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A Study on the Impact of Out-of-Band Emissions on Performance of 5G New Radio-Unlicensed (NR-U) Networks

  • DATA TRANSMISSION IN COMPUTER NETWORKS
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Abstract

New Radio-Unlicensed (NR-U) is a technology that allows fifth generation mobile networks to utilize unlicensed frequency bands, in particular, the 5 GHz band. To increase throughput, an NR-U base station (gNB) can simultaneously operate in several frequency channels within the 5 GHz band. However, the gNB cannot always transmit data through one channel and, at the same time, perform the channel access procedure in another channel due to the out-of-band emission problem, which leads to channel underutilization. As a result, the throughput of NR-U networks can heavily depend on the out-of-band emission level. In this paper, by means of simulation, the impact of out-of-band emissions on NR-U performance is studied when NR-U uses all channel access methods defined in the specification. It is shown that the out-of-band emission level affects the choice of channel access method optimal in terms of throughput. We also show that out-of-band emissions do not always have a negative impact on NR-U performance; sometimes they make it possible to achieve more than 30% throughput gain.

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Notes

  1. This study uses the same self-deferral period as in [4–7].

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Funding

This study was supported by the Russian Foundation for Basic Research, project no. 18-07-01223 a.

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Authors and Affiliations

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

    V. D. Zhdanovskiy, V. A. Loginov & A. I. Lyakhov

  2. Moscow Institute of Physics and Technology, Moscow, Russia

    V. D. Zhdanovskiy & A. I. Lyakhov

  3. National Research University Higher School of Economics, Moscow, Russia

    V. A. Loginov

Authors
  1. V. D. Zhdanovskiy
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  2. V. A. Loginov
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  3. A. I. Lyakhov
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Corresponding authors

Correspondence to V. D. Zhdanovskiy, V. A. Loginov or A. I. Lyakhov.

Additional information

Translated by Yu. Kornienko

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Zhdanovskiy, V.D., Loginov, V.A. & Lyakhov, A.I. A Study on the Impact of Out-of-Band Emissions on Performance of 5G New Radio-Unlicensed (NR-U) Networks. J. Commun. Technol. Electron. 66, 784–795 (2021). https://doi.org/10.1134/S106422692106022X

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  • DOI: https://doi.org/10.1134/S106422692106022X

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