Lighweight Target Tracking Using Passive Traces in Sensor Networks

TL;DR

This paper introduces a passive, energy-efficient target tracking method in sensor networks that relies on sensors recording and spreading traces, enabling scalable and effective tracking with reduced energy use.

Contribution

It proposes a novel passive tracking protocol that reduces energy consumption and improves scalability compared to traditional active tracking methods.

Findings

The protocol is energy-efficient and reduces communication overhead.

Simulation results show quick and accurate target localization.

The method balances energy use and tracking latency effectively.

Abstract

We study the important problem of tracking moving targets in wireless sensor networks. We try to overcome the limitations of standard state of the art tracking methods based on continuous location tracking, i.e. the high energy dissipation and communication overhead imposed by the active participation of sensors in the tracking process and the low scalability, especially in sparse networks. Instead, our approach uses sensors in a passive way: they just record and judiciously spread information about observed target presence in their vicinity; this information is then used by the (powerful) tracking agent to locate the target by just following the traces left at sensors. Our protocol is greedy, local, distributed, energy efficient and very successful, in the sense that (as shown by extensive simulations) the tracking agent manages to quickly locate and follow the target; also, we achieve good trade-offs between the energy dissipation and latency.