Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/3181

Routing and wavelength assignment for WDM multicast networks

Authors He, JY
Chan, SHG
Tsang, DHK
Issue Date 2001
Source Proceedings IEEE Global Telecommunications Conference, 2001. GLOBECOM '01. Texas, U.S.A. , v. 3,25-29 Nov. 2001, p. 1536-1540
Summary The multicast routing and wavelength assignment (MC-RWA) problem is generally studied with the objective to maximize the number of multicast groups admitted, or equivalently, to minimize the call (or session) blocking probability given a certain number of wavelengths. While this approach is sound, a better objective is to maximize the total number of users served (i.e., minimizing the user blocking probability) by allowing part of a multicast group to be admitted. We present for the first time a formulation of the MC-RWA problem with such an objective. The formulation is a nonlinear integer program, which in general is complex to solve. We hence pro. pose a heuristic algorithm based on linear programming (LP). We further develop a simpler MAX-FIRST algorithm, which achieves almost the same performance as the LP algorithm. These algorithms are for static MC-RWA, where the multicast trees are predetermined and cannot be changed during the wavelength assignment. We extend the algorithms to dynamic MC-RWA, where new multicast trees can be built for unserved groups. We finally present upper and lower bounds on the user blocking probability for the static MC-RWA.
Subjects
ISSN 1930-529X
ISBN 0-7803-7206-9
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Language English
Format Conference paper
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