Title: Analysis on Energy Efficiency in Tracking Multiple Objects Based on Polygon Tracking Method
Research Area: Computer Science Engineering
Author Name: Josna Jose, Dr. R. Vijayakumar
College Name: Mahatma Gandhi University
Recent advances in integrated electronic devices motivated the use of Wireless Sensor Networks in many applications including
target detection and tracking. Typically, a Wireless Sensor Network is application-driven and mission-critical. Therefore, the
energy efficiency and throughput of target tracking or event detection is critical for the end users, service providers and the
system designers. Multi-Target tracking refers to the problem of jointly estimating the number of targets and their states from
sensor data. In multi- target tracking the location of multiple targets has to be tracked simultaneously. Tracking multiple mobile
targets using sensor networks is a challenging task. This paper proposes a new tracking framework for tracking multiple objects
using polygon tracking method. Polygon tracking method achieves better tracking accuracy and energy efficiency by
constructing active polygonal shaped regions inside the network. This paper also analysing the average energy consumption in
tracking multiple objects based on this framework using NS2 simulations.
SYSTEM ARCHITECTURE
Fig. Polygon Tracking Framework for Multi-Target Tracking
The main steps used to construct the FaceTrack architecture in [3] is used here to construct the framework for tracking
multiple objects. The important steps are shown in Fig 2. The first step is the system initialization, including initial polygon
construction in the plane. A node has all of the corresponding polygon’s information after the network planarization. Initially, all
nodes in the WSN are in a low-power mode [6] and wake up at a predefined period to carry out the sensing for a short time.
Sensor node has three different states of operation, namely, active -when a node is in a vigilant manner and participates in
tracking the target, awakening -when a node awakes for a short period of time, and inactive -when a node is in a sleeping state
[3].Consider that a sensor should be kept awake so long as its participation is needed for a given task.
The framework for energy efficient detection and tracking of multiple objects in wireless sensor networks consist of five
modules such as, i) Topology Formation, ii) Data Gathering, iii) Target Detection and Creating Active Local Environment, iv)
Polygon Tracking, v) Multi Target Tracking.
CONCLUSION
Targets’ tracking is one of the key applications of wireless sensor networks. The main functionality of a surveillance application
of wireless sensor network is to track unauthorized targets in a field. One of the main design issues for a sensor network is
conservation of the energy available at each sensor node. The multi-target tracking using polygon tracking method is a better
approach to use all the possibilities of each technique. From this approach the target detection and tracking become more
accurate and energy efficient. The implementation of new optimum node selection reduces the power consumption of the proposed system. By this method it provides better fast accurate and energy efficient target tracking. It will be well suite in areas
such as military, environment, industry, health, agriculture for tracking targets.
