NDLI: System-level evaluation of downlink non-orthogonal multiple access (NOMA) for non-full buffer traffic model

Content Provider	IEEE Xplore Digital Library
Author	Saito, Y. Benjebbour, A. Anxin Li Takeda, K. Kishiyama, Y. Nakamura, T.
Copyright Year	2015
Abstract	For the past few years, we proposed non-orthogonal multiple access (NOMA) as a promising multiple access scheme for further improvement of spectrum efficiency for LTE enhancements and the 5th generation mobile communications system (5G). Currently, the system performance of NOMA, considering practical assumptions, different deployment scenarios and NOMA specific functionalities, including multi-user pairing, transmit power allocation, and combination with MIMO is being evaluated and discussed in academia, industry, and standardization [5-16]. In addition, the most of existing evaluations for NOMA focus on the full buffer traffic model, which is widely adopted for the evaluation of mobile radio access system. However, further investigations with non-full buffer traffic model are also important to clarify the system performance of NOMA for different types of the traffic. This paper investigates the system-level performance of NOMA with non-full buffer traffic model for different levels of packet arrival rates and sizes. In addition, the impact of the scheduling algorithm such as α-fair gradient scheduler, which controls the fairness level of the resource allocation, is also discussed. Based on computer simulations, we show that for the non-full buffer case, NOMA can still provide a large performance gain compared to that of orthogonal multiple access (OMA) in particular for small packet sizes. It is also shown that under full buffer traffic model, α-fair gradient scheduler is able to trade-off between average user packet throughput and 5% user packet throughput; however, this does not hold for the case of non-full buffer traffic model.
Starting Page	94
Ending Page	99
File Size	340567
Page Count	6
File Format	PDF
ISBN	9781479989270
e-ISBN	9781479989287
DOI	10.1109/CSCN.2015.7390427
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-10-28
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiplexing Measurement Interference Rank adaptation Throughput Non-orthogonal multiple access Non-full buffer traffic model NOMA Processor scheduling Α-fair gradient scheduler MIMO Resource management Successive interference canceller Signal to noise ratio
Content Type	Text
Resource Type	Article

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