Path selecting method of regulating link cost

A link cost and path selection technology, applied in transmission systems, electrical components, etc., can solve problems such as no explanation, and achieve the effect of meeting protection requirements

Inactive Publication Date: 2006-11-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent does not explain how to adjust the link cost to select the service path for the services that need to be protected in the optical network, and provide as perfect protection as possible for the services while utilizing the inherent protection resources of the transmission network.

Method used

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  • Path selecting method of regulating link cost
  • Path selecting method of regulating link cost
  • Path selecting method of regulating link cost

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Embodiment Construction

[0037] The specific implementation of the technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] In order to realize the purpose of the present invention, the present invention provides a kind of path selection method, and its basic starting point is: do not change the topological relationship, adjust the link cost according to the routing requirement, change the possibility of selecting each link by the shortest path algorithm, and give priority to Links that meet specific requirements. The inventive method comprises the following steps:

[0039] Step 1: After receiving the routing request, determine the source node and destination node;

[0040] Step 2: Adjust the link cost according to the protection attribute of the link, increase the chance of the link with inherent protection being preferentially selected, and use the shortest path algorithm to solve the path;

[0041] When adjusting...

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PUM

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Abstract

The invention is a path selecting method for regulating link cost, comprising the steps of: regulating link cost according to link protection attributes, increasing a chance that a link with inherent protection is preferred, and finding the path by shortest-path algorithm; checking the result: if the inherent protection mechanism of transmission network bottom layer has provided perfect protection, ending the algorithm; otherwise continuing executing the algorithm, regulating the link cost according to the link protection attributes and independence and reducing chances that the link with inherent protection and links the working path contains are selected, and finding a protection path of meeting a certain independence of the working path by the shortest-path algorithm; comparing the two results, selecting a more perfect path as result and returning. And it can effectively calculate a protection path and prefers the link wit protection mechanism.

Description

technical field [0001] The invention relates to a method for solving a service path in an optical network, in particular to a method for selecting a path for a service to be protected in an optical network. Background technique [0002] In optical network-based service transmission, in order to ensure the quality of service transmission, it is necessary to provide a protected transmission path for service transmission with high service level. The current common implementation methods usually use the inherent protection mechanisms at the bottom of the optical network, such as SDH multiplex section protection rings, subnet connection protection rings, channel protection rings, and linear multiplex section protection to protect services. However, in practical applications, there are various networking modes for optical networks. For example, the SDH ring networking mode based on multiplex section protection rings and channel protection rings and the mesh network (mesh) networki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L45/122
Inventor 杨静王加莹
Owner ZTE CORP
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