Wireless Sensor Network

1 Path Planning Algorithm for Mobile AnchorBased Localization in Wireless Sensor Networks Localization is an essential issue in wireless sensor networks because many applications require thesensor nodes to know their locations with a high degree of precision. Various localization methodsbased on mobile anchor nodes have been proposed for assisting the sensor nodes to determine their locations. However, none of these methods attempt to optimize the trajectory of the mobile anchornode. Accordingly, this paper presents a path planning scheme, which ensures that the trajectory of themobile anchor node minimizes the localization error and guarantees that all of the sensor nodes can determine their locations. The obstacle-resistant trajectory is also proposed to handle the obstacles inthe sensing field. The performance of the proposed scheme is evaluated through a series of simulations with the ns-2 network simulator. The results show that the proposed path planningalgorithm yields both a lower localization error and a higher percentage of localized sensor nodes than existing path planning schemes. WIRELESS SENSOR NETWORK 2013