Novel approach for assigning wavelengths in WDM all-optical networks (AONs)

Debashis Saha; Amitava Mukherjee; Sahadeb Jana; Suman Chowdhury

doi:10.1117/12.445202

17 October 2001 Novel approach for assigning wavelengths in WDM all-optical networks (AONs)

Debashis Saha, Amitava Mukherjee, Sahadeb Jana, Suman Chowdhury

Proceedings Volume 4585, Optical Networking; (2001) https://doi.org/10.1117/12.445202
Event: Asia-Pacific Optical and Wireless Communications Conference and Exhibit, 2001, Beijing, China

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.

Citation Download Citation

Debashis Saha, Amitava Mukherjee, Sahadeb Jana, and Suman Chowdhury "Novel approach for assigning wavelengths in WDM all-optical networks (AONs)", Proc. SPIE 4585, Optical Networking, (17 October 2001); https://doi.org/10.1117/12.445202

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