METHOD FOR TRANSMITTING AND RECEIVING SIGNAL IN WIRELESS LAN SYSTEM, AND APPARATUS THEREFOR

WIPO Patent Application WO/2019/212152

A1

A method and apparatus for transmitting a feedback frame in a wireless LAN system are provided. In detail, a first STA generates a feedback frame on the basis of MU-MIMO beamforming. The first STA transmits the feedback frame to a second STA. The feedback frame includes information related to a feedback sub-carrier regarding a pre-set frequency band, and a beamforming report field for MU-MIMO beamforming. The feedback sub-carrier includes a first sub-carrier transmitted first in the feedback sub-carrier and a second sub-carrier for determining a sub-carrier index on the basis of a grouping value related to a sub-carrier interval. The beamforming report field includes a first SNR of the first sub-carrier and a first differential SNR of the second sub-carrier. The first differential SNR is a SNR difference between sub-carriers adjacent to each other included in the feedback sub-carrier.

YUN SUNWOONG (KR)
KIM JINMIN (KR)
PARK SUNGJIN (KR)
CHOI JINSOO (KR)

PCT/KR2019/003883

November 07, 2019

April 02, 2019

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LG ELECTRONICS INC (KR)

H04B7/0417; H04B7/0452; H04B7/06

WO2017030295A1

2017-02-23

US20170111924A1	2017-04-20
US20140098701A1	2014-04-10

HUANG, LEI ET AL.: "Comment Resolution on MIMO BF misc", IEEE P802.11 WIRELESS LANS IEEE 802.11-18/0610R1, 4 April 2018 (2018-04-04), XP009517435
OTERI, KOME ET AL.: "Hybrid Beamforming Feedback in 802.11ay", IEEE 802.11-18/0192R1, vol. 802.11ay, no. 1, 16 January 2018 (2018-01-16), pages 1 - 13, XP068122972

ENVISION PATENT & LAW FIRM (KR)

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