论文标题
城市火车上C波段5G NR FR1（低6 GHz）上行MIMO的性能评估
Performance Evaluations of C-Band 5G NR FR1 (Sub-6 GHz) Uplink MIMO on Urban Train
论文作者
论文摘要
由于最近对由社交媒体平台，UHD 4K/8K视频和VR/AR内容进行快速开发的移动网络上的巨大上行链路吞吐量的需求，现已在商业5G网络上部署了Uplink Mimo（UL-MIMO），并为消费者提供了合理的支持用户设备（UE）。通过使用多达2 tx的天线端口，可以在理想条件下实现高达上行链路吞吐量的两倍，同时在具有挑战性的条件下，UE比UE相比，上行链路的性能提高了两倍。 在日本，其中一家运营商软银在2021年10月推出了5G独立无线访问（FWA）申请的5G独立服务。移动服务于2022年5月开始，为C-Band或Band N77（3.7 GHz）提供了支持UE的UL-MIMO。在本文中，将将具有UL-MIMO能力UE的上行链路性能与火车上的常规UL-1TX UE进行比较，这是日本人最流行的运输方法。结果表明，在更有利的信号条件下，移动列车的吞吐量平均要高出19.8％，高达33.5％。还观察到了下行链路5G NR SS-RSRP与上行链路吞吐量之间的中等关系。
Due to the recent demand for huge Uplink throughput on Mobile networks driven by the rapid development of social media platforms, UHD 4K/8K video, and VR/AR contents, Uplink MIMO (UL-MIMO) has now been deployed on commercial 5G networks with reasonable availability of supported User Equipment (UE) for consumers. By utilizing up to 2 Tx antenna ports, UL-MIMO-capable UE promised to achieve up to two times the uplink throughput in ideal conditions, while providing improved uplink performance over UE with 1Tx in challenging conditions. In Japan, SoftBank, one of the carriers, introduced 5G Standalone (SA) services for the Fixed Wireless Access (FWA) application back in October 2021. Mobile services were commenced in May 2022, which provide UL-MIMO for supported UE on C-Band or Band n77 (3.7 GHz). In this paper, the uplink performance of UL-MIMO-capable UE will be compared against the conventional UL-1Tx UE on trains, which is the most popular method of transportation for the Japanese. The results show that UL-MIMO-capable UE delivers an average of 19.8% better throughput on moving trains with up to 33.5% in the more favorable signal conditions. A moderate relationship between downlink 5G NR SS-RSRP and uplink throughput also has been observed.
