A sensor utilization scheme for the coverage guarantee criteria in a wireless sensor network

This paper considers a cluster-based wireless sensor network (WSN) where each sensor node takes turn to be cluster head. The main function of the cluster head is to oversee the communication within and between clusters while the remaining sensor nodes are involved in sensing of the surrounding environment. We address the sensor utilization problem where non-cluster head nodes in a cluster make decision to whether to be active and join the sensing process. The decision is based on the remaining energy of a sensor, and a performance criterion. Here, we use the probability that given point in the cluster is covered by at least N sensors. By using a probabilistic model, it can be analytically calculated. Since only the high energy and necessary sensors are used, the energy consumption can be greatly decreased. To evaluate the performance of our algorithm, the simulation results are shown that our proposed schemes are efficient in terms of lifetime and energy consumption. The experiment results show that our algorithm achieve a good performance in term of lifetime.