MMRL: Mobile Max Rectangle Localization Scheme for Large Scale Wireless Sensor Network

The sensor node localization is a key technology to make application feasible and meaningful. This paper presents and analyzes a proposed localization algorithm by employing a mobile anchor node, called mobile maximum rectangle localization scheme. In the proposed scheme, a mobile anchor node moves around in sensor area and broadcasts beacon message. The sensor node uses the geometry technique to find the maximum rectangle which encloses itself and then obtain its location. Our approach is different from previous schemes in that it works without measuring any angle, distance, and received signal strength at radio transceiver. An irregular radio range is assumed in our discussion. High localization accuracy can be achieved without using expensive hardware on the sensor nodes, as required by other localization schemes. The proposed localization scheme is verified by OPNET simulation software, which shows our method has higher accuracy than Ssu´s localization scheme.