Hybrid Energy Harvesting Wireless Systems: Performance Evaluation and Insights

Speaker : Neelesh B. Mehta
Indian Institute of Science, Bangalore
Date: 29/05/2017
Time: 2:00 pm - 3:00 pm
Location: LINCS Seminars room


Abstract: Energy harvesting (EH) is an attractive and green solution to the problem of limited lifetime of wireless sensor networks. Unlike a conventional node that dies once it runs out of energy, an EH node harvests energy from the environment and replenishes its rechargeable battery. We investigate a new class of hybrid networks that comprise both EH and conventional nodes and differ from conventional and all-EH wireless sensor networks. We argue that the performance criteria that are used to evaluate conventional and all-EH networks are no longer suitable to evaluate this new class of networks. We propose two new and insightful performance criteria called k-outage duration and n-transmission duration to evaluate these networks. They overcome the pitfalls associated with defining lifetime, which arise because the EH nodes never die but can occasionally run out of energy, and capture the dynamic time evolution, which occurs because the conventional nodes irreversibly drain their batteries. They also account for the inability of the nodes to transmit data due to insufficient battery energy and channel fading. We present computationally efficient novel bounds for evaluating these criteria and gain several insights about the behavior of these networks.
Biography: Neelesh B. Mehta received his B. Tech degree in Electronics and Communications Engineering from the Indian Institute of Technology (IIT) Madras, in 1996, and M.S. and Ph.D. degrees in Electrical Engineering from the California Institute of Technology, Pasadena, USA, in 1997 and 2001, respectively. He is a Professor in the Department of Electrical Communication Engineering at the Indian Institute of Science (IISc), Bangalore. Prior to joining IISc in 2009, he served as a research scientist in USA from 2001 to 2007 in companies such as AT&T Research Labs, Broadcom Corporation, and Mitsubishi Electric Research Labs (MERL).
His research focuses on wireless communications. He has worked on topics related to 3G, 4G, and 5G cellular communication standards, energy harvesting and green wireless sensor networks, cognitive radio, cooperative communications, multi-antenna technologies, and multiple access protocols. He has published 60+ papers in IEEE journals, 3 book chapters, and 70+ conference papers. He is a co-inventor of 30+ issued US patents on these topics.
He served on the Board of Governors of the IEEE Communications Society from 2012-15. He is a Fellow of the Indian National Academy of Engineering (INAE) and the National Academy of Sciences India (NASI). He is a recipient of the Swarnajayanti Fellowship, NASI-Scopus Young Scientist award, Hari Om Ashram Prerit Vikram Sarabhai Research Award, and the INAE Young Engineer award. He serves as an editor of the IEEE Transactions on Communications and as an Executive Editor of the IEEE Transactions on Wireless Communications.