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Joint Usage of OFDMA and NOMA for Uplink Transmissions in Wi-Fi Networks

  • DATA TRANSMISSION IN COMPUTER NETWORKS
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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.

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Notes

  1. In the downlink channel this method was available starting from IEEE 802.11ac.

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Funding

The work was carried out at the Kharkevich Institute for Information Transmission Problems of the Russian Academy of Sciences and was supported by the Russian Science Foundation, project no. 21-19-00846.

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Authors and Affiliations

  1. Kharkevich Institute for Information Transmission Problems of the Russian Academy of Sciences, Moscow, Russia

    S. A. Tutelian & E. M. Khorov

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  1. S. A. Tutelian
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  2. E. M. Khorov
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Correspondence to S. A. Tutelian or E. M. Khorov.

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The authors declare that they have no conflicts of interest.

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Translated by E. Oborin

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Tutelian, S.A., Khorov, E.M. Joint Usage of OFDMA and NOMA for Uplink Transmissions in Wi-Fi Networks. J. Commun. Technol. Electron. 67 (Suppl 2), S222–S232 (2022). https://doi.org/10.1134/S1064226922140108

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