WO2011088702A1 - Method and system for controlling resources in full-service convergence network - Google Patents

Method and system for controlling resources in full-service convergence network Download PDF

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Publication number
WO2011088702A1
WO2011088702A1 PCT/CN2010/078871 CN2010078871W WO2011088702A1 WO 2011088702 A1 WO2011088702 A1 WO 2011088702A1 CN 2010078871 W CN2010078871 W CN 2010078871W WO 2011088702 A1 WO2011088702 A1 WO 2011088702A1
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service
policy
pcrf
pef
network
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PCT/CN2010/078871
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French (fr)
Chinese (zh)
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芮通
孙默
吴锦花
周晓云
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中兴通讯股份有限公司
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Publication of WO2011088702A1 publication Critical patent/WO2011088702A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and system for controlling resources in a full service convergence network.
  • the Evolved Packet System (EPS) proposed by the 3GPP is evolved by the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and the Mobility (Mobility).
  • Management Entity MME
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • HSS Home Subscriber Server
  • AAA 3GPP Certification Authentication, Authorization and Accounting
  • PCRF Policy and Charging Rules Function
  • the mobility management entity is responsible for the control planes such as mobility management, non-access stratum signaling processing, and user mobility management context management;
  • S-GW is the access gateway connected to E-UTRAN. The device forwards data between the E-UTRAN and the P-GW, and is responsible for buffering the paging waiting data;
  • the P-GW is a border gateway of the EPS and the Packet Data Network (PDN) network, and is responsible for the connection of the PDN.
  • Incoming and forwarding data between EPS and PDN; S-GW and P-GW are both core network gateways;
  • PCRF is a policy and charging rule function entity, through interface Rx and carrier network protocol (IP) service network Connected to obtain service information.
  • IP carrier network protocol
  • the EPS system supports interworking with non-3GPP systems, and is implemented through the S2a/S2b/S2c interface, where
  • the P-GW in the EPS system acts as an anchor 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.
  • ePDG evolved Evolved Packet Data Gateway
  • UE User Equipment
  • S2c can implement user plane related control and mobility support
  • the supported mobility management protocol supports the dual stack.
  • Mobile IPv6 Support for Dual Stack Hosts and Routers DSMIPv6
  • the PCRF communicates with other network elements through the following interfaces:
  • PCEF Policy and Charging Enforcement Function
  • the S-GW When the interface between the P-GW and the S-GW is based on the PMIIV6, the S-GW has the function of performing QoS control on the service data flow by the Bearer Binding and Event Report Function (BBERF) entity.
  • BBERF Bearer Binding and Event Report Function
  • the PCRF exchanges information with the S-GW through the Gxc interface.
  • the PCRF exchanges information with the trusted non-3GPP access gateway through the Gxa interface;
  • the visited PCRF and the home PCRF communicate through the S9 interface, and the PCRF obtains the service information for formulating the PCC policy from the application function (AF) of the service through the Rx interface.
  • AF application function
  • the corresponding PDN network can be found by Access Point Name (APN).
  • a connection from a UE to a PDN network is usually referred to as an IP Connectivity Access Network (IP-CAN) session.
  • IP-CAN IP Connectivity Access Network
  • the BBERF and the PCEF respectively establish a Diameter session with the PCRF, and through these Diameter sessions, the policy charging information for controlling the IP-CAN session and the service information for formulating the policy are transmitted.
  • PCC policy and charging control and execution with PCRF as the core
  • PCRF can dynamically send a PCC policy to the PCEF, which includes QoS and charging information.
  • the PCC policy is the service related information provided by the PCRF according to the AF, the bearer related information reported by the PCEF, and the subscription of the user in the SPR. Information is formulated.
  • the PCC system is shown in Figure 2:
  • the PCRF is responsible for the formulation of the policy and the charging rules.
  • the PCC policy and the charging rules are sent to the PCEF through the Gx interface.
  • the PCEF installs and executes the PCC policy, and reports related events, and exchanges accounting information with the charging system.
  • the BBERF receives the QoS rules of the service from the PCRF through the Gxx interface, and does not exchange accounting information with the charging system. It is only responsible for the bearer binding and reporting of related events.
  • the AF provides service information to the PCRF through the Rx interface
  • the Subscriber Profile Repository stores the service information subscribed by the user.
  • the PCRF can query the SPR for the service information subscribed by the user through the Sp interface.
  • PCEF sends online charging information to the online charging system through the Gy interface (Online Charging
  • OSC Offline Charging System
  • the AF initiates a policy control request to the PCRF based on the QoS negotiated by the service layer, the PCRF performs authorization according to the user subscription information (obtained from the SPR) and the operator policy, and generates a corresponding PCC policy, which is sent to the PCEF function in the GW.
  • the PCC policy includes the following information: a service flow quintuple, QoS information (such as QCI, uplink and downlink bandwidth, etc.), and charging information (such as Charging Key).
  • the UE and the GW establish a corresponding bearer according to the QoS of the service or modify the QoS attribute of the existing bearer, and perform bearer binding of the uplink service traffic on the UE side, that is, record which bearer the service flow should be transmitted from;
  • the bearer binding of the downlink traffic is performed, and the corresponding QoS priority label (such as DSCP) is used for the uplink traffic to ensure the QoS priority of the uplink traffic in the backbone network, and the service flow is compared according to the charging information in the PCC policy. Perform billing control.
  • the S-GW and the P-GW can communicate using either GTP or PMIP protocols.
  • GTP protocol the bearer is established between the UE and the P-GW. Therefore, only the PCEF needs to perform policy and charging control on the P-GW.
  • PMIP protocol the bearer is established in the UE and Between the S-GWs, it is necessary to perform bearer binding on the S-GW through the BBERF function, to ensure the QoS of the service flow between the S-GW and the UE, and to pass the PCEF function on the P-GW. Line QoS and charging control.
  • the Policy and Charging Control (PCC) system is located between the service control layer and the bearer layer of the network, and can provide QoS support and corresponding charging control for the service layer. An important operational support system for QoS assurance.
  • the PCC system was established for the wireless access method of the 3rd Generation Partnership Project (3GPP). For the entire network operator, the access mode of the user also includes the fixed network access. In the prior art, there is no method for uniformly controlling the charging of the fixed network and the mobile network based on the QoS policy, so that the service cannot be based on the QoS. Perform billing control.
  • 3GPP 3rd Generation Partnership Project
  • the invention provides a method and system for controlling resources in a full service convergence network, and implements unified QoS policy control for a fixed broadband network and a mobile network.
  • the present invention provides the following technical solutions:
  • a method of controlling resources in a full service convergence network including:
  • the policy and charging rule function (PCRF) performs admission control and policy decision, and sends the policy of the service to the policy execution function (PEF).
  • the PCRF may perform admission control by: determining whether there are sufficient resources available; accepting the service when it is determined that the available resources are sufficient; rejecting the service when determining that the available resources are insufficient.
  • the AF may send the information of the service to the PCRF under any of the following conditions: when the session is established; during the session, when the quality of service policy changes.
  • a change in the quality of service policy can mean: the subscriber's subscription information changes, and/or the carrier configuration changes.
  • the PCRF can send the policy of the service to the PEF after accepting the service.
  • the PEF may reside on a transport layer network element of the fixed network, and the transport layer network element may include one or more of the following network elements: a home gateway (CNG), an access node (AN), and a broadband network gateway (BNG). .
  • the policy of the service may include a quality of service (QoS) policy and/or a charging policy.
  • QoS quality of service
  • the PCRF can send the policy of the service to the PEF through the Gxx interface.
  • the present invention also provides a system for controlling resources in a full service convergence network, including PCRF, PEF, and AF, wherein the PCRF is configured to perform admission control and policy decision after receiving information from the AF service, and Transmitting the policy of the service to a policy enforcement function (PEF); the PEF is configured to receive the policy delivered by the PCRF and execute the policy;
  • PEF policy enforcement function
  • the AF is set to send information of the service to the PCRF.
  • the PCRF may include: a judging module, which may be configured to determine whether the available resources on the path through which the service flow passes is sufficient; and a processing module, which may be configured to accept the service when the judging module determines that the available resources are sufficient; The judging module rejects the service when it determines that the available resources are insufficient.
  • the AF can be set to send the information of the service to the PCRF under any of the following conditions: When the session is established; During the session, when the quality of service policy changes. A change in the quality of service policy can mean: the subscriber's subscription information changes, and/or the carrier configuration changes.
  • the PCRF can be set to send the policy of the service to the PEF after accepting the service.
  • the PEF may reside on a transport layer network element, which may include one or more of the following network elements: CNG, AN, and BNG.
  • the policy of the service may include a QoS policy and/or a charging policy.
  • the PCRF can send a service policy to the PEF through the Gxx interface.
  • the technical solution provided by the present invention ensures the QoS of the accepted service flow by performing admission control on the resource request in the fixed broadband network, and implements unified QoS policy control for the fixed broadband network and the mobile network, thereby achieving charging based on the service-based QoS.
  • the purpose of control is not limited to:
  • FIG. 1 is a schematic structural view of an EPS system in the prior art
  • 2 is a schematic structural diagram of a PCC system in the prior art
  • 3 is a schematic structural diagram of a fixed broadband network in the prior art
  • 4a is a schematic structural diagram of a PCC system provided by the present invention.
  • 4b is another schematic structural diagram of a PCC system provided by the present invention.
  • FIG. 5 is a schematic structural diagram of a full service convergence network provided by the present invention.
  • FIG. 6 is a flowchart of a method for admission control in a full service convergence network according to Embodiment 1;
  • FIG. 7 is a flowchart of a method for admission control in a full service convergence network according to Embodiment 2.
  • a broadband access network (such as DSL) in a fixed broadband network includes user terminals.
  • the UE such as PC, etc.
  • access node AN such as DSLAM
  • access server AS such as BRAS, BNG, etc.
  • the AN accesses the AS through a number of Ethernet switches that are converged.
  • the AS accesses the metropolitan area network and the metropolitan area network accesses the backbone network.
  • the AS is a key node for the operator to conduct services, and is connected to the authentication server (AAA or NASS) for sending the username and password of the accessed UE to the authentication server for authentication, and assigning an IP address to the UE.
  • AAA authentication server
  • the PCC system provided by the present invention has the following features:
  • the PCRF formulates policies based on the user subscription, the negotiation result of the service layer, and the carrier configuration. If the user accesses the broadband through the fixed network, the PCRF is also used to maintain the network topology and resource status for the service. Provide admission control based on network resource status, and determine the enforcement point of the policy, and distribute the policy to the corresponding execution point.
  • the PCRF can obtain the subscription information of the user through SPR.
  • the SPR can be deployed as the Front End (FE) of the User Data Convergence (UDC), or can be deployed separately (as shown in Figure 4a);
  • the user's subscription information can be obtained through NASS and/or AAA, where NASS and AAA can be deployed separately or together (as shown in Figure 4b).
  • the PEF (Policy Enforcement Function) entity resides on the transport layer NE and performs the policy delivered from the PCRF.
  • the fixed broadband network user terminal accesses the carrier network through a Customer Network Gateway (CNG), and is connected to an AN entity (such as a DSLAM, etc.).
  • CNG Customer Network Gateway
  • AN entity such as a DSLAM, etc.
  • BNG Broadband Network Gateway
  • the IP service server is usually deployed in the metro backbone network, as shown in Figure 1 for data flow routing.
  • the PCRF sends the policy to the fixed network transport layer network element, where the transport layer network element resides in the PEF entity.
  • the user data can also access the packet data network gateway through the AN entity, so as to access the IP service network provided by the operator.
  • the data flow route diagram 2 is shown.
  • the PCRF needs to send the corresponding policy to the packet data gateway.
  • the PCRF has the function of sensing and maintaining the topology and resource status of the fixed network, and provides admission control for the resource request of the service according to the network topology and resource status of the fixed network, and according to the service situation and the transport layer.
  • the actual capability of the network element sends a policy to the corresponding transport layer network element, where the transport layer network element can be at least one of CNG, AN, and BNG.
  • the PCRF sends a policy to the transport network element through the Gxx interface.
  • Step 601 Perform service negotiation between the UE and the service function AF, including determining a QoS parameter of the service flow.
  • Step 602 The AF initiates a policy control request to the PCRF according to the negotiated QoS parameter.
  • Step 603 The PCRF formulates a policy according to the service subscription information of the user, the policy of the operator, and the service control information in the request message sent by the AF, where the service is The subscription information is obtained from the SPR, where the policy includes a QoS policy and/or a charging policy;
  • Step 604 If the user accesses from the fixed network, the PCRF performs a resource availability check on the resource request, that is, determines whether there are enough available resources (such as bandwidth) on the path through which the service flow passes, and if so, accepts the user initiated Resource request, and step 605 is performed; if not, the resource request is rejected, and the process ends;
  • Step 605 The PCRF sends a policy to the transport layer network element, where the policy includes a QoS policy and
  • the PCRF sends a policy to the fixed network transport layer network element. If the user accesses the IP service server through the packet data network element, the PCRF sends the network element and the packet to the fixed network bearer layer. The data network element issues a policy.
  • Step 606 The transport layer network element executes the policy, and manages the service flow according to the policy content, including marking a QoS priority, limiting a bandwidth, and the like.
  • Step 701 During the session, the PCRF is internally or externally triggered (for example, the subscription information of the user changes; the configuration of the carrier changes), and the QoS policy of the user is modified.
  • Step 702 If the user is from the fixed network The access, the PCRF performs a resource availability check on the resource update, determines whether there is sufficient resources on the path through which the user's service flow passes to ensure the execution of the update, and if so, accepts the resource update request, and performs step 703; if not, The resource update request is rejected and the process ends.
  • Step 703 The PCRF sends an updated policy to the corresponding transport layer network element, where the policy includes a QoS policy and/or a charging policy.
  • Step 704 The transport layer network element performs an update policy, and manages the service flow according to the policy content, including marking a QoS priority, limiting a bandwidth, and the like.
  • the PCRF maintains a list of network topology and resource status.
  • the bandwidth of the paths al, a2, a3, and a4 is 10M, and the upstream and downstream bandwidths of the paths bl and b2 are 15M.
  • UE1 initiates a service that requires QoS guarantee to a server in the metropolitan area network.
  • the 10F uplink and downlink bandwidth is required.
  • the PCRF performs the resource availability check and accepts the resource request to allocate the path a1 to the UE1.
  • the topology and resource status maintained in the PCRF need to be updated, and the remaining upper and lower behaviors of the path a1 are 0M.
  • the remaining uplink and downlink bandwidth of the path bl is 5M.
  • the PCRF needs to deliver a QoS policy to other network elements.
  • the upstream traffic of the service flow is marked with a high priority QoS flag; and is sent to the egress router of the server in the metropolitan area network.
  • the downstream traffic of the traffic flow is marked with a high priority QoS.
  • the PCRF also needs to send the charging policy of UE1 to the AN point.
  • the PCRF determines that the available bandwidth on the path a2 is 10M according to the locally maintained network topology and resource status list. The remaining available bandwidth on the bl is only 5M, and there is not enough resources for the transmission of the UE2 service flow.
  • the PCRF rejects the resource request of the UE2, and ensures that the transmission of the admitted service flow (ie, the service flow of the UE1) is not affected.
  • the PCRF After detecting the release of the occupied bandwidth by the UE1, the PCRF updates the locally maintained network topology and the resource status list. After the update, the available bandwidth of the path bl is 15M, and the PCRF accepts the resource request of the UE2.
  • the present invention also provides a system for controlling resources in a full service convergence network, including PCRF, PEF, and AF, wherein the PCRF is configured to perform admission control and policy decision after receiving information from the AF service, and The policy of the service is sent to the policy enforcement function (PEF); the PEF is set to receive the policy delivered by the PCRF and executed; and the AF is set to send the information of the service to the PCRF.
  • PCRF policy enforcement function
  • the PCRF may include: a judging module, which may be configured to determine whether the available resources on the path through which the service flow passes is sufficient; and a processing module, which may be configured to: when the judging module determines that the available resources are sufficient, accept the service; When the judging module determines that the available resources are insufficient, the service is rejected.
  • the AF can be set to send the information of the service to the PCRF under any of the following conditions: When the session is established; During the session, when the quality of service policy changes. A change in the quality of service policy can mean: the subscriber's subscription information changes, and/or the carrier configuration changes.
  • the PCRF can be set to send the policy of the service to the PEF after accepting the service.
  • the PEF may reside on a transport layer network element, which may include one or more of the following network elements: CNG, AN, and BNG.
  • the policy of the service may include a QoS policy and/or a charging policy.
  • the PCRF can send a service policy to the PEF through the Gxx interface.
  • the technical solution provided by the present invention ensures the QoS of the service flow transmission by accepting the admission control of the resource request in the fixed broadband network, and realizes the unified QoS policy control of the fixed broadband network and the mobile network, thereby achieving the service-based QoS.
  • each functional unit in each embodiment of the present invention may be implemented in the form of hardware, or may be implemented in the form of a software functional module.
  • the integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.
  • the above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the present invention ensures admission of service flows by ensuring admission control of resource requests in a fixed broadband network, and implements unified QoS policy control for fixed broadband networks and mobile networks, thereby achieving service-based QoS.
  • the purpose of charging control is a simple operation of charging control.

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Abstract

A method and a system for controlling resources in a full-service convergence network are provided in the present invention, and the method includes: after receiving service information from an Application Function (AF), a Policy and Charging Rules Function (PCRF) implementing an admission control and a policy decision, and distributing the policy of the service to a Policy Enforcement Function (PEF). With the present invention, a Quality of Service (QoS) of the admitted service streams is able to be ensured, and the unified QoS policy control for a fixed wideband network and a mobile network is able to be realized, so that the goal of a charging control based on the service QoS is able to be reached.

Description

在全业务融合网络中控制资源的方法和***  Method and system for controlling resources in a full service convergence network
技术领域 Technical field
本发明涉及通信领域， 尤其涉及一种在全业务融合网络中控制资源的方 法和***。  The present invention relates to the field of communications, and in particular, to a method and system for controlling resources in a full service convergence network.
背景技术 Background technique
如图 1所示， 3GPP提出的演进的分组***（ Evolved Packet System , EPS ) 由演进的通用移动通信***陆地无线接入网 （ Evolved Universal Terrestrial Radio Access Network, E-UTRAN ) 、 移动管理单元 ( Mobility Management Entity, MME ) 、 服务网关 （ Serving Gateway, S-GW ) 、 分组数据网络网关 ( Packet Data Network Gateway, P-GW或者 PDN GW)、 归属用户服务器 ( Home Subscriber Server, HSS ) 、 3 GPP的认证授权计费 （Authentication, Authorization and Accounting , AAA )服务器、策略和计费规则功能（ Policy and Charging Rules Function, PCRF ) 实体及其他支撑节点组成。  As shown in FIG. 1, the Evolved Packet System (EPS) proposed by the 3GPP is evolved by the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and the Mobility (Mobility). Management Entity, MME), Serving Gateway (S-GW), Packet Data Network Gateway (P-GW or PDN GW), Home Subscriber Server (HSS), 3GPP Certification Authentication, Authorization and Accounting (AAA) server, Policy and Charging Rules Function (PCRF) entity and other supporting nodes.
在 EPS的***中， 移动性管理实体负责移动性管理、 非接入层信令的处 理和用户移动管理上下文的管理等控制面的相关工作； S-GW是与 E-UTRAN 相连的接入网关设备， 在 E-UTRAN和 P-GW之间转发数据， 并且负责对寻 呼等待数据进行緩存； P-GW是 EPS与分组数据网络（ Packet Data Network , PDN ) 网络的边界网关， 负责 PDN的接入及在 EPS与 PDN间转发数据等； S-GW和 P-GW都属于核心网网关； PCRF是策略和计费规则功能实体， 通过 接口 Rx和运营商网络协议（Internet Protocol, IP )业务网络相连， 获取业务 信息， 此外， 还通过 Gx/Gxa/Gxc接口与网络中的网关设备相连， 负责发起 IP 承载的建立， 保证业务数据的 QoS, 并进行相应的计费控制。  In the EPS system, the mobility management entity is responsible for the control planes such as mobility management, non-access stratum signaling processing, and user mobility management context management; S-GW is the access gateway connected to E-UTRAN. The device forwards data between the E-UTRAN and the P-GW, and is responsible for buffering the paging waiting data; the P-GW is a border gateway of the EPS and the Packet Data Network (PDN) network, and is responsible for the connection of the PDN. Incoming and forwarding data between EPS and PDN; S-GW and P-GW are both core network gateways; PCRF is a policy and charging rule function entity, through interface Rx and carrier network protocol (IP) service network Connected to obtain service information. In addition, it is connected to the gateway device in the network through the Gx/Gxa/Gxc interface. It is responsible for initiating the establishment of the IP bearer, guaranteeing the QoS of the service data, and performing corresponding charging control.
EPS***支持与非 3GPP***的互通， 通过 S2a/S2b/S2c接口实现， 其中 The EPS system supports interworking with non-3GPP systems, and is implemented through the S2a/S2b/S2c interface, where
EPS***中的 P-GW作为 3GPP与非 3GPP***间的锚点。 在 EPS的***中， 非 3GPP***被分为可信任非 3GPP IP接入和不可信任非 3GPP IP接入。 The P-GW in the EPS system acts as an anchor between the 3GPP and the non-3GPP system. In the EPS system, the non-3GPP system is divided into trusted non-3GPP IP access and untrusted non-3GPP IP access.
下面对非 3GPP***接入 P-GW的方式进行说明: 可信任非 3GPP IP接入可直接通过 S2a接口与 P-GW连接； 不可信任非 3GPP IP接入需经过演进的分组数据网关 （Evolved Packet Data Gateway, ePDG )与 P-GW相连， 其中 ePDG与 P-GW间的接口为 S2b; 用户设备 ( User Equipment, UE )通过接口 S2c与 P-GW连接， 其中 S2c 可实现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支持双 栈的移动 IPv6 ( Mobile IPv6 Support for Dual Stack Hosts and Routers , DSMIPv6)。 The following describes the manner in which the non-3GPP system accesses the P-GW: Trusted non-3GPP IP access can be directly connected to the P-GW through the S2a interface; untrusted non-3GPP IP access is connected to the P-GW through an evolved Evolved Packet Data Gateway (ePDG), where ePDG and P - The interface between the GWs is S2b; the User Equipment (UE) is connected to the P-GW through the interface S2c, wherein the S2c can implement user plane related control and mobility support, and the supported mobility management protocol supports the dual stack. Mobile IPv6 Support for Dual Stack Hosts and Routers (DSMIPv6).
在 EPS***中， PCRF通过如下接口与其他网元进行通信：  In the EPS system, the PCRF communicates with other network elements through the following interfaces:
当策略和计费执行功能（ Policy and Charging Enforcement Function , PCEF ) 实体驻留在 P-GW中， PCRF与 P-GW之间通过 Gx接***换信息；  When the Policy and Charging Enforcement Function (PCEF) entity resides in the P-GW, the PCRF and the P-GW exchange information through the Gx interface.
当 P-GW与 S-GW间的接口是基于 PMIIV6时， S-GW具有承载绑定和事 件才艮告功能（Bearer Binding and Event Report Function, BBERF ) 实体对业务 数据流进行 QoS控制的功能， PCRF通过 Gxc接口与 S-GW交换信息；  When the interface between the P-GW and the S-GW is based on the PMIIV6, the S-GW has the function of performing QoS control on the service data flow by the Bearer Binding and Event Report Function (BBERF) entity. The PCRF exchanges information with the S-GW through the Gxc interface.
当用户通过驻留有 BBERF的可信任非 3GPP接入***接入 EPS***时， PCRF间通过 Gxa接口与可信任非 3GPP接入网关交换信息；  When a user accesses the EPS system through a trusted non-3GPP access system that resides in BBERF, the PCRF exchanges information with the trusted non-3GPP access gateway through the Gxa interface;
当 UE漫游时， 拜访地 PCRF和归属地 PCRF通过 S9接口进行通信， 同 时 PCRF通过 Rx接口从提供业务的应用功能（Application Function, AF )获 取用于制定 PCC策略的业务信息。  When the UE roams, the visited PCRF and the home PCRF communicate through the S9 interface, and the PCRF obtains the service information for formulating the PCC policy from the application function (AF) of the service through the Rx interface.
在 3GPP中， 通过接入点名称（ Access Point Name, APN )可以找到对应 的 PDN网络。通常将 UE到 PDN网络的一个连接称为一个 IP连接接入网（ IP Connectivity Access Network, IP-CAN )会话。 在建立 IP-CAN会话的过程中， BBERF和 PCEF分别与 PCRF之间建立 Diameter会话，通过这些 Diameter会 话来传送对 IP-CAN会话进行控制的策略计费信息和用于制定策略的业务信 息等。  In 3GPP, the corresponding PDN network can be found by Access Point Name (APN). A connection from a UE to a PDN network is usually referred to as an IP Connectivity Access Network (IP-CAN) session. During the establishment of the IP-CAN session, the BBERF and the PCEF respectively establish a Diameter session with the PCRF, and through these Diameter sessions, the policy charging information for controlling the IP-CAN session and the service information for formulating the policy are transmitted.
在 EPS***中， 以 PCRF为核心的策略和计费控制与执行等网元和功能 通常成为 PCC***。在 PCC***中， PCRF可以动态地下发 PCC策略给 PCEF , 该 PCC策略中包含 QoS和计费的信息。其中所述 PCC策略是 PCRF根据 AF 提供的业务相关信息、 PCEF上报的承载相关信息以及 SPR中用户签约的业 务信息制定的。 其中 PCC***如图 2所示： In the EPS system, network elements and functions such as policy and charging control and execution with PCRF as the core are usually PCC systems. In the PCC system, the PCRF can dynamically send a PCC policy to the PCEF, which includes QoS and charging information. The PCC policy is the service related information provided by the PCRF according to the AF, the bearer related information reported by the PCEF, and the subscription of the user in the SPR. Information is formulated. The PCC system is shown in Figure 2:
PCRF负责策略和计费规则的制定， 通过 Gx接口将制定的 PCC策略和 计费规则下发给 PCEF, PCEF安装、 执行 PCC策略， 并上报相关事件， 与计 费***交互计费信息；  The PCRF is responsible for the formulation of the policy and the charging rules. The PCC policy and the charging rules are sent to the PCEF through the Gx interface. The PCEF installs and executes the PCC policy, and reports related events, and exchanges accounting information with the charging system.
BBERF通过 Gxx接口从 PCRF接收业务的 QoS规则 , 不和计费***交 互计费信息， 只负责承载绑定和相关事件的上报；  The BBERF receives the QoS rules of the service from the PCRF through the Gxx interface, and does not exchange accounting information with the charging system. It is only responsible for the bearer binding and reporting of related events.
AF通过 Rx接口向 PCRF提供业务信息；  The AF provides service information to the PCRF through the Rx interface;
用户属性存储（ Subscriber Profile Repository , SPR )保存用户签约的业 务信息， PCRF可以通过 Sp接口向 SPR查询用户签约的业务信息；  The Subscriber Profile Repository (SPR) stores the service information subscribed by the user. The PCRF can query the SPR for the service information subscribed by the user through the Sp interface.
PCEF通过 Gy接口将在线计费信息发送给在线计费***（ Online Charging PCEF sends online charging information to the online charging system through the Gy interface (Online Charging
System , OSC ) 负责在线计费的统计， 通过 Gz接口将离线计费信息发送给 离线计费***（ Offline Charging System, OFCS ) 。 System, OSC) is responsible for online charging statistics, and sends offline charging information to the Offline Charging System (OFCS) through the Gz interface.
在 3GPP移动网络中， UE和 GW之间可以建立多条不同 QoS优先级的 承载。 通过将不同 QoS的业务流在对应 Qos优先级的承载上传输， 保证业务 的 QoS。 当 AF根据业务层协商的 QoS向 PCRF发起策略控制请求时， PCRF 会根据用户签约信息（从 SPR中获取） 以及运营商策略进行授权， 生成相应 的 PCC策略， 下发给 GW中的 PCEF功能。 其中所述 PCC策略包括如下信 息：业务流五元组、 QoS信息（如 QCI、上下行带宽等）、计费信息（如 Charging Key等） 。 UE和 GW之间会根据业务的 QoS建立相应的承载或者修改已有 承载的 QoS属性， 并在 UE侧执行上行业务流量的承载绑定， 即记录该业务 流应该从哪个承载传输； 在 GW侧执行下行业务流量的承载绑定， 并且对于 上行流量打相应的 QoS优先级标签（如 DSCP ) , 以保证上行流量在骨干网 中的 QoS优先级， 同时根据 PCC策略中的计费信息对业务流进行计费控制。  In a 3GPP mobile network, multiple bearers with different QoS priorities can be established between the UE and the GW. The service QoS is guaranteed by transmitting traffic of different QoS on the bearer corresponding to the Qos priority. When the AF initiates a policy control request to the PCRF based on the QoS negotiated by the service layer, the PCRF performs authorization according to the user subscription information (obtained from the SPR) and the operator policy, and generates a corresponding PCC policy, which is sent to the PCEF function in the GW. The PCC policy includes the following information: a service flow quintuple, QoS information (such as QCI, uplink and downlink bandwidth, etc.), and charging information (such as Charging Key). The UE and the GW establish a corresponding bearer according to the QoS of the service or modify the QoS attribute of the existing bearer, and perform bearer binding of the uplink service traffic on the UE side, that is, record which bearer the service flow should be transmitted from; The bearer binding of the downlink traffic is performed, and the corresponding QoS priority label (such as DSCP) is used for the uplink traffic to ensure the QoS priority of the uplink traffic in the backbone network, and the service flow is compared according to the charging information in the PCC policy. Perform billing control.
在 R8中， S-GW和 P-GW之间可以釆用 GTP或者 PMIP两种协议进行通 信。 当釆用 GTP协议时， 承载是建立在 UE和 P-GW之间， 因此， 只需要在 P-GW上通过 PCEF进行策略和计费控制； 当釆用 PMIP协议时， 承载是建立 在 UE和 S-GW之间， 因此需要在 S-GW上通过 BBERF功能进行承载绑定， 保证业务流在 S-GW到 UE之间的 QoS, 同时在 P-GW上通过 PCEF功能进 行 QoS和计费控制。 In R8, the S-GW and the P-GW can communicate using either GTP or PMIP protocols. When the GTP protocol is used, the bearer is established between the UE and the P-GW. Therefore, only the PCEF needs to perform policy and charging control on the P-GW. When the PMIP protocol is used, the bearer is established in the UE and Between the S-GWs, it is necessary to perform bearer binding on the S-GW through the BBERF function, to ensure the QoS of the service flow between the S-GW and the UE, and to pass the PCEF function on the P-GW. Line QoS and charging control.
当前， 随着电信产业的并购和重组， 大部分运营商成为了既有固定网络 也有移动网络的全网络运营商。 固定网络和移动网络的融合以及全业务运营 成为各大运营商的重要发展方向。 全业务融合网络将是以 IP承载为主， 能够 提供丰富的话音、 视频和数据等多媒体综合业务， 同时釆用开放、 标准的体 系结构， 为用户提供个性化、 移动化、 宽带化、 多媒体化服务， 因此实现对 用户资源及服务质量（Quality of Service, QoS )策略的统一部署和管理， 同 时保证单个用户 /业务的精细化控制和 QoS将是全业务运营发展的方向。  At present, with the merger and reorganization of the telecommunications industry, most operators have become full network operators with both fixed and mobile networks. The convergence of fixed and mobile networks and full-service operations have become important development directions for major operators. The full-service converged network will be based on IP bearers, providing rich multimedia services such as voice, video and data. At the same time, it will adopt an open, standard architecture to provide users with personalized, mobile, broadband and multimedia. Service, thus achieving unified deployment and management of user resources and Quality of Service (QoS) policies, while ensuring refined control and QoS for individual users/services will be the direction of full-service operation development.
策略和计费控制 （Policy and Charging Control, PCC ) ***处于网络的业 务控制层和承载层之间， 可以为业务层提供 QoS支持和相应的计费控制， 是 运营商实现对业务精细化控制和 QoS保证的重要的运营支撑***。  The Policy and Charging Control (PCC) system is located between the service control layer and the bearer layer of the network, and can provide QoS support and corresponding charging control for the service layer. An important operational support system for QoS assurance.
PCC ***是针对第三代合作伙伴计划 （ 3rd Generation Partnership Project , 3GPP )的无线接入方式建立的。 对于全网络运营商来说， 用户的接 入方式还包括固网接入， 现有技术中没有一种基于 QoS策略统一对固定网络 和移动网络进行计费控制的方法， 从而不能基于业务的 QoS进行计费控制。  The PCC system was established for the wireless access method of the 3rd Generation Partnership Project (3GPP). For the entire network operator, the access mode of the user also includes the fixed network access. In the prior art, there is no method for uniformly controlling the charging of the fixed network and the mobile network based on the QoS policy, so that the service cannot be based on the QoS. Perform billing control.
发明内容 Summary of the invention
本发明提供的在全业务融合网络中控制资源的方法和***， 实现对固定 宽带网络和移动网络统一的 QoS策略控制。  The invention provides a method and system for controlling resources in a full service convergence network, and implements unified QoS policy control for a fixed broadband network and a mobile network.
为达到上述发明目的， 本发明提供了如下技术方案：  In order to achieve the above object, the present invention provides the following technical solutions:
一种在全业务融合网络中控制资源的方法， 包括：  A method of controlling resources in a full service convergence network, including:
策略和计费规则功能（ PCRF )从业务功能（ AF )接收到业务信息后， 进 行接纳控制和策略决策， 并将所述业务的策略下发给策略执行功能（PEF ) 。  After receiving the service information from the service function (AF), the policy and charging rule function (PCRF) performs admission control and policy decision, and sends the policy of the service to the policy execution function (PEF).
上述方法中， PCRF可通过如下方式进行接纳控制： 判断是否有足够的可 用资源； 在确定可用资源充足时， 接纳该业务； 在确定可用资源不充足时， 拒绝该业务。 AF可在如下任一条件下向 PCRF发送该业务的信息： 会话建立 时； 会话过程中， 服务质量策略发生变化时。 服务质量策略发生变化可以是 指： 用户的签约信息发生变化， 和 /或， 运营商配置发生变化。 PCRF可在接纳该业务后向 PEF发送该业务的策略。 PEF可驻留在固定 网络的传输层网元上， 该传输层网元可包括以下网元的一种或多种： 家庭网 关（CNG )、 接入节点（AN )和宽带网络网关（BNG )。 该业务的策略可包 括服务质量（QoS )策略和 /或计费策略。 In the above method, the PCRF may perform admission control by: determining whether there are sufficient resources available; accepting the service when it is determined that the available resources are sufficient; rejecting the service when determining that the available resources are insufficient. The AF may send the information of the service to the PCRF under any of the following conditions: when the session is established; during the session, when the quality of service policy changes. A change in the quality of service policy can mean: the subscriber's subscription information changes, and/or the carrier configuration changes. The PCRF can send the policy of the service to the PEF after accepting the service. The PEF may reside on a transport layer network element of the fixed network, and the transport layer network element may include one or more of the following network elements: a home gateway (CNG), an access node (AN), and a broadband network gateway (BNG). . The policy of the service may include a quality of service (QoS) policy and/or a charging policy.
PCRF可通过通过 Gxx接口向 PEF发送该业务的策略。 本发明还提供一种在全业务融合网络中控制资源的***， 包括 PCRF、 PEF和 AF, 其中， 所述 PCRF设置成在接收到来自 AF的业务的信息后， 进 行接纳控制和策略决策， 并将所述业务的策略下发给策略执行功能（PEF ) ； 所述 PEF设置成接收所述 PCRF下发的策略并执行；  The PCRF can send the policy of the service to the PEF through the Gxx interface. The present invention also provides a system for controlling resources in a full service convergence network, including PCRF, PEF, and AF, wherein the PCRF is configured to perform admission control and policy decision after receiving information from the AF service, and Transmitting the policy of the service to a policy enforcement function (PEF); the PEF is configured to receive the policy delivered by the PCRF and execute the policy;
所述 AF设置成发送业务的信息给 PCRF。  The AF is set to send information of the service to the PCRF.
上述***中， PCRF可包括： 判断模块， 其可设置成判断业务流经过的路 径上可用资源是否充足； 以及， 处理模块， 其可设置成在判断模块确定可用 资源充足时， 接纳该业务； 在判断模块确定可用资源不充足时， 拒绝该业务。 AF可设置成在如下任一条件下发送业务的信息给 PCRF: 会话建立时； 会话 过程中， 服务质量策略发生变化时。 服务质量策略发生变化可以是指： 用户 的签约信息发生变化， 和 /或， 运营商配置发生变化。  In the above system, the PCRF may include: a judging module, which may be configured to determine whether the available resources on the path through which the service flow passes is sufficient; and a processing module, which may be configured to accept the service when the judging module determines that the available resources are sufficient; The judging module rejects the service when it determines that the available resources are insufficient. The AF can be set to send the information of the service to the PCRF under any of the following conditions: When the session is established; During the session, when the quality of service policy changes. A change in the quality of service policy can mean: the subscriber's subscription information changes, and/or the carrier configuration changes.
PCRF可设置成在接纳该业务后， 向 PEF发送该业务的策略。 PEF可驻 留在传输层网元上， 该传输层网元可包括以下网元的一种或多种： CNG、 AN及 BNG。 业务的策略可包括 QoS策略和 /或计费策略。  The PCRF can be set to send the policy of the service to the PEF after accepting the service. The PEF may reside on a transport layer network element, which may include one or more of the following network elements: CNG, AN, and BNG. The policy of the service may include a QoS policy and/or a charging policy.
PCRF可通过 Gxx接口向 PEF发送业务的策略。  The PCRF can send a service policy to the PEF through the Gxx interface.
本发明提供的技术方案，通过对固定宽带网络中资源请求进行接纳控制， 保证已接纳业务流的 QoS, 实现对固定宽带网络和移动网络统一的 QoS策略 控制， 从而达到基于业务的 QoS进行计费控制的目的。  The technical solution provided by the present invention ensures the QoS of the accepted service flow by performing admission control on the resource request in the fixed broadband network, and implements unified QoS policy control for the fixed broadband network and the mobile network, thereby achieving charging based on the service-based QoS. The purpose of control.
附图概述 BRIEF abstract
图 1为现有技术中 EPS***的结构示意图；  1 is a schematic structural view of an EPS system in the prior art;
图 2为现有技术中 PCC***的结构示意图; 图 3为现有技术中固定宽带网络的结构示意图； 2 is a schematic structural diagram of a PCC system in the prior art; 3 is a schematic structural diagram of a fixed broadband network in the prior art;
图 4a为本发明提供的 PCC***的结构示意图；  4a is a schematic structural diagram of a PCC system provided by the present invention;
图 4b为本发明提供的 PCC***的另一结构示意图；  4b is another schematic structural diagram of a PCC system provided by the present invention;
图 5为本发明提供的全业务融合网络的结构示意图；  FIG. 5 is a schematic structural diagram of a full service convergence network provided by the present invention; FIG.
图 6为实施例一提供的在全业务融合网络中接纳控制的方法流程图； 图 7为实施例二提供的在全业务融合网络中接纳控制的方法流程图。  FIG. 6 is a flowchart of a method for admission control in a full service convergence network according to Embodiment 1; FIG. 7 is a flowchart of a method for admission control in a full service convergence network according to Embodiment 2.
本发明的较佳实施方式 Preferred embodiment of the invention
下面结合附图对本发明实施例提供的技术方案作进一步介绍。  The technical solutions provided by the embodiments of the present invention are further described below with reference to the accompanying drawings.
如图 3所示， 在固定宽带网络中宽带接入网络（如 DSL ) 包括用户终端 As shown in Figure 3, a broadband access network (such as DSL) in a fixed broadband network includes user terminals.
UE (如 PC等） 、 接入节点 AN (如 DSLAM ) 、 接入服务器 AS (如 BRAS、 BNG等） 。 AN通过若干起汇聚作用的以太交换机接入到 AS, AS上行接入 城域网， 城域网上行会接入骨干网。 其中 AS是运营商开展业务的关键节点， 与认证服务器（ AAA或 NASS )相连， 用于将接入的 UE的用户名和密码发 往认证服务器进行认证， 并为 UE分配 IP地址。 UE (such as PC, etc.), access node AN (such as DSLAM), access server AS (such as BRAS, BNG, etc.). The AN accesses the AS through a number of Ethernet switches that are converged. The AS accesses the metropolitan area network and the metropolitan area network accesses the backbone network. The AS is a key node for the operator to conduct services, and is connected to the authentication server (AAA or NASS) for sending the username and password of the accessed UE to the authentication server for authentication, and assigning an IP address to the UE.
与移动网络不同的是， UE和接入服务器之间并不会通过建立不同的承载 来区分不同优先级的业务流。为了能够在固网实现基于业务的动态 QoS控制， 本发明提供的 PCC***， 具有如下特点：  Different from the mobile network, the UE and the access server do not distinguish between different priority service flows by establishing different bearers. In order to implement dynamic QoS control based on services in a fixed network, the PCC system provided by the present invention has the following features:
在原有 PCC***的基础上， PCRF根据用户签约、 业务层的协商结果以 及运营商配置制定策略；如果用户是通过固网宽带接入的， PCRF还用于维护 网络拓朴以及资源状况， 为业务提供基于网络资源状况的接纳控制， 并且确 定策略的执行点， 将策略分发给相应的执行点。  On the basis of the original PCC system, the PCRF formulates policies based on the user subscription, the negotiation result of the service layer, and the carrier configuration. If the user accesses the broadband through the fixed network, the PCRF is also used to maintain the network topology and resource status for the service. Provide admission control based on network resource status, and determine the enforcement point of the policy, and distribute the policy to the corresponding execution point.
其中 PCRF可以通过 SPR获得用户的签约信息， SPR可以作为用户数据 集合（User Data Convergence, UDC ) 的前转点 （Front End, FE )部署， 也 可以单独部署（如图 4a所示 )； PCRF也可以通过 NASS和 /或 AAA获得用 户的签约信息， 其中 NASS和 AAA可以单独部署， 也可以合设（如图 4b所 示） 。 PEF (策略执行功能， Policy Enforcement Function ) 实体主要驻留在传输 层网元上， 执行从 PCRF下发的策略。 The PCRF can obtain the subscription information of the user through SPR. The SPR can be deployed as the Front End (FE) of the User Data Convergence (UDC), or can be deployed separately (as shown in Figure 4a); The user's subscription information can be obtained through NASS and/or AAA, where NASS and AAA can be deployed separately or together (as shown in Figure 4b). The PEF (Policy Enforcement Function) entity resides on the transport layer NE and performs the policy delivered from the PCRF.
下面结合具体组网图对本发明的方案进一步说明， 如附图 5所示： 固定宽带网络用户终端通过家庭网关（ Customer Network Gateway, CNG ) 接入运营商网络， 连接到 AN实体（如 DSLAM等）， AN实体通过接入网汇 聚层接入到宽带网络网关 （Broadband Network Gateway, BNG ) 实体， BNG 实体上行接入到城域骨干网 （如果运营商规模较小， 则为骨干网） ， 运营商 提供的 IP业务服务器通常部署在城域骨干网中， 如图 5中数据流路由示意 1 所示。此时 PCRF要将策略下发到固网传输层网元，该传输层网元驻留有 PEF 实体。  The solution of the present invention is further described below in conjunction with a specific networking diagram, as shown in FIG. 5. The fixed broadband network user terminal accesses the carrier network through a Customer Network Gateway (CNG), and is connected to an AN entity (such as a DSLAM, etc.). The AN entity accesses the Broadband Network Gateway (BNG) entity through the access network convergence layer, and the BNG entity uplinks to the metro backbone network (or the backbone network if the carrier is small), the carrier The IP service server is usually deployed in the metro backbone network, as shown in Figure 1 for data flow routing. At this time, the PCRF sends the policy to the fixed network transport layer network element, where the transport layer network element resides in the PEF entity.
其中用户数据还可以通过 AN实体接入分组数据网网关， 从而接入运营商 提供的 IP业务网络， 如图 5中见数据流路由示意 2所示。 此时 PCRF除了要将 策略下发到固网承载层网元上， 还需要将相应的策略下发到分组数据网关。  The user data can also access the packet data network gateway through the AN entity, so as to access the IP service network provided by the operator. As shown in FIG. 5, the data flow route diagram 2 is shown. In this case, in addition to sending the policy to the fixed network bearer layer network element, the PCRF needs to send the corresponding policy to the packet data gateway.
在本发明中， PCRF具有感知和维护固网网络拓朴和资源状况的功能，并 根据固网的网络拓朴和资源状况， 为业务的资源请求提供接纳控制， 同时根 据业务的情况和传输层网元的实际能力， 向相应的传输层网元下发策略， 其 中该传输层网元可以为 CNG、 AN及 BNG中的至少一种。  In the present invention, the PCRF has the function of sensing and maintaining the topology and resource status of the fixed network, and provides admission control for the resource request of the service according to the network topology and resource status of the fixed network, and according to the service situation and the transport layer. The actual capability of the network element sends a policy to the corresponding transport layer network element, where the transport layer network element can be at least one of CNG, AN, and BNG.
本发明中， PCRF通过 Gxx接口向传输网元下发策略。  In the present invention, the PCRF sends a policy to the transport network element through the Gxx interface.
下面结合附图对本发明提供的技术方案进行说明：  The technical solution provided by the present invention will be described below with reference to the accompanying drawings:
实施例一  Embodiment 1
本实施例以用户设备请求传输业务流的应用场景为例进行说明， 具体过 程如图 6所示：  This example is described by using an application scenario in which a user equipment requests to transmit a service flow. The specific process is shown in Figure 6.
步骤 601、UE与业务功能 AF之间进行业务协商，包括确定业务流的 QoS 参数；  Step 601: Perform service negotiation between the UE and the service function AF, including determining a QoS parameter of the service flow.
步骤 602、 AF根据协商好的 QoS参数向 PCRF发起策略控制请求； 步骤 603、 PCRF根据用户的业务签约信息、 运营商的策略和 AF发来的 请求消息中业务控制信息制定策略，其中所述业务签约信息是从 SPR获取的， 其中所述策略包括 QoS策略和 /或计费策略； 步骤 604、 如果用户是从固网接入， PCRF对资源请求进行资源可用性检 查， 即判断业务流经过的路径上是否还有足够的可用资源 （如， 带宽） ， 如 果有， 则接纳用户发起的资源请求， 并执行步骤 605; 如没有， 则拒绝所述 资源请求， 流程结束； Step 602: The AF initiates a policy control request to the PCRF according to the negotiated QoS parameter. Step 603: The PCRF formulates a policy according to the service subscription information of the user, the policy of the operator, and the service control information in the request message sent by the AF, where the service is The subscription information is obtained from the SPR, where the policy includes a QoS policy and/or a charging policy; Step 604: If the user accesses from the fixed network, the PCRF performs a resource availability check on the resource request, that is, determines whether there are enough available resources (such as bandwidth) on the path through which the service flow passes, and if so, accepts the user initiated Resource request, and step 605 is performed; if not, the resource request is rejected, and the process ends;
步骤 605、 PCRF向传输层网元下发策略，其中所述策略包括 QoS策略和 Step 605: The PCRF sends a policy to the transport layer network element, where the policy includes a QoS policy and
/或计费策略； / or billing strategy;
如果所述用户通过 BNG实体接入 IP业务服务器， 则 PCRF向固网传输 层网元下发策略， 如果用户通过分组数据网元接入 IP业务服务器， 则 PCRF 向固网承载层网元和分组数据网元下发策略。  If the user accesses the IP service server through the BNG entity, the PCRF sends a policy to the fixed network transport layer network element. If the user accesses the IP service server through the packet data network element, the PCRF sends the network element and the packet to the fixed network bearer layer. The data network element issues a policy.
步骤 606、 传输层网元执行所述策略， 根据策略内容对业务流进行管理， 包括标记 QoS优先级、 限制带宽等。  Step 606: The transport layer network element executes the policy, and manages the service flow according to the policy content, including marking a QoS priority, limiting a bandwidth, and the like.
实施例二  Embodiment 2
本发明实施例以 Qos策略发生变化的常见应用为例进行说明， 具体过程 如图 7所示：  The common application of the QoS policy changes is taken as an example in the embodiment of the present invention. The specific process is as shown in FIG. 7:
步骤 701、 在会话过程中， PCRF受到内部或外部的触发（例如： 用户的 签约信息发生变化； 运营商配置发生变化） ， 对用户的 QoS策略进行修改； 步骤 702、 如果该用户是从固网接入的， PCRF对资源更新进行资源可用 性检查， 判断该用户的业务流经过的路径上是否有足够的资源保证更新的执 行， 如果有， 接纳该资源更新请求， 并执行步骤 703; 如没有， 则拒绝该资 源更新请求， 流程结束。  Step 701: During the session, the PCRF is internally or externally triggered (for example, the subscription information of the user changes; the configuration of the carrier changes), and the QoS policy of the user is modified. Step 702: If the user is from the fixed network The access, the PCRF performs a resource availability check on the resource update, determines whether there is sufficient resources on the path through which the user's service flow passes to ensure the execution of the update, and if so, accepts the resource update request, and performs step 703; if not, The resource update request is rejected and the process ends.
步骤 703、 PCRF向相应的传输层网元下发更新的策略， 其中所述策略包 括 QoS策略和 /或计费策略。  Step 703: The PCRF sends an updated policy to the corresponding transport layer network element, where the policy includes a QoS policy and/or a charging policy.
步骤 704、 传输层网元执行更新策略， 根据策略内容对业务流进行管理， 包括标记 QoS优先级、 限制带宽等。  Step 704: The transport layer network element performs an update policy, and manages the service flow according to the policy content, including marking a QoS priority, limiting a bandwidth, and the like.
下面以图 3所示固定宽带网络为例进行说明：  The following is an example of a fixed broadband network as shown in Figure 3:
PCRF 维护记录有网络拓朴与资源状况列表， 其中路径 al、 a2、 a3、 a4 的带宽上下行均为 10M, 路径 bl、 b2的上下行带宽为 15M。  The PCRF maintains a list of network topology and resource status. The bandwidth of the paths al, a2, a3, and a4 is 10M, and the upstream and downstream bandwidths of the paths bl and b2 are 15M.
固定宽带网络中 UE1 向城域网中某服务器发起一个需要 QoS保证的业 务， 需要 10M上下行带宽； PCRF进行资源可用性检查， 接纳了该资源请求， 为 UE1分配路径 al； 此时， PCRF中维护的拓朴与资源状况需要进行更新， 路径 al剩余的上下行为 0M, 路径 bl剩余的上下行带宽为 5M。 In a fixed broadband network, UE1 initiates a service that requires QoS guarantee to a server in the metropolitan area network. The 10F uplink and downlink bandwidth is required. The PCRF performs the resource availability check and accepts the resource request to allocate the path a1 to the UE1. At this time, the topology and resource status maintained in the PCRF need to be updated, and the remaining upper and lower behaviors of the path a1 are 0M. The remaining uplink and downlink bandwidth of the path bl is 5M.
进一步地， 为保证该业务的流量在经过的设备中能够优先被转发， 不会 受到其他流量的冲击。 PCRF需要向其他网元下发 QoS策略， 其中在向 AN 点下发的 QoS策略中，对该业务流的上行流量打上高优先级 QoS标记； 在向 城域网中该服务器的出口路由器下发的 QoS策略中， 对该业务流的下行流量 打上高优先级 QoS标记。  Further, in order to ensure that the traffic of the service can be preferentially forwarded in the passing device, it is not affected by other traffic. The PCRF needs to deliver a QoS policy to other network elements. In the QoS policy delivered to the AN, the upstream traffic of the service flow is marked with a high priority QoS flag; and is sent to the egress router of the server in the metropolitan area network. In the QoS policy, the downstream traffic of the traffic flow is marked with a high priority QoS.
进一步地， PCRF还需要向 AN点发送 UE1的计费策略。  Further, the PCRF also needs to send the charging policy of UE1 to the AN point.
如果该固定宽带网络中 UE2再发起一个上下行带宽为 10M的需要 QoS 保证的业务， 此时， PCRF根据本地维护的网络拓朴与资源状况列表， 确定路 径 a2上的可用带宽为 10M,但是路径 bl上的剩余可用带宽只有 5M,没有足 够的资源用于 UE2业务流的传输， 则 PCRF拒绝 UE2的资源请求，保证已接 纳业务流（即 UE1的业务流） 的传输不会受到冲击。  If the UE2 in the fixed broadband network re-initiates a QoS-guaranteed service with an uplink and downlink bandwidth of 10M, the PCRF determines that the available bandwidth on the path a2 is 10M according to the locally maintained network topology and resource status list. The remaining available bandwidth on the bl is only 5M, and there is not enough resources for the transmission of the UE2 service flow. The PCRF rejects the resource request of the UE2, and ensures that the transmission of the admitted service flow (ie, the service flow of the UE1) is not affected.
当检测到 UE1释放占用的带宽后， PCRF更新本地维护的网络拓朴与资 源状况列表， 此次更新后路径 bl的可用带宽为 15M, 则 PCRF接纳 UE2的 资源请求。  After detecting the release of the occupied bandwidth by the UE1, the PCRF updates the locally maintained network topology and the resource status list. After the update, the available bandwidth of the path bl is 15M, and the PCRF accepts the resource request of the UE2.
本发明还提供一种在全业务融合网络中控制资源的***， 包括 PCRF、 PEF和 AF, 其中， PCRF设置成在接收到来自 AF的业务的信息后， 进行接 纳控制和策略决策， 并将所述业务的策略下发给策略执行功能（PEF )； PEF 设置成接收所述 PCRF 下发的策略并执行； AF设置成发送业务的信息给 PCRF。  The present invention also provides a system for controlling resources in a full service convergence network, including PCRF, PEF, and AF, wherein the PCRF is configured to perform admission control and policy decision after receiving information from the AF service, and The policy of the service is sent to the policy enforcement function (PEF); the PEF is set to receive the policy delivered by the PCRF and executed; and the AF is set to send the information of the service to the PCRF.
上述***中， PCRF可包括： 判断模块， 其可设置成判断业务流经过的路 径上可用资源是否充足； 以及， 处理模块， 其可设置成： 在判断模块确定可 用资源充足时， 接纳该业务； 在判断模块确定可用资源不充足时， 拒绝该业 务。 AF可设置成在如下任一条件下发送业务的信息给 PCRF: 会话建立时； 会话过程中， 服务质量策略发生变化时。 服务质量策略发生变化可以是指： 用户的签约信息发生变化， 和 /或， 运营商配置发生变化。 PCRF可设置成在接纳该业务后， 向 PEF发送该业务的策略。 PEF可驻 留在传输层网元上， 该传输层网元可包括以下网元的一种或多种： CNG、 AN及 BNG。 业务的策略可包括 QoS策略和 /或计费策略。 In the above system, the PCRF may include: a judging module, which may be configured to determine whether the available resources on the path through which the service flow passes is sufficient; and a processing module, which may be configured to: when the judging module determines that the available resources are sufficient, accept the service; When the judging module determines that the available resources are insufficient, the service is rejected. The AF can be set to send the information of the service to the PCRF under any of the following conditions: When the session is established; During the session, when the quality of service policy changes. A change in the quality of service policy can mean: the subscriber's subscription information changes, and/or the carrier configuration changes. The PCRF can be set to send the policy of the service to the PEF after accepting the service. The PEF may reside on a transport layer network element, which may include one or more of the following network elements: CNG, AN, and BNG. The policy of the service may include a QoS policy and/or a charging policy.
PCRF可通过 Gxx接口向 PEF发送业务的策略。  The PCRF can send a service policy to the PEF through the Gxx interface.
本发明提供的技术方案，通过对固定宽带网络中资源请求进行接纳控制， 保证已接纳业务流传输的 QoS, 实现对固定宽带网络和移动网络统一的 QoS 策略控制， 从而达到基于业务的 QoS进行计费控制的目的。  The technical solution provided by the present invention ensures the QoS of the service flow transmission by accepting the admission control of the resource request in the fixed broadband network, and realizes the unified QoS policy control of the fixed broadband network and the mobile network, thereby achieving the service-based QoS. The purpose of fee control.
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤是可以 通过程序来指令相关的硬件完成， 所述的程序可以存储于一种计算机可读存 储介质中， 该程序在执行时， 包括方法实施例的步骤之一或其组合。  A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, when executed, including One or a combination of the steps of the method embodiments.
另外， 在本发明各个实施例中的各功能单元可以釆用硬件的形式实现， 也可以釆用软件功能模块的形式实现。 所述集成的模块如果以软件功能模块 的形式实现并作为独立的产品销售或使用时， 也可以存储在一个计算机可读 取存储介质中。  In addition, each functional unit in each embodiment of the present invention may be implemented in the form of hardware, or may be implemented in the form of a software functional module. The integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.
上述提到的存储介质可以是只读存储器， 磁盘或光盘等。  The above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局限 于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易 想到变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护 范围应以权利要求所述的保护范围为准。  The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.
工业实用性 Industrial applicability
与现有技术相比， 本发明通过对固定宽带网络中的资源请求进行接纳控 制， 保证已接纳业务流的 QoS, 实现对固定宽带网络和移动网络统一的 QoS 策略控制， 从而达到基于业务的 QoS进行计费控制的目的。  Compared with the prior art, the present invention ensures admission of service flows by ensuring admission control of resource requests in a fixed broadband network, and implements unified QoS policy control for fixed broadband networks and mobile networks, thereby achieving service-based QoS. The purpose of charging control.

Claims

权 利 要 求 书 Claim
1、 一种在全业务融合网络中控制资源的方法， 包括：  1. A method of controlling resources in a full service convergence network, comprising:
策略和计费规则功能 PCRF从业务功能 AF接收到业务的信息后， 进行 接纳控制和策略决策， 并将所述业务的策略下发给策略执行功能 PEF。  Policy and charging rule function After receiving the information of the service from the service function AF, the PCRF performs admission control and policy decision, and sends the policy of the service to the policy execution function PEF.
2、 根据权利要求 1所述的方法， 其中， 所述 PCRF通过如下方式进行接 纳控制：  2. The method according to claim 1, wherein the PCRF performs the admission control by:
判断是否有足够的可用资源；  Determine if there are enough resources available;
在确定可用资源充足时， 接纳所述业务； 在确定可用资源不充足时， 拒 绝所述业务。  The service is admitted when it is determined that the available resources are sufficient; when the available resources are determined to be insufficient, the service is rejected.
3、 根据权利要求 2所述的方法， 还包括： 所述 AF在如下任一条件下向 3. The method according to claim 2, further comprising: said AF being under any of the following conditions
PCRF发送所述业务的信息： The PCRF sends the information of the service:
会话建立时；  When the session is established;
会话过程中， 服务质量策略发生变化时。  During the session, when the quality of service policy changes.
4、 根据权利要求 3所述的方法， 其中， 服务质量策略发生变化是指： 用 户的签约信息发生变化， 和 /或， 运营商配置发生变化。  4. The method according to claim 3, wherein the change of the quality of service policy means: the subscription information of the user changes, and/or the configuration of the operator changes.
5、 根据权利要求 1至 4任一所述的方法， 其中，  5. The method according to any one of claims 1 to 4, wherein
所述 PCRF是在接纳所述业务后， 向所述 PEF下发所述业务的策略。 The PCRF is a policy for delivering the service to the PEF after receiving the service.
6、根据权利要求 5所述的方法， 其中， 所述 PEF驻留在固定网络的传输 层网元上， 所述传输层网元包括以下网元的一种或多种： 家庭网关 CNG、 接 入节点 AN及宽带网络网关 BNG。 The method according to claim 5, wherein the PEF resides on a transport layer network element of a fixed network, and the transport layer network element includes one or more of the following network elements: a home gateway CNG, Incoming node AN and broadband network gateway BNG.
7、 根据权利要求 6 所述的方法， 其中， 所述业务的策略包括服务质量 QoS策略和 /或计费策略。  7. The method according to claim 6, wherein the policy of the service comprises a quality of service QoS policy and/or a charging policy.
8、 根据权利要求 6或 7所述的方法， 其中，  8. The method according to claim 6 or 7, wherein
向所述 PEF下发所述业务的策略的步骤中， 所述 PCRF是通过 Gxx接口 将所述业务的策略下发给所述 PEF。  In the step of the policy of the service to be sent to the PEF, the PCRF sends a policy of the service to the PEF through a Gxx interface.
9、 一种在全业务融合网络中控制资源的***， 包括策略和计费规则功能 PCRF, 策略执行功能 PEF和业务功能 AF, 其中， 所述 PCRF设置成在接收到来自 AF的业务的信息后， 进行接纳控制和 策略决策， 并将所述业务的策略下发给所述 PEF; A system for controlling resources in a full-service convergence network, comprising a policy and charging rule function PCRF, a policy execution function PEF, and a service function AF, wherein The PCRF is configured to perform admission control and policy decision after receiving the information of the service from the AF, and send the policy of the service to the PEF;
所述 PEF设置成接收所述 PCRF下发的策略并执行；  The PEF is configured to receive the policy delivered by the PCRF and execute the policy;
所述 AF设置成发送业务的信息给所述 PCRF。  The AF is configured to send information of the service to the PCRF.
10、 根据权利要求 9所述的***， 其中， 所述 PCRF包括：  10. The system according to claim 9, wherein the PCRF comprises:
判断模块，其设置成判断业务流经过的路径上可用资源是否充足；以及， 处理模块，其设置成在所述判断模块确定可用资源充足时，接纳所述业 务； 以及， 在所述判断模块确定可用资源不充足时， 拒绝所述业务。  a judging module, configured to determine whether the available resources on the path through which the service flow passes is sufficient; and a processing module configured to accept the service when the judging module determines that the available resources are sufficient; and, determine, by the determining module When the available resources are insufficient, the business is rejected.
11、 根据权利要求 10所述的***， 其中， 所述 AF是设置成在如下任一 条件下发送业务的信息给所述 PCRF:  11. The system according to claim 10, wherein the AF is information that is set to transmit a service under any of the following conditions to the PCRF:
会话建立时；  When the session is established;
会话过程中， 服务质量策略发生变化时。  During the session, when the quality of service policy changes.
12、 根据权利要求 11所述的***， 其中， 服务质量策略发生变化是指： 用户的签约信息发生变化， 和 /或， 运营商配置发生变化。  12. The system according to claim 11, wherein the change of the quality of service policy means: the subscription information of the user changes, and/or the configuration of the operator changes.
13、 根据权利要求 9至 12任一所述的***， 其中，  13. The system according to any one of claims 9 to 12, wherein
所述 PCRF是设置成在接纳所述业务后，将所述业务的策略下发给所述 PEF, 所述业务的策略包括 QoS策略和 /或计费策略。  The PCRF is configured to send the policy of the service to the PEF after the service is accepted, and the policy of the service includes a QoS policy and/or a charging policy.
14、根据权利要求 13所述的***，其中，所述 PEF驻留在传输层网元上， 所述传输层网元包括以下网元的一种或多种： 家庭网关 CNG、接入节点 AN 和宽带网络网关 BNG。  14. The system of claim 13, wherein the PEF resides on a transport layer network element, the transport layer network element comprising one or more of the following network elements: a home gateway CNG, an access node AN And broadband network gateway BNG.
15、 根据权利要求 14所述的***， 其中， 所述 PCRF是设置成  15. The system according to claim 14, wherein the PCRF is set to
通过 Gxx接口将所述业务的策略下发给所述 PEF。  The policy of the service is delivered to the PEF through the Gxx interface.
PCT/CN2010/078871 2010-01-25 2010-11-18 Method and system for controlling resources in full-service convergence network WO2011088702A1 (en)

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