S.J. Habib (Kuwait)
Sensor network, floorplan, placement, discrete space, optimization, evolutionary approach.
The coverage problem in wireless sensor network is to place sensor devices in a service area so that the entire service area is covered. We have modeled the coverage problem as two sub-problems: floorplan and placement. The floorplan problem is to partition the service area into well-defined geometric cells, where the placement problem is to assign the sensor devices into a set of cells. The cardinality of the set of cells is considered as all possible candidate locations to place the sensors; therefore, we transformed the search space from a continuous into discrete. Thus, we have reduced the complexity of the coverage problem, but we have merged the two sub-problems (floorplan and placement) into a single optimization problem to achieve good solutions. The objective function is to maximize the coverage of the service area while not exceeding a given budget. The merged optimization problem has been coded into the evolutionary approach and our initial results present interesting findings between the cell size and sensor radius of coverage.
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