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Variable depth search and iterated local search for the node placement problem in multihop WDM lightwave networks

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3 Author(s)
Kengo Katayama ; Department of Information and Computer Engineering, Okayama University of Science, 1 - 1 Ridai-cho, Japan ; Hiroshi Yamashita ; Hiroyuki Narihisa

We address a problem of finding an optimal node placement that minimizes the amount of traffics by reducing the weighted hop distances in multihop lightwave networks. The problem is called Node Placement Problem (NPP). NPP is known to be NP-hard and one of the most important problems in wavelength division multiplexing (WDM) based networks. In this paper we propose a new local search algorithm for the NPP based on variable depth search, and show its extension to an iterated local search algorithm. To evaluate the performance of the proposed methods, we provided the benchmark instances with known optimal solutions, and performed extensive experiments on the instances. The computational results showed that our iterated local search outperformed multistart local search methods and the best available metaheuristic for the problem.

Published in:

2007 IEEE Congress on Evolutionary Computation

Date of Conference:

25-28 Sept. 2007