The International Telecommunication Union defined the requirements for 5G in the International Mobile Telecommunications 2020 (IMT-2020) standard in 2017. Since then, advances in technology and standardization have made the ubiquitous deployment of 5G via satellite a practical possibility, for example, in locations where terrestrial networks (TNs) are not available. However, it may be difficult for satellite networks to achieve the same performance as TNs. To address this, the IMT-2020 requirements for satellite radio interface technology have recently been established. In this paper, these requirements are evaluated through system simulations for the 3rd Generation Partnership Project New Radio non-terrestrial networks with a low Earth orbit satellite. The focus is on the throughput, area traffic capacity, and spectral efficiency requirements. It is observed that the downlink (DL) requirements can be met for user equipment with 2 receive antenna elements. The results also reveal that frequency reuse factor 1 (FRF1) may outperform FRF3 in DL with a dual-antenna setup, which is a surprising finding since FRF3 is typically considered to outperform FRF1 due to better interference reduction. For uplink (UL), 1 transmit antenna is sufficient to meet the requirements by a relatively large margin - a promising result given that UL is generally more demanding.

翻译：国际电信联盟于2017年在国际移动通信2020（IMT-2020）标准中定义了5G的各项要求。此后，技术与标准化领域的进步使得通过卫星实现5G的泛在部署成为实际可能，例如在缺乏地面网络（TN）覆盖的区域。然而，卫星网络可能难以达到与地面网络相同的性能水平。为此，IMT-2020近期专门制定了卫星无线电接口技术的相关要求。本文针对采用低地球轨道卫星的第三代合作伙伴计划新无线电非地面网络，通过系统仿真评估了这些要求，重点关注吞吐量、区域业务容量和频谱效率指标。研究发现，对于配备2个接收天线单元的用户设备，下行链路（DL）要求能够得到满足。结果还揭示，在双天线配置下，频率复用因子1（FRF1）在下行链路中可能优于FRF3——这一发现令人意外，因为通常认为FRF3因具有更好的干扰抑制能力而表现更优。对于上行链路（UL），单根发射天线即可显著超出要求值——鉴于上行链路通常要求更为严苛，这一结果颇具前景。