Implications of energy profile and storage on energy harvesting sensor link performance

Authors:
Bhargav Medepally;Neelesh B. Mehta;Chandra R. Murthy
Affiliations:
Electrical Communications Engineering Dept., Indian Institute of Science, Bangalore, India;Electrical Communications Engineering Dept., Indian Institute of Science, Bangalore, India;Electrical Communications Engineering Dept., Indian Institute of Science, Bangalore, India
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

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Abstract

Energy harvesting sensors (EHS), which harvest energy from the environment in order to sense and then communicate their measurements over a wireless link, provide the tantalizing possibility of perpetual lifetime operation of a sensor network. The wireless communication link design problem needs to be revisited for these sensors as the energy harvested can be random and small and not available when required. In this paper, we develop a simple model that captures the interactions between important parameters that govern the communication link performance of a EHS node, and analyze its outage probability for both slow fading and fast fading wireless channels. Our analysis brings out the critical importance of the energy profile and the energy storage capability on the EHS link performance. Our results show that properly tuning the transmission parameters of the EHS node and having even a small amount of energy storage capability improves the EHS link performance considerably.