WO2011026385A1 - 一种本地疏导漫游场景在线计费的方法和系统 - Google Patents

一种本地疏导漫游场景在线计费的方法和系统 Download PDF

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Publication number
WO2011026385A1
WO2011026385A1 PCT/CN2010/075395 CN2010075395W WO2011026385A1 WO 2011026385 A1 WO2011026385 A1 WO 2011026385A1 CN 2010075395 W CN2010075395 W CN 2010075395W WO 2011026385 A1 WO2011026385 A1 WO 2011026385A1
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ocs
credit
visited network
control decision
credit control
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PCT/CN2010/075395
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English (en)
French (fr)
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周晓云
郭文洁
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中兴通讯股份有限公司
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Publication of WO2011026385A1 publication Critical patent/WO2011026385A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications

Definitions

  • the present invention relates to the field of communications, and in particular, to an online charging method and system in an Evolved Packet System (abbreviated as EPS) Local Breaking (LBO) roaming scenario.
  • EPS Evolved Packet System
  • LBO Local Breaking
  • Local grooming means that the service data used by the user in the roaming situation is directly transmitted to the destination via the visited network without being routed back to the network from the visited network, and then transmitted to the destination via the gateway of the home network.
  • the locally groomed service is handled directly by the visited place, and there is no need to use the route between the home network and the visited network. This method can not only ensure a good user experience, but also reduce operating costs by saving bandwidth between different operators' networks.
  • PCC Policy and Charging Control
  • 3GPP 3rd Generation Partnership Project
  • An Application Function (AF) entity provides access points for business applications.
  • the network resources used by these business applications require dynamic policy control.
  • the AF sends the related service information to the Policy and Charging Rules Function (PCRF) entity. If the service information is consistent with the policy of the PCRF entity, the PCRF entity accepts the negotiation; otherwise, the PCRF entity rejects the negotiation and simultaneously gives the business parameters acceptable to the PCRF entity in the feedback. The AF can then return these parameters to the User Equipment (UE).
  • UE User Equipment
  • the interface between AF and PCRF is the Rx interface.
  • the PCRF entity is the core of the PCC (including the Home Network PCRF (H-PCRF) entity and the Visiting Network PCRF (V-PCRF) entity), which is responsible for policy decision making and charging rules.
  • the PCRF provides network control rules based on service data flows, including traffic data flow detection, Gating Control, and Quality of Service (QoS) control. And data flow based charging rules.
  • the PCRF entity sends its policy and charging rules to the Policy and Control Enforcement Function (PCEF) entity for execution. At the same time, the PCRF entity also needs to ensure that these rules are consistent with the user's subscription information.
  • the basis for formulating policies and charging rules for the PCRF entity includes: obtaining information related to the service from the AF; obtaining subscription information with the user policy charging control from the Subscription Profile Repository (SPR); obtaining and carrying from the PCEF entity Information about related networks.
  • SPR Subscription Profile Repository
  • the PCEF entity is usually located in the gateway (GateWay, GW for short) and performs the policy and charging rules defined by the PCRF on the bearer plane.
  • the PCEF entity detects the service data flow according to the service data flow filter in the rule sent by the PCRF entity, and then performs the policy and charging rules formulated by the PCRF for the service data flow.
  • the PCEF entity performs QoS authorization according to the rules sent by the PCRF entity, and performs gate control according to the execution of the AF entity.
  • the charging rule sent by the PCRF the PCEF entity performs a corresponding service data flow charging operation, and the charging can be either online charging or offline charging.
  • PCEF entity In the case of online charging, the PCEF entity needs to perform credit management with the Online Charging System (OCS). During offline charging, the PCEF entity and the Offline Charging System (OFCS) exchange the relevant charging information.
  • the interface between the PCEF entity and the PCRF entity is a Gx interface
  • the interface with the OCS is a Gy interface
  • the interface with the OFCS is a Gz interface.
  • PCEFs are generally located on the gateway of the network, such as the GPRS Gateway Support Node (GGSN) in GPRS and the Packet Data Gateway (PDG) in I-WLAN.
  • GGSN GPRS Gateway Support Node
  • PDG Packet Data Gateway
  • Bearer Binding and Event Reporting Function entity. Its functions include bearer binding, authentication of upstream bearer bindings, and event reporting.
  • the BBER entity F is located at the S-GW, and when the UE accesses through the trusted non-3GPP access system, the BBERF entity The BBERF entity is located in an Evolved Packet Data Gateway (ePDG) when the UE accesses the untrusted non-3GPP access system. At this time, the PCEF entity no longer performs the bearer binding function.
  • ePDG Evolved Packet Data Gateway
  • the User Contracting Database stores user policy charging control subscription information related to policy control and charging.
  • the interface between SPR and PCRF is the Sp interface.
  • OCS Online charging system
  • PCEF PCEF entity
  • the offline charging system works with the PCEF entity to perform the charging operation in the offline charging mode.
  • the PCEF entity is located in the Visiting Public Land Mobile Network (VIP), and the policy and charging rule information is transmitted from the home network PCRF (ie, H-PCRF) entity to the S9 interface.
  • the PCRF (ie V-PCRF) entity of the visited network is then transmitted to the PCEF entity located in the visited network through the Gx interface, and to the BBERF located in the visited network through the Gxx interface.
  • the PCEF of the visited network is connected to the OFCS (Offline Charging System) of the visited network through the Gz interface, and is connected to the OCS (Online Charging System) of the home network through the Gy interface.
  • OFCS Offline Charging System
  • V-OCS visited network online charging system
  • H-OCS home network online charging system
  • V-OCS only has the function of message forwarding, and cannot perform online credit control and management on the user according to the local policy of the visited network, and all the policies are from the home network.
  • V-OCS only has the function of message forwarding, and cannot be online according to the local policy of the visited network.
  • the present invention provides a method for locally charging online charging of a roaming scenario, including:
  • the visited network online charging system (V-OCS) is based on the visited network.
  • the policy modifies the credit control decision issued by the home network online charging system (H-OCS), and then sends the modified credit control decision to the policy and charging execution function (PCEF) entity; and the PCEF entity executes The modified credit control decision.
  • H-OCS home network online charging system
  • PCEF policy and charging execution function
  • the steps for the V-OCS to modify the credit control decision issued by the H-OCS according to the visited network policy include:
  • the V-OCS authorizes credits according to a visited network policy.
  • the steps for the V-OCS to modify the credit control decision issued by the H-OCS according to the visited network policy include:
  • the V-OCS increases a credit re-authorization trigger of the visited network
  • the V-OCS uses the credit re-authorization of the visited network to trigger the replacement of the H-OCS. Credit reauthorization triggered.
  • the steps for the V-OCS to modify the credit control decision issued by the H-OCS according to the visited network policy include:
  • the V-OCS replaces the termination action sent by the H-OCS with the termination action of the visited network according to the visited network policy.
  • the method further includes: the V-OCS notifying the modified credit control decision to the H-OCS.
  • the present invention also provides a system for locally charging online charging of a roaming scene, including a V-OCS, an H-OCS, and a PCEF entity.
  • the V-OCS is configured to modify the credit control decision issued by the H-OCS according to the visited network policy, and then send the modified credit control decision to the PCEF entity;
  • the PCEF entity is configured to: execute the modified credit control decision.
  • the above system can also have the following characteristics:
  • the V-OCS is configured to modify the credit control decision issued by the H-OCS according to the visited network policy in the following manner: Authorize the credit according to the visited network policy.
  • the V-OCS is configured to modify the credit control decision issued by the H-OCS according to the visited network policy in the following manner: if the credit re-authorization trigger of the H-OCS subscription does not include a credit re-authorization trigger that needs to be subscribed , the credit re-authorization trigger of the visited network is increased; and if the credit re-authorization triggered by the H-OCS subscription does not have a credit re-authorization trigger that needs to be subscribed, the credit re-authorization of the visited network is used to trigger the replacement of the H-OCS. Credit reauthorization triggered.
  • the V-OCS is configured to modify the credit control decision issued by the H-OCS according to the visited network policy in the following manner: the termination action sent by the H-OCS is replaced by the termination action of the visited network according to the visited network policy.
  • the V-OCS is further configured to: after modifying the credit control decision issued by the H-OCS according to the visited network policy, notify the H-OCS of the modified credit control decision.
  • the invention can implement the local policy of the visited network on the online credit control and management of the user, and can realize the coordination work of the online charging system of the visited network and the online charging system of the home network.
  • Figure 1 is a diagram of the local LBO logic architecture
  • Figure 2 is a local grooming LBO logical architecture that considers OCS interactions
  • FIG. 4 is a diagram of a credit control embodiment in the IP-CAN session modification process of the present invention.
  • the present invention proposes that during the online charging in the LBO roaming scenario of the EPS, during the IP Connectivity Access Network (IP-CAN) session, the V-OCS is under the H-OCS according to the visited network policy. After the modified credit control decision is modified, it is sent to the PCEF; the PCEF executes the modified credit control decision.
  • IP-CAN IP Connectivity Access Network
  • This embodiment describes the V-OCS and H-OCS interaction process, and the V-OCS and H-OCS credit control decisions during the IP-CAN session establishment process. Specific steps are as follows:
  • the gateway GW/PCEF entity located in the visited network receives the establishment of an IP-CAN session request message sent by the UE, and the gateway accepts the request and allocates an IP address to the UE;
  • the GW/PCEF entity sends an IP-CAN session establishment indication message to the visited PCRF (V-PCRF) entity, where the message carries the user identifier NAI (Network Access Identifier) and the PDN (Packet Data Network, packet) Data network) identifies the APN (Access Point Name);
  • V-PCRF Visit PCRF
  • NAI Network Access Identifier
  • PDN Packet Data Network, packet
  • APN Access Point Name
  • the V-PCRF entity determines, according to the NAI, that the user is a roaming user, and the attribution to the user
  • the PCRF ie, H-PCRF entity sends an IP-CAN session establishment indication message
  • S305 The SPR returns an acknowledgement message, where the message carries information such as whether online charging is required.
  • S306 The H-PCRF entity performs authorization and policy determination according to user subscription, network policy, and bearer attribute, and formulates a PCC rule, and determines to IP-CAN performs online charging.
  • the PCC rule includes a Charging Key, and optionally includes a Service Identifier, a Charging Method (here, online charging), and a Measurement Method (such as traffic). , duration, events, and flow/time combination);
  • the H-PCRF entity sends an IP-CAN session establishment confirmation message to the V-PCRF entity, where the message carries the PCC rule and the OCS identifier of the home network supporting the online charging, such as: a primary OCS address and backup of the home network.
  • OCS address information the specific definition is not limited here; Authorization; wherein, the V-PCRF entity may modify the issued PCC rule;
  • the V-PCRF entity sends an IP-CAN session establishment confirmation message to the GW/PCEF entity, where the message carries the identifier of the H-OCS and the V-PCRF entity is the identifier of the V-OCS selected by the IP-CAN session, and the PCC Rule
  • the GW/PCEF entity sends a credit control request message to the V-OCS to request a credit (Credit) for each Charging Key of the activated PCC rule, due to online charging, and at least one PCC rule is activated.
  • the message also carries the H-OCS identifier;
  • V-OCS sends a credit control request message requesting credit to the H-OCS
  • H-OCS performs a home credit decision. H-OCS performs Credit authorization for each requested Charging key according to the network policy. If the H-OCS finds that the user has run out of credit, the authorization will be denied. In addition, the H-OCS will subscribe to the credit re-authorization triggers for each requested Charging Key according to the network policy and the Termination Action when the final granted unit is exhausted;
  • V-OCS saves the credit control decision issued by the H-OCS.
  • V-OCS sets the credit control decision of the visited network according to the visited network policy;
  • it may include:
  • V-OCS authorizes Credit according to the local policy (ie, visiting network policy);
  • the credit re-authorization triggers delivered by the H-OCS do not include the radio access type change (RAT_Type_Change), and the V-OCS determines the RAT_Type according to the visited network policy. Change, then V-OCS will be Add RAT_Type_Change to the credit control response message sent to the GW/PCEF entity.
  • RAT_Type_Change the radio access type change
  • the V-OCS determines that a serving cell change (Serving-Cell-Change) is required according to the visited network policy, due to Serving-Cell – Change is more accurate than Serving-Area-Change, so V-OCS will replace Serving-Area-Change with Serving-Cell-Change in the GW/PCEF.
  • a serving cell change Serving-Cell-Change
  • the V-OCS will decide whether to follow the Termination Action delivered by the H-OCS according to the visited network policy, or replace it with the Termination Action of the visited network.
  • the V-OCS further informs the H-OCS of the modified credit control decision
  • V-OCS returns a credit control response message to the GW/PCEF entity, and carries the credit control decision modified by the V-OCS in the message;
  • the GW/PCEF entity returns to establish an IP-CAN session response message, and the PCEF performs the received modified credit control decision. For example, when the credit authorized in the credit control decision is used up, the PCEF initiates a credit control request message requesting Credit; when the credit re-authorization triggers condition subscribed in the credit control decision is satisfied, the PCEF entity initiates a credit control request message requesting Credit; When there is no new Credit authorization, the PCEF entity will perform the final action.
  • This embodiment describes the V-OCS and H-OCS interaction flow, and the V-OCS and H-OCS credit control decisions in the process of establishing the IP-CAN session modification as in the procedure of Embodiment 1. Specific steps:
  • the gateway located in the visited network GW/PCEF entity receives the triggering decision to initiate the IP-CAN session modification process.
  • the trigger is a radio access type (RAT Type) caused by a handover of the user, and a service area (Serving Area) or a serving cell (Serving Cell) is changed;
  • RAT Type radio access type
  • S402 The GW/PCEF entity sends an IP-CAN session modification indication message to the visited PCRF (V-PCRF) entity, and carries the current bearer information.
  • S403 The V-PCRF entity sends an IP-CAN session modification indication message to the H-PCRF entity.
  • the SPR returns an acknowledgement message, and carries the user subscription information.
  • S406 The H-PCRF re-establishes the PCC rule according to the authorization and policy decision of the user subscription, the network policy, and the bearer attribute.
  • the H-PCRF entity sends an IP-CAN session modification confirmation message to the V-PCRF entity, where the message carries the modified PCC rule; authorization.
  • the V-PCRF entity may be modified;
  • the V-PCRF entity sends an IP-CAN session modification confirmation message to the GW/PCEF entity, where the message carries the identifier of the H-OCS and the V-PCRF entity is the identifier of the V-OCS selected by the IP-CAN session.
  • the GW/PCEF entity in the first embodiment is subscribed to the RAT-Type-Chang and the Serving-Cell-Change Credit re-authorization triggers.
  • the GW/PCEF sends a credit control request to the V-OCS, and reports the current remaining Credit of each Charging Key of the RAT_Type_Chang-Chang-Cell-Cell-Change and the current RAT Type and the cell identifier Cell Id where the current UE is located;
  • V-OCS will be re-authorized according to the local policy, and V-OCS will execute S412. If the trigger in 401 is Serving_Cell-Change, the V-OCS will further determine whether the current Serving Area of the UE has changed. If not, the V-OCS will perform re-authorization according to the local policy, and the V-OCS performs S412. If the change occurs, then execute S413;
  • V-OCS returns a credit control response message to the GW/PCEF entity, and carries the V-OCS re-authorization credit control decision, and no further steps are performed;
  • V-OCS sends a credit control request message to the H-OCS, and reports the current remaining credits of the respective Charging Keys of the Serving_Area-Change and the current Serving Area.
  • the H-OCS performs a home credit decision.
  • the H-OCS performs a Credit reauthorization for each requested Charging key according to the network policy. If the H-OCS finds that the user has used up its credit, it will reject the authorization;
  • V-OCS The V-OCS sets the credit control decision of the visited network according to the visited network policy.
  • V-OCS returns a credit control response message to the GW/PCEF entity, and carries the credit control decision modified by the V-OCS in the message;
  • the GW/PCEF entity returns an IP-CAN session response message, and the PCEF entity performs the received modified credit control decision. For example, when the credit authorized in the credit control decision is used up, the PCEF entity initiates a credit control request message requesting Credit; when the credit re-authorization triggers condition subscribed in the credit control decision is satisfied, the PCEF entity initiates a credit control request message, requesting Credit When there is no new Credit authorization, the PCEF entity will perform the final action.
  • the system for online charging of local roaming scenarios in the embodiment of the present invention includes V-OCS, H-OCS, and PCEF entities.
  • the V-OCS is used to modify the credit control decision issued by the H-OCS according to the visited network policy, and then sent to the PCEF entity;
  • the PCEF entity is configured to perform the modified credit control decision.
  • the V-OCS is further used to authorize credits according to a visited network policy.
  • the V-OCS is further configured to: if a credit re-authorization trigger of the H-OCS subscription does not include a credit re-authorization trigger that needs to be subscribed, increase a credit re-authorization trigger of the visited network; and the V-OCS is further used for If the credit re-authorization triggered by the H-OCS subscription does not require a high credit re-authorization trigger, the credit re-authorization triggered by the H-OCS is triggered by the credit re-authorization of the visited network.
  • the V-OCS is further used to replace the termination action of the visited network according to the visited network policy.
  • the final action issued by H-OCS is further used to replace the termination action of the visited network according to the visited network policy.
  • the V-OCS is further configured to modify the credit control decision issued by the H-OCS according to the visited network policy, and then notify the H-OCS of the modified credit control decision.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software.
  • the present invention can implement the local policy of the visited network on the online credit control and management of the user, and can realize the coordination work of the online charging system of the visited network and the online charging system of the home network.

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Abstract

本发明公开了一种本地疏导漫游场景在线计费的方法和系统，该方法包括：在演进的分组系统的本地疏导漫游场景中使用在线计费时，IP-CAN会话过程中，V-OCS根据拜访网络策略对H-OCS下发的信用控制决策进行修改，再将修改后的信用控制决策下发给PCEF实体； 以及所述PCEF实体执行所述修改后的信用控制决策。本发明能够将拜访网络的本地策略实施于用户的在线信用控制和管理，并能够实现拜访网络在线计费系统和归属网络在线计费系统的协调工作。

Description

一种本地疏导漫游场景在线计费的方法和系统
技术领域
本发明涉及通信领域， 尤其涉及一种演进的分组系统（Evolved Packet System, 简称为 EPS )本地疏导（ Local BreakOut, 简称为 LBO )漫游场景下 的在线计费方法和系统。
背景技术
本地疏导是指用户在漫游情况下使用的业务数据直接经拜访网络传送给 目的地， 而无需从拜访网络路由回归属网络， 再经由归属网络的网关传送给 目的地。 本地疏导的业务由拜访地直接处理， 不需要使用归属网络和拜访网 络之间的路由。 这种方式不但可以保证用户良好的体验， 而且通过节约不同 运营商网间的带宽， 能够降低运营成本。
在当前的第三代合作伙伴计戈 ( 3rd Generation Partnership Project, 简称 为 3GPP )无线通信标准组织中定义的 R8的 EPS本地疏导场景中使用的策略 和计费控制 （Policy and Charging Control, 简称为 PCC ) 架构如图 1所示。
应用功能（Application Function, 简称为 AF ) 实体， 提供业务应用的接 入点， 这些业务应用所使用的网络资源需要进行动态的策略控制。 在业务面 进行参数协商时， AF将相关业务信息传递给策略控制与计费规则功能（ Policy and Charging Rules Function, 简称为 PCRF )实体。如果这些业务信息与 PCRF 实体的策略相一致，则 PCRF实体接受该协商；否则， PCRF实体拒绝该协商， 并在反馈中同时给出 PCRF实体可接受的业务参数。 随后， AF可将这些参数 返回给用户设备（User Equipment, 简称为 UE )。 其中， AF和 PCRF之间的 接口是 Rx接口。
PCRF实体是 PCC的核心（图中包括归属网络 PCRF ( H-PCRF ) 实体和 拜访网络 PCRF ( V-PCRF )实体）， 负责策略决策和计费规则的制定。 PCRF 提供了基于业务数据流的网络控制规则， 这些网络控制包括业务数据流的检 测、 门控（ Gating Control ) 、 服务质量（ Quality of Service , 简称为 QoS )控 制以及基于数据流的计费规则等。 PCRF实体将其制定的策略和计费规则发送 给策略和计费执行功能 （Policy and Control Enforcement Function, 简称为 PCEF ) 实体执行， 同时， PCRF实体还需要保证这些规则和用户的签约信息 一致。 PCRF实体制定策略和计费规则的依据包括： 从 AF获取与业务相关的 信息； 从用户签约数据库（Subscription Profile Repository, 简称为 SPR )获取 与用户策略计费控制签约信息； 从 PCEF实体获取与承载相关网络的信息。
PCEF实体通常位于网关（ GateWay,简称为 GW )内，在承载面执行 PCRF 所制定的策略和计费规则。 PCEF实体按照 PCRF实体所发送的规则中的业务 数据流过滤器对业务数据流进行检测， 进而对这些业务数据流执行 PCRF所 制定的策略和计费规则。在承载建立时， PCEF实体按照 PCRF实体发送的规 则进行 QoS授权， 并根据 AF实体的执行进行门控控制。 根据 PCRF发送的 计费规则， PCEF实体执行相应的业务数据流计费操作，计费既可以是在线计 费， 也可以是离线计费。 如果是在线计费， 则 PCEF 实体需要和在线计费系 统（ Online Charging System, 简称为 OCS ) —起进行信用管理。 离线计费时， PCEF实体和离线计费系统（ Offline Charging System, 简称为 OFCS )之间交 换相关计费信息。 PCEF实体与 PCRF实体之间的接口是 Gx接口， 与 OCS 之间的接口是 Gy接口， 与 OFCS之间的接口是 Gz接口。 PCEF—般都位于 网络的网关上， 如 GPRS中的 GPRS 网关支持节点 （GGSN ) 以及 I-WLAN 中的分组数据网关 （ Packet Data Gateway, 简称为 PDG ) 。
承载绑定和事件报告功能 ( Bearer Binding and Event Reporting Function, 简称为 BBERF ) 实体。 其功能包括承载绑定、 上行承载绑定的验证、 以及事 件报告。 当 UE通过 E-UTRAN接入， 并且 S-GW与 P-GW之间釆用 PMIPv6 协议时， BBER实体 F就位于 S-GW, 当 UE通过可信任非 3GPP接入系统接 入时， BBERF实体位于可信任非 3GPP接入网关，当 UE通过不可信任非 3GPP 接入系统接入时、 BBERF实体位于演进的分组数据网关（ Evolved Packet Data Gateway, 简称为 ePDG ) 。 此时， PCEF实体不再执行承载绑定功能。
用户签约数据库 （SPR )存储了和策略控制与计费相关的用户策略计费 控制签约信息。 SPR和 PCRF之间的接口是 Sp接口。
在线计费系统（OCS )和 PCEF 实体一起进行在线计费方式下用户信用 的控制和管理。
离线计费系统（OFCS )与 PCEF实体一起完成离线计费方式下的计费操 作。
在本地疏导漫游场景下， PCEF实体位于拜访网络 VPLMN ( Visit Public Land Mobile Network, 拜访公共陆上移动网） ， 策略和计费规则信息通过 S9 接口从归属网络 PCRF (即 H-PCRF ) 实体传递到拜访网络的 PCRF (即 V-PCRF ) 实体， 然后再通过 Gx接口传递给位于拜访网络的 PCEF实体， 以 及， 通过 Gxx接口传递给位于拜访网络的 BBERF。 拜访网络的 PCEF通过 Gz接口连接到拜访网络的 OFCS ( Offline Charging System, 离线计费系统 ) , 通过 Gy接口连接到归属网络的 OCS ( Online Charging System, 在线计费系 统） 。
对于本地输导漫游场景下的在线计费问题，现有技术还没有深入的研究。 仅提出了一个基本框架， 如图 2所示。 在拜访网络存在拜访网络在线计费系 统（V-OCS ) , 负责将归属网络在线计费系统（H-OCS ) 下发的信用控制策 略下发给拜访网络 PCEF实体。同时将 PCEF实体上报的在线计费信息上报给 H-OCS。
现有技术的缺陷是， V-OCS只具有消息转发的功能， 而不能根据拜访网 络的本地策略对用户进行在线的信用控制和管理， 所有的策略均来自归属网 络。 发明内容
本发明要解决的技术问题就是提出一种本地疏导漫游场景在线计费的方 法和系统， 解决现有技术中 V-OCS只具有消息转发的功能， 而不能根据拜访 网络的本地策略对用户进行在线的信用控制和管理的问题。
为了解决上述技术问题， 本发明提供一种本地疏导漫游场景在线计费的 方法， 包括：
在演进的分组系统的本地疏导漫游场景中使用在线计费时， IP连接接入 网 （IP-CAN )会话过程中， 拜访网络在线计费系统（V-OCS )根据拜访网络 策略对归属网络在线计费系统（H-OCS ) 下发的信用控制决策进行修改， 再 将修改后的信用控制决策下发给策略和计费执行功能（PCEF ) 实体； 以及 所述 PCEF实体执行所述修改后的信用控制决策。
所述 V-OCS根据拜访网络策略对 H-OCS下发的信用控制决策进行修改 的步骤包括：
所述 V-OCS根据拜访网络策略授权信用。
所述 V-OCS根据拜访网络策略对 H-OCS下发的信用控制决策进行修改 的步骤包括：
若所述 H-OCS订阅的信用重授权触发中没有包含所述 V-OCS需要订阅 的信用重授权触发， 则所述 V-OCS增加拜访网络的信用重授权触发；
若所述 H-OCS订阅的信用重授权触发的精度级别没有所述 V-OCS需要 订阅的信用重授权触发高，则所述 V-OCS用拜访网络的信用重授权触发替换 H-OCS下发的信用重授权触发。
所述 V-OCS根据拜访网络策略对 H-OCS下发的信用控制决策进行修改 的步骤包括：
所述 V-OCS根据拜访网络策略，用拜访网络的终结动作替换所述 H-OCS 下发的终结动作。
所述 V-OCS根据拜访网络策略对 H-OCS下发的信用控制决策进行修改 的步骤之后， 上述方法还包括： 所述 V-OCS将修改后的信用控制决策告知给 所述 H-OCS。
为了解决上述技术问题， 本发明还提供一种本地疏导漫游场景在线计费 的系统， 包括 V-OCS、 H-OCS和 PCEF实体，
所述 V-OCS设置为：在 IP-CAN会话过程中，根据拜访网络策略对 H-OCS 下发的信用控制决策进行修改， 再将修改后的信用控制决策下发给 PCEF 实 体；
所述 PCEF实体设置为： 执行所述修改后的信用控制决策。
上述系统还可具有以下特点： 所述 V-OCS是设置为以如下方式根据拜访网络策略对 H-OCS下发的信 用控制决策进行修改： 根据拜访网络策略授权信用。
上述系统还可具有以下特点：
所述 V-OCS是设置为以如下方式根据拜访网络策略对 H-OCS下发的信 用控制决策进行修改：若所述 H-OCS订阅的信用重授权触发中没有包含需要 订阅的信用重授权触发， 则增加拜访网络的信用重授权触发； 以及 若 H-OCS 订阅的信用重授权触发的精度级别没有需要订阅的信用重授 权触发高，则用拜访网络的信用重授权触发替换 H-OCS下发的信用重授权触 发。
上述系统还可具有以下特点：
所述 V-OCS是设置为以如下方式根据拜访网络策略对 H-OCS下发的信 用控制决策进行修改:根据拜访网络策略，用拜访网络的终结动作替换 H-OCS 下发的终结动作。
上述系统还可具有以下特点：
所述 V-OCS还设置为： 根据拜访网络策略对 H-OCS下发的信用控制决 策进行修改后， 将修改后的信用控制决策告知给所述 H-OCS。
本发明能够将拜访网络的本地策略实施于用户的在线信用控制和管理， 并能够实现拜访网络在线计费系统和归属网络在线计费系统的协调工作。
附图说明
图 1是本地疏导 LBO逻辑架构图；
图 2是考虑 OCS交互的本地疏导 LBO逻辑架构；
图 3是本发明的 IP-CAN会话建立过程中的信用控制实施例；
图 4是本发明的 IP-CAN会话修改过程中的信用控制实施例。
具体实施方式 本发明提出， 在 EPS的 LBO漫游场景中使用在线计费时， IP连接接入 网 （IP Connectivity Access Network, 简称为 IP-CAN )会话过程中， V-OCS 根据拜访网络策略对 H-OCS 下发的信用控制决策进行修改后， 再下发给 PCEF; 所述 PCEF执行所述修改后的信用控制决策。
下面结合附图及具体实施例对本发明进行详细说明。
实施例一
本实施例描述了在 IP-CAN会话建立过程中， V-OCS与 H-OCS交互流程， 以及 V-OCS和 H-OCS信用控制决策。 具体步骤如下：
S301 : 位于拜访网络的网关 GW/PCEF实体收到 UE发送的建立 IP-CAN 会话请求消息， 该网关接受请求并为 UE分配 IP地址；
S302: GW/PCEF实体向拜访地 PCRF ( V-PCRF )实体发送 IP-CAN会话 建立指示消息， 消息中携带用户标识 NAI ( Network Access Identifier , 网络接 入标识符 )以及 PDN( Packet Data Network,分组数据网络 )标识 APN( Access Point Name, 接入点名 ) ；
S303: V-PCRF实体根据 NAI判断用户为漫游用户， 并向用户的归属地
PCRF (即 H-PCRF ) 实体发送 IP-CAN会话建立指示消息；
S304: 如果 H-PCRF并没有相关的用户签约信息， 就发送签约数据请求 给 SPR ( Subscription Profile Repository, 签约特征资料库）来获取；
S305: SPR返回确认消息， 消息中携带在线计费是否是必需的等信息； S306: H-PCRF 实体根据用户签约、 网络策略、 承载属性等进行授权和 策略决定， 制定 PCC规则， 并决定对该 IP-CAN进行在线计费。 其中 PCC规 则中包含计费键 ( Charging Key ) , 可选的还包括业务标识符 （ Service Identifier ) 、 计费方法 （Charging method ) (这里为在线计费）和度量方法 ( Measurement method ) (如流量、 时长、 事件以及流量 /时长组合） ；
S307: H-PCRF实体向 V-PCRF实体发送 IP-CAN会话建立确认消息， 消 息中携带 PCC规则以及支持在线计费的归属网络的 OCS标识， 如： 归属网 络的某个主用 OCS地址和备用 OCS地址信息， 具体的定义方式此处不做限 定； 授权； 其中， V-PCRF实体可能修改该下发的 PCC规则；
S309: V-PCRF实体向 GW/PCEF实体发送 IP-CAN会话建立确认消息， 消息中携带 H-OCS的标识和 V-PCRF实体为该 IP-CAN会话所选择的 V-OCS 的标识， 以及 PCC规则；
S310: 由于釆用在线计费， 且至少有一个 PCC规则被激活， GW/PCEF 实体向 V-OCS发送信用控制请求消息为激活的 PCC规则的每个 Charging Key 请求信用 （Credit ) 。 消息中还携带 H-OCS标识；
S311 : V-OCS向 H-OCS发送信用控制请求消息请求 Credit;
S312: H-OCS进行归属地信用决策。 H-OCS根据网络策略为每一个请求 的 Charging key进行 Credit授权。 若 H-OCS发现用户 Credit已用完， 将拒绝 授权。 此外， H-OCS将根据网络策略为每一个请求的 Charging Key订阅信用 重授权触发 ( Credit re-authorization triggers ) 以及最后授权单元 ( final granted unit )耗尽时的终结动作 ( Termination Action ) ；
S313: H-OCS向 V-OCS返回信用控制响应消息， 消息中携带 S312步的 信用控制决策；
S314: V-OCS保存 H-OCS下发的信用控制决策。 V-OCS根据拜访网络 策略设置拜访网络的信用控制决策；
具体可以包括：
( 1 )对于 Credit, V-OCS根据本地策略（即拜访网络策略 )授权 Credit;
( 2 ) 对于 Credit re-authorization triggers： 若 H-OCS 定阅的 Credit re-authorization triggers中没有包含 V-OCS需要订阅的 Credit re-authorization triggers, 那么 V-OCS将增力口拜访网络的 Credit re-authorization triggers„ 若 H-OCS订阅的 Credit re-authorization triggers的精度级别没有 V-OCS需要订阅 的高，那么 V-OCS将用拜访网络的 Credit re-authorization triggers替换 H-OCS 下发的 Credit re-authorization triggers。 具体地 ¾口果 H-OCS 下发的 Credit re-authorization triggers中没有包含无线接入类型改变（ RAT— Type— Change ) , 而 V-OCS根据拜访网络策略决定需要 RAT— Type— Change, 那么 V-OCS将在 发送给 GW/PCEF实体的信用控制响应消息中添加 RAT— Type— Change。 如果 H-OCS 下发的 Credit re-authorization triggers 中 包含服务区改变 ( Serving— Area— Change ) , 而 V-OCS根据拜访网络策略决定需要服务小区改 变 ( Serving— Cell— Change )，由于 Serving— Cell— Change比 Serving— Area— Change 精度更高， 因此 V-OCS将在发送给 GW/PCEF中用 Serving— Cell— Change替换 Serving— Area— Change；
( 3 )对于 Termination Action, V-OCS将根据拜访网络策略决定是否遵 循 H-OCS下发的 Termination Action, 或者用拜访网络的 Termination Action 进行替换。
可选地， V-OCS根据拜访网络策略对 H-OCS下发的信用控制决策进行 修改后， 还将修改后的信用控制决策告知 H-OCS;
S315: V-OCS向 GW/PCEF实体返回信用控制响应消息， 在消息中携带 经 V-OCS修改后的信用控制决策；
S316: GW/PCEF实体返回建立 IP-CAN会话响应消息， PCEF执行接收 到的修改后的信用控制决策。如当信用控制决策中授权的 Credit用完时， PCEF 发起信用控制请求消息， 请求 Credit; 当信用控制决策中订阅的 Credit re-authorization triggers条件满足时， PCEF实体发起信用控制请求消息， 请求 Credit; 当没有新的 Credit授权时， PCEF实体将执行终结动作。
实施例二
本实施例描述了如实施例 1的流程建立 IP-CAN会话发生修改的过程中， V-OCS与 H-OCS交互流程， 以及 V-OCS和 H-OCS信用控制决策。具体步骤 下：
S401 :位于拜访网络的网关 GW/PCEF实体收到触发决定发起 IP-CAN会 话修改流程。 该触发是用户发生了切换引起的无线接入类型 （RAT Type ) , 服务区 （Serving Area )或服务小区 （ Serving Cell )发生了改变；
S402: GW/PCEF实体向拜访地 PCRF ( V-PCRF )实体发送 IP-CAN会话 修改指示消息， 携带当前的承载信息； S403: V-PCRF实体向 H-PCRF实体发送 IP-CAN会话修改指示消息；
S404: 如果 H-PCRF实体并没有相关的用户签约信息， 就发送签约数据 请求给 SPR来获取；
S405: SPR返回确认消息， 携带用户签约信息；
S406: H-PCRF根据用户签约、 网络策略、 承载属性等进行授权和策略 决定， 重新制定 PCC规则；
S407: H-PCRF实体向 V-PCRF实体发送 IP-CAN会话修改确认消息， 消 息中携带修改后 PCC规则； 授权。 V-PCRF实体可能会进行修改；
S409: V-PCRF实体向 GW/PCEF实体发送 IP-CAN会话修改确认消息， 消息中携带 H-OCS的标识和 V-PCRF实体为该 IP-CAN会话所选择的 V-OCS 的标识；
S410: 若 401中的触发为 RAT Type、 Serving Cell发生了改变的任意一 个， 由于实施例一中 GW/PCEF 实体被订阅了 RAT— Type— Chang 和 Serving— Cell— Change的 Credit re-authorization triggers , GW/PCEF向 V-OCS发 送信用控制请求， 上报安装 RAT— Type— Chang或 Serving— Cell— Change的各个 Charging Key当前剩余的 Credit以及当前的 RAT Type和当前 UE位于的小区 标识 Cell Id;
S411： 若 401 中的触发为 RAT Type , 由于 H-OCS 并没有订阅
RAT— Type— Chang, V-OCS将根据本地策略进行重授权， V-OCS执行 S412。 若 401 中的触发为 Serving— Cell— Change, V-OCS将进一步判断 UE 当前的 Serving Area有没有发生改变， 若没有， 则 V-OCS将根据本地策略进行重授 权， V-OCS执行 S412, 若发生该了改变， 则执行 S413;
S412: V-OCS向 GW/PCEF实体返回信用控制响应消息，携带 V-OCS的 重授权的信用控制决策， 不再执行后续步骤；
S413： V-OCS 向 H-OCS 发送信用控制请求消息， 上报安装 Serving— Area— Change 的各个 Charging Key 当前剩余的 Credit 以及当前的 Serving Area。
S414: H-OCS进行归属地信用决策。 H-OCS根据网络策略为每一个请求 的 Charging key进行 Credit重授权。 若 H-OCS发现用户 Credit已用完， 将拒 绝授权；
S415: H-OCS向 V-OCS返回信用控制相应消息， 消息中携带 S414步的 信用控制决策；
S416: V-OCS根据拜访网络策略设置拜访网络的信用控制决策。
S417: V-OCS向 GW/PCEF实体返回信用控制响应消息， 在消息中携带 经 V-OCS修改后的信用控制决策；
S416: GW/PCEF实体返回建立 IP-CAN会话响应消息， PCEF实体执行 接收到的修改后的信用控制决策。如当信用控制决策中授权的 Credit用完时， PCEF 实体发起信用控制请求消息， 请求 Credit; 当信用控制决策中订阅的 Credit re-authorization triggers条件满足时， PCEF实体发起信用控制请求消息， 请求 Credit; 当没有新的 Credit授权时， PCEF实体将执行终结动作。
如图 2所示， 本发明实施例的本地疏导漫游场景在线计费的系统， 包括 V-OCS、 H-OCS和 PCEF实体，
所述 V-OCS用于在 IP-CAN会话过程中， 根据拜访网络策略对 H-OCS 下发的信用控制决策进行修改后， 再下发给 PCEF实体；
所述 PCEF实体用于执行所述修改后的信用控制决策。
所述 V-OCS进一步用于根据拜访网络策略授权信用。
所述 V-OCS进一步用于若所述 H-OCS订阅的信用重授权触发中没有包 含需要订阅的信用重授权触发， 则增加拜访网络的信用重授权触发； 以及 所述 V-OCS进一步用于若 H-OCS订阅的信用重授权触发的精度级别没 有需要订阅的信用重授权触发高， 则用拜访网络的信用重授权触发替换 H-OCS下发的信用重授权触发。
所述 V-OCS进一步用于根据拜访网络策略，用拜访网络的终结动作替换 H-OCS下发的终结动作。
所述 V-OCS进一步用于根据拜访网络策略对 H-OCS下发的信用控制决 策进行修改后， 还将修改后的信用控制决策告知给所述 H-OCS。
显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现， 它们可以集中在单个的计算装置上， 或者分布 在多个计算装置所组成的网络上， 可选地， 它们可以用计算装置可执行的程 序代码来实现， 从而， 可以将它们存储在存储装置中由计算装置来执行， 或 者将它们分别制作成各个集成电路模块， 或者将它们中的多个模块或步骤制 作成单个集成电路模块来实现。 这样， 本发明不限制于任何特定的硬件和软 件结合。
以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本 领域的技术人员来说， 本发明可以有各种更改和变化。 凡在本发明的精神和 原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护 范围之内。
工业实用性 本发明能够将拜访网络的本地策略实施于用户的在线信用控制和管理， 并能够实现拜访网络在线计费系统和归属网络在线计费系统的协调工作。

Claims

权 利 要 求 书
1、 一种本地疏导漫游场景在线计费的方法， 其包括：
在演进的分组系统的本地疏导漫游场景中使用在线计费时， 网络协议连 接接入网 （IP-CAN )会话过程中， 拜访网络在线计费系统（V-OCS )根据拜 访网络策略对归属网络在线计费系统（H-OCS ) 下发的信用控制决策进行修 改， 再将修改后的信用控制决策下发给策略和计费执行功能（PCEF ) 实体； 以及
所述 PCEF实体执行所述修改后的信用控制决策。
2、 如权利要求 1所述的方法， 其中，
所述 V-OCS根据拜访网络策略对 H-OCS下发的信用控制决策进行修改 的步骤包括：
所述 V-OCS根据拜访网络策略授权信用。
3、 如权利要求 1所述的方法， 其中，
所述 V-OCS根据拜访网络策略对 H-OCS下发的信用控制决策进行修改 的步骤包括：
若所述 H-OCS订阅的信用重授权触发中没有包含所述 V-OCS需要订阅 的信用重授权触发， 则所述 V-OCS增加拜访网络的信用重授权触发；
若所述 H-OCS订阅的信用重授权触发的精度级别没有所述 V-OCS需要 订阅的信用重授权触发的精度级别高，则所述 V-OCS用拜访网络的信用重授 权触发替换 H-OCS下发的信用重授权触发。
4、 如权利要求 1所述的方法， 其中，
所述 V-OCS根据拜访网络策略对 H-OCS下发的信用控制决策进行修改 的步骤包括：
所述 V-OCS根据拜访网络策略，用拜访网络的终结动作替换所述 H-OCS 下发的终结动作。
5、 如权利要求 1 ~ 4中任意一项所述的方法， 其中，
在所述 V-OCS根据拜访网络策略对 H-OCS下发的信用控制决策进行修 改的步骤之后， 所述方法还包括： 所述 V-OCS将修改后的信用控制决策告知 给所述 H-OCS。
6、一种本地疏导漫游场景在线计费的系统， 包括拜访网络在线计费系统 ( V-OCS )、归属网络在线计费系统（ H-OCS )和策略和计费执行功能（ PCEF ) 实体；
所述 V-OCS设置为： 在网络协议连接接入网 （IP-CAN )会话过程中， 根据拜访网络策略对 H-OCS下发的信用控制决策进行修改，再将修改后的信 用控制决策下发给 PCEF;
所述 PCEF设置为： 执行所述修改后的信用控制决策。
7、 如权利要求 6所述的系统， 其中，
所述 V-OCS是设置为以如下方式根据拜访网络策略对 H-OCS下发的信 用控制决策进行修改： 根据拜访网络策略授权信用。
8、 如权利要求 6所述的系统， 其中，
所述 V-OCS是设置为以如下方式根据拜访网络策略对 H-OCS下发的信 用控制决策进行修改：
若所述 H-OCS 订阅的信用重授权触发中没有包含需要订阅的信用重授 权触发， 则增加拜访网络的信用重授权触发； 以及
若 H-OCS 订阅的信用重授权触发的精度级别没有需要订阅的信用重授 权触发高，则用拜访网络的信用重授权触发替换 H-OCS下发的信用重授权触 发。
9、 如权利要求 6所述的系统， 其中，
所述 V-OCS是设置为以如下方式根据拜访网络策略对 H-OCS下发的信 用控制决策进行修改:根据拜访网络策略，用拜访网络的终结动作替换 H-OCS 下发的终结动作。
10、 如权利要求 6 ~ 9中任意一项所述的系统， 其中，
所述 V-OCS还设置为： 根据拜访网络策略对 H-OCS下发的信用控制决 策进行修改后， 将修改后的信用控制决策告知给所述 H-OCS。
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