Prof. Ekram Hossain
University of Manitoba, Canada
20th December 2022, 4:00pm - 5:00pm (GST)
Self-Sustainability of Energy Harvesting Systems: Concept and Analysis
Ambient energy harvesting is touted as a low cost solution to prolong the life of low-powered devices, reduce the carbon footprint, and make the system self-sustainable. Most research to date have focused either on the physical aspects of energy conversion process or on the optimal consumption policies of the harvested energy at the system level. However, although intuitively understood, the idea of “self-sustainability” has seldom been studied as a performance metric. In this talk, I will provide a mathematical definition of the concept of self-sustainability of a harvest-store-consume system, based on the complementary idea of eventual energy outage. For the considered system, I will assume an infinite battery capacity, stochastic energy arrivals, and fixed energy consumption rate. Using the random walk theory, I will identify the necessary condition for the system to be self-sustainable. General formulas for the self-sustainability probability will be given and also an exponential upper bound for eventual energy outage probability will be derived. For the special case when the energy arrival follows a Poisson process, an exact formula for the eventual energy outage probability can be obtained. I will also present some Monte-Carlo simulations to verify the analysis.
Ekram Hossain (F’15) is a Professor and the Associate Head (Graduate Studies) in the Department of Electrical and Computer Engineering at University of Manitoba, Canada. He is a Member (Class of 2016) of the College of the Royal Society of Canada. Also, he is a Fellow of the Canadian Academy of Engineering and a Fellow of the Engineering Institute of Canada. Dr. Hossain's current research interests include design, analysis, and optimization beyond 5G cellular wireless networks. He was elevated to an IEEE Fellow “for contributions to spectrum management and resource allocation in cognitive and cellular radio networks". He received the 2017 IEEE ComSoc TCGCC (Technical Committee on Green Communications & Computing) Distinguished Technical Achievement Recognition Award “for outstanding technical leadership and achievement in green wireless communications and networking”. Dr. Hossain has won several research awards including the “2017 IEEE Communications Society Best Survey Paper Award and the 2011 IEEE Communications Society Fred Ellersick Prize Paper Award. He was listed as a Clarivate Analytics Highly Cited Researcher in Computer Science in 2017, 2018, 2019, 2020, and 2021. Currently he serves as an Editor for the IEEE Transactions on Mobile Computing. Previously, he served as the Editor-in-Chief (EiC) of the IEEE Press (2018-2021) and the EiC of the IEEE Communications Surveys and Tutorials (2012-2016). He was a Distinguished Lecturer of the IEEE Communications Society and the IEEE Vehicular Technology Society. He served as the Director of Magazines for the IEEE Communications Society (2020-2021). Also, he was an elected member of the Board of Governors of the IEEE Communications Society for the term 2018-2020.