Title:
INTERFERENCE AVOIDANCE METHOD AND APPARATUS FOR SUPPORTING SAME IN A WIRELESS LAN SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/083905
Kind Code:
A2
Abstract:
Provided are an interference avoidance method and apparatus which are performed by an access point (AP) in a wireless LAN system. The interference avoidance method according to the present invention comprises: transmitting a training request (TRQ) message for requesting the transmission of a sounding frame to a first station being a multi-user multiple input multiple output (MU-MIMO) transmission target, and a second station receiving data over a direct link during the MU-MIMO transmission; receiving first and second sounding frames that are transmitted by the first and second stations, respectively, in response to the TRQ message; estimating a channel with the first sound frame to determine a beam-forming vector to be used for the MU-MIMO transmission; and performing MU-MIMO transmission to MU-MIMO transmission target stations including the first station, wherein the beam-forming vector is determined in order to minimize the effect of the MU-MIMO transmission on the second station by reflecting channel information between the second station and the AP that has been obtained on the basis of the second sounding frame received from the second station.
Inventors:
SEOK YONG HO (KR)
NOH YU JIN (KR)
KIM BONG HOE (KR)
LEE DAE WON (KR)
NOH YU JIN (KR)
KIM BONG HOE (KR)
LEE DAE WON (KR)
Application Number:
PCT/KR2010/007751
Publication Date:
July 14, 2011
Filing Date:
November 04, 2010
Export Citation:
Assignee:
LG ELECTRONICS INC (KR)
SEOK YONG HO (KR)
NOH YU JIN (KR)
KIM BONG HOE (KR)
LEE DAE WON (KR)
SEOK YONG HO (KR)
NOH YU JIN (KR)
KIM BONG HOE (KR)
LEE DAE WON (KR)
International Classes:
H04B15/00; H04B7/04; H04W84/12
Foreign References:
| US20070286303A1 | 2007-12-13 | |||
| US20080014870A1 | 2008-01-17 | |||
| US20060067258A1 | 2006-03-30 |
Attorney, Agent or Firm:
YANG, Moon Ock (KR)
양문옥 (KR)
양문옥 (KR)
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Claims: