Anchor Free Positioning for Target Tracking in Wireless Sensor Networks

Abstract

Wireless sensor networks are extremely being used in di erent environments to perform various monitoring tasks such as search, rescue, disaster relief, target tracking and a number of tasks in smart environments. In most sensor network applications, the information gathered by micro-sensors will be meaningless unless the location from where the information is obtained is known. This makes localization capabilities highly desirable in sensor networks. Till now, various localization algorithms have been proposed to ful ll the same objective. However, all of these algorithms are dependent on various factors to get the location information like GPS devices, a large number of anchor nodes, known network topology, communication cost etc. Accuracy is one more concern, which have to be look upon because it is directly dependent on the above mentioned factors. So, keeping all these things in mind, the main aim is to reduce the dependency on the anchor nodes without a ecting the accuracy. Previous researches have shown the success of virtual coordinates in a wide variety of ad hoc and sensornet environments for the routing purpose. So this thesis report introduced the concept of virtual coordinates to make localization system anchor free, as well as proposed a new algorithm for the detection of boundary nodes of the network and the holes in the network having less percentage of false positivity.