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公开(公告)号：US10367564B2
公开(公告)日：2019-07-30
申请号：US15749054
申请日：2016-07-25
Inventor： Wenhong Chen , Runhua Chen , Tamrakar Rakesh , Qiubin Gao , Hui Li
IPC: H04L5/12 , H04B7/06 , H04B7/0456 , H04B7/0417 , H04L1/00 , H04L5/00 , H04W72/04
Abstract: The present invention discloses a channel state information (CSI) feedback method and related device for an FD MIMO system, and is configured to support the scenario in which various CSI related information needs to be fed back after a CSI measurement in an FD MIMO system. The method comprises: a terminal receives a CSI feedback configuration group indicated by a base station and configuration information for performing a CSI feedback based on the CSI feedback configuration group; and the terminal performs a CSI measurement and feedback according to the CSI feedback configuration group and the configuration information, wherein the CSI feedback configuration group comprises at least one CSI feedback configuration, and the CSI feedback configuration is a downlink signal configuration for a downlink CSI measurement and feedback.
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公开(公告)号：US09948562B2
公开(公告)日：2018-04-17
申请号：US14786440
申请日：2014-04-22
Inventor： Qiubin Gao , Wenhong Chen , Rui Zhao , Ying Peng
IPC: H04L12/801 , H04L5/00 , H04L25/02 , H04L27/26 , H04L5/14
CPC classification number: H04L47/12 , H04L5/0007 , H04L5/0023 , H04L5/0048 , H04L5/0051 , H04L5/0062 , H04L5/0089 , H04L5/14 , H04L25/0226 , H04L27/2613
Abstract: Disclosed are a method and device for transmitting a pilot signal. The method therefor comprises: conducting OFDM modulation on a pilot signal; and sending the modulated pilot signal on the first and/or the last OFDM symbol of a subframe which transmits the pilot signal. In the technical solution provided in the embodiments of the present application, the pilot signal is transmitted on the first and/or the last OFDM symbol of the subframe, thereby not occupying an OFDM symbol for transmitting a data signal, so as to reduce the resource overhead of the pilot signal.
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公开(公告)号：US10790890B2
公开(公告)日：2020-09-29
申请号：US16086009
申请日：2016-12-29
Inventor： Wenhong Chen , Qiubin Gao , Hui Li , Runhua Chen , Tamrakar Rakesh
IPC: H04B7/06 , H04L5/00 , H04B7/0456
Abstract: Disclosed in the present invention are a channel state information (CSI) feedback method, a precoding method, a terminal and a base station. The channel state information (CSI) feedback method disclosed in the present invention comprises: a terminal selects a channel state information-reference signal (CSI-RS) resource or a CSI-RS port on a convention subband from among a CSI-RS resource set as configured in a base station according to downlink channel information; the terminal measures a channel quality indicator (CQI) according to the selected CSI-RS resource or CSI-RS port and a precoding matrix set corresponding to the selected CSI-RS resource or CSI-RS port, wherein the precoding matrix set includes one or more preceding matrices, and a physical resource on the convention subband corresponds to a precoding matrix in the precoding matrix set; and the terminal feeds back the CQI and indication information of the selected CSI-RS resource or CSI-RS port. According to the present invention, the matching degree between CSI and channel state may be improved.
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公开(公告)号：US10778311B2
公开(公告)日：2020-09-15
申请号：US15774268
申请日：2016-10-26
Inventor： Qiubin Gao , Shanzhi Chen , Runhua Chen , Wenhong Chen , Hui Li , Tamrakar Rakesh , Shaohui Sun
IPC: H04B7/06 , H04L1/06 , H04B7/04 , H04B7/0417 , H04B7/0456
Abstract: Disclosed are channel state information feedback and data transmission method and apparatus. The method comprises: determining a first codebook on a base station side, the first codebook being a set composed of precoding matrixes; determining a first codebook on a terminal side, the first codebook being a set composed of precoding matrixes; calculating channel state information according to the first codebooks; and feeding back the channel state information to a base station. Data transmission is performed on the terminal on the base station side, and in the data transmission process, some or all of the precoding matrixes in the first codebooks are utilized to perform processing, over a resource allocated to a terminal, on data to be transmitted. By using the present application, precoding matrixes needed for open-loop AMMO calculation can be determined, traversing of whole space is avoided, difficulties in system design and implementation are reduced, and the system performance is improved.
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公开(公告)号：US10778292B2
公开(公告)日：2020-09-15
申请号：US16082908
申请日：2017-02-21
Inventor： Qiubin Gao , Wenhong Chen , Hui Li , Runhua Chen , Rakesh Tamrakar
IPC: H04B7/04 , H04B7/0417 , H04B7/0456 , H04B7/06
Abstract: The present application provides a method and a device for transmitting feedback information. The method includes: determining, by a transmitting terminal, a first code book in accordance with a channel measurement result, precoding matrices included in the first code book being obtained through transformation of a same construction matrix; calculating, by the transmitting terminal, to obtain a first CQI in accordance with all or part of the precoding matrices in the first code book; and transmitting, by the transmitting terminal, first indication information for indicating the first code book and second indication information for indicating the first CQI to a receiving terminal.
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Patent Agency Ranking
公开(公告)号：US10735158B2
公开(公告)日：2020-08-04
申请号：US15747753
申请日：2016-06-20
Inventor： Rakesh Tamrakar , Qiubin Gao , Runhua Chen , Wenhong Chen , Hui Li
Abstract: A reference signal mapping method and a reference signal mapping device are provided. The reference signal mapping method includes steps of: determining a position of a RE to which a CSI-RS has been mapped in accordance with an N-port reference signal pattern, N being equal to 12 or 16; and performing a resource mapping operation on the CSI-RS in accordance with the determined position of the RE. The position of the RE to which the CSI-RS has been mapped in the N-port reference signal pattern being determined in accordance with a position of the RE to which the CSI-RS has been mapped in one or more of a 2-port reference signal pattern, a 4-port reference signal pattern and an 8-port reference signal pattern. As a result, it is able to achieve the 12-port or 16-port CSI-RS mapping, thereby to achieve the 12-port or 16-port CSI-RS transmission.
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17.发明授权公开(公告)号：US10708018B2
公开(公告)日：2020-07-07
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：US10651997B2
公开(公告)日：2020-05-12
申请号：US15759513
申请日：2016-06-14
Inventor： Rakesh Tamrakar , Runhua Chen , Qiubin Gao , Wenhong Chen , Hui Li
Abstract: The present disclosure provides in some embodiments pilot signal configuration methods and pilot signal configuration devices. The pilot signal configuration method includes steps of: determining configuration information about a pilot signal to be transmitted within a special downlink subframe for a UE; and transmitting the configuration information to the UE. According to some embodiments of the present disclosure, it is able to achieve the configuration of the pilot signal to be transmitted within the special downlink subframe.
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公开(公告)号：US10285194B2
公开(公告)日：2019-05-07
申请号：US15309646
申请日：2015-05-07
Inventor： Rui Zhao , Qiubin Gao , Wenhong Chen , Ying Peng
Abstract: Disclosed are a D2D communication method and device. The method comprises: sending a. preamble on a sub-channel set of a competition region, and monitoring the preamble on the sub-channel set of the competition region; and if the preamble is not monitored on the sub-channel set of the competition region, sending data on a sub-channel set of a data region corresponding to the sub-channel set of the competition region, different sub-channel sets of the competition region corresponding to different sub-channel sets of the data region. The technical solution provided in the embodiments of the present invention can effectively avoid the resource conflict of a D2D UE. In addition, since a preamble occupies fewer resources, competing for sub-channel resources of a data region by sending a preamble could effectively reduce the overhead of resource competition.
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公开(公告)号：US10205500B2
公开(公告)日：2019-02-12
申请号：US15751460
申请日：2016-08-08
Inventor： Hui Li , Qiubin Gao , Runhua Chen , Wenhong Chen , Rakesh Tamrakar
IPC: H04B7/04 , H04B7/0456 , H04B7/06
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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