Accurate Nodes Localization in Anisotropic Wireless Sensor Networks

An accurate localization algorithm tailored for anisotropic wireless sensors networks (WSN)s is proposed in this paper. Using the proposed algorithm, each regular or position unaware node estimates its distances only to reliable anchors or position-aware nodes. The latter are properly chosen following a new reliable anchor selection strategy that ensures an accurate distance estimation making thereby our localization algorithm more precise. New average hop sizes´ expressions are also developed for both 2-D and 3-D scenarios. Simulations show that our algorithm, consistently outperforms the best representative localization algorithms currently available in the literature in terms of accuracy, even with the presence of non-uniform node distribution or radiation irregularities.