Quality Tradeoffs in Object Tracking with Duty-Cycled Sensor Networks
ARMY RESEARCH LAB ADELPHI MD
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Extending the lifetime of wireless sensor networks requires energy-conserving operations such as duty-cycling. However such operations may impact the effectiveness of high-fidelity real-time sensing tasks, such as object tracking, which require high accuracy and short response times. In this paper, we quantify the influence of different duty-cycle schemes on the bearings-only object tracking efficiency. Specifically, we use the Maximum Likelihood localization technique to analyze the accuracy limits of object location estimates under different response latencies considering variable network density and duty-cycle parameters. Moreover, we study the tradeoffs between accuracy and response latency under various scenarios and motion patterns of the object. We have also investigated the effects of different duty-cycled schedules on the tracking accuracy using acoustic sensor data collected at Aberdeen Proving Ground, Maryland, by the U.S. Army Research Laboratory ARL.
- Radio Communications