An Operational model for Mobile Target Tracking in Wireless Sensor Networks

The wireless sensor network is an emerging technology that may greatly facilitate human life by providing ubiquitous sensing, computing, monitoring and communication capability, through which people can more closely interact with the environment wherever he/she goes. To be context-aware, one of the central issues in sensor networks is location tracking, whose goal is to monitor the roaming path of a moving target. Its application is observed in several fields such as the meteorology, the chemistry, the road traffic, the battle field and so on... When a sensor detects a target in its transmission range it informs all other sensors by a short message (yes/no) in order to monitor least movements of the target. According to the strategy used several architectures were proposed in the literature. In this paper we propose a hexagonal architecture as follows; we assign coordinates in 2D plane to each node (memorized in its memory) and an unique identify number ID before the random deployment in any geographical area in order to form a hexagonal network. After the random deployment, a collaborative work initiated by the sensor which have coordinates (0, 0), allows each sensor to be able to find its position. We finally use the hexagonal network properties to define our tracking algorithm