公开(公告)号：US20210194547A1

公开(公告)日：2021-06-24

申请号：US17176529

申请日：2021-02-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Xiaohan WANG ,  Haifan YIN ,  Peng SHANG ,  Xiaoyan BI

IPC: H04B7/0456

Abstract: This application provides methods and apparatuses for precoding vector indication and determination. One method includes: generating, by a first communications device, first indication information that indicates one or more port selection vectors, one or more frequency domain vectors, and one or more linear combination coefficients, wherein each of the one or more linear combination coefficients corresponds to a port selection vector and a frequency domain vector, each of the one or more port selection vectors indicates a port of a precoded reference signal, and each of the one or more frequency domain vectors indicates a variation pattern of a channel in a frequency domain; and sending the first indication information to a second communications device.

公开(公告)号：US20200067588A1

公开(公告)日：2020-02-27

申请号：US16673395

申请日：2019-11-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Wei HAN ,  Peng SHANG ,  Peng JIANG

IPC: H04B7/06 ,  H04B7/0456

Abstract: This application describes a data transmission method, a terminal device, and a network device. The method may include determining, by a terminal device, a reporting type of channel state information (CSI), where the reporting type is used to indicate a relationship between CSI of a beam that is currently reported by the terminal device and CSI of a beam that is previously reported by the terminal device in a current reporting period. The method may also include sending, by the terminal device, CSI of N beams to a network device based on a reporting type and a codebook parameter, where the codebook parameter is used to indicate a quantity N of the currently reported beams, and N is an integer greater than or equal to 1. According to the data transmission method, the terminal device, and the network device described in the embodiments of this application, CSI reporting flexibility can be improved, thereby improving system performance.

公开(公告)号：US20190334594A1

公开(公告)日：2019-10-31

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: H04B7/0456 ,  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：US20190115960A1

公开(公告)日：2019-04-18

申请号：US16205336

申请日：2018-11-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Peng JIANG ,  Huangping JIN ,  Wei HAN ,  Peng SHANG

IPC: H04B7/0456

Abstract: This application disclose a method for indicating and determining a precoding vector related to precoding technologies to increase an overall system performance gain. The method may include: generating indication information, and sending the indication information. The indication information is used to indicate a plurality of component vectors of a precoding vector and a combination coefficient of each component vector. The combination coefficient of the component vector includes at least one of the following types: a wideband amplitude coefficient, a narrowband amplitude coefficient, and a narrowband phase coefficient.

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：US20190081682A1

公开(公告)日：2019-03-14

申请号：US16188791

申请日：2018-11-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lu WU ,  Wei HAN ,  Peng SHANG ,  Jin LIU ,  Xiaoyan BI ,  Shibin GE ,  Dageng CHEN

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

CPC classification number: H04B7/0626 ,  H04B7/0478 ,  H04B7/0482 ,  H04B7/0617 ,  H04B7/065 ,  H04L5/0048

Abstract: A radio access node (RAN) and method of operation of the RAN are provided. The RAN includes a massive multiple-input-multiple-output (MIMO) antenna array. The RAN includes a processing hardware configured to carry out a communication method that includes receiving a digital data stream for transmission on a time-frequency resource. The RAN precodes the digital data stream using a digital beamforming stage to render a precoded digital downlink data stream for downlink data stream signal transmission to a user equipment. The digital beamforming stage includes a first precoding stage configured according to a long-term matrix, and a second precoding stage configured according to a short-term matrix. The RAN is further configured to generate a downlink data stream transmission signal to the user equipment in accordance with the precoded digital downlink data stream.

公开(公告)号：US20220182122A1

公开(公告)日：2022-06-09

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.

公开(公告)号：US20200014435A1

公开(公告)日：2020-01-09

申请号：US16576594

申请日：2019-09-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Peng JIANG ,  Huangping JIN ,  Wei HAN ,  Peng SHANG

IPC: H04B7/0456

Abstract: This application disclose a method for indicating and determining a precoding vector related to precoding technologies to increase an overall system performance gain. The method may include: generating indication information, and sending the indication information. The indication information is used to indicate a plurality of component vectors of a precoding vector and a combination coefficient of each component vector. The combination coefficient of the component vector includes at least one of the following types: a wideband amplitude coefficient, a narrowband amplitude coefficient, and a narrowband phase coefficient.

公开(公告)号：US20190165843A1

公开(公告)日：2019-05-30

申请号：US16263984

申请日：2019-01-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Peng SHANG ,  Lu WU ,  Xiaoyan BI

IPC: H04B7/06 ,  H04W72/04 ,  H04W24/10 ,  H04W16/28

Abstract: The present invention discloses an inter-base station beam configuration and management method, a base station, user equipment, and a system. The method includes: receiving, by user equipment, a beam signal sent by a base station; determining, by the user equipment, a receive beam based on the sent beam signal; receiving, by the base station, a beam signal sent by a terminal device; determining, by the base station, a receive beam based on the sent beam signal; performing dynamic selection and fast beam switching between base stations in combination with a coordinated multi-point technology; and performing fast beam alignment between the base station end with the user equipment end. This application can effectively implement fast beam switching and alignment between base stations and support dynamic base station selection, thereby improving link reliability.

公开(公告)号：US20190081680A1

公开(公告)日：2019-03-14

申请号：US16185383

申请日：2018-11-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lu WU ,  Xiaoyan BI ,  Peng SHANG

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

Abstract: The present disclosure discloses a channel state information feedback method, a base station, a terminal device, and a system. The method includes: receiving, by a terminal device, a reference signal sent by a base station; determining, by the terminal device, channel state information based on the reference signal; and sending, by the terminal device, the channel state information to the base station, so that the base station determines a precoding matrix F. The precoding matrix F=C1C2W, where C1 is a first-level precoding matrix, C2 is a second-level precoding matrix, and W is a third-level precoding matrix. Channel state information corresponding to C1 includes beam information, channel state information corresponding to C2 includes long-term wideband channel information, and channel state information corresponding to W includes instantaneous channel information. This patent application can reduce total pilot and CSI feedback overheads, thereby improving a system throughput.