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Article

Non-Orthogonal Multiple Access for Unicast and Multicast D2D: Channel Assignment, Power Allocation and Energy Efficiency

atlanTTic Laboratory, Faculty of Telecommunications Engineering, Universidade de Vigo, 36310 Vigo, Spain
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Academic Editor: Redha Radaydeh
Sensors 2021, 21(10), 3436; https://doi.org/10.3390/s21103436
Received: 22 April 2021 / Revised: 10 May 2021 / Accepted: 11 May 2021 / Published: 14 May 2021
(This article belongs to the Special Issue Device to Device (D2D) Communication)
Non-orthogonal multiple access (NOMA) techniques have emerged in the past years as a solution to approximate the throughput performance of wireless communications systems to their theoretical capacity region. We consider in this paper an optimization-based model for multicast device-to-device (MD2D) communications where the channels are not orthogonal and may be (partially or fully) shared among the transmitters in each cluster. This setting leads naturally to the introduction of NOMA transmitters and receivers who use successive interference cancellation (SIC) to separate the superposed signals. To analyze the role of NOMA in MD2D, its performance impact, potential performance gains and possible shortcomings, we formulate a model that includes SIC operations in the decoders, so that higher rates can be attained when several sources transmit on the same channel(s). We also investigate the energy efficiency of the network (global and max-min) through a dynamic power control algorithm and present a centralized and a semi-distributed solution to these optimization problems. Through numerical simulations, we show that NOMA is able to improve both the sum-rate and the max-min rate of a MD2D network even from a small degree of resource sharing. Furthermore, these gains also improve the global energy efficiency on the network, but not always the max-min energy efficiency of the devices. View Full-Text
Keywords: multicast device-to-device communication; 5G and beyond; non-orthogonal communications multicast device-to-device communication; 5G and beyond; non-orthogonal communications
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MDPI and ACS Style

Hmila, M.; Fernández-Veiga, M.; Rodríguez-Pérez, M.; Herrería-Alonso, S. Non-Orthogonal Multiple Access for Unicast and Multicast D2D: Channel Assignment, Power Allocation and Energy Efficiency. Sensors 2021, 21, 3436. https://doi.org/10.3390/s21103436

AMA Style

Hmila M, Fernández-Veiga M, Rodríguez-Pérez M, Herrería-Alonso S. Non-Orthogonal Multiple Access for Unicast and Multicast D2D: Channel Assignment, Power Allocation and Energy Efficiency. Sensors. 2021; 21(10):3436. https://doi.org/10.3390/s21103436

Chicago/Turabian Style

Hmila, Mariem, Manuel Fernández-Veiga, Miguel Rodríguez-Pérez, and Sergio Herrería-Alonso. 2021. "Non-Orthogonal Multiple Access for Unicast and Multicast D2D: Channel Assignment, Power Allocation and Energy Efficiency" Sensors 21, no. 10: 3436. https://doi.org/10.3390/s21103436

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