Abstract:

To further enhance the location precision of unknown nodes in wireless sensor networks, a localization method based on particle swarm optimization is presented, through the combination of wireless sensor network and particle swarm optimization, which is dependent on distance. It can directly search outthe coordinates of unknown nodes by the distance from anchor nodes to unknown nodes. As is shown in the experimental results, compared to the normal locationalgorithms of fixed nodes,this method has higher positioning accuracy and can beapplied to the tracking of moving nodes.

Key words: wireless sensor networks(WSNs); particle swarm optimization(PSO); node location; anchor node