An Improved Localization Algorithm for Wireless Sensor Network Using a Mobile Anchor Node

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 to obtain its position. The mobile anchor node moves around in a sensor area to broadcast beacon messages which include its location information. Each stationary sensor node takes the position as a beacon point and calculates its location by computing the intersection area of its communication coverage. After the first round localization, the un-localized sensor nodes can compute their locations with the help of localized stationary sensor nodes. Simulation results show that the accuracy of our proposed localization scheme is better than that of the other schemes using mobile anchor nodes.