The Double-Coverage Algorithm for Mobile Node Deployment in Underwater Sensor Network

Abstract

The deployment of sensors is of importance in underwater wireless sensor networks (UWSNs) in the area of underwater short distance communication. Aiming at the problem of blind coverage and excessive energy consumption in the deployment of sensors in UWSNs, from the perspective of no vulnerability coverage monitoring area and on the basis of current coverage control method, mobile sensor nodes are introduced to double cover the target area around the UWSNs’ coverage control, and the double-coverage algorithm based on the deployment of mobile sensors is proposed. Firstly, the sensor node sensing model is established and the target area is divided into grid. Further, the deployment of mobile nodes is modeled and analyzed on the basis of the divided grid. Then the sensor node mobility model is designed and the double-coverage algorithm based on sensor node deployment is proposed. Finally, the rationality and effectiveness of the proposed algorithm is verified by simulation experiments. The simulation results show that the proposed algorithm can reduce the number of mobile nodes, which save the cost. At the same time, the energy consumption of sensor nodes is reduced as well under the same conditions and to a certain extent, the average energy consumption of mobile nodes in the network is evenly distributed. The algorithm effectively improves the coverage quality of UWSNs and greatly prolong the network lifetime.