公开(公告)号：US20220014251A1

公开(公告)日：2022-01-13

申请号：US17486536

申请日：2021-09-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaohan WANG ,  Yongping ZHANG ,  Huangping JIN ,  Xiang GAO ,  Xiaoyan BI

IPC: H04B7/06 ,  H04B7/0417

Abstract: Embodiments of this application provide a communication method and a communications apparatus. The method includes: determining a plurality of frequency domain units on which reporting of a PMI is based in reporting bandwidth. The plurality of frequency domain units include one or more first frequency domain units and third frequency domain units obtained by dividing one or more second frequency domain units. A granularity of the first frequency domain unit is less than a preconfigured first granularity, a granularity of the second frequency domain unit is a first granularity, and a granularity of the third frequency domain unit is a predetermined second granularity. The first granularity is a granularity preconfigured for reporting a CQI, a second granularity is a granularity predetermined for reporting the PMI, and the second granularity is less than the first granularity.

公开(公告)号：US20210175936A1

公开(公告)日：2021-06-10

申请号：US17157318

申请日：2021-01-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Xiaohan WANG ,  Xiaoyan BI

IPC: H04B7/0417 ,  H04L25/02 ,  H04B7/0456 ,  H04B7/06

Abstract: Embodiments of this application disclose a channel estimation method and apparatus, and relate to the field of communications technologies. The method may include: generating and sending indication information, where the indication information is used to indicate L space-frequency basis vectors for constructing an M×N-dimensional space-frequency vector; the space-frequency vector includes M N-dimensional precoding vectors, each precoding vector is used in one of M frequency bands, and the space-frequency vector is generated by performing a weighted combination on L space-frequency component vectors; each of the L space-frequency component vectors is a vector including M×N elements that are in one of the L space-frequency basis vectors, and each of the L space-frequency basis vectors is an Nf×N-dimensional vector; the space-frequency basis vector is a three-dimensional oversampled (DFT) vector; and L≥2, Nf≥M≥1, N≥2, and L, M, N, and Nf are all integers.

公开(公告)号：US20250141520A1

公开(公告)日：2025-05-01

申请号：US19008897

申请日：2025-01-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ting LI ,  Xiaohan WANG ,  Huangping JIN

IPC: H04B7/06 ,  H04W76/38

Abstract: This application provides a channel state information (CSI) feedback method, a terminal device, and an access network device. The method includes: The terminal device sends first CSI to the access network device, where the first CSI includes indication information of a first basis of statistical eigen subspace, and a period for sending the first CSI is a first period. The terminal device sends second CSI to the access network device, where the second CSI includes indication information of a first linear combination coefficient, and a period for sending the second CSI is a second period. The terminal device updates a second basis to the first basis based on trigger information. The terminal device sends third CSI to the access network device, where the third CSI includes indication information of a second linear combination coefficient, and the third CSI is generated based on the updated second basis.

公开(公告)号：US20240056139A1

公开(公告)日：2024-02-15

申请号：US18496386

申请日：2023-10-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shibin GE ,  Zhenyuan CHEN ,  Xiaohan WANG ,  Yichuan YU ,  Jiyong PANG ,  Hua CAI

IPC: H04B7/0456 ,  H04W72/231

CPC classification number: H04B7/0456 ,  H04W72/231

Abstract: This application discloses communication methods and communication apparatuses. In an implementation, a communication method includes: receiving first information that indicates first group configuration information and second group configuration information, the first group configuration information indicates a correspondence between P reference signal ports and Z layers, and the second group configuration information indicates a correspondence between N frequency domain base vectors and the Z layers; and sending a precoding matrix indicator (PMI) corresponding to the Z layers, where the PMI is determined based on the first information.

公开(公告)号：US20220416866A1

公开(公告)日：2022-12-29

申请号：US17887209

申请日：2022-08-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shibin GE ,  Huangping JIN ,  Xiaohan WANG ,  Yiling YUAN ,  Xiaoyan BI

IPC: H04B7/06 ,  H04B7/0456

Abstract: A channel state information feedback method includes: a terminal receives first indication information from a network device, and the terminal sends channel state information to the network device. The first indication information is used to indicate a type of a right multiplication matrix in a first codebook, and the first codebook satisfies a formula (I). W is the first codebook, W1 is a port selection matrix, (II) is a linear superposition coefficient matrix, Wf is the right multiplication matrix, and (III) is a conjugate transpose of Wf, and is used by the terminal to determine the channel state information based on the first codebook. According to the method, when there are a plurality of codebooks, the codebook used by the terminal to obtain the CSI can be clearly indicated.

公开(公告)号：US20220021425A1

公开(公告)日：2022-01-20

申请号：US17486478

申请日：2021-09-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaohan WANG ,  Huangping JIN ,  Xiaoyan BI

IPC: H04B7/0456 ,  H04L25/02

Abstract: This application discloses a channel estimation method and apparatus, and relates to the field of communications technologies, to help reduce indication overheads. The method may include: generating and sending indication information. The indication information is used to indicate K N-dimensional spatial-domain component vectors, L M-dimensional frequency-domain component vectors, and a weight matrix, to indicate to construct an M×N-dimensional spatial-frequency matrix, or an M×N or N×M spatial-frequency matrix.

公开(公告)号：US20220014241A1

公开(公告)日：2022-01-13

申请号：US17483419

申请日：2021-09-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaohan WANG ,  Huangping JIN ,  Xiang REN ,  Wei HAN ,  Xiaoyan BI

IPC: H04B7/0456 ,  H04L25/02

Abstract: Embodiments of this application disclose a channel estimation method and apparatus, and relate to the field of communications technologies, to help reduce indication overheads. The method may include: generating and sending indication information, where the indication information is used to indicate M N-dimensional precoding vectors, each precoding vector is applied to one of M frequency bands, the M N-dimensional precoding vectors form a space-frequency matrix, and the space-frequency matrix is generated by performing weighted combination on a plurality of space-frequency component matrices, where the space-frequency matrix is an M×N-dimensional space-frequency vector or an X×Y space-frequency matrix, X and Y are one and the other of M and N, M≥1, N≥2, and both M and N are integers.

公开(公告)号：US20210337572A1

公开(公告)日：2021-10-28

申请号：US17371300

申请日：2021-07-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Liuliu JI ,  Shibin GE ,  Haicun HANG ,  Xiaohan WANG ,  Xiaoyan BI ,  Hongzhe SHI

IPC: H04W72/12 ,  H04W72/04

Abstract: This application provides a data transmission method and a communication apparatus, to improve data transmission reliability. The method includes: receiving downlink control information (DCI); determining a plurality of pieces of quasi-co-location (QCL) information based on the DCI; and receiving downlink data based on the plurality of pieces of QCL information. The plurality of pieces of QCL information correspond to a plurality of time domain units, each time domain unit corresponds to at least one piece of QCL information, and at least two of the plurality of pieces of QCL information are different, that is, the downlink data is from at least two network devices.

公开(公告)号：US20210336665A1

公开(公告)日：2021-10-28

申请号：US17369513

申请日：2021-07-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Xiaohan WANG ,  Xiaoyan BI

IPC: H04B7/0456

Abstract: The present disclosure relates to precoding vector indicating and determining methods and communications apparatus. In one example method, a terminal device generates first indication information, and sends the first indication information to a network device. The first indication information is used to indicate one or more frequency domain vectors and one or more weighting coefficients, where the one or more frequency domain vectors include a frequency domain vector reported for each of R frequency domain unit groups, the one or more weighting coefficients include a weighting coefficient reported for each of the R frequency domain unit groups, and a frequency domain vector and a weighting coefficient that are reported for an rth frequency domain unit group in the R frequency domain unit groups are used to construct a precoding vector corresponding to one or more frequency domain units in the rth frequency domain unit group.

公开(公告)号：US20210259003A1

公开(公告)日：2021-08-19

申请号：US17246236

申请日：2021-04-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haicun HANG ,  Shibin GE ,  Xiaohan WANG ,  Liuliu JI

IPC: H04W72/12

Abstract: This application provides a data sending and receiving method. The method includes: receiving, by a terminal device, a first PDCCH and a second PDCCH, where the first PDCCH is used to schedule a first PDSCH, and the first PDSCH is used to transmit first data; determining, based on the first PDCCH and the second PDCCH, a first resource used to transmit the first data, where the first resource is a part or all of a resource of the first PDSCH; and receiving, by the terminal device, the first data from a network device on the first resource. The first resource is determined with reference to the first PDCCH and the second PDCCH, to avoid a problem that receiving performance of the first PDSCH and the second PDCCH may deteriorate when a resource of the second PDCCH overlaps the resource of the first PDSCH.