WO2007085149A1 - Method for accomplishing fast handover of mobile node based on multi protocol label switching network and mobile node user equipment - Google Patents

Method for accomplishing fast handover of mobile node based on multi protocol label switching network and mobile node user equipment Download PDF

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Publication number
WO2007085149A1
WO2007085149A1 PCT/CN2006/002088 CN2006002088W WO2007085149A1 WO 2007085149 A1 WO2007085149 A1 WO 2007085149A1 CN 2006002088 W CN2006002088 W CN 2006002088W WO 2007085149 A1 WO2007085149 A1 WO 2007085149A1
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WIPO (PCT)
Prior art keywords
ler
mobile node
node user
mobile
target
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PCT/CN2006/002088
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French (fr)
Chinese (zh)
Inventor
Gang Cheng
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Huawei Technologies Co., Ltd.
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Publication of WO2007085149A1 publication Critical patent/WO2007085149A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route
    • H04W40/36—Modification of an existing route due to handover
    • 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
    • H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]

Definitions

  • the present invention relates to the field of network communications, and in particular, to a method for implementing fast handover of a mobile node of an MPLS (Multi-Protocol Label Switching) network and a mobile node user equipment.
  • MPLS Multi-Protocol Label Switching
  • NGN Next Generation Network
  • IP packet technology
  • telecommunication services such as voice, image and data through IP connectivity between communication entities. Converged network.
  • NGN service functions 'the need to address the quality of service, security reliability, operational and manageability of IP bearer networks.
  • the NGN network supports mobile communication between mobile nodes and fixed networks and mobile networks between different networks of fixed and wireless networks.
  • Three different networks are proposed in the Y.mpls-mob draft standard.
  • the hierarchical mobility models are intm-access (internet access), inter-access (inter-subnet access), and inter-network (inter-network access).
  • the three different network-level mobile models are shown in Figure 1. Shown.
  • MPLS provides signaling and transport mechanisms to support QoS, traffic engineering, and VPN functions.
  • QoS Quality of Service
  • LSP label switched path
  • LSP path optimization refers to the process of establishing a new LSP path with the communication node user in order to reduce the transmission delay and more effectively utilize the system resources after the mobile node user moves to the new area.
  • the mobile node user based on the multi-protocol label switching MPLS network establishes the target LER/FA of the mobile node user before moving in the same upper-level LER jurisdiction area governed by different label edge routers/foreign agents LER/FA Describe the label switched path LSP of the primary LER;
  • the mobile node user of the MPLS network establishes a label switched path LSP with the LER/RFA before moving in the same OLT/RFA jurisdictional area of the same label edge router/region foreign agent LER/RFA.
  • the step A1 specifically includes:
  • one or more target LER/FAs of the mobile node user receive a mobile negotiation request sent by the current LER/FA of the mobile node user, and negotiate with the current LER/FA to determine a next mobile node user Handing over the address CoA, the target LER/FA sends an LSP request to the LER/RPA;
  • the LER/RFA establishes an LSP with the target LER/FA according to the establishment LSP request, and the LER/RPA sends an establishment LSP response to the target LER/FA.
  • the step Al l specifically includes:
  • the mobile node user sends a mobile request to the current LER/FA of the mobile node user before moving in the same LER/RPA-administered area, where the mobile request carries information of the target area to which the mobile node user needs to move;
  • the current LER/FA After receiving the mobile request, the current LER/FA obtains information about a target area to which the mobile node user needs to move, and sends a mobile negotiation request to one or more target LER/FAs of the target area.
  • the step A12 includes: after receiving the setup LSP response, the target LER/FA sends a mobile negotiation response to the current LER/FA, and the current LER/FA sends a mobile response to the mobile node user,
  • the LER/RJFA also sends data to the mobile node and the one or more LSPs simultaneously.
  • the step B includes: after the mobile node user moves to the target area, obtains the next CoA by using the target LER/FA, and registers the next CoA with the core network CN, by using the established The LSP interacts with the LER/RFA.
  • the step A specifically includes: A2.
  • the mobile node user based on the MPLS network establishes the target LER/FA of the mobile node user before moving in the area under the same label edge router/gateway foreign agent LER/GFA jurisdiction. LSP of LER/GFA.
  • One or more target LER/FAs of the mobile node user receive the mobile a mobile negotiation request sent by the current LER/FA of the node user, and negotiating with the current LER/FA to determine a next care-of address CoA of the mobile node user, and the target LER/FA sends an establishment LSP request to the LER/GFA;
  • the LER/GFA establishes an LSP with the target LER/FA according to the establishment LSP request, and the LER/GFA sends an establishment LSP response to the target LER/FA.
  • the step A21 includes:
  • the mobile node user sends a mobile request to the current LER/FA of the mobile node user before moving in the same LER/GFA jurisdiction, and the mobile request carries information of the target area to which the mobile node user needs to move;
  • the current LER/FA After receiving the mobile request, the current LER/FA obtains information about a target area to which the mobile node user needs to move, and sends a mobile negotiation request to one or more target LER/FAs of the target area.
  • the step A22 includes:
  • the target LER/FA After receiving the setup LSP response, the target LER/FA sends a mobile negotiation response to the current LER/FA, where the current LER/FA sends a mobile response to the mobile node user, and the LER/GFA also sends the mobile node to the mobile node. Transmitting data simultaneously with the one or more LSPs.
  • the mobile node user moves to the target area, obtains the next CoA by using the target LER/FA, registers the next CoA with the CN, and performs data with the LER/GFA through the established LSP. Interaction.
  • the method further includes: when the mobile node user of the MPLS network moves in the same LER/FA jurisdiction, the mobile node user does not establish an LSP path, and still uses its existing CoA and the LER/FA for data interaction. .
  • the present invention also provides a mobile node user equipment, where the mobile node user equipment is provided with an early trigger module;
  • Trigger module in advance: Used for mobile node users in different LER/FA jurisdictions, the same one Before moving in the area governed by the LER, the mobile node user is triggered to send a mobile request to its current LER/FA, where the mobile request carries information of the target area to which the mobile node user needs to move, so that the current LER/FA is directed to the target area.
  • One or more target LER7FAs send a mobile negotiation request to cause the target LER/FA to establish an LSP path with the upper LER.
  • the upper level LER is LER/RFA or LER/GFA.
  • the present invention is directed to the three network mobility models described in Y.mpls-mob, and proposes a scheme for implementing fast handover by mobile node users based on the MPLS network.
  • its target LER/FA Before the mobile node user moves, its target LER/FA first establishes an LSP with LER/RFA or GFA (Regional Foreign Agent/Gateway Foreign Agent). Thereby, the delay of the mobile node user to establish a new communication path is reduced or eliminated, and fast switching is achieved.
  • More efficient use of system resources can promote operators to carry out various services of NGN based on MPLS network.
  • Figure 1 is a schematic diagram of three different network-level mobility models proposed in the Y.mpl S- mob draft standard
  • FIG. 2 is a process flow diagram of an embodiment of the method of the present invention for an inter-access network mobility model
  • FIG. 3 is a process flow diagram of an embodiment of the method of the present invention for an inter-network network mobility model. Mode for carrying out the invention
  • the present invention provides a method for implementing fast handover of an MPLS network mobile node.
  • the core of the present invention is: Before the mobile node user of the MPLS network moves, the target LER/FA of the mobile node user has established with the LER/RFA or GFA. LSP 0
  • the present invention is directed to the three network mobility models described in the above Y.mpls-mob, and proposes three methods and processes for fast handover of mobile node users in an MPLS network.
  • the method of the present invention is described in detail below with reference to the accompanying drawings.
  • the processing flow of the embodiment of the method of the present invention is as shown in FIG. 2, and includes the following steps: Step 21: Based on the MPLS network
  • the mobile node user begins to send a move request to the current LER/FA of the current area of the mobile node user before moving in the same LER7RFA governed area.
  • the mobile request carries information of a target area to which the mobile node user needs to move.
  • Step 22 After receiving the mobile request, the current LER/FA of the current area of the mobile node user obtains information about the target area to which the mobile node user needs to move, and sends the mobile to one or more target LER7FAs of the target area of the mobile node user.
  • the request After the one or more target LER/FAs negotiate with the current LER/FA, the new CoA of the mobile node user is determined.
  • Step 23 The one or more target LER/FA sends an LSP request to the LER/RP A of the mobile node user to request to establish an LSP between the LER and the RFA.
  • Step 24 After the establishment of the LSP between the one or more target LER/FAs and the LER/RPA of the mobile node user is completed, the LER/RPA sends an establishment LSP response to the one or more target LER/FAs. The LER/RFA also transmits data to the mobile node and the one or more LSPs simultaneously.
  • Step 25 The one or more target LER/FAs send a mobile negotiation response to the current LER/FA.
  • Step 26 The current LER/FA sends a mobile response to the mobile node user, and notifies the mobile node user that the mobile node can move to the target area.
  • the mobile node user's service is not interrupted because the one or more target LER/FAs have established an LSP path with the LER/RFA.
  • the LER/RJFA is responsible for forwarding the data message of the mobile node user to the one or more target LER/FAs of the target area through the newly created LSP.
  • the mobile node user obtains a new CoA address through one or more target LER/FAs of the target area, and registers the new CoA address with the CN.
  • Step 31 The mobile node user based on the MPLS network starts to send a move request to the current LER/FA of the current area of the mobile node user before moving in the different LER/RFA jurisdiction of the same LER/GFA jurisdiction.
  • the mobile request carries information of a target area to which the mobile node user needs to move.
  • Step 32 After receiving the mobile request, the current LER/FA of the current area of the mobile node user obtains information of the target area to which the mobile node user needs to move, and one or more target LER/FAs of the target area of the mobile node user. Send a mobile negotiation request. After the one or more target LER/FAs negotiate with the current LER/FA, the new CoA of the mobile node user is determined.
  • Step 33 The one or more target LER/FA sends an LSP request to the LER/GFA of the mobile node user to request to establish an LSP between the LER and the GFA.
  • Step 34 After the establishment of the LSP between the one or more target LER FAs and the LER/GFA of the mobile node user is completed, the LER/GFA sends an establishment LSP response to the one or more target LER/FAs. The LER/GFA also transmits data to the mobile node and the one or more LSPs simultaneously.
  • Step 35 The one or more target LER/FAs send a mobile negotiation response to the current LER/FA.
  • Step 36 The current LER/FA sends a mobile response to the mobile node user, and notifies the mobile node user that the mobile node can move to the target area.
  • the mobile node user's service is not interrupted because the one or more target LER/FAs have established an LSP path with the LER/GFA.
  • the LER/GFA is responsible for forwarding the data message of the mobile node user to the one or more target LER/FAs of the target area through the newly created LSP.
  • the mobile node user obtains a new CoA address through one or more target LER/FAs of the target area, and registers the new CoA address with the CN.
  • the description of the embodiment of the method of the present invention is as follows: Since the mobile node user's mobile range is limited to the same LER/FA jurisdictional area, the mobile node user does not have to move before moving. Establish a new LSP path. Mobile node user movement After reaching the target area, the original CoA and the LER/FA are still used for data interaction.
  • the invention also provides a mobile node user equipment, wherein the mobile node user equipment is provided with an advance trigger module.
  • the early triggering module is mainly used for the mobile node user to send a mobile request to the current LER/FA before the mobile node user moves in the same LER/FA jurisdiction and the same upper LER jurisdiction, and the mobile request carries the mobile
  • the primary LER sends an LSP request to establish an LSP path with the upper LER.
  • the superior LER here is LER/RFA or LER/GFA.
  • the processing procedure of the current LER/FA, the target LER/FA, and the LER/RJFA, LER/GFA of the mobile node user in the present invention is as described in the above method, and will not be described in detail herein.

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Abstract

A method for accomplishing fast handover of mobile node based on MPLS (multi protocol label switching) network and mobile node user equipment. The method primarily includes: a mobile node user based on MPLS network moves through areas managed by different LER/FAs (label edge router/ foreign agent) which are managed by the same higher order LER, the target LER/FA of the mobile user establishes a label switching path LSP to the higher order LER; transferring data through the established LSP after the mobile node user has moved in the target area. This invention can accomplish fast handover of mobile node user based on MPLS network in the three network moving models described by Y.mpls-mob, and decrease or eliminate delays for establishing a new communication path of mobile node user.

Description

多协议标签交换网络移动节点实现快速切换的方法和移动节点用户设备 技术领域  Multi-protocol label switching network mobile node implementing fast handover method and mobile node user equipment
本发明涉及网络通讯领域， 尤其涉及一种 MPLS (多协议标签交换） 网 络移动节点实现快速切换的方法和移动节点用户设备。 发明背景  The present invention relates to the field of network communications, and in particular, to a method for implementing fast handover of a mobile node of an MPLS (Multi-Protocol Label Switching) network and a mobile node user equipment. Background of the invention
NGN (Next Generation Network, 下一代网络） 是采用 IP等分组技术作 为承载网技术，并且融合固定通信和移动通信，通过通信实体之间的 IP连接 性来承载语音、 图像和数据等多种电信业务的融合网络。 为了实现 NGN业 务功能，'需要解决 IP承载网络的服务质量、 安全性 可靠性、可运营和可管 理等问题。  NGN (Next Generation Network) adopts packet technology such as IP as the bearer network technology, and combines fixed communication and mobile communication, and carries various telecommunication services such as voice, image and data through IP connectivity between communication entities. Converged network. In order to implement NGN service functions, 'the need to address the quality of service, security reliability, operational and manageability of IP bearer networks.
NGN网络支持移动节点用户在固定网和无线网络之间的移动通信， 以 及在固定网和无线网络的不同网络层次之间的移动通信， Y.mpls-mob标准 草案中提出了三种不同的网络层次的移动模型， 分别是 intm-access (子网内 访问） 、 inter-access (子网间访问） 禾口 inter-network (网间访问） ， 上述三 种不同的网络层次的移动模型如图 1所示。  The NGN network supports mobile communication between mobile nodes and fixed networks and mobile networks between different networks of fixed and wireless networks. Three different networks are proposed in the Y.mpls-mob draft standard. The hierarchical mobility models are intm-access (internet access), inter-access (inter-subnet access), and inter-network (inter-network access). The three different network-level mobile models are shown in Figure 1. Shown.
由于大多数的移动网络已经过渡到使用 IP技术进行传输，并且大多数的 IP路由器支持 MPLS功能。 因此， 在固定和无线网络中， 基于 MPLS的移动 控制和传输功能的 NGN业务是目前研究的一个热点。 MPLS提供了信令和传 输机制用以支持 QoS、 流量工程和 VPN功能。 使用 MPLS技术可以比使用纯 IP技术更好地满足移动节点用户对 QoS (服务质量） 、 流量工程和 VPN业务 的需求。  Since most mobile networks have transitioned to use IP technology for transmission, most IP routers support MPLS. Therefore, in fixed and wireless networks, NGN services based on MPLS-based mobility control and transmission functions are currently a hot topic. MPLS provides signaling and transport mechanisms to support QoS, traffic engineering, and VPN functions. Using MPLS technology can better meet the needs of mobile node users for QoS (Quality of Service), traffic engineering and VPN services than using pure IP technology.
在移动节点用户从原所在区域移动到新区域的切换过程中， 一般需要 经过两个流程： LSP (标记交换路径） 路径扩展和 LSP路径优化。 LSP路径 扩展流程是指移动节点用户将新的 CoA (转交地址） 向 LER/HA (标签边缘 路由器 /家乡代理）注册的过程， 在该过程中， 新旧 LER/FA (标签边缘路由 器 /外地代理）之间建立双向 LSP路径， 用于移动节点用户和 CN节点间的通 信。 LSP路径优化流程是指移动节点用户移动到新的区域后， 为了减少传输 时延， 更有效地利用系统资源， 与通信节点用户之间建立新的 LSP路径的过 程。 ' 在上述移动节点用户的切换过程中， 由于切换产生的延迟将造成服务 中断， 如何使移动节点用户完成快速切换， 尤其是对那些需要实时服务移 动用户， 是基于 MPLS的移动传输中亟待解决的问题。 In the process of moving a mobile node user from the original area to the new area, there are generally two processes: LSP (label switched path) path extension and LSP path optimization. The LSP path extension process refers to the process in which a mobile node user registers a new CoA (care-of address) with LER/HA (label edge router/home agent). In the process, new and old LER/FA (label edge routing) A bidirectional LSP path is established between the mobile node user and the CN node. The LSP path optimization process refers to the process of establishing a new LSP path with the communication node user in order to reduce the transmission delay and more effectively utilize the system resources after the mobile node user moves to the new area. In the handover process of the mobile node user mentioned above, the delay caused by the handover will cause the service to be interrupted. How to enable the mobile node user to complete the fast handover, especially for mobile users who need real-time service, is urgently solved in the MPLS-based mobile transmission. problem.
在现有技术中，对于基于 MPLS网络的移动节点用户快速切换没有提供 具体的实现方法。 发明内容 本发明的目的是提供一种 MPLS网络移动节点实现快速切换的方法和 移动节点用户设备， 从而针对 Y.mpls-m0b中描述的三种网络移动模型， 提 出了基于 MPLS网络的移动节点用户实现快速切换的方案。 In the prior art, a specific implementation method is not provided for fast handover of a mobile node user based on an MPLS network. SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for implementing fast handover of an MPLS network mobile node and a mobile node user equipment, thereby proposing an MPLS network-based mobile for the three network mobility models described in Y.mpls-m 0 b A scheme for node users to implement fast switching.
本发明的目的是通过以下技术方案实现的：  The object of the invention is achieved by the following technical solutions:
一种多协议标签交换网络移动节点实现快速切换的方法， 包括步骤： A multi-protocol label switching network mobile node implementing a fast handover method includes the following steps:
A、 基于多协议标签交换 MPLS网络的移动节点用户在不同标签边缘路 由器 /外地代理 LER/FA管辖的同一个上一级 LER管辖的区域中移动前，该移 动节点用户的目标 LER/FA建立与所述上一级 LER的标记交换路径 LSP; A. The mobile node user based on the multi-protocol label switching MPLS network establishes the target LER/FA of the mobile node user before moving in the same upper-level LER jurisdiction area governed by different label edge routers/foreign agents LER/FA Describe the label switched path LSP of the primary LER;
B、 所述移动节点用户移动到目标区域后， 通过所述建立的 LSP进行数 据传输。  B. After the mobile node user moves to the target area, data transmission is performed by using the established LSP.
下述方法的技术方案为可选技术方案。  The technical solution of the following method is an optional technical solution.
所述的步骤 A具体包括：  The step A described specifically includes:
Al、 基于 MPLS网络的移动节点用户在同一个标签边缘路由器 /区域外 地代理 LER/RFA管辖的区域中移动前，该移动节点用户的目标 LER/FA建立 与所述 LER/RFA的标记交换路径 LSP。 所述的步骤 Al具体包括： Al. The mobile node user of the MPLS network establishes a label switched path LSP with the LER/RFA before moving in the same OLT/RFA jurisdictional area of the same label edge router/region foreign agent LER/RFA. The step A1 specifically includes:
Al 1、 所述移动节点用户的一个或不止一个目标 LER/FA接收所述移动 节点用户的当前 LER/FA发送的移动协商请求，并和所述当前 LER/FA协商确 定移动节点用户的下一个转交地址 CoA， 目标 LER/FA向所述 LER/RPA发送 建立 LSP请求；  Al1, one or more target LER/FAs of the mobile node user receive a mobile negotiation request sent by the current LER/FA of the mobile node user, and negotiate with the current LER/FA to determine a next mobile node user Handing over the address CoA, the target LER/FA sends an LSP request to the LER/RPA;
A12、 所述 LER/RFA根据建立 LSP请求与目标 LER/FA建立 LSP， 所述 LER/RPA向所述目标 LER/FA发送建立 LSP响应。  A12. The LER/RFA establishes an LSP with the target LER/FA according to the establishment LSP request, and the LER/RPA sends an establishment LSP response to the target LER/FA.
所述的步骤 Al l具体包括：  The step Al l specifically includes:
Al l l、 所述移动节点用户在同一个 LER/RPA管辖的区域中移动前， 向 移动节点用户的当前 LER/FA发送移动请求， 该移动请求中携带移动节点用 户需要移动到的目标区域的信息；  Al ll, the mobile node user sends a mobile request to the current LER/FA of the mobile node user before moving in the same LER/RPA-administered area, where the mobile request carries information of the target area to which the mobile node user needs to move;
A112、 所述当前 LER/FA收到所述移动请求后， 获得移动节点用户需要 移动到的目标区域的信息， 向该目标区域的一个或不止一个目标 LER/FA发 送移动协商请求。  A112. After receiving the mobile request, the current LER/FA obtains information about a target area to which the mobile node user needs to move, and sends a mobile negotiation request to one or more target LER/FAs of the target area.
所述的步骤 A12包括：所述目标 LER/FA接收到所述建立 LSP响应后， 向 所述当前 LER/FA发送移动协商响应，所述当前 LER/FA向所述移动节点用户 发送移动响应， LER/RJFA还向移动节点和所述一个或不止一个 LSP同时发送 数据。  The step A12 includes: after receiving the setup LSP response, the target LER/FA sends a mobile negotiation response to the current LER/FA, and the current LER/FA sends a mobile response to the mobile node user, The LER/RJFA also sends data to the mobile node and the one or more LSPs simultaneously.
所述的步骤 B具体包括： 所述移动节点用户移动到目标区域后， 通过所 述目标 LER/FA获得所述下一个 CoA，将该下一个 CoA向核心网络 CN进行注 册， 通过所述建立的 LSP与所述 LER/RFA进行数据交互。  The step B includes: after the mobile node user moves to the target area, obtains the next CoA by using the target LER/FA, and registers the next CoA with the core network CN, by using the established The LSP interacts with the LER/RFA.
所述的歩骤 A具体包括： A2、 基于 MPLS网络的移动节点用户在同一个 标签边缘路由器 /网关外地代理 LER/GFA管辖的区域中移动前， 该移动节点 用户的目标 LER/FA建立与所述 LER/GFA的 LSP。  The step A specifically includes: A2. The mobile node user based on the MPLS network establishes the target LER/FA of the mobile node user before moving in the area under the same label edge router/gateway foreign agent LER/GFA jurisdiction. LSP of LER/GFA.
所述的步骤 A2具体包括：  The step A2 described specifically includes:
A21、 所述移动节点用户的一个或不止一个目标 LER/FA接收所述移动 节点用户的当前 LER/FA发送的移动协商请求，并和所述当前 LER/FA协商确 定移动节点用户的下一个转交地址 CoA， 目标 LER/FA向所述 LER/GFA发送 建立 LSP请求； A21. One or more target LER/FAs of the mobile node user receive the mobile a mobile negotiation request sent by the current LER/FA of the node user, and negotiating with the current LER/FA to determine a next care-of address CoA of the mobile node user, and the target LER/FA sends an establishment LSP request to the LER/GFA;
A22、所述 LER/GFA根据建立 LSP请求与所述目标 LER/FA建立 LSP， 所 述 LER/GFA向所述目标 LER/FA发送建立 LSP响应。  A22. The LER/GFA establishes an LSP with the target LER/FA according to the establishment LSP request, and the LER/GFA sends an establishment LSP response to the target LER/FA.
所述的步骤 A21具体包括：  The step A21 includes:
A21 K 所述移动节点用户在同一个 LER/GFA管辖的区域中移动前， 向 移动节点用户的当前 LER/FA发送移动请求， 该移动请求中携带移动节点用 户需要移动到的目标区域的信息；  A21 K, the mobile node user sends a mobile request to the current LER/FA of the mobile node user before moving in the same LER/GFA jurisdiction, and the mobile request carries information of the target area to which the mobile node user needs to move;
A212、 所述当前 LER/FA收到所述移动请求后， 获得移动节点用户需要 移动到的目标区域的信息， 向该目标区域的一个或多个目标 LER/FA发送移 动协商请求。  A212. After receiving the mobile request, the current LER/FA obtains information about a target area to which the mobile node user needs to move, and sends a mobile negotiation request to one or more target LER/FAs of the target area.
所述的步骤 A22包括：  The step A22 includes:
所述目标 LER/FA接收到所述建立 LSP响应后， 向所述当前 LER/FA发送 移动协商响应， 所述当前 LER/FA向所述移动节点用户发送移动响应， LER/GFA还向移动节点和所述一个或不止一个 LSP同时发送数据。  After receiving the setup LSP response, the target LER/FA sends a mobile negotiation response to the current LER/FA, where the current LER/FA sends a mobile response to the mobile node user, and the LER/GFA also sends the mobile node to the mobile node. Transmitting data simultaneously with the one or more LSPs.
所述的步骤 B具体包括：  The step B described specifically includes:
所述移动节点用户在移动到目标区域后， 通过所述目标 LER/FA获得所 述下一个 CoA，将该下一个 CoA向 CN进行注册，通过所述建立的 LSP与所述 LER/GFA进行数据交互。  After the mobile node user moves to the target area, obtains the next CoA by using the target LER/FA, registers the next CoA with the CN, and performs data with the LER/GFA through the established LSP. Interaction.
所述方法还包括： 基于 MPLS网络的移动节点用户在同一个 LER/FA管 辖的区域中移动时， 该移动节点用户不建立 LSP路径， 仍然使用其现有的 CoA和所述 LER/FA进行数据交互。  The method further includes: when the mobile node user of the MPLS network moves in the same LER/FA jurisdiction, the mobile node user does not establish an LSP path, and still uses its existing CoA and the LER/FA for data interaction. .
本发明还提供一种移动节点用户设备，所述移动节点用户设备中设置有 提前触发模块；  The present invention also provides a mobile node user equipment, where the mobile node user equipment is provided with an early trigger module;
提前触发模块： 用于移动节点用户在不同 LER/FA管辖的、 同一个上一 级 LER管辖的区域中移动前， 触发移动节点用户向其当前 LER/FA发送移动 请求， 该移动请求中携带有移动节点用户需要移动到的目标区域的信息， 使当前 LER/FA向该目标区域的一个或不止一个目标 LER7FA发送移动协商 请求， 以促使目标 LER/FA与上一级 LER建立 LSP路径。 Trigger module in advance: Used for mobile node users in different LER/FA jurisdictions, the same one Before moving in the area governed by the LER, the mobile node user is triggered to send a mobile request to its current LER/FA, where the mobile request carries information of the target area to which the mobile node user needs to move, so that the current LER/FA is directed to the target area. One or more target LER7FAs send a mobile negotiation request to cause the target LER/FA to establish an LSP path with the upper LER.
所述上一级 LER为 LER/RFA或 LER/GFA。  The upper level LER is LER/RFA or LER/GFA.
由上述本发明提供的技术方案可以看出， 本发明针对 Y.mpls-mob中描 述的三种网络移动模型， 提出了基于 MPLS网络的移动节点用户实现快速 切换的方案。 通过移动节点用户在移动前， 其目标 LER/FA 先建立与 LER/RFA或 GFA (区域外地代理 /网关外地代理）的 LSP。从而减小或者消 除移动节点用户建立新的通信路径的延迟， 实现了快速切换。 更有效地利 用了系统资源， 可以推动运营商开展基于 MPLS网络的 NGN的各种业务。 附图简要说明  It can be seen from the above technical solution provided by the present invention that the present invention is directed to the three network mobility models described in Y.mpls-mob, and proposes a scheme for implementing fast handover by mobile node users based on the MPLS network. Before the mobile node user moves, its target LER/FA first establishes an LSP with LER/RFA or GFA (Regional Foreign Agent/Gateway Foreign Agent). Thereby, the delay of the mobile node user to establish a new communication path is reduced or eliminated, and fast switching is achieved. More efficient use of system resources can promote operators to carry out various services of NGN based on MPLS network. BRIEF DESCRIPTION OF THE DRAWINGS
图 1为 Y.mplS-mob标准草案中提出了三种不同的网络层次的移动模型 示意图； Figure 1 is a schematic diagram of three different network-level mobility models proposed in the Y.mpl S- mob draft standard;
图 2为针对 inter-access网络移动模型， 本发明所述方法的实施例的处理 流程图；  2 is a process flow diagram of an embodiment of the method of the present invention for an inter-access network mobility model;
图 3为针对 inter-network网络移动模型， 本发明所述方法的实施例的处 理流程图。 实施本发明的方式  3 is a process flow diagram of an embodiment of the method of the present invention for an inter-network network mobility model. Mode for carrying out the invention
本发明提供了一种 MPLS网络移动节点实现快速切换的方法，本发明的 核心为： 基于 MPLS网络的移动节点用户在移动前， 移动节点用户的目标 LER/FA已经建立了与 LER/RFA或 GFA的 LSP 0 The present invention provides a method for implementing fast handover of an MPLS network mobile node. The core of the present invention is: Before the mobile node user of the MPLS network moves, the target LER/FA of the mobile node user has established with the LER/RFA or GFA. LSP 0
本发明针对上述 Y.mpls-mob中描述的三种网络移动模型， 分别提出了 三种 MPLS网络移动节点用户进行快速切换的方法和流程。 下面结合附图来详细描述本发明所述方法，针对上述 inter-access网络移 动模型， 本发明所述方法的实施例的处理流程如图 2所示， 包括如下步骤： 步骤 21、基于 MPLS网络的移动节点用户开始在同一 LER7RFA管辖的区 域中移动前， 向移动节点用户的当前区域的当前 LER/FA发送移动请求。 该 移动请求中携带移动节点用户需要移动到的目标区域的信息。 The present invention is directed to the three network mobility models described in the above Y.mpls-mob, and proposes three methods and processes for fast handover of mobile node users in an MPLS network. The method of the present invention is described in detail below with reference to the accompanying drawings. For the above-mentioned inter-access network movement model, the processing flow of the embodiment of the method of the present invention is as shown in FIG. 2, and includes the following steps: Step 21: Based on the MPLS network The mobile node user begins to send a move request to the current LER/FA of the current area of the mobile node user before moving in the same LER7RFA governed area. The mobile request carries information of a target area to which the mobile node user needs to move.
步骤 22、 移动节点用户的当前区域的当前 LER/FA收到上述移动请求 后， 获得移动节点用户需要移动到的目标区域的信息， 向移动节点用户的 目标区域的一个或多个目标 LER7FA发送移动协商请求。 所述一个或多个目 标 LER/FA与所述当前 LER/FA进行协商后， 确定移动节点用户的新 CoA。  Step 22: After receiving the mobile request, the current LER/FA of the current area of the mobile node user obtains information about the target area to which the mobile node user needs to move, and sends the mobile to one or more target LER7FAs of the target area of the mobile node user. Negotiate the request. After the one or more target LER/FAs negotiate with the current LER/FA, the new CoA of the mobile node user is determined.
步骤 23、所述一个或多个目标 LER/FA向移动节点用户的 LER/RP A发送 建立 LSP请求， 请求建立和 LER/RFA之间的 LSP。  Step 23: The one or more target LER/FA sends an LSP request to the LER/RP A of the mobile node user to request to establish an LSP between the LER and the RFA.
步骤 24、所述一个或多个目标 LER/FA与移动节点用户的 LER/RPA之间 的 LSP建立完成后， LER/RPA向所述一个或多个目标 LER/FA发送建立 LSP 响应。 LER/RFA还向移动节点和所述一个或多个 LSP同时发送数据。  Step 24: After the establishment of the LSP between the one or more target LER/FAs and the LER/RPA of the mobile node user is completed, the LER/RPA sends an establishment LSP response to the one or more target LER/FAs. The LER/RFA also transmits data to the mobile node and the one or more LSPs simultaneously.
步骤 25、 所述一个或多个目标 LER/FA向所述当前 LER/FA发送移动协 商响应。  Step 25: The one or more target LER/FAs send a mobile negotiation response to the current LER/FA.
步骤 26、 所述当前 LER/FA向移动节点用户发送移动响应， 通知移动节 点用户可以移动到目标区域。  Step 26: The current LER/FA sends a mobile response to the mobile node user, and notifies the mobile node user that the mobile node can move to the target area.
移动节点用户移动到目标区域后， 由于所述一个或多个目标 LER/FA已 经建立了与 LER/RFA的 LSP路径， 所以移动节点用户的业务不会中断。  After the mobile node user moves to the target area, the mobile node user's service is not interrupted because the one or more target LER/FAs have established an LSP path with the LER/RFA.
移动节点用户移动到目标区域后， LER/RJFA负责将移动节点用户的数 据报文通过新建的 LSP向所述目标区域的一个或多个目标 LER/FA进行转 发。 移动节点用户通过所述目标区域的一个或多个目标 LER/FA获得新的 CoA地址， 将该新的 CoA地址向 CN进行注册。  After the mobile node user moves to the target area, the LER/RJFA is responsible for forwarding the data message of the mobile node user to the one or more target LER/FAs of the target area through the newly created LSP. The mobile node user obtains a new CoA address through one or more target LER/FAs of the target area, and registers the new CoA address with the CN.
针对上述 inter- network网络移动模型， 本发明所述方法的实施例的处理 流程如图 3所示， 包括如下步骤： 步骤 31、基于 MPLS网络的移动节点用户开始在同一 LER/GFA管辖的不 同 LER/RFA管辖的区域中移动前， 向移动节点用户的当前区域的当前 LER/FA发送移动请求。 该移动请求中携带移动节点用户需要移动到的目标 区域的信息。 For the above-mentioned inter-network network movement model, the processing flow of the embodiment of the method of the present invention is as shown in FIG. 3, and includes the following steps: Step 31: The mobile node user based on the MPLS network starts to send a move request to the current LER/FA of the current area of the mobile node user before moving in the different LER/RFA jurisdiction of the same LER/GFA jurisdiction. The mobile request carries information of a target area to which the mobile node user needs to move.
步骤 32、 移动节点用户的当前区域的当前 LER/FA收到上述移动请求 后， 获得移动节点用户需要移动到的目标区域的信息， 向移动节点用户的 目标区域的一个或多个目标 LER/FA发送移动协商请求。 所述一个或多个目 标 LER/FA与所述当前 LER/FA进行协商后， 确定移动节点用户的新 CoA。  Step 32: After receiving the mobile request, the current LER/FA of the current area of the mobile node user obtains information of the target area to which the mobile node user needs to move, and one or more target LER/FAs of the target area of the mobile node user. Send a mobile negotiation request. After the one or more target LER/FAs negotiate with the current LER/FA, the new CoA of the mobile node user is determined.
步骤 33、所述一个或多个目标 LER/FA向移动节点用户的 LER/GFA发送 建立 LSP请求， 请求建立和 LER/GFA之间的 LSP。  Step 33: The one or more target LER/FA sends an LSP request to the LER/GFA of the mobile node user to request to establish an LSP between the LER and the GFA.
步骤 34、所述一个或多个目标 LER FA与移动节点用户的 LER/GFA之间 的 LSP建立完成后， LER/GFA向所述一个或多个目标 LER/FA发送建立 LSP 响应。 LER/GFA还向移动节点和所述一个或多个 LSP同时发送数据。  Step 34: After the establishment of the LSP between the one or more target LER FAs and the LER/GFA of the mobile node user is completed, the LER/GFA sends an establishment LSP response to the one or more target LER/FAs. The LER/GFA also transmits data to the mobile node and the one or more LSPs simultaneously.
步骤 35、 所述一个或多个目标 LER/FA向所述当前 LER/FA发送移动协 商响应。  Step 35: The one or more target LER/FAs send a mobile negotiation response to the current LER/FA.
步骤 36、 所述当前 LER/FA向移动节点用户发送移动响应， 通知移动节 点用户可以移动到目标区域。  Step 36: The current LER/FA sends a mobile response to the mobile node user, and notifies the mobile node user that the mobile node can move to the target area.
移动节点用户移动到目标区域后， 由于所述一个或多个目标 LER/FA已 经建立了与 LER/GFA的 LSP路径， 所以移动节点用户的业务不会中断。  After the mobile node user moves to the target area, the mobile node user's service is not interrupted because the one or more target LER/FAs have established an LSP path with the LER/GFA.
移动节点用户移动到目标区域后， LER/GFA负责将移动节点用户的数 据报文通过新建的 LSP向所述目标区域的一个或多个目标 LER/FA进行转 发。 移动节点用户通过所述目标区域的一个或多个目标 LER/FA获得新的 CoA地址， 将该新的 CoA地址向 CN进行注册。  After the mobile node user moves to the target area, the LER/GFA is responsible for forwarding the data message of the mobile node user to the one or more target LER/FAs of the target area through the newly created LSP. The mobile node user obtains a new CoA address through one or more target LER/FAs of the target area, and registers the new CoA address with the CN.
针对上述 intra-access网络移动模型，本发明所述方法的实施例的描述如 下： 由于移动节点用户的移动范围局限在同一 LER/FA管辖的区域范围内， 所以， 移动节点用户在移动前， 不必建立新的 LSP路径。移动节点用户移动 到目标区域后， 仍然使用其原来的 CoA和所述 LER/FA进行数据交互。 For the above intra-access network mobility model, the description of the embodiment of the method of the present invention is as follows: Since the mobile node user's mobile range is limited to the same LER/FA jurisdictional area, the mobile node user does not have to move before moving. Establish a new LSP path. Mobile node user movement After reaching the target area, the original CoA and the LER/FA are still used for data interaction.
本发明还提供一种移动节点用户设备，该移动节点用户设备中设置有提 前触发模块。  The invention also provides a mobile node user equipment, wherein the mobile node user equipment is provided with an advance trigger module.
提前触发模块主要用于移动节点用户在不同 LER/FA管辖的、 同一个上 一级 LER管辖的区域中移动前， 触发移动节点用户向其当前 LER/FA发送移 动请求， 该移动请求中携带有移动节点用户需要移动到的目标区域的信息， 使当前 LER/FA向该目标区域的一个或不止一个目标 LER/FA发送移动协商 请求， 这样， 目标 LER/FA在接收到移动协商请求后， 通过向上一级 LER发 送建立 LSP请求，与上一级 LER建立 LSP路径。这里的上 级 LER为 LER/RFA 或 LER/GFA。 本发明中移动节点用户的当前 LER/FA、 目标 LER/FA以及 LER/RJFA、 LER/GFA的处理过程如上述方法中的描述，在此不再详细说明。  The early triggering module is mainly used for the mobile node user to send a mobile request to the current LER/FA before the mobile node user moves in the same LER/FA jurisdiction and the same upper LER jurisdiction, and the mobile request carries the mobile The information of the target area to which the node user needs to move, so that the current LER/FA sends a mobile negotiation request to one or more target LER/FAs of the target area, so that the target LER/FA passes the upward after receiving the mobile negotiation request. The primary LER sends an LSP request to establish an LSP path with the upper LER. The superior LER here is LER/RFA or LER/GFA. The processing procedure of the current LER/FA, the target LER/FA, and the LER/RJFA, LER/GFA of the mobile node user in the present invention is as described in the above method, and will not be described in detail herein.
以上所述， 仅为本发明较佳的具体实施方式， 但本发明的保护范围并 不局限于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易想到的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本 发明的保护范围应该以权利要求的保护范围为准。  The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

权利要求 Rights request
1、 一种多协议标签交换网络移动节点实现快速切换的方法， 其特征在 于， 包括步骤：  A method for implementing a fast handover by a mobile node of a multi-protocol label switching network, characterized in that:
A、 基于多协议标签交换 MPLS网络的移动节点用户在不同标签边缘路 由器 /外地代理 LER/FA管辖的同一个上一级 LER管辖的区域中移动前，该移 动节点用户的目标 LER/FA建立与所述上一级 LER的标记交换路径 LSP;  A. The mobile node user based on the multi-protocol label switching MPLS network establishes the target LER/FA of the mobile node user before moving in the same upper-level LER jurisdiction area governed by different label edge routers/foreign agents LER/FA Describe the label switched path LSP of the primary LER;
B、 所述移动节点用户移动到目标区域后， 通过所述建立的 LSP进行数 据传输。  B. After the mobile node user moves to the target area, data transmission is performed by using the established LSP.
2、 根据权利要求 1所述的方法， 其特征在于， 所述的步骤 A具体包括： Al、 基于 MPLS网络的移动节点用户在同一个标签边缘路由器 /区域外 地代理 LER/RFA管辖的区域中移动前， 该移动节点用户的目标 LER/FA建立 与所述 LER/RFA的标记交换路径 LSP。  2. The method according to claim 1, wherein the step A specifically comprises: Al, the MPLS network-based mobile node user moves in the area under the same label edge router/region foreign agent LER/RFA jurisdiction The target LER/FA of the mobile node user establishes a label switched path LSP with the LER/RFA.
3、 根据权利要求 2所述的方法， 其特征在于， 所述的步骤 A1具体包括: Al 1、 所述移动节点用户的一个或不止一个目标 LER/FA接收所述移动 节点用户的当前 LER/FA发送的移动协商请求，并和所述当前 LER/FA协商确 定移动节点用户的下一个转交地址 CoA， 目标 LER/FA向所述 LER/RFA发送 建立 LSP请求；  The method according to claim 2, wherein the step A1 specifically comprises: Al1, one or more target LER/FAs of the mobile node user receiving the current LER/ of the mobile node user a mobile negotiation request sent by the FA, and negotiated with the current LER/FA to determine a next care-of address CoA of the mobile node user, and the target LER/FA sends an establishment LSP request to the LER/RFA;
A12、 所述 LER/RPA根据建立 LSP请求与目标 LER/FA建立 LSP， 所述 LER/RFA向所述目标 LER/FA发送建立 LSP响应。  A12. The LER/RPA establishes an LSP with the target LER/FA according to the establishment LSP request, and the LER/RFA sends an establishment LSP response to the target LER/FA.
4、根据权利要求 3所述的方法，其特征在于，所述的步骤 All具体包括: A11 K 所述移动节点用户在同一个 LER/RFA管辖的区域中移动前， 向 移动节点用户的当前 LER/FA发送移动请求， 该移动请求中携带移动节点用 户需要移动到的目标区域的信息；  The method according to claim 3, wherein the step All comprises: A11 K the current LER/ of the mobile node user before the mobile node user moves in the same LER/RFA jurisdiction area The FA sends a mobile request, where the mobile request carries information of a target area to which the mobile node user needs to move;
A112、 所述当前 LER/FA收到所述移动请求后， 获得移动节点用户需要 移动到的目标区域的信息， 向该目标区域的一个或不止一个目标 LER/FA发 送移动协商请求。 A112. After receiving the mobile request, the current LER/FA obtains information about a target area to which the mobile node user needs to move, and sends a mobile negotiation request to one or more target LER/FAs of the target area.
5、 根据权利要求 3所述的方法， 其特征在于， 所述的步骤 A12包括： 所述目标 LER/FA接收到所述建立 LSP响应后， 向所述当前 LER7FA发送 移动协商响应， 所述当前 LER/FA向所述移动节点用户发送移动响应， LER/RFA还向移动节点和所述一个或不止一个 LSP同时发送数据。 The method according to claim 3, wherein the step A12 comprises: after receiving the setup LSP response, the target LER/FA sends a mobile negotiation response to the current LER7FA, where the current The LER/FA sends a mobile response to the mobile node user, and the LER/RFA also transmits data to the mobile node and the one or more LSPs simultaneously.
6、 根据权利要求 2、 3、 4或 5所述的方法， 其特征在于， 所述的步骤 B 具体包括：  The method according to claim 2, 3, 4 or 5, wherein the step B specifically comprises:
所述移动节点用户移动到目标区域后， 通过所述目标 LER/FA获得所述 下一个 CoA，将该下一个 CoA向核心网络 CN进行注册，通过所述建立的 LSP 与所述 LER/RFA进行数据交互。  After the mobile node user moves to the target area, obtain the next CoA by using the target LER/FA, register the next CoA with the core network CN, and perform the LSP and the LER/RFA through the established LSP. Data interaction.
7、 根据权利要求 1所述的方法， 其特征在于， 所述的步骤 A具体包括： A2、 基于 MPLS网络的移动节点用户在同一个标签边缘路由器 /网关外 地代理 LER/GFA管辖的区域中移动前，该移动节点用户的目标 LER/FA建立 与所述 LER/GFA的 。  The method according to claim 1, wherein the step A specifically includes: A2, the MPLS network-based mobile node user moves in the area under the same label edge router/gateway foreign agent LER/GFA jurisdiction The target LER/FA of the mobile node user is established with the LER/GFA.
8、 根据权利要求 7所述的方法， 其特征在于， 所述的步骤 A2具体包括: A21、 所述移动节点用户的一个或不止一个目标 LER/FA接收所述移动 节点用户的当前 LER/FA发送的移动协商请求，并和所述当前 LER/FA协商确 定移动节点用户的下一个转交地址 CoA， 目标 LER/FA向所述 LER/GFA发送 建立 LSP请求；  The method according to claim 7, wherein the step A2 specifically includes: A21, one or more target LER/FAs of the mobile node user receiving the current LER/FA of the mobile node user Sending a mobile negotiation request, and negotiating with the current LER/FA to determine a next care-of address CoA of the mobile node user, and the target LER/FA sends an establishment LSP request to the LER/GFA;
A22、所述 LER/GFA根据建立 LSP请求与所述目标 LER/FA建立 LSP， 所 述 LER/GFA向所述目标 LER/FA发送建立 LSP响应。 .  A22. The LER/GFA establishes an LSP with the target LER/FA according to the establishment LSP request, and the LER/GFA sends an establishment LSP response to the target LER/FA. .
9、根据权利要求 8所述的方法，其特征在于，所述的步骤 A21具体包括: The method of claim 8, wherein the step A21 specifically comprises:
' A211、 所述移动节点用户在同一个 LER/GFA管辖的区域中移动前， 向 移动节点用户的当前 LER/FA发送移动请求， 该移动请求中携带移动节点用 户需要移动到的目标区域的信息； A211, the mobile node user sends a mobile request to the current LER/FA of the mobile node user before moving in the same LER/GFA-administered area, where the mobile request carries information of the target area to which the mobile node user needs to move;
A212、 所述当前 LER/FA收到所述移动请求后， 获得移动节点用户需要 移动到的目标区域的信息， 向该目标区域的一个或多个目标 LER/FA发送移 动协商请求。 A212. After receiving the mobile request, the current LER/FA obtains information about a target area that the mobile node user needs to move, and sends the information to one or more target LER/FAs of the target area. Request for negotiation.
10、 根据权利要求 8所述的方法， 其特征在于， 所述的步骤 A22包括： 所述目标 LER/FA接收到所述建立 LSP响应后， 向所述当前 LER/FA发送 移动协商响应， 所述当前 LER/FA向所述移动节点用户发送移动响应， LER/GFA还向移动节点和所述一个或不止一个 LSP同时发送数据。  The method according to claim 8, wherein the step A22 includes: after receiving the setup LSP response, the target LER/FA sends a mobile negotiation response to the current LER/FA, where The current LER/FA sends a mobile response to the mobile node user, and the LER/GFA also simultaneously transmits data to the mobile node and the one or more LSPs.
11、 根据权利要求 7所述的方法， 其特征在于， 所述的步骤 B具体包括： 所述移动节点用户在移动到目标区域后， 通过所述目标 LER/FA获得所 述下一个 CoA，将该下一个 CoA向 CN进行注册，通过所述建立的 LSP与所述 LER/GFA进行数据交互。  The method according to claim 7, wherein the step B specifically includes: after the mobile node user moves to the target area, obtaining the next CoA by using the target LER/FA, The next CoA registers with the CN, and performs data interaction with the LER/GFA through the established LSP.
12、 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括： 基于 MPLS网络的移动节点用户在同一个 LER/FA管辖的区域中移动 12. The method according to claim 1, wherein the method further comprises: moving the mobile node user based on the MPLS network in an area under the same LER/FA jurisdiction
'时，该移动节点用户不建立 LSP路径，仍然使用其现有的 CoA和所述 LER/FA 进行数据交互。 · 'When the mobile node user does not establish an LSP path, it still uses its existing CoA and the LER/FA for data interaction. ·
13、一种移动节点用户设备，其特征在于， 所述移动节点用户设备中设 置有提前触发模块；  A mobile node user equipment, wherein the mobile node user equipment is provided with an early trigger module;
提前触发模块： 用于移动节点用户在不同 LER/FA管辖的、 同一个上一 级 LER管辖的区域中移动前， 触发移动节点用户向其当前 LER/FA发送移动 请求， 该移动请求中携带有移动节点用户需要移动到的目标区域的信息， 使当前 LER7FA向该目标区域的一个或不止一个目标 LER/FA发送移动协商 请求， 以促使目标 LER/FA与上一级 LER建立 LSP路径。  The early trigger module: for the mobile node user to trigger the mobile node user to send a mobile request to its current LER/FA before moving in the same LER/FA jurisdiction and the same upper LER jurisdiction, the mobile request carries the mobile The information that the node user needs to move to the target area, so that the current LER7FA sends a mobile negotiation request to one or more target LER/FAs of the target area, so as to cause the target LER/FA to establish an LSP path with the upper-level LER.
14、 根据权利要求 13所述的设备， 其特征在于， 所述上一级 LER为 LER/RF A或 LER/GF A。  14. The device according to claim 13, wherein the upper level LER is LER/RF A or LER/GF A.
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