Energy Optimized Node Mobility Optimization Strategy for Wireless Sensor Networks

Mobile sensors need to move back and forth in the monitoring area. Its energy consumption is very large, and the energy is difficult to replenish. Therefore, it becomes a hotspot on saving energy and prolonging the life cycle of the network. In this paper, we divide the sensor network into several independent grids, and establish a grid based localization strategy for mobile sink nodes. When the sink node moves within a single grid, the location update process will be limited to this grid; when the sink node moves out of a front grid, the converging node only need to broadcast its new grid number in the network due to grid based network structure. Then, the optimal placement strategy of energy is constructed through linear optimization model. The simulation results show that these two aspects can greatly reduce the energy consumption during the location update process and improve the network performance.