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Multicast Routing and Wavelength Assignment in WDM Networks: A Bin Packing Approach

This paper addresses the problem of multicast routing and wavelength assignment (MC_RWA) in wavelength routed WDM optical networks. Multicast requests are facilitated in WDM networks by setting up so-called light-trees and assigning wavelengths to them. Objectives of the MC_RWA problem include minimizing the number of distinct wavelengths used to establish a set of multicast requests and minimizing the cost of the corresponding light-trees. This cost can represent the physical length, delay or actual cost of a tree. Applications that require QoS multicasting can impose additional constraints on light-trees, such as a bounded end-to-end delay. Proposed are heuristic algorithms based on bin packing methods for the general MC_RWA problem, which is NP-complete. These algorithms can onsider unicast, multicast and broadcast requests with or without QoS demands. Computational tests indicate that these algorithms are very efficient, particularly for dense networks.

(060.4250) Fiber optics and optical communications : Networks (060.4510) Fiber optics and optical communications : Optical communications

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