Research on selection of benchmark anchor node in localization of wireless sensor networks

To meet the requirement of precise localization of nodes in Wireless Sensor Networks(WSN),this paper proposes an improved least square algorithm based on the selection of benchmark anchor node.The traditional LS localization algorithm does not reasonably take advantage of the selecting of benchmark anchor node to improve the localization precision,in consideration of these,a new method based on the minimum cumulative relative distance error for selecting benchmark anchor node is presented,and then the least square algorithm is adopted to calculate accurate location of the unknown node.The simulation results indicate that the proposed algorithm can greatly improve the localization precision without greatly increasing the algorithm complexity.