Multicast Routing with Power Consideration in WDM Networks

Abstract

To support multicast communications in WDM networks has become an important and attractive topic recently. In this paper, we study constrained multicast routing with power consideration in WDM networks, where power is attenuated due to (i) the number of concatenated fan-outs (splitting), and (ii) the propagation distance from source node to any multicast member. It can be shown that the problem can be modeled as a Steiner tree problem, and we propose a heuristic algorithm called centralized-splitting algorithm to construct the multicast routing paths with small power loss. To evaluate the performance, we compare this algorithm with the Member-Only algorithm [15], which can provide the best bandwidth and wavelength usage in the multicast routing construction with sparse splitting constrain. Our simulation results show that the centralized-splitting algorithm can reduce the power loss by 7%, while it still maintains proper bandwidth, wavelength usage and delay requirement.