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International Journal of

Recent Trends in Engineering

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International Journal of Recent Trends in Engineering (IJRTE)

ISSN 1797-9617

Volume 1, Number 3, May 2009

Issue on Electrical & Electronics

Page(s): 201-205

Wavelength Assignment Problem in Optical WDM Networks

A. Sangeetha, K.Anusudha, Shobhit Mathur and Manoj Kumar Chaluvadi

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This paper analyses the wavelength assignment problem in optical WDM networks. First, the random wavelength assignment algorithm is compared with the first-fit wavelength assignment algorithm, later, the sparse wavelength conversion case is compared with no wavelength conversion and full wavelength conversion cases. These comparisons are done on the basis of blocking probability and number of links; numbers of channels are kept constant whereas the response is calculated by varying the load per link (in Erlangs). The blocking probability in case of random algorithm is always greater than first-fit wavelength assignment algorithm. The blocking probability is minimum in case of wavelength conversion, whereas in case of no conversion, the first-fit algorithm has better results as compared to that of random wavelength assignment algorithm.

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