Wavelength decomposition approach for computing blocking probabilities in WDM optical networks without wavelength conversions

Authors:
Anwar Alyatama
Affiliations:
Department of Computer Engineering, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
Venue:
Computer Networks: The International Journal of Computer and Telecommunications Networking
Year:
2005

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Abstract

We present an approximate analytical method to evaluate the blocking probabilities in Wavelength Division Multiplexing (WDM) networks without wavelength converters. Our approach assumes fixed routing with Random or First-Fit wavelength assignment. The new approach views the WDM network as a set of different layers (colors) in which, blocked traffic in one layer is overflowed to another layer. Analyzing blocking probabilities in each layer of the network is derived from an exact approach. A moment matching method is then used to characterize the overflow traffic from one layer to another. The results indicate that our approach is more accurate than previous works.