An In-Depth Study of Uplink Performance of 5G mmWave Networks
An In-Depth Study of Uplink Performance of 5G mmWave Networks
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5G毫米波网络上行链路性能的深入研究
DOI：
10.1145/3538394.3546042
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Moinak Ghoshal, Z. Jonny
中科院分区：
文献类型：
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作者：
Moinak Ghoshal, Z. Jonny
备受期待的5G毫米波技术有望实现许多面向上行链路的延迟关键型应用(LCA)，如增强现实和互联自动驾驶汽车。尽管如此，最近的测量研究主要集中在其下行链路性能上。在这项工作中，我们对美国3个主要城市和2家移动运营商的商用5G毫米波网络的上行性能进行了系统的研究。我们的研究有三点贡献。(1)研究表明，5G毫米波上行链路的性能因地域而异，在带宽和延迟方面显著高于LTE，但通常不稳定且次优，这可能会降低LCA性能。(2)我们对控制消息和物理层KPI的分析表明，性能不佳的根本原因是5G毫米波的根本原因，不是通过简单的网络配置调整就能轻松解决的。(3)我们确定了各种设计和部署优化，5G运营商可以探索这些优化，以将5G毫米波性能提高到最终支持LCA所需的水平。
The highly anticipated 5G mmWave technology promises to enable many uplink-oriented, latency-critical applications (LCAs) such as Augmented Reality and Connected Autonomous Vehicles. Nonetheless, recent measurement studies have largely focused on its downlink performance. In this work, we perform a systematic study of theuplinkperformance of commercial 5G mmWave networks across 3 major US cities and 2 mobile operators. Our study makes three contributions. (1) It reveals that 5G mmWave uplink performance is geographically diverse, substantially higher over LTE in terms of bandwidth and latency, but often erratic and suboptimal, which can degrade LCA performance. (2) Our analysis of control messages and PHY-level KPIs shows that the root causes for the suboptimal performance are fundamental to 5G mmWave and cannot be easily fixed via simple tuning of network configurations. (3) We identify various design and deployment optimizations that 5G operators can explore to bring 5G mmWave performance to the level needed to ultimately support the LCAs.