公开(公告)号：US20210105123A1

公开(公告)日：2021-04-08

申请号：US17127486

申请日：2020-12-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yajun LUO ,  Xun LI ,  Chaofeng WEI ,  Zhen HUANGFU

IPC: H04L5/00 ,  H04B7/06 ,  H04W24/10

Abstract: Embodiments provide a CSI-RS sending method and device, and a base station. The CSI-RS sending method includes: receiving capability indication information of each user equipment UE in a cell; determining N transmission schemes based on the capability indication information; configuring CSI-RS resources to be multiplexed by CSI-RSs corresponding to the N transmission schemes; and sending, to corresponding UE based on each of the N transmission schemes, a CSI-RS that is carried on the CSI-RS resource and that corresponds to the corresponding transmission scheme. It can be learned that according to the technical solutions in the embodiments of this application, when resources are limited, CSI-RSs corresponding to different transmission schemes are sent in a resource multiplexing manner, so that a plurality of transmission schemes can be compatible, and resource utilization can be improved.

公开(公告)号：US20190141649A1

公开(公告)日：2019-05-09

申请号：US16220563

申请日：2018-12-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jun HU ,  Haibing CAO ,  Yajun LUO

IPC: H04W56/00 ,  H04W84/10 ,  H04W72/04

Abstract: Embodiments of the present disclosure relate to the communications field, and in particular, to frequency synchronization of base stations. In an example frequency synchronization method, a first base station obtains a second frequency offset of a second base station. The first base station then determines a frequency difference between the first base station and the second base station and a first frequency offset of the first base station based on the second frequency offset and the frequency difference. The first base station then performs frequency synchronization based on the first frequency offset. In some instances, the first base station can determine, through interaction between the first base station and the second base station, the first frequency offset of the first base station without depending on a synchronous Ethernet to perform frequency synchronization.