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Method for establishing path in wavelength division network, communication node and communication system

A network communication and intermediate node technology, applied in the field of communication nodes and communication systems, can solve problems such as failure to find, omit to establish effective paths between nodes, and business congestion, and achieve the effect of reducing the business congestion rate

Active Publication Date: 2011-08-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology cannot find this path, resulting in traffic congestion
The solutions in the prior art are likely to miss the establishment of an effective path between nodes, so that the risk of traffic congestion is greater

Method used

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  • Method for establishing path in wavelength division network, communication node and communication system
  • Method for establishing path in wavelength division network, communication node and communication system
  • Method for establishing path in wavelength division network, communication node and communication system

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Embodiment Construction

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0023] In view of the wavelength division network in the prior art, when the path establishment between the source node and the sink node fails, an effective path cannot be re-established according to the wavelength information of the link, resulting in traffic congestion. The present invention aims at the problem existing in the WDM network, by s...

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Abstract

The invention discloses a method for establishing a path in a wavelength division network, a communication node and a communication system. The method comprises that: a source node establishes a first path to a host node; the source node receives failure information from an intermediate node of the first path, wherein the failure information comprises the available wavelength information of an outgoing link of the intermediate node, and the outgoing link is not consistent in wavelength with an upstream link of the intermediate node on the first path; and the source node calculates a second path to the host node according to the available wavelength information of the outgoing link of the intermediate node. In the invention, in a service path establishment process, if discovering that the link does not have available wavelength resources, the intermediate node returns detailed available wavelength information causing path congestion to the source node. Therefore, the source node can calculates a new path by using the available wavelength information to reduce a service blocking rate.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for establishing a path in a wavelength division network, a communication node and a communication system. Background technique [0002] In a WDM network, the congestion of a service path is probably caused by the fact that the path does not have consistent wavelengths, that is, the links on the path do not have consistent wavelengths available. [0003] In the solution of the prior art, when the source node establishes a path, the routing calculation first determines the wavelength information used by the path, carries the available wavelength set of the path through the signaling, and transmits it hop by hop along the routing direction, and the available wavelength of the path is calculated after each hop. The set and the available wavelength set of the next hop link are intersected, and finally the sink node will receive the end-to-end path available wavelength ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02
CPCH04J14/0257H04J14/0284H04J14/0267H04J14/0268
Inventor 孙俊吴传军
Owner HUAWEI TECH CO LTD
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