Connectivity and sparse wavelength conversion in wavelength-routing networks

Authors:
Suresh Subramaniam;Murat Azizoglu;Arun K. Somani
Affiliations:
Dept. of Electrical Engineering, University of Washington, Seattle, WA;Dept. of Electrical Engineering, University of Washington, Seattle, WA;Dept. of Electrical Engineering, University of Washington, Seattle, WA and Dept. of Computer Science and Engineering, University of Washington, Seattle, WA
Venue:
INFOCOM'96 Proceedings of the Fifteenth annual joint conference of the IEEE computer and communications societies conference on The conference on computer communications - Volume 1
Year:
1996

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Abstract

We study the effects of topological connectivity and wavelength conversion in circuit-switched all-optical/ wavelength-routing networks. An approximate blocking analysis of such networks is performed. We first propose an improved framework for the analysis of networks with arbitrary topology. We introduce a simple model for networks with a variable number of converters and analyze the effect of wavelength converter density on blocking probability. We then apply this framework to two sparse network topologies, the ring and the mesh-torus, and obtain the blocking performance. The results show that, in most cases, only a fraction of the network nodes need to be equipped with wavelength conversion capability for good performance. Finally, the tradeoff between physical connectivity, wavelength conversion, and the number of available wavelengths is studied through networks with random topologies.