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Failure recovery method, node, and path computing unit

A path calculation unit and path recovery technology, applied in the field of communication, can solve problems such as low efficiency of fault recovery

Active Publication Date: 2014-03-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Embodiments of the present invention provide a fault recovery method, node, and path computing unit, provide a fault recovery mechanism, and solve the problem of low fault recovery efficiency when performing path recovery on multiple paths after a link failure

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  • Failure recovery method, node, and path computing unit
  • Failure recovery method, node, and path computing unit
  • Failure recovery method, node, and path computing unit

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Embodiment Construction

[0127] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0128] The embodiment of the present invention provides a fault recovery method based on the node side, such as figure 1 As shown, the method includes:

[0129] 101. The node sends a first message to the path calculation unit, where the first message carries faulty link information and is used to indicate the failed link, so that the path calculation unit can determine all affected paths affected by the link failure, and obtain all Recover...

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Abstract

The present invention provides a failure recovery method, a node, and a path computing unit, relates to the field of communication, provides a failure recovery mechanism, and solves a problem of lower failure recovery efficiency when path recovery is carried at for multi-paths at the same time. The method includes that: the node sends out a first information to the path computing unit when a link failure is discovered; the path computing unit finds out which paths are influenced, obtains path recovering information of all paths being influenced, judging authorization states of the pathes being infuluenced, and sening out a path recovery information to a head node according to a judgement result; and the head node establishes a recovery path according the the path recovery information after that the path recovery information sent by the path computing unit is received by the head node. The embodiment of the failure recovery method is used for recovering a link failure.

Description

Technical field [0001] The present invention relates to the field of communications, in particular to a method, node and path calculation unit for failure recovery. Background technique [0002] In the communication network, in order to ensure the normal transmission of services under fault conditions, protection or recovery technologies are usually adopted. Among them, the recovery technology means that before a failure occurs, only one path is configured for the business; after the business fails, a new path is dynamically found for the business to ensure that the business is not interrupted. [0003] In the prior art, PCE (Path Computation Element, path calculation unit) is usually used to implement path restoration, and the specific process of using PCE for path restoration in the prior art is as follows: [0004] If a link in the network fails, the node that detects the failure will pass the failure information through the Notify in the RSVP-TE (Resource Reser Vation Protocol, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/703H04L45/28
CPCH04L12/6418
Inventor 张弦林毅
Owner HUAWEI TECH CO LTD
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