Location Identification of Sensor Nodes Using Dynamic Path Planning Mobile Nodes in Wireless Sensor Networks

摘要

Localization is a crucial issue in wireless sensor networks. The location accuracy of sensor node increases with the number of beacons points which can provide reference information for localization. However, implementation cost is increased if more number of beacons is used in wirelesssensor networks. Accuracy, cost and scalability are three main factors to be considered when designing localization method with high energy efficiency. Developing a Range-free localization technique with a single mobile beacon equipped with GPS offers coarse positioning accuracy with low computationalexpenses. This paper presents a D* SQUARE algorithm which gives better accuracy with a single anchor node. The path of a mobile anchor node is considered in such a way to optimize the errors and get best location information considering the presence of obstacles. The location of all the sensorsare Called using single mobile beacon and the mechanism is implemented in NS2.