Efficient power allocation in downlink multi‐cell multi‐user NOMA networks. Issue 4 (1st March 2019)

• Record Type: Journal Article
• Authors: Khan, Wali Ullah; Yu, Zhiyuan; Yu, Shanshan; Sidhu, Guftaar Ahmad Sardar; Liu, Ju
• Is Part Of: IET communications. Volume 13:Issue 4(2019)
• Page Start: 396
• Page End: 402
• Publication Date: 2019-03-01
• Subjects: multi‐access systems -- optimisation -- cellular radio -- MIMO communication -- iterative methods; efficient power allocation -- downlink multicell multiuser NOMA networks -- nonorthogonal multiple access -- promising radio access technique -- upcoming fifth generation networks -- downlink multicell multiuser cellular network -- multiple random distributed user equipments -- UE -- NOMA protocol -- sum network capacity -- transmission power budgets -- optimal power allocation -- nonoptimal NOMA -- orthogonal multiple access schemes; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2018.5251
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : Recently, non‐orthogonal multiple access (NOMA) has been considered as a promising radio access technique for the upcoming fifth generation networks. In this study, the authors consider the downlink multi‐cell multi‐user cellular network, where the base station (BS) located in the centre of each cell intends to communicate with multiple random distributed user equipments (UEs) using NOMA protocol. They formulate an optimisation problem to increase the sum network capacity under various practical constraints. Especially, the transmission power budgets for BSs, power allocation for UEs, and minimum rate requirements per UE are optimised. Moreover, they obtain the optimal power allocation via local optimal solution iteratively, which satisfies Karush–Kuhn–Tucker conditions. The simulation results show that the proposed scheme can converge after few iterations and achieve higher sum capacity compared with the non‐optimal NOMA and orthogonal multiple access schemes.