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Recently, wireless sensor networks (WSNs) has been widely recognized as a promising technology in latest development in green buildings communications. Localization is one of the fundamental issues in wireless sensor networks. The accuracy of estimated positions can be significantly helpful to use in an intelligent e-applications. In this paper, we propose a fast and efficient localization scheme based on RSSI model for wireless sensor networks. The node locations are computed by performing simple geometric calculations that rely on the broadcasting information from a mobile beacon equipped with GPS. Simulation results show the node positions can be determined accurately and our proposed scheme outperforms previous well known localization schemes.

Localization is one of the fundamental issues in wireless sensor networks. Many approaches including range-based and range-free categories have been proposed to determine sensor node locations. The range-based algorithms often achieve higher accuracy, but they are easier to be interfered and an additional hardware is required. In this paper, we present a fast and simple localization scheme for wireless sensor networks, which is computed by simple operations with the specific approximate RSSI value on an accelerative signal attenuation model. Simulation results show that our scheme is very efficient and that the node positions can be determined accurately.