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Method for realizing self-curing protection in ECMP region

A protection recovery and backup technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as data packet loss

Inactive Publication Date: 2009-04-29
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

As mentioned above, ECMP is conducive to the protection and recovery of services. In the case of a failure, some data packets can continue to be transmitted along other paths, but in this case, the data packets on the path where the failure occurs will still be lost, which is extremely demanding on reliability. intolerable for high transport networks

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  • Method for realizing self-curing protection in ECMP region
  • Method for realizing self-curing protection in ECMP region
  • Method for realizing self-curing protection in ECMP region

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Embodiment Construction

[0016] specific implementation plan

[0017] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and detailed descriptions of known functions or configurations included herein or shown in the accompanying drawings are omitted to avoid unnecessarily obscuring the subject matter of the present invention. describe.

[0018] Generally, when the service arrives at the head-end node of the ECMP domain, an equal-cost path is selected based on the packet or flow for forwarding. In the MPLS network, the forwarding path in the ECMP domain is determined by the IP address and label. The establishment of the forwarding path is realized by RSVP-TE signaling, which is an existing technology and will not be repeated here. The process of establishing a working path and a backup path and a service redirection method will be described below in consideration of a single network failure.

[0019] figure 1 It shows a topol...

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Abstract

The present invention provides a method used for in-field self-curing in equal-cost multipath in a network. The method is used for coping with a single malfunction in equal-cost multipath field in telecommunication network. The method according to the invention calculates the backup resource which requires to be reserved in the operation path beforehand, confirming a Hash function and key code corresponding to each operation path, expanding signaling information, and repositioning the service on the fault path to other operation sub-paths through a mode of Hash function again when a fault occurs. The method according to the invention effectively uses the topological characteristic of equal-cost multipath of ECMP field, and combines the establishing of the operation path and the reserving of backup resource, reduces the processing operation of node and the using number of the label, and at the same time realizes the in-field self-curing of ECMP field.

Description

[0001] Field [0002] The invention relates to a protection recovery method when a network failure occurs, more specifically, a protection recovery method for a single failure in a telecommunication network ECMP domain. Background technique [0003] Equal Cost Multi-Path (ECMP) is a technique to improve the shortest path-based internal gateway routing system in the Internet. In the traditional shortest path algorithm, if two or more shortest paths exist, the algorithm will choose one of them. In ECMP, a small improvement is made, that is, when there are two or more shortest paths, traffic will be distributed among multiple equal-cost paths. The distribution of traffic in the equal-cost path usually uses a flow-based method, and calculates a hash (Hash) according to the source and destination addresses in the packet header to find a specific next hop leading to the destination. This avoids sending all datagrams to a fixed path, thereby achieving the load sharing function of d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/24H04L45/28
Inventor 尧昱张永军赵永利蒋定孚李彬顾畹仪
Owner BEIJING UNIV OF POSTS & TELECOMM
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