CN101060413B - Roaming policy and charging control method and system - Google Patents

Abstract

The provided cruise strategy and charge control method comprises: A. V-PCRF receives the authorized query from AGW to obtain application message from AF; B. V-PCRF sets the access strategy and charge rule according to obtained message and local strategy, and sends the result to AGW; and C. the latter executes the strategy and charge control to UE. This invention reduces signaling delay, and improves efficiency.

Description

Translated fromChinese

漫游时的策略和计费控制方法及系统Policy and charging control method and system during roaming

技术领域technical field

本发明涉及移动通信技术，尤其涉及一种漫游时的策略和计费控制(Policy and Charging Control，PCC)方法及系统。The present invention relates to mobile communication technology, in particular to a roaming policy and charging control (Policy and Charging Control, PCC) method and system.

背景技术Background technique

随着通信和信息技术的高度发展、以及国际互联网协议(IP)技术的日益成熟，国际互联网(Internet)的应用迅速普及，人们不再满足于单一的语音通信方式，而需要全新的多媒体通信方式。而同时，移动通信网络和固定通信网络仍是人们通信的主要途径，因此，移动通信网络与固定通信网络的IP化，以及Internet与电信网络的融合就无可争议地成为业界公认的发展方向。也就是说，能够支持多种接入技术的IP多媒体通信系统成为今后发展的重点。With the rapid development of communication and information technology and the maturity of Internet Protocol (IP) technology, the application of Internet (Internet) is rapidly popularized. People are no longer satisfied with a single voice communication method, but need a new multimedia communication method. . At the same time, mobile communication networks and fixed communication networks are still the main ways for people to communicate. Therefore, the IP-based mobile communication networks and fixed communication networks, as well as the integration of the Internet and telecommunications networks, have undoubtedly become the industry's recognized development direction. That is to say, the IP multimedia communication system that can support multiple access technologies will become the focus of future development.

IP多媒体子系统(IP Multimedia Subsystem，IMS)是第三代移动通信标准化伙伴项目(3rd Generation Partnership Project，3GPP)在分组承载网基础上引入的一个完成IP多媒体通信控制的子系统，它能够面向多种接入技术，按照个性化用户数据，屏蔽用户接入方式，控制业务能力的开放程度，提供IP多媒体通信体验，满足了多媒体业务在安全、计费、漫游及服务质量(Quality of Service，QoS)等各方面的需求。IP Multimedia Subsystem (IP Multimedia Subsystem, IMS) is a subsystem introduced by the 3rd Generation Partnership Project (3GPP) on the basis of packet bearer network to complete IP multimedia communication control. An access technology that shields user access methods according to personalized user data, controls the openness of service capabilities, provides IP multimedia communication experience, and satisfies the security, billing, roaming and quality of service (Quality of Service, QoS) requirements of multimedia services. ) and other various needs.

由于QoS策略控制和计费控制在消息内容上有很多是相似或重复的，因此，将二者进行融合不仅可以提高通信效率，还降低业务建立时延。目前，3GPP、3GPP2等组织都在制定基于IMS的融合了策略控制和计费控制的策略和计费控制规范。Since QoS policy control and charging control are similar or repeated in many message contents, combining the two can not only improve communication efficiency, but also reduce service establishment delay. At present, organizations such as 3GPP and 3GPP2 are formulating IMS-based policy and charging control specifications that integrate policy control and charging control.

3GPP2中的策略和计费控制在基于业务的承载控制(Service BasedBearer Control，SBBC)中规定，参见图1所示的SBBC功能模型，包括应用功能(Application Function，AF)、策略和计费规则功能(Policy and Charging Rule Function，PCRF)、及接入网关(Access Gateway，AGW)。其中，AF用于根据用户设备(User Equipment，UE)的业务请求提供动态业务信息；PCRF用于制定策略和计费规则，包括制定计费规则的功能实体计费规则功能(Charging Rule Function，CRF)和制定策略规则的功能实体策略决定功能(Policy Decision Function，PDF)；AGW用于执行策略和计费规则，包括执行计费规则的功能实体计费执行功能(Traffic Plane Function，TPF)和执行策略规则的功能实体策略执行功能(Policy Enforcement Function，PEF)；AF和PCRF间的接口为Tx接口，PCRF和AGW间的接口为Ty接口。The policy and charging control in 3GPP2 are stipulated in Service Based Bearer Control (SBBC), refer to the SBBC functional model shown in Figure 1, including application function (Application Function, AF), policy and charging rule functions (Policy and Charging Rule Function, PCRF), and Access Gateway (AGW). Among them, AF is used to provide dynamic service information according to the service request of user equipment (User Equipment, UE); PCRF is used to formulate policies and charging rules, including the functional entity charging rule function (Charging Rule Function, CRF) for formulating charging rules ) and the functional entity Policy Decision Function (Policy Decision Function, PDF) for formulating policy rules; AGW is used to execute policies and charging rules, including the functional entity charging execution function (Traffic Plane Function, TPF) and execution of charging rules The function entity of the policy rule is the Policy Enforcement Function (PEF); the interface between the AF and the PCRF is the Tx interface, and the interface between the PCRF and the AGW is the Ty interface.

参见图2所示，当UE漫游到拜访网时，SBBC漫游模型包括AF、归属策略和计费规则功能(Home Policy and Charging Rule Function，H-PCRF)、拜访策略和计费规则功能(Visited Policy and Charging Rule Function，V-PCRF)、及AGW。其中，AF和H-PCRF间的接口为Tx接口，H-PCRF和V-PCRF间、及V-PCRF和AGW间的接口均为Ty接口。As shown in Figure 2, when the UE roams to the visited network, the SBBC roaming model includes AF, Home Policy and Charging Rule Function (Home Policy and Charging Rule Function, H-PCRF), Visited Policy and Charging Rule Function (Visited Policy and Charging Rule Function, V-PCRF), and AGW. Wherein, the interface between the AF and the H-PCRF is a Tx interface, and the interfaces between the H-PCRF and the V-PCRF, and between the V-PCRF and the AGW are all Ty interfaces.

参见图3所示，现有技术中漫游时的策略和计费控制过程主要包括以下几个步骤：Referring to Fig. 3, the policy and charging control process during roaming in the prior art mainly includes the following steps:

步骤301：UE向AGW发起业务请求；Step 301: UE initiates a service request to AGW;

步骤302：AGW收到来自UE的业务请求后，向V-PCRF发送SBBC授权查询，查询拜访网中与该UE相关的策略和计费规则；Step 302: After receiving the service request from the UE, the AGW sends an SBBC authorization query to the V-PCRF to query the policies and charging rules related to the UE in the visited network;

步骤303：V-PCRF收到来自的AGW授权查询后，向UE所归属的归属网中的H-PCRF发送策略查询，查询归属网中与该UE相关的策略和计费规则；Step 303: After receiving the authorization query from the AGW, the V-PCRF sends a policy query to the H-PCRF in the home network to which the UE belongs, and queries the policies and charging rules related to the UE in the home network;

步骤304：H-PCRF收到策略查询后，向AF发送应用信息查询，查询UE所请求业务的相关信息；Step 304: After receiving the policy query, the H-PCRF sends an application information query to the AF to query the relevant information of the service requested by the UE;

步骤305：AF收到应用信息查询后，向H-PCRF返回应用信息；Step 305: After receiving the application information query, the AF returns the application information to the H-PCRF;

步骤306：H-PCRF根据收到的应用信息、及本地运营商设置的一些策略和计费控制规则也就是本地设置的归属网策略，制定归属网的策略和计费规则；Step 306: H-PCRF formulates policies and charging rules for the home network according to the received application information and some policies and charging control rules set by the local operator, that is, the home network policy set locally;

步骤307：H-PCRF将制定的策略和计费规则发送给V-PCRF，作为策略查询响应；Step 307: H-PCRF sends the formulated policy and charging rules to V-PCRF as a policy query response;

步骤308：V-PCRF根据收到的策略和计费规则、及本地运营商设置的一些策略和计费控制规则也就是本地设置的拜访网策略，制定拜访网的策略和计费规则；Step 308: V-PCRF formulates policies and charging rules for the visited network according to the received policies and charging rules, and some policies and charging control rules set by the local operator, that is, locally set visiting network policies;

步骤309：V-PCRF将制定的策略和计费规则发送给AGW，作为SBBC授权响应；Step 309: V-PCRF sends the formulated policy and charging rules to the AGW as an SBBC authorization response;

步骤310：AGW根据收到的策略和计费规则，对UE执行策略和计费控制。Step 310: The AGW performs policy and charging control on the UE according to the received policy and charging rules.

需要说明的是，在实际的策略和计费控制过程中，AGW收到来自UE的业务请求后，首先需根据自身设置判断是否需要向V-PCRF发送SBBC授权查询，如果是，则执行步骤302，否则，直接根据自身设置处理UE的业务请求；同理，V-PCRF收到授权查询后，首先需根据自身设置判断是否需要向H-PCRF发送策略查询，如果是，则执行步骤303，否则，直接根据自身设置处理授权查询；H-PCRF收到策略查询后，首先需根据自身设置判断是否需要向AF发送应用信息查询，如果是，则执行步骤304，否则，直接根据自身设置处理策略查询。本文中，只针对图3所示的情况进行详细说明。It should be noted that in the actual policy and charging control process, after the AGW receives the service request from the UE, it first needs to judge whether it needs to send the SBBC authorization query to the V-PCRF according to its own settings, and if so, go tostep 302 , otherwise, directly process the service request of the UE according to its own settings; similarly, after the V-PCRF receives the authorization query, it first needs to judge whether it needs to send a policy query to the H-PCRF according to its own settings, if yes, executestep 303, otherwise , directly process the authorization query according to its own settings; after the H-PCRF receives the policy query, it first needs to judge whether it needs to send an application information query to the AF according to its own settings, if yes, executestep 304, otherwise, directly process the policy query according to its own settings . Herein, only the situation shown in FIG. 3 will be described in detail.

由图3所述的各步骤可见，在漫游时的策略和计费控制过程中，V-PCRF需要通过归属网的H-PCRF才能与AF进行信息交互，这样很容易造成信令的延时，进而降低策略和计费控制过程的执行效率。From the steps described in Figure 3, it can be seen that during the policy and charging control process during roaming, the V-PCRF needs to pass through the H-PCRF of the home network to exchange information with the AF, which can easily cause signaling delays. In turn, the execution efficiency of the policy and charging control process is reduced.

发明内容Contents of the invention

有鉴于此，本发明的目的在于提供一种漫游时的策略和计费控制方法及系统，减少信令延时。In view of this, the object of the present invention is to provide a policy and charging control method and system during roaming to reduce signaling delay.

为达到上述目的，本发明中V-PCRF从UE所归属的归属网获取归属网策略，漫游时的策略和计费控制方法主要包括以下步骤：In order to achieve the above object, the V-PCRF in the present invention obtains the home network policy from the home network to which the UE belongs, and the policy and charging control method during roaming mainly include the following steps:

A、拜访策略和计费规则功能V-PCRF收到来自接入网关AGW的授权查询后，通过向应用功能AF发送应用信息查询从AF得到应用信息；A. After receiving the authorization query from the access gateway AGW, the access policy and charging rule function V-PCRF obtains the application information from the AF by sending an application information query to the application function AF;

B、V-PCRF根据得到的应用信息、获取的归属网策略及本地设置的拜访网策略，制定拜访网的策略和计费规则，并将制定的策略和计费规则发送给AGW；B. V-PCRF formulates the policy and charging rules of the visited network according to the obtained application information, the obtained home network policy and the locally set visited network policy, and sends the formulated policy and charging rules to the AGW;

C、AGW根据收到的策略和计费规则，对用户设备UE执行策略和计费控制。C. The AGW performs policy and charging control on the user equipment UE according to the received policy and charging rules.

其中，所述V-PCRF从归属网获取归属网策略为：V-PCRF从归属网的用户签约数据库获取归属网策略；或者为：V-PCRF从归属网的归属策略和计费规则功能H-PCRF获取归属网策略。Wherein, the V-PCRF obtains the home network policy from the home network as follows: the V-PCRF obtains the home network policy from the user subscription database of the home network; or: the V-PCRF obtains the home network policy from the home network's home policy and charging rule function The PCRF obtains the home network policy.

步骤B所述制定为：V-PCRF得到应用信息、获取归属网策略后，根据得到的应用信息、获取的归属网策略及本地设置的拜访网策略，制定拜访网的策略和计费规则；Step B is formulated as: after the V-PCRF obtains the application information and the home network policy, formulate the policy and charging rules of the visited network according to the obtained application information, the obtained home network policy and the locally set visited network policy;

或者为：V-PCRF得到应用信息后，将得到的应用信息发送给H-PCRF，H-PCRF根据V-PCRF发送来的应用信息及本地设置的归属网策略制定归属网的策略和计费规则，并将制定的策略和计费规则返回给V-PCRF；V-PCRF根据H-PCRF返回的策略和计费规则及本地设置的拜访网策略，制定拜访网的策略和计费规则。Or: after the V-PCRF obtains the application information, it sends the obtained application information to the H-PCRF, and the H-PCRF formulates the home network policy and charging rules according to the application information sent by the V-PCRF and the home network policy set locally , and return the formulated policy and charging rule to the V-PCRF; the V-PCRF formulates the policy and charging rule of the visited network according to the policy and charging rule returned by the H-PCRF and the locally set visited network policy.

当归属网策略改变时，该方法进一步包括：归属网通知V-PCRF更新原有归属网策略；则步骤B所述制定为：V-PCRF根据得到的应用信息、更新的归属网策略及本地设置的拜访网策略，制定拜访网的策略和计费规则。When the home network strategy changes, the method further includes: the home network notifies the V-PCRF to update the original home network strategy; then step B is formulated as: the V-PCRF obtains the application information, updated home network strategy and local settings The visiting network strategy, formulate the visiting network strategy and billing rules.

所述归属网通知V-PCRF更新原有归属网策略为：归属网的用户签约数据库将改变的归属网策略发送给V-PCRF，V-PCRF根据收到的归属网策略对原有归属网策略进行更新；The home network notifies the V-PCRF to update the original home network policy as follows: the user subscription database of the home network sends the changed home network policy to the V-PCRF, and the V-PCRF updates the original home network policy according to the received home network policy to update;

或者为：归属网的H-PCRF将改变的归属网策略发送给V-PCRF，V-PCRF根据收到的归属网策略对原有归属网策略进行更新；Or: the H-PCRF of the home network sends the changed home network policy to the V-PCRF, and the V-PCRF updates the original home network policy according to the received home network policy;

或者为：归属网的H-PCRF向V-PCRF发送策略查询通知，V-PCRF收到策略查询通知后，向H-PCRF发起策略查询，H-PCRF收到V-PCRF的策略查询后，将改变的归属网策略发送给V-PCRF，V-PCRF根据收到的归属网策略对原有归属网策略进行更新；Or: the H-PCRF of the home network sends a policy query notification to the V-PCRF, and after receiving the policy query notification, the V-PCRF initiates a policy query to the H-PCRF, and after the H-PCRF receives the policy query from the V-PCRF, it will The changed home network policy is sent to the V-PCRF, and the V-PCRF updates the original home network policy according to the received home network policy;

或者为：归属网的用户签约数据库向V-PCRF发送策略查询通知，V-PCRF收到策略查询通知后，向用户签约数据库发起策略查询，用户签约数据库收到V-PCRF的策略查询后，将改变的归属网策略发送给V-PCRF，V-PCRF根据收到的归属网策略对原有归属网策略进行更新。Alternatively, the user subscription database of the home network sends a policy query notification to the V-PCRF. After the V-PCRF receives the policy query notification, it initiates a policy query to the user subscription database. After the user subscription database receives the V-PCRF policy query, it will The changed home network policy is sent to the V-PCRF, and the V-PCRF updates the original home network policy according to the received home network policy.

当应用信息改变时，该方法进一步包括：AF将改变的应用信息发送给V-PCRF；When the application information changes, the method further includes: the AF sends the changed application information to the V-PCRF;

则步骤B所述制定为：V-PCRF根据收到的改变的应用信息、获取的归属网策略及本地设置的拜访网策略，制定拜访网的策略和计费规则；Then step B is formulated as follows: V-PCRF formulates the policy and charging rules of the visited network according to the received changed application information, the obtained home network policy and the locally set visited network policy;

步骤B所述制定或者为：V-PCRF将收到的改变的应用信息发送给H-PCRF，H-PCRF根据V-PCRF发送来的应用信息及本地设置的归属网策略制定归属网的策略和计费规则，并将制定的策略和计费规则返回给V-PCRF，V-PCRF根据H-PCRF返回的策略和计费规则及本地设置的拜访网策略，制定拜访网的策略和计费规则。The formulating described in step B may be: V-PCRF sends the received changed application information to H-PCRF, and H-PCRF formulates the home network strategy and Charging rules, and return the formulated policies and charging rules to V-PCRF, and V-PCRF formulates the policies and charging rules of the visited network according to the policies and charging rules returned by H-PCRF and the locally set visited network policies .

本发明提供的漫游时的策略和计费控制系统主要包括：用户设备UE、接入网关AGW、拜访策略和计费规则功能V-PCRF、应用功能AF和归属网实体，其中，AF用于在收到V-PCRF发送的应用信息查询后向V-PCRF提供应用信息；归属网实体用于向V-PCRF提供归属网策略；V-PCRF用于通过向AF发送应用信息查询从AF得到应用信息，根据得到的应用信息、归属网策略及本地设置的拜访网策略，制定拜访网的策略和计费规则，并将制定的策略和计费规则发送给AGW；AGW用于根据收到的策略和计费规则，对UE执行策略和计费控制。The roaming policy and charging control system provided by the present invention mainly includes: user equipment UE, access gateway AGW, visit policy and charging rule function V-PCRF, application function AF and home network entity, wherein AF is used for Provide application information to V-PCRF after receiving application information query sent by V-PCRF; home network entity is used to provide home network policy to V-PCRF; V-PCRF is used to obtain application information from AF by sending application information query to AF , according to the obtained application information, the home network policy and the locally set visited network policy, formulate the policy and charging rules of the visited network, and send the formulated policy and charging rules to the AGW; the AGW uses the received policy and Charging rules implement policy and charging control on UEs.

其中，所述归属网实体为具有通知V-PCRF更新原有归属网策略功能的实体。Wherein, the home network entity is an entity having the function of notifying the V-PCRF to update the original home network policy.

所述AF为具有发送改变的应用信息给V-PCRF功能的实体。The AF is an entity with the function of sending the changed application information to the V-PCRF.

所述归属网实体为归属网的用户签约数据库、或为归属网的归属策略和计费规则功能H-PCRF。The home network entity is the subscriber subscription database of the home network, or the home policy and charging rule function H-PCRF of the home network.

由此可见，本发明中V-PCRF从UE归属网获取归属网策略后，可直接与AF进行信息交互，而不用再通过归属网的H-PCRF，有效减少了信令延时，从而提高了策略和计费控制过程的执行效率。It can be seen that, after the V-PCRF in the present invention obtains the home network policy from the UE home network, it can directly exchange information with the AF without going through the H-PCRF of the home network, which effectively reduces the signaling delay, thereby improving the Enforcement efficiency of policy and billing control process.

附图说明Description of drawings

图1为现有技术中的SBBC功能模型示意图；Fig. 1 is a schematic diagram of a SBBC functional model in the prior art;

图2为现有技术中漫游时的SBBC功能模型示意图；FIG. 2 is a schematic diagram of a SBBC function model during roaming in the prior art;

图3为现有技术中漫游时的策略和计费控制流程图；FIG. 3 is a flow chart of policy and charging control during roaming in the prior art;

图4为本发明中漫游时的SBBC功能模型示意图；Fig. 4 is a schematic diagram of the SBBC function model when roaming in the present invention;

图5为本发明实施例中漫游时的策略和计费控制流程图。FIG. 5 is a flow chart of policy and charging control during roaming in an embodiment of the present invention.

具体实施方式Detailed ways

为使本发明的目的、技术方案及优点更加清楚明白，下面参照附图并举实施例，对本发明作进一步详细说明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

本发明所提供方法的基本思想是：V-PCRF从UE所归属的归属网获取归属网策略，并在收到AF发送来的应用信息后，根据收到的应用信息、获取的归属网策略及本地设置的拜访网策略，制定拜访网的策略和计费规则，然后根据制定的策略和计费规则，对UE执行策略和计费控制。The basic idea of the method provided by the present invention is: V-PCRF obtains the home network strategy from the home network to which the UE belongs, and after receiving the application information sent by the AF, according to the received application information, the obtained home network strategy and Locally set the visited network policy, formulate the policy and charging rules of the visited network, and then implement policy and charging control on the UE according to the formulated policy and charging rules.

其中，V-PCRF可以从归属网的用户签约数据库获取归属网策略，或者从归属网的H-PCRF获取归属网策略。当V-PCRF从H-PCRF获取归属网策略时，如果H-PCRF中没有保存归属网策略，H-PCRF可以从用户签约数据库获取归属网策略，并将获取的归属网策略发送给V-PCRF。Wherein, the V-PCRF may obtain the home network policy from the user subscription database of the home network, or obtain the home network policy from the H-PCRF of the home network. When the V-PCRF obtains the home network policy from the H-PCRF, if the home network policy is not saved in the H-PCRF, the H-PCRF can obtain the home network policy from the user subscription database, and send the obtained home network policy to the V-PCRF .

参见图4所示，本发明所提供的系统主要包括：UE、AGW、V-PCRF、AF和归属网实体，其中，AF用于向V-PCRF提供应用信息；归属网实体用于向V-PCRF提供归属网策略；V-PCRF用于根据应用信息、归属网策略及拜访网策略，制定拜访网的策略和计费规则，并将制定的策略和计费规则发送给AGW；AGW用于根据收到的策略和计费规则，对UE执行策略和计费控制。Referring to Fig. 4, the system provided by the present invention mainly includes: UE, AGW, V-PCRF, AF and a home network entity, where the AF is used to provide application information to the V-PCRF; the home network entity is used to provide the V-PCRF with PCRF provides home network policies; V-PCRF is used to formulate visited network policies and charging rules based on application information, home network policies, and visited network policies, and sends the formulated policies and charging rules to AGW; AGW is used to Received policy and charging rules, execute policy and charging control on UE.

其中，所述归属网实体为归属网的用户签约数据库，或为归属网的H-PCRF。Wherein, the home network entity is a subscriber subscription database of the home network, or an H-PCRF of the home network.

下面结合图4所示系统，对本发明提供的方法进行详细阐述。参见图5所示，本实施例中漫游时的策略和计费控制过程主要包括以下几个步骤：The method provided by the present invention will be described in detail below in conjunction with the system shown in FIG. 4 . Referring to Fig. 5, the policy and charging control process during roaming in this embodiment mainly includes the following steps:

步骤501：UE向AGW发起业务请求；Step 501: UE initiates a service request to AGW;

步骤502：AGW收到来自UE的业务请求后，向V-PCRF发送SBBC授权查询，查询拜访网中与该UE相关的策略和计费规则；Step 502: After receiving the service request from the UE, the AGW sends an SBBC authorization query to the V-PCRF to query the policies and charging rules related to the UE in the visited network;

步骤503：V-PCRF收到来自AGW的授权查询后，向AF发送应用信息查询，查询UE所请求业务的相关信息；Step 503: After receiving the authorization query from the AGW, the V-PCRF sends an application information query to the AF to query the relevant information of the service requested by the UE;

步骤504：AF收到应用信息查询后，向V-PCRF返回应用信息；Step 504: After receiving the application information query, the AF returns the application information to the V-PCRF;

步骤505：V-PCRF根据收到的应用信息、获取的归属网策略、及本地设置的拜访网策略，制定拜访网的策略和计费规则；Step 505: V-PCRF formulates policies and charging rules for the visited network according to the received application information, the obtained home network policy, and the locally set visited network policy;

步骤506：V-PCRF将制定的策略和计费规则发送给AGW，作为SBBC授权响应；Step 506: V-PCRF sends the formulated policy and charging rules to the AGW as an SBBC authorization response;

步骤507：AGW根据收到的策略和计费规则，对用户设备UE执行策略和计费控制。Step 507: The AGW performs policy and charging control on the user equipment UE according to the received policy and charging rules.

另外，在步骤505中，如果V-PCRF不能够根据收到的应用信息制定策略和计费规则，则V-PCRF可以将收到的来自AF的应用信息转发给H-PCRF，H-PCRF根据应用信息及本地设置的归属网策略制定归属网的策略和计费规则，并将制定的策略和计费规则返回给V-PCRF，V-PCRF再根据H-PCRF发送来的策略和计费规则、及本地设置的拜访网策略，制定拜访网的策略和计费规则。In addition, instep 505, if the V-PCRF cannot formulate policies and charging rules according to the received application information, the V-PCRF can forward the received application information from the AF to the H-PCRF, and the H-PCRF can forward the received application information from the AF to the H-PCRF. Apply information and locally set home network policies to formulate home network policies and charging rules, and return the formulated policies and charging rules to V-PCRF, and V-PCRF will then use the policies and charging rules sent by H-PCRF , and the visited network strategy set locally, formulate the visited network strategy and charging rules.

当归属网策略改变时，比如由于用户取消某些业务、或增加某些业务、或用户信用等级改变而导致策略和计费规则改变时，归属网可以主动通知V-PCRF更新原有归属网策略。V-PCRF在归属网策略更新后，根据更新的归属网策略、及本地设置的拜访网策略和应用信息，制定拜访网的策略和计费规则。When the home network policy changes, for example, when the user cancels some services, or adds some services, or the user credit level changes, the policy and charging rules change, the home network can actively notify the V-PCRF to update the original home network policy . After the home network policy is updated, the V-PCRF formulates the policy and charging rules of the visited network according to the updated home network policy and the locally set visited network policy and application information.

其中，归属网通知V-PCRF更新原有归属网策略可采取以下几种方式：Among them, the home network notifies the V-PCRF to update the original home network policy in the following ways:

归属网的用户签约数据库将改变的归属网策略发送给V-PCRF，V-PCRF根据收到的归属网策略对原有归属网策略进行更新；The user subscription database of the home network sends the changed home network policy to the V-PCRF, and the V-PCRF updates the original home network policy according to the received home network policy;

或者，归属网的H-PCRF将改变的归属网策略发送给V-PCRF，V-PCRF根据收到的归属网策略对原有归属网策略进行更新；Or, the H-PCRF of the home network sends the changed home network policy to the V-PCRF, and the V-PCRF updates the original home network policy according to the received home network policy;

或者，归属网的H-PCRF向V-PCRF发送策略查询通知，通知V-PCRF更新信息，V-PCRF收到策略查询通知后，向H-PCRF发起策略查询，H-PCRF收到V-PCRF的策略查询后，将改变的归属网策略发送给V-PCRF，V-PCRF根据收到的归属网策略对原有归属网策略进行更新；Or, the H-PCRF of the home network sends a policy query notification to the V-PCRF to notify the V-PCRF of updating information. After receiving the policy query notification, the V-PCRF initiates a policy query to the H-PCRF, and the H-PCRF receives the V-PCRF After the policy query, the changed home network policy is sent to the V-PCRF, and the V-PCRF updates the original home network policy according to the received home network policy;

或者，归属网的用户签约数据库向V-PCRF发送策略查询通知，V-PCRF收到策略查询通知后，向用户签约数据库发起策略查询，用户签约数据库收到V-PCRF的策略查询后，将改变的归属网策略发送给V-PCRF，V-PCRF根据收到的归属网策略对原有归属网策略进行更新。Or, the user subscription database of the home network sends a policy query notification to the V-PCRF. After receiving the policy query notification, the V-PCRF initiates a policy query to the user subscription database. After the user subscription database receives the V-PCRF policy query, it will change The home network policy is sent to the V-PCRF, and the V-PCRF updates the original home network policy according to the received home network policy.

在图4所示的系统中，通知V-PCRF更新原有归属网策略的功能由归属网实体完成。In the system shown in Fig. 4, the function of notifying the V-PCRF to update the original home network policy is completed by the home network entity.

当应用信息改变时，比如会话相关参数改变，AF将改变的应用信息发送给V-PCRF，V-PCRF根据收到的改变的应用信息、及获取的归属网策略和本地设置的拜访网策略，制定拜访网的策略和计费规则。When the application information changes, such as session-related parameters change, the AF sends the changed application information to the V-PCRF, and the V-PCRF, according to the received changed application information, the obtained home network policy and the locally set visited network policy, Formulate policies and billing rules for the visited network.

如果V-PCRF不能够根据收到的应用信息制定策略和计费规则，则V-PCRF可以将收到的改变的应用信息发送给H-PCRF，H-PCRF根据V-PCRF发送来的应用信息及本地设置的归属网策略制定归属网的策略和计费规则，并将制定的策略和计费规则返回给V-PCRF，V-PCRF再根据H-PCRF返回的策略和计费规则及本地设置的拜访网策略，制定拜访网的策略和计费规则。If the V-PCRF cannot formulate policies and charging rules based on the received application information, the V-PCRF can send the received changed application information to the H-PCRF, and the H-PCRF can use the application information sent by the V-PCRF Formulate policies and charging rules for the home network, and return the formulated policies and charging rules to V-PCRF, and V-PCRF will then use the policies and charging rules returned by H-PCRF and local settings The visiting network strategy, formulate the visiting network strategy and billing rules.

可见，本发明中漫游时的策略和计费控制可以不通过归属网的H-PCRF进行，能够有效减少信令延时，从而提高策略和计费控制过程的执行效率。It can be seen that the policy and charging control during roaming in the present invention may not be performed through the H-PCRF of the home network, which can effectively reduce the signaling delay, thereby improving the execution efficiency of the policy and charging control process.

以上所述对本发明的目的、技术方案和有益效果进行了进一步的详细说明，所应理解的是，以上所述并不用以限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The purpose, technical solutions and beneficial effects of the present invention have been further described in detail above. It should be understood that the above description is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. shall be included in the protection scope of the present invention.

Claims (10)

1. a strategy and the billing control method when roaming is characterized in that, visit "Policy and Charging Rules Function V-PCRF obtains the home network strategy from the home network that user equipment (UE) belonged to, and this method may further comprise the steps:

After A, V-PCRF receive authorization query from access gateway AG W, by sending the application message inquiry to application function AF from the AF information that is applied;

B, V-PCRF formulate the strategy and the charging regulation of visit net according to the application message that obtains, the home network strategy that obtains and the local visit net strategy that is provided with, and the strategy that will formulate and charging regulation send to AGW;

C, AGW are according to strategy and the charging regulation received, to the UE implementation strategy and the control of chargeing.

2. method according to claim 1 is characterized in that, described V-PCRF obtains the home network strategy from home network and is: V-PCRF obtains the home network strategy from the user-subscribed database of home network;

Perhaps be: V-PCRF obtains the home network strategy from the ownership "Policy and Charging Rules Function H-PCRF of home network.

3. method according to claim 1, it is characterized in that, the described formulation of step B is: V-PCRF be applied information, obtain the home network strategy after, according to the application message that obtains, the home network strategy that obtains and the local visit net strategy that is provided with, formulate the strategy and the charging regulation of visit net;

Perhaps be: V-PCRF is applied after the information, the application message that obtains is sent to H-PCRF, the strategy and the charging regulation of application message that H-PCRF sends according to V-PCRF and the local home network policy development home network that is provided with, and the strategy that will formulate and charging regulation return to V-PCRF; V-PCRF formulates the strategy and the charging regulation of visit net according to strategy and charging regulation and the local visit net strategy that is provided with that H-PCRF returns.

4. method according to claim 1 is characterized in that, when angelica net strategy changed, this method further comprised: home network notice V-PCRF upgrades original home network strategy;

Then the described formulation of step B is: V-PCRF formulates the strategy and the charging regulation of visit net according to the home network strategy and the local visit net strategy that is provided with of the application message that obtains, renewal.

5. method according to claim 4 is characterized in that, described home network notice V-PCRF upgrades original home network strategy and is:

The user-subscribed database of home network sends to V-PCRF with the home network strategy that changes, and V-PCRF upgrades original home network strategy according to the home network strategy of receiving;

Perhaps be: the H-PCRF of home network sends to V-PCRF with the home network strategy that changes, and V-PCRF upgrades original home network strategy according to the home network strategy of receiving;

Perhaps be: the H-PCRF of home network sends the policy lookup notice to V-PCRF, after V-PCRF receives the policy lookup notice, initiate policy lookup to H-PCRF, after H-PCRF receives the policy lookup of V-PCRF, the home network strategy that changes is sent to V-PCRF, and V-PCRF upgrades original home network strategy according to the home network strategy of receiving;

Perhaps be: the user-subscribed database of home network sends the policy lookup notice to V-PCRF, after V-PCRF receives the policy lookup notice, initiate policy lookup to user-subscribed database, after user-subscribed database is received the policy lookup of V-PCRF, the home network strategy that changes is sent to V-PCRF, and V-PCRF upgrades original home network strategy according to the home network strategy of receiving.

6. method according to claim 1 is characterized in that, when application message changed, this method further comprised: AF sends to V-PCRF with the application message that changes;

Then the described formulation of step B is: V-PCRF formulates the strategy and the charging regulation of visit net according to the application message of the change of receiving, the home network strategy that obtains and the local visit net strategy that is provided with;

The described formulation of step B or be: the application message of the change that V-PCRF will receive sends to H-PCRF, the strategy and the charging regulation of application message that H-PCRF sends according to V-PCRF and the local home network policy development home network that is provided with, and the strategy that will formulate and charging regulation return to V-PCRF, V-PCRF formulates the strategy and the charging regulation of visit net according to strategy and charging regulation and the local visit net strategy that is provided with that H-PCRF returns.

7. a strategy and charging control system when roaming is characterized in that this system comprises: user equipment (UE), access gateway AG W, visit "Policy and Charging Rules Function V-PCRF, application function AF and home network entity,

Wherein, AF is used for receiving that the application message inquiry back that V-PCRF sends provides application message to V-PCRF;

The home network entity is used for providing the home network strategy to V-PCRF;

V-PCRF is used for by sending the application message inquiry to AF from the AF information that is applied, according to the application message that obtains, home network strategy and the local visit net strategy that is provided with, formulate the strategy and the charging regulation of visit net, and the strategy that will formulate and charging regulation send to AGW;

AGW is used for according to strategy and the charging regulation received, to the UE implementation strategy and the control of chargeing.

8. system according to claim 7 is characterized in that, described home network entity is to have the entity that notice V-PCRF upgrades original home network policing feature.

9. system according to claim 7 is characterized in that, described AF has the entity of the application message of the change of sending to the V-PCRF function.

10. according to claim 7 or 8 described systems, it is characterized in that the user-subscribed database that described home network entity is a home network or be the ownership "Policy and Charging Rules Function H-PCRF of home network.

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