CN100428674C - A method for interworking entities to participate in charging in network interworking scenarios - Google Patents
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及一种NGN网络域间互通时的计费方法，尤其涉及的是，在网络互通场景中互通实体参与计费的方法。The present invention relates to a charging method for intercommunication between NGN network domains, in particular to a method for intercommunication entities participating in charging in the network intercommunication scene.
背景技术Background technique
TISPAN(The Telecoms&Internet converged Services&Protocols forAdvanced Networks)作为国际和欧洲的电信标准组织正在制定未来NGN网络的网络架构，这个架构是以IMS(IP Multimedia Subsystem，IP多媒体子系统)为核心的，其中IMS核心部分的架构如图1灰色方框内部所示，NGN网络的计费功能在Charging Functions实现，包括产生计费数据记录CDR(Charging Data Record)。图中和Charging Functions有接口的实体包括应用服务器AS以及IMS核心的所有功能实体。但负责域间互通的功能实体-边界控制实体IBCF(Interconnection Border Control Function，互通边界控制功能)和-边界网关实体IBGF(Interconnection Border Gateway Function，互通边界网关功能)与计费功能没有接口。TISPAN (The Telecoms&Internet converged Services&Protocols for Advanced Networks), as an international and European telecommunication standards organization, is formulating the network architecture of the future NGN network. This architecture is based on IMS (IP Multimedia Subsystem, IP Multimedia Subsystem). The architecture is shown in the gray box in Figure 1. The charging function of the NGN network is implemented in Charging Functions, including the generation of charging data records CDR (Charging Data Record). The entities that have interfaces with Charging Functions in the figure include all functional entities of the application server AS and IMS core. However, the functional entities responsible for inter-domain intercommunication - the border control entity IBCF (Interconnection Border Control Function, Interconnection Border Control Function) and - the border gateway entity IBGF (Interconnection Border Gateway Function, Interconnection Border Gateway Function) have no interface with the charging function.
所述域间互通实体IBCF是控制两个运营商网络边界的功能实体，它的功能在TISPAN定义中包括：和传送层资源功能实体在图1中即I-BGF交互，也可能是间接的交互，完成NAPT(Network Address and Port Translation，网络地址端口号翻译)/FW(Fire Wall，防火墙)、媒体编解码转换、IP Qos标签分配等功能；当需要和非SIP(Session Initiation Protocol，会话发起协议)域互通时和IWF交互，完成SIP到非SIP的转换。The inter-domain interworking entity IBCF is a functional entity that controls the network boundaries of two operators, and its functions include in the definition of TISPAN: interacting with the transport layer resource functional entity, that is, I-BGF in Figure 1, or indirect interaction , to complete NAPT (Network Address and Port Translation)/FW (Fire Wall, firewall), media codec conversion, IP Qos label distribution and other functions; when necessary and non-SIP (Session Initiation Protocol, session initiation protocol ) interacts with the IWF during domain interworking to complete the conversion from SIP to non-SIP.
但对于域间互通实体在计费功能中的作用和接口关系，TISPAN没有明确定义，ITU(国际电信联盟International Telecommunication Union)也还没有涉及到计费相关的具体功能实现和接口定义。However, TISPAN has not clearly defined the role and interface relationship of the inter-domain interworking entity in the charging function, and the ITU (International Telecommunication Union) has not yet involved the specific function implementation and interface definition related to charging.
现有技术由于作为媒体汇聚和信令互通的域间互通实体没有参与到计费中，会造成在某些需要从域间互通实体得到计费相关信息，例如流量信息来进行计费的场景下，计费无法进行或不准确。因此，现有技术还有待于继续改进和发展。In the existing technology, because the inter-domain interworking entity as media aggregation and signaling interworking does not participate in charging, it will cause charging-related information, such as traffic information, to be obtained from the inter-domain interworking entity for charging scenarios. , billing cannot be performed or is inaccurate. Therefore, prior art also needs to continue to improve and develop.
发明内容Contents of the invention
本发明的目的在于提供一种网络互通场景中互通实体参与计费的方法，为域间互通场景下的计费功能提供了更完备的解决方案。The purpose of the present invention is to provide a method for an interworking entity to participate in charging in a network interworking scenario, and provide a more complete solution for the charging function in an inter-domain interworking scenario.
本发明的技术方案包括：Technical scheme of the present invention comprises:
一种网络互通场景中互通实体参与计费的方法，其用于不同域间互通场景下的计费，其中，在域间互通的控制层面的边界控制实体增加支持域间计费功能，并与本域内的计费功能模块建立计费交互接口；所述方法还包括步骤：A method for intercommunication entities participating in charging in a network interworking scenario, which is used for charging in different inter-domain interworking scenarios, wherein, the border control entity at the control level of inter-domain intercommunication adds support for inter-domain charging functions, and cooperates with The billing function module in this domain establishes the billing interaction interface; The method also includes the steps:
A、所述边界控制实体在预定条件下向本域内的所述计费功能模块发送计费请求并与计费功能模块进行计费交互，所述计费请求中携带有计费参数，以便所述计费功能模块进行计费，所述预定条件为发起会话，或者媒体流的增加、删除或业务触发事件，或者会话释放。A. The border control entity sends a charging request to the charging function module in the domain under predetermined conditions and performs charging interaction with the charging function module. The charging request carries charging parameters, so that The charging function module performs charging, and the predetermined condition is the initiation of a session, or the addition or deletion of a media stream or a service trigger event, or a session release.
所述的方法，其中，所述步骤A包括：Described method, wherein, described step A comprises:
A11、所述预定条件为发起会话，终端向跨域的另一终端发起会话请求，对方应答后，所述边界控制实体向本域内的所述计费功能模块发送计费请求，并携带发送计费参数；A11. The predetermined condition is to initiate a session. The terminal initiates a session request to another terminal across domains. After the other party responds, the border control entity sends a charging request to the charging function module in the domain, and carries the sending counting request. fee parameter;
A12、所述计费功能模块向所述边界控制实体发送计费应答，并记录计费参数。A12. The charging function module sends a charging response to the border control entity, and records charging parameters.
所述的方法，其中，所述步骤A还包括：The method, wherein, the step A also includes:
A21、所述预定条件为媒体流的增加、删除或业务触发事件，在通话过程中，所述边界控制实体向本域内的所述计费功能模块发送计费请求，并携带发送计费参数；A21. The predetermined condition is the addition or deletion of a media stream or a service trigger event. During the call, the border control entity sends a charging request to the charging function module in the local domain, and carries sending charging parameters;
A22、所述计费功能模块向所述边界控制实体发送计费应答，并记录计费参数。A22. The charging function module sends a charging response to the border control entity, and records charging parameters.
所述的方法，其中，所述步骤A还包括：The method, wherein, the step A also includes:
A31、所述预定条件为会话释放，所述边界控制实体向本域内的所述计费功能模块发送计费请求，并携带发送计费参数；A31. The predetermined condition is session release, and the border control entity sends a charging request to the charging function module in the local domain, and carries sending charging parameters;
A32、所述计费功能模块向所述边界控制实体发送计费应答，并记录计费参数。A32. The charging function module sends a charging response to the border control entity, and records charging parameters.
一种网络互通场景中互通实体参与计费的方法，其用于不同域间互通场景下的计费；其特征在于，在域间互通的承载层面边界网关实体增加支持域间计费功能，并与本域内的计费功能模块设置计费交互接口；并且所述方法还包括步骤：A method for intercommunication entities participating in charging in a network interworking scenario, which is used for charging in different inter-domain interworking scenarios; characterized in that, the border gateway entity at the bearer level of inter-domain intercommunication is added to support inter-domain charging functions, and Set up a charging interaction interface with the charging function module in this domain; and the method also includes the steps of:
A、所述边界网关实体在预定条件下向本域内所述计费功能模块发送计费请求并与计费功能模块进行计费交互，所述计费请求中携带有计费参数，以便计费功能模块进行计费，所述预定条件为媒体通道协商成功后的开启、关闭或释放。A. The border gateway entity sends a charging request to the charging function module in the domain under predetermined conditions and performs charging interaction with the charging function module. The charging request carries charging parameters for charging The functional module performs billing, and the predetermined condition is opening, closing or releasing the media channel after successful negotiation.
所述的方法，其中，所述步骤A具体包括：The method, wherein, the step A specifically includes:
A1、所述预定条件为在媒体通道协商成功后的开启、关闭或释放时，所述边界网关实体向所述计费功能模块发送计费请求，其中携带计费参数；A1. The predetermined condition is that when the media channel is opened, closed or released after successful media channel negotiation, the border gateway entity sends a charging request to the charging function module, which carries charging parameters;
A2、所述计费功能模块向所述边界网关实体发送计费应答，并记录和处理对应计费参数。A2. The charging function module sends a charging response to the border gateway entity, and records and processes corresponding charging parameters.
本发明所提供的一种网络互通场景中互通实体参与计费的方法，由于采用设置网络控制层面的边界控制实体以及网络承载层面的边界网关实体与计费功能模块的计费交互接口，实现了对跨域互通场景下的计费功能，消除了不同运营商之间的计费纠葛。The present invention provides a method for the intercommunication entity to participate in charging in the network interworking scenario. Since the charging interaction interface between the border control entity at the network control level and the border gateway entity at the network bearer level and the charging function module is set, the charging function module is realized. For the billing function in the cross-domain interworking scenario, the billing disputes between different operators are eliminated.
附图说明Description of drawings
图1为TISPAN已经定义的NGN网络架构示意图；Figure 1 is a schematic diagram of the NGN network architecture defined by TISPAN;
图2为本发明方法的NGN网络架构示意图；Fig. 2 is the NGN network architecture schematic diagram of the inventive method;
图3为本发明网络互通场景中主叫用户所属的NGN网络中互通实体IBCF参与计费的方法的呼叫流程示意图；Fig. 3 is a schematic call flow diagram of the method for the interworking entity IBCF participating in charging in the NGN network to which the calling user belongs in the network interworking scenario of the present invention;
图4为本发明网络互通场景中被叫用户所属的NGN网络中互通实体的IBCF参与计费的方法的流程示意图；4 is a schematic flow diagram of a method for the IBCF of the interworking entity in the NGN network to which the called user belongs to participate in charging in the network interworking scenario of the present invention;
图5为本发明方法的IBGF参与计费的示例流程示意图。Fig. 5 is a schematic flow chart of an example of IBGF participating in charging in the method of the present invention.
具体实施方式Detailed ways
以下结合附图，将对本发明的各较佳实施例进行较为详细的说明。Various preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
本发明的网络互通场景中互通实体参与计费的方法，在两个不同的NGN运营商域间互通场景下，尤其是没有信任关系的运营商间，在控制层面需要一个具有计费功能的实体收集、传递负责运营商网络间计费结算的计费信息，这个信息和运营商网络内部网络实体针对通信的计费信息可能有交叉，后者信息侧重在针对用户某次通信的计费信息，而前者侧重在针对运营商间结算某次通信的计费信息，所以信息也不完全相同。In the method for the intercommunication entity participating in charging in the network interworking scenario of the present invention, in the intercommunication scenario between two different NGN operators, especially between operators without a trust relationship, an entity with a charging function is required at the control level Collect and transmit billing information responsible for billing and settlement between operator networks. This information may overlap with the billing information for communication of network entities within the operator network. The latter information focuses on the billing information for a certain communication of the user. The former focuses on the billing information for settlement of a certain communication between operators, so the information is not exactly the same.
同时为配合运营商的网间针对流量的计费需求，在承载层面网间还需要一个能够收集运营商网间流量，并把相关信息送到相应的计费中心的网络实体。在目前TISPAN架构下，可以在I-BCF上实现上述控制层面的网间计费功能，在I-BGF上实现上述承载层面的网间计费功能。At the same time, in order to meet the billing requirements of the operator's network for traffic, the network at the bearer level also needs a network entity that can collect the traffic between the operator's network and send the relevant information to the corresponding billing center. Under the current TISPAN architecture, the above-mentioned inter-network charging function of the control plane can be implemented on the I-BCF, and the above-mentioned inter-network charging function of the bearer plane can be realized on the I-BGF.
本发明方法中的所述计费功能包括了离线计费和在线计费即实时计费功能。在离线计费场景下，IBCF和Charging Functions的接口可以为离线计费参考点Rf(Offline Charging Reference Point)接口；实时计费情况下，IBCF和Charging Functions的接口可以为实时计费参考点Ro(Online ChargingReference Point)接口，更新后的NGN架构图如图2所示，在IBCF、IBGF与Charging Functions之间分别连线表示其之间设立的接口。The charging function in the method of the present invention includes offline charging and online charging, that is, the real-time charging function. In the offline charging scenario, the interface between IBCF and Charging Functions can be the offline charging reference point Rf (Offline Charging Reference Point) interface; in the case of real-time charging, the interface between IBCF and Charging Functions can be the real-time charging reference point Ro( Online ChargingReference Point) interface, the updated NGN architecture diagram is shown in Figure 2, and the lines between IBCF, IBGF and Charging Functions represent the interfaces established between them.
以NGN用户始发的一次会话建立为例，此次会话的被叫方属于另一个域，域间互通功能在控制层面由IBCF完成，在传送层面由IBGF完成，IBCF在整个通信过程中收集计费信息，通过Diameter信令的Accounting Requests(ACR)[Start，Interim，Stop and Event]将计费信息传给Charging Functions，其处理流程如图3所示，包括步骤：Take a session establishment initiated by an NGN user as an example. The called party of this session belongs to another domain. The inter-domain interworking function is completed by IBCF at the control plane and IBGF at the transport plane. IBCF collects data during the entire communication process. The billing information is transmitted to Charging Functions through Accounting Requests (ACR) [Start, Interim, Stop and Event] of Diameter signaling. The processing flow is shown in Figure 3, including steps:
1、终端UE发起会话；1. The terminal UE initiates a session;
2、被叫方应答；2. The called party answers;
3、IBCF收到被叫方应答消息后，发送计费请求Accounting Request消息到计费功能模块Charging Functions，其中计费类型Accounting-Record-Type参数为记录开始START RECORD，由Charging Functions记录一次会话的开始。3. After receiving the response message from the called party, IBCF sends an Accounting Request message to the charging function module Charging Functions, where the accounting type Accounting-Record-Type parameter is START RECORD, and Charging Functions records a session start.
4、计费功能模块Charging Functions应答，表示收到了IBCF的请求，并已记录下了相关信息。4. The charging function module Charging Functions responds, indicating that it has received the request from IBCF and has recorded relevant information.
如图3所示的，14和15步骤也是本发明方法中的计费交互过程；而其他的流程步骤，包括5-6和7-8分别为S-CSCF和P-CSCF向ChargingFunctions传送计费开始相关信息及其应答，皆为现有技术已有的计费流程，因此不再赘述。在一次会话中Charging Functions会从参与此会话的多个网络实体接收到计费信息，产生相应的记录。Charging Functions通过这些消息中的某些参数如Session ID，ICID，GCID等关联这多个记录。As shown in Figure 3, steps 14 and 15 are also the charging interaction process in the method of the present invention; and other process steps, including 5-6 and 7-8, are respectively for S-CSCF and P-CSCF to send charging to ChargingFunctions The start-related information and its response are both existing billing procedures in the prior art, so details will not be repeated here. In a session, Charging Functions will receive charging information from multiple network entities participating in the session, and generate corresponding records. Charging Functions associates these multiple records through certain parameters in these messages, such as Session ID, ICID, GCID, etc.
以NGN用户终结的一次会话建立为例，此次会话的主叫方属于另一个域，域间互通功能在控制层面由IBCF完成，在传送层面由IBGF完成，IBCF在整个通信过程中收集计费信息，通过Diameter信令的Accounting Requests(ACR)[Start，Interim，Stop and Event]将计费信息传给Charging Functions。为简化流程图，被叫NGN用户归属域的I-CSCF在图中省略，但对本领域技术人员显然可以获知其可能的连接结构。Take the establishment of a session terminated by an NGN user as an example. The calling party of this session belongs to another domain. The inter-domain interworking function is completed by IBCF at the control plane and IBGF at the transport plane. IBCF collects billing during the entire communication process Information, through Accounting Requests (ACR) [Start, Interim, Stop and Event] of Diameter signaling, the accounting information is sent to Charging Functions. To simplify the flowchart, the I-CSCF in the home domain of the called NGN user is omitted in the figure, but those skilled in the art can clearly know its possible connection structure.
图4表示了上述被叫呼叫过程IBCF参与计费的流程，除了IBCF与Charging Functions之间的计费交互(步骤7、8以及步骤10、11)外，其他皆为现有技术的连接过程，因此不再赘述。Fig. 4 shows the flow process of the above-mentioned called call process IBCF participating in charging, except for the charging interaction between IBCF and Charging Functions (steps 7, 8 and steps 10, 11), the others are all connection processes of the prior art, So no more details.
从图3和图4的所示可以看出，跨不同运营商域的互通中，互通实体IBCF(图示中为重点突出，省略了IBGF的参与，实施中IBGF也是需要参与整个会话过程的)实现了跨域的互通，并在此过程中，包括会话发起、通道建立过程中，各域内IBCF实现了域间互通场景下的离线计费方式。From Figure 3 and Figure 4, it can be seen that in the interworking across different operator domains, the interworking entity IBCF (the emphasis is highlighted in the illustration, the participation of IBGF is omitted, and the IBGF also needs to participate in the entire session process during implementation) Cross-domain intercommunication is realized, and during this process, including session initiation and channel establishment, the IBCF in each domain realizes the offline charging method in the inter-domain intercommunication scenario.
本发明方法的释放过程中各个实体的表现和呼叫建立过程类似，如图3中的步骤14、15和图4中的步骤10、11。The performance of each entity in the release process of the method of the present invention is similar to the call establishment process, such as steps 14 and 15 in FIG. 3 and steps 10 and 11 in FIG. 4 .
如图5所示是本发明方法的域间互通承载层面功能实体IBGF参与到实时计费的依次的3个不同的示例流程图，其中SPDF是TISPAN定义的参与资源预留/控制的功能实体。图5中所示的3个不同的流程是基本相对独立的，其具体说明如下：As shown in FIG. 5 , three different exemplary flow charts are shown in sequence in which the inter-domain interworking bearer level functional entity IBGF of the method of the present invention participates in real-time charging, wherein SPDF is a functional entity defined by TISPAN participating in resource reservation/control. The three different processes shown in Figure 5 are basically relatively independent, and their specific descriptions are as follows:
首先，在跨域需要互通时，需要先进行媒体通道的协商，此过程未在图5中示意；在媒体通道协商成功后，在开启使用前，需有一个门控动作，将已经协商好的媒体通道打开，此时IBCF和SPDF以及IBGF依次执行门控操作，所述IBGF并同时向计费功能模块Charging Functions发送计费请求，告知媒体通道开启事件，以及相关的媒体参数。所述计费功能模块ChargingFunctions将回复计费请求响应，表示接收到了计费请求，同时会对收到的计费请求进行相应处理。First of all, when cross-domain intercommunication is required, media channel negotiation needs to be carried out first. This process is not shown in Figure 5; When the media channel is opened, the IBCF, SPDF, and IBGF perform gating operations sequentially, and the IBGF simultaneously sends a charging request to the charging function module Charging Functions to inform the media channel opening event and related media parameters. The charging function module ChargingFunctions will reply a charging request response, indicating that the charging request has been received, and will process the received charging request accordingly.
当媒体通道需要关闭时，IBCF、SPDF和IBGF依次执行门控的关闭媒体通道动作，此时关闭并不等于释放，所述媒体通道依然存在，只是暂时不用。此时，媒体通道内无数据流量，这时，所述IBGF与所述计费功能模块Charging Functions进行计费交互，告知相关计费参考参数，从而实现准确的流量计费。When the media channel needs to be closed, IBCF, SPDF, and IBGF sequentially execute the action of closing the media channel by gate control. At this time, closing does not mean releasing, and the media channel still exists, but it is not used temporarily. At this time, there is no data traffic in the media channel. At this time, the IBGF performs charging interaction with the charging function module Charging Functions, and notifies relevant charging reference parameters, thereby realizing accurate traffic charging.
当媒体通道释放时，所述IBCF、SPDF和IBGF相继执行释放媒体通道操作，此时，媒体通道将完全被释放，所述IBGF即与所述计费功能模块Charging Functions进行计费交互，告知媒体释放事件，从而使ChargingFunctions能够实现准确的流量计费。When the media channel is released, the IBCF, SPDF, and IBGF successively execute the media channel release operation. At this time, the media channel will be completely released, and the IBGF will interact with the charging function module Charging Functions to inform the media Release events so that ChargingFunctions can achieve accurate traffic billing.
通过上述本发明方法的实现方案，在域间互通场景下，完善了运营商的计费功能，以及解决了运营商间计费结算的问题。需注意的是，上述互通实体IBCF和IBGF参与计费的涉及中，可以单独涉及IBCF或IBGF的参与计费，或者两者共同参与计费，由计费功能模块进行关联取舍。可以通过上述互通实体实现离线或在线的计费过程，或基于流量或事件的计费过程等等，这些计费的过程的具体的实现为现有技术所公开，在此不再赘述。Through the implementation scheme of the method of the present invention, in the inter-domain intercommunication scenario, the operator's charging function is improved, and the problem of inter-operator charging and settlement is solved. It should be noted that, among the above-mentioned interworking entities IBCF and IBGF participating in charging, IBCF or IBGF may participate in charging independently, or both may participate in charging jointly, and the charging function module makes the association selection. Offline or online charging processes, or flow-based or event-based charging processes, etc. can be implemented through the above-mentioned interworking entities. The specific implementation of these charging processes is disclosed in the prior art, and will not be repeated here.
但应当指出的是，上述针对具体实施例的说明较为具体，并不能因此而理解为对本发明专利保护范围的限制，本发明的专利保护范围应以所附权利要求为准。However, it should be noted that the above descriptions for specific embodiments are relatively specific, and should not be construed as limiting the scope of the patent protection of the present invention. The scope of protection of the patent protection of the present invention should be based on the appended claims.
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