Sensor Location Verification Scheme Based on Range-Free Localizations in WSNs

Localization is a pivotal technology in wireless sensor networks and location information of sensor nodes is essential to location-based applications. In the beacon-based localization, the reliability of beacons' location information is critical to the quality of network service. In this paper, we study the influences of drifting beacons the network localization. So according to this scenario mentioned above, we propose a distributed and lightweight beacons locations verification algorithm based on neighborhood-similarity (BLVNS), which utilizes similarity of the beacons' neighborhood in different time slot to recognize drifting beacons. The whole algorithms can be applied to the static and dynamic WSNs to improve the accuracy of range-free localization. Experiment results show that our algorithms can recognize unreliable beacons with detection rate higher than 90%.