Study on Wireless Sensor Network Boundary Localization Based on RSSI

To get the accuracy of Wireless Sensor Network boundary node localization and decrease error, this paper present an arithmetic on RSSI (Received Signal Strength Indicator) weighting circulate localization. This arithmetic is based on RSSI, combination of least squares estimate localization algorithm and weighted centroid circulation method. The algorithm firstly is introduced into threshold method for screening of anchor nodes, and then uses the least squares estimate positioning the initial value. Finally, through the weighted centroid circulation method obtain the final measurement coordinates of boundary node. Through experiment simulation, In the case of simulating the real environment, this method can reduce maximum error of the boundary node localization, accurately obtain the boundary node positioning coordinates, improve the precision of the boundary localization.