Revisiting Censoring in Energy Harvesting Wireless Sensor Networks

Sen Gupta, Sayan and Mehta, Neelesh B (2019) Revisiting Censoring in Energy Harvesting Wireless Sensor Networks. In: 2018 IEEE Global Communications Conference, GLOBECOM 2018 - Proceedings, 9-13 December, 2018, Abu Dhabi National Exhibition Centre (ADNEC)Abu Dhabi; United Arab Emirates;.

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Abstract

Censoring improves the lifetime of conventional wireless sensor networks (WSNs) by reducing the number of sensor node transmissions. However, this comes at the expense of performance since measurements from fewer nodes are available. We show that in energy harvesting (EH) WSNs, in which the sensor nodes harvest energy from the environment, this trade-off is fundamentally different. For a general model in which the nodes experience independent and non-identical fading and the EH process at a node is stationary and ergodic, we derive a lower bound on the mean squared error (MSE). It leads to an insightful and explicit characterization of the optimum censoring threshold for each node. We show that it is the point at which the probability that an EH node has sufficient energy to transmit becomes 1. We also analyze the MSE outage probability, which is an alternate and widely used performance measure, which characterizes the impact of channel fading.

Item Type:	Conference Proceedings
Series.:	IEEE Global Communications Conference
Publisher:	IEEE
Additional Information:	IEEE Global Communications Conference (GLOBECOM), Abu Dhabi, U ARAB EMIRATES, DEC 09-13, 2018
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering > Electrical Communication Engineering - Technical Reports
Date Deposited:	12 Jul 2019 09:13
Last Modified:	12 Jul 2019 09:13
URI:	http://eprints.iisc.ac.in/id/eprint/62902

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