Environment Aware Node Localization Method for Wireless Sensor Networks

Node localization is one of the essential techniques for wireless sensor networks,especially for location-dependent applications.As is known,the RSSI range-based localization algorithms have a considerable error in distance measure.To address this issue,we propose the Environment Aware Node Localization Method(EAM).In EAM,the whole covering area of the sensor network is divided into several sub regions,and then the method can figure out the parameters of the propagation model in the corresponding sub region with the cooperation of each beacon node.Based on the propagation model in each sub region,EAM can improve the precision of the distance measurement.Simulation results show that the average distance measurement error can be reduced about 15 % to 30% by adopting EAM.