WO2010097015A1 - 一种控制本地交换的方法及*** - Google Patents
一种控制本地交换的方法及*** Download PDFInfo
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- WO2010097015A1 WO2010097015A1 PCT/CN2010/070058 CN2010070058W WO2010097015A1 WO 2010097015 A1 WO2010097015 A1 WO 2010097015A1 CN 2010070058 W CN2010070058 W CN 2010070058W WO 2010097015 A1 WO2010097015 A1 WO 2010097015A1
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- H—ELECTRICITY
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- the present invention claims to be submitted to the Chinese Patent Office on February 26, 2009, and the application number is 200910105674. 7. The invention is entitled "A Method and System for Controlling Local Exchange”. Priority is hereby incorporated by reference in its entirety.
- TECHNICAL FIELD The present invention relates to network communication technologies, and more particularly to a method and system for controlling local switching in a network communication process.
- BACKGROUND OF THE INVENTION In a communication network, in order to improve the user experience and reduce resource waste, local switching technology is usually adopted. That is, when there is overlap between the uplink and the downlink of the communication path, data forwarding is performed at the network element closest to the communication node, thereby reducing waste of the bearer resources on the network side.
- ASN GW1 sends the data packet to the CSN (connection service network), and then the data packet is sent to the MS2 by the CSN network.
- ASN GW2 forwards the data packet to the MS2; if the ASN GW1 and the ASN GW2 are the same network element, the forwarding at the ASN GW1 can be simplified, that is, the ASN GW1 finds the target after receiving the data packet of the MS1.
- the address (MS2) is within its own coverage, the data packet is forwarded directly to the MS2, and finally sent to the MS2. This operation of locally switching the data is a typical way of local exchange.
- the network element performing local switching can determine whether it can perform local switching.
- the network element performing local switching can only be a data plane network element, for example: DPF (DataPath Function, data in WIMAX network)
- the channel function is the BS (Base Station), the ASN GW (Access Service Gateway), and the FA (Policy Function). Therefore, the signaling plane network element, such as: PCRF (Policy Charging Rule Function, Strategy)
- PCRF Policy Charging Rule Function, Strategy
- Embodiments of the present invention provide a method and system for controlling local switching such that a signaling plane network element can control local switching in a communication network.
- a method of local exchange including:
- a method of controlling local exchange including:
- the local exchange LS decision point receives the first LS indication from the subscription database
- the LS decision point Determining, by the LS, the local LS, according to the first LS indication and the local policy; if the local exchange is allowed, the LS decision point sends a second LS indication to the LS control point; otherwise, the local LS is not performed. exchange.
- An LS decision point including:
- a receiving module configured to receive a first LS indication from a subscription database
- the judging module is configured to determine, according to the first LS indication and the local policy, whether the local exchange is allowed.
- the sending module is configured to send a second LS indication to the LS control point when the judging module determines that the local exchange is allowed.
- a system for controlling local exchange comprising: an LS decision point, a contract database;
- the subscription database is configured to send a first LS indication to the LS decision point
- the LS decision point is configured to receive a first LS indication from the subscription database; determine, according to the first LS indication and the local policy, whether to allow local exchange; if local exchange is allowed, send the LS control point Two LS indications; otherwise, no local exchange is performed.
- the method and system for controlling local switching in the embodiment of the present invention implement the control of the local area exchange of the signaling plane network element, which facilitates the control of the local exchange by different network operators.
- Figure 1 is a schematic diagram of a service flow transmission path in a WIMAX communication system
- FIG. 2 is a flowchart of a method for controlling local exchange according to an embodiment of the present invention
- FIG. 3 is a flowchart of a method for controlling local exchange according to an embodiment of the present invention.
- FIG. 5 is a flowchart of a method for controlling local exchange according to Embodiment 3 of the present invention
- 6 is a flowchart of a method for controlling local exchange according to Embodiment 4 of the present invention
- FIG. 7 is a flowchart of a method for controlling local exchange according to Embodiment 5 of the present invention.
- FIG. 8 is a schematic diagram of an apparatus for controlling local switching according to an embodiment of the present invention.
- the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
- the service data transmission path in the WiMAX network is shown in Figure 1.
- the main network elements include:
- ASN access service network, including BS and ASN GW;
- CSN connected to the service network, including network elements such as AAA and HA;
- BS base station, providing air interface connection
- ASN GW access service network gateway, providing data aggregation and signaling relay functions
- HA Home Agent
- Home agent home agent
- MIP Mobile IP
- PF Policy Function
- policy function responsible for user-based policy decision function
- ASN ASN or CSN. If it is located in the ASN, the ASN GW where the Authenticator and the Anchor Service Flow Authorization are located is called Local PF. If it is located in the CSN, it is a separate network. Meta, or located in the AAA server. In the scenario where the PCC (Policy Charging Control) system is deployed on the network, the PF is replaced by the Policy Charging Rule Function (PCRF) and is located in the CSN.
- PCC Policy Charging Control
- AAA Server Authentication Authorization Accounting Server
- AAA proxy server AAA proxy server
- the service data channel of the WiMAX system includes the air interface bearer of the R1 interface (between the MS and the BS), the data path of the R6 interface (between the BS and the ASN GW), and the R4 interface (between the ASN GWs) and the R3 interface (the ASN GW and the HA). MIP tunnel.
- the general data channel is shown by the thick line in Figure 1. When the entire data channel partially overlaps, or the data repeatedly passes through the same network element, the data can be locally exchanged in the network element. When there are multiple network elements that can be locally switched, in order to achieve the best effect, the network element closest to the communication node is usually selected for local exchange.
- the system for controlling LS (Local Switching) provided by this embodiment, as shown in FIG.
- a subscription database which is used to store user service subscription data, and may be located in an AAA server or a SPR (Subscription Profile Repository, user). Sign up on the database).
- a first LS indication may be added to the user service subscription data, and used to indicate that the related service flow is locally exchanged.
- the LS indication here is the local exchange policy saved in the subscription database.
- the LS decision point is used to determine whether the local LS is allowed to be exchanged according to the first LS indication from the subscription database. If yes, the second LS indication is sent to the LS control point; otherwise, the local exchange is not performed. It can be located on the signaling plane network element, for example: PF, Local PF (local PF), or PCRF.
- the LS control point is configured to determine whether to perform local exchange according to the second LS indication from the LS decision point, or directly notify the relevant network element to perform local exchange according to the second LS. It is usually located on the data plane network element, for example: on the ASN GW or BS.
- the first LS indication can be divided into the following categories: user-based, terminal-based, service-based, service flow-based, location-based, or a combination of the above.
- the first LS indication based on the user applies to all service flows for that user.
- the first LS based terminal indicates all service flows applicable to the terminal.
- the service-based LS indication applies to all service flows included in the service.
- the service flow based LS indication applies to the service flow.
- the location-based first LS indicates a network element applicable to the specified location, which may be an ASN GW or a BS, indicating that the network element is allowed to perform local exchange for all service flows that can be locally exchanged.
- the first LS indication may be an LS indication based on the user + terminal, meaning that when the user uses the terminal, all service flows allow local exchange.
- the LS indication based on the user/terminal/service/service flow+location means that the designated network element is allowed to perform local exchange on the qualified service flow, for example, based on the LS indication of the user+location, that is, the network element that allows the specified location to The user's service flow performs a local exchange.
- the local exchange LS decision point receives the first LS indication from the subscription database
- the LS decision point determines whether local exchange is allowed according to the first LS indication and the local policy. Where: if the local policy allows the local exchange type in the first LS indication, local exchange is allowed; if the local policy is not If the local exchange type in the first LS indication is allowed, the local exchange is not allowed; the LS decision point is located on the signaling plane network element.
- Embodiment 1 A method for controlling local exchange according to an embodiment of the present invention refers to FIG. 3, including:
- the subscription database sends a first LS indication to the LS decision point, where: when a trigger condition occurs, the subscription database sends a first LS indication to the LS decision point, where the indication is a local exchange policy saved in the subscription database. , can be included in the user service subscription information.
- the present invention does not limit the specific form of the LS indication. Only two possible forms are given here: 1.
- a composite parameter is used to represent the local switching policy, that is, the LS indicating parameter includes two parts, and the former part is used to indicate local switching. Type, used to distinguish between local exchange based on service flow, user-based, terminal-based, service-based, location-based, or a combination thereof.
- the latter part is used to represent objects that are allowed to be exchanged locally, such as service flow identifier, user ID, and terminal identifier. , business identification, location information, or a combination thereof. 2, as a separate parameter, when it is together with other parameters, it is combined to represent the local exchange policy, for example: Put the LS indicator in the SF Info parameter to indicate that the service flow is allowed to be exchanged locally, placed
- the user profile indicates that all service flows of the user or terminal are allowed to be exchanged locally, placed in the service description information to indicate that the service flow of the service is allowed to be exchanged locally, or combined with the location information to indicate that location-based local exchange is allowed.
- the subscription database receives the request message of the LS decision point, the user service subscription information in the subscription database changes, or the operator changes the LS policy.
- the LS decision point performs an LS decision according to the first LS indication from the subscription database.
- the LS decision point After receiving the first LS indication, the LS decision point determines whether local exchange is allowed. Determining whether to allow local exchange can be performed according to the first LS indication and the local policy of the LS decision point.
- the local policy of the LS decision point mentioned here refers to the local exchange-related policy stored in the LS decision point. It can pre-configure the local exchange policy at the LS decision point and the LS decision point obtained from the ASN.
- the first LS indication in step 301 is indicated.
- the local exchange type, the LS decision made here is the same as the local exchange policy sent by the subscription database in step 301; for example: when the LS indication sent by the subscription database allows the current service flow to be locally exchanged, the LS decision point makes a judgment permit The current service flow is exchanged locally.
- the decision made here is that local exchange is not allowed.
- the local exchange policy provided by the contract database is to allow some type of local exchange, but the LS decision point has previously learned that the current network's billing point is located in the CSN (for example, HA), and all service flows must be counted. The fee, therefore, all service flows must be collected by the CSN to complete the charging information.
- the LS decision point makes a judgment that local exchange is not allowed, and the subsequent process no longer involves local exchange.
- the local policy of the LS decision point does not allow the local exchange type indicated by the first LS indication in step 301, but allows the LS to indicate a smaller local exchange type, such as: part of the service flow or terminal part of the user is allowed.
- the service flow is locally exchanged, and the LS decision made here is different from the local exchange policy sent by the subscription database in step 301, and only part of the service flow in the first LS indication is allowed to be locally exchanged; for example, the local exchange policy provided by the subscription database
- the current user is allowed to perform local exchange, but the LS decision point has previously learned that some service flows of the user must be legally monitored by the back-end network element, so the monitored service flows cannot be locally exchanged, and the LS decision is made. The point is judged to allow only the user to perform local exchange of service flows other than the service flow that the part is legally intercepted.
- the LS decision point sends a second LS indication to the LS control point, indicating that the LS decision point allows some type of local exchange; if the LS decision point only allows part of the service flow to be localized If the LS decision point is sent to the LS control point, the second LS indication indicates that part of the service flow is allowed to be locally exchanged.
- the LS control point determines whether to perform local exchange according to the second LS indication from the LS decision point and the LS control point local policy. If yes, notify the data plane network element responsible for performing the local exchange to perform local exchange. Otherwise, the related art related processes are executed and will not be described again.
- the LS control point notifies, according to the second LS indication, that the data plane network element responsible for performing the local exchange performs local exchange.
- the local policy of the LS control point mentioned here refers to the local exchange related policy saved by the LS control point, including but not limited to the carrier pre-configured local switching policy, the user terminal service flow context maintained by the LS control point, charging or QoS control strategy, etc.
- the subscription database is located on the AAA server, and the LS decision point and the LS control point are located on the ASN GW where the Anchor Service Flow Authorization (Anchor Service Flow Authorization) is located.
- the ASN GW is also the network element where the Local PF for dynamic QoS control resides.
- the method for local switching in the embodiment of the present invention includes: 401.
- the AAA server sends an Access Accept message to the Authent icator (authenticator) and the ASN GW where the Anchor SFA is located.
- the message carries the LS indication; the LS indication may be carried in the user subscription information of the Access Accept message.
- the AAA server sends a CoA Request (Change Of Authorization Request) message to the ASN GW, where the message carries the LS indication; the LS indication can carry the updated user subscription in the CoA Request message.
- the ASN GW may return a CoA Response message to the AAA server as a response.
- the ASN GW saves the received user subscription information. Then, the ASN GW determines whether to allow local exchange according to the LS indication and the local policy. If local exchange is not performed, the pre-provi s ion service flow establishment process is initiated according to the prior art (if the access to the U is Access) Accept message), or the service flow (including the preset flow and the established dynamic service flow) establishment/modification/deletion process (if a CoA message is received); if it is decided to perform local exchange, initiate a local exchange preset flow Establish a process, or initiate a local exchange of service flows (including preset flows and established dynamic service flows) to establish/modify/delete processes. If it is decided to allow partial service flows for local exchange, a locally exchanged preset flow establishment process is initiated for a portion of the service flows that are allowed to be locally exchanged, or a locally exchanged service flow establishment/modification/deletion process is initiated.
- This embodiment is also applicable to a dynamic service flow establishment/modification process initiated by a terminal in a Dynamic QoS scenario.
- Step 402 The MS can request the establishment/modification of the dynamic service flow at any time.
- the ASN GW receives the service flow establishment or modification of the MS,
- the flow establishes or modifies the response such that the data plane network element performs local exchange of service flow establishment or modification; if partial service flow is allowed for local exchange, the LS indication indicates that partial service flow is allowed for local exchange.
- Embodiment 3 Embodiment 3
- the subscription database is located on the AAA server, and the LS decision point is located on the PCRF or PF.
- the LS control point is located on the ASN GW where the access service network policy charging execution function A-PCEF or Anchor SFA is located.
- the method for local exchange in the embodiment of the present invention refers to FIG. 5, and includes:
- the step is similar to the step 401 in the second embodiment.
- the ASN GW receives an Access Accept message or a CoA Request message from the AAA server, where the first LS indication is carried, and details are not described herein.
- the ASN GW sends an authorization request to the PCRF/PF. Specifically, if it is a PCC scenario, the ASN GW sends an IP CAN Session Establishment Request message to the PCRF, where the request message may be a CCR (Credit Control Request) message of the DIAMETER protocol, and the message carries the message received in step 501.
- the first LS indication Or, at any time after step 501, the ASN GW needs to initiate an IP CAN Session modification, or receives an IP CAN Bear signaling, such as an RR Request message, for requesting an IP CAN Session modification, and the ASN GW sends an IP CAN Session to the PCRF.
- the request message may use the CCR message of the DIAMETER protocol, and the message carries the LS indication received in step 501.
- the message between the ASN GW and the PCRF may need to be forwarded through a PDF (Policy Distribution Function). This is the case after the interaction between the PCRF and the ASN GW. If it is a PF scenario, the ijASN GW sends an SFA LU (Service Flow Authorization Location Update) request message or a RR Request (Resource Reservation Request) message to the PF, and the message carries step 501.
- SFA LU Service Flow Authorization Location Update
- RR Request Resource Reservation Request
- the PCRF/PF determines, according to the first LS indication and the local policy, whether to allow local exchange, and then returns an authorization response. Specifically:
- the PCRF returns an IP CAN Session establishment response or an IP CAN Session modification response to the ASN GW, and the response message may use a CCA (Credit Control Answer) message of the DIAMETER protocol.
- CCA Current Control Answer
- the message has a second LS indication; if a part of the service flow is allowed to perform local exchange, the second LS indication carried in the message indicates that part of the service flow is allowed to be locally exchanged; if not, the message is not The second LS indicates that the related process of the prior art is performed.
- the PF sends an RR request message (as a response to the SFA LU message) or an RR response message (as a response to the RR request) to the ASN GW.
- the message has a second LS indication. If a part of the service flow is allowed to be locally exchanged, the second LS indication carried in the message indicates that part of the service flow is allowed to be locally exchanged; if not, the second LS indication is not included in the message, and the related process of the prior art is performed.
- the ASN GW After receiving the second LS indication from the PCRF/PF, the ASN GW determines whether to perform local exchange, and if yes, Then, the RR request with the second LS indication is sent to the ASN GW where the Anchor DPF (Anchor Data Path Function) is located to initiate the bearer establishment for the local exchange; or the LS is sent to the ASN GW where the Anchor DPF is located.
- the indicated IP CAN Bear signaling response such as RR response, is used to confirm bearer setup for local switching.
- the RR request is sent to the ASN GW where the Anchor DPF is located, and the bearer establishment process is initiated; or the RR response is sent to the ASN GW where the Anchor DPF is located as the response of the IP CAN Bear signaling according to the prior art.
- Embodiment 4
- the subscription database is located in the SPR
- the LS decision point is located in the PCRF
- the LS control point is located in the ASN GW where the A-PCEF is located. Suitable for PCC scenes.
- the method for locally switching in the embodiment of the present invention refers to FIG. 6, including:
- the ASN GW sends an authorization request to the PCRF. Specifically:
- the ASN GW sends an IP CAN Session establishment request to the PCRF, and the request message can use the CCR (Cash Control Request) message of the DIAMETER protocol.
- the ASN GW needs to initiate IP CAN Session modification, or receives IP CAN Bear signaling, such as an RR Request message, for requesting IP CAN Session modification, and the ASN GW sends an IP CAN Session modification request to the PCRF, requesting a message.
- the message between the ASN GW and the PCRF may need to be forwarded through a PDF (Poly icy Di stribution Functification).
- the PCRF obtains user subscription information from the SPR, where the first LS indication is included. After the step 601 is triggered, the PCRF sends a request message to the SPR, and the SPR sends the user subscription information to the PCRF. This step may also be independent of step 601. If it occurs before or at the same time as step 601, the SPR actively sends the user subscription information to the PCRF.
- the PCRF determines whether local exchange is allowed, and then returns an authorization response. Specifically:
- the PCRF returns an IP CAN Session establishment response or an IP CAN Session modification response to the ASN GW, and the response message uses a CCA (Credit Control Answer) message of the DIAMETER protocol. If the PCRF allows local exchange, the message carries a second LS indication. If partial service flows are allowed to be locally exchanged, the second LS indication carried in the message indicates that part of the service flows are allowed to be locally exchanged; 604. After receiving the second LS indication from the PCRF, the ASN GW determines whether to perform local exchange, and if yes, sends an RR with the second LS indication to the ASN GW where the Anchor DPF (Anchor Datapath Function) is located.
- the Anchor DPF Anchor Datapath Function
- the SPR may be a logical function, which may be located in the AAA server.
- the PCRF shall obtain the user subscription information from the AAA server, where the first LS indication is included.
- the LS control point is located in the PCRF, and the LS control point is located in the ASN GW where the A-PCEF is located. The method is applicable to the PCC scenario.
- the subscription database is located in the SPR.
- the PCRF obtains user subscription information from the SPR, where the first LS indication is included.
- the PCRF may make an internal decision or receive a service establishment request from the AF.
- the PCRF requests the user to sign the subscription information to the SPR, and then the SPR sends the user subscription information to the PCRF.
- the SPR may also send the user subscription information to the PCRF.
- the PCRF determines whether the local exchange is allowed. If allowed, sends an IP CAN Session modification request to the ASN GW.
- the request uses a RAR (Re-Authorization Request) message of the DIAMETER protocol, and the message has a second LS indication. . If a partial service flow is allowed to be locally exchanged, the second LS indication carried in the message indicates that part of the service flow is allowed to be locally exchanged; 703, the ASN GW determines whether to perform local exchange, and if so, initiates local exchange bearer establishment. Otherwise, the bearer setup is initiated according to the prior art.
- RAR Re-Authorization Request
- the ASN GW returns an IP CAN Session modification response to the PCRF, where the response uses a RAA (Re-Authorization Answer) message of the DIAMETER protocol.
- the SPR may be a logical function, which is located in the AAA server.
- the PCRF shall obtain the user subscription information from the AAA server, including the LS indication.
- An embodiment of the present invention further discloses an LS decision point. Referring to FIG. 8, the method includes:
- a receiving module configured to receive a first LS indication from a subscription database
- a judging module configured to determine, according to the first LS indication and a local policy, whether to perform local exchange;
- the sending module is configured to send a second LS indication to the LS control point when the determining module determines that the local exchange is allowed. If the judging module judges that the local exchange is not allowed, the local exchange is not performed. If the judging module judges that part of the service flows in the first LS indication are allowed to be locally exchanged, the second LS indication indicates that part of the service flows are allowed to be locally exchanged.
- the LS decision point may be the total ASN GW, PCRF or PF of the above method embodiment.
- the embodiment of the present invention further discloses a system for controlling local exchange.
- the method includes: an LS decision point, a subscription database;
- the contracting database is configured to send a first LS indication to the LS decision point, where the LS decision point is used to receive a first LS indication from the subscription database or the LS control point; according to the first LS indication And the local policy determines whether the local exchange is allowed. If the local exchange is allowed, the second LS indication is sent to the LS control point; otherwise, the local exchange is not performed.
- the system further includes:
- the LS control point is configured to determine whether to perform local exchange according to the second LS indication and the local policy, and if yes, notify the relevant network element to perform local exchange; otherwise, no local exchange is performed.
- a person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium, the program In execution, the flow of an embodiment of the methods as described above may be included.
- the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
- the method and system for controlling local switching in the embodiment of the present invention implement the control of the local area exchange of the signaling plane network element, which facilitates the control of the local exchange by different network operators.
- the above is only a preferred 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 within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
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Description
一种控制本地交换的方法及*** 本申请要求于 2009年 2月 26日提交中国专利局、申请号为 200910105674. 7、发明 名称为 "一种控制本地交换的方法及***"的中国专利申请的优先权, 其全部内容通过 引用结合在本申请中。 技术领域 本发明涉及网络通信技术,尤其涉及一种网络通信过程中控制本地交换的方法及系 统。 背景技术 在通信网络中, 为了改善用户体验和减少资源浪费, 通常会采用本地交换技术。 即 当通信路径上下行有重叠时, 在最靠近通信节点的网元处进行数据转发, 从而减少网络 侧承载资源浪费。 例如, 假设有终端 MS1和 MS2进行数据交换, MS1发出的数据包到达接 入服务网关 ASN GW1 , 则 ASN GW1将数据包发送到 CSN (连接服务网) , 再由 CSN网络将数 据包发给 MS2的 ASN GW2, 由 ASN GW2将数据包进行下行转发最终到达 MS2; 如果 ASN GW1 和 ASN GW2是同一个网元, 则 ASN GW1处的转发可以简化, 即 ASN GW1收到 MS1的数据包后 发现目标地址(MS2 )在自身覆盖范围内, 则直接将数据包进行下行转发, 最终发送到 MS2; 这种将数据进行本地交换路由的操作就是本地交换的一种典型方式。
在实现本发明过程中, 发明人发现现有技术中至少存在如下问题:
现在的本地交换技术中, 由执行本地交换的网元自行判断是否能够进行本地交换, 执行本地交换的网元通常只能是数据面网元, 例如: 在 WIMAX网络中的 DPF (DataPath Function, 数据通路功能)所在的 BS (Base Station, 基站)、 ASN GW (接入服务网关)、 和 FA (Policy Function, 策略功能)等, 因此信令面网元, 如: PCRF (Policy Charging Rule Function, 策略计费规则功能)、 PF (Policy Function, 策略功能) 等, 没有办 法控制本地交换,从而导致运营商无法动态控制本地交换。尤其是当 ASN (接入服务网) 与 CSN (连接服务网)分别由不同运营商运营时, 由于执行本地交换的数据面网元通常 位于 ASN内, CSN的网络运营商将完全无法控制承载网络中的本地交换。 发明内容
本发明的实施例提供了一种控制本地交换的方法及***, 以使得在通信网络中信令 面网元可以控制本地交换。
一种本地交换的方法, 包括:
一种控制本地交换的方法, 包括:
本地交换 LS决策点接收来自签约数据库的第一 LS指示;
所述 LS决策点根据所述第一 LS指示及本地策略判断是否允许进行本地交换; 如果允许进行本地交换, 则所述 LS决策点向 LS控制点下发第二 LS指示; 否则, 不进 行本地交换。
一种 LS决策点, 包括:
接收模块: 用于接收来自签约数据库的第一 LS指示;
判断模块: 用于根据所述第一 LS指示及本地策略判断是否允许进行本地交换; 发送模块:用于当所述判断模块判断允许本地交换时,向 LS控制点下发第二 LS指示。 一种控制本地交换的***, 包括: LS决策点、 签约数据库;
所述签约数据库, 用于向 LS决策点发送第一 LS指示;
所述 LS决策点, 用于接收来自所述签约数据库的第一 LS指示; 根据所述第一 LS指示 及本地策略判断是否允许进行本地交换; 如果允许进行本地交换, 向 LS控制点下发第二 LS指示; 否则, 不进行本地交换。
本发明实施例控制本地交换的方法及***, 实现了信令面网元对本地交换的控制, 方便了不同网络运营商对本地交换的控制。 附图说明 为了更清楚地说明本发明实施例的技术方案,下面将对实施例描述中所需要使用的 附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明的一些实施例, 对于 本领域普通技术人员来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得 其他的附图。
图 1为 WIMAX通信***中的业务流传输路径示意图;
图 2为本发明实施例控制本地交换的方法流程图;
图 3为本发明实施例一控制本地交换的方法流程图;
图 4为本发明实施例二控制本地交换的方法流程图;
图 5为本发明实施例三控制本地交换的方法流程图;
图 6为本发明实施例四控制本地交换的方法流程图;
图 7为本发明实施例五控制本地交换的方法流程图;
图 8为本发明实施例控制本地交换的装置示意图。 具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、完整 地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是全部的实施例。 基 于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有 其他实施例, 都属于本发明保护的范围。
WiMAX网络中业务数据传输路径如图 1所示, 主要网元包括:
MS, 用户终端;
ASN, 接入服务网络, 包括 BS和 ASN GW;
CSN, 连接服务网络, 包含 AAA、 HA等网元;
BS, 基站, 提供空口连接;
ASN GW, 接入服务网络网关, 提供数据汇聚和信令中继功能;
HA, Home Agent, 家乡代理, 提供移动 IP (Mobile IP, MIP)服务;
PF, Policy Function, 策略功能, 负责基于用户的策略决策功能, 它既可位于 ASN 也可位于 CSN。 若位于 ASN中, 则位于 Authenticator (鉴权器)和 Anchor SFA (Anchor Service Flow Authorization, 锚服务流授权)所在的 ASN GW,称为 Local PF (本地 PF); 若位于 CSN中,则为单独网元,或位于 AAA server中。在网络部署了 PCC (Policy Charging Control , 策略计费控制) ***的场景下, PF被 PCRF (Policy Charging Rule Function, 策略计费规则功能)取代, 位于 CSN中。
AAA Server (Authentication Authorization Accounting Server, 鉴权授权计费 服务器) 负责终端用户的鉴权授权计费。 漫游场景下, 拜访地网络中的 AAA服务器也称 为 AAA proxy (AAA代理服务器) 。
WiMAX***的业务数据通道包括 R1接口 (MS与 BS之间) 的空口承载、 R6接口 (BS与 ASN GW之间)和 R4接口 (ASN GW之间) 的 Datapath、 R3接口 (ASN GW与 HA之间) 的 MIP 隧道。 通用的数据通道如图 1中粗线所示。 当整个数据通道有部分重叠时, 或数据重复 经过同一个网元时, 可在该网元进行数据的本地交换。 当存在多个能够进行本地交换的 网元时, 为了达到最佳效果, 通常选择在离通信节点最近的网元进行本地交换。
本实施例提供的控制 LS ( Local Switching, 本地交换) 的***, 如图 2所示, 主 要包括: 签约数据库, 用于保存用户业务签约数据, 它可以位于 AAA服务器或 SPR (Subscription Profile Repository, 用户签约数据库)上。 本发明实施例中可以在 用户业务签约数据中增加第一 LS指示, 用于指示相关服务流进行本地交换。这里的 LS指 示是保存在签约数据库中的本地交换策略。
LS决策点, 用于根据来自签约数据库的第一 LS指示来判断是否允许进行本地交换, 如果允许, 则向 LS控制点下发第二 LS指示; 否则不进行本地交换。 它可以位于信令面网 元上, 例如: PF、 Local PF (本地 PF) 、 或 PCRF上。
LS控制点, 用于根据来自 LS决策点的第二 LS指示, 判断是否进行本地交换, 或直接 根据第二 LS通知相关网元进行本地交换。 它通常位于数据面网元上, 例如: 位于 ASN GW 或者 BS上。 根据适用范围不同, 第一 LS指示可以分为以下几类: 基于用户的、 基于终端的、 基 于业务的、 基于服务流的、 基于位置的、 或者以上的组合。
基于用户的第一 LS指示适用于该用户的所有服务流。基于终端的第一 LS指示适用于 该终端的所有服务流。基于业务的 LS指示适用于该业务包括的所有服务流。基于服务流 的 LS指示适用于该服务流。基于位置的第一 LS指示适用于指定位置的网元,可以是 ASN GW 或者 BS, 表示允许该网元对所有能进行本地交换的服务流执行本地交换。 进一步, 第一 LS指示可以为基于用户 +终端的 LS指示, 意为该用户使用该终端时, 所有的服务流允许本地交换。基于用户 /终端 /业务 /服务流 +位置的 LS指示, 意为允许指 定网元对符合条件的业务流执行本地交换, 例如基于用户 +位置的 LS指示, 即为允许指 定位置的网元对该用户的服务流执行本地交换。
本发明实施例控制本地交换的方法, 包括:
1、 本地交换 LS决策点接收来自签约数据库的第一 LS指示;
2、 所述 LS决策点根据所述第一 LS指示及本地策略判断是否允许进行本地交换; 其中: 如果本地策略允许第一 LS指示中的本地交换类型, 则允许进行本地交换; 如 果本地策略不允许第一 LS指示中的本地交换类型, 则不允许进行本地交换; 所述 LS决策 点位于信令面网元上。
3、 如果允许进行本地交换, 则所述 LS决策点向 LS控制点下发第二 LS指示; 否则,
不进行本地交换。 进一步的, LS控制点可根据所述第二 LS指示通知负责执行本地交换的网元进行本地 交换。 或者, 根据所述第二 LS指示及本地策略判断是否进行本地交换, 如果是, 则通知 负责执行本地交换的网元进行本地交换, 否则, 不进行本地交换, 执行现有技术相关流 程。 实施例一 本发明实施例控制本地交换的方法参考图 3, 包括:
301、 签约数据库向 LS决策点下发第一 LS指示, 具体为: 当有触发条件发生时, 签约数据库向 LS决策点下发第一 LS指示, 该指示是保存在签 约数据库中的本地交换策略, 可以被包含在用户业务签约信息中。 本发明并不限定这个 LS指示的具体形式, 这里仅给出两种可行的形式: 1, 使用一个复合参数来表示本地交 换策略, 即 LS指示参数包括两部分, 前一部分用于表示本地交换的类型, 用于区分是基 于服务流、 基于用户、 基于终端、 基于业务、 基于位置、 或其组合的本地交换, 后一部 分用于表示允许本地交换的对象, 例如服务流标识、 用户标识、 终端标识、 业务标识、 位置信息、 或其组合等。 2, 作为一个单独的参数, 当它与其他参数在一起时, 组合起 来表示本地交换策略, 例如: 将 LS指示放在 SF Info (服务流信息) 参数中表示允许该 服务流本地交换、 放在 user profile (用户档案) 中表示允许该用户或终端的所有服务 流本地交换、 放在业务描述信息中表示允许该业务的服务流本地交换、 或是与位置信息 组合表示允许基于位置的本地交换。 触发条件可以有多种, 例如签约数据库收到 LS决策点的请求消息、 签约数据库中的 用户业务签约信息发生变化或运营商改变 LS策略等。
302、 LS决策点根据来自签约数据库的第一 LS指示进行 LS决策。
LS决策点收到第一 LS指示后, 判断是否允许本地交换。 判断是否允许本地交换可以 根据第一 LS指示及 LS决策点的本地策略来进行。这里所说的 LS决策点的本地策略指的是 保存在 LS决策点的与本地交换有关的策略,它可以为运营商预先配置在 LS决策点上的本 地交换策略、 LS决策点从 ASN获得的承载信息或服务流信息、 LS决策点从 CSN获得的计费 或 QoS控制策略等。 当 LS决策点没有相关的本地策略或本地策略允许进行步骤 301中第一 LS指示所表示
的本地交换类型, 则这里作出的 LS决策与步骤 301中的签约数据库发送的本地交换策略 相同; 例如: 当签约数据库发送的 LS指示是允许当前服务流进行本地交换, 则 LS决策点 作出判断允许当前服务流进行本地交换。 当 LS决策点本地策略不允许进行本地交换,则这里作出的决策是不允许进行本地交 换。 例如: 签约数据库提供的本地交换策略是允许进行某种类型的本地交换, 但是 LS决 策点在此之前已得知当前网络的计费点位于 CSN内 (例如 HA ) , 并且所有服务流必须被 计费, 因此所有服务流必须经过 CSN来完成计费信息的收集, 则 LS决策点作出判断不允 许进行本地交换, 后续的流程不再涉及本地交换。 当 LS决策点的本地策略不允许进行步骤 301中第一 LS指示所表示的本地交换类型, 但可允许 LS指示中范围较小的本地交换类型, 如: 允许用户的部分服务流或终端的部分 服务流进行本地交换, 则这里作出的 LS决策则与步骤 301中的签约数据库发送的本地交 换策略不同, 仅允许第一 LS指示中的部分服务流进行本地交换; 例如签约数据库提供的 本地交换策略是允许当前用户进行本地交换,但是 LS决策点在此之前已得知该用户的某 些服务流必须由后端网元进行合法监听, 因此这些被监听的服务流不能进行本地交换, 则 LS决策点做出判断仅允许该用户除该部分被合法监听的服务流之外的服务流进行本 地交换。
303、 如果 LS决策点允许进行本地交换, 则 LS决策点向 LS控制点下发第二 LS指示, 表示 LS决策点允许进行某种类型的本地交换;如果 LS决策点仅允许部分服务流进行本地 交换, 则 LS决策点向 LS控制点下发第二 LS指示中指明允许部分服务流进行本地交换。 304、 LS控制点根据来自 LS决策点的第二 LS指示和 LS控制点本地策略判断是否执行 本地交换, 如果是, 则通知负责执行本地交换的数据面网元进行本地交换。 否则执行现 有技术相关流程, 不再赘述。 或 LS控制点根据所述第二 LS指示通知负责执行本地交换的 数据面网元进行本地交换。 这里提到的 LS控制点的本地策略是指 LS控制点保存的本地交换相关的策略,包括但 不限于运营商预配置的本地交换策略、 LS控制点维护的用户终端服务流上下文、 计费或 QoS控制策略等。 实施例二 本实施例中, 签约数据库位于 AAA服务器, LS决策点和 LS控制点均位于 Anchor SFA (Anchor Service Flow Authorizat ion, 锚服务流授权) 所在的 ASN GW上, 同时这个
ASN GW也是用于 dynamic QoS控制的 Local PF所在的网元。 ASN GW进行的 LS决策和 LS控 制的步骤合并为一个控制步骤。 本实施例适用于非 PCC场景, 包括 dynamic QoS和非 dynamic QoS。 本发明实施例本地交换的方法参考图 4, 包括: 401、 当终端入网鉴权成功, AAA服务器向 Authent icator (鉴权器) 和 Anchor SFA 所在的 ASN GW发送 Access Accept (接入准许) 消息, 消息中携带有 LS指示; 所述的 LS 指示可以携带在 Access Accept消息的用户签约信息中。 或者用户签约信息被更新时, AAA服务器向该 ASN GW发送 CoA Request ( Change Of Authorizat ion request , 授权更改请求) 消息, 消息中携带有 LS指示; LS指示可以携 带 CoA Request消息中更新后的用户签约信息中; ASN GW收到 CoA request后, 可向 AAA 服务器返回 CoA Response消息作为回应。
402、 ASN GW保存收到的用户签约信息。 然后 ASN GW根据 LS指示和本地策略判断是 否允许进行本地交换, 如果不进行本地交换, 则按照现有技术发起预置流 ( pre-provi s ion service flow)建立过程 (如果收至 U的是 Access Accept消息) , 或 者服务流(包括预置流和已建立的动态服务流)建立 /修改 /删除过程(如果收到的是 CoA 消息) ; 如果决定进行本地交换, 则发起本地交换的预置流建立过程, 或者发起本地交 换的服务流(包括预置流和已建立的动态服务流)建立 /修改 /删除过程。如果决定允许 部分服务流进行本地交换,则针对允许进行本地交换的部分服务流发起本地交换的预置 流建立过程, 或者发起本地交换的服务流建立 /修改 /删除过程。
本实施例同样适用于 Dynamic QoS场景中的终端发起的动态服务流建立 /修改过程,
MA服务器向 ASN GW下发第一 LS指示的步骤与步骤 401类似, 不再赘述; 步骤 402为: MS 可随时请求动态服务流的建立 /修改, 当 ASN GW收到 MS的服务流建立或修改请求时, 判 断是否进行本地交换,如果不进行本地交换,则按现有技术返回服务流建立或修改响应; 如果进行本地交换,则向执行本地交换的数据面网元返回带有 LS指示的服务流建立或修 改响应, 以使得数据面网元执行本地交换的服务流建立或修改; 如果允许部分服务流进 行本地交换, 则 LS指示指明允许部分服务流进行本地交换。 实施例三
本实施例中签约数据库位于 AAA服务器, LS决策点位于 PCRF或者 PF上, LS控制点位 于接入服务网络策略计费执行功能 A-PCEF或 Anchor SFA所在的 ASN GW上。
本发明实施例本地交换的方法参考图 5, 包括:
501、该步骤与实施例二中步骤 401类似, ASN GW收到来自 AAA服务器的 Access Accept 消息或 CoA Request消息, 其中携带有第一 LS指示, 不再赘述。
502、 ASN GW向 PCRF/PF发授权请求。 具体为: 如果是 PCC场景, 则 ASN GW向 PCRF发送 IP CAN Session建立请求消息, 该请求消息 可以为 DIAMETER协议的 CCR (Credit Control Request, 信用控制请求) 消息, 消息中 携带步骤 501中收到的第一 LS指示。 或者, 经过步骤 501之后的任意时刻, ASN GW需要发 起 IP CAN Session修改, 或者收到 IP CAN Bear信令, 例如 RR Request消息, 用于请求 IP CAN Session修改, 则 ASN GW向 PCRF发送 IP CAN Session修改请求, 请求消息可以使 用 DIAMETER协议的 CCR消息,消息中携带步骤 501中收到的 LS指示。需要说明的是, ASN GW 与 PCRF之间的消息可能需要通过 PDF (Policy Distribution Function, 策略分发功能) 转发, 后面凡是涉及到 PCRF与 ASN GW之间的交互都是如此, 不再重复说明。 如果是 PF场景, 贝 ijASN GW向 PF发送 SFA LU (Service Flow Authorization Location Update,月艮务流授权位置更新)请求消息或 RR request (Resource Reservation request, 资源预留请求) 消息, 消息中携带步骤 501中收到的第一 LS指示。
503、 PCRF/PF根据第一 LS指示及本地策略判断是否允许本地交换, 然后返回授权响 应。 具体为:
如果是 PCC场景, 则 PCRF向 ASN GW返回 IP CAN Session建立响应或 IP CAN Session 修改响应, 响应消息可使用 DIAMETER协议的 CCA (Credit Control Answer, 信用控制应 答)消息。 如允许进行本地交换, 消息中带有第二 LS指示; 如果允许部分服务流进行本 地交换, 则消息中携带的第二 LS指示指明允许部分服务流进行本地交换; 如果不允许, 则消息中没有第二 LS指示, 执行现有技术的相关流程。 如果是 PF场景, 则 PF向 ASN GW发送 RR request消息 (作为对 SFA LU消息的响应) 或 RR response消息 (作为对 RR request的响应) 。 如允许进行本地交换, 消息中带有第 二 LS指示。 如果允许部分服务流进行本地交换, 则消息中携带的第二 LS指示指明允许部 分服务流进行本地交换; 如果不允许, 则消息中没有第二 LS指示, 执行现有技术的相关 流程。
504、 ASN GW收到来自 PCRF/PF的第二 LS指示后, 判断是否进行本地交换, 如果是,
则向 Anchor DPF (Anchor Datapath Funct ion, 锚数据通路功能)所在的 ASN GW发送带 第二 LS指示的 RR request , 来发起用于本地交换的承载建立; 或者向 Anchor DPF所在的 ASN GW发送带 LS指示的 IP CAN Bear信令响应, 例如 RR response , 来确认用于本地交换 的承载建立。 否则, 按现有技术发送 RR request给 Anchor DPF所在的 ASN GW, 发起承载 建立过程; 或者按现有技术发送 RR response给 Anchor DPF所在的 ASN GW作为 IP CAN Bear 信令的响 应。 实施例四
本实施例中签约数据库位于 SPR, LS决策点位于 PCRF, LS控制点位于 A-PCEF所在的 ASN GW。 适用于 PCC场景。 本发明实施例本地交换的方法参考图 6, 包括:
601、 ASN GW向 PCRF发授权请求。 具体为:
ASN GW向 PCRF发送 IP CAN Sess ion建立请求, 请求消息可使用 DIAMETER协议的 CCR ( credit control request , 信用控制请求) 消息。 或者, ASN GW需要发起 IP CAN Sess ion修改, 或者收到 IP CAN Bear信令, 例如 RR Request消息, 用于请求 IP CAN Sess ion修改, 则 ASN GW向 PCRF发送 IP CAN Sess ion修 改请求, 请求消息使用 DIAMETER协议的 CCR消息。 需要说明的是, ASN GW与 PCRF之间的 消息可能需要通过 PDF ( Pol icy Di stribut ion Funct ion, 策略分发功能)转发。
602、 PCRF从 SPR获取用户签约信息, 其中包括第一 LS指示。 该步骤可能由步骤 601触发之后,则为步骤 601后, PCRF向 SPR发请求消息, SPR向 PCRF 发送用户签约信息。 该步骤也可能与步骤 601无关, 发生在步骤 601之前或者同时发生, 则为 SPR主动向 PCRF发送用户签约信息。
603、 PCRF判断是否允许本地交换, 然后返回授权响应。 具体为:
PCRF向 ASN GW返回 IP CAN Sess ion建立响应或 IP CAN Sess ion修改响应, 响应消息 使用 DIAMETER协议的 CCA (Credit Control Answer, 信用控制应答) 消息。 如 PCRF允许 进行本地交换, 消息中带有第二 LS指示。 如果允许部分服务流进行本地交换, 则消息中 携带的第二 LS指示指明允许部分服务流进行本地交换;
604、 ASN GW收到来自 PCRF的第二 LS指示后, 判断是否进行本地交换, 如果是, 则 向 Anchor DPF (Anchor Datapath Function, 锚数据通路功能)所在的 ASN GW发送带第 二 LS指示的 RR request, 来发起用于本地交换的承载建立; 或者向 Anchor DPF所在的 ASN GW发送带 LS指示的 IP CAN Bear信令响应, 例如 RR response, 来确认用于本地交换的承 载建立。 否则, 按现有技术发送 RR request给 Anchor DPF所在的 ASN GW, 发起承载建立, 或者按现有技术发送 RR response给 Anchor DPF所在的 ASN GW, 确认承载建立。 本实施例中, SPR可能是一个逻辑功能,它可位于 AAA服务器中,则步骤 602应为 PCRF 从 AAA服务器获取用户签约信息, 其中包括第一 LS指示。 实施例五 本发明实施例本地交换的方法参考图 7, 包括: 本实施例适用于 PCC场景, 签约数据库位于 SPR, LS决策点位于 PCRF, LS控制点位于 A-PCEF所在的 ASN GW。
701、 PCRF从 SPR获取用户签约信息, 其中包括第一 LS指示。 可能是 PCRF做内部决策或者收到来自 AF的业务建立请求触发 PCRF向 SPR请求用户签 约信息,然后 SPR向 PCRF发送用户签约信息;也可能是 SPR主动向 PCRF发送用户签约信息。
702、 PCRF判断是否允许本地交换, 如果允许, 则向 ASN GW发送 IP CAN Session修 改请求, 该请求使用 DIAMETER协议的 RAR (Re-Authorization Request , 重授权请求) 消息, 消息中带有第二 LS指示。 如果允许部分服务流进行本地交换, 则消息中携带的第 二 LS指示指明允许部分服务流进行本地交换; 703、 ASN GW判断是否进行本地交换, 如果是, 则发起本地交换的承载建立。 否则, 按现有技术发起承载建立。
704、 ASN GW向 PCRF返回 IP CAN Session修改响应, 该响应使用 DIAMETER协议的 RAA (Re-Authorization Answer, 重授权应答) 消息。 本实施例中, SPR可能是一个逻辑功能, 它位于 AAA服务器中, 则步骤 701应为 PCRF 从 AAA服务器获取用户签约信息, 其中包括 LS指示。
本发明实施例还公开了一种 LS决策点, 参考图 8, 包括:
接收模块: 用于接收来自签约数据库的第一 LS指示;
判断模块: 用于根据所述第一 LS指示及本地策略判断是否允许进行本地交换;
发送模块:用于当所述判断模块判断允许本地交换时,向 LS控制点下发第二 LS指示。 如果判断模块判断不允许本地交换, 则不进行本地交换, 如果判断模块判断允许第 一 LS指示中的部分服务流进行本地交换,所述第二 LS指示指明允许部分服务流进行本地 交换。
所述 LS决策点可以为上述方法实施例总的 ASN GW、 PCRF或 PF。
本发明实施例还公开了一种控制本地交换的***, 参考图 2, 包括: LS决策点, 签 约数据库;
所述签约数据库, 用于向 LS决策点发送第一 LS指示; 所述 LS决策点, 用于接收来自所述签约数据库或所述 LS控制点的第一 LS指示; 根据 所述第一 LS指示及本地策略判断是否允许进行本地交换; 如果允许进行本地交换, 向 LS 控制点下发第二 LS指示; 否则, 不进行本地交换。
该***还进一步包括:
LS控制点, 用于根据所述第二 LS指示及本地策略判断是否进行本地交换, 如果是则 通知相关网元进行本地交换, 否则, 不进行本地交换。 本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程,是可以通 过计算机程序来指令相关的硬件来完成,所述的程序可存储于一计算机可读取存储介质 中, 该程序在执行时, 可包括如上述各方法的实施例的流程。 其中, 所述的存储介质可 为磁碟、光盘、只读存储记忆体(Read-Only Memory, ROM)或随机存储记忆体(Random Access Memory, RAM)等。 本发明实施例控制本地交换的方法及***, 实现了信令面网元对本地交换的控制, 方便了不同网络运营商对本地交换的控制。 以上所述, 仅为本发明较佳的具体实施方式, 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, 可轻易想到的变化或替 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该以权利要求的保 护范围为准。
Claims
1、 一种控制本地交换的方法, 其特征在于, 包括:
本地交换 LS决策点接收来自签约数据库的第一 LS指示;
所述 LS决策点根据所述第一 LS指示及本地策略判断是否允许进行本地交换; 如果允许进行本地交换, 则所述 LS决策点向 LS控制点下发第二 LS指示; 否则, 不进 行本地交换。
2、 如权利要求 1所述的方法, 其特征在于, 进一步包括:
所述 LS控制点根据所述第二 LS指示及本地策略判断是否进行本地交换,如果是则通 知相关网元进行本地交换, 否则, 不进行本地交换。
3、如权利要求 1所述的方法, 其特征在于, 如果 LS决策点判断允许第一 LS指示中的 部分服务流进行本地交换, 所述第二 LS指示指明允许部分服务流进行本地交换。
4、如权利要求 1一 3任意一项所述的方法,其特征在于,签约数据库位于 AAA服务器,
LS决策点和 LS控制点均位于 Anchor SFA锚服务流授权所在的接入服务网关 ASN GW上; 所述 LS决策点接收来自签约数据库的第一 LS指示包括- 所述 ASN GW接收来自所述鉴权授权计费服务器 AAA服务器的接入准许消息或授权更 改请求消息, 所述接入准许消息或授权更改请求消息中携带有所述第一 LS指示。
5、如权利要求 1一 3任意一项所述的方法, 其特征在于, 所述签约数据库位于 AAA服 务器, 所述 LS决策点位于策略计费规则功能 PCRF, 所述 LS控制点位于接入服务网络策略 计费执行功能 A-PCEF所在的 ASN GW上;
所述 LS决策点接收来自签约数据库的第一 LS指示包括- 所述 ASN GW接收来自所述 AAA服务器的第一 LS指示, 所述 PCRF接收来自所述 ASN GW 的 IP CAN Session建立请求或 IP CAN Session修改请求, 所述 IP CAN Session建立请求 或 IP CAN Session修改请求中携带有所述第一 LS指示;
所述 LS决策点向 LS控制点下发第二 LS指示包括:
所述 PCRF向 ASN GW返回 IP CAN Session建立响应或 IP CAN Session修改响应, 所述 IP CAN Session建立响应或 IP CAN Session修改响应携带有所述 LS第二指示。
6、 如权利要求 1一 3任意一项所述的方法, 其特征在于, 所述签约数据库位于 AAA服 务器, 所述 LS决策点位于策略功能 PF, 所述 LS控制点位于 Anchor SFA所在的 ASN GW上; 所述 LS决策点接收来自签约数据库的第一 LS指示包括- 所述 ASN GW接收来自所述 AAA服务器的第一 LS指示, 所述 PF接收来自所述 ASN GW的 服务流授权位置更新消息或资源预留请求消息,所述服务流授权位置更新消息或资源预 留请求消息中携带有所述第一 LS指示;
所述 LS决策点向 LS控制点下发第二 LS指示包括:
所述 PF向 ASN GW返回 RR request消息或 RR response消息, 所述 RR request消息或 RR response消息中携带有所述第二 LS指示。
7、 如权利要求 1一 3任意一项所述的方法, 其特征在于, 所述签约数据库位于 SPR, LS决策点位于 PCRF, LS控制点位于 A-PCEF所在的 ASN GW;
所述 LS决策点接收来自签约数据库的第一 LS指示包括- 所述 PCRF接收来自所述 SPR的第一 LS指示;
所述 LS决策点向 LS控制点下发第二 LS指示包括:
所述 PCRF向所述 ASN GW返回 IP CAN Session建立响应或 IP CAN Session修改响应消 息, 所述 IP CAN Session建立响应或 IP CAN Session修改响应消息中携带有所述第二 LS 指示。
8、 如权利要求 1一 3任意一项所述的方法, 其特征在于, 签约数据库位于 SPR, LS决 策点位于 PCRF, LS控制点位于 A-PCEF所在的 ASN GW;
所述 LS决策点接收来自签约数据库的第一 LS指示包括- 所述 PCRF接收所述 SPR发送的第一 LS指示;
所述 LS决策点向 LS控制点下发第二 LS指示包括:
所述 PCRF向所述 ASN GW发送 IP CAN Session修改请求消息, 所述 IP CAN Session修 改请求消息中带有所述第二 LS指示;
9、 一种 LS决策点, 其特征在于, 包括:
接收模块: 用于接收来自签约数据库的第一 LS指示;
判断模块: 用于根据所述第一 LS指示及本地策略判断是否允许进行本地交换; 发送模块:用于当所述判断模块判断允许本地交换时,向 LS控制点下发第二 LS指示。
10、 如权利要求 9所述的 LS决策点, 其特征在于, 所述 LS决策点为 ASN GW、 PCRF或 PF。
11、 一种控制本地交换的***, 其特征在于, 包括: LS决策点, 签约数据库; 所述签约数据库, 用于向 LS决策点发送第一 LS指示;
所述 LS决策点, 用于接收来自所述签约数据库的第一 LS指示; 根据所述第一 LS指示 及本地策略判断是否允许进行本地交换; 如果允许进行本地交换, 向 LS控制点下发第二 LS指示; 否则, 不进行本地交换。
12、 如权利要求 11所述的***, 其特征在于, 该***进一步包括:
LS控制点, 用于根据所述第二 LS指示及本地策略判断是否进行本地交换, 如果是则 通知相关网元进行本地交换, 否则, 不进行本地交换。
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