A localization algorithm for wireless sensor networks with asymmetric links

For conquering the problem of poor locating performance by using DV-Hop algorithm in the complex environment with asymmetric links. Several approaches were put forwarded in this paper. Firstly, a neighbor nodes mining method is used for ensure the accurate identification of adjacent nodes. Secondly, the minimum hop-count mechanism is used for calculate the real hop count between nodes. Thirdly, a new method of computing average hop-size is adopted to reduce its error. And then, a novel method of solving a system of equations is presented to estimation the initial location of unknown node. Finally, a coordinate calibration technology is used to further improve the positioning accuracy. Simulation results show that, the improved algorithm can effectively avoid the influence of asymmetric links, significantly improve the positioning accuracy and reduce the cost of network.