Recoverable path selectino set-up method of automatic exchanging optical network

A technology for path recovery and automatic switching, which is applied in the field of optical communication networks, and can solve problems such as increase, path connection request blocking probability, etc.

Inactive Publication Date: 2003-01-22
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the path selection methods in the prior art use the standard shortest path algorithm to search for the physical route between the node pairs, and use the path selection algorithm with the minimum sum of basic

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0023] The inventive method comprises following main steps:

[0024] A. The source node cross-connect device OXC accepts the request for establishment of the recoverable path connection;

[0025] B. Choose a business path;

[0026] C. Transmission of business path reservation information;

[0027] D. Select the recovery path;

[0028] E. Update service path and corresponding recovery path information;

[0029] F. If a link failure occurs on the service path, execute recovery path establishment;

[0030] In step B, a link is selected using probability weight w s The path with the largest product of [i] is used as the service path. In step D, select a link cost weight w r [i] The path with the smallest sum is taken as the recovery path.

[0031] In the specific implementation, the following information can be maintained at the master node of the link: Reflect the bandwidth Fail required on link k to ensure the failure recovery of other links i other (k)[i], responding to ...

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Abstract

This invention discloses a method for setting up automatic exchange optical network resumable route selection containing the following steps: A, originating node crossed connection equipments accept a request of setting up resumable route connection; B, selecting a route with the maximum product of applied probability weighting as the service route; C, service route preserving information delivery; D, selecting a route with the smallest sum of link value weighting as the resumed route to balancing the flow and reducing blocking rate of requests; E, renewing service routes and related resumed routes information; and carrying out the resumed route set-up, if line link faults happen to the service routes according to the forward parallel line link set-up protocol to reduce the resumed route time delay.

Description

technical field [0001] The invention relates to an optical communication network, in particular to a distributed recoverable path selection establishment method of an automatic switching optical network. Background technique [0002] At present, with the rapid development of the optical fiber communication network, it has become the main carrier of information transmission. At the same time, due to its huge transmission capacity, the occurrence of faults on it will cause huge losses and impacts. Therefore, the faults surrounding the optical fiber communication network Restoration has a series of related draft standards in the industry. Most of the standard recommendations are based on the static protection fault recovery method configured by the network management. A recovery path is configured while the service path is established. The service is switched to the recovery path. The above method has disadvantages such as large resource occupation and difficulty in adapting ...

Claims

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Application Information

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IPC IPC(8): H04L12/721
Inventor 纪越峰赵继军雷蕾魏建勇
Owner BEIJING UNIV OF POSTS & TELECOMM
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