Uplink NOMA Random Access for UAV-Assisted Communications
- Authors
- Seo, Jun-Bae; Pack, Sangheon; Jin, Hu
- Issue Date
- 8월-2019
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Non-orthogonal multiple access; unmanned aerial vehicle; stability
- Citation
- IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, v.68, no.8, pp.8289 - 8293
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
- Volume
- 68
- Number
- 8
- Start Page
- 8289
- End Page
- 8293
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/63618
- DOI
- 10.1109/TVT.2019.2923441
- ISSN
- 0018-9545
- Abstract
- This correspondence paper investigates uplink nonorthogonal 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 beam width 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.
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