Smallest Enclosing Circle Based Localization Approach for Wireless Sensor Networks

A novel range-free localization approach, smallest enclosing Circle based Localization (SECL), has been proposed. This approach uses the center of smallest enclosing circle of neighboring anchor nodes to estimate the position of target. Comparing to centroid, SECL considers the geometrical coverage of anchors rather than the mass center of them. Consequently, SECL is robust to imperfect topology, especially when the topology of anchors is depolyed unevenly. Simulation results show that SECL outperforms Centroid by an average of 10%, and even better when the topology is not uniform.