Analysis of Distance Measurement Based on RSSI

Wireless Sensor Networks,a novel technology about acquiring and processing information,have been proposed for a multitude of diverse applications.Range-based localization must measure distances between neighboring nodes.Received signal strength indication(RSSI),featuring low communication overhead and low complexity,is our basis of localization on the energy constrained sensor nodes.We first analyze the theory of distance measurement based on RSSI,and then validate that RSSI behavior is reproducible and suffers moderate but well-defined variations as a consequence of dynamic factors.Therefore,it can be concluded that RSSI is applicable,if we only take some measurements such as weight and mean value to eliminate the dynamic factors.The experiments show that measurement error is 2 meters within 15 meter.