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公开(公告)号：US10271323B2
公开(公告)日：2019-04-23
申请号：US15599260
申请日：2017-05-18
发明人： Jianqin Liu , Kunpeng Liu , Qiang Wu , Jianghua Liu
摘要： In a system and method of control channel transmission in the communications field, REs, except those used for transmitting a DMRS, are grouped in each physical resource block pair of L physical resource block pairs. The L physical resource block pairs are determined to be used to transmit a control channel into N eREGs. The number of valid REs are calculated except other overheads in each eREG of the N eREGs. Each of the eCCEs are mapped onto M eREGs according to the number of valid REs included in each eREG of the N eREGs of each physical resource block pair. The eCCE is sent in the REs included in the eREG.
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公开(公告)号：US10205497B2
公开(公告)日：2019-02-12
申请号：US15382206
申请日：2016-12-16
发明人： Kunpeng Liu , Leiming Zhang , Jianghua Liu
IPC分类号： H04B7/04 , H04B7/06 , H04L1/06 , H04B7/0417 , H04B7/0456
摘要： Embodiments of the present invention disclose a signal transmission method, a system, and a device. When measuring a reference signal and determining channel quality, UE obtains a difference between codeword to CSI-RS mapping relationships by using a channel quality measurement model, may calculate an optimized mapping relationship by means of measurement, and determines at least one mapping relationship from these mapping relationships, to adjust a codeword to CSI-RS mapping relationship of a channel, thereby improving system flexibility and increasing channel resource utilization.
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公开(公告)号：US10063296B2
公开(公告)日：2018-08-28
申请号：US15808318
申请日：2017-11-09
发明人： Jianguo Wang , Yongxing Zhou , Jianghua Liu
IPC分类号： H04B7/08 , H04B7/0456 , H04B7/06
CPC分类号： H04B7/0456 , H04B7/0417 , H04B7/0473 , H04B7/0626 , H04B7/0639
摘要： Embodiments of the present invention provide a method includes: receiving a reference signal sent by abase station; selecting, based on the reference signal, a precoding matrix from a codebook, where a precoding matrix W included in the codebook is a product of three matrices being W1, Z, and W2, that is, W=W1ZW2, where both W1 and Z are block diagonal matrices, W1=a formula (I), Z=a formula (II), each of W1 and Z includes at least one block matrix, that is, NB≥1, and each column of each block matrix Zi in the matrix Z has the following structure formula (III); and sending a precoding matrix indicator (PMI) to the base station, where the PMI corresponds to the selected precoding matrix, and is used by the base station to obtain the selected precoding matrix W according to the PMI.
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公开(公告)号：US10020856B2
公开(公告)日：2018-07-10
申请号：US15700909
申请日：2017-09-11
发明人： Kunpeng Liu , Leiming Zhang , Jianghua Liu
IPC分类号： H04B7/04 , H04B7/0456 , H04B7/06
CPC分类号： H04B7/0456 , H04B7/04 , H04B7/0673 , H05K999/99
摘要： A method and an apparatus for measuring and feeding back channel information are disclosed. In an embodiment the method includes receiving, by a first network device, a reference signal and measuring the reference signal to obtain a measurement result. The method further includes selecting a first codebook from a first codebook set according to the measurement result, wherein the first codebook set comprises at least two first codebooks, a sub-vector Wx of each first codebook is formed by a zero vector and a non-zero vector, wherein the vectors forming the Wx correspond to different groups of antenna ports, and sending a codebook index to a second network device, wherein the codebook index corresponds to the first codebook selected from the first codebook set.
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公开(公告)号：US20180159673A1
公开(公告)日：2018-06-07
申请号：US15885332
申请日：2018-01-31
发明人： Jianguo Wang , Jianghua Liu , Yongxing Zhou
IPC分类号： H04L5/00 , H04L1/00 , H04B17/309
CPC分类号： H04L5/0048 , H04B17/309 , H04L1/0026 , H04L5/0023
摘要： A method and an apparatus for measuring communication quality are disclosed. The method includes: acquiring reference signal resource configuration information, where the reference signal resource configuration information at least includes: reference signal port configuration information, and reference signal power information of at least one port group; or the reference signal resource configuration information at least includes: reference signal port configuration information, and a ratio of a power of a data channel in at least one port group to a power of a reference signal; and sending the acquired reference signal resource configuration information to user equipment. Therefore, in a multi-antenna system, accurate signal quality measurement information is acquired, or more accurate channel state information is acquired.
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16.发明授权公开(公告)号：US09979453B2
公开(公告)日：2018-05-22
申请号：US14872427
申请日：2015-10-01
发明人： Jianguo Wang , Yongxing Zhou , Jianghua Liu
IPC分类号： H04B7/06 , H04B7/0452 , H04B7/024 , H04L5/00 , H04W72/04
CPC分类号： H04B7/0619 , H04B7/024 , H04B7/0452 , H04B7/0691 , H04L5/0023 , H04L5/0035 , H04L5/0046 , H04L5/0048 , H04L5/006 , H04L5/0094 , H04W72/0446
摘要： Embodiments of the present invention relate to methods and apparatuses for receiving and sending a reference signal, user equipment, and a base station. A method for receiving a reference signal includes: receiving resource configuration information of a reference signal, where the resource configuration information of the reference signal includes information about an antenna port configuration and a reference signal subframe configuration, the antenna port configuration indicates an antenna port structure, and the reference signal subframe configuration indicates a reference signal subframe for sending the reference signal on one or more antenna port groups; and receiving the reference signal according to the resource configuration information of the reference signal. In the embodiments of the present invention, a communications system can adapt to an antenna array structure and more antenna port quantity configurations, which is used for cell selection or MCS selection and scheduling, thereby improving a system throughput.
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公开(公告)号：US20180123670A1
公开(公告)日：2018-05-03
申请号：US15856460
申请日：2017-12-28
发明人： Mattias Frenne , Jianghua Liu
IPC分类号： H04B7/06 , H04W72/04 , H04B7/0417 , H04B7/10 , H04B7/04
摘要： A mobile station is connected to a multi-carrier cellular communication system having a plurality of sub-carriers. The sub-carriers are classified into K frequency sub-bands, channel state information (CSI) of the frequency sub-bands is represented by matrices Wi (i=0 . . . K−1), where K is an integer grater than 1. The mobile station determines a first sub-index k1 for the K matrices Wi (i=0 . . . K−1), and a second sub-index k2 for each one of the K matrices Wi(i=0 . . . K−1). The first sub-index k1 is common for all frequency sub-bands, and the second sub-index k2 is specific for the indexed matrix that corresponds to one frequency sub-band. The mobile station reports to a base station of the multi-carrier cellular communication system the first sub-index k1 and at least one second sub-index k2.
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公开(公告)号：US09954589B2
公开(公告)日：2018-04-24
申请号：US15416561
申请日：2017-01-26
发明人： Jianghua Liu , Leiming Zhang , Yongxing Zhou
CPC分类号： H04B7/06 , H04B7/0478 , H04B7/0617 , H04B7/0626 , H04B7/0639 , H04J11/00 , H04L5/0048
摘要： The present invention discloses a method for feeding back channel state information, a method for receiving channel state information, and a device. The method includes: selecting, by a terminal, a precoding matrix from a preset codebook subset for each subband in N subbands according to a configured reference signal, where each precoding matrix in the codebook subset is identified by a first PMI, a second PMI, and a third PMI that is used to indicate a phase relationship, first PMIs corresponding to the precoding matrices selected by the terminal for all subbands in the N subbands are the same, the precoding matrix selected for each subband in the N subbands corresponds to one second PMI, and third PMIs corresponding to the precoding matrices for all subbands in the N subbands are the same; and reporting, by the terminal, the first PMI, the second PMI, and the third PMI.
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公开(公告)号：US09843366B1
公开(公告)日：2017-12-12
申请号：US15371840
申请日：2016-12-07
发明人： Qiang Wu , Leiming Zhang , Jianghua Liu
IPC分类号： H04B7/02 , H04L1/02 , H04B7/0456 , H04L1/06 , H04B7/0417 , H04B7/06
CPC分类号： H04B7/0456 , H04B7/0417 , H04B7/0639 , H04L1/06
摘要： Embodiments disclose a method for transmitting a 4-antenna precoding matrix, a user equipment, and a base station. The method includes determining a rank used for indicating the number of transmission layers, determining a first precoding matrix in a codebook set corresponding to the rank, determining a first PMI and a second PMI used for indicating the first precoding matrix, and sending the first PMI and the second PMI used for indicating the first precoding matrix to a base station.
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公开(公告)号：US09756625B2
公开(公告)日：2017-09-05
申请号：US14611837
申请日：2015-02-02
发明人： Kunpeng Liu , Chi Gao , Jianghua Liu , Jianqin Liu
CPC分类号： H04W72/042 , H04L5/0007 , H04L5/0053 , H04W72/04
摘要： This application provides an enhanced physical downlink control channel transmission method and apparatus. The method includes: in a physical resource block set, separately arranging first resource groups in each physical resource block pair PRB pair, where the first resource groups are resource element groups eREGs or REGs, and the physical resource block set includes at least one of the physical resource block pairs; numbering second resource groups according to a correspondence between the first resource groups and the second resource groups in the physical resource block set, where the second resource groups are control channel element eCCE groups or control channel candidates; determining numbers of the second resource groups for transmitting an E-PDCCH; and mapping, according to the determined numbers, the E-PDCCH to the corresponding first resource groups for transmission. The technical solution of this application resolves an E-PDCCH transmission problem.
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