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Routing and wavelength distributing method for optical wavelength division multiplexing network

A technology of wavelength division multiplexing and new method, applied in wavelength division multiplexing system, selection device of multiplexing system, electromagnetic wave transmission system, etc., can solve the problems of poor performance and high complexity

Inactive Publication Date: 2002-08-07
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] At present, although the proposed methods have their own characteristics, they have disadvantages such as high complexity and poor performance.

Method used

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  • Routing and wavelength distributing method for optical wavelength division multiplexing network

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Embodiment Construction

[0033] The present invention includes a digital computer, in which program instructions necessary for establishing a wavelength division multiplexing optical network system are stored, and in the wavelength division multiplexing optical network, a new call service is assigned a route and a minimum influence on network resources wavelength.

[0034] First, consider the impact on the adjacent path p when allocating wavelength λ to a backup route p* corresponding to the newly arrived traffic. Define the common link of channel p* and its adjacent channel p as the relevant link of channel p* and p, and only the influence of the relevant link needs to be considered. When the wavelength λ is allocated to p*, the number of all available channels on the relevant link is reduced by 1. When a certain relevant link is allocated with the wavelength λ, the link becomes the bottleneck link of the p channel, then the link will be Effect on the remaining channels available for path p. Use l / ...

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Abstract

The present invention discloses a wavelength division multiplexing (WDM) optical network route and wavelength distribution method, including digital computer, said digital computer executes the following steps: making network resource configuration; calculating route between any two notes in the optical network; forming standby route set; according to the requirements of calling service taking out all the stand by routes related to said service from stand by route set and calculating according to the formula, and selecting route and wavelength which have minium affection on network resource to distribute them to calling service. Said invention can reduce blocking rate of whole network, improve fairness and raise performance of whole network.

Description

technical field [0001] The invention relates to an optical network wavelength allocation method, in particular to a wavelength division multiplexing optical network routing and a new wavelength allocation method. Background of the invention [0002] DWDM technology has greatly promoted the development of optical network technology, and optical transport network has become the preferred solution for transport network. In an optical transport network, any pair of nodes is connected by one or more optical fibers, and each optical fiber can support multiple wavelengths. The nodes can cross-connect the input and output optical channels, and can dynamically reconfigure the optical network. When the client layer business arrives, the WDM optical network needs to allocate a route and select a wavelength for each business, and establish an optical transmission channel to transmit the business. Since the available resources (wavelength / fiber, etc.) of the optical network are limited...

Claims

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Application Information

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IPC IPC(8): H04J14/02H04Q3/52H04Q11/00
Inventor 顾畹仪程晓飞张杰王勇金文研
Owner BEIJING UNIV OF POSTS & TELECOMM
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