公开(公告)号：US11211980B2

公开(公告)日：2021-12-28

申请号：US16812658

申请日：2020-03-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ye Wu ,  Huangping Jin ,  Wei Han ,  Xiaoyan Bi

IPC: H04B7/0456 ,  H04B7/0417 ,  H04B7/06 ,  H04L5/00

Abstract: This application provides a communication method, a communications apparatus, and a system. The method may include receiving, by a terminal device, a first group of precoded reference signals and a second group of precoded reference signals. The method may also include feeding back first indication information based on a channel state information (CSI) feedback-based transmission scheme, where the first indication information is used to determine a plurality of precoding vectors, at least one of the plurality of precoding vectors is determined by using the first group of precoded reference signals, and at least one of the plurality of precoding vectors is determined by using the second group of precoded reference signals.

公开(公告)号：US11184059B2

公开(公告)日：2021-11-23

申请号：US16746850

申请日：2020-01-18

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ye Wu ,  Huangping Jin ,  Wei Han ,  Xiaoyan Bi

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/0417 ,  H04B7/10

Abstract: This application provides a data transmission method and apparatus, and a system. The method includes: receiving, by a terminal device, a first group of precoded reference signals and a second group of precoded reference signals, where the first group of precoded reference signals includes at least one precoded reference signal, and the second group of precoded reference signals includes at least one precoded reference signal; and feeding back, by the terminal device, at least one piece of first indication information based on a transmission scheme that channel state information CSI feedback is based on, where the at least one piece of first indication information is used to determine a plurality of precoding vectors, at least one of the plurality of precoding vectors is a precoding vector corresponding to the at least one precoded reference signal in the first group of precoded reference signals, and at least one of the plurality of precoding vectors is a precoding vector corresponding to the at least one precoded reference signal in the second group of precoded reference signals.

公开(公告)号：US11165483B2

公开(公告)日：2021-11-02

申请号：US17171714

申请日：2021-02-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaohan Wang ,  Huangping Jin ,  Xiaoyan Bi

IPC: H04B7/02 ,  H04B7/06 ,  H04B7/0456 ,  H04B7/10

Abstract: A precoding matrix indicating and determining method, including determining a precoding matrix indicator (PMI) having R groups of space-frequency information corresponding to R transmission layers, where the R groups of space-frequency information are used to determine a precoding matrix of each subband, and an rth group of space-frequency information in the R groups indicates P×L space domain vectors corresponding to an rth transmission layer in the R transmission layers, K frequency domain vectors corresponding to the rth transmission layer, and P×L×K coefficients corresponding to the rth transmission layer, where each of the P×L×K coefficients indicates a linear superposition coefficient of a vector operation result of a P×L space domain vectors and one of the K frequency domain vectors, R is a quantity of transmission layers, P is a quantity of polarization directions, and R, r, P, L, and K are all positive integers, and sending the PMI.

公开(公告)号：US11089559B2

公开(公告)日：2021-08-10

申请号：US16256204

申请日：2019-01-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jin Liu ,  Lei Huang ,  Xiaoyan Bi ,  Huangping Jin

IPC: H04W56/00 ,  H04W72/02 ,  H04W48/16 ,  H04W72/04

Abstract: A synchronization processing method, including sending, in a first time unit, by a network device, a first synchronization signal having one or more first beams to a terminal device, and sending, in a second time unit, a second synchronization signal having one or more second beams to the terminal device. The first synchronization signal and the second synchronization signal cause the terminal device to determine, according to the first synchronization signal and the second synchronization signal, an optimal transmit beam of the network device for the terminal device from the one or more first beam and the one or more second beams, and further to determine a time sequence in which the optimal transmit beam is located. A time offset corresponding to each first beam and second beams is different, and is a difference between a time sequence of the beams and a time sequence of the second beams.

公开(公告)号：US11063640B2

公开(公告)日：2021-07-13

申请号：US16459581

申请日：2019-07-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping Jin ,  Wei Han ,  Xiaoyan Bi ,  Peng Shang

IPC: H04B7/0456 ,  H04B7/06

Abstract: Embodiments of the present invention provide a precoding vector indicating method, a precoding vector determining method, a receive end device, and a transmit end device. The precoding vector indicating method includes: determining a plurality of component vectors of an ideal precoding vector and a weight of each component vector based on at least one basic codebook, where each component vector is a column vector of one of the at least one basic codebook; and sending a precoding vector indicator, where the precoding vector indicator is used to indicate the plurality of component vectors and the weight of each component vector. The embodiments of the present invention further provide a precoding vector determining method, a receive end device, and a transmit end device. In the technical solutions provided in the embodiments of the present invention, a basic codebook is constructed based on a plurality of parameters, so that the basic codebook can be used to more accurately describe a channel environment. In this way, a precoding vector determined based on the basic codebook provided in the embodiments of the present invention can more accurately match a channel, thereby improving a precoding effect.

公开(公告)号：US11012130B2

公开(公告)日：2021-05-18

申请号：US16684219

申请日：2019-11-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shibin Ge ,  Wei Han ,  Xiaoyan Bi ,  Hongzhe Shi ,  Ye Wu ,  Huangping Jin

IPC: H04B7/0456 ,  H04B7/06 ,  H04W80/02

Abstract: This application provides a technical solution for rank indication, and especially when a CQI number is not configured or a CQI number is 1, a network device configures a rank indication restriction parameter as that at least one of ranks whose index numbers are 0, 1, 2, and 3 is allowed to be reported by the terminal device; or even if the network device does not perform the foregoing configuration, and none of the ranks whose index numbers are 0, 1, 2, and 3 is allowed to be reported, the terminal device may select at least one rank for RI reporting, so as to resolve a problem that a system cannot work. In addition, according to embodiments of this application, bit overheads required for RI reporting may further be reduced.

公开(公告)号：US10756793B2

公开(公告)日：2020-08-25

申请号：US16503598

申请日：2019-07-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping Jin ,  Wei Han ,  Xiaoyan Bi ,  Peng Shang

IPC: H04B7/04 ,  H04B7/0456 ,  H04L25/03

Abstract: Embodiments can provide a precoding matrix indicating method, a precoding matrix determining method, a receive end device, and a transmit end device. In the precoding matrix indicating method, component matrices of an ideal precoding matrix and a weight of each component matrix can be determined based on at least one basic codebook. A dimension of each component matrix is the same as a dimension of the ideal precoding matrix, and a column vector of each component matrix is selected from column vectors of one of the at least one basic codebook. A precoding matrix indicator can be sent. The precoding matrix indicator can indicate the component matrices and the weight of each component matrix. With this, an ideal precoding matrix is approximately represented in a form of a weighted sum of a plurality of component matrices so that feedback overheads caused by feeding back a precoding matrix can be reduced.

公开(公告)号：US12224822B2

公开(公告)日：2025-02-11

申请号：US18502785

申请日：2023-11-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaohan Wang ,  Huangping Jin ,  Xiaoyan Bi

IPC: H04B7/0456 ,  H04B7/06 ,  H04L5/00

Abstract: This disclosure provides methods and apparatuses for precoding in wireless communications. In an implementation, a method includes: receiving, from a terminal device, first indication information, wherein the first indication information indicates L1 space domain vectors in a space domain vector set, K1 frequency domain vectors in a frequency domain vector set, and T1 space-frequency component matrices, wherein a precoding vector of one or more frequency domain units is determined by a weighted sum of the T1 space-frequency component matrices, wherein the L1 space domain vectors and the K1 frequency domain vectors correspond to M1 space-frequency component matrices that comprise the T1 space-frequency component matrices, and determining the precoding vector of the one or more frequency domain units based on the first indication information.

公开(公告)号：US12206472B2

公开(公告)日：2025-01-21

申请号：US18155205

申请日：2023-01-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping Jin ,  Zhimeng Zhong ,  Haifan Yin ,  Xiaoyan Bi

IPC: H04B7/0456 ,  H04B7/0413 ,  H04W72/23

Abstract: A channel measurement method and a communications apparatus. The method includes: a terminal device receives precoded reference signals from a network device, where the precoded reference signals are obtained by precoding reference signals based on K angle vectors; and generates and sends first indication information, where the first indication information is used to indicate P weighting coefficients corresponding to P angle-delay pairs, the P weighting coefficients are determined based on the precoded reference signals, each of the P angle-delay pairs includes one angle vector and one delay vector corresponding to the angle vector, a delay vector corresponding to each angle vector is preconfigured, each angle vector and the delay vector corresponding to each angle vector are obtained through uplink channel measurement, and the P angle-delay pairs and the P weighting coefficients corresponding to the P angle-delay pairs are used to determine a precoding matrix.

公开(公告)号：US12166552B2

公开(公告)日：2024-12-10

申请号：US17681281

申请日：2022-02-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang Ren ,  Shibin Ge ,  Huangping Jin ,  Xiaohan Wang ,  Peng Shang

IPC: H04B7/06 ,  H04B7/0413

Abstract: This application provides example channel measurement methods and example communication apparatuses. One example method includes determining L weighting coefficients for determining channels of K moments based on channels of M moments, where L, M, and K are all positive integers. Information about the L weighting coefficients can then be sent.