Argus : a light-weighted secure localization scheme for sensor networks

Rapid technological advances have enabled the development of wireless sensor networks for various monitoring tasks. Usually the involved applications are dependant on the location knowledge of the low-cost sensor nodes, the majority of which are non-beacon nodes whose positions are yet to be discovered. We present Argus, a light-weighted position estimation scheme for sensor networks, to address the problem of localizing non-beacon nodes, with the location references obtained from a few beacon nodes whose positions are known apriori. We first determine certain geometric reference points and evaluate them with a voting procedure. Then the position of a non-beacon node of concern is estimated with the geometric centroid of the identified most valuable reference points. Simulation results show that even when a few of the available beacon nodes are malfunctioning, our scheme can tolerate those misleading location references, and still provide a dependable localization service.