METHOD FOR FEEDING BACK CHANNEL STATE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME

WIPO Patent Application WO/2017/030295

A1

A sounding method of a station (STA) for transmitting feedback information relating to a downlink (DL) channel state in a wireless LAN (WLAN) system, according to one embodiment of the present invention, comprises the steps of: receiving an NDP announcement (NDPA) frame notifying a transmission of a null data packet (NDP) frame; receiving the NDP frame; receiving a trigger frame including resource allocation information on a resource allocated to the STA; generating feedback information; and transmitting a feedback frame including the feedback information by means of uplink (UL) multi-user (MU) transmission using a frequency resource indicated by the resource allocation information, wherein the feedback information may be generated in units of frequency granularity with respect to a transmission bandwidth that is equal to or smaller than the transmission bandwidth of the NDP frame.

CHUN JINYOUNG (KR)
RYU KISEON (KR)
KIM JEONGKI (KR)
CHOI JINSOO (KR)
LIM DONGGUK (KR)
CHO HANGYU (KR)
KIM JINMIN (KR)
PARK EUNSUNG (KR)

PCT/KR2016/008135

February 23, 2017

July 26, 2016

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LG ELECTRONICS INC (KR)

H04L1/16; H04L1/00; H04L27/26; H04W4/70

WO2015068968A1	2015-05-14
WO2015006637A1	2015-01-15

US20150131517A1	2015-05-14
US20150146807A1	2015-05-28

SEOK, YONGHO ET AL.: "Beamformed HE PPDU''.", IEEE 802.11-15/0597R1, 13 May 2015 (2015-05-13), pages 1 - 13, XP068094463

ROYAL PATENT & LAW OFFICE (KR)

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