To find the optimal movement path of Sink node and maximum network lifetime when sensor nodes were uniformly distributed,movement path optimization algorithm( MPOA) of Sink node for mobile sensor networks was proposed. In the MPOA algorithm,data collection range of Sink node was divided into multiple rings,and the monitoring area was divided into multiple grids. According to positions of Sink node and multi-hop communication,unit node energy consumption of each grid was expressed by mathematical formula,and...