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The use of a virtual architecture in wireless sensor networks provides a powerful and fast partitioning into a set of clusters, each being locatable in space by the sink or Base Station (BS for short). The authors first propose a protocol for the detection of empty clusters due to poor distribution of sensors or in low-density network. After this detection, they propose a strategy to allow mobile sensors (actuators) to move to position themselves on empty clusters in order to improve the routing of collected data. The Wireless Sensor Networks (WSN) are from the family of Mobile Ad-hoc NETworks (MANET), but have additional features and constraints: typically, they consist of a wide range of sensors with limited energy capacity.
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