Zhongguancun online news, recently under the guidance of the IMT-2020 (5G) promotion group of the Chinese Academy of Information and Communications Technology, Huawei completed all the functions and field performance test projects of the 5G millimeter wave base station, in the functional test, Huawei completed the single carrier 200MHz large bandwidth under the SA independent networking, the flexible frame structure of DDDSU and DSUUU, the CA carrier aggregation within the millimeter wave downlink 4×200MHz and the upstream 2×200MHz frequency band. Millimeter wave and 3.5GHz band of high and low frequency NR-CA and other test items, of which the DDDSU frame structure order user downlink peak rate of more than 7Gbps.
In September 2020, domestic operators, mainstream equipment manufacturers, and terminal manufacturers reached an agreement on millimeter wave single-carrier bandwidth application standards, requiring base stations and terminals to support 200MHz carrier bandwidth. It is reported that the high and low frequency NR-CA can simultaneously play the advantages of large millimeter wave bandwidth and good coverage of 3.5GHz, which can ensure a continuous and high-speed 4G experience, which is the mainstream technology direction of 5G high-low frequency coordination. On the one hand, it is closer to the signal processing of the RF side, and can sense the signal fluctuations in time, so that the base station can better do shunting and scheduling, and improve transmission efficiency. On the other hand, it can support both NSA and SA networking architectures, and the network architecture and evolution are very flexible.
It is reported that the high and low frequency NR-CA is conducive to the unification of architecture and shunt points, enabling the evolution of 5G networking in the full frequency band. Huawei completed the 5G high-low frequency NR-CA test this time, taking a solid step for the future large-scale commercial use of millimeter wave. In the field throughput performance test, the DDDSU frame structure is adopted, and the single-user peak rate of the 4×200MHz millimeter wave band is greater than 7Gbps, plus the total peak rate of the 3.5GHz band is 8.6Gbps, reaching the theoretical peak. Through MU-MIMO technology, the cell downlink peak rate of 4T4R base stations is greater than 12Gbps. Using the DSUU frame structure, the 4×200MHz millimeter wave band single-user downlink peak rate exceeds 2.7Gbps, plus the total peak rate of the 3.5GHz band exceeds 4Gbps, close to the theoretical peak.
(7832866)
![Samsung samples 24 Gbps GDDR6X video memory The next generation of flagship graphics cards will be installed[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)