RSSI-based Rings Overlap Localization Algorithm in Wireless Sensor Network

ABSTRACT

This paper proposes a RSSI-based rings overlap localization algorithm of Environment Adaption(RROLA/EA) for large-scale wireless sensor network (WSN). Localization technology is one of the key technologies in most applications of wireless sensor network. Localization technology is composed of two phases: ranging phase and localization phase. RSSI-based ranging method is adopted in the ranging phase and rings overlap method is adopted in the localization phase. Firstly, through binary linear regression the parameters of signal attenuation are calibrated for a certain environment. Then, through differential error estimate method the inner radius and outer radius of rings are got respectively around beacon nodes and blind node. At last, the centroid of the rings overlapping region is taken as the location of blind node. Theoretical analyses and simulation results under different scenarios prove the correctness and validity of the localization algorithm.

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