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- Title
Joint Usage of OFDMA and NOMA for Uplink Transmissions in Wi-Fi Networks.
- Authors
Tutelian, S. A.; Khorov, E. M.
- Abstract
The number of wireless devices, as well as their traffic volumes, is constantly growing, which degrades the quality of service. To combat this problem, the new Wi-Fi 6 (IEEE 802.11ax) standard introduces the orthogonal frequency division multiple access (OFDMA) mechanism, which allows coordinated multiuser frequency division transmissions. In addition, there is another user multiplexing mechanism, non-orthogonal multiple access (NOMA), that allows transmitting on the same frequencies simultaneously and separating different signals by power level. This paper considers the joint usage of these mechanisms for uplink transmissions in Wi-Fi 6 networks and sets the problem of optimal radio resource allocation between the users to maximize some utility functions, for example, the geometric mean throughput. To solve it, we propose an algorithm that takes into account the channel frequency selectivity and uses OFMDA and NOMA simultaneously. It is shown that the joint usage of OFDMA and NOMA can significantly increase the network throughput and reduce delays.
- Subjects
FREQUENCY division multiple access; MULTIUSER computer systems; WIRELESS Internet; TRAFFIC flow
- Publication
Journal of Communications Technology & Electronics, 2022, Vol 67, pS222
- ISSN
1064-2269
- Publication type
Article
- DOI
10.1134/S1064226922140108