Abstract:

Aimed at the node localization problem in wireless sensor networks, a localization scheme based on a single mobile beacon is proposed. In the scheme, the beacon promulgates its location information periodically and the node receives the information passively. Then, the node computes the distance between itself and the mobile beacon. Firstly, the rough location of node is obtained, and then as the mobile beacon moving in the detection area, more accurate location is achieved gradually by unscented Kalman filter (UKF) algorithm. The scheme does not rely on measured distances among neighbors so that the energy consummation is depressed. Simulation results show that the location precision is enhanced and the scheme is suitable for largescale WSNs which are deployed outdoors.