公开(公告)号：US20200295851A1

公开(公告)日：2020-09-17

申请号：US16887644

申请日：2020-05-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Fan LUO ,  Feng LI ,  Yue LIU ,  Chaoyi YAN

IPC: H04B17/11 ,  H04B17/21

Abstract: This application provides a calibration method: receiving, by a control apparatus of an RRU, resource configuration information, where a time-frequency resource indicated by the resource configuration information is used to send and receive a calibration signal between the RRU and n other RRUs, the n other RRUs are RRUs in a calibration path topology, a quantity of hops of a calibration path between the RRU and each of the n other RRUs is 1; controlling, based on the resource configuration information, the RRU to send and receive a calibration signal on the time-frequency resource; obtaining m groups of path information based on the calibration signal; obtaining m calibration coefficients based on the in groups of path information; and compensating M channels of the RRU by using the in calibration coefficients.

公开(公告)号：US20190098519A1

公开(公告)日：2019-03-28

申请号：US16204514

申请日：2018-11-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Guochen LIU ,  Quanzhong GAO ,  Hui HUANG ,  Chaoyi YAN

IPC: H04W24/02 ,  H04W56/00

Abstract: Embodiments of the present invention provide a method and an apparatus for calibrating a channel between RRUs. The method includes: for each subcarrier in M subcarriers in full bandwidth, instructing, by a BBU, a reference RRU to transceive a calibration signal on the subcarrier by using a reference channel and a preset channel in a preset RRU, and calculating a calibration coefficient; and determining a first correspondence according to M calibration coefficients obtained by means of calculation, where the first correspondence includes a correspondence between a frequency of each subcarrier and the calibration coefficient on the subcarrier, 2≤M

公开(公告)号：US20220141750A1

公开(公告)日：2022-05-05

申请号：US17576240

申请日：2022-01-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jia LIU ,  Chaoyi YAN ,  Siduo SHEN

IPC: H04W36/30 ,  H04W36/00

Abstract: Embodiments of this application disclose a switching method and a related apparatus. When a terminal device has a switching requirement, to sift a target network device for the terminal device, a source network device receives N pieces of data channel quality information, where the N pieces of data channel quality information are in a one-to-one correspondence with N candidate network devices, and each of the N pieces of data channel quality information is used to indicate coverage quality of a data channel between the terminal device and a candidate network device corresponding to the data channel quality information.

公开(公告)号：US20210314110A1

公开(公告)日：2021-10-07

申请号：US17349524

申请日：2021-06-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Chaoyi YAN ,  Zezhou LUO

IPC: H04L5/00 ,  H04W72/04 ,  H04W72/12

Abstract: This application discloses a communication method for a carrier aggregation system. The carrier aggregation system is a carrier aggregation system including a TDD carrier and an FDD carrier, and method includes: A terminal device receives downlink information by using a secondary component carrier; and the terminal device sends feedback information for the downlink information by using a primary component carrier. When the primary component carrier or the secondary component carrier is a TDD carrier, at least one first subframe that includes P consecutive sTTIs exists in the TDD carrier, and at least one sTTI that occupies two OFDM symbols exists in the P sTTIs, where P is an integer greater than 1. Embodiments of the present disclosure further provide a corresponding terminal device and network device.

公开(公告)号：US20190281607A1

公开(公告)日：2019-09-12

申请号：US16423180

申请日：2019-05-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Quanzhong GAO ,  Chaoyi YAN ,  Chen WANG

IPC: H04W72/08 ,  H04W72/04 ,  H04L5/00

Abstract: A beamforming method and apparatus are disclosed, to expand coverage of a PDCCH in a particular direction, and improve demodulation performance of the PDCCH. Under this method, a cell-specific reference signal CRS wide beam can be combined by a base station with N CRS narrow beams to form N CRS composite beams. A first beam can be selected by the base station from the N CRS composite beams. Beamforming processing can be performed by the base station on a physical downlink control channel (PDCCH) based on a weight of the first beam to form a second beam. The first beam and the second beam can be sent.