Ant Colony Optimization for Dynamic RWA in WDM Networks with Partial Wavelength Conversion

Ant Colony Optimization for Dynamic RWA in WDM Networks with Partial Wavelength Conversion Dynamic routing and wavelength assignment (RWA), which supports request arrivals and lightpath terminations at random times, is needed for rapidly changing traffic demands in wavelength division multiplexed, (WDM) networks. In this paper, a new distributed heuristic algorithm based on ant colony optimization for dynamic RWA is put forward. We consider the combination of route selection and wavelength assignment as a whole using a multilayer-graph model. Therefore, an extended multilayer-graph model for WDM networks with limited wavelength conversion is presented. Compared with other RWA methods, the Ant Colony heuristic algorithm can achieve better global network optimization and can reduce communication overhead cost of the networks. Simulation showed that a lower blocking probability and a more rational wavelength resource assignment can be achieved. Photonic Network Communications Springer Journals

Ant Colony Optimization for Dynamic RWA in WDM Networks with Partial Wavelength Conversion

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Kluwer Academic Publishers
Copyright © 2006 by Springer Science+Business Media, Inc.
Computer Science; Computer Communication Networks; Electrical Engineering; Characterization and Evaluation of Materials
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    Dorigo, M.

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