An Efficient Sensor Deployment Scheme for Large-Scale Wireless Sensor Networks

Sensor deployment to achieve better system performance is one of the critical issues in wireless sensor networks. An effective sensor deployment scheme is proposed for large-area sensor networks, where the event occurrence rate varies over the sensor-deployed region. By utilizing the local event occurrence rate and applying the analytical sensor detection capability expression for the problem formulation, the proposed scheme determines the optimal number of sensors for a typical surveillance sensor network that should be deployed in each local region that minimizes the total number of sensors while satisfying the target probability of the overall detection. The optimality of the proposed scheme is examined, and it is also shown that the sensor deployment by the proposed scheme considerably reduces the total number of sensors in comparison with a conventional sensor deployment.