公开(公告)号：US20190326962A1

公开(公告)日：2019-10-24

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：US20240356592A1

公开(公告)日：2024-10-24

申请号：US18758877

申请日：2024-06-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jun XU ,  Hanqing WANG ,  Xiaoyu ZHANG ,  Jiyong PANG ,  Huangping JIN

IPC: H04B7/0456 ,  H04W72/1268 ,  H04W72/232

CPC classification number: H04B7/0456 ,  H04W72/1268 ,  H04W72/232

Abstract: Example precoding indication manner determining methods and apparatus are described. One example method includes: A radio access network (RAN) device obtains information about an uplink channel of a terminal device. The RAN device determines a scheduled uplink bandwidth and a quantity of uplink data flows of the terminal device based on the information about the uplink channel of the terminal device. Then, the RAN device determines an uplink precoding indication manner of the terminal device based on the scheduled uplink bandwidth and the quantity of uplink data flows of the terminal device. The RAN device sends first information to the terminal device, where the first information indicates the uplink precoding indication manner.

公开(公告)号：US20240313843A1

公开(公告)日：2024-09-19

申请号：US18671506

申请日：2024-05-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang REN ,  Xiaoyan BI ,  Huangping JIN

IPC: H04B7/06 ,  H04B7/0456 ,  H04L5/00 ,  H04L25/02 ,  H04W72/23 ,  H04W72/563

CPC classification number: H04B7/0639 ,  H04B7/0456 ,  H04L5/0051 ,  H04L25/0226 ,  H04W72/23 ,  H04W72/563

Abstract: Embodiments of this application relate to the field of communications technologies, and disclose a precoding matrix configuration method and apparatus, to help improve performance of decoding data. The method, applied to uplink communication, includes generating first configuration information to configure M precoding matrices, where M is an integer that is equal to or bigger than 2. The method further includes transmitting, to a terminal device, the first configuration information. In response to the uplink transmission is non-codebook-based uplink transmission, the first configuration information comprises first indication information indicating M sounding reference signal resource indicators (SRIs), and where the M SRIs are used to configure the M precoding matrices. In response to the uplink transmission is codebook-based uplink transmission, the first configuration information comprises second indication information indicating M transmit precoding matrix indicators (TPMIs), and where the M TPMIs are used to configure the M precoding matrices.

公开(公告)号：US20220416858A1

公开(公告)日：2022-12-29

申请号：US17900501

申请日：2022-08-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaohan WANG ,  Huangping JIN ,  Xiaoyan BI

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

Abstract: This application discloses methods and apparatuses for determining precoding vector. One example method includes: determining, by a network apparatus, a precoding vector of one or more frequency domain units based on the first indication information. The first indication information is used to indicate L1 beam vectors in a beam vector set, K1 frequency domain vectors in a frequency domain vector set, and T1 space-frequency component matrices. A weighted sum of the T1 space-frequency component matrices is used to determine a precoding vector of each frequency domain unit. The T1 space-frequency component matrices are selected from M1 space-frequency component matrices corresponding to the L1 beam vectors and the K1 frequency domain vectors, each space-frequency component matrix is uniquely determined by one beam vector and one frequency domain vector.

公开(公告)号：US20220385339A1

公开(公告)日：2022-12-01

申请号：US17873393

申请日：2022-07-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Xiaohan WANG ,  Xiaoyan BI

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

Abstract: Embodiments of this application disclose a channel estimation method and apparatus, and relate to the field of communications technologies. One example method 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：US20220353725A1

公开(公告)日：2022-11-03

申请号：US17862463

申请日：2022-07-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Shi JIN ,  Yong LIU ,  Xiaoyan BI

IPC: H04W24/10 ,  H04W28/06

Abstract: A channel measurement method includes a network device obtains first information and obtains third downlink channel information based on the first information. The first information is obtained based on second information and third information, the second information is obtained based on first downlink channel information obtained by a terminal device through measurement, and the third information is obtained based on uplink channel information and/or second downlink channel information obtained by the terminal device through measurement. The network device considers auxiliary information in a process of reconstructing downlink channel information, so that precision of the reconstructed channel information is improved.

公开(公告)号：US20220271900A1

公开(公告)日：2022-08-25

申请号：US17730905

申请日：2022-04-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yong LIU ,  Shibin GE ,  Huangping JIN

IPC: H04L5/00

Abstract: Example methods and apparatus for configuring a transmit port of a downlink reference signal are described. One example method includes indicating configurations corresponding to a plurality of transmit ports to a terminal device by a network device by using first indication information. Each transmit port may be associated with one piece of delay information, transmit ports associated with same delay information correspond to a same configuration, and at least two transmit ports associated with different delay information correspond to different configurations. The terminal device may receive, based on a configuration corresponding to each transmit port, downlink reference signals sent by the plurality of transmit ports.

公开(公告)号：US20220123798A1

公开(公告)日：2022-04-21

申请号：US17361708

申请日：2021-06-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Xiaohan WANG ,  Xiaoyan BI

IPC: H04B7/0456 ,  H04B7/06

Abstract: This application provides a method for indicating vectors used to construct a precoding vector and a communications apparatus. The method includes: generating a CSI report; and transmitting the CSI report to a network device. The CSI report is used to indicate a quantity of space-frequency vector pairs reported for R transport layers, and indication overheads of the quantity of space-frequency vector pairs are irrelevant to a quantity R of the transport layers. Through fixing of the indication overheads, the indication of the quantity of space-frequency vector pairs reported for the R transport layers may be designed in a first part of the CSI report, so that the network device decodes the first part based on a determined length. The network device may determine overheads of a second part based on information in the first part, to decode the second part and obtain information in the CSI report.

公开(公告)号：US20210250076A1

公开(公告)日：2021-08-12

申请号：US17241165

申请日：2021-04-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Xiaohan WANG ,  Xiaoyan BI

IPC: H04B7/06 ,  H04L1/16

Abstract: Example precoding vector indication methods, precoding vector determining methods, and communications apparatus to reduce feedback overheads are described. One example method includes generating and sending a channel state information (CSI) report by a terminal device. A network device determines a precoding vector of one or more frequency domain units based on the CSI report. The CSI report is used to indicate M space-frequency units and a weighting coefficient of a part or all of the M space-frequency units, each of the M space-frequency units corresponds to one beam vector and one frequency domain vector, and a weighted sum of the part or all of the M space-frequency units is used to determine the precoding vector of the one or more frequency domain units.

公开(公告)号：US20210234595A1

公开(公告)日：2021-07-29

申请号：US17213404

申请日：2021-03-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yongping ZHANG ,  Baojin LI ,  Huangping JIN ,  Tie LI

IPC: H04B7/06 ,  H04B7/0417 ,  H04W72/04

Abstract: This application relates to channel state information (CSI) feedback methods and devices. One method comprises: receiving, by a terminal device from a network device, indication information of a channel state information (CSI) reporting band; determining, by the terminal device, based on the indication information, a subset of subbands in a bandwidth part configured for the terminal device for CSI reporting; determining, by the terminal device. CSI reporting priorities of the subset of the subbands based on index numbers of the subset of the subbands, wherein the index numbers of the subset of the subbands are numbered in an ascending numerical order; and sending, by the terminal device to the network device, CSI of M subbands with higher CSI reporting priorities in the subset of the subbands compared to a remainder of subbands in the subset of subbands.