公开(公告)号：US10063299B2

公开(公告)日：2018-08-28

申请号：US15206062

申请日：2016-07-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kunpeng Liu ,  Leiming Zhang ,  Jianghua Liu ,  Yongxing Zhou

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/0417 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04B7/0478 ,  H04B7/0417 ,  H04B7/0639 ,  H04B7/0658 ,  H04L5/0026 ,  H04W72/0406

Abstract: A precoding matrix set determining method and apparatus, and a parameter indication information sending method and apparatus are provided. The precoding matrix set determining method include: determining, by a first network device, a parameter used for determining a precoding matrix set, where the parameter includes at least one of a phase parameter, an amplitude parameter, a quantity of vectors in the precoding matrix set, a quantity of vectors in a first codebook set in dual-codebook feedback, and a quantity of vectors in a second codebook set in the dual-codebook feedback, and the parameter is not fixed; and using the parameter to determine the precoding matrix set, where the precoding matrix set includes at least one precoding matrix. By using this solution, flexibility of feeding back a precoding matrix indicator is improved.

公开(公告)号：US09960829B2

公开(公告)日：2018-05-01

申请号：US15073147

申请日：2016-03-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiang Wu ,  Leiming Zhang ,  Jianghua Liu

IPC: H04B7/06 ,  H04L1/00 ,  H04W24/02 ,  H04W72/04 ,  H04W88/02

CPC classification number: H04B7/0632 ,  H04B7/0639 ,  H04L1/0026 ,  H04L1/0028 ,  H04W24/02 ,  H04W72/042 ,  H04W88/02

Abstract: The present invention discloses a channel state information feedback method and apparatus. User equipment determines a PMI and a CQI, and a feedback expression manner of the PMI and the CQI, where the feedback expression manner includes a first or a second feedback expression manner, and sends the PMI and the CQI to a network device in the determined feedback expression manner of the PMI and the CQI, where the first feedback expression manner includes: using T CQI values to express CQI of M codewords, and using one PMI value to indicate one PMI, where T is less than M, and there is at least one CQI value that can express CQI of at least two codewords; and the second feedback expression manner includes: using M CQI values to express CQI of M codewords. The present invention may be applied to a scenario in which an antenna quantity increases.

公开(公告)号：US20180103477A1

公开(公告)日：2018-04-12

申请号：US15840659

申请日：2017-12-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiang Wu ,  Jianqin Liu ,  Jianghua Liu

IPC: H04W72/04 ,  H04W24/02 ,  H04L5/00 ,  H04L12/26 ,  H04W72/02 ,  H04W72/12 ,  H04W88/08

CPC classification number: H04W72/0453 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/0053 ,  H04L43/50 ,  H04W24/02 ,  H04W72/02 ,  H04W72/12 ,  H04W88/08

Abstract: The present disclosure describes a physical downlink control channel (PDCCH) candidate determining method and device, and relates to the field of wireless communications, so as to avoid PDCCH blocking and improve reliability of control information transmission. The method of the present invention includes: determining an PDCCH resource set p in a subframe k, where the PDCCH resource set p includes NECCE,p,k=q×r enhanced control channel elements (ECCEs), an PDCCH candidate of an PDCCH with an aggregation level being L corresponds to L ECCEs having consecutive reference numerals, and an PDCCH candidate is capable of carrying an PDCCH; and determining the number of PDCCH candidates at the aggregation level L of a carrier corresponding to an index Cellindex and an ECCE corresponding to each PDCCH candidate, where the ECCE corresponding to each PDCCH candidate at the aggregation level L is related to the index Cellindex.

公开(公告)号：US09906279B2

公开(公告)日：2018-02-27

申请号：US15398551

申请日：2017-01-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Leiming Zhang ,  Qiang Wu ,  Jianghua Liu

IPC: H04B7/0417 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/04 ,  H04L25/03 ,  H04B1/04 ,  H04B7/0452

CPC classification number: H04B7/0417 ,  H04B1/0475 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0639 ,  H04L25/03006

Abstract: The present invention provides a precoding matrix indicator feedback method, a receive end, and a transmit end. The method includes: selecting, by a receive end based on a reference signal, a precoding matrix W from a codebook, where a coefficient α is used to perform phase adjustment on φn in W, φn represents a phase difference between weighted values of a first antenna group and a second antenna group of a transmit end for a transmission signal from a same transmission layer, φ n ∈ { e j ⁢ ⁢ 2 ⁢ ⁢ π ⁢ ⁢ n Q } , and the first antenna group and the second antenna group belong to a same multi-antenna system; and sending, by the receive end, a precoding matrix indicator (PMI) to the transmit end. In this way, using the coefficient α to perform the phase adjustment on φn can increase a size of a codebook set applicable to different antenna configurations, and improve precision of the receive end to feed back a PMI.

公开(公告)号：US09838106B2

公开(公告)日：2017-12-05

申请号：US15160919

申请日：2016-05-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianqin Liu ,  Jianghua Liu

IPC: H04B7/06 ,  H04B7/0417 ,  H04W72/04 ,  H04L1/00

CPC classification number: H04B7/0639 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/065 ,  H04L1/0026 ,  H04W72/0413 ,  H04W72/0446

Abstract: Embodiments relate to a feedback method channel state information. The method includes acquiring, by user equipment, first channel state information based on a first channel state information measurement resource that is configured by a base station and that corresponds to a first antenna port representing a horizontal dimension. The method also includes acquiring, based on a second channel state information measurement resource, which is configured by the base station, of a second antenna port representing a vertical dimension, second channel state information. The method also includes feeding back channel state information to the base station, which includes: feeding back the first channel state information to the base station according to a first feedback mode, and feeding back the second channel state information to the base station according to a second feedback mode, where the second feedback mode is different from the first feedback mode.

公开(公告)号：US09838097B2

公开(公告)日：2017-12-05

申请号：US15439686

申请日：2017-02-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianguo Wang ,  Yongxing Zhou ,  Jianghua Liu

IPC: H04B7/02 ,  H04B7/06 ,  H04B7/08 ,  H04B7/0456

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/0473 ,  H04B7/0626 ,  H04B7/0639

Abstract: Embodiments of the present invention provide a method includes: receiving a reference signal sent by a base 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.

公开(公告)号：US09838096B2

公开(公告)日：2017-12-05

申请号：US15352381

申请日：2016-11-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kunpeng Liu ,  Leiming Zhang ,  Jianghua Liu

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/04 ,  H04B7/0673

Abstract: A method for measuring and feeding back channel information and a corresponding apparatus are provided. A first network device receives a reference signal, measures the reference signal to obtain a measurement result, and selects a first codebook from a first codebook set according to the measurement result; for different sub-vectors Wx (1) and Wx (2), a location of a non-zero vector in the Wx (1) is the same as a location of a non-zero vector in the Wx (2); and formation according to different structures is: for different sub-vectors Wx (1) and Wx (2), a location of a non-zero vector in the Wx (1) is different from a location of a non-zero vector in the Wx (2); and the first network device sends a codebook index to a second network device, where the codebook index corresponds to the first codebook selected from the first codebook set.

公开(公告)号：US20170325206A1

公开(公告)日：2017-11-09

申请号：US15660980

申请日：2017-07-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jianqin Liu ,  Kunpeng Liu ,  Qiang Wu ,  Yongxing Zhou ,  Jianghua Liu

IPC: H04W72/04 ,  H04L5/00

CPC classification number: H04W72/042 ,  H04L5/00 ,  H04L5/0053 ,  H04W72/04

Abstract: The present invention provides a method for assigning the number of control channel candidates and the number of blind detection times, a base station, and a user equipment. The method includes determining a first aggregation level set {L1i} and determining the number of EPDCCH candidates corresponding to each aggregation level in the {L1i}. {L1i} is formed by N aggregation levels supported by an EPDCCH. A second aggregation level set {L2j} is determined along with the number of EPDCCH candidates corresponding to each aggregation level in the {L2j}. {L2j} is formed by M aggregation levels supported by an EPDCCH to be detected, {L2j} is a subset of {L1i}, and the number of EPDCCH candidates corresponding to L2j in {L2j} is greater than or equal to the number of EPDCCH candidates corresponding to L2j in {L1i}.

公开(公告)号：US20170324529A1

公开(公告)日：2017-11-09

申请号：US15491290

申请日：2017-04-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiang Wu ,  Chi Gao ,  Jianqin Liu ,  Jianghua Liu

IPC: H04L5/00 ,  H04W72/04

CPC classification number: H04L5/0048 ,  H04L5/001 ,  H04L5/0053 ,  H04L5/0064 ,  H04W72/04 ,  H04W72/0406

Abstract: The present invention provides methods for transmitting and receiving a control channel, a base station, and a user equipment. The method for transmitting a control channel includes: determining m PRB pairs used for transmitting a control channel to be transmitted; when a distributed transmission mode is used for transmission, determining an aggregation level L of the control channel to be transmitted; determining, according to the aggregation level L, a first control channel candidate at the aggregation level L; and placing, on physical resources to which the first control channel candidate is mapped, control information of the control channel to be transmitted, and transmitting the control information. The present invention improves multiplexing efficiency of control channels of different modes.

公开(公告)号：US09712291B2

公开(公告)日：2017-07-18

申请号：US14268457

申请日：2014-05-02

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Fredrik Berggren ,  Jianghua Liu

IPC: H04L5/00 ,  H04L1/16 ,  H04L1/18 ,  H04L1/06 ,  H04B7/0404

CPC classification number: H04L5/0005 ,  H04B7/0404 ,  H04L1/06 ,  H04L1/1614 ,  H04L1/1812 ,  H04L1/1861 ,  H04L5/001 ,  H04L5/0026 ,  H04L5/0051 ,  H04L5/0055

Abstract: The present invention relates to a method for transmit diversity of HARQ-ACK information feedback in a wireless communication system, said system being adapted to employ transmit diversity and non-transmit diversity transmissions of HARQ-ACK information feedback, said method comprising: assigning uplink control channel resources and modulation symbols to HARQ-ACK states for at least two antenna ports such that said HARQ-ACK states are abled to be transmitted when associated uplink control channel resources are implicitly reserved, wherein at least one of said uplink control channel resources is assigned to more than one of said at least two antenna ports, and wherein uplink control channel resources and modulation symbols assigned to HARQ-ACK states for one of said at least two antenna ports is the same as when non-transmit diversity of HARQ-ACK information feedback is employed; and transmitting HARQ-ACK states assigned according to said assignment step on said at least two antenna ports.