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：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：US20220014299A1

公开(公告)日：2022-01-13

申请号：US17487397

申请日：2021-09-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Liuliu JI ,  Hongzhe SHI ,  Haicun HANG ,  Min ZHANG ,  Xiaohan WANG ,  Xiaoyan BI

IPC: H04J13/00 ,  H04W72/04 ,  H04L5/00

Abstract: Embodiments of this application provide a downlink control information transmission method, an apparatus, and a system, so that after receiving one piece of DCI, the terminal device learns whether blind detection of DCI needs to be continued. The method includes: A terminal device receives first DCI, where the first DCI includes first indication information, and the first indication information is used to indicate a first antenna port. The terminal device assumes, based on the first antenna port and antenna port configuration information, whether second DCI exists. The configuration information may include an index of a CDM group to which each of a plurality of antenna ports belongs and a maximum quantity of CDM groups that is supported by the terminal device; or the configuration information may include one or more antenna port groups, and each of the one or more antenna port groups includes one or more antenna ports.

公开(公告)号：US20210377923A1

公开(公告)日：2021-12-02

申请号：US17401503

申请日：2021-08-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04W72/04 ,  H04W72/12 ,  H04W8/24

Abstract: This application provides a multi-downlink control information based transmission technology, in which a terminal reports information about a capability of the terminal to support multi-DCI transmission, or a network device sends indication information of types or a quantity of multi-DCI based transmissions to a terminal, and the network device performs resource scheduling on the terminal on this basis, thereby helping improve resource scheduling efficiency and reduce processing complexity of the terminal. In addition, this application also provides a corresponding solution for a scenario in which a CA/DC based transmission scenario coexists with multi-DCI based transmission, thereby helping the terminal share a multi-DCI based transmission capability and a CA/DC based transmission capability, and improve a processing capability of the terminal.

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：US20250039914A1

公开(公告)日：2025-01-30

申请号：US18788902

申请日：2024-07-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yongping ZHANG ,  Baojin LI ,  Xiaohan WANG ,  Huangping JIN

IPC: H04W72/54 ,  H04B7/06 ,  H04W72/0453 ,  H04W72/23

Abstract: This application provides a method for reporting a terminal device capability and a communications apparatus. The method includes: The 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 parameters and one or more of the following capability parameters associated with each frequency domain parameter: a port quantity, a spatial domain parameter, a reference signal resource quantity, and a total port quantity. The frequency domain parameter is used to indicate a maximum quantity of frequency domain units that can be supported by the terminal device. The frequency domain unit is a frequency domain unit based on which the terminal device feeds back a PMI. Each capability parameter group may be used to indicate one combination of a plurality of parameters that can be supported by the terminal device.

公开(公告)号：US20230239111A1

公开(公告)日：2023-07-27

申请号：US18191350

申请日：2023-03-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Xiaohan WANG ,  Wei HAN ,  Shibin GE ,  Xiang REN ,  Yong LIU ,  Xiaoyan BI

IPC: H04L5/00

CPC classification number: H04L5/0051 ,  H04L5/0005

Abstract: This application discloses a method for sending a demodulation reference signal, a method for receiving a demodulation reference signal, and a communication apparatus. The method for sending a demodulation reference signal includes: A network device generates a first signal and sends the first signal on a first time-frequency resource, where the first signal is formed by superimposing M DMRS port signals, and delay segmentation locations corresponding to at least two of the M DMRS port signals are different. Because the first signal is formed by superposing the M DMRS port signals, that is, the network device sends a plurality of DMRS port signals on a same time-frequency resource, reference signal overheads can be reduced. The network device sends more DMRS port signals on the same time-frequency resource. In this way, the network device can send more streams without increasing pilot overheads.

公开(公告)号：US20230170951A1

公开(公告)日：2023-06-01

申请号：US18063621

申请日：2022-12-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Xiaohan WANG ,  Xiaoyan BI

IPC: H04B7/0456 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/0626 ,  H04B7/0663

Abstract: This disclosure provides methods and apparatuses for generating precoding vectors. One method includes: receiving a channel state information (CSI) report, wherein the CSI report indicates a quantity of space-frequency vector pairs to be reported for a quantity of R transport layers, wherein a size of an overhead for indicating the quantity of the space-frequency vector pairs is same when the quantity of R is greater than or equal to 2, wherein each of the space-frequency vector pairs comprises one spatial domain vector and one frequency domain vector, and wherein for each of the R transport layers, one or more frequency domain units associated with the transport layer correspond to one or more precoding vectors, and determining the quantity of space-frequency vector pairs according to the CSI report.

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.