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

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 ...

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 weights, so when selecting a path, it will use the path selection algorithm with the smallest weight sum. The upper concentration leads to an increase in the blocking probability of the corresponding path connection request