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Minimizing energy consumption and ensuring fault tolerance are two important issues in ad-hoc wireless networks. In this paper, the authors describe a distributed topology control algorithm which minimizes the amount of power needed to maintain bi-connectivity. The algorithm selects optimum power level at each node based on local information only. The resultant topology has two properties: it preserves the minimum energy path between any pair of nodes and it ensures fault tolerance by maintaining bi-connectivity. By presenting experimental results, they show the effectiveness of their proposed algorithm.
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