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A method to reduce wavelength continuity limitation based on wson network

A continuity and wavelength technology, which is applied in the field of WSON (Wavelength Automatic Switching Optical Network) network wavelength control, can solve the problems of connection request blocking, routing blocking resources, lack of resources, etc., to reduce connection blocking rate, reduce wavelength continuity restrictions, Reduce the effect of wavelength conflict

Active Publication Date: 2016-07-06
FENGHUO COMM SCI & TECH CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a wavelength network (WSON network) without wavelength conversion function, due to the limitation of wavelength continuity, the required optical path may not be established due to route congestion or lack of resources, and the connection request will be blocked.

Method used

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  • A method to reduce wavelength continuity limitation based on wson network
  • A method to reduce wavelength continuity limitation based on wson network
  • A method to reduce wavelength continuity limitation based on wson network

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the drawings.

[0026] When calculating the wavelength route in the current WSON (WSON without wavelength conversion), it is assumed that the wavelength λ of the route calculation is specified as required 1 , This requires the routing module to look for the shortest path that has this common idle wavelength in all fiber sections passing through in the entire network topology and meets the constraints. For the specified wavelength (eg assumed λ 1 ), it is possible that the path calculation fails due to the inability to find all the paths with this wavelength as idle in all fiber sections. The present invention is mainly to automatically select another wavelength that satisfies the wavelength continuity and successfully calculates the path (for example, the wavelength λ 2 ).

[0027] The method for reducing wavelength continuity limitation based on WSON network of the present invention includes...

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Abstract

The present invention relates to the technical field of WSON network wavelength control, specifically a method for reducing wavelength continuity restrictions based on WSON network. In WSON network, after receiving a request to calculate the route with a specified wavelength, the routing module first adopts the traditional method Calculate the path, if the calculation is successful, the path calculation ends; otherwise, the wavelength selection path calculation is performed; the wavelength selection path calculation includes two parts: the common wavelength calculation path and the multi-layer graph calculation path. end; when the common wavelength path calculation fails, multi-layer graph path calculation is enabled. The method for reducing the wavelength continuity limitation based on the WSON network of the present invention reduces the wavelength continuity limitation in the non-wavelength conversion WSON network, reduces the wavelength conflict when establishing an optical channel, and reduces the connection blocking rate.

Description

Technical field [0001] The invention relates to the technical field of WSON (wavelength automatic switching optical network) network wavelength control technology, in particular to a method for reducing wavelength continuity restrictions based on a WSON network. The WSON especially refers to WSON without wavelength conversion. Background technique [0002] WSON is an automatic switching network (ASON) based on the wavelength division multiplexing (WDM) transport network. By introducing the control plane into the wavelength network, it adopts control plane technologies such as General Multi-Protocol Label Switching Protocol (GMPLS) and Path Computing Unit (PCE), Realize the dynamic scheduling of wavelength routing, realize the intelligentization of wavelength scheduling, and improve the flexibility of WDM network scheduling and the efficiency of network management. [0003] In order to establish a connection (optical channel of a certain wavelength) in the WSON network, a route (th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/721H04Q11/00H04J14/02
CPCH04J14/0257H04J14/0267H04L12/00
Inventor 张炳焱莫小杰朱冰黄晓艳
Owner FENGHUO COMM SCI & TECH CO LTD
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