Real-Time Deployment Aspects of C-Band and Millimeter-Wave 5G-NR Systems
Real-Time Deployment Aspects of C-Band and Millimeter-Wave 5G-NR Systems
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DOI：
10.1109/icc40277.2020.9148902
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发表时间：
2020-01
期刊：
影响因子：
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通讯作者：
M. Shafi;H. Tataria;A. Molisch;F. Tufvesson;G. Tunnicliffe
中科院分区：
文献类型：
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作者：
M. Shafi;H. Tataria;A. Molisch;F. Tufvesson;G. Tunnicliffe
第五代（5G）新无线电（NR）部署正在c频段（3.3 - 5.0 GHz）和毫米波（mmWave）频段（24.5 - 29.5 GHz）中推出。对于室外场景，c波段有望提供广域覆盖和吞吐量均匀性，而毫米波频段有望为c波段覆盖范围内的专用区域提供超高吞吐量。由于频段的差异，两种系统都被设计成不同的发射和接收参数，自然导致性能变化与所选参数成正比。与之前的许多工作不同，本文介绍了在新西兰奥克兰市中心进行的测量评估，该评估来自两个频段运行的单用户单蜂窝5G-NR系统的预商用部署。通过基带和模拟波束形成分析了两个频段的净吞吐量、覆盖可靠性和信道等级。我们的结果表明，c波段的覆盖范围比毫米波要好得多，具有一贯较高的信道等级。在此基础上，对光束方位偏离角的空间平稳区域进行了表征，并建立了基于测量光束身份的空间平稳区域模型。方位角od的SSR与伽马分布密切相关。
Fifth-generation (5G) new radio (NR) deployments are being rolled out in both the C–band (3.3 - 5.0 GHz) and millimeter-wave (mmWave) band (24.5 - 29.5 GHz). For outdoor scenarios, the C–band is expected to provide wide area coverage and throughput uniformity, whereas the mmWave band is expected to provide ultra-high throughput to dedicated areas within the C-band coverage. Due to the differences in the frequency bands, both systems are expected to be designed with different transmit and receive parameters, naturally resulting in performance variations proportional to the chosen parameters. Unlike many previous works, this paper presents measurement evaluations in central Auckland, New Zealand, from a pre-commercial deployment of a single-user, single-cell 5G-NR system operating in both bands. The net throughput, coverage reliability, and channel rank are analyzed across the two bands with baseband and analog beamforming. Our results show that the C-band coverage is considerably better than mmWave, with a consistently higher channel rank. Furthermore, the spatial stationarity region (SSR) for the azimuth angles-of-departure (AODs) is characterized, and a model derived from the measured beam identities is presented. The SSR of azimuth AODs is seen to closely follow a gamma distribution.