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The use of mobile sensors is of great relevance to monitor hazardous applications where sensors cannot be deployed manually. Traditional algorithms primarily aim at maximizing network coverage rate, which leads to the creation of the "Energy hole" in the region near the sink node. In this paper, the authors are addressing the problem of redistributing mobile sensor nodes over an unattended target area. Driven by energy efficiency considerations, a pixel-based transmission scheme is developed to reduce extra overhead caused by frequent sensing and decision making. They derive the optimal node distribution and provide a theoretical explanation of balanced energy depletion for corona-based sensor network.
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