Non-Orthogonal Multiple Access in Large-Scale Heterogeneous Networks

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Title: Non-Orthogonal Multiple Access in Large-Scale Heterogeneous Networks
Authors: Liu, Y
Qin, Z
Elkashlan, M
Nallanathan, A
McCann, JA
Item Type: Journal Article
Abstract: In this paper, the potential benefits of applying non-orthogonal multiple access (NOMA) technique in K -tier hybrid heterogeneous networks (HetNets) is explored. A promising new transmission framework is proposed, in which NOMA is adopted in small cells and massive multiple-input multiple-output (MIMO) is employed in macro cells. For maximizing the biased average received power for mobile users, a NOMA and massive MIMO based user association scheme is developed. To evaluate the performance of the proposed framework, we first derive the analytical expressions for the coverage probability of NOMA enhanced small cells. We then examine the spectrum efficiency of the whole network by deriving exact analytical expressions for NOMA enhanced small cells and a tractable lower bound for massive MIMO enabled macro cells. Finally, we investigate the energy efficiency of the hybrid HetNets. Our results demonstrate that: 1) the coverage probability of NOMA enhanced small cells is affected to a large extent by the targeted transmit rates and power sharing coefficients of two NOMA users; 2) massive MIMO enabled macro cells are capable of significantly enhancing the spectrum efficiency by increasing the number of antennas; 3) the energy efficiency of the whole network can be greatly improved by densely deploying NOMA enhanced small cell base stations; and 4) the proposed NOMA enhanced HetNets transmission scheme has superior performance compared with the orthogonal multiple access-based HetNets.
Issue Date: 17-Jul-2017
Date of Acceptance: 22-May-2017
URI: http://hdl.handle.net/10044/1/59769
DOI: https://dx.doi.org/10.1109/JSAC.2017.2726718
ISSN: 0733-8716
Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Start Page: 2667
End Page: 2680
Journal / Book Title: IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
Volume: 35
Issue: 12
Copyright Statement: © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Keywords: Science & Technology
Technology
Engineering, Electrical & Electronic
Telecommunications
Engineering
HetNets
massive MIMO
NOMA
user association
stochastic geometry
MASSIVE-MIMO
HETNETS
5G
ASSOCIATION
PERFORMANCE
SYSTEMS
Science & Technology
Technology
Engineering, Electrical & Electronic
Telecommunications
Engineering
HetNets
massive MIMO
NOMA
user association
stochastic geometry
MASSIVE-MIMO
HETNETS
5G
ASSOCIATION
PERFORMANCE
SYSTEMS
0906 Electrical And Electronic Engineering
1005 Communications Technologies
0805 Distributed Computing
Networking & Telecommunications
Publication Status: Published
Conference Place: Washington, DC
Online Publication Date: 2017-07-17
Appears in Collections:Faculty of Engineering
Computing



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