WO2009024000A1 - Cross-domain end-to-end path establishment method - Google Patents

Cross-domain end-to-end path establishment method Download PDF

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Publication number
WO2009024000A1
WO2009024000A1 PCT/CN2007/003676 CN2007003676W WO2009024000A1 WO 2009024000 A1 WO2009024000 A1 WO 2009024000A1 CN 2007003676 W CN2007003676 W CN 2007003676W WO 2009024000 A1 WO2009024000 A1 WO 2009024000A1
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domain
function unit
local
cross
path
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PCT/CN2007/003676
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French (fr)
Chinese (zh)
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Dingjun Li
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Zte Corporation
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/02—Topology update or discovery
    • H04L45/04—Interdomain routing, e.g. hierarchical routing

Definitions

  • the present invention relates to the field of communications, and in particular, to a cross-domain end-to-end path establishment method in a Next Generation Network (NGN).
  • NGN Next Generation Network
  • BACKGROUND Currently, how to implement end-to-end network resource allocation and control mechanism is one of the important issues of network resource admission control in next generation networks. With the technological development and gradual deployment of NGN networks, this issue will become very important.
  • ITU-NGN International Telecommunications Union Next Generation Network
  • RCF Resource Admission Control Function
  • FIG. 1 shows the structure of a RACF according to the related art. In the structure shown in FIG.
  • the Rc interface is responsible for the collection of network topology and resource information of the Transport Functions and the collection of feedback on resource usage during the operation of the network;
  • the Rs interface is responsible for the interaction between the Service Control Layer (SCF) and the Policy Decision Function Unit (PD-FE) of the Transport Network Control Layer (RACF) for service session abstract resource requests;
  • the Rt interface is responsible for the policy decision function unit PD-FE and the transport network resource control function unit.
  • TRC-FE performing related interactions between request and allocation of session network resources
  • the Ri interface is responsible for cross-domain communication between PD-FEs
  • the Rp interface is responsible for the I or internal communication between the TRC-FEs; the specific functions of each functional unit and interface are defined in the ITU-T Y.RACF standard and other related standards, and will not be repeated here (the Rj interface in Figure 1) Is the interface set up to implement the session path establishment, which will be described later).
  • the other two methods can complete the end-to-end path establishment in some information that needs to be closely related to the transport network technology.
  • the end-to-end path cannot be established because:
  • PD-FE is a functional unit that focuses on the relevant policy decisions of transport technology independent. It does not have information related to the technology of the bearer network, so it cannot guide the establishment of the path related to the bearer network technology; Moreover, the SCF also transmits service-related signaling, and does not have the ability to guide the establishment of paths related to the bearer network technology.
  • the manner in which the transport network itself establishes a cross-domain end-to-end path along with the path signaling has scalability problems, which is not conducive to widespread deployment. Moreover, an effective scheme for establishing a cross-domain end-to-end path has not yet been proposed.
  • a cross-domain end-to-end path establishment method includes: Step S502: The local domain policy decision function unit sends a local path establishment request of the session to the local resource transmission control unit, and the local transmission resource control function unit receives the local path establishment request of the session.
  • Step S504 the local domain transmission resource control function unit sends a session request to the peer domain transmission resource control function unit by using the cross-domain interface between the local domain transmission resource control function unit and the peer domain transmission resource control function unit, and the path in the domain.
  • the peer domain transmission resource control function unit receives the cross-domain session request and the path establishment related information, performs the path calculation and the resource allocation in the peer domain, and generates related information about the path establishment in the peer domain.
  • Step S506 The local domain transmission resource control function unit and the peer domain transmission resource control function unit notify each other of the path establishment information in their respective domains through the cross-domain interface, and inform the corresponding domain entry node of the path establishment related information.
  • the local domain policy decision function unit sends a local end-to-end path establishment request of the session to the local resource transmission control unit.
  • the related information of the path establishment information includes: an egress node information, and a packet encapsulation information.
  • the above i or interface is an Rj interface
  • the contention interface delivers information related to the transport network.
  • the network is the next generation network.
  • FIG. 1 is a block diagram of a RACF according to the related art
  • FIG. 2 is a schematic diagram of cross-domain end-to-end path establishment by a Ri interface between policy decision function units according to the related art
  • 3 is a schematic diagram of implementing domain end-to-end path establishment through an Rj interface according to an embodiment of the present invention
  • FIG. 4 is a cross-domain end-to-end path establishment method for a RACF structure shown in FIG. 1 according to an embodiment of the present invention
  • FIG. 5 is a flow chart of a cross-domain end-to-end path establishment method according to an embodiment of the present invention.
  • a cross-domain end-to-end path establishment method is provided, which is a core technology for collecting network topology resources in a next generation network.
  • the method implements cross-domain communication between the transmission resource control function unit (TRC-FE) in the NGN network to implement the cross-domain end-to-end path establishment method related to the bearer network technology, and realizes the cross-domain related technology of the bearer network technology.
  • TRC-FE transmission resource control function unit
  • the establishment of the end-to-end path of the domain solves the problem that the cross-domain end-to-end path establishment cannot be completed due to the need to use the information related to the bearer network technology in the related art. Embodiments of the present invention will be described in detail below. As shown in FIG.
  • the establishment of a cross-domain end-to-end path in a next generation network is implemented through an Rj interface (ie, the above-described cross-domain interface).
  • the Rj interface shown in FIG. 3 will include a plurality of network 4 mesh connections including a transport network and a transit network, and implement two user terminal devices (user terminal devices #1 and #2).
  • the Rj interface connects the local transmission resource control function unit (TRC-FE) to the peer domain transmission resource control function unit.
  • Transmission network related information As shown in FIG. 5, the method includes: Step S502: The local domain policy decision function unit sends a local path establishment request of the session to the local resource transmission control unit, and the local domain transmits the resource.
  • the control function unit After receiving the path establishment request in the local domain of the session, the control function unit performs path calculation and resource allocation in the local domain, and generates related information about path establishment in the local domain; Step S504, the local transmission resource control function unit transmits the resource control function unit through the local domain.
  • Step S506 the local domain transmission resource control function unit and the peer domain transmission resource control function unit notify each other of the path establishment information in their respective domains through the Rj interface, and inform the respective domain of the path establishment related information.
  • a transmission resource execution function unit of the ingress node and in step S508, the transmission resource execution function unit of the local domain and the transmission resource execution function unit of the peer domain respectively identify and process related information of the path established by the respective domain, and establish Connect and allocate resources.
  • the local domain policy decision function unit sends a local end-to-end path establishment request of the session to the local resource transmission control unit.
  • the related information of the path establishment information includes: an egress node information, and a packet encapsulation information.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

A cross-domain end-to-end path establishment method is disclosed. A cross-domain interface is set between a local domain transmitting resource control function unit and an opposite terminal domain transmitting resource control function unit. The local domain transmitting resource control function unit and the opposite terminal domain transmitting resource control function unit establish a cross-domain end-to-end path by the cross-domain interface. The cross-domain interface transmits the information corresponding to a transmission network. By using the method, the problem that a service control function and a strategy decision function unit can't complete establishing the cross-domain end-to-end path corresponding to a bearing network technique closely can be solved.

Description

跨域端到端路径建立方法 技术领域 本发明涉及通信领域， 并且特别地， 涉及下一代网络 （NGN ) 中跨域 端到端 ( end-to-end ) 路径建立方法。 背景技术 目前，如何实现端到端网络资源分配和控制的机制是下一代网络中网络 资源接纳控制的重要问题之一。 随着 NGN 网络的技术发展和逐渐部署， 这 一问题将变得非常重要。 在目前的国际电信领盟下一代网络 （ITU-NGN ) 资源分配与控制功能 子系统 （即， 资源接纳控制功能 （RACF ), 其结构如图 1所示） 的相关定义 中 （主要是 Y.RACF ( Y.21 11 ) 标准中定义）， 传送网2 域端到端路径的建立 的方式分为三种， 第一种是通过业务层业务控制功能单元 SCF (业务控制功 能）之间的业务信令完成； 第二种是通过传送网本身随路的信令完成； 第三 种是通过传送控制层的资源接纳控制子系统中策略决策功能单元 （ PD-FE ) 实体之间的跨域接口 Ri接口完成 （其具体实现如图 2所示）。 图 1示出了根据相关技术的 RACF的结构。 在图 1 所示的结构中， 包括以下功能单元： 传送资源执行功能单元 ( Transport Resource Enforcement Function Entity , TRE-FE )、 策略执 4亍功^ < 单元 （ Policy Enforcement Function Entity , PE-FE )、 传送资源控制功能单元 ( Transport Resource Control Function Entity , TRC-FE )、 策略决策功能单元 ( Policy Decision Function Entity , PD-FE )、 以及资源接纳控制功能（ Resource Admission Control Function , RACF )。 在上述功能单元之间的各个接口的功能如下： Rc 接口负责传送网络 ( Transport Functions ) 的网络拓朴和资源信息的收集以及网络运行过程中的 资源使用情况收集反馈； BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of communications, and in particular, to a cross-domain end-to-end path establishment method in a Next Generation Network (NGN). BACKGROUND Currently, how to implement end-to-end network resource allocation and control mechanism is one of the important issues of network resource admission control in next generation networks. With the technological development and gradual deployment of NGN networks, this issue will become very important. In the current definition of the International Telecommunications Union Next Generation Network (ITU-NGN) resource allocation and control function subsystem (ie, the Resource Admission Control Function (RACF), whose structure is shown in Figure 1) (mainly Y. As defined in the RACF (Y.21 11) standard, there are three ways to establish an end-to-end path in the transport network 2 domain. The first is to control the service between the functional units SCF (service control function) through the service layer. The signaling is completed; the second is completed by the signaling of the transport network itself; the third is the cross-domain interface between the Policy Decision Function Units (PD-FE) entities in the resource admission control subsystem of the transport control layer. The Ri interface is completed (the specific implementation is shown in Figure 2). FIG. 1 shows the structure of a RACF according to the related art. In the structure shown in FIG. 1, the following functional units are included: a Transport Resource Enforcement Function Entity (TRE-FE), a Policy Enforcement Function Entity (PE-FE), Transport Resource Control Function Entity (TRC-FE), Policy Decision Function Entity (PD-FE), and Resource Admission Control Function (RACF). The functions of the various interfaces between the above functional units are as follows: The Rc interface is responsible for the collection of network topology and resource information of the Transport Functions and the collection of feedback on resource usage during the operation of the network;
Rs接口负责业务控制层 （SCF ) 与传送网控制层 （RACF ) 的策略决策 功能单元 （PD-FE ) 进行业务会话抽象资源请求的相关交互； Rt 接口负责策略决策功能单元 PD-FE 与传送网资源控制功能单元The Rs interface is responsible for the interaction between the Service Control Layer (SCF) and the Policy Decision Function Unit (PD-FE) of the Transport Network Control Layer (RACF) for service session abstract resource requests; The Rt interface is responsible for the policy decision function unit PD-FE and the transport network resource control function unit.
( TRC-FE ) 进行会话网络资源的请求与分配的相关交互； (TRC-FE) performing related interactions between request and allocation of session network resources;
Ri接口负责 PD-FE之间的跨域通信； The Ri interface is responsible for cross-domain communication between PD-FEs;
Rp接口负责 TRC-FE之间的 I或内通信； 在 ITU-T Y.RACF标准及其他相关标准中定义了各功能单元及接口的具 体功能， 这里将不再重复（图 1 中的 Rj接口是为实现会话路径建立所设置的 接口， 该接口将在后面进行描述）。 在基于该结构的上述三种方式中，除第二种能够完全保证跨域端到端路 径的建立外， 另外两种方法在有些需要与传送网技术紧密相关的信息才能完 成端到端路径建立的情况下 （例如， 使用 MPLS-TE技术的网络中） 无法完 成端到端路径的建立， 这是因为： The Rp interface is responsible for the I or internal communication between the TRC-FEs; the specific functions of each functional unit and interface are defined in the ITU-T Y.RACF standard and other related standards, and will not be repeated here (the Rj interface in Figure 1) Is the interface set up to implement the session path establishment, which will be described later). In the above three modes based on the structure, except for the second type, which can completely guarantee the establishment of the cross-domain end-to-end path, the other two methods can complete the end-to-end path establishment in some information that needs to be closely related to the transport network technology. In the case (for example, in a network using MPLS-TE technology), the end-to-end path cannot be established because:
PD-FE是专注于^栽网络 4支术无关 （ transport technology independent ) 的相关策略决策的功能单元， 它没有与承栽网技术相关的信息， 因此无法指 导承栽网技术相关的路径的建立； 并且， SCF之间传递的也是业务相关的信令， 不具备指导承栽网技术相 关的路径的建立的能力。 而在第二种方法中，传送网本身随路信令建立跨域端到端路径的方式又 存在扩展性等方面的问题， 不利于广泛部署。 并且， 目前尚未提出建立跨域端到端路径的有效方案。 发明内容 考虑到上述问题而做出本发明， 为此， 本发明的主要目的在于提供一种 争域端到端路径建立方案。 根据本发明的实施例， 提供了一种跨域端到端路径建立方法。 该方法包括： 步骤 S502 , 网络中本域策略决策功能单元向本域传送资 源控制功能单元发送会话的本域内路径建立请求， 并且， 本域传送资源控制 功能单元收到会话的本域内路径建立请求后进行本域内的路径计算和资源分 S己， 生成本域内路径建立的相关信息； 步骤 S504, 本域传送资源控制功能单元通过本域传送资源控制功能单 元与对端域传送资源控制功能单元之间的跨域接口向对端域传送资源控制功 能单元发送会话请求、 以及本域内路径建立的相关信息， 对端域传送资源控 制功能单元收到跨域会话请求和路径建立的相关信息后进行对端域内的路径 计算和资源分配， 生成对端域内路径建立的相关信息； 步骤 S506 , 本域传送资源控制功能单元和对端域传送资源控制功能单 元通过跨域接口单向或相互通知其各自所在域内的路径建立的相关信息， 并 将路径建立的相关信息告知其各自所在域入口节点的传送资源执行功能单 元； 以及 步骤 S508 , 本域的传送资源执行功能单元和对端域的传送资源执行功 能单元分别对其各自所在域的路径建立的相关信息进行处理， 建立连接并分 配资源。 其中， 在步骤 S502中， 本域策略决策功能单元向本域传送资源控制功 能单元发送会话的本域内端到端路径建立请求。 并且， 路径建立信息的相关信息包括： 出口节点信息、 以及数据包封装 信息。 此外， 在该方法中， 上述 i或接口为 Rj接口， 并且争域接口传递与传 输网相关的信息。 并且， 网络为下一代网络。 通过本发明的上述技术方案，解决了业务控制功能和策略决策功能单元 无法完成与承栽网技术紧密相关的跨域端到端路径建立的问题。 附图说明 此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部 分， 本发明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的 不当限定。 在附图中： 图 1是根据相关技术的 RACF的框图； 图 2是根据相关技术的通过策略决策功能单元之间的 Ri接口进行跨域 端到端路进建立的示意图； 图 3是根据本发明实施例的通过 Rj接口实现 域端到端路径建立的示 意图； 图 4是将根据本发明实施例的跨域端到端路径建立方法用于图 1所示的 RACF结构的示意图； 以及 图 5是根据本发明实施例的跨域端到端路径建立方法的流程图。 具体实施方式 在本实施例中， 提供了一种跨域端到端路径建立方法， 该方法是下一代 网络中收集网络拓朴资源的核心技术。 其中， 该方法在 NGN 网络中传送资 源控制功能单元（ TRC-FE )之间进行跨域通信来实现承栽网技术相关的跨域 端到端路径建立的方法， 实现了承栽网技术相关的跨域端到端路径的建立， 解决了相关技术中由于需要使用承栽网技术相关的信息而无法完成跨域端到 端路径建立的问题。 下面将详细描述本发明的实施例。 如图 3所示， 在该方法中， 通过 Rj接口 （即， 上述的跨域接口 ） 实现 下一代网络中跨域端到端路径的建立。图 3中所示的 Rj接口将包括传输网络 ( transport network )和^"接网络（ transit network ) 的多个网络 4目连接， 实现 了两个用户终端设备 （用户终端设备 # 1和 # 2 ) 之间的跨域路径建立。 具体地， 如图 4所示， Rj接口将本域传送资源控制功能单元（ TRC-FE ) 与对端域传送资源控制功能单元相连接。 其中， Rj接口传递与传输网相关的 信息。 如图 5所示， 该方法包括： 步骤 S502 , 网络中本域策略决策功能单元 向本域传送资源控制功能单元发送会话的本域内路径建立请求， 并且， 本域 传送资源控制功能单元收到会话的本域内路径建立请求后进行本域内的路径 计算和资源分配， 生成本域内路径建立的相关信息； 步骤 S504 , 本域传送资源控制功能单元通过本域传送资源控制功能单 元与对端域传送资源控制功能单元之间的 Rj 接口向对端域传送资源控制功 能单元发送会话请求、 以及本域内路径建立的相关信息， 对端域传送资源控 制功能单元收到跨域会话请求和路径建立的相关信息后进行对端域内的路径 计算和资源分配， 生成对端域内路径建立的相关信息； 步骤 S506 , 本域传送资源控制功能单元和对端域传送资源控制功能单 元通过 Rj接口单向或相互通知其各自所在域内的路径建立的相关信息，并将 路径建立的相关信息告知其各自所在域入口节点的传送资源执行功能单元； 以及 步骤 S508 , 本域的传送资源执行功能单元和对端域的传送资源执行功 能单元分别对其各自所在域的路径建立的相关信息进行识别和相关处理， 建 立连接并分配资源。 其中， 在步骤 S502中， 本域策略决策功能单元向本域传送资源控制功 能单元发送会话的本域内端到端路径建立请求。 并且， 路径建立信息的相关信息包括： 出口节点信息、 以及数据包封装 信息。 综上所述， 借助于本发明的技术方案， 解决了业务控制功能和策略决策 功能单元无法完成与承栽网技术紧密相关的跨域端到端路径建立的问题。 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。 PD-FE is a functional unit that focuses on the relevant policy decisions of transport technology independent. It does not have information related to the technology of the bearer network, so it cannot guide the establishment of the path related to the bearer network technology; Moreover, the SCF also transmits service-related signaling, and does not have the ability to guide the establishment of paths related to the bearer network technology. In the second method, the manner in which the transport network itself establishes a cross-domain end-to-end path along with the path signaling has scalability problems, which is not conducive to widespread deployment. Moreover, an effective scheme for establishing a cross-domain end-to-end path has not yet been proposed. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is a primary object of the present invention to provide a dispute domain end-to-end path establishment scheme. According to an embodiment of the present invention, a cross-domain end-to-end path establishment method is provided. The method includes: Step S502: The local domain policy decision function unit sends a local path establishment request of the session to the local resource transmission control unit, and the local transmission resource control function unit receives the local path establishment request of the session. After the path calculation and resource division in the domain are performed, relevant information about path establishment in the domain is generated; Step S504, the local domain transmission resource control function unit sends a session request to the peer domain transmission resource control function unit by using the cross-domain interface between the local domain transmission resource control function unit and the peer domain transmission resource control function unit, and the path in the domain. After the related information is established, the peer domain transmission resource control function unit receives the cross-domain session request and the path establishment related information, performs the path calculation and the resource allocation in the peer domain, and generates related information about the path establishment in the peer domain. Step S506 The local domain transmission resource control function unit and the peer domain transmission resource control function unit notify each other of the path establishment information in their respective domains through the cross-domain interface, and inform the corresponding domain entry node of the path establishment related information. The transmission resource execution function unit; and in step S508, the transmission resource execution function unit of the local domain and the transmission resource execution function unit of the peer domain respectively process related information of the path establishment of the respective domain, establish a connection and allocate resources. In step S502, the local domain policy decision function unit sends a local end-to-end path establishment request of the session to the local resource transmission control unit. Moreover, the related information of the path establishment information includes: an egress node information, and a packet encapsulation information. Moreover, in the method, the above i or interface is an Rj interface, and the contention interface delivers information related to the transport network. And, the network is the next generation network. Through the above technical solution of the present invention, the problem that the service control function and the policy decision function unit cannot complete the cross-domain end-to-end path establishment closely related to the bearer network technology is solved. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a block diagram of a RACF according to the related art; FIG. 2 is a schematic diagram of cross-domain end-to-end path establishment by a Ri interface between policy decision function units according to the related art; 3 is a schematic diagram of implementing domain end-to-end path establishment through an Rj interface according to an embodiment of the present invention; FIG. 4 is a cross-domain end-to-end path establishment method for a RACF structure shown in FIG. 1 according to an embodiment of the present invention; FIG. 5 is a flow chart of a cross-domain end-to-end path establishment method according to an embodiment of the present invention. DETAILED DESCRIPTION In this embodiment, a cross-domain end-to-end path establishment method is provided, which is a core technology for collecting network topology resources in a next generation network. The method implements cross-domain communication between the transmission resource control function unit (TRC-FE) in the NGN network to implement the cross-domain end-to-end path establishment method related to the bearer network technology, and realizes the cross-domain related technology of the bearer network technology. The establishment of the end-to-end path of the domain solves the problem that the cross-domain end-to-end path establishment cannot be completed due to the need to use the information related to the bearer network technology in the related art. Embodiments of the present invention will be described in detail below. As shown in FIG. 3, in the method, the establishment of a cross-domain end-to-end path in a next generation network is implemented through an Rj interface (ie, the above-described cross-domain interface). The Rj interface shown in FIG. 3 will include a plurality of network 4 mesh connections including a transport network and a transit network, and implement two user terminal devices (user terminal devices #1 and #2). Specifically, as shown in FIG. 4, the Rj interface connects the local transmission resource control function unit (TRC-FE) to the peer domain transmission resource control function unit. Transmission network related information. As shown in FIG. 5, the method includes: Step S502: The local domain policy decision function unit sends a local path establishment request of the session to the local resource transmission control unit, and the local domain transmits the resource. After receiving the path establishment request in the local domain of the session, the control function unit performs path calculation and resource allocation in the local domain, and generates related information about path establishment in the local domain; Step S504, the local transmission resource control function unit transmits the resource control function unit through the local domain. Sending a session request to the peer domain transmission resource control function unit with the Rj interface between the peer domain transmission resource control function unit And the related information of the path establishment in the domain, the peer domain transmission resource control function unit receives the cross-domain session request and the path establishment related information, and then performs path calculation and resource allocation in the peer domain, and generates related information about the path establishment in the peer domain. ; Step S506, the local domain transmission resource control function unit and the peer domain transmission resource control function unit notify each other of the path establishment information in their respective domains through the Rj interface, and inform the respective domain of the path establishment related information. a transmission resource execution function unit of the ingress node; and in step S508, the transmission resource execution function unit of the local domain and the transmission resource execution function unit of the peer domain respectively identify and process related information of the path established by the respective domain, and establish Connect and allocate resources. In step S502, the local domain policy decision function unit sends a local end-to-end path establishment request of the session to the local resource transmission control unit. Moreover, the related information of the path establishment information includes: an egress node information, and a packet encapsulation information. In summary, with the technical solution of the present invention, the problem that the service control function and the policy decision function unit cannot complete the cross-domain end-to-end path establishment closely related to the bearer network technology is solved. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

权 利 要 求 书 一种 域端到端路径建立方法， 其特征在于， 包括： Claims A method for establishing a domain end-to-end path, characterized in that it comprises:
步骤 S502 , 网络中本域策略决策功能单元向本域传送资源控制功 能单元发送会话的本域内路径建立请求， 并且， 所述本域传送资源控制 功能单元收到所述会话的本域内路径建立请求后进行所述本域内的路径 计算和资源分配， 生成所述本域内路径建立的相关信息；  Step S502: The local domain policy decision function unit sends a local path establishment request of the session to the local resource transmission control unit, and the local transmission resource control function unit receives the local path establishment request of the session. Performing path calculation and resource allocation in the local domain to generate related information about path establishment in the local domain;
步骤 S504 , 所述本域传送资源控制功能单元通过所述本域传送资 源控制功能单元与对端域传送资源控制功能单元之间的跨域接口向所述 对端域传送资源控制功能单元发送会话请求、 以及所述本域内路径建立 的相关信息， 所述对端域传送资源控制功能单元收到所述跨域会话请求 和所述路径建立的相关信息后进行所述对端域内的路径计算和资源分 配， 生成所述对端域内路径建立的相关信息；  Step S504, the local domain transmission resource control function unit sends a session to the peer domain transmission resource control function unit by using a cross-domain interface between the local domain transmission resource control function unit and the peer domain transmission resource control function unit. And the related information of the path establishment in the local domain, the peer end transmission resource control function unit performs the path calculation in the peer domain after receiving the cross-domain session request and the related information about the path establishment. Resource allocation, generating related information about path establishment in the peer domain;
步骤 S506 , 所述本域传送资源控制功能单元和所述对端域传送资 源控制功能单元通过所述跨域接口单向或相互通知其各自所在域内的所 述路径建立的相关信息， 并将所述路径建立的相关信息告知其各自所在 域入口节点的传送资源执行功能单元； 以及  Step S506, the local domain transmission resource control function unit and the peer end domain transmission resource control function unit unidirectionally or mutually notify the related information established by the path in their respective domains through the cross-domain interface, and The related information of the path establishment informs the transmission resource execution function unit of the entry node of the respective domain; and
步骤 S508 , 所述本域的传送资源执行功能单元和所述对端域的传 送资源执行功能单元分别对其各自所在域的所述路径建立的相关信息进 行处理， 建立连接并分配资源。 根据权利要求 1 所述的跨域端到端路径建立方法， 其特征在于， 在所述 步骤 S502中，所述本域策略决策功能单元向所述本域传送资源控制功能 单元发送会话的本域内端到端路径建立请求。 根据权利要求 1或 2所述的 域端到端路径建立方法， 其特征在于， 所 述路径建立信息的相关信息包括： 出口节点信息、 以及数据包封装信息。 根据权利要求 1或 2所述的跨域端到端路径建立方法， 其特征在于， 所 述跨域接口为 Rj接口， 并且所述跨域接口传递与传输网相关的信息。 根据权利要求 1或 2所述的跨域端到端路径建立方法， 其特征在于， 所 述网络为下一代网络。  Step S508, the transmission resource execution function unit of the local domain and the transmission resource execution function unit of the opposite domain respectively process related information about the path established by the respective domain, establish a connection, and allocate resources. The cross-domain end-to-end path establishment method according to claim 1, wherein in the step S502, the local domain policy decision function unit sends a session in the local domain to the local domain transmission resource control function unit. End-to-end path setup request. The domain end-to-end path establishing method according to claim 1 or 2, wherein the related information of the path establishment information comprises: egress node information, and data packet encapsulation information. The method for establishing a cross-domain end-to-end path according to claim 1 or 2, wherein the cross-domain interface is an Rj interface, and the cross-domain interface delivers information related to the transport network. The cross-domain end-to-end path establishing method according to claim 1 or 2, wherein the network is a next generation network.
PCT/CN2007/003676 2007-08-23 2007-12-19 Cross-domain end-to-end path establishment method WO2009024000A1 (en)

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