Α‐Fair resource allocation in non‐orthogonal multiple access systems. Issue 2 (24th January 2018)

• Record Type: Journal Article
• Authors: Pham, Quoc‐Viet; Hwang, Won‐Joo
• Is Part Of: IET communications. Volume 12:Issue 2(2018)
• Page Start: 179
• Page End: 183
• Publication Date: 2018-01-24
• Subjects: next generation networks -- radio access networks; α‐fair resource allocation -- non‐orthogonal multiple access systems -- NOMA system -- radio access technique -- next‐generation networks; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2017.0326
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : A non‐orthogonal multiple access (NOMA) system is now considered as a promising radio access technique for next‐generation networks owing to its benefits, e.g. spectral efficiency improvement. Due to the successive interference cancellation order at receivers, fairness among users in NOMA may not be guaranteed. In this study, the authors focus on α ‐fair resource allocation in NOMA. The complexity of the considered problem is then analysed. In particular, the problem is shown to be convex when 1 ≤ α < ∞ and α = ∞, non‐deterministic polynomial‐time (NP)‐hard when 0 < α < 1, and polynomial‐time solvable when α = 0 . Finally, simulation results are provided to examine the effects of the fairness degree on the system performance and verify the effectiveness of the proposed algorithms.