A Distributed O(|E|) Algorithm for Optimal Link-Reversal
نویسنده
چکیده
We first characterize the minimal link-sets L whose directions must be reversed for reestablishing one or more directed paths from each node x to a fixed destination node d in a network when a link fails. Then, we give a distributed O(|E|) algorithm for determining such a link-set L, where |E| = (links in the network). This improves the previous lower bound O(n), where n = (nodes in the network). The minimality of the reversed link-set L has other important consequences.
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