Multiuser Scheduling Schemes for Simultaneous Wireless Information and Power Transfer Over Fading Channels

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Morsi R, Michalopoulos D, Schober R
Zeitschrift: IEEE Transactions on Wireless Communications
Verlag: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Jahr der Veröffentlichung: 2015
Band: 14
Heftnummer: 4
Seitenbereich: 1967-1982
ISSN: 1536-1276
Sprache: Englisch


Abstract

Radio-frequency (RF) energy harvesting presents a viable solution to prolong the lifetime of wireless communication devices. In this paper, we study downlink multiuser scheduling for a time-slotted system with simultaneous wireless information and power transfer. In particular, in each time slot, a single user is scheduled to receive information, whereas the remaining users opportunistically harvest the ambient RF energy. We devise novel online scheduling schemes in which the tradeoff between the users' ergodic rates and their average amount of harvested energy can be controlled. In particular, we modify the well-known maximum signal-to-noise ratio (SNR) and maximum normalized-SNR (N-SNR) schedulers by scheduling the user whose SNR/N-SNR has a certain ascending order (selection order) rather than the maximum one. We refer to these new schemes as order-based SNR/N-SNR scheduling and show that the lower the selection order, the higher the average amount of harvested energy in the system at the expense of a reduced ergodic sum rate. The order-based N-SNR scheduling scheme provides proportional fairness among the users in terms of both the ergodic achievable rate and the average harvested energy. Furthermore, we propose an order-based equal throughput (ET) fair scheduler, which schedules the user having the minimum moving average throughput out of the users whose N-SNR orders fall into a given set of allowed orders. We show that this scheme provides the users with proportionally fair average harvested energy values. In this context, we also derive feasibility conditions for achieving ET with the order-based ET scheduler. Using the theory of order statistics, the average per-user harvested energy and ergodic achievable rate of all proposed scheduling schemes are analyzed and obtained in closed form for independent and nonidentically distributed Rayleigh, Rician, Nakagami-m, and Weibull fading channels. Our closed-form analytical results are corroborated by simulations.


FAU-Autoren / FAU-Herausgeber

Michalopoulos, Diomidis
Lehrstuhl für Digitale Übertragung
Morsi, Rania
Lehrstuhl für Digitale Übertragung
Schober, Robert Prof. Dr.-Ing.
Lehrstuhl für Digitale Übertragung


Zitierweisen

APA:
Morsi, R., Michalopoulos, D., & Schober, R. (2015). Multiuser Scheduling Schemes for Simultaneous Wireless Information and Power Transfer Over Fading Channels. IEEE Transactions on Wireless Communications, 14(4), 1967-1982. https://dx.doi.org/10.1109/TWC.2014.2378261

MLA:
Morsi, Rania, Diomidis Michalopoulos, and Robert Schober. "Multiuser Scheduling Schemes for Simultaneous Wireless Information and Power Transfer Over Fading Channels." IEEE Transactions on Wireless Communications 14.4 (2015): 1967-1982.

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Zuletzt aktualisiert 2018-14-09 um 22:38