WSN Node Localization Algorithm Assisted by Multi-power Level Mobile Anchor Node

摘要

In this paper, we present an improved localization algorithm for wireless sensor network using a mobile anchor node which is equipped with a GPS receiver. The mobile anchor node moves around in the sensor area and broadcasts beacon messages regularly using transmission power set in advance. Unknown node estimates its position through calculating herage value of coordinates of those received beacon messages. If an unknown node only receives one beacon message, it uses beacon position replacing its own. Through theoretical analysis and simulation, the proposed localization algorithm is iittle amount of calculation, high positioning accuracy and can restrict the positioning errors within determined extent