Method, system and node device for recovery path establishment

A technology for restoring paths and nodes, which is applied in the field of network communication and can solve problems such as increased demand for bandwidth resources and inability to restore services in a timely and effective manner.

Active Publication Date: 2013-01-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a recovery path establishment method, system and node equipment, which solve the probl

Method used

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  • Method, system and node device for recovery path establishment
  • Method, system and node device for recovery path establishment

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0132] Embodiment 1. This embodiment of the present invention provides a method for restoring path establishment. Such as figure 2 In the network shown, the network includes nodes A, B, C, D, E, and F, and the solid lines between the nodes represent optical fiber links. The working path of the service has a route of A-B-D-F, and corresponding bandwidth resources are allocated to the working path. The bandwidth resource on the A-C link and the bandwidth resource on the E-F link are occupied by other paths, possibly by the working path or protection path of other services, or by the protection path of the service A-F. Node A is the source node of the signaling message, and node F is the sink node of the signaling message. Routes of one or more restoration paths of known services of nodes A and F. Downstream refers to the direction from the source node to the sink node, and upstream refers to the direction from the sink node to the source node. Establishing a recovery path f...

Embodiment 2

[0216] Embodiment 2, the embodiment of the present invention provides a node device, such as image 3 As shown, the node equipment includes:

[0217] The first obtaining unit 310 is configured to obtain the working forward shared node set of the recovery path according to the routing information of the service recovery path and the routing information of the service working path; the working forward sharing node in the working forward sharing node set is The downstream adjacent nodes on the recovery path and the working path are the same;

[0218] The first judging unit 320 is configured to judge whether the present node is a working forward sharing node according to the working forward sharing node set, and obtain a first judgment result;

[0219] The first allocation unit 330 is configured to allocate the first label and the first interface according to the condition, the condition includes the first judgment result; the first label is the forwarding label from the current ...

Embodiment 3

[0228] Embodiment 3, the embodiment of the present invention provides a node device, such as image 3 As shown, the node equipment includes:

[0229] The first obtaining unit 310 is configured to obtain a set of working forward sharing nodes of the recovery path according to the routing information of the service recovery path and the routing information of the service working path; the working forward sharing nodes in the working forward sharing node set are The downstream adjacent nodes on the recovery path and the working path are the same; used to obtain the protection forward sharing node set of the recovery path according to the routing information of the recovery path and the routing information of the service protection path; the protection forward sharing node set of the protection path The forward sharing node has the same downstream adjacent node on the recovery path and the protection path;

[0230] The first judging unit 320 is used to judge whether the current n...

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Abstract

The present invention relates to network communication field, and specifically discloses a recovery path establishment method, comprising: a first node according to the routing information of the the business recovery path and the working path, obtaining a working forward shared node collection of the recovery path; the irst node according to the working forward shared node collection, determining if itself is a working forward shared node, and assigning a first tag and a first interface; the first node sending an establishment request message to a first downstream node, and the establishment request message including at least a first tag, a first interface, the routing information of the recovery path and working forward shared node information; the first node receiving an establiment response message pf the recovery path, the establiment response message including at least a fourth tag, afourth interface, and the routing information of the recovery path; and the first node according to the first tag, the first interface, the fourth tag, and the fourth interface, establishing the recovery path cross-connect. The embodiment of the invention also discloses a recovery path establishing system and a node device.

Description

technical field [0001] The present invention relates to network communication technology, in particular to a method, system and node equipment for restoring path establishment. Background technique [0002] Automatically Switched Optical Network (ASON) can dynamically establish paths, and has a strong ability to resist failures. After the working path of the service fails, the service can be recovered through the recovery path to ensure the reliability of services with different survivability requirements. [0003] The existing automatic switching optical network technology can realize the dynamic establishment of the recovery path. Usually, two methods are used to establish the recovery path: preset routes but do not reserve bandwidth resources. This method cannot guarantee the bandwidth resources of the recovery path. The recovery path may be different from other The business preempts resources, and the business cannot be restored in a timely and effective manner after th...

Claims

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Application Information

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IPC IPC(8): H04Q11/00H04L12/24H04L45/24H04L45/28H04L45/50
CPCH04L41/0668H04L12/24H04L45/00H04L45/22H04L45/28H04L45/50
Inventor 隋志成
Owner HUAWEI TECH CO LTD
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