Title: Throughput and delay optimisation for NOMA systems with energy harvesting

Authors: Nadhir Ben Halima; Hatem Boujemâa

Addresses: Higher Colleges of Technology, Sharjah Women's College, P.O. Box 7947, Sharjah, UAE ' Higher School of Communications of Tunis, COSIM Research Laboratory, Route de Raoued Km 3.5, 2083, El Ghazala, Ariana, Tunisia

Abstract: In this paper, we analyse and optimise the total throughput and average delay in non orthogonal multiple access (NOMA) with energy harvesting. The source harvest energy from radio frequency (RF) signals received from another node A. Node A can be any node transmitting RF signals. The frame with duration T contains two time slots. The first slot has duration δT and is dedicated to energy harvesting where 0 < δ < 1 is harvesting duration percentage. The second slot has duration (1 - δ)T and is dedicated to transmission of a linear combination of symbols to N NOMA users. We optimise harvesting duration and power allocation coefficient to maximise the total throughput or minimise the average delay. Our theoretical derivation are valid for Rayleigh fading channels.

Keywords: NOMA; non orthogonal multiple access; energy harvesting; Rayleigh channel; optimal power allocation; optimal harvesting duration; packets' waiting time; delay analysis.

DOI: 10.1504/IJSNET.2020.111234

International Journal of Sensor Networks, 2020 Vol.34 No.3, pp.153 - 161

Received: 22 Mar 2020
Accepted: 24 Apr 2020

Published online: 16 Nov 2020 *

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