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Aggregation of individual wavelengths into wavebands for their subsequent switching and routing as a single group is an attractive way for scalable and cost-efficient routing in optical networks. Our objective is to minimize the switching cost by employing a waveband hierarchy subject to physical constraints. To that extent, we establish the equivalence between the waveband routing/assignment problem and the logical topology design problem. We provide a general model for logical topology design using an integer linear programming formulation. We propose a heuristic-based algorithm for the case of ring networks and use extensive simulation results to describe the performance of this algorithm towards our general goal of minimizing the switching cost.
Date of Conference: 2004