CN100514912C - Method of realizing Pipe model based on distinction service - Google Patents

Method of realizing Pipe model based on distinction service Download PDF

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CN100514912C
CN100514912C CN 200510090905 CN200510090905A CN100514912C CN 100514912 C CN100514912 C CN 100514912C CN 200510090905 CN200510090905 CN 200510090905 CN 200510090905 A CN200510090905 A CN 200510090905A CN 100514912 C CN100514912 C CN 100514912C
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pipe
vpn
crc
diffserv
resource
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CN 200510090905
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Chinese (zh)
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CN1917440A (en )
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钢 程
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华为技术有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic regulation in packet switching networks
    • H04L47/10Flow control or congestion control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic regulation in packet switching networks
    • H04L47/10Flow control or congestion control
    • H04L47/24Flow control or congestion control depending on the type of traffic, e.g. priority or quality of service [QoS]
    • H04L47/2408Different services, e.g. type of service [ToS]

Abstract

本发明提供一种基于区分服务的Pipe模型实现方法,其核心为:在VPN-CRC中设置基于区分服务的Pipe连接管理信息,VPN-CRC根据所述连接管理信息、VPN-LBN中的入口PE设备传输来的基于区分服务的Pipe请求控制VPN-LBN进行Pipe连接管理。 The present invention provides a model Pipe DiffServ implementation method, the core of: Pipe connection management information is provided based differentiated services in the VPN-CRC, VPN-CRC according to the connection management information, VPN-LBN of ingress PE to distinguish the transmission device based service request control VPN-LBN Pipe Pipe for connection management. 本发明通过利用VPN-CRC、VPN-LBN体系结构来进行Pipe连接管理如创建Pipe连接、撤销Pipe连接等,使VPN业务的QoS能够得到充分保证;从而实现了完善Pipe模型实现方法、保证VPN业务QoS的目的。 The present invention is to Pipe connection management by using the VPN-CRC, VPN-LBN architecture such as creating Pipe connection revocation Pipe connection, so that the QoS VPN service would be fully guaranteed; in order to achieve a perfect Pipe model implemented method to ensure VPN services the purpose of QoS.

Description

一种基于区分服务的Pipe模型实现方法 A Method Pipe model based on differentiated services

技术领域 FIELD

本发明涉及网络通讯技术领域,具体涉及一种基于区分服务的Pipd莫型实现方法。 The present invention relates to network communication technologies, and particularly relates to a method for implementing a Pipd type Mo-based differentiated services.

背景技术 Background technique

DiffServ (Differentiated Services,区分服务)技术是由IETF (互联网工程任务组)提出的,又称为区分服务模型。 DiffServ (Differentiated Services, DiffServ) technology was developed by the IETF (Internet Engineering Task Force), also known as differentiated service model.

区分服务才莫型的基本思想是:在网络的入口处为每个数据包分类,并在数据包中标记相应的DSCP (DiffServ CodePoint,区分服务代码点),用于指示数据包在网络转发路径的内部节点上被处理的方式。 DiffServ Model with only basic idea is: at the entrance of each network packet classification and marking in the corresponding packet DSCP (DiffServ CodePoint, Differentiated Services Code Point) indicating the data packet forwarding path in the network embodiment the internal node being processed. 内部节点如网络内部的核心路由器中只保存筒单的DSCP与PHB (每跳行为)的对应机制,核心路由器根据数据包头部中的DSCP值对数据包进行相应的优先级转发,而业务流状态信息的保存、流量控制机制的实现等都在网络边界节点进行,内部节点与业务流状态无关。 Internal node such as an internal network core router only stores cylindrical single DSCP and the PHB (Per Hop Behavior) corresponding mechanism, core router data packets corresponding priority forwarding according to the DSCP values ​​in the packet header, and the service flow state save realize information flow control mechanism at the network boundary nodes are all independent internal node and a traffic flow status.

由于区分服务具有实现简单,扩展性好的特点,已在IP网络中得到了绝大部分厂家的支持,其具体实现技术包括分类、重标记、速率限制、流量整形、 拥塞避免、队列调度等。 Since the DiffServ simple implementation, good scalability, has been supported by the majority of manufacturers in the IP network, the specific implementation technologies, including classification, marking, rate limiting, traffic shaping, congestion avoidance, and queue scheduling.

Pipd莫型是ITU-T SG13/Q2的标准草案Y.vpn—qos中提出的两种VPN业务模型之一,按照Y.vpn—qos中Pip一莫型的定义,Pip一莫型用于确保点到点连接的QoS (业务服务质量),VPN用户规定VPN端点之间Pipe模型网络路径的QoS需求, 在每组VPN端点之间的Pipe路径,网络业务服务商需要提供足够的服务带宽保 Pipd Mo type is one of two VPN business model ITU-T standard draft Y.vpn-qos SG13 / Q2 in the proposed definition of a type of Mo according to Y.vpn-qos in Pip, Pip Mo type is used to ensure a the point to point connection QoS (quality of service), the user specified QoS requirements VPN network path between the VPN endpoints Pipe model, the path between each Pipe VPN endpoints, network service providers need to provide adequate bandwidth, security services

5障用户QoS需求可以实现,网络业务服务商为Pipe分配的资源不能用于其他流量。 5 impaired users can implement QoS requirements, service provider network resources allocated for the Pipe could not be used for other traffic. 用户需要在CE上提供基于目的地的流量整形功能,保证QoS需求的实现。 Users need to provide destination-based traffic shaping on CE, ensure the realization of QoS requirements.

在ITU-T SG13/Q2于2005年5月公布的Y.vpn—qos草案中,提出VPN QoS框架结构中业务Pipe模型可以通过DiffServ和InterServ两种技术构建,但没有提供具体的实现方法、处理流程和相关技术的描述,属于需要进一步讨论解决的问题,有待进一步研究和补充。 In the draft Y.vpn-qos ITU-T SG13 / Q2 in May 2005 published proposed VPN QoS framework in business models can DiffServ Pipe and InterServ two technologies to build, but did not provide specific method, processing description process and related technologies, are issues that need further discussion resolved, pending further study and additions.

发明内容 SUMMARY

本发明的目的在于,提供一种基于区分服务的Pipe模型实现方法,利用VPN-CRC、 VPN-LBN体系结构进行Pipe连接管理,完善了VPN QoS框架结构中业务Pipe模型。 Object of the present invention is to provide an implementation based on DiffServ model Pipe method using VPN-CRC, VPN-LBN Pipe connection architecture for management, improve service VPN QoS Pipe frame structure model.

为达到上述目的,本发明提供的一种基于区分服务的Pipe模型实现方法, 包括: To achieve the above object, a method of the present invention provides implementations based on DiffServ model Pipe, comprising:

a、 在VPN-CRC (VPN集中资源控制器)中设置基于区分服务的Pipe连接管理信息; a, based differentiated services provided Pipe connection management information in the VPN-CRC (VPN centralized resource controller);

b、 VPN-CRC根据所述连接管理信息、VPN-LBN (VPN承载网)中的入口PE设备传输来的基于区分服务的Pipe请求控制VPN-LBN进行Pipe连接管理。 b, VPN-CRC according to the connection management information transmitting VPN-LBN (VPN bearer network) the ingress PE device is distinguished based Pipe connection management service request control Pipe VPN-LBN.

所述Pipe连接管理为:基于区分服务的Pipe创建管理;且所述步骤a具体包括: The Pipe connection management: Management Create Pipe-based differentiated services; and the step a comprises:

在各VPN-CRC中设置用户QoS参数与区分服务QoS参数的对应关系。 Set correspondence between the user and the DiffServ QoS parameters QoS parameters of the respective VPN-CRC. 所述步骤b具体包括: Said step b comprises:

bl、入口PE设备将CE设备传输来的承栽有用户QoS参数的基于区分服务的Pipe创建请求传输至需要创建的Pipe对应的各VPN-CRC; bl, ingress PE device transmitting CE device to create each of the bearing planted VPN-CRC Pipe corresponding request to the QoS parameters need to create a user-based differentiated services Pipe;

b2、各VPN-CRC根据所述对应关系将Pipe^j建请求中用户QoS参数映射为区分服务QoS参数; b2, each of the VPN-CRC according to the corresponding relationship Pipe ^ j build a user request for the DiffServ QoS parameter mapping QoS parameters;

6b3 、各VPN-CRC根据所述映射的区分服务QoS参数确定该Pipe创建请求对应的可分配资源; 6b3, each of the VPN-CRC determination may allocate resources to the Create Pipe corresponding to the request in accordance with the DiffServ QoS parameter mapping;

b4、各VPN-CRC根据可分配资源均确定允许创建Pipe时,将相应的Pipe创建参数传输至所述入口PE设备,同时,各VPN-CRC分别配置该Pipe创建请求对应的VPN-LBN中的各中间节点; b4, each of the VPN-CRC can allocate resources according to the determined average is allowed to create Pipe, creates the appropriate parameters are transmitted to the inlet Pipe PE device, at the same time, each of the VPN-CRC of the VPN-LBN are arranged Pipe creation request corresponding to each intermediate node;

b5、所述入口PE设备根据其接收的创建参数建立基于区分服务的Pipe连接。 b5, the ingress PE device based on DiffServ Pipe connection creation parameters it receives in accordance with established.

所述步骤b3包括: Said step b3 comprises:

VPN-CRC根据所述映射的区分服务QoS参数进行资源计算,并根据资源计算结果确定该Pipe创建请求对应的可分配资源。 VPN-CRC calculated resource DiffServ QoS parameters of the mapping and determine the resource allocation Pipe creation request resource corresponding to the calculation result. 所述方法还包括: The method further comprising:

在VPN-CRC中设置Pipe资源池和/>共资源池; Pipe resource pool and set /> common resource pool in the VPN-CRC;

所述Pipe资源池中预先设置有可动态分配的各区分服务QoS参数分别对应的Pipe资源〗言息; The Pipe Pipe preset resource pool resources can be dynamically allocated for each DiffServ QoS parameters corresponding to each of the information words〗;

且所述步骤b3包括: And said step b3 comprises:

VPN-CRC根据所述映射的区分服务QoS参数判断Pipe资源池中是否有与其匹配的Pipe资源信息; The VPN-CRC DiffServ QoS parameter mapping determines whether the resource information Pipe Pipe its matching resource pool;

如果有,VPN-CRC将该匹配的Pipe资源信息确定为Pipe创建请求对应的可分配资源; If there is, VPN-CRC matches the Pipe resource information determining the allocation of resources corresponding to the request to create Pipe;

如果没有,VPN-CRC根据所述映射的区分服务QoS参数进行资源计算,并根据公共资源池、资源计算结果确定该Pipe创建请求对应的可分配资源。 If not, VPN-CRC is calculated according to the resources of the DiffServ QoS parameter mapping, and according to a common pool of resources, resource calculation result of the determination of the allocation of resources may be created corresponding to the request Pipe. 所述步骤b3还包括: Said step b3 further comprising:

根据资源计算结果确定没有该Pipe创建请求对应的可分配资源时,将Pipe 创建请求的拒绝信息传输至入口PE设备,由入口PE设备结束基于区分服务的Pipe创建管理过程,本方法结束。 When determining that no allocation of resources Pipe creation request corresponding to the calculation result of resources, will reject the create request information transmission Pipe PE device to the inlet, the inlet end of the PE Process management create a differentiated services-based Pipe, the method ends.

所述Pipe创建参数包括:Pipe在各VPN-CRC本域中的创建参数;且所述步骤b4还包括: Pipe the creation parameters comprising: creating parameters for each VPN-CRC in the present domain Pipe; b4 and further comprising the step of:

各VPN-CRC保存Pipe在本域中的创建参数。 Each VPN-CRC created to save the parameters in this domain Pipe.

所述Pipe创建参数包括:全程路径信息和映射的区分服务QoS参数。 The Create Pipe parameters include: full path information and DiffServ QoS parameter mapping. 所述步骤b5具体包括: B5 comprises the step of:

所述入口PE设备将全程路径信息和映射的区分服务QoS参数存储于QoS 路径信息表中,并为VPN-CRC传输来的标签栈设置EXP位组; The PE device inlet path label stack of the whole DiffServ QoS parameters and information stored in the mapping QoS path information table, and transmitted to the VPN-CRC bit group disposed EXP;

所述入口PE设备向对应的CE设备发送Pipe成功建立的信息,并根据路径信息表中的内容、EXP位组进行数据"^良文的转发。 The PE device transmits entrance information Pipe successfully established to the corresponding CE device, and the contents of the path information table, EXP bits group "^ good forwarding of data.

所述Pipe连接管理为:基于区分服务的Pipe撤销管理;且所述步骤a包 The Pipe connection management: undo management based DiffServ Pipe; and a step of said package

括: include:

在各VPN-CRC中分别设置Pipe在本域中的创建参数。 Creating parameters are set in this domain Pipe in the VPN-CRC in. 所述Pipe在本域中的创建参数包括:Pipe在VPN-CRC本域中的路径信息和映射的区分服务QoS参数。 The parameters created in this domain Pipe comprises: Pipe path information VPN-CRC in the same domain and in the DiffServ QoS parameter mapping. 所述步骤b具体包括: Said step b comprises:

bl,、入口PE设备将CE设备传输来的基于区分服务的Pipe撤销请求传输至Pipe对应的各VPN-CRC; bl ,, ingress PE device transmitting CE device based differentiated services revocation request to the Pipe Pipe corresponding to each VPN-CRC;

b2,、各VPN-CRC确定所述撤销请求对应的本域路径信息和映射的区分服务QoS参数,并释放资源,同时,将Pipe资源释放消息传输至入口PE设备; b2 ,, each VPN-CRC determines the revocation information and the present-domain path DiffServ QoS parameter mapping corresponding to the request and release the resources, the resource release message transmitted Pipe PE device to the inlet;

b3,、入口PE设备根据其接收的资源释放消息删除QoS路径信息表中相应的记录。 b3 ,, release message ingress PE device deletes the corresponding record in the QoS path information table according to the resource it receives.

当VPN-CRC释放的Pipe资源为Pipe资源池中的Pipe资源时,将所述释放的Pipe资源回收至该VPN-CRC的Pipe资源池中; Pipe Pipe resource when the resource is released VPN-CRC Pipe resource pool, the released resources Pipe Pipe recycling to the VPN-CRC of the pool;

当VPN-CRC释放的Pipe资源为公共资源池中的资源时,将所述释放的Pipe 资源回收至该VPN-CRC的公共资源池中。 Pipe When the resource release VPN-CRC is a common resource pool of resources, the resources released Pipe recycled to the VPN-CRC common resource pool.

通过上述技术方案的描述可知,本发明通过利用VPN-CRC、 VPN-LBN体 By the above technical solution described above, the present invention is by using the VPN-CRC, VPN-LBN body

8系结构来进行Pipe连接管理如创建Pipe连接、撤销Pipe连接等,能够保证VPN 业务的QoS;通过设置Pipe资源池简化了网络资源分配处理过程,提高了网络资源的分配效率;从而通过本发明提供的技术方案实现了完善Pipe^莫型实现方法、保证VPN业务QoS的目的。 8 architecture to Pipe connection management such as creating Pipe connection revocation Pipe connections, to ensure QoS VPN service; by providing Pipe resource pools simplify network resource allocation process, efficiency of allocating network resources; so that by the present invention We provide technical solutions to achieve the perfect Pipe ^ Mo type implementation, VPN service QoS assurance purposes.

附图说明 BRIEF DESCRIPTION

图l是QoS-VPN体系模型示意图; Figure l is a schematic view of the system model QoS-VPN;

图2是本发明的基于区分服务的创建Pipe连接的流程图。 FIG 2 is a flowchart of the Create Pipe connection based DiffServ present invention.

具体实施方式 detailed description

本发明的核心是:在VPN-CRC中设置基于区分服务的Pipe连接管理信息, VPN-CRC根据所述连接管理信息、VPN-LBN中的入口PE设备传输来的基于区分服务的Pipe请求控制VPN-LBN进行Pipe连接管理。 The core of the present invention are: Pipe connection management information is provided based differentiated services in the VPN-CRC, VPN-CRC according to the connection management information transmitting ingress PE device in the VPN-LBN requests to the Pipe differentiated services based VPN control -LBN carried Pipe connection management.

下面基于本发明的核心思想对本发明提供的技术方案做进一步的描述。 The following further description is based on the technical solution of the present invention, the core idea of ​​the present invention is provided.

集中资源控制保证QoS的MPLS NBVPN (Network Based Virtual Private Network基于网络的虚拟专网)是一种在MPLS网络上充分保证VPN业务QoS 的体系结构,MPLS NBVPN通过在^i^出IP网络中通过MPLS技术预配置一部分资源给QoS-VPN使用,这部分资源称为VPN-LBN (VPN逻辑承载网)资源, 并在当前VPN参考模型中增加控制网元,如VPN-CRC (VPN集中资源控制器), 用于维护VPN-LBN的网络拓朴和资源、以及每个QoS-VPN的成员关系信息和访问关系信息,并根据逻辑承载网资源状态进行允许控制和路径计算,保证接入的业务都能得到它们希望的服务质量,集中资源控制保证QoS的MPLS NBVPN是一种层次化结构,避免了VPN的扁平面化结构,以及VPN资源和其他业务共享资源,且不同VPN之间存在资源竟争机制。 Centralized resource control QoS guaranteed MPLS NBVPN (Network Based Virtual Private Network VPN-based network) is a full guarantee on the MPLS network VPN service QoS architecture, MPLS NBVPN ^ i ^ by the IP network through MPLS technical part of pre-configured resources to use QoS-VPN, this part of the resources referred to VPN-LBN (VPN logical bearer network) resources, and increase the current in the control network element VPN reference model, such as the VPN-CRC (VPN centralized resource controller) , maintenance of network topology and resources of the VPN-LBN and membership information and the access relationship information of each QoS-VPN, and allow control of the path computation according to the logic and bearer network resource status, the access service can be guaranteed they obtain the desired quality of service, centralized resource control QoS guaranteed MPLS NBVPN is a hierarchical structure, avoids the VPN flat surface structure, and VPN services share resources and other resources, and the resource competition between the different mechanisms VPN .

QoS-VPN框架分为两个层次:VPN承载层(bearer layer)和VPN??、栽控制层(bearer control layer) , QoS-VPN框架的体系结构如图l所示。 QoS-VPN frame is divided into two levels: VPN bearer layer (bearer layer) and VPN ??, planting control layer (bearer control layer), the frame architecture of QoS-VPN shown in Figure l.

9图1中,圆柱形的图标代表VPN-CRC,实心黑色圆点表示PE,带斜线的圓形表示ITR (中间传输路由器),空心的圆形表示CR (核心路由器),方形图标表示CE,加黑加粗的虚线表示预留带宽的LSP。 9 in FIG. 1, the cylindrical icons represent VPN-CRC, the solid black circles represent PE, shaded circle indicates the ITR (intermediate transfer routers), hollow circles represent CR (core router), the square icon indicates that the CE , with black bold dotted line reserved bandwidth LSP.

VPN-LBN是使用MPLS技术根据预先的容量规划通过配置预留带宽的LSP 连接PE、 CR、 ITR形成的,VPN承载控制层由VPN-CRC组成,每个域由一个VPN-CRC管理,VPN-CRC管理VPN-LBN的网络资源如带宽、处理器能力、队列緩沖区等,VPN-CRC能够维护VPN-LBN的网络拓朴,VPN-CRC还能够进行资源计算、路径选择、向PE设备发送路径指示,同时,VPN-CRC能够在VPN-LBN 内分配资源,实现接入控制,并为每个QoS-VPN维护成员关系信息表、连接关系信息表和相关的信令,以便实现成员关系自动发现和单边配置。 VPN-LBN using MPLS technology configure reserved bandwidth PE LSP connection according to a predetermined capacity planning, CR, ITR formed, VPN bearer control layer is made of VPN-CRC, each field consists of a VPN-CRC management, VPN- CRC network resource management of the VPN-LBN such as bandwidth, processing power, such as buffer queues, VPN-CRC can maintain VPN-LBN topology network, VPN-CRC can be further resource calculation, path selection, the transmission path PE device indicating, at the same time, VPN-CRC can be allocated resources in VPN-LBN, to achieve access control, and maintain membership information table for each QoS-VPN, the connection information table and the associated signaling, automatic discovery of membership in order to achieve and unilateral configuration.

本发明是基于集中资源控制保证QoS的MPLS NBVPN中的QOS-VPN业务体系结构。 The present invention is based on centralized resource control service guaranteed QOS-VPN MPLS NBVPN QoS architecture in.

本发明首先需要在VPN-CRC中设置基于区分服务的Pipe连接管理信息, VPN-CRC根据这些连接管理信息对PE设备传输来的与基于区分服务的Pipe连接相关的请求进行Pipe连接管理。 The present invention is first set up Pipe connection management information based on differentiated services in the VPN-CRC, VPN-CRC for Pipe connection management request according to the associated connection management information is transmitted to the PE device based on DiffServ Pipe connection. 下面以基于区分服务的Pipe创建请求、基于区分服务的Pipe撤销请求为例对本发明的基于区分服务的创建Pipe连接管理和撤销Pipe连接管理进行详细说明。 Pipe below to distinguish the service creation request based, based on differentiated services based on an example revocation request Pipe Pipe connection management and revocation create DiffServ Pipe connection management is described in detail according to the present invention.

在实现基于区分服务的创建Pipe连接过程时,各VPN-CRC中预先设置的基于区分服务的Pipe连接管理信息为:用户QoS参数与区分服务QoS参数的对应关系。 In achieving distinguishing creating Pipe connection process based service, connection management information Pipe differentiated services-based VPN-CRC in the respective pre-set to: correspondence between the user and the DiffServ QoS parameters QoS parameters. 其中,用户QoS参数即用户要求的QoS参数,用户QoS参数如带宽、时延、 抖动限制、丟失率限制等参数;区分服务QoS参数如流分类、重标记、速率限制、流量整形、拥塞避免、队列调度等。 Wherein the user QoS parameter is the user required QoS parameters, user QoS parameters such as bandwidth, delay, jitter limit, loss-rate limiting parameter; DiffServ QoS parameters such as traffic classification, re-marking, rate limiting, traffic shaping, congestion avoidance, scheduling queue.

实现基于区分服务的创建Pipe连接的主要过程如附图2所示: Based on the main process to distinguish Create Pipe connection service as shown in Figure 2:

图2中,步骤200、 CE设备向入口PE设备发送基于区分服务的Pipe创建请求, 该Pipe创建请求中承载有用户要求的QoS参数。 In FIG. 2, step 200, CE device sends a request to create an ingress PE device Pipe-based differentiated services, the Pipe creation request carrying the QoS parameters requested by the user. 到步骤210、入口PE设备将其接收的Pipe创建请求传输至其所在域的VPN-CRC,入口PE设备所在域的VPN-CRC将其接收的Pipe创建请求传输至与需要创建的Pipe有关的VPN-CRC,即如果该Pipe需要跨域建立,则该Pipe创建请求需. VPN-CRC 。 To step 210, the ingress PE device Pipe created it receives a request transmitted to it in Pipe domain VPN-CRC, the domain where the ingress PE device VPN-CRC will Pipe created it receives a request transmitted to the need to create the related VPN -CRC, that is, if the need for inter-area Pipe, Pipe create the need to request. VPN-CRC.

到步骤220、与需要创建的Pipe有关的各VPN-CRC在接收到Pipe创建请求后,首先需要根据上述对应关系将Pipe创建请求中承载的用户要求的QoS参数映射为区分服务QoS参数,即将用户要求的QoS参数映射为特定的区分服务QOS功能。 After the step 220, each of the VPN-CRC associated with the Pipe needs to be created in the received Pipe creation request first you need based on the correspondence relationship QoS parameter mapping user Pipe creation request in the bearer requirements for the DiffServ QoS parameters, i.e. the user QoS parameters required for a particular mapping DiffServ QOS functions.

到步骤230、各VPN-CRC均按照特定的区分服务QOS功能完成确定需要分配的资源、路径选择过程。 To step 230, each of the VPN-CRC determines that resource allocation are completed in a particular differentiated services QOS functions, the path selection process.

VPN-CRC按照特定的区分服务QOS功能确定需要分配的资源的方法主要有两种, 一、根据映射的区分服务QoS参数进行资源计算来确定需要分配的资源。 VPN-CRC is determined according to a particular differentiated services QOS function requires resource allocation methods are mainly two, one, the resources calculated based on DiffServ QoS parameter mapping to determine the resource to be assigned. 二、根据预先设置的Pipe资源池中的Pipe资源来确定需要分配的资源。 Second, to determine the resources need to be allocated according to the resource pool Pipe Pipe resource set in advance.

Pipe资源池是本发明为方便各VPN-CRC资源分配而提出的一种资源分配方法。 Pipe resource pool is a resource allocation method according to the present invention for the convenience of VPN-CRC proposed resource allocation. VPN-CRC可以将其所管理的资源划分为Pipe资源池和公共资源池两部分,Pipe资源池中预先设置有可动态分配的、不同规格的Pipe资源。 VPN-CRC can divide its resources for the management of public resources Pipe resource pools and pool in two parts, Pipe resource pool is preset dynamically allocated different specifications Pipe resources. 不同规格的Pipe资源对应不同的区分服务QoS参数,不同规漆的Pipe资源可以由网络服务提供商根据客户特点而预先定制。 Different specifications Pipe resources correspond to distinguish between service QoS parameters, Pipe resources can paint different rules based on customer characteristics and pre-customized by the network service provider.

当VPN-CRC接收到Pipe创建请求后,首先将Pipe创建请求中承载的用户QoS参数映射为区分服务QoS参数,然后,从Pipe资源池中查找与该区分服务QoS参数最为匹配的Pipe资源,在查找到匹配的Pipe资源时,将该Pipe资源确定为需要分配的Pipe资源,如果没有查找到匹配的Pipe资源,VPN-CRC再根据区分服务QoS参数进行资源计算,根据资源计算结果从其公共资源池中确定需要分配的Pipe资源。 When the VPN-CRC Pipe creation request is received, the user first creates Pipe QoS parameters carried in the request for the map DiffServ QoS parameters, and then find the resources Pipe DiffServ QoS parameters that most closely matches the resource pool Pipe, in when Pipe find matching resources, determining the resource requirements Pipe Pipe resource allocation, if no match is found Pipe resources, VPN-CRC calculated resources then DiffServ QoS parameters, according to the resource from the common resource results Pipe determine the pool of resources need to be allocated. 本发明通过Pipe资源池简化了网络资源分配处理过程,提高了网络资源的分配效率。 The present invention simplifies the network resource allocation process by the resource pool Pipe, efficiency of allocating network resources.

到步骤240、根据上述确定需要分配的资源的方法,各VPN-CRC均进行允许允许控制,即均判断是否能够为Pipe创建请求分配资源,如果某个VPN-CRC 不能够为Pipe创建请求分配资源,如资源计算的结果为"拒绝",则到步骤241、 这个VPN-CRC需要将拒绝的响应消息一直向其上游的VPN-CRC传送,直到传输至入口PE设备。 To step 240, in accordance with the method of determining resources to be assigned, each of the VPN-CRC allows admission control are carried out, i.e. are capable of determining whether a request for the allocation of resources Pipe created, the allocation of resources if a VPN-CRC can not be created for the request Pipe as resource calculation result is "reject", then to step 241, the VPN-CRC will reject response message needs to have its upstream VPN-CRC transmitted until the transmission apparatus to the ingress PE. 到步骤260。 To step 260.

在步骤240、如果各VPN-CRC都能够为Pipe创建请求分配资源,如各VPN-CRC均能够从Pipe资源池中为Pipe创建请求分配资源,或资源计算结果均为"允许",则到步骤250、各VPN-CRC均需要将其确定的创建参数传输入口PE设备,如将符合用户QoS参数要求的路径信息和区分服务QoS参数发送至入口PE设备。 In step 240, if each VPN-CRC can be created for requesting allocation of resources Pipe, as each VPN-CRC are able to request allocation of resources from the resource pool Pipe Pipe created, or resource calculations are "permitted", then to step 250, each of the VPN-CRC are required to determine the transmission parameters to create an ingress PE device, as will meet the QoS parameters required by the user and the path information DiffServ QoS parameters sent to the ingress PE device. 各VPN-CRC还需要完成对本域中对应的中间节点的配置过程。 Each VPN-CRC needs to complete the configuration process of the intermediate node corresponding to this domain. 上述路径信息如标签栈等。 The route information and the like such as a label stack.

各VPN-CRC可以通过承载有"允许"的响应消息将其确定的创建参数一直向其上游VPN-CRC传送,直到传输至入口PE设备。 Each VPN-CRC can be "allowed" bearer response message by determining which of the parameters has been created its upstream VPN-CRC transmitted until the transmission apparatus to the ingress PE. 到步骤260。 To step 260.

在步骤260、入口PE设备接收响应消息并判断,如果该响应消息中承载的是"允许"信息,则到步骤270、入口PE设备从响应消息中获取各VPN-CRC的创建参数,即全程路径信息和区分服务QoS参数,并将这些信息记录在QoS路径信息表中,为VPN-CRC传输来的标签栈设置EXP位组,同时,入口PE设备向CE设备请求方发送Pipe创建请求成功信息,结束CE设备请求创建Pipe过程。 In step 260, the ingress PE device receives the response message and determines, if the response message bearer is "allowed" message, and to step 270, the ingress PE device acquires creation parameters for each VPN-CRC of the response message, i.e., the whole path DiffServ QoS parameters and information, and the information recorded in the QoS path information table, is transmitted to the VPN-CRC EXP bit group disposed label stack, at the same time, the PE transmits Pipe inlet creation request success information to the CE device requesting party, Pipe creation process is complete CE device requests.

这样,入口PE设备能够根据QoS路径信息表中的内容对用户流量进行流分类、队列调度、整形、标记,MPLS封装,并根据EXP位组中的标签栈确定转发路径。 Thus, the ingress PE device to the user traffic QoS path information table according to the contents of the traffic classification, queuing, shaping, marking, the MPLS encapsulation, and determines the forwarding path label stack according EXP bits in the group.

在步骤260、如果入口PE设备接收到承载有"拒绝"信息的响应消息,则到步骤261、入口PE设备向CE设备请求方发送Pipe创建请求失败信息,结束CE 设备请求创建Pipe过程。 In step 260, if the ingress PE device receives the bearer of "reject" response message information, and to step 261, the ingress PE device sends to the CE device Pipe created failure information request requesting party, a request to create Pipe end CE device process.

12在实现基于区分服务的撤销Pipe连接过程时,各VPN-CRC中预先设置的基于区分服务的Pipe连接管理信息为:VPN-CRC本域内的Pipe创建参数,如Pipe 在本域中的路径信息和映射的区分服务QoS参数,这些信息可以是在上述基于区分服务的创建Pipe连4妄过程中建立的。 Pipe 12 is connected to achieve revoking process based on DiffServ, Pipe connection management information for each VPN-CRC set in advance based differentiated services to: create a VPN-CRC Pipe present domain parameters, such as information path Pipe this domain and DiffServ QoS parameters mapping information can be established based on the above distinguishing services even create Pipe 4 jump process.

实现基于区分服务的撤销Pipe连接主要包括如下过程: Based on DiffServ revocation Pipe connection includes the following processes:

用户CE设备通过入口PE设备向与需要撤销的Pipe连接有关的各VPN-CRC 发送基于区分服务的Pipe撤销请求。 CE device connected to a user related to each VPN-CRC Pipe inlet by the need to revoke the PE device transmits based on DiffServ Pipe revocation request.

各VPN-CRC接收到用户CE设备的基于区分服务的Pipe撤销请求后,查找符合该基于区分月良务的Pipe撤销请求对应的VPN-CRC本域内的Pipe创建参数,如全程路径信息和区分服务QoS参数,在查找到对应的VPN-CRC本域内的Pipe创建参数后,完成对已分配资源的释放,并在资源释放完成后,将资源释放完成的信息通过上游VPN-CRC—直传输至入口PE设备。 Each VPN-CRC received user CE device based on DiffServ Pipe the revocation request to find matches the Pipe creation parameter VPN-CRC in the same domain based Pipe distinguish month good service revocation corresponding to the request, such as full path information and DiffServ QoS parameters, after finding the VPN-CRC Pipe created corresponding to this domain parameters, and releases the allocated resources, and the resource release is completed, the completion of resource release to the transmission of information via the inlet upstream VPN-CRC- linear PE equipment.

如果VPN-CRC释放的资源是从Pipe资源池中分配的Pipe资源,则将这个释放的资源回收到Pipe资源池中,如杲VPN-CRC释放的资源是从公共资源池中分配的资源,则将这个释放的资源仍旧回收到公共资源池中,以便于今后使用。 If the VPN-CRC released resources are allocated from Pipe resource pool Pipe resources, this will release resources recovered Pipe resource pool, such as Gao VPN-CRC is the release of resources from public resources allocated resource pool, then this will release resources still to recover public resource pool for use in the future.

入口PE设备接收到VPN-CRC传输来的资源释放完成的信息后,删除其保存的该Pipe的创建参数,如删除QoS路径信息表中相应的全程路径信息和区分服务QoS参数,并在删除该条记录时,向CE设备请求方发送撤销请求完成的信息, 结束CE设备请求撤销Pipe过程。 Ingress PE device receives the information VPN-CRC transmission to the completion of resource release, delete the created parameters Pipe thereof stored, such as deleting QoS path information table corresponding to the entire route information and DiffServ QoS parameters, and delete the when record, send the withdraw request to the CE device to complete the requester, ending Pipe CE device revocation request process.

虽然通过实施例描绘了本发明,本领域普通技术人员知道,本发明有许多变形和变化而不脱离本发明的精神,本发明的申请文件的权利要求包括这些变形和变化。 Although the present invention is depicted by way of example, those of ordinary skill in the art know that there are many modifications and variations of the present invention without departing from the spirit of the invention, the application file as claimed in claim of the present invention include such modifications and variations.

Claims (11)

  1. 1、一种基于区分服务的Pipe模型实现方法,其特征在于,包括:在各VPN集中资源控制器VPN-CRC中分别设置用户QoS参数与区分服务QoS参数的对应关系;需要创建的Pipe对应的各VPN-CRC接收承载有用户QoS参数的基于区分服务的Pipe创建请求;各VPN-CRC根据所述对应关系将Pipe创建请求中用户QoS参数映射为区分服务QoS参数;各VPN-CRC根据所述映射的区分服务QoS参数确定该Pipe创建请求对应的可分配资源;各VPN-CRC根据可分配资源均确定允许创建Pipe时,将相应的Pipe创建参数传输至所述入口PE设备,各VPN-CRC分别配置该Pipe创建请求对应的VPN承载网VPN-LBN中的各中间节点;所述入口PE设备根据其接收的创建参数建立基于区分服务的Pipe连接。 1, one implementation method based on DiffServ model Pipe, characterized by comprising: setting correspondence between the user and the DiffServ QoS parameters QoS parameters in the centralized resource controller VPN VPN-CRC, respectively; the need to create the corresponding Pipe request to create a differentiated services-based VPN-CRC Pipe respective users received bearer QoS parameters; each VPN-CRC will Pipe according to the correspondence creation request to the user QoS DiffServ QoS parameter mapping parameters; each according to the VPN-CRC DiffServ QoS parameter mapping to determine the allocation of resources Pipe creation request may correspond; and when each of the VPN-CRC can allocate resources are determined according to allowed to create Pipe, corresponding to the transmission parameter created Pipe inlet PE device, each of the VPN-CRC the Pipe respectively disposed creation request corresponding to the intermediate nodes VPN bearer network in VPN-LBN; ingress PE device to establish the connection based on DiffServ Pipe according creation parameters it receives.
  2. 2、 如权利要求1所述的一种基于区分服务的Pipe模型实现方法,其特征在于,所述各VPN-CRC根据所述映射的区分服务QoS参数确定该Pipe创建请求对应的可分配资源包括:VPN-CRC根据所述映射的区分服务QoS参数进行资源计算,并根据资源计算结果确定该Pipe创建请求对应的可分配资源。 2, as claimed in claim 1, one of the Pipe Model DiffServ implementation method, characterized in that each of the VPN-CRC determines the allocable resource Pipe comprising a creation request corresponding to the DiffServ QoS parameter mapping : VPN-CRC calculated resource DiffServ QoS parameters of the mapping and determine the resource allocation Pipe creation request resource corresponding to the calculation result.
  3. 3、 如权利要求1所述的一种基于区分服务的Pipe模型实现方法,其特征在于,所述方法还包括:在VPN-CRC中设置Pipe资源池和公共资源池;所述Pipe资源池中预先设置有可动态分配的各区分服务QoS参数分别对应的Pipe资源信息;且所述各VPN-CRC根据所述映射的区分服务QoS参数确定该Pipe创建请求对应的可分配资源包括:VPN-CRC根据所述映射的区分服务QoS参数判断Pipe资源池中是否有与其匹配的Pipe资源信息;如果有,VPN-CRC将该匹配的Pipe资源信息确定为Pipe创建请求对应的可分配资源;如果没有,VPN-CRC根据所述映射的区分服务QoS参数进行资源计算,并才艮据资源计算结果从公共资源池中确定该Pipe创建请求对应的可分配资源。 3, as claimed in claim 1, one of the Pipe Model DiffServ implementation method, wherein said method further comprises: setting Pipe common resource pool and pool resources in VPN-CRC; Pipe the resource pool Pipe with a pre-set can be dynamically allocated resource information of each of the DiffServ QoS parameters respectively; and the respective VPN-CRC determination may allocate resources to the Create Pipe corresponding to the request comprising the parameter of the DiffServ QoS mapping: VPN-CRC the DiffServ QoS parameter mapping determines whether the resource information Pipe Pipe its matching resource pool; if, VPN-CRC matches the Pipe resource information determining the allocation of resources corresponding to the request Pipe created; if not, VPN-CRC calculation resource parameter according to the DiffServ QoS mapping, and only resource calculation result of the determination according Gen allocable resource creation request corresponding to the Pipe from a common resource pool.
  4. 4、 如权利要求2或3所述的一种基于区分服务的Pipe模型实现方法,其特征在于,所述各VPN-CRC根据所述映射的区分服务QoS参数确定该Pipe 创建请求对应的可分配资源还包括:根据资源计算结果确定没有该Pipe创建请求对应的可分配资源时,将Pipe 创建请求的拒绝信息传输至入口PE设备,由入口PE设备结束基于区分服务的Pipe创建管理过程,本方法结束。 4 can be assigned, as to claim 2 or claim 3 Pipe Model DiffServ implementation method, characterized in that each of the VPN-CRC is determined according to the Pipe creation request corresponding to the DiffServ QoS parameter mapping is resource further comprises: determining the absence of the Pipe creation request can be allocated resources corresponding to the calculation result of resources, will reject information transmission Pipe creation request to the ingress PE device, by the ingress PE device end creation management process based on DiffServ Pipe, the method End.
  5. 5、 如权利要求1 、 2或3所述的一种基于区分服务的Pipe模型实现方法, 其特征在于,所述Pipe创建参数包括:Pipe在各VPN-CRC本域中的创建参数;且所述各VPN-CRC根据可分配资源均确定允许创建Pipe时,将相应的Pipe创建参数传输至所述入口PE设备,各VPN-CRC分别配置该Pipe创建请求对应的VPN承载网VPN-LBN中的各中间节点还包括:各VPN-CRC保存Pipe在本域中的创建参数。 5, a right to as 1, 2, or 3, wherein the model-based Pipe DiffServ implementation method, wherein said parameters created Pipe comprising: creating parameters for each VPN-CRC in the same domain of the Pipe; and the each of said VPN-CRC can allocate resources according to the determined average when creating Pipe allowed, corresponding to the transmission parameter created Pipe inlet PE device, each of the VPN-CRC are arranged Pipe creation request corresponding VPN bearer network in VPN-LBN each intermediate node further comprising: each of the VPN-CRC to save parameters created in this domain Pipe.
  6. 6、 如权利要求1 、 2或3所述的一种基于区分服务的Pipe模型实现方法, 其特征在于,所述Pipe创建参数包括:全程路径信息和映射的区分服务QoS 参数。 6, one kind of claim 1, 2 or 3, wherein the method implemented Pipe model based on DiffServ, wherein said parameter comprises creating Pipe: full path information and DiffServ QoS parameter mapping.
  7. 7、 如权利要求6所述的一种基于区分服务的Pipe模型实现方法,其特征在于,且所述入口PE设备根据其接收的创建参数建立基于区分服务的Pipe连接具体包括:所述入口PE设备将全程路径信息和映射的区分服务QoS参数存储于QoS 路径信息表中,并为VPN-CRC传输来的标签栈设置EXP位组;所述入口PE设备向对应的CE设备发送Pipe成功建立的信息,并根据路径信息表中的内容、EXP位组进行数据"^艮文的转发。 7, as claimed in claim 6, one of the Pipe Model DiffServ implementation method, characterized in that the inlet and the PE device to establish connection based on DiffServ Pipe comprises creation parameters it receives in accordance with: the ingress PE the full path information devices and mapping the QoS DiffServ QoS parameters are stored in the path information table, and is transmitted to the VPN-CRC EXP bit group disposed label stack; ingress PE device to the corresponding CE device transmits Pipe successfully established information, and the contents of the path information table, EXP bits group "^ Burgundy forwarding of data.
  8. 8、 如权利要求1至5中任一权利要求所述的一种基于区分服务的Pipe模型实现方法,其特征在于,所述方法还包括:在各VPN-CRC中分别设置Pipe在本域中的创建参数。 8, as claimed in one kind of 1 to 5 according to any one of claims claim Pipe Model DiffServ implementation method, wherein said method further comprises: Pipe disposed in this field in the VPN-CRC, respectively creation parameters.
  9. 9、 如权利要求8所述的一种基于区分服务的Pipe模型实现方法,其特征在于,所述Pipe在本域中的创建参数包括:Pipe在VPN-CRC本域中的路径信息和映射的区分服务QoS参数。 9, as claimed in claim 8, one of the differentiated services model based Pipe implemented method, wherein said parameters created in this domain Pipe comprises: Pipe path VPN-CRC in the same domain, and mapping information DiffServ QoS parameters.
  10. 10、 如权利要求9所述的一种基于区分服务的Pipe模型实现方法,其特征在于,所述方法还包括:入口PE设备将CE设备传输来的基于区分服务的Pipe撤销请求传输至Pipe 对应的各VPN-CRC;各VPN-CRC确定所述撤销请求对应的本域路径信息和映射的区分服务QoS参数,并释放资源,同时,将Pipe资源释放消息传输至入口PE设备;入口PE设备根据其接收的资源释放消息删除QoS路径信息表中相应的记录。 10, as claimed in claim 9, one of the Pipe Model DiffServ implementation method, wherein said method further comprises: based on DiffServ ingress PE device to the transmitting CE device revocation request to the Pipe Pipe correspond each VPN-CRC; each VPN-CRC determines the revocation information and the present-domain path DiffServ QoS parameter mapping corresponding to the request and release the resources, the resource release message is transmitted to the Pipe inlet device PE; PE device in accordance with an inlet receiving the resource release message which deletes the corresponding record in the QoS path information table.
  11. 11、 如权利要求10所述的一种基于区分服务的Pipe模型实现方法,其特征在于:当VPN-CRC释放的Pipe资源为Pipe资源池中的Pipe资源时,将所述释放的Pipe资源回收至该VPN-CRC的Pipe资源池中;当VPN-CRC释放的Pipe资源为公共资源池中的资源时,将所述释放的Pipe资源回收至该VPN-CRC的7>共资源池中。 Pipe Pipe resource when the resource is released VPN-CRC Pipe resource pool, the recycling released Pipe: 11, as claimed in claim 10, one of the Pipe Model DiffServ implementation method, wherein Pipe resource pool to the VPN-CRC; and when the VPN-CRC Pipe resource release public resource pool is a resource, the resource recovery Pipe released to the VPN-CRC of 7> common resource pool.
CN 200510090905 2005-08-19 2005-08-19 Method of realizing Pipe model based on distinction service CN100514912C (en)

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