公开(公告)号：US20160013847A1

公开(公告)日：2016-01-14

申请号：US14865654

申请日：2015-09-25

Applicant: LG ELECTRONICS INC.

Inventor： Jinmin KIM ,  Sunam KIM ,  Binchul IHM ,  Hyukmin SON ,  Jaehoon CHUNG

IPC: H04B7/04

CPC classification number: H04B7/0456 ,  H04B7/0408 ,  H04B7/0417 ,  H04B7/061 ,  H04B7/0617 ,  H04B7/0639 ,  H04B7/0695 ,  H04W16/28

Abstract: A method for performing hierarchical beamforming in a wireless access system and a device therefor are disclosed. Particularly, the method comprises: an initial step for allowing a base station to transmit a plurality of first beams, to which different steering vectors are applied, to a terminal through corresponding reference signals, and a repetition step for allowing the base station to transmit a plurality of second beams, to which different steering vectors are applied, to the terminal through corresponding reference signals by considering feedback information that contains an index of one or more beams received from the terminal, wherein the repetition step can be repeated up to a predetermined number of times.

公开(公告)号：US20150222341A1

公开(公告)日：2015-08-06

申请号：US14688882

申请日：2015-04-16

Applicant: LG ELECTRONICS INC.

Inventor： Hyunsoo KO ,  Sunam KIM ,  Dongguk LIM ,  Moonil LEE ,  Jaehoon CHUNG

IPC: H04B7/04 ,  H04L5/00

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/10 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/0028 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0057 ,  H04L5/006 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03808 ,  H04W48/08 ,  H04W72/00 ,  H04W72/0413 ,  H04W72/0446

Abstract: A method for transmitting channel status information (CSI) via uplink in a wireless communication system includes transmitting a first precoding matrix indicator (PMI) and a second PMI at a subframe. A subsampled codebook for each of a precoding codebook for Rank-1 and a precoding codebook for Rank-2 is determined based on at least the first PMI or the second PMI. In case of the Rank-1 or the Rank-2, a number of elements for the first PMI is 8.

Abstract translation: 一种用于在无线通信系统中经由上行链路发送信道状态信息（CSI）的方法包括在子帧处发送第一预编码矩阵指示符（PMI）和第二PMI。 基于至少第一PMI或第二PMI来确定用于Rank-1的预编码码本和用于Rank-2的预编码码本中的每一个的子采样码本。 在Rank-1或Rank-2的情况下，第一个PMI的元素数量为8个。

公开(公告)号：US20150063267A1

公开(公告)日：2015-03-05

申请号：US14528728

申请日：2014-10-30

Applicant: LG ELECTRONICS INC.

Inventor： Hyunsoo KO ,  Sunam KIM ,  Dongguk LIM ,  Moonil LEE ,  Jaehoon CHUNG

IPC: H04B7/06 ,  H04L5/00 ,  H04L1/00

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/10 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/0028 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0057 ,  H04L5/006 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03808 ,  H04W48/08 ,  H04W72/00 ,  H04W72/0413 ,  H04W72/0446

Abstract: A method for transmitting channel status information (CSI) of downlink transmission via uplink in a wireless communication system includes transmitting a rank indicator (RI) and a precoder type indicator (PTI) at a first subframe, transmitting at a second subframe a first precoding matrix indicator (PMI) when the PTI has a first value and transmitting a second PMI and a wideband channel quality indicator (WB CQI) when the PTI has a second value, and transmitting at a third subframe a second PMI and a WB CQI when the PTI has a first value and transmitting a subband (SB) CQI and a second PMI when the PTI has a second value. A user equipment (UE) preferred precoding matrix is indicated by a combination of the first PMI and the second PMI. Subsampled codebooks of precoding codebooks of individual Rank-2, Rank-3 and Rank-4 are applied to the second PMI.

Abstract translation: 一种用于在无线通信系统中经由上行链路传输下行链路传输的信道状态信息（CSI）的方法，包括在第一子帧处发送秩指示符（RI）和预编码器类型指示符（PTI），在第二子帧处发送第一预编码矩阵 当PTI具有第一值并且当PTI具有第二值时发送第二PMI和宽带信道质量指示符（WB CQI）时，当PTI具有第一值并且当PTI发送时，在第三子帧发送第二PMI和WB CQI，指示符（PMI） 具有第一值并且当PTI具有第二值时发送子带（SB）CQI和第二PMI。 用户设备（UE）优选预编码矩阵由第一PMI和第二PMI的组合指示。 个别Rank-2，Rank-3和Rank-4的预编码码本的二次采样码本应用于第二PMI。