Uplink NOMA random access for UAV-assisted communications

Jun Bae Seo, Sangheon Pack, Hu Jin

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


This correspondence paper investigates uplink non-orthogonal multiple access (NOMA) for unmanned aerial vehicle base stations (UAV-BSs). Users under the service area of a UAV-BS perform NOMA random access (RA) by controlling their transmit power so that the UAV-BS can receive one of two predefined power levels. This facilitates successive interference cancellation (SIC) at the UAV-BS. This correspondence paper shows the maximum stable throughput of uplink NOMA RA in terms of the altitude and beamwidth of the UAV-BS. Further, we propose a stabilizing algorithm, with which a UAV-BS broadcasts the throughput-maximal retransmission probability every slot, while users access the channel based on the retransmission probability. Extensive simulations show that the proposed algorithm can achieve the maximum throughput 0.5869 (packets/slot) and stabilize the system with time-varying traffic.

Original languageEnglish
Article number2923441
Pages (from-to)8289-8293
Number of pages5
JournalIEEE Transactions on Vehicular Technology
Issue number8
Publication statusPublished - 2019 Aug

Bibliographical note

Funding Information:
Manuscript received January 4, 2019; revised April 1, 2019 and June 11, 2019; accepted June 12, 2019. Date of publication June 17, 2019; date of current version August 13, 2019. This work was supported in part by DST under Grant RP03514G, in part by the NRF Grant funded by the Korea government (MSIT) under Grant NRF-2018R1C1B6008126, and in part by National Research Foundation (NRF) of Korea Grant funded by the Korean Government (MSIP) under Grant 2017R1E1A1A01073742. The review of this paper was coordinated by Prof. H.-F. Lu. (Corresponding author: Hu Jin.) J.-B. Seo is with the Department of Electrical Engineering, Indian Institute of Technology Delhi, Hauz Khas 110016, India (e-mail: jbseo@iitd.ac.in).

Publisher Copyright:
© 2019 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.


  • Non-orthogonal multiple access
  • Stability
  • Unmanned aerial vehicle

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics


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