A node schedule method for multi-coverage probability based on probabilistic coverage in WSNs

Coverage is one of the important issues in WSNs, which can measure the service quality of sensors deployed in the sensing region. Comparing with the traditional detection model, i.e. dist detection model, the probabilistic detection model is more realistic. Based on the probabilistic detection model, the coverage problems are researched focus on either point coverage or area coverage. But in the real applications, different coverage requests are usually needed in the whole sensing region, because of existing of different probability of targets' appearance. In this paper, a node schedule method based on probabilistic coverage for multi-coverage requirement is proposed. The sleeping sensors near by the hot areas become active preferentially by setting the backoff time. Simulation results shown that this method can schedule less sleeping sensors in active state when the hot point emergent.