Skip to content. Skip to navigation
CIM Menus
 

Tracking with Sleepy Sensors ( joint work with J. Fuemmeler)


Prof. Venu Veeravalli < vvv@uiuc.edu >
Dept of ECE University of Illinois at Urbana-Champaign

March 20, 2006 at  10:30 AM
Zames Seminar Room - MC437

We study the problem of tracking an object that is moving randomly through a dense network of wireless sensors. We assume that each sensor has a limited range for detecting the presence of the object, and that the network is sufficiently dense so that the sensors cover the area of interest. In order to conserve energy the sensors may be put into a sleep mode with a timer that determines the sleep duration. We assume that a sensor that is asleep cannot be communicated with or woken up. Thus the sleep duration needs to be determined at the time the sensor goes to sleep based on all the information available to the sensor. The objective is to track the location of the object to within the accuracy of the range of the sensor. Having sleeping sensors in the network could result in tracking errors, and hence there is a trade-off between the energy savings and the tracking error that result from sleeping. We consider the design of sleeping policies that optimize this trade-off.