Wireless Sensor Networks are networks of large number of tiny, battery powered sensor nodes having limited on-board storage, processing, and radio capabilities to monitor physical or environmental conditions, such as temperature, vibration, pressure, sound or motion, and then collectively send this information to a central computing system, called the base station or sink. Using wireless sensor networks (WSN) to track a moving object provided a practical solution to a wide variety of applications including, for example, wild life, military operations, intruder tracking and monitoring in indoor office buildings. While much work has been done in this area, failures are not considered in most of the existing solutions. However, failures have to be handled carefully in target tracking applications because of their unpredictable and dynamic nature of communication, such as sensor energy depletion, severe environment conditions, unstable communication links and malicious attacks. Traditional approaches of fault tolerance are not well suited to address these new challenges. Therefore we have proposed a Hierarchical Localization Tracking Scheme (HLTS) for the tracking of moving object. Extensive simulations are carried out using NS-2 show that our algorithm achieves good performance.

Wireless Sensor Network Hierarchical Localization Tracking Scheme Network Lifetime Target Detection Probability Error Ratio