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Optimal harvest-use-store design for delay-constrained energy harvesting wireless communications

Yuan, F; Jin, S; Wong, KK; Zhang, QT; Zhu, H; (2016) Optimal harvest-use-store design for delay-constrained energy harvesting wireless communications. Journal of Communications and Networks , 18 (6) pp. 902-912. 10.1109/JCN.2016.000125. Green open access

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Abstract

Recent advances in energy harvesting (EH) technology have motivated the adoption of rechargeable mobile devices for communications. In this paper, we consider a point-to-point (P2P) wireless communication system in which an EH transmitter with a non-ideal rechargeable battery is required to send a given fixed number of bits to the receiver before they expire according to a preset delay constraint. Due to the possible energy loss in the storage process, the harvest-use-and-store (HUS) architecture is adopted. We characterize the properties of the optimal solutions, for additive white Gaussian channels (AWGNs) and then block-fading channels, that maximize the energy efficiency (i.e., battery residual) subject to a given rate requirement. Interestingly, it is shown that the optimal solution has a water-filling interpretation with double thresholds and that both thresholds are monotonic. Based on this, we investigate the optimal double-threshold based allocation policy and devise an algorithm to achieve the solution. Numerical results are provided to validate the theoretical analysis and to compare the optimal solutions with existing schemes.

Type: Article
Title: Optimal harvest-use-store design for delay-constrained energy harvesting wireless communications
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JCN.2016.000125
Publisher version: http://doi.org/10.1109/JCN.2016.000125
Language: English
Additional information: © 2016 KICS. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Keywords: Batteries, Transmitters, Delays, Energy harvesting, Wireless communication, Throughput
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1540100
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