On the Complexity of the Regenerator Placement Problem in Optical Networks

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Placement of regenerators in optical networks has attracted the attention of recent research works in optical networks. In this problem, the authors are given a network with an underlying topology of a graph and with a set of requests that correspond to paths in. There is a need to put a regenerator every certain distance, because of a decrease in the power of the signal. In this paper, they investigate the problem of minimizing the number of locations to place the regenerators.