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Method for reducing wavelength-continuity constraint based on WSON (wavelength switched optical network)

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

Active Publication Date: 2013-12-11
FENGHUO COMM SCI & TECH CO LTD
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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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  • Method for reducing wavelength-continuity constraint based on WSON (wavelength switched optical network)
  • Method for reducing wavelength-continuity constraint based on WSON (wavelength switched optical network)
  • Method for reducing wavelength-continuity constraint based on WSON (wavelength switched optical network)

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Embodiment Construction

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

[0026] At present, when calculating wavelength routing in WSON (WSON without wavelength conversion), it is assumed that the wavelength λ for this calculation is required to be specified. 1 , which requires the routing module to search for a shortest path in the entire network topology that has this common idle wavelength among all passing fiber segments and satisfies the constraints. For a specified wavelength (e.g. assumed λ 1 ), the path calculation may fail because all fiber segments with idle paths of this wavelength cannot be found. The present invention is mainly to automatically select another wavelength (such as wavelength λ 2 ).

[0027] The method for reducing wavelength continuity restriction based on WSON network of the present invention comprises the following steps:

[0028] In the WSON network, after the routing module receives the request ...

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Abstract

The invention relates to the technical field of wavelength control of a WSON (wavelength switched optical network), and in particular relates to a method for reducing a wavelength-continuity constraint based on the WSON (wavelength switched optical network). In the WSON, a routing module first calculates a path by adopting a conventional mode after receiving a request for calculating a route according to an appointed wavelength, and if the calculation is successful, the path calculation is ended, and otherwise, wavelength selection path calculation is performed; the wavelength selection path calculation comprises public wavelength path calculation and multilayer graph path calculation; the public wavelength path calculation is started first, and if the calculation is successful, the path calculation is ended; and if the public wavelength path calculation fails, the multilayer graph path calculation is started. According to the method for reducing the wavelength-continuity constraint based on the WSON, the wavelength-continuity constraint in the wavelength-switching-free WSON is reduced, the wavelength conflict during the construction of an optical channel is alleviated, and the connection blocking rate is reduced.

Description

technical field [0001] The invention relates to the technical field of WSON (Wavelength Automatic Switching Optical Network) network wavelength control, in particular to a method for reducing wavelength continuity restrictions based on the WSON network. The WSON refers in particular to a WSON without wavelength conversion. Background technique [0002] WSON is an automatic switching network (ASON) based on 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 computation element (PCE), Realize the dynamic scheduling of wavelength routing, realize the intelligence 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 using a certain wavelength) in the WSON network, it is nece...

Claims

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Application Information

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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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