日本5G：Docomo，低于4.2G的低于6.5G的通信：运营商聚合
-速度达到“毫米波”水平-
NTT Docomo：
高通技术：
12月7日，我们启动了一项利用载波聚合（CA）技术的服务。
接收时使用低于6GHz频段的频率将“sub6”的5G通信加速到最大4.2Gbps
职业聚集：
载波聚合是一种允许同时使用多个频带进行数据通信的技术。
通过sub6的5G通信，
捆绑3.7GHz频段和4.5GHz频段，
接收期间最大达到4.2 Gbps。 </ s> </ s> </ s>
兼容的型号是
除了Xperia 5 II SO-52A
Galaxy Note20 Ultra 5G SC-53A（计划于12月），
Wi-Fi STATION SH-52A（计划在今年冬天之后提供支持）。
ITmedia新闻
https://www.itmedia.co.jp/news/articles/2012/07/news076.html
Qualcomm and NTT DOCOMO Enable World’s First Commercialization of 5G Sub-6 GHz Carrier Aggregation in Japan
Using DOCOMO’s new 5G network and select devices powered by the Qualcomm® SnapdragonTM 865 Mobile Platform with the Snapdragon X55 5G Modem-RF System,
customers
can now enjoy mobile download speeds of up to 4.2 Gbps – the fastest speeds available in Japan.
This level of service is achieved through 5G sub-6 GHz carrier aggregation,
which combines a 100 MHz carrier in band n78 and a 100 MHz carrier in band n79 to boost 5G performance and network capacity using DOCOMO’s diverse spectrum assets.
The deployment of 5G Sub6-CA, along with 5G mmWave 28 GHz band that
DOCOMO began operating commercially in September, will unleash the full potential of 5G and enable accelerated deployment of DOCOMO’s 5G service areas.
News & Notices | NTT DOCOMO
https://www.nttdocomo.co.jp/english/info/media_center/pr/2020/1207_00.html