公开(公告)号：US20210021319A1

公开(公告)日：2021-01-21

申请号：US17062139

申请日：2020-10-02

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang GAO ,  Ruiqi ZHANG

IPC: H04B7/06 ,  H04L5/00

Abstract: This application provides sounding reference signal transmission methods and apparatuses. One method comprises: determining, by a terminal device, that a sounding reference signal (SRS) to be transmitted is an nSRSth transmission of a plurality of SRSβtransmissions, wherein nSRS is a non-negative integer; selecting, by a terminal device, an antenna group of Λ antenna groups to transmit the sounding reference signal (SRS) based on Λ and nSRS, such that when sending the SRS for 2Λ times, the SRS is sent through each of the Λ antenna groups at least once, wherein Λ is a positive integer greater than or equal to 3; and sending, by the terminal device during the nSRSth transmission, the SRS through antenna ports comprised in the selected antenna group.

公开(公告)号：US20200266869A1

公开(公告)日：2020-08-20

申请号：US16867819

申请日：2020-05-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ruiqi ZHANG ,  Jianqin LIU

IPC: H04B7/06 ,  H04L1/00 ,  H04L5/00

Abstract: This application discloses a data transmission solution. A terminal device generates channel state information and data for transmission in a data channel. The transmit power of the data channel is determined based on the number of bits used to transmit the data and the number of bits used to transmit the channel state information. The solution of this application reduces bit error probability and improves data decoding accuracy.

公开(公告)号：US20200177338A1

公开(公告)日：2020-06-04

申请号：US16788007

申请日：2020-02-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ruiqi ZHANG ,  Jianqin LIU

IPC: H04L5/00

Abstract: This application provides a data transmission method, a network device, and a terminal device. The method includes: generating, by the network device, first information, where a value of a bit included in the first information is used to indicate a demodulation reference symbol (DMRS) port combination in a second set, each DMRS port combination in the second set belongs to a first set, the first set includes a plurality of DMRS port combinations, the DMRS port combination includes at least one DMRS port, and a quantity of DMRS port combinations included in the second set is less than a quantity of DMRS port combinations included in the first set; and sending, by the network device, the first information to the terminal device. According to embodiments of this application, signaling overheads can be reduced.

公开(公告)号：US20190393938A1

公开(公告)日：2019-12-26

申请号：US16560768

申请日：2019-09-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xueru LI ,  Ruiqi ZHANG

IPC: H04B7/0456 ,  H04B7/0417

Abstract: A bit field indication manner is provided. A first field is determined, where the first field includes T1 bits, at least one of the T1 bits indicates at least two elements {bi0, bi1, . . . , bik} in a set B, the at least one bit further indicates at least one element {θj0, θj1, . . . , θjh} in a set Φ, and at least one element in {bi0, bi1, . . . , bik} and at least one element in {θj0, θj1, . . . , θjh} are used to form a precoding matrix, where the set B={b0, b1, . . . , bT2−1}, an element in the set B is a vector with a length of N/4, the set Φ={θ0, θ1, . . . , θS−1}, an element in Φ is a complex number of a unit amplitude.

公开(公告)号：US20190288751A1

公开(公告)日：2019-09-19

申请号：US16434556

申请日：2019-06-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping JIN ,  Ruiqi ZHANG

IPC: H04B7/0417 ,  H04L5/00 ,  H04B7/06 ,  H04W72/04

Abstract: Embodiments of this application disclose a terminal device capability transmission method, apparatus, and system. A terminal device reports, to a network device, capability information used to indicate a channel state information CSI reporting capability of the terminal device. The capability information is associated with a quantity, supported by the terminal device in a time-domain unit, of ports of pilots used for CSI measurement, and is used to enable the network device receiving the capability information to learn the CSI reporting capability of the terminal device, thereby determining a CSI measurement configuration of the terminal device.

公开(公告)号：US20190238198A1

公开(公告)日：2019-08-01

申请号：US16375312

申请日：2019-04-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ruiqi ZHANG ,  Xueru LI

IPC: H04B7/0456 ,  H04B7/06 ,  H04L1/00 ,  H04L5/00

Abstract: This application provides a method for determining a precoding matrix set, so as to avoid a case in which a relatively large quantity of precoding matrices in a precoding matrix set cannot be used, thereby improving system performance. A terminal device receives indication information from a network device, and determines a second precoding matrix set from a first precoding matrix set whose rank is R based on the indication information. Each precoding matrix W in the first precoding matrix set satisfies W=W1×W2, the second precoding matrix set is a proper subset of the first precoding matrix set, and the second precoding matrix set does not include W=W1×W2 that satisfies the specific condition in the first precoding matrix set.

公开(公告)号：US20190229857A1

公开(公告)日：2019-07-25

申请号：US16369067

申请日：2019-03-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ruiqi ZHANG ,  Jianqin LIU

IPC: H04L1/18 ,  H04W76/27 ,  H04L1/00 ,  H04L27/26 ,  H04W72/12 ,  H04L27/00

Abstract: The present disclosure relates to reference symbol indication methods, devices, and systems. One example method includes receiving, by a user equipment, a target parameter including a target reference symbol indication sent by a base station, determining a target transmission mode and target reference symbol information based on the target parameter and a preset reference symbol mapping relationship, generating a target reference symbol based on the target reference symbol information, and demodulating data based on the target reference symbol and the target transmission mode, where the preset reference symbol mapping relationship includes a mapping relationship among a reference symbol indication, reference symbol information, and a transmission mode.

公开(公告)号：US20190222285A1

公开(公告)日：2019-07-18

申请号：US16360446

申请日：2019-03-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Di ZHANG ,  Ruiqi ZHANG

IPC: H04B7/06 ,  H04B7/0456

Abstract: The present disclosure provide a method and an apparatus for transmitting channel state information. A terminal device receives a reference signal from a network device, obtains a precoding matrix based on the reference signal. The terminal device determines first amplitude information and second amplitude information of the precoding matrix. The first amplitude information is used to indicate amplitude quantization information of a wideband, and the second amplitude information is used to indicate amplitude quantization information of N subbands of the wideband. The terminal device sends the first amplitude information and the second amplitude information to the network device.

公开(公告)号：US20190036580A1

公开(公告)日：2019-01-31

申请号：US16148296

申请日：2018-10-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ruiqi ZHANG ,  Jianqin LIU

IPC: H04B7/0456

CPC classification number: H04B7/0478 ,  H04B7/0639 ,  H04B7/0658 ,  H04L1/06 ,  H04W84/042

Abstract: A method and apparatus for precoding matrix indicator feedback reduce a quantity of bits in the feedback. In the method, a terminal device receive a reference signal from a base station, determines a precoding matrix W in a precoding matrix set corresponding to a rank indication. W satisfies W=W1×W2×W3, W1, W2 and W3 and matrices and respectively corresponding to a first, second and third precoding matrix indicator. None of W1, W2, and W3 is an identity matrix, and the 2M columns in W1 comprise every column in W1×W2. The terminal device transmits the rank indication, the first precoding matrix indicator, the second precoding matrix indicator, and the third precoding matrix indicator to the base station. Therefore, a quantity of to-be-selected vectors is reduced by using a first-stage feedback and a second-stage feedback, thereby reducing calculation complexity of third-stage feedback, and reducing a quantity of bits in the third-stage feedback.