Huawei completed all tests of 5G millimeter wave base stations

IT Home December 21 news, recently, under the guidance of the IMT-2020 (5G) Promotion Group of the China Academy of Information and Communications Technology, Huawei completed all the functions and field performance test projects of 5G millimeter wave base stations, and the DDDSU frame structure ordered the peak rate of users to drop more than 7Gbps. This will lay a solid foundation for millimeter wave to continue to unleash the potential of 5G technology and enable 5.5G evolution and development.

IT Home learned that in the functional test, Huawei completed the single carrier 200MHz large bandwidth under the stand Alone networking (SA), the flexible frame structure of DDDSU and DSUUU, the CA (Carrier Aggregation, carrier aggregation) in the millimeter wave downstream 4*200MHz and upstream 2*200MHz bands, and the high-low and low-frequency NR-CA test projects in the millimeter wave and 3.5GHz bands.

The large bandwidth of 200MHz per carrier greatly increases the UE peak rate and maximizes the benefits of millimeter wave. In September 2020, under the guidance of the IMT-2020 (5G) Promotion Group, domestic operators, mainstream equipment manufacturers and terminal manufacturers reached an agreement on millimeter wave single-carrier bandwidth application standards: base stations and terminals must support 200MHz carrier bandwidth. This year, under the organization of the promotion group, Huawei completed a single-carrier 200MHz large bandwidth test, which fully demonstrated the value of millimeter wave large bandwidth.

High and low frequency NR-CA can simultaneously play the advantages of large millimeter wave bandwidth and good coverage of 3.5GHz, thereby ensuring the continuous high-speed experience of 5G users, which is the mainstream technology direction of 5G high-low frequency coordination. On the one hand, NR-CA technology is closer to the signal processing of the RF side, and can sense signal fluctuations in time, so that the base station can better do shunting and scheduling, and improve transmission efficiency. On the other hand, the technology can support both NSA and SA networking architectures, and the network architecture and evolution are very flexible. Furthermore, considering that the basis of CA technology has been adopted between sub6G bands, high and low frequency NR-CA is conducive to the unification of architecture and shunt points, enabling the evolution of full-band 5G networking. Huawei and industry partners have completed the world's first 5G high-low frequency NR-CA test, taking a solid step for the future large-scale commercial use of millimeter wave.

In the field throughput performance test, the throughput rate is close to the theoretical peak. Using the DDDSU frame structure, the peak downstream rate of a single user in the millimeter wave band is greater than 7Gbps, and the peak rate of cell descent is greater than 12Gbps. Using the DSUUU frame structure, the uplink peak rate of a single user in the millimeter wave band is greater than 2Gbps, and the uplink peak rate of the cell is greater than 7.5Gbps, and the upstream capability is greatly improved. This will enable the rapid development of uplink Centric Broadband Communication services in the future 5.5G, such as machine vision.