Throughput fairness trade-offs for downlink non-orthogonal multiple access systems in 5G networks


Abuajwa, Osama and Roslee, Mardeni and Yusoff, Zubaida and Lee, Loo Chuan and Pang, Wai Leong (2022) Throughput fairness trade-offs for downlink non-orthogonal multiple access systems in 5G networks. Heliyon, 8 (11). e11265. ISSN 2405-8440

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In this work, user pairing and power allocation are proposed as a hybrid scheme to maximise throughput and achieve system fairness in the non-orthogonal multiple access (NOMA) system in 5G networks. The proposed approach is designed to improve the throughput and fairness performance of the downlink NOMA system in 5G networks. User pairing and power allocation schemes are separated to reduce resource allocation complexity. Integer linear programming is applied to perform user pairing, and particle swarm optimisation is used for power allocation. Moreover, the optimisation problem is formulated by converting multi-objective functions into a single function using the scalarisation of multi-objective optimisation problems, and the penalty function is used to prevent optimisation from violating the power, fairness, and data rate constraints. Simulation results show that the proposed model outperforms the conventional numerical approach by at least 9% of throughput maximisation and achieves an acceptable fairness rate.

Item Type: Article
Uncontrolled Keywords: Integer linear programming (ILP), Successive interference cancellation (SIC), Penalty function (PF), Particle swarm optimisation (PSO), Jain's fairness index (JFI)
Subjects: Q Science > QA Mathematics > QA71-90 Instruments and machines > QA75.5-76.95 Electronic computers. Computer science
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Nurul Iqtiani Ahmad
Date Deposited: 04 Jan 2023 03:30
Last Modified: 04 Jan 2023 03:30


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