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公开(公告)号：US20210120536A1
公开(公告)日：2021-04-22
申请号：US16494647
申请日：2018-02-26
Inventor： Qiubin GAO , Rakesh TAMRAKAR , Xin SU , Runhua CHEN
Abstract: A method and an apparatus for determining an uplink transmission beam are provided. The method includes: a base station transmitting uplink transmission beam indication information to a terminal; where the uplink transmission beam indication information includes beam type indication information, the beam type indication information is used to indicate that the uplink transmission beam for the terminal is obtained based on uplink reference signals, or the beam type indication information is used to indicate that the uplink transmission beam for the terminal is obtained based on downlink reference signals, so as to ensure that the base station is capable of selecting an uplink transmission beam for the terminal.
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公开(公告)号：US20210045140A1
公开(公告)日：2021-02-11
申请号：US16969151
申请日：2019-02-12
Inventor： Qiuping HUANG , Runhua CHEN , Qiubin GAO , Rakesh TAMRAKAR
IPC: H04W72/12
Abstract: A data transmission method and a data transmission device are provided. The method includes: receiving first indication information sent by a network side device, the first indication information is used to instruct the UE to send a first signal; and determining actual first uplink transmission characteristic of the first signal when valid first uplink transmission characteristic of the first signal is not obtained, and sending the first signal through the actual first uplink transmission characteristic, or not sending the first signal when valid first uplink transmission characteristic of the first signal is not obtained.
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公开(公告)号：US20200275398A1
公开(公告)日：2020-08-27
申请号：US16646116
申请日：2018-08-30
Inventor： Ren DA , Zheng ZHAO , Bin REN , Tony EKPENYONG , Pierre BERTRAND , Fangchen CHENG , Tie LI , Qiubin GAO
Abstract: A timing advance indication method, a base station, a terminal and a device are provided. The method includes: transmitting subcarrier spacing configuration information of a physical uplink shared channel and/or a physical uplink control channel to a terminal; receiving a preamble fed back by the terminal based on subcarrier spacing configuration information; obtaining a quantized value of a timing advance corresponding to a tracking area based on the preamble; and transmitting the quantized value of the timing advance to the terminal.
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公开(公告)号：US20200036421A1
公开(公告)日：2020-01-30
申请号：US16337373
申请日：2017-09-13
Inventor： Xin SU , Qiubin GAO , Rakesh TAMRAKAR , Runhua CHEN , Chuanjun LI , Mengjun WANG , Hui LI , Qiuping HUANG
IPC: H04B7/06 , H04B7/0452 , H04B7/08 , H04W16/28 , H04L5/00
Abstract: A beam scanning and search tracking method and device are provided. The method includes constructing analog beams and performing digital beam-forming to the analog beams so as to form equivalent beams; transmitting reference signals to a second communication node by using the equivalent beams; receiving beam information about the equivalent beams and corresponding channel state information fed back by the second communication node according to the reference signals; performing a beam scanning operation and a search tracking operation by using the beam information and the channel state information.
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公开(公告)号：US20190341979A1
公开(公告)日：2019-11-07
申请号：US16337841
申请日：2017-07-12
Inventor： Qiubin GAO , Runhua CHEN , Tamrakar RAKESH , Hui LI , Qiuping HUANG
IPC: H04B7/0456 , H04B7/06 , H04L1/00 , H04W88/06
Abstract: Disclosed in the present invention are a method and a device for transmitting channel state information, for solving the problem that due to the limitation of a codebook structure, the prior art can only provide channel state information with limited precision and it is not suitable for a base station to use a transmission scheme of an advanced preprocessing algorithm. The method comprises: a terminal determining a basis matrix according to a candidate wave beam vector set, the basis matrix being a matrix formed by N wave beam vectors from the candidate wave beam vector set, the N being a positive integer; the terminal determining a combined coefficient matrix according to the basis matrix and a channel state parameter; the terminal feeding back the identification information of the basis matrix and the combined coefficient matrix to a base station. The invention effectively improves the precision of channel state information feedback, and improves the performance of multi-antenna transmission, especially multiple user-multiple input multiple output (MU-MIMO) transmission.
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Patent Agency Ranking
公开(公告)号：US20190312697A1
公开(公告)日：2019-10-10
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：US20190297560A1
公开(公告)日：2019-09-26
申请号：US16317829
申请日：2017-06-08
Inventor： Qiubin GAO , Runhua CHEN , Hui LI , Tamrakar RAKESH , Qiuping HUANG , Yu YANG , Yang SONG , Xin SU , Mengjun WANG , Chuanjun LI
Abstract: Disclosed are a method and apparatus for transmitting an initial access signal, thus solving the existing problem wherein transmitting and detecting of synchronization signals cannot be applied to large-scale network coverage of a future communication system. The method comprises: determining at least one to-be-transmitted identification information of a synchronization block, the synchronization block comprising at least two components for transmitting an initial access signal, and different components occupying different time-frequency resources of the synchronization block; determining an initial access signal transmitted by each component in the synchronization block according to the identification information; and determining a time-frequency resource occupied by each component in the synchronization block and transmitting the initial access signal of the component on the time-frequency resource occupied by each component.
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公开(公告)号：US20190229869A1
公开(公告)日：2019-07-25
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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29.发明申请公开(公告)号：US20180309556A1
公开(公告)日：2018-10-25
申请号：US15770156
申请日：2016-09-12
Inventor： Wenhong CHEN , Xueming PAN , Qiubin GAO , Rakesh TAMRAKAR
Abstract: A method and a device for determining a CSI-RS transmission resource are provided. The method includes: acquiring, by a UE, uplink/downlink subframe configuration information for determining a position of a CSI-RS resource; determining, by the UE, a type of a subframe within which the CSI-RS is to be transmitted in accordance with the uplink/downlink subframe configuration information; and determining, by the UE, the position of the CSI-RS resource within the subframe within which the CSI-RS is to be transmitted in accordance with the determined type of the subframe.
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公开(公告)号：US20180241449A1
公开(公告)日：2018-08-23
申请号：US15751460
申请日：2016-08-08
Inventor： Hui LI , Qiubin GAO , Runhua CHEN , Wenhong CHEN , Rakesh TAMRAKAR
CPC classification number: H04B7/0486 , H04B7/0473 , H04B7/0478 , H04B7/0617 , H04B7/0639
Abstract: A precoding matrix determination method and a precoding matrix determination device are provided. The precoding matrix determination method includes: dividing each of the groups of vertical-dimension beams into a plurality of subgroups of vertical-dimension beams, and dividing each of the groups of horizontal-dimension beams into a plurality of subgroups of horizontal-dimension beams; determining a first stage codebook in accordance with a Kronecker product of each subgroup of vertical-dimension beams acquired by dividing each of the groups of vertical-dimension beams and each subgroup of horizontal-dimension beams acquired by dividing each of the groups of horizontal-dimension beams; and selecting a plurality of columns of beams from the determined first stage codebook using a second stage codebook, and performing phase adjustment to determine a precoding matrix.
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