A master-sink based model for on-site tracking of multiple mobile targets in wireless sensor networks

The problem of on-site tracking of a mobile target in wireless sensor networks was introduced recently by B.S. Malhotra et al. (2004). The on-site tracking requires the physical presence of the sink in the area of interest. This paper generalizes the on-site tracking problem for multiple mobile targets and then proposes an energy efficient solution to solve it. The solution is an extension of the ant based method-proposed by B.S. Malhotra et al. for on-site tracking of a single target. The introduction of multiple tracking units (sinks) requires coordination among themselves for efficient tracking. This coordination among the sinks in our approach is achieved through a master sink. We conducted a simulation study and compared our approach with TTDD (H. Luo et al., 2002) and SPC (B.S. Malhotra et al., 2004) for the on-site tracking of multiple targets. Our approach is simple and the simulation results show that it is energy efficient.