An Improved Localization Algorithm for Wireless Sensor Network Based on the Selection of Benchmark Anchor Node

To improve the localization precision of nodes in Wireless sensor network (WSN), this paper analyses the source of the localization error in the least square localization algorithm (LSL), and it can be concluded that the minimum cumulative relative distance error of the benchmark anchor node directly influence the localization precision. Based on the analyses, this paper proposes an improved least square algorithm, which is the minimum cumulative related distance error in LSL (LSL-MCR) algorithm. In the improved algorithm, we give a new principle to choose the benchmark anchor node. The simulation results indicate that the proposed algorithm can improve the localization precision of the unknown nodes.