Power-Domain Non-Orthogonal Multiple Access (NOMA) in 5G Systems: Potentials and Challenges
Open accessAbstract
Non-orthogonal multiple access (NOMA) is one of the promising radio access techniques for performance enhancement in next-generation cellular communications. Compared to orthogonal frequency division multiple access, which is a well-known high-capacity orthogonal multiple access technique, NOMA offers a set of desirable benefits, including greater spectrum efficiency. There are different types of NOMA techniques, including power-domain and code-domain. This paper primarily focuses on power-domain NOMA that utilizes superposition coding at the transmitter and successive interference cancellation at the receiver. Various researchers have demonstrated that NOMA can be used effectively to meet both network-level and user-experienced data rate requirements of fifth-generation (5G) technologies. From that perspective, this paper comprehensively surveys the recent progress of NOMA in 5G systems, reviewing the state-of-the-art capacity analysis, power allocation strategies, user fairness, and user-pairing schemes in NOMA. In addition, this paper discusses how NOMA performs when it is integrated with various proven wireless communications techniques, such as cooperative communications, multiple-input multiple-output, beamforming, space–time coding, and network coding among others. Furthermore, this paper discusses several important issues on NOMA implementation and provides some avenues for future research.
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Group scheduling for platooning allocates more resources to the platoon leader than other vehicles, and the platoon leader schedules transmissions for other vehicles to minimize delay and maximize overall throughput.
“Group scheduling [119] for platooning is a specialized resource allocation strategy tailored for 6G V2X sidelink communications, especially in platooning scenarios.In this approach, more resources are allocated to the platoon leader than other vehicles.The platoon leader then efficiently schedules transmissions for the other vehicles to minimize delay and maximize overall throughput.”
From Towards 6G V2X Sidelink: Survey of Resource Allocation—Mathematical Formulations, Challenges, and Proposed Solutions (2024) · cites this paper as [119]
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- Authors
- Islam, S. M. R., Avazov, N., Dobre, O. A., & Kwak, K.-S.
- Affiliations
- Inha University (KR)
- Memorial University of Newfoundland (CA)
- Venue
- IEEE Communications Surveys & Tutorials
- Published
- 2017
- Volume
- 19
- Issue
- 2
- Pages
- 721-742
- ISSN
- 1553-877X (ISSN-L)
- OpenAlex
- W2522847968
- Cited by
- 2,458
- References
- 0
- Citations by year
- 2026: 117 · 2025: 199 · 2024: 251 · 2023: 278 · 2022: 325 · 2021: 325 · 2020: 356 · 2019: 356 · 2018: 183 · 2017: 68
- FWCI
- 93.34
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- IEEE Communications Surveys & Tutorials (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Research Foundation of Korea by the Korean Government (Ministry of Science, ICT and Future Planning) (NRF-2014K1A3A1A20034987)
- Natural Sciences and Engineering Research Council of Canada (NSERC) through its Discovery Program
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Wireless Communication Technologies
- Physical Sciences › Engineering › Electrical and Electronic Engineering › PAPR reduction in OFDM
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced MIMO Systems Optimization
- Keywords
- power-domain non-orthogonal multiple access, 5G, superposition coding, successive interference cancellation, spectral efficiency, power allocation, user fairness, user pairing, cooperative communication, MIMO, beamforming, space-time coding, network coding, channel capacity analysis
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