF to find BPCF/BRAS/PCRF+.
  • the specific operation may be: configuring the relationship between the BPCF/PCRF+/BRAS and the positioning information in the 3GPP network or the BBF network for the PCRF query, so as to ensure that the PCRF finds the corresponding BPCF/PCRF+/BRAS according to the positioning information.
  • the PCRF may be based on the mapping relationship between the positioning information saved by itself and the BPCF/PCRF+/BRAS, or according to the positioning information and BPCF/PCRF+ configured on other network elements such as a Diameter Route Agent (DRA). /BRAS correspondence, find the BPCF/PCRF+/BRAS corresponding to the positioning information.
  • DDA Diameter Route Agent
  • BPCF/PCRF+ does not use location information by default when searching for BRAS.
  • the assumption based on the following is one of the following:
  • BPCF and BRAS, PCRF+ and BRAS exist - corresponding fixed relationship, so BPCF/PCRF+ can find the correct BRAS according to the fixed relationship;
  • BPCF/PCRF+ can use the positioning information to find the BRAS.
  • the correspondence between the positioning information and the BRAS is required to be configured in the 3GPP/BBF network, and the BPCF/PCRF+ can be queried according to the positioning information, thereby finding the correct BRAS.
  • TWAN sends
  • the bit information is sent to the P-GW, and the P-GW sends the positioning information to the PCRF through the Gx interface.
  • the PCRF searches for the BPCF according to the positioning information.
  • the PCRF establishes a policy session with the BPCF on the S9a interface and sends the terminal identifier to the BPCF.
  • the BPCF or the BRAS is based on the terminal. The locating the fixed network line corresponding to the policy session on the S9a interface, and executing the policy delivered by the S9a interface or performing the admission control on the S9a interface.
  • the process steps are described as follows:
  • Step 1001. The terminal UE accesses from the BBF network/TWAN.
  • Step 1002 The terminal UE completes access authentication and authorization.
  • the TWAN learns the relationship between the terminal identity (IMSI or NAI) and the fixed line.
  • the TWAN either saves the relationship, or sends the relationship to the BPCF through stateless session signaling, or establishes a local policy session with the BPCF (such as an R interface policy session) and sends the relationship to the BPCF.
  • the implementation steps in the dashed box A and the dashed box B in the following flow chart are two mutually exclusive options, that is, Execution A does not execute B, Execution B does not execute A, and one of A and B is executed.
  • the message steps of A and B are exactly the same, but the timing of the trigger is different.
  • the trigger condition of A is that the terminal UE access authentication authorization of step 1002 is successful; and the trigger condition of B is the three-layer attached trigger message sent in step 1009.
  • Step 1003. The BBF network/TWAN sends the PTP message of the GTP protocol "Create Session Request" or PMIPv6 protocol to the P-GW to request tunnel binding.
  • the message carries the location information.
  • the positioning information includes the following:
  • the address or domain name or identity of the BRAS is the address or domain name or identity of the BRAS
  • the specific execution network element for sending messages in the BBF network/TWAN may be a new network element/module with a GTP peer or MAG function located on the TWAN network; or an enhanced BTP of the GTP peer or MAG function.
  • the corresponding message is the "Create Session Request" message, and the BBF network/TWAN role is the GTP peer; when the S2a interface uses the PMIPv6 protocol, the corresponding message is the PBU message, the BBF network.
  • the role of /TWAN is MAG. Step 1004.
  • the P-GW initiates a Gx session establishment and sends the location information to the PCRF.
  • the P-GW sends the location information to the hPCRF through the vPCRF of the visited place.
  • Step 1005. The PCRF searches for BPCF by using the positioning information, and establishes a policy session with the BPCF on the S9a interface and sends the terminal identifier to the BPCF.
  • Step 1006 Upon triggering of step 1005, BPCF interacts with the BRAS execution policy of the BBF network.
  • the BBF network may have established a local policy session with the BPCF (for example, a policy session on the R interface), and the BPCF learns the relationship between the terminal identifier and the fixed line from the BRAS, and the BPCF is based on the terminal.
  • the relationship between the association and the uplink policy session of the S9a interface (refer to the description of 1005), the relationship between the terminal identifier and the fixed line is associated with the local policy session and the policy session on the S9a interface, that is, the policy session on the S9a interface is established.
  • the subsequent BPCF or other proxy network element such as the BRAS performs the policy delivered by the S9a interface or the policy execution admission control of the S9a interface.
  • the BBF network does not establish a local policy session with BPCF.
  • the BPCF actively initiates the interaction with the BRAS signaling.
  • the BPCF learns the correspondence between the terminal identifier and the fixed network line from the BRAS, and establishes the correspondence between the fixed network line and the policy session on the S9a interface according to the terminal identifier, and the subsequent BPCF.
  • other proxy network elements such as the BRAS perform the policy delivered by the S9a interface or perform the admission control on the S9a interface.
  • Step 1007 The P-GW responds to the "Create Session Reply" of the GTP protocol or the PB A message of the PMIPv6 protocol to the BBF network /TWAN, and the tunnel binding is completed. This step can occur after step 1004.
  • Step 1008. The authentication step is completed.
  • Step 1009 The terminal sends a Layer 3 attach trigger message to the TWAN, such as a DHCP request message.
  • Step 1010 As Option B, the specific operation is the same as A, and participate in the description of step 1003-1007.
  • Step 1011 Three layers of attachment completion messages.
  • the Gxa interface between the TWAG and the PCRF can also be used.
  • the interface is developed to directly transmit the positioning information. That is, the TWAG sends a gateway control session establishment request message on the interface to the PCRF through the Gxa interface. After the PCRF receives the positioning message, the subsequent operations are the same as above.
  • Embodiment 2
  • the P-GW receives the positioning information sent from the T WAN, and the P-GW sends the positioning information to the PCRF through the Gx interface.
  • the PCRF searches for the BRAS according to the positioning information, and the PCRF establishes a policy session with the BRAS on the Gxd interface and sends the terminal identifier to the terminal.
  • the BRAS, the BRAS locates the fixed network line corresponding to the policy session on the Gxd interface according to the terminal identifier, and performs the policy delivered by the Gxd interface or the admission control of the policy of the Gxd interface.
  • the process steps are described as follows:
  • the TWAN learns the relationship between the terminal identity (IMSI or NAI) and the fixed line, and the TWAN saves the relationship.
  • Step 1105. The PCRF searches for the BRAS through the location information, establishes a policy session with the BRAS on the Gxd interface, and sends the terminal identifier to the BRAS.
  • the BRAS establishes a policy session and a fixed line on the Gxd interface according to the relationship between the terminal identifier and the policy session of the Gxd interface (see description of 1105), the relationship between the terminal identifier and the fixed line (see the description of steps 1101-1104). Relationship, and execute the policy issued by the Gxd interface or the policy execution admission control of the Gxd interface.
  • the P-GW receives the positioning information sent from the TWAN, and the P-GW sends the positioning information to the PCRF through the Gx interface.
  • the PCRF searches for the PCRF+ according to the positioning information, and the PCRF and the PCRF+ establish a policy session on the IF-1 interface and send the terminal identifier.
  • the PCRF+, PCRF+ locates the fixed network line corresponding to the policy session on the IF-1 interface according to the terminal identifier, and performs admission control on the policy of the IF-1 interface, or sends the policy to the pair.
  • the BRAS should be used to enforce the policy. The process steps are described as follows:
  • the TWAN learns the relationship between the terminal identity (IMSI or NAI) and the fixed line.
  • the TWAN either saves the relationship, or sends the relationship to PCRF+ via stateless session signaling, or establishes a local policy session with the PCRF+ (such as an IF-2 interface policy session) and sends the relationship to PCRF+.
  • Step 1205. The PCRF searches for PCRF+ through the positioning information, establishes a policy session with the PCRF+ interface on the IF-1 interface, and sends the terminal identifier to the PCRF+.
  • Step 1206 Upon triggering of step 1205, PCRF+ interacts with the BRAS execution policy of the BBF network.
  • the BBF network may have established a local policy session with the PCRF+ (for example, a policy session on the IF-2 interface), and the PCRF+ learns the relationship between the terminal identifier and the fixed line from the BRAS, PCRF+ Associate the local policy session with the policy session on the IF-1 interface according to the association between the terminal identifier and the policy session of the IF-1 interface (see description of 1205), the relationship between the terminal identifier and the fixed line, that is, the IF is established. The corresponding relationship between the policy session and the fixed network line on the -1 interface, and subsequent policy enforcement control on the IF-1 interface, or the policy is sent to the corresponding BRAS for executing the policy.
  • the PCRF+ learns the relationship between the terminal identifier and the fixed line from the BRAS
  • PCRF+ Associate the local policy session with the policy session on the IF-1 interface according to the association between the terminal identifier and the policy session of the IF-1 interface (see description of 1205), the relationship between the terminal identifier and
  • the BBF network does not have a local policy session with BPCF.
  • PCRF+ actively initiates interaction with the BRAS signaling.
  • the PCRF+ learns the correspondence between the terminal identifier and the fixed network line from the BRAS, so that the terminal identifier establishes the correspondence between the fixed network line and the policy session on the IF-1 interface.
  • the policy is sent to the corresponding BRAS for executing the policy.
  • This embodiment corresponds to the architecture of FIG. 9 and the flow of FIG.
  • the PCRF searches for the BRAS according to the location information, and the PCRF performs policy signaling interaction with the BRAS and sends the terminal identifier to the BRAS.
  • the BRAS locates the fixed network line of the policy interaction service on the Gxd interface according to the terminal identifier, and the Gxd interface
  • the above policy is sent to PCRF+, and PCRF+ performs admission control on the policy.
  • the process steps are described as follows: Step 1301 - Step 1304. Same as Step 1001 - Step 1004.
  • the TWAN learns the correspondence between the terminal identity (IMSI or NAI) and the fixed line, and the TWAN may establish a local policy session with the PCRF+.
  • Step 1305. The PCRF searches for the BRAS through the location information, and the PCRF interacts with the BRAS for policy signaling and sends the terminal identifier to the BRAS.
  • the BRAS locates the fixed line of the policy interaction service on the Gxd interface according to the terminal identifier.
  • Step 1306 Upon triggering of step 1305, the BRAS interacts with the PCRF+ execution policy. The BRAS sends the policy on the IF-1 interface to PCRF+, which performs admission control on the policy.
  • the BRAS may have established a policy session with the PCRF+ on the IF-2 interface, and the step is only used to update the policy session; or until this step, the BRAS actively initiates a policy session establishment with the PCRF+.
  • the specific process of this embodiment is as shown in FIG. 14 , and may be the same as the process in the foregoing FIG. 10-13 .
  • the difference is only that the manner in which the TWAN sends the location information to the P-GW in step 1401 is different.
  • the method is sent to The P-GW does not carry the "location information" in a separate cell in the Create Session Request/PBU message, but includes the location information in the header information in the Create Session Request/PBU message.
  • the P-GW obtains the location information by parsing the header information of the "Create Session Request/PBU Message".
  • the embodiment of the present invention further provides a policy control system in a converged network, where the system includes a policy authorization execution unit, and a location information receiving unit and a policy interaction unit in the PCRF; wherein the policy authorization execution unit application In BPCF, BNG, or a converged policy control entity,
  • the positioning information receiving unit is configured to: when the fixed network is used as a TWAN access evolved packet system, Locating to the policy authorization execution unit according to the location information sent by the TWAN;
  • the policy interaction unit is configured to: establish a policy session with the policy authorization execution unit, and send the terminal identifier to the policy authorization execution unit; or perform policy signaling interaction with the policy authorization execution unit, and identify the terminal Sending to the policy authorization execution unit;
  • the policy authorization execution unit is configured to locate, according to the received terminal identifier, a fixed network line corresponding to the policy session or policy signaling.
  • the policy authorization execution unit is further configured to: after locating the fixed network line corresponding to the policy session or the policy signaling, authorizing, or executing, a policy delivered by the policy interaction unit.
  • system further includes a positioning information sending unit, and a positioning information forwarding unit in the P-GW, wherein the positioning information sending unit is applied to a BNG, or a GTP endpoint or MAG other than the BNG,
  • the location information sending unit is configured to include the location information in a header information of a create session request message or a PBU message sent to the P-GW, or by carrying the inclusion in the create session request message or the PBU message. a cell that locates the location information, and sends the location information to the PCRF;
  • the locating information forwarding unit is configured to parse the positioning information according to the received cell or message header containing the positioning information of the PSC message and forwarded to the PCRF;
  • the location information includes: an address or a domain name or an identifier of the BNG;
  • modules or steps of the present invention described above can be implemented with a general purpose computing device, which can be centralized on a single computing device, or distributed. Alternatively, on a network of computing devices, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, The steps shown or described may be performed in an order different than that herein, or they may be separately fabricated into individual integrated circuit modules, or a plurality of the modules or steps may be implemented as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

Abstract

一种融合网络中的策略控制方法,固网作为信任的无线局域网接入网(TWAN)接入演进的分组系统时,策略与计费规则功能实体(PCRF)根据分组数据网络网关(P-GW)或信任的 WLAN接入网关(TWAG)发送的定位信息定位到宽带论坛策略控制功能实体(BPCF)、固网网关(BNG)或者融合的策略控制实体,与所述BPCF、所述BNG或者所述融合的策略控制实体建立策略会话,并将终端标识发送给所述BPCF、所述BNG或者所述融合的策略控制实体;所述BPCF、所述BNG或者所述融合的策略控制实体根据所述终端标识,定位到所述策略会话对应的固网线路。

Description

一种融合网络中的策略控制方法及系统
技术领域
本发明涉及通信技术领域, 尤其涉及一种融合网络中的策略控制方法及 系统。 背景技术
第三代合作伙伴计划( 3rd Generation Partnership Project, 简称 3GPP )演 进的分组系统(Evolved Packet System, 简称 EPS ) , 如图 1所示的非漫游场 景的 EPS网络架构图, 由演进的通用移动通信系统陆地无线接入网(Evolved Universal Terrestrial Radio Access Network, 简称 E-UTRAN )、 移动管理单元 ( Mobility Management Entity, 简称 MME ) 、 服务网关 ( Serving Gateway, 简称 S-GW )、分组数据网络网关( Packet Data Network Gateway, 简称 P-GW 或者 PDN GW ) 、 归属用户服务器(Home Subscriber Server, 简称 HSS ) 、 策略与计费规则功能( Policy and Charging Rules Function , 简称 PCRF )实体 及其他支撑节点组成。 PCRF是 PCC ( Policy and Charging Control, 策略与计 费控制) 的核心, 负责策略决策和计费规则的制定。 PCRF提供了基于业务 数据流的网络控制规则,这些网络控制包括业务数据流的检测、 门控(Gating Control ) , 服务质量( Quality of Service , 简称 QoS )控制以及基于数据流的 计费规则等。 PCRF 将其制定的策略和计费规则发送给 PCEF ( Policy and Charging Enforcement Function,策略与计费规则执行功能)实体执行, 同时, PCRF还需要保证这些规则和用户的签约信息一致。 PCRF制定策略和计费规 则的依据包括: 从 AF ( Application Function, 业务应用功能)获取与业务相 关的信息; 从用户签约数据库 (Subscription Profile Repository, 简称 SPR ) 获取与用户策略计费控制签约信息;从 PCEF获取与承载相关网络的信息等。
EPS支持与非 3GPP系统的互通。 如图 1所示, 与非 3GPP系统的互通 通过 S2a/b/c接口实现, P-GW作为 3GPP与非 3GPP系统间的锚点。 其中非 3GPP系统被分为可信任非 3GPP IP接入和不可信任非 3GPP IP接入。 可信 任非 3GPP IP接入可直接通过 S2a接口与 P-GW连接, 该接口釆用 PMIPv6 ( Proxy Mobile IP version 6 ,代理移动 IP版本 6 )协议或者 GTP( General Packet Radio Service tunnel Protocol, 通用分组无线服务隧道协议)协议; 不可信任 非 3GPP IP接入需经过 ePDG ( Evolved Packet Data Gateway, 演进的分组数 据网关)与 P-GW相连, ePDG与 P-GW间的接口为 S2b, 釆用 PMIPv6或者 GTP协议, 并且 UE ( User Equipment, 用户设备)和 ePDG之间釆用 IPSec
( Internet Protocol Security, Internet协议安全性)对信令和数据进行加密保 护。 S2c提供了 UE与 P-GW之间的用户面相关的控制和移动性支持, 其支 持的移动性管理协议为 DSMIPv6 ( Mobile IPv6 Support for Dual Stack Hosts and Routers, 支持双栈的移动 IPv6 ) 。
当前课题 FMC ( Fixed Mobile Convergence , 固网移动融合), 主要研究
BBF ( Broadband Forum, 宽带论坛)接入网作为 "非 3GPP接入网" 时的移 动性管理技术和策略管理技术。 所述 BBF接入网又称作固网,特指无线局域 网 (WLAN )接入。 当前的策略管理技术只研究了 S2b和 S2c接入场景, 当 前主要有四种架构, 下面对这四种架构和对应的策略管理基本操作做简单介 绍。
一、 架构一(对应图 2 )
因为对于 S2b和 S2c场景下, UE和 ePDG, 或者 UE和 P-GW之间建立 了 IPsec隧道,因此 IPsec隧道的外层头信息,可以作为 PCRF定位 BPCF( BBF Policy Control Function, 宽带论坛策略控制功能) , 以及 BPCF定位固网线 路的标识。
在 IPsec隧道建立成功后, ePDG或者 P-GW就可以获取 IPsec隧道的头 信息, 之后把该信息通过以下路径发送给 PCRF, 进一步发送给 BPCF:
ePDG->P-GW->PCRF->BPCF(GTP/PMIP-based S2b场景);
ePDG->PCRF->BPCF(PMIP-based S2b或者不信任的 S2c场景);
P-GW->PCRF->BPCF (可信任的 S2c场景) 。
其中, 以上在两网元之间传递 IPsec隧道信息是借助于对应图中接口上 的消息传送的, 例如, ePDG和 P-GW之间是通过 S2b接口上的 GTP协议的 创建会话请求消息或者 PMIP协议的代理绑定请求消息; ePDG和 PCRF之间 是通过 Gxb*接口上的创建网关控制会话消息; P-GW和 PCRF之间是通过 Gx接口上的创建 /修改 IP-CAN会话消息; PCRF和 BPCF之间是通过 S9a接 口上的创建网关控制会话消息。
二、 架构二(对应图 3 )
IPsec隧道的外层头信息,作为 PCRF定位固网网关 BNG ( BBF Network
Gateway宽带论坛网关 ) /BRAS ( BBF Remote Access Server, 宽带论坛接入 服务器) , 以及 BNG/BRAS定位固网线路的标识。 其中, BNG和 BRAS指 的是同一个网元, 有时也称 BNG, 或者 BRAS。
在 IPsec隧道建立成功后, ePDG或者 P-GW就可以获取 IPsec隧道的头 信息, 之后把该信息通过以下路径发送给 PCRF, 进一步发送给 BRAS: ePDG->P-GW->PCRF->BRAS (GTP/PMIP-based S2b场景);
ePDG->PCRF->BRAS (PMIP-based S2b或者不信任的 S2c场景);
P-GW->PCRF->BRAS (可信任的 S2c场景) 。
其中, ePDG , PCRF , P-GW之间的消息同架构一中的说明, PCRF 和 BRAS之间是通过 Gxd接口上创建网关控制会话消息传递 IPsec隧道信息的。
三、 架构三(对应图 4 )
IPsec隧道的外层头信息,作为 PCRF定位融合的策略控制实体(本文中 称作 PCRF+ ) 以及 PCRF+定位固网线路的标识。
其中, PCRF+是一个专用于管理固网资源的策略控制实体; 位于 PCRF 和 PCRF+之间 , 以及 PCRF+和 BBF网络网关 BRAS之间的接口, 为简便起 见, 本文中也用 IF-1 ( interface 1 )和 IF-2 ( interface 2 )来简称, 以便区分于 现有的接口。
在 IPsec隧道建立成功后, ePDG或者 P-GW就可以获取 IPsec隧道的头 信息, 之后把该信息通过以下路径发送给 PCRF, 进一步发送给 PCRF+: ePDG->P-GW->PCRF->PCRF+ (GTP/PMIP-based S2b场景);
ePDG->PCRF->PCRF+ (PMIP-based S2b或者不信任的 S2c场景);
P-GW->PCRF->PCRF+ (可信任的 S2c场景) 。 其中 , ePDG , PCRF , P-GW之间的消息同架构一中的说明 , PCRF 和 PCRF+之间是通过 IF-1接口上的会话消息传递 IPsec隧道信息的。
四、 架构四 (对应图 5 )
IPsec隧道的外层头信息, 作为 PCRF定位 BRAS、 BRAS定位 PCRF+ 以及 PCRF+定位固网线路的标识。
在 IPsec隧道建立成功后, ePDG或者 P-GW就可以获取 IPsec隧道的头 信息, 之后把该信息通过以下路径发送给 PCRF, 进一步发送给 BRAS 和 PCRF+:
ePDG->P-GW->PCRF->BRAS->PCRF+ (GTP/PMIP-based S2b场景); ePDG->PCRF->BRAS->PCRF+ (PMIP-based S2b或者不信任的 S2c场景);
P-GW->PCRF->BRAS->PCRF+ (可信任的 S2c场景) 。
其中, ePDG , PCRF , P-GW之间的消息同架构一中的说明, PCRF 和 BRAS之间的消息同架构二中的说明, BRAS和 PCRF+之间是通过 IF-2接口 上的会话消息传递 IPsec隧道信息的。
目前, BBF网络作为可信任的非 3GPP接入 EPC时,就所述的 S2a接入,
BBF网络又称为: TWAN ( trusted WLAN Access Network, 信任的 WLAN接 入网) , BBF网络的 S2a接入的移动性技术研究已经完成, 但是相关的策略 控制机制还没有确定。 其中, TWAN是个接入网, 包括多个集成或者分立的 网元, 比如: TWAG ( trusted WLAN Access Gateway, 信任的 WLAN接入网 关), 现有的 BRAS网关, BPCF等。 参照图 2-5中的架构模式, S2a接入可 以考虑重用 S2b/S2c的策略控制架构, 如图 6-9所示。 但是, 相关技术存在 的问题是: S2b/S2c接入时, UE和 ePDG和 P-GW之间有 IPsec隧道, 对应 的 IPsec隧道信息可以用于定位固网线路,当 S2a接入时,无 IPsec隧道信息, 因此如何定位固网网关或者相应的策略控制实体, 如 BRAS、 BPCF 或者 PCRF+, 以及如何定位固网线路, 从而如何执行策略授权执行, 是当前需要 解决的问题。 发明内容 本发明解决的技术问题是提供一种融合网络中的策略控制方法及系统, 解决了 BBF接入网作为可信任的非 3GPP接入网接入 EPC时的定位固网线 路以及策略控制问题。
为解决上述技术问题, 本发明提供了一种融合网络中的策略控制方法, 固网作为信任的无线局域网接入网(TWAN)接入演进的分组系统时,
策略与计费规则功能实体 (PCRF)根据分组数据网络网关 (P-GW) 或信任 的 WLAN接入网关( TWAG )发送的定位信息定位到宽带论坛策略控制功能 实体 (BPCF)、 固网网关 (BNG)或者融合的策略控制实体, 与所述 BPCF、 所 述 BNG或者所述融合的策略控制实体建立策略会话, 并将终端标识发送给 所述 BPCF、 所述 BNG或者所述融合的策略控制实体;
所述 BPCF、所述 BNG或者所述融合的策略控制实体根据所述终端标识, 定位到所述策略会话对应的固网线路。
优选地, 所述方法还包括:
定位到所述策略会话对应的固网线路后, 所述 BPCF、 所述 BNG或者所 述融合的策略控制实体对所述 PCRF下发的策略进行授权, 或者执行策略。
优选地, 所述定位信息由所述 BNG发送, 或者由所述 BNG以外的通用 分组无线服务隧道协议 (GTP)端点或者移动接入网关(MAG)发送给所 述 P-GW, 由所述 P-GW发送给所述 PCRF; 或者所述定位信息由所述 TWAG 发送给所述 PCRF。
优选地, 所述定位信息包括:
所述 BNG的地址或者域名或者标识;
所述 GTP端点的地址或者域名或者标识; 或者,
所述 MAG的地址或者域名或者标识。
优选地, 所述方法还包括:
所述 PCRF 4艮据所述定位信息定位到所述 BPCF, 与所述 BPCF建立策 略会话并将所述终端标识发送给所述 BPCF;
所述 BPCF根据所述终端标识, 以及从所述 BNG获知的所述终端接入 时建立的终端标识与固网线路的对应关系 , 定位到所述策略会话对应的固网 执行策略。
优选地, 所述方法还包括:
所述 PCRF根据所述定位信息定位到所述 BNG, 与所述 BNG建立策略 会话并将所述终端标识发送给所述 BNG;
所述 BNG根据所述终端标识, 以及所述终端接入时建立的终端标识与 固网线路的对应关系, 定位到所述策略会话对应的固网线路后, 所述 BNG 对所述 PCRF下发的策略进行授权, 或者执行策略。
优选地, 所述方法还包括:
所述 PCRF根据所述定位信息定位到所述融合的策略控制实体, 与所述 融合的策略控制实体建立策略会话并将所述终端标识发送给所述融合的策略 控制实体;
所述融合的策略控制实体根据所述终端标识, 以及从所述 BNG获知的 所述终端接入时建立的终端标识与固网线路的对应关系, 定位到所述策略会 话对应的固网线路后, 所述融合的策略控制实体对所述 PCRF下发的策略进 行授权, 或者执行策略。
优选地, 所述 BPCF或者所述融合的策略控制实体通过以下方式从所述 BNG获知所述终端接入时建立的终端标识与固网线路的对应关系:
所述 BNG在所述终端接入时获知所述终端标识与固网线路的对应关系 后, 通过与所述 BPCF或者所述融合的策略控制实体建立本地策略会话或者 通过无状态会话信令, 将所述终端标识与固网线路的对应关系发送给所述 BPCF或者所述融合的策略控制实体;
或者, 所述 BPCF或者所述融合的策略控制实体从所述 PCRF接收到所 述终端标识后, 向所述 BNG获取所述终端标识与固网线路的对应关系。
优选地, 所述 BNG、 GTP端点或者 MAG通过以下方式向所述 P-GW发 送所述定位信息:
向所述 P-GW发送创建会话请求消息或者 PBU消息,在所述创建会话请 求消息或者 PBU消息中携带包含所述定位信息的信元;
或者,在发送给所述 P-GW的创建会话请求消息或者 PBU消息的头信息 中包含所述定位信息, 所述 P-GW解析出所述定位信息。
优选地, 所述定位信息包括:
用户设备 UE使用的服务集标识 SSID;
用户设备 UE所在的地理位置信息; 或者,
基本服务集标识 BSSID。
本发明还提供了一种融合网络中的策略控制方法,固网作为 TWAN接入 演进的分组系统时,
PCRF根据接收的 P-GW或者 TWAG发送的定位信息定位到固网网关
(BNG), 与所述 BNG进行策略信令交互, 并将终端标识发送给所述 BNG;
所述 BNG根据所述终端标识定位固网线路。
优选地, 所述方法还包括:
所述 BNG将所述 PCRF下发的策略发送给所述融合的策略控制实体, 所述融合的策略控制实体对所述 PCRF下发的策略进行授权后, 发送给所述 BNG执行。
优选地, 所述定位信息由所述 BNG发送, 或者由 GTP端点或者 MAG 发送给所述 P-GW; 或者所述定位信息由所述 TWAG发送给所述 PCRF;
所述定位信息包括: 所述 BNG的地址或者域名或者标识; 所述 GTP端 点的地址或者域名或者标识; 所述 MAG的地址或者域名或者标识; 用户设 备 UE使用的服务集标识 SSID; 用户设备 UE所在的地理位置信息; 或者, 基本服务集标识 BSSID。
此外, 本发明还提供了一种融合网络中的策略控制系统, 所述系统包括 策略授权执行单元, 以及 PCRF中的定位信息接收单元和策略交互单元; 其 中所述策略授权执行单元应用于 BPCF、 BNG或者融合的策略控制实体中, 所述定位信息接收单元设置为:固网作为 TWAN接入演进的分组系统时, 根据 TWAN发送的定位信息定位到所述策略授权执行单元; 所述策略交互单元设置为: 与所述策略授权执行单元建立策略会话, 将 终端标识发送给所述策略授权执行单元; 或者, 与所述策略授权执行单元进 行策略信令交互, 并将终端标识发送给所述策略授权执行单元;
所述策略授权执行单元设置为: 根据接收到的所述终端标识, 定位到所 述策略会话或策略信令对应的固网线路。
优选地, 所述策略授权执行单元还设置为: 定位到所述策略会话或者策 略信令对应的固网线路后, 对所述策略交互单元下发的策略进行授权、 或者 执行策略。
优选地, 所述系统还包括定位信息发送单元, 以及 P-GW中的定位信息 转发单元, 其中所述定位信息发送单元应用于 BNG、 或者 BNG以外的 GTP 端点或者 MAG,
所述定位信息发送单元设置为: 通过在发送给 P-GW的创建会话请求消 息或者 PBU消息的头信息中包含所述定位信息,或者通过在所述创建会话请 求消息或者 PBU消息中携带包含所述定位信息的信元,将所述定位信息发送 给所述 PCRF;
所述定位信息转发单元设置为: 根据接收到的所述创建会话请求消息或 者 PBU消息的包含所述定位信息的信元或者消息头解析出所述定位信息,并 转发给 PCRF;
其中, 所述定位信息包括: 所述 BNG的地址或者域名或者标识; 所述 GTP端点的地址或者域名或者标识; 所述 MAG的地址或者域名或者标识; 用户设备 UE使用的服务集标识 SSID; 用户设备 UE所在的地理位置信息; 或者, 基本服务集标识 BSSID。 附图概述
此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中:
图 1为非 3GPP接入到 EPS的架构示意图; 图 2为 S2b/S2c接入 EPC的策略控制架构一示意图;
图 3为 S2b/S2c接入 EPC的策略控制架构二示意图;
图 4为 S2b/S2c接入 EPC的策略控制架构三示意图;
图 5为 S2b/S2c接入 EPC的策略控制架构四示意图;
图 6为 S2a接入 EPC的策略控制架构一示意图;
图 7为 S2a接入 EPC的策略控制架构二示意图;
图 8为 S2a接入 EPC的策略控制架构三示意图;
图 9为 S2a接入 EPC的策略控制架构四示意图;
图 10为本发明实施例一的 S2a接入 EPC的策略控制流程示意图; 图 11为本发明实施例二的 S2a接入 EPC的策略控制流程示意图; 图 12为本发明实施例三的 S2a接入 EPC的策略控制流程示意图; 图 13为本发明实施例四的 S2a接入 EPC的策略控制流程示意图; 图 14为本发明实施例五的 S2a接入 EPC的策略控制流程示意图。 本发明的较佳实施方式
本实施方式提供一种策略控制的方法, 釆用如下方案:
PCRF根据 P-GW发送的定位信息定位到 BPCF、 固网网关 (BNG)或者融 合的策略控制实体(PCRF+ ) , 与 BPCF、 BNG或者 PCRF+建立策略会话, 并将终端标识发送给所述 BPCF、 所述 BNG或者所述 PCRF+;
所述 BPCF、 所述 BNG或者所述 PCRF+根据所述终端标识, 定位到所 述策略会话对应的固网线路。
或者, PCRF根据 P-GW发送的定位信息定位到 BNG, 与所述 BNG进 行策略信令交互, 并将终端标识发送给所述 BNG;
所述 BNG根据所述终端标识定位固网线路。
更进一步地, 本实施方式提供的上述策略控制的方法, 具体包括:
P-GW接收到从 TWAN发送来的定位信息, P-GW通过 Gx接口把定位 信息发送给 PCRF, PCRF根据定位信息查找 BPCF, PCRF与 BPCF建立 S9a接口上的策略会话并把终端标识发送给 BPCF, BPCF或者 BRAS根据终 端标识定位该 S9a接口上的策略会话所对应的固网线路, 并执行 S9a接口下 发的策略或者对 S9a接口的策略执行策略授权。
或者: P-GW接收到从 TWAN发送来的定位信息, P-GW通过 Gx接口 把定位信息发送给 PCRF, PCRF根据定位信息查找 BRAS, PCRF与 BRAS 建立 Gxd接口上的策略会话并把终端标识发送给 BRAS, BRAS根据终端标 识定位该 Gxd接口上的策略会话所对应的固网线路,并执行 Gxd接口下发的 策略或者对 Gxd接口的策略执行接纳控制。
或者: P-GW接收到从 TWAN发送来的定位信息, P-GW通过 Gx接口 把定位信息发送给 PCRF , PCRF根据定位信息查找 PCRF+ , PCRF与 PCRF+ 建立 IF-1接口上的策略会话并把终端标识发送给 PCRF+, PCRF+根据终端标 识定位该 IF-1接口上的策略会话所对应的固网线路,并对 IF-1接口的策略执 行接纳控制, 然后将策略发送到对应的 BRAS用于执行策略。
或者: PCRF根据定位信息查找 BRAS, PCRF与 BRAS进行信令交互并 把终端标识发送给 BRAS, BRAS根据终端标识定位固网线路, 并把 Gxd接 口上的策略发送给 PCRF+, PCRF+对策略执行接纳控制之后, 发送给 BRAS 执行。
具体地, BPCF根据固网线路 ID, 或者隧道信息, 或者是设备的本地地 址信息确定当前共有多少设备的业务运行在当前的固网线路上, 并计算当前 固网线路上还有多少空闲资源, 根据计算结果判断是否能够满足后续请求授 权的资源, 做最后授权决策, 称作策略授权。
所述的对策略授权, 也称为对业务进行接纳控制。 举例来说, 如果固网 线路资源足够, BPCF对某个业务的策略进行了成功授权, 则表示允许该业 务创建, 也就是接纳了该业务。 反之, 如果固网线路资源不足, PCRF+对某 个业务的策略执行了拒绝, 则表示没有接纳该业务。 后文提到的策略授权和 接纳控制均是这个含义。
进一步的, 所述的发送定位信息是指:
独立于 BRAS外的 GTP端点 (即 GTP peer )发送定位信息, 或者独立 于 BRAS外的 PMIP端点 MAG ( Mobile Access Gateway, 移动接入网关)发 送定位信息, 或者 BRAS集成了 GTP peer或者 MAG发送定位信息。
进一步的, 定位信息是指以下信息中的任意一种:
GTP peer的地址或者域名或者标识;
MAG的地址或者域名或者标识;
BRAS的地址或者域名或者标识。
进一步的, 所述的终端标识可以是 IMSI ( International Mobile Subscriber Identification Number, 国际移动用户识别码) 或者 NAI ( Network Access Identifier, 网络接入标识) 。
进一步的, 所述的 P-GW接收来自 TWAN的定位信息是指: 定位信息 通过 GTP消息或者 PMIP消息由 TWAN发送给 P-GW, 或者 P-GW通过 GTP消息或者 PMIP消息解析出定位信息。
进一步的, 在 PCRF收到定位信息之前, 终端 UE接入信任的 TWAN, BRAS 获知终端标识和固网线路的对应关系。 BRAS 保存所述关系, 或者 BRAS把终端标识和固网线路的对应关系发送给 BPCF或者 PCRF+。
下文中将结合附图对本发明的实施例进行详细说明。 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。
本发明的下述实施例所基于的场景是: 固网以可信任非 3GPP接入网身 份接入 EPC的场景。
其中, 所述的固网线路又称固网回程网或者固网链路。
所述的定位信息包括以下一种:
GTP peer的地址或者域名或者标识;
MAG的地址或者域名或者标识;
BRAS的地址或者域名或者标识;
UE使用的 SSID(Service Set Identifier,服务集标识)
UE所在的地理位置信息(比如经纬度等) BSSID ( basic Service Set Identifier,基本服务集标识, 即 ΑΡ的 MAC地 址)
以下将针对各种不同的架构, 结合具体流程来说明本发明的发明点, 包 括: 定位信息是如何获取、 传递和使用的; 会话与固网线路是如何关联的; 策略是如何控制和执行的。
下述实施例中, 终端标识, 即 IMSI或者 NAI, 在现有技术中已经支持 从 P-GW依次传递给 PCRF、 BPCF或者 PCRF+等策略网元。
其中, 定位信息用于 PCRF查找 BPCF/BRAS/PCRF+。 具体的操作可以 是:在 3GPP网络或者 BBF网络配置 BPCF/PCRF+/BRAS与定位信息的关系, 用于 PCRF 查询, 从而可以保证 PCRF 根据该定位信息找到对应的 BPCF/PCRF+/BRAS。 具体地, PCRF 可以根据自身保存的定位信息与 BPCF/PCRF+/BRAS 的对应关系, 或者, 根据域内配置在其他网元比如 Diameter路由代理 (Diameter Route Agent, 简称 DRA ) 上的定位信息与 BPCF/PCRF+/BRAS的对应关系,找到该定位信息对应的 BPCF/PCRF+/BRAS。
另外, 下述实施例中, BPCF/PCRF+在查找 BRAS时默认没有利用定位 信息, 基于的假设有以下二选一:
1 ) BPCF与 BRAS, PCRF+与 BRAS存在——对应的固定关系, 这样 BPCF/PCRF+根据固定关系就一定能找到正确的 BRAS;
2 ) BPCF和 BRAS之间, PCRF+与 BRAS之间, 在 BPCF/PCRF+查找 BRAS之前, 已经建立了与终端标识相关本地策略会话, 并且终端标识已经 携带给了 BPCF/PCRF+, 因此 BPCF/BPCF+根据终端标识就能关联到正确的 本次策略会话上, 从而找到正确的 BRAS。
如果网络对以上二支设都不支持, 则 BPCF/PCRF+可以用定位信息查找 BRAS。 此时要求定位信息和 BRAS 的对应关系配置在 3GPP/BBF 网络, BPCF/PCRF+根据定位信息可以查询, 从而找到正确的 BRAS。
实施例一
本实施例对应的是图 6架构和图 10的流程。 该架构下, TWAN发送定 位信息给 P-GW, P-GW通过 Gx接口把定位信息发送给 PCRF, PCRF根据 定位信息查找 BPCF, PCRF与 BPCF建立 S9a接口上的策略会话并把终端 标识发送给 BPCF, BPCF或者 BRAS根据终端标识定位该 S9a接口上的策略 会话所对应的固网线路, 并执行 S9a接口下发的策略或者对 S9a接口的策略 执行接纳控制。 流程步骤描述如下:
步骤 1001. 终端 UE从 BBF网络 /TWAN接入。
步骤 1002. 终端 UE完成接入认证和授权。
通过步骤 1001和步骤 1002, TWAN(由 BRAS或者其他代理网元执行 ) 获知终端标识(IMSI或者 NAI )和固网线路的关系。 TWAN或者保存此关 系, 或者通过无状态会话信令把该关系发送给 BPCF, 或者建立与 BPCF的 本地策略会话(比如 R接口策略会话 ) , 并把该关系发送给 BPCF。
以下流程图中虚线框 A和虚线框 B中的实施步骤是两种互斥的可选项 , 也即, 执行 A就不执行 B, 执行 B就不执行 A, A和 B中有一种被执行。 A 和 B的消息步骤等完全相同, 只是触发时机不同。 A的触发条件是 1002步 的终端 UE接入认证授权成功;而 B的触发条件则是步骤 1009发送的三层附 着触发消息。
步骤 1003. BBF 网络 /TWAN发送 GTP协议的 "创建会话请求" 或者 PMIPv6协议的 PBU消息给 P-GW, 请求隧道绑定。 消息中携带定位信息。
其中, 所述的定位信息包括以下一种:
GTP peer的地址或者域名或者标识;
MAG的地址或者域名或者标识;
BRAS的地址或者域名或者标识;
其中 , BBF网络 /TWAN中发送消息的具体执行网元可以是位于 TWAN 网络的、 具备 GTP peer或者 MAG功能的新设网元 /模块; 也可以是增强的 了 GTP peer或者 MAG功能的 BRAS。
其中, 当 S2a接口釆用 GTP协议时, 对应的消息是 "创建会话请求" 消 息, BBF网络 /TWAN的角色是 GTP peer; 当 S2a接口釆用 PMIPv6协议时, 对应的消息是 PBU消息, BBF网络 /TWAN的角色是 MAG。 步骤 1004. P-GW发起 Gx会话建立并将定位信息发送给 PCRF。
其中, 如果 P-GW位于拜访地, 则 P-GW通过拜访地的 vPCRF把定位 信息发送给 hPCRF。
步骤 1005. PCRF通过定位信息查找 BPCF, 并与 BPCF建立 S9a接口上 的策略会话并把终端标识发送给 BPCF。
步骤 1006. 受到步骤 1005的触发, BPCF与 BBF网络的 BRAS执行策 略交互。
其中, 在步骤 1002完成之后, BBF网络就已经可能与 BPCF建立了本 地策略会话(例如, R接口上的策略会话) , 并且 BPCF从 BRAS处获知了 终端标识和固网线路的关系, BPCF根据终端标识和 S9a接口上行的策略会 话的关联关系(参见 1005的描述)、终端标识和固网线路的关系来关联本地 策略会话和 S9a接口上的策略会话, 也即建立了 S9a接口上的策略会话和固 网线路的对应关系, 后续 BPCF或者其他代理网元(比如 BRAS )执行 S9a 接口下发的策略或者对 S9a接口的策略执行接纳控制。
或者在步骤 1002完成之后, BBF网络就没有与 BPCF建立了本地策略 会话。 直到该步, BPCF才主动发起与 BRAS信令交互, BPCF从 BRAS处 获知终端标识和固网线路的对应关系, 从而根据终端标识建立固网线路和 S9a接口上的策略会话的对应关系, 后续 BPCF 或者其他代理网元(比如 BRAS )执行 S9a接口下发的策略或者对 S9a接口的策略执行接纳控制。
步骤 1007. P-GW回应 GTP协议的 "创建会话应答" 或者 PMIPv6协议 的 PB A消息给 BBF网络 /TWAN ,隧道绑定完成。该步骤可以发生在步骤 1004 之后。
步骤 1008. 认证步骤完成。
步骤 1009. 终端发送三层附着触发消息给 TWAN,比如 DHCP请求消息。 步骤 1010. 作为选项 B, 具体操作同 A, 参加步骤 1003-1007的描述。 步骤 1011. 三层附着完成消息。
如果 TWAG和 P-GW之间釆用的是 PMIP协议, 除了上述的步骤 1003 和 1004所示的方法外, 还可以通过 TWAG与 PCRF之间的 Gxa接口 (如果 开发了该接口)直接传输定位信息, 即, TWAG通过 Gxa接口发送该接口上 的网关控制会话建立请求消息携带定位消息给 PCRF, PCRF收到定位消息后, 后续操作同上。 实施例二
本实施例对应的是图 7架构和图 11的流程。 P-GW接收到从 T WAN发 送来的定位信息, P-GW通过 Gx接口把定位信息发送给 PCRF, PCRF根据 定位信息查找 BRAS, PCRF与 BRAS建立 Gxd接口上的策略会话并把终端 标识发送给 BRAS, BRAS根据终端标识定位该 Gxd接口上的策略会话所对 应的固网线路,并执行 Gxd接口下发的策略或者对 Gxd接口的策略执行接纳 控制。 流程步骤描述如下:
步骤 1101-步骤 1104. 同步骤 1001-步骤 1004。
其中在步骤 1101和步骤 1102步之后, TWAN (由 BRAS或者其他代理 网元执行 )获知终端标识( IMSI或者 NAI )和固网线路的关系, TWAN保 存所述关系。
步骤 1105. PCRF通过定位信息查找 BRAS , 并与 BRAS建立 Gxd接口 上的策略会话, 并把终端标识发送给 BRAS。
BRAS根据终端标识和 Gxd接口上行的策略会话的关联关系(参见 1105 的描述) 、 终端标识和固网线路的关系 (参见步骤 1101-1104的描述)来建 立 Gxd接口上的策略会话和固网线路的关系,并执行 Gxd接口下发的策略或 者对 Gxd接口的策略执行接纳控制。
步骤 1106-步骤 1110. 同步骤 1007-步骤 1011。
实施例三
本实施例对应的是图 8架构和图 12的流程。 P-GW接收到从 TWAN发 送来的定位信息, P-GW通过 Gx接口把定位信息发送给 PCRF, PCRF根据 定位信息查找 PCRF+ , PCRF与 PCRF+建立 IF- 1接口上的策略会话并把终 端标识发送给 PCRF+, PCRF+根据终端标识定位该 IF-1接口上的策略会话所 对应的固网线路, 并对 IF-1接口的策略执行接纳控制, 或者将策略发送到对 应的 BRAS用于执行策略。 流程步骤描述如下:
步骤 1201-步骤 1204. 同步骤 1001-步骤 1004。
其中在步骤 1201和步骤 1202, TWAN (由 BRAS或者其他代理网元执 行)获知终端标识(IMSI或者 NAI )和固网线路的关系。 TWAN或者保存 此关系, 或者通过无状态会话信令把该关系发送给 PCRF+ , 或者建立与 PCRF+的本地策略会话(比如 IF-2接口策略会话),并把该关系发送给 PCRF+。
步骤 1205. PCRF通过定位信息查找 PCRF+, 并与 PCRF+建立 IF-1接口 上的策略会话, 并把终端标识发送给 PCRF+。
步骤 1206. 受到步骤 1205的触发, PCRF+与 BBF网络的 BRAS执行策 略交互。
其中, 在步骤 1202完成之后, BBF网络就已经可能与 PCRF+建立了本 地策略会话(例如, IF-2接口上的策略会话 ) , 并且 PCRF+从 BRAS处获知 了终端标识和固网线路的关系, PCRF+根据终端标识和 IF-1接口上行的策略 会话的关联关系(参见 1205的描述)、 终端标识和固网线路的关系来关联本 地策略会话和 IF-1接口上的策略会话,也即建立了 IF-1接口上的策略会话和 固网线路的对应关系, 后续对 IF-1接口的策略执行接纳控制, 或者将策略发 送到对应的 BRAS用于执行策略。
或者, 在步骤 1202完成之后, BBF网络就没有与 BPCF建立了本地策 略会话。 直到该步, PCRF+才主动发起与 BRAS信令交互, PCRF+从 BRAS 处获知终端标识和固网线路的对应关系, 从而 居终端标识建立固网线路和 IF- 1接口上的策略会话的对应关系, 后续 IF- 1接口的策略执行接纳控制后, 将策略发送到对应的 BRAS用于执行策略。
步骤 1207-步骤 1211. 同步骤 1007-步骤 1011。
实施例四
本实施例对应的是图 9架构和图 13 的流程。 PCRF根据定位信息查找 BRAS, PCRF与 BRAS进行策略信令交互并把终端标识发送给 BRAS, BRAS 根据终端标识定位该 Gxd接口上的策略交互服务的固网线路,并将 Gxd接口 上的策略发送给 PCRF+, PCRF+对策略执行接纳控制。 流程步骤描述如下: 步骤 1301-步骤 1304. 同步骤 1001-步骤 1004。
其中在步骤 1301和步骤 1302步之后, TWAN (由 BRAS或者其他代理 网元执行)获知终端标识 (IMSI 或者 NAI )和固网线路的对应关系, 并且 TWAN可能建立了与 PCRF+的本地策略会话。
步骤 1305. PCRF通过定位信息查找 BRAS, PCRF与 BRAS进行策略信 令交互并把终端标识发送给 BRAS。 BRAS根据终端标识定位该 Gxd接口上 的策略交互服务的固网线路。
步骤 1306. 受到步骤 1305的触发, BRAS与 PCRF+执行策略交互。 BRAS 把 IF-1接口上的策略发送给 PCRF+, PCRF+对策略执行接纳控制。
其中, 在步骤 1302完成之后, BRAS已经可能与 PCRF+建立了 IF-2接 口上的策略会话, 该步骤只是用于更新策略会话; 或者直到该步, BRAS才 主动发起与 PCRF+的策略会话建立。
步骤 1307-步骤 1311. 同步骤 1007-步骤 1011。
实施例五
本实施例具体流程如图 14所示, 可与以上图 10-13中的流程相同, 其区 别仅在于步骤 1401中 TWAN向 P-GW发送定位信息的方式不同, 本实施例 中, 在发送给 P-GW的创建会话请求 /PBU消息中不以单独的信元携带 "定 位信息" , 而是将定位信息包含在创建会话请求/ PBU消息中的头信息中。 步 骤 1402中, P-GW通过解析 "创建会话请求/ PBU消息" 的头信息, 即可得 到定位信息。
此外, 本发明实施例中还提供了一种融合网络中的策略控制系统, 所述 系统包括策略授权执行单元, 以及 PCRF中的定位信息接收单元和策略交互 单元; 其中所述策略授权执行单元应用于 BPCF、 BNG或者融合的策略控制 实体中,
所述定位信息接收单元用于, 固网作为 TWAN接入演进的分组系统时, 根据 TWAN发送的定位信息定位到所述策略授权执行单元;
所述策略交互单元用于, 与所述策略授权执行单元建立策略会话, 将终 端标识发送给所述策略授权执行单元; 或者, 与所述策略授权执行单元进行 策略信令交互, 并将终端标识发送给所述策略授权执行单元;
所述策略授权执行单元用于, 根据接收到的所述终端标识, 定位到所述 策略会话或策略信令对应的固网线路。
进一步地, 所述策略授权执行单元还用于, 定位到所述策略会话或者策 略信令对应的固网线路后, 对所述策略交互单元下发的策略进行授权、 或者 执行策略。
进一步地, 所述系统还包括定位信息发送单元, 以及 P-GW中的定位信 息转发单元,其中所述定位信息发送单元应用于 BNG、或者 BNG以外的 GTP 端点或者 MAG,
所述定位信息发送单元用于, 通过在发送给 P-GW的创建会话请求消息 或者 PBU消息的头信息中包含所述定位信息,或者通过在所述创建会话请求 消息或者 PBU消息中携带包含所述定位信息的信元,将所述定位信息发送给 所述 PCRF;
所述定位信息转发单元用于, 根据接收到的所述创建会话请求消息或者 PBU消息的包含所述定位信息的信元或者消息头解析出所述定位信息, 并转 发给 PCRF;
其中, 所述定位信息包括: 所述 BNG的地址或者域名或者标识; 所述
GTP端点的地址或者域名或者标识; 或者, 所述 MAG的地址或者域名或者 标识。
以上仅为本发明的优选实施案例而已, 并不用于限制本发明, 本发明还 可有其他多种实施例, 在不背离本发明精神及其实质的情况下, 熟悉本领域 的技术人员可根据本发明做出各种相应的改变和变形, 但这些相应的改变和 变形都应属于本发明所附的权利要求的保护范围。
显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以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, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 并 且在某些情况下, 可以以不同于此处的顺序执行所示出或描述的步骤, 或者 将它们分别制作成各个集成电路模块, 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。
工业实用性 上述方案解决了 BBF接入网作为可信任的非 3GPP接入网接入 EPC时 的定位固网线路以及策略控制问题。

Claims

权 利 要 求 书
1、一种融合网络中的策略控制方法, 固网作为信任的无线局域网接入网 (TWAN)接入演进的分组系统时 ,
策略与计费规则功能实体 (PCRF)根据分组数据网络网关 (P-GW) 或信任 的 WLAN接入网关(TWAG )发送的定位信息定位到宽带论坛策略控制功能 实体 (BPCF)、 固网网关 (BNG)或者融合的策略控制实体, 与所述 BPCF、 所 述 BNG或者所述融合的策略控制实体建立策略会话, 并将终端标识发送给 所述 BPCF、 所述 BNG或者所述融合的策略控制实体;
所述 BPCF、所述 BNG或者所述融合的策略控制实体根据所述终端标识, 定位到所述策略会话对应的固网线路。
2、 如权利要求 1所述的方法, 其中, 所述方法还包括:
定位到所述策略会话对应的固网线路后, 所述 BPCF、 所述 BNG或者所 述融合的策略控制实体对所述 PCRF下发的策略进行授权, 或者执行策略。
3、 如权利要求 1或 2所述的方法, 其中,
所述定位信息由所述 BNG发送,或者由所述 BNG以外的通用分组无线 服务隧道协议 (GTP)端点或者移动接入网关(MAG)发送给所述 P-GW, 由所 述 P-GW发送给所述 PCRF; 或者所述定位信息由所述 TWAG发送给所述 PCRF。
4、 如权利要求 3所述的方法, 其中,
所述定位信息包括:
所述 BNG的地址或者域名或者标识;
所述 GTP端点的地址或者域名或者标识; 或者,
所述 MAG的地址或者域名或者标识。
5、 如权利要求 2所述的方法, 其中, 所述方法还包括:
所述 PCRF 4艮据所述定位信息定位到所述 BPCF, 与所述 BPCF建立策 略会话并将所述终端标识发送给所述 BPCF;
所述 BPCF根据所述终端标识, 以及从所述 BNG获知的所述终端接入 时建立的终端标识与固网线路的对应关系, 定位到所述策略会话对应的固网 执行策略。
6、 如权利要求 2所述的方法, 其中, 所述方法还包括:
所述 PCRF根据所述定位信息定位到所述 BNG, 与所述 BNG建立策略 会话并将所述终端标识发送给所述 BNG;
所述 BNG根据所述终端标识, 以及所述终端接入时建立的终端标识与 固网线路的对应关系, 定位到所述策略会话对应的固网线路后, 所述 BNG 对所述 PCRF下发的策略进行授权, 或者执行策略。
7、 如权利要求 2所述的方法, 其中, 所述方法还包括:
所述 PCRF根据所述定位信息定位到所述融合的策略控制实体, 与所述 融合的策略控制实体建立策略会话并将所述终端标识发送给所述融合的策略 控制实体;
所述融合的策略控制实体根据所述终端标识, 以及从所述 BNG获知的 所述终端接入时建立的终端标识与固网线路的对应关系, 定位到所述策略会 话对应的固网线路后, 所述融合的策略控制实体对所述 PCRF下发的策略进 行授权, 或者执行策略。
8、 如权利要求 5或 7所述的方法, 其中,
所述 BPCF或者所述融合的策略控制实体通过以下方式从所述 BNG获 知所述终端接入时建立的终端标识与固网线路的对应关系:
所述 BNG在所述终端接入时获知所述终端标识与固网线路的对应关系 后, 通过与所述 BPCF或者所述融合的策略控制实体建立本地策略会话或者 通过无状态会话信令, 将所述终端标识与固网线路的对应关系发送给所述 BPCF或者所述融合的策略控制实体;
或者, 所述 BPCF或者所述融合的策略控制实体从所述 PCRF接收到所 述终端标识后, 向所述 BNG获取所述终端标识与固网线路的对应关系。
9、 如权利要求 3所述的方法, 其中, 位信息:
向所述 P-GW发送创建会话请求消息或者 PBU消息,在所述创建会话请 求消息或者 PBU消息中携带包含所述定位信息的信元;
或者,在发送给所述 P-GW的创建会话请求消息或者 PBU消息的头信息 中包含所述定位信息, 所述 P-GW解析出所述定位信息。
10、 如权利要求 3所述的方法, 其中,
所述定位信息包括:
用户设备 UE使用的服务集标识 SSID;
用户设备 UE所在的地理位置信息; 或者,
基本服务集标识 BSSID。
11、一种融合网络中的策略控制方法, 固网作为 TWAN接入演进的分组 系统时,
PCRF根据接收的 P-GW或者 TWAG发送的定位信息定位到固网网关 (BNG), 与所述 BNG进行策略信令交互, 并将终端标识发送给所述 BNG;
所述 BNG 居所述终端标识定位固网线路。
12、 如权利要求 11所述的方法, 其中, 所述方法还包括:
所述 BNG将所述 PCRF下发的策略发送给所述融合的策略控制实体, 所述融合的策略控制实体对所述 PCRF下发的策略进行授权后, 发送给所述 BNG执行。
13、 如权利要求 11所述的方法, 其中,
所述定位信息由所述 BNG发送, 或者由 GTP端点或者 MAG发送给所 述 P-GW; 或者所述定位信息由所述 TWAG发送给所述 PCRF;
所述定位信息包括: 所述 BNG的地址或者域名或者标识; 所述 GTP端 点的地址或者域名或者标识; 所述 MAG的地址或者域名或者标识; 用户设 备 UE使用的服务集标识 SSID; 用户设备 UE所在的地理位置信息; 或者, 基本服务集标识 BSSID。
14、一种融合网络中的策略控制系统,所述系统包括策略授权执行单元, 以及 PCRF中的定位信息接收单元和策略交互单元; 其中所述策略授权执行 单元应用于 BPCF、 BNG或者融合的策略控制实体中,
所述定位信息接收单元设置为:固网作为 TWAN接入演进的分组系统时, 根据 TWAN发送的定位信息定位到所述策略授权执行单元;
所述策略交互单元设置为: 与所述策略授权执行单元建立策略会话, 将 终端标识发送给所述策略授权执行单元; 或者, 与所述策略授权执行单元进 行策略信令交互, 并将终端标识发送给所述策略授权执行单元;
所述策略授权执行单元设置为: 根据接收到的所述终端标识, 定位到所 述策略会话或策略信令对应的固网线路。
15、 如权利要求 14所述的系统, 其中,
所述策略授权执行单元还设置为: 定位到所述策略会话或者策略信令对 应的固网线路后,对所述策略交互单元下发的策略进行授权、或者执行策略。
16、 如权利要求 14或 15所述的系统, 其中, 所述系统还包括定位信息 发送单元, 以及 P-GW中的定位信息转发单元, 其中所述定位信息发送单元 应用于 BNG、 或者 BNG以外的 GTP端点或者 MAG,
所述定位信息发送单元设置为: 通过在发送给 P-GW的创建会话请求消 息或者 PBU消息的头信息中包含所述定位信息,或者通过在所述创建会话请 求消息或者 PBU消息中携带包含所述定位信息的信元,将所述定位信息发送 给所述 PCRF;
所述定位信息转发单元设置为: 根据接收到的所述创建会话请求消息或 者 PBU消息的包含所述定位信息的信元或者消息头解析出所述定位信息,并 转发给 PCRF;
其中, 所述定位信息包括: 所述 BNG的地址或者域名或者标识; 所述 GTP端点的地址或者域名或者标识; 所述 MAG的地址或者域名或者标识; 用户设备 UE使用的服务集标识 SSID; 用户设备 UE所在的地理位置信息; 或者, 基本服务集标识 BSSID。
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