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Future Internet 2017, 9(4), 73; https://doi.org/10.3390/fi9040073

Quality of Service Based NOMA Group D2D Communications

Department of Electrical and Electronic Engineering, Auckland University of Technology, Auckland 1010, New Zealand
These authors contributed equally to this work.
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Received: 6 October 2017 / Revised: 26 October 2017 / Accepted: 26 October 2017 / Published: 1 November 2017
(This article belongs to the Special Issue Recent Advances in Cellular D2D Communications)
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Abstract

Non-orthogonal multiple access (NOMA) provides superior spectral efficiency and is considered as a promising multiple access scheme for fifth generation (5G) wireless systems. The spectrum efficiency can be further enhanced by enabling device-to-device (D2D) communications. In this work, we propose quality of service (QoS) based NOMA (Q-NOMA) group D2D communications in which the D2D receivers (DRs) are ordered according to their QoS requirements. We discuss two possible implementations of proposed Q-NOMA group D2D communications based on the two power allocation coefficient policies. In order to capture the key aspects of D2D communications, which are device clustering and spatial separation, we model the locations of D2D transmitters (DTs) by Gauss–Poisson process (GPP). The DRs are then considered to be clustered around DTs. Multiple DTs can exist in proximity of each other. In order to characterize the performance, we derive the Laplace transform of the interference at the probe D2D receiver and obtain a closed-form expression of its outage probability using stochastic geometry tools. The performance of proposed Q-NOMA group D2D communications is then evaluated and benchmarked against conventional paired D2D communications. View Full-Text
Keywords: quality of service; device-to-device communication; non-orthogonal multiple access; stochastic geometry quality of service; device-to-device communication; non-orthogonal multiple access; stochastic geometry
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Anwar, A.; Seet, B.-C.; Li, X.J. Quality of Service Based NOMA Group D2D Communications. Future Internet 2017, 9, 73.

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