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Adaptive Duty Cycle Control with Queue Management in Wireless Sensor Networks

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2 Author(s)
Heejung Byun ; Dept. of Inf. & Telecommun. Eng., Suwon Univ., Hwaseong, South Korea ; Junglok Yu

This paper proposes a control-based approach to the duty cycle adaptation for wireless sensor networks. The proposed method controls the duty cycle through the queue management to achieve high-performance under variable traffic rates. To have energy efficiency while minimizing the delay, we design a feedback controller, which adapts the sleep time to the traffic change dynamically by constraining the queue length at a predetermined value. In addition, we propose an efficient synchronization scheme using an active pattern, which represents the active time slot schedule for synchronization among sensor nodes, without affecting neighboring schedules. Based on the control theory, we analyze the adaptation behavior of the proposed controller and demonstrate system stability. The simulation results show that the proposed method outperforms existing schemes by achieving more power savings while minimizing the delay.

Published in:

Mobile Computing, IEEE Transactions on  (Volume:12 ,  Issue: 6 )