DocumentCode :
3038507
Title :
Adaptive Duty Cycling for Energy Harvesting Systems
Author :
Hsu, Jason ; Zahedi, Sadaf ; Kansal, Aman ; Srivastava, Mani ; Raghunathan, Vijay
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA
fYear :
2006
fDate :
4-6 Oct. 2006
Firstpage :
180
Lastpage :
185
Abstract :
Harvesting energy from the environment is feasible in many applications to ameliorate the energy limitations in sensor networks. In this paper, we present an adaptive duty cycling algorithm that allows energy harvesting sensor nodes to autonomously adjust their duty cycle according to the energy availability in the environment. The algorithm has three objectives, namely: (a) achieving energy neutral operation, i.e., energy consumption should not be more than the energy provided by the environment; (b) maximizing the system performance based on an application utility model subject to the above energy-neutrality constraint; and (c) adapting to the dynamics of the energy source at run-time. We present a model that enables harvesting sensor nodes to predict future energy opportunities based on historical data. We also derive an upper bound on the maximum achievable performance assuming perfect knowledge about the future behavior of the energy source. Our methods are evaluated using data gathered from a prototype solar energy harvesting platform and we show that our algorithm can utilize up to 58% more environmental energy compared to the case when harvesting-aware power management is not used
Keywords :
solar energy conversion; wireless sensor networks; adaptive duty cycling; application utility model; duty cycle; energy consumption; energy harvesting sensor nodes; energy harvesting systems; energy neutral operation; energy-neutrality constraint; sensor networks; solar energy harvesting platform; Availability; Energy consumption; Energy management; Environmental management; Predictive models; Prototypes; Runtime environment; Solar energy; System performance; Upper bound; Algorithms; Design; Energy harvesting; energy neutral operation; low power design;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Low Power Electronics and Design, 2006. ISLPED'06. Proceedings of the 2006 International Symposium on
Conference_Location :
Tegernsee
Print_ISBN :
1-59593-462-6
Type :
conf
DOI :
10.1109/LPE.2006.4271832
Filename :
4271832
Link To Document :
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