Correlated energy generation and imperfect State-of-Charge knowledge in energy harvesting devices

Nicolo Michelusi, Leonardo Badia, Ruggero Carli, Kostas Stamatiou, Michele Zorzi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Scopus citations

Abstract

Nowadays, many devices in wireless sensor networks are provided with energy harvesting capability to allow for their continuous operation over long periods of time. In principle, the energy level within each sensor should be managed optimally to ensure the best performance. Network engineers, however, often consider optimality under the idealized assumption of perfect knowledge about the State-of-Charge (SOC) of the device. This information is not always realistic or accurate. In our previous work [1], we showed that optimal policies for sensing, transmission, and battery usage should rather consider uncertainty on the SOC of the device. In this paper, we extend that investigation, therein performed in the idealized scenario of i.i.d. energy arrivals, by considering a correlated energy generation process. We show that the knowledge of the SOC and that of the energy generation process are useful in a complementary manner, that is they can be traded for each other. Moreover, the knowledge on the state of the energy generation process can obviate the need for acquiring accurate SOC information. This investigation paves the road for a new line of research in wireless sensor networks, allowing a tighter interaction between the designers of energy harvesting and battery storage mechanisms on the one hand, and the engineers of network operation and control policies on the other.

Original languageEnglish (US)
Title of host publicationIWCMC 2012 - 8th International Wireless Communications and Mobile Computing Conference
Pages401-406
Number of pages6
DOIs
StatePublished - 2012
Externally publishedYes
Event8th IEEE International Wireless Communications and Mobile Computing Conference, IWCMC 2012 - Limassol, Cyprus
Duration: Aug 27 2012Aug 31 2012

Publication series

NameIWCMC 2012 - 8th International Wireless Communications and Mobile Computing Conference

Conference

Conference8th IEEE International Wireless Communications and Mobile Computing Conference, IWCMC 2012
CountryCyprus
CityLimassol
Period8/27/128/31/12

ASJC Scopus subject areas

  • Computer Networks and Communications

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