A Comparative Study of Schemes for Robust Logical Topology Design in Wavelength Routed WDM Networks

S. Bandyopadhyay, A. Jaekel, Y.P. Aneja, and S. Saha (Canada)


Dedicated, Shared, Protection, Heuristics, logical topology


Schemes for fault tolerance in wavelength routed WDM networks include dedicated path protection, shared path protection and survivable logical topology for guaranteed restoration. In this paper we have studied these schemes, including a new scheme that we have proposed, to determine how much savings are possible, on an average, in each of these schemes. The study involves the development of three heuristics, one for each scheme for fault tolerance and, for each heuristic, large-scale studies involving many traffic requirements on a number of physical topologies. The objective of the study is to determine how much network resources are involved in each of the schemes. Our study shows that the new scheme for robust topology design that we have recently proposed requires significantly fewer resources.

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