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Proceedings Paper

Novel approach for assigning wavelengths in WDM all-optical networks (AONs)
Author(s): Debashis Saha; Amitava Mukherjee; Sahadeb Jana; Suman Chowdhury
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Paper Abstract

In this paper, we present an algorithm for effectively assigning wavelengths to ligthpaths in a multihop WDM optical network wherein the physical medium consists of optical fiber segments, which interconnect wavelength selective optical switches. This physical medium permits a limited number of wavelengths to be re-used among various fiber links, thereby offering vary high aggregate capacity. The proposed algorithm is a one where the problem of wavelength assignment in WDM optical network is posed as a graph-coloring problem. In this algorithm, an auxiliary graph is used, which is constructed from a given input physical topology and ligthpaths requests of a network. On this auxiliary graph a dynamic coloring approach assigns permanent colors to nodes. The number of colors needed represents the number of wavelengths required for the network. The algorithm is tested on a traffic model, and the coloring and timing efficiency are studied through extensive simulation and compared with the existing wavelength assignment heuristic algorithm. We find, that for a wide range of lightpath requests, the performance of our proposed algorithm is performing well as compared with the existing algorithm.

Paper Details

Date Published: 17 October 2001
PDF: 6 pages
Proc. SPIE 4585, Optical Networking, (17 October 2001); doi: 10.1117/12.445202
Show Author Affiliations
Debashis Saha, Jadavpur Univ. (India)
Amitava Mukherjee, Price Waterhouse Coopers Ltd. (India)
Sahadeb Jana, Haldia Institute of Technology (India)
Suman Chowdhury, Haldia Institute of Technology (India)

Published in SPIE Proceedings Vol. 4585:
Optical Networking
Chunming Qiao; Shizhong Xie, Editor(s)

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