The logical configuration of a WDM lightwave network can be changed by reassigning wavelengths to tunable transmitters and/or receivers of nodes. In this report, we focus on the reconfiguration of multihop networks that will be carried out in response to changing traffic pattern. The reconfiguration can improve network performance in terms of maximum throughput. After obtaining an optimal node placement by using a rearrangement algorithm, we must actually reconfigure the network according to some reconfiguration procedure that defines way to move nodes to optimal places. Assuming no propagation delay between every pair of nodes, we have developed three reconfiguration procedures. In this report, we consider the case that propagation delay between any pair of nodes takes some positive value. By means of simulations, we examine the impact of the propagation delay normalized by a packet transmission time upon the number of lost packets during reconfiguration and maximum total delay.
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