A Traffic-Grooming Algorithm for Wavelength-Routed Optical Networks
Milind Dawande, Rakesh Gupta, Sanjeewa Naranpanawe, Chelliah Sriskandarajah
INFORMS Journal on Computing · 2007 · Volume 19 · Issue 4
Abstract
We consider the problem of grooming in all-optical networks to maximize traffic. We present an integer-programming formulation while constraining the number of optical transceivers at each node, the link load, and the capacity of each lightpath. Based on the structural properties of the problem, we develop a heuristic based on a column-generation technique. The algorithm is easy to implement, requires a modest amount of CPU time, and provides high-quality solutions. To ascertain the quality of solutions obtained by our algorithm, we present an alternative formulation that allows us to develop an upper bound using a Lagrangian-relaxation technique. An extensive computational study is presented.
Keywords
optical networks, traffic grooming, wavelength division multiplexing, column generation, Lagrangian relaxation
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