A study on the routing and wavelength assignment in wavelength division multiplexing ring

A study on the routing and wavelength assignment in wavelength division multiplexing ring

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Article ID: iaor2004454
Country: South Korea
Volume: 27
Issue: 4
Start Page Number: 1
End Page Number: 10
Publication Date: Dec 2002
Journal: Journal of the Korean ORMS Society
Authors: , ,
Keywords: telecommunications
Abstract:

The ring routing and wavelength assignment problem arose in the planning of optical communication networks which use WDM rings. Traffic demands are given for each pair of nodes in a ring: each demand must be routed one of the two possible connections round the ring and the wavelength assignments must be made so that there are no conflicts: that is, no two connections whose routes share a link can be assigned the same wavelength along that link. The objective is to minimize the number of used wave lengths. We propose the local optimal routing for the problem and show that there always exists an optimal solution satisfying it. Furthermore we suggest a new lower bound for the problem and show that it is very efficient for the worst case example.

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