公开(公告)号：US20180343158A1

公开(公告)日：2018-11-29

申请号：US16055334

申请日：2018-08-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04L27/26 ,  H04L5/00 ,  H04J1/00 ,  H04J11/00

Abstract: The present invention provides a signal sending apparatus, a signal detection apparatus, a signal sending and detection system, a signal sending method, and a signal detection method. The apparatus determines a time unit that is in each time window and that is used to transmit a synchronization signal, and transmits the synchronization signal in the determined time unit in each time window. Therefore, a synchronization signal is always located in a time unit that has a fixed location in each time window, so that a device at a receive end needs to perform detection only in a fixed time unit in each time window, thereby reducing complexity of designing and detecting the synchronization signal.

公开(公告)号：US10009889B2

公开(公告)日：2018-06-26

申请号：US15623188

申请日：2017-06-14

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04W72/04 ,  H04W72/00 ,  H04L5/00

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

Abstract: A method and an apparatus for allocating control channel candidates is provided, which can allocate control channel candidates at different aggregation levels to K ePDCCH sets and reduce complexity of blind detection performed by a UE. The method includes: determining K sets for transmitting a control channel, where each set in the K sets includes at least one physical resource block pair; and allocating control channel candidates at each aggregation level to at least one set in the K sets according to at least one of aggregation levels supported by the control channel to be transmitted, the number of control channel candidates corresponding to each aggregation level, the K sets for transmitting the control channel, and types of the sets.

公开(公告)号：US20180091209A1

公开(公告)日：2018-03-29

申请号：US15829206

申请日：2017-12-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianqin Liu ,  Jianghua Liu

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

Abstract: The present application discloses a method for feeding back channel state information (CSI), comprising: acquiring first and second CSI based on a first and a second CSI measurement resource respectively, obtaining a channel quality indicator (CQI) based on the first CSI and the second CSI, wherein the first CSI comprises a first and a second type of precoding matrix indicator (PMI1 and PMI2) and a first rank indicator (Rh), and the second CSI comprises a first and a second type of PMI (PMI3 and PMI4) and a second RI (RI2); and feeding back third CSI to a base station, wherein the third CSI comprises third PMI information, third RI information, and the CQI, wherein the third PMI information is obtained based on at least three of the PMI1, the PMI2, the PMI3, and the PMI4, and the third RI information is obtained based on the RI1 and the RI2.

公开(公告)号：US09860896B2

公开(公告)日：2018-01-02

申请号：US14802585

申请日：2015-07-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiang Wu ,  Jianqin Liu ,  Jianghua Liu

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

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

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

公开(公告)号：US20170338868A1

公开(公告)日：2017-11-23

申请号：US15371840

申请日：2016-12-07

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiang Wu ,  Leiming Zhang ,  Jianghua Liu

IPC: H04B7/0456 ,  H04B7/0417 ,  H04B7/06 ,  H04L1/06

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/0639 ,  H04L1/06

Abstract: 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.

公开(公告)号：US20170311298A1

公开(公告)日：2017-10-26

申请号：US15599260

申请日：2017-05-18

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04W72/04 ,  H04L5/00

CPC classification number: H04W72/042 ,  H04L5/0053 ,  H04L5/0064 ,  H04W72/0406

Abstract: 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.

公开(公告)号：US20170237544A1

公开(公告)日：2017-08-17

申请号：US15410774

申请日：2017-01-20

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Junwei Wang ,  Xiaoan Fan ,  Jianghua Liu

IPC: H04L5/14 ,  H04L5/00 ,  H04L12/931

CPC classification number: H04L5/14 ,  H04J11/00 ,  H04L5/0007 ,  H04L5/003 ,  H04L5/0091 ,  H04L5/22 ,  H04L49/201 ,  H04W4/06 ,  H04W72/005 ,  H04W72/02 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/0493

Abstract: A method and device for transmitting a multimedia broadcast multicast service are disclosed. A base station sends to a user equipment device position information of specific radio frames in a time unit, and position information of a specific subframe in each of the specific radio frames in the time unit. The time unit includes 2M radio frames, and the specific radio frames are two or more of the 2M radio frames comprised in the time unit, where M is a nonnegative integer. The base station sends the multimedia broadcast multicast service carried in the specific subframe.

公开(公告)号：US09730203B2

公开(公告)日：2017-08-08

申请号：US14599841

申请日：2015-01-19

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：US09712293B2

公开(公告)日：2017-07-18

申请号：US13631093

申请日：2012-09-28

Applicant: Huawei Technologies Co., Ltd

Inventor： Fredrik Berggren ,  Jianghua Liu

IPC: H04W76/00 ,  H04L5/00 ,  H04W24/10 ,  H04W28/06 ,  H04W72/00 ,  H04W72/12

CPC classification number: H04L5/001 ,  H04L5/0057 ,  H04W24/10 ,  H04W28/06 ,  H04W72/00 ,  H04W72/12

Abstract: In a radio communication system, a number of downlink component carriers can be aggregated for communication between a network node and a User Equipment (UE). A set of downlink component carriers is determined from the number of downlink component carriers. A downlink control channel for the UE is arranged to include information being usable for identifying at least one downlink component carrier of the set of downlink component carriers. A channel quality report is to be provided for each one of the at least one identified downlink component carrier.

公开(公告)号：US20170163321A1

公开(公告)日：2017-06-08

申请号：US15439686

申请日：2017-02-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianguo Wang ,  Yongxing Zhou ,  Jianghua Liu

IPC: H04B7/0456 ,  H04B7/06

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.