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公开(公告)号：US10938458B2
公开(公告)日：2021-03-02
申请号：US16461087
申请日：2017-11-10
Inventor： Rakesh Tamrakar , Qiubin Gao , Hui Li , Runhua Chen , Chuanjun Li , Mengjun Wang , Xin Su , Qiuping Huang
IPC: H04B7/0456 , H04B7/06 , H04L5/00
Abstract: A method for indicating precoding information, user equipment (UE) and an access network entity are provided according to the disclosure. The method includes: receiving, by a user equipment (UE), a control signaling transmitted by an access network entity; determining, by the UE, a multilevel codebook index in response to the control signaling; and determining, by the UE, a target precoding matrix based on the multilevel codebook index and a multilevel codebook obtained in advance.
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公开(公告)号：US10862644B2
公开(公告)日：2020-12-08
申请号：US16349014
申请日：2017-12-28
Inventor： Hui Li , Qiubin Gao , Rakesh Tamrakar , Xin Su , Runhua Chen , Qiuping Huang , Chuanjun Li , Mengjun Wang
IPC: H04L5/00 , H04B7/0456
Abstract: The present disclosure provides a reference signal transmission method, a transmitter and a receiver. The reference signal transmission method includes: precoding, by a transmitter, a data stream for user data through a second precoding matrix so as to acquire D virtual data streams; precoding, by the transmitter, the D virtual data streams through a first precoding matrix, and transmitting the D precoded virtual data streams to a receiver via T antenna groups, each antenna group including one or more antenna units or antenna ports having a same phase noise; transmitting, by the transmitter, D demodulation reference signals to the receiver; and transmitting, by the transmitter, M phase-tracking reference signals to the receiver, the M phase-tracking reference signals being adopted to track phase changes in the T antenna groups caused by one or more phase noise sources.
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公开(公告)号：US10826580B2
公开(公告)日：2020-11-03
申请号：US15570263
申请日：2016-03-31
Inventor： Qiubin Gao , Shanzhi Chen , Wenhong Chen , Hui Li , Runhua Chen , Rakesh Tamrakar
IPC: H04B7/0456 , H04B7/06
Abstract: The embodiments of the present disclosure provide a method and a device for constraining a codebook subset. The method includes steps of: determining codebook subset constraint parameters for all or parts of matrix sets for constructing a codebook respectively, each codebook subset constraint parameter indicating an available matrix in a corresponding matrix set; and transmitting the determined codebook subset constraint parameters to a UE. The number of the matrices in each matrix set for constructing the codebook is far less than the number of precoding matrices in the codebook.
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公开(公告)号：US10812235B2
公开(公告)日：2020-10-20
申请号：US16337936
申请日：2017-09-27
Inventor： Hui Li , Runhua Chen , Qiubin Gao , Tamrakar Rakesh , Qiuping Huang
Abstract: Disclosed are a reference signal mapping method and device, used for realizing a CSI-RS mapping of 16 or more ports, so as to realize a CSI-RS transmission of 16 or more ports. The method comprises: according to an N port reference signal pattern, determining that a channel state information reference signal (CSI-RS) is mapped on a resource unit RE, N being an integer greater than 16, wherein, an RE position, having one N port CSI-RS of the N port reference signal pattern mapped thereto, is determined according to an RE position having a CSI-RS in a plurality of groups of 8 port reference signal patterns mapped thereto, each S port in the N port is multiplexed with S code words of 8 code words using an 8-bit orthogonal spreading code, and the 8 port reference signal pattern is an 8 port CSI-RS pattern defined by 3GPP Rel-13; and performing resource mapping on the CSI-RS according to the determined RE.
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公开(公告)号：US10554275B2
公开(公告)日：2020-02-04
申请号：US15521607
申请日：2015-09-21
Inventor： Runhua Chen , Hui Li , Qiubin Gao
Abstract: A CSI feedback method, a CSI acquisition method, a CSI feedback device and a CSI acquisition device are provided, so as to reduce pilot resources configured for a UE and reduce the difficulty in processing CSI progresses at a UE side, thereby to facilitate the CSI feedback and acquisition and save resources. The CSI acquisition method includes steps of: determining beamforming array information in a first dimension; beamforming a pilot signal in a second dimension in accordance with the beamforming array information in the first dimension, and transmitting the beamformed pilot signal in the second dimension to a UE through a pilot resource in the second dimension; and receiving, from the UE, CSI in the second dimension obtained by measuring the pilot signal in the second dimension.
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Patent Agency Ranking
公开(公告)号：US10396875B2
公开(公告)日：2019-08-27
申请号：US15749122
申请日：2016-07-21
Inventor： Wenhong Chen , Shanzhi Chen , Qiubin Gao , Runhua Chen , Tamrakar Rakesh , Hui Li
Abstract: The present application provides a channel state information (CSI) feedback and receiving method and device. The CSI feedback method by a UE comprises: determining, according to an indication of a base station, at least one CSI feedback configuration group configured by the base station, wherein each CSI feedback configuration group comprises at least one CSI feedback configuration; and upon determination of a need to report CSI, reporting, via a PUCCH or PUSCH, to the base station CSI acquired based on a first CSI feedback configuration, wherein the first CSI feedback configuration is a CSI feedback configuration determined, according to location information of a CSI feedback configuration in the most recent report or location information of a CSI feedback configuration indicated by the base station, from a corresponding CSI feedback configuration group by the UE. The present application supports independent reporting of location information and corresponding CSI, thus improving the detection performance of such information, and further supports a base station to acquire CSI corresponding to a specified CSI feedback configuration, thus enabling more flexible downlink scheduling and transmission.
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公开(公告)号：US10305569B2
公开(公告)日：2019-05-28
申请号：US15563464
申请日：2016-02-03
Inventor： Hui Li , Qiubin Gao , Runhua Chen , Tamrakar Rakesh , Wenhong Chen
IPC: H04B7/06 , H04W24/10 , H04L1/00 , H04B7/0456
Abstract: Disclosed are a channel state information feedback and acquisition method and device. The application comprises: acquiring, by a terminal, a first-dimension downlink reference signal resource, S second-dimension downlink reference signal resources and a first corresponding relationship of the above configured by a network device; measuring, by the terminal and according to the first-dimension downlink reference signal resource, a first-dimension downlink reference signal, and selecting, by the terminal and according to the measured first-dimension PMI and the first corresponding relationship, a resource for measuring a second-dimension downlink reference signal, measuring, according to the resource, the second-dimension downlink reference signal, and feeding back channel state information, wherein the second-dimension reference signal is transmitted after forming a first-dimension beamforming weight. The present application enables acquisition of channel state information between a network device and a terminal, and adjustment of the first-dimension beamforming weight for forming the second-dimension reference signal according to the PMI fed back by the first-dimension.
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公开(公告)号：US20170214447A1
公开(公告)日：2017-07-27
申请号：US15328489
申请日：2015-07-17
Inventor： Hui Li
IPC: H04B7/06 , H04W24/02 , H04B17/327 , H04L5/00
CPC classification number: H04B7/0617 , H04B7/04 , H04B7/0626 , H04B7/0639 , H04B7/0695 , H04B17/327 , H04L1/06 , H04L5/0048 , H04W24/02
Abstract: The embodiments of the present invention relate to the field of wireless communications, and more particularly, to a method and apparatus for determining three-dimensional beam pre-coding information so as to perform three-dimensional beam forming. In the embodiments of the present invention, a network device first determines a first optimal beam forming vector, and then determines a second optimal beam forming vector from a second beam forming vector set corresponding to the first optimal beam forming vector and performs channel measurement via a formed pilot to determine optimal pre-coding information about a second dimension. Since an optimal beam forming vector therein is determined based on a beam forming vector set with a coarse particle granularity, and then an optimal beam forming vector therein is determined based on a corresponding beam forming vector set with a fine particle granularity, the purpose of determining the optimal beam forming vector with fine particle granularity and the optimal pre-coding information is achieved, which, compared with the prior art, reduces system resource expense, and further reduces the complexity of a user equipment.
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公开(公告)号：US11949620B2
公开(公告)日：2024-04-02
申请号：US16496698
申请日：2018-03-14
Inventor： Rakesh Tamrakar , Qiubin Gao , Xin Su , Hui Li , Qiuping Huang
IPC: H04L5/00 , H04W72/044 , H04W72/1268 , H04W72/23
CPC classification number: H04L5/0051 , H04W72/046 , H04W72/1268 , H04W72/23
Abstract: A signal processing method and device are provided. The method includes indicating a first uplink sounding reference signal resource to a terminal, wherein the first uplink sounding reference signal resource is used for uplink beam scanning; receiving a uplink sounding reference signal transmitted by the terminal by using the first uplink sounding reference signal resource; determining a target uplink sounding reference signal based on the uplink sounding reference signal transmitted by the terminal, and transmitting an identifier of the target uplink sounding reference signal to the terminal; indicating a second uplink sounding reference signal resource to the terminal, the second uplink sounding reference signal resource being used to cause the terminal to transmit an uplink sounding reference signal for channel measurement based on the identifier of the target uplink sounding reference signal and the second uplink sounding reference signal resource.
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公开(公告)号：US11770757B2
公开(公告)日：2023-09-26
申请号：US16317945
申请日：2017-07-11
Inventor： Hui Li , Qiubin Gao , Runhua Chen , Chuanjun Li , Xin Su , Yang Song , Rakesh Tamrakar , Yu Yang , Qiuping Huang , Mengjun Wang
CPC classification number: H04W48/08 , H04L5/0094 , H04L27/2666
Abstract: A method and a device for accessing a system information area or a network area are provided. The method includes: receiving, by a terminal, at least one initial access signal (IAS) transmitted from the system information area or the network area; and obtaining, by the terminal, one or more of a subframe boundary, a system bandwidth, a starting frequency and an ending frequency of the system information area or the network area based on the received IAS.
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