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On Operating 5G New Radio Indoor Small Cells in the 60 GHz Unlicensed Band

Authors:
Rony Kumer Saha

Keywords: 5G; 28 GHz; 60 GHz; millimeter-wave; unlicensed band; new radio; small cell; coexistence.

Abstract:
In this paper, we present a time-domain coexistence technique to operate small cells of a Fifth-Generation (5G) New Radio (NR) operator in the 60 GHz band with the access points (APs) of an IEEE 802.11ad/ay, also termed as Wireless Gigabit (WiGig), operator located within a multistory building. Small cells are dual-band enabled operating in the 60 GHz unlicensed and 28 GHz licensed bands. Moreover, we assume that small cells are not Listen-Before-Talk (LBT) feature enabled. Hence, to avoid blocking the transmission of APs of the WiGig operator, an interference avoidance scheme is developed in the time-domain that divides the air time in the 60 GHz band between the incumbent WiGig APs (WiAPs) and 5G NR Unlicensed (NR-U) small cells. We derive average capacity, Spectral Efficiency (SE), and Energy Efficiency (EE) metrics for 5G NR-U small cells. With system-level simulation results, the average capacity, SE, and EE responses for three variants of the 5G NR, namely 5G NR Standalone, 5G NR-U Standalone, and 5G NR-U Anchored are evaluated. It has been shown that NR-U Anchored can achieve the maximum average capacity and EE, whereas NR-U Standalone can achieve the maximum SE when coexisting with a WiGig operator. Because the 60 GHz unlicensed band is present in both schemes, this signifies the importance of operating a 5G NR operator in the unlicensed bands.

Pages: 38 to 43

Copyright: Copyright (c) IARIA, 2021

Publication date: July 18, 2021

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-878-5

Location: Nice, France

Dates: from July 18, 2021 to July 22, 2021