WO2012169745A3 - 무선랜 시스템에서 채널 측정 방법 및 장치 - Google Patents

무선랜 시스템에서 채널 측정 방법 및 장치 Download PDF

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Publication number
WO2012169745A3
WO2012169745A3 PCT/KR2012/004335 KR2012004335W WO2012169745A3 WO 2012169745 A3 WO2012169745 A3 WO 2012169745A3 KR 2012004335 W KR2012004335 W KR 2012004335W WO 2012169745 A3 WO2012169745 A3 WO 2012169745A3
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WO
WIPO (PCT)
Prior art keywords
wireless lan
lan system
channel measurement
lcsi
receives
Prior art date
Application number
PCT/KR2012/004335
Other languages
English (en)
French (fr)
Other versions
WO2012169745A2 (ko
Inventor
손일수
최성현
유승민
이혜원
최문환
석용호
이옥환
Original Assignee
엘지전자 주식회사
서울대학교산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사, 서울대학교산학협력단 filed Critical 엘지전자 주식회사
Priority to US14/124,584 priority Critical patent/US9369895B2/en
Publication of WO2012169745A2 publication Critical patent/WO2012169745A2/ko
Publication of WO2012169745A3 publication Critical patent/WO2012169745A3/ko

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0634—Antenna weights or vector/matrix coefficients
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0645—Variable feedback
    • H04B7/065—Variable contents, e.g. long-term or short-short

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

무선랜 시스템에서 의한 채널 측정 방법 및 장치가 제공된다. 스테이션(STA; station)은 접속 지점(AP; access point)으로부터 복수의 사운딩 프레임(sounding frame)들을 수신하고, 상기 복수의 사운딩 프레임들을 추정하여 장기 채널 상태 정보(LCSI; long-term channel state information)을 생성하고, 상기 생성된 장기 채널 상태 정보를 상기 AP로 피드백 하고, 상기 장기 채널 상태 정보를 기반으로 결정된 그룹 ID(identifier)에 관한 정보를 포함하는 그룹 ID 관리 프레임(group ID management frame)을 상기 AP로부터 수신한다.
PCT/KR2012/004335 2011-06-07 2012-06-01 무선랜 시스템에서 채널 측정 방법 및 장치 WO2012169745A2 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/124,584 US9369895B2 (en) 2011-06-07 2012-06-01 Method and device for channel measurement in a wireless LAN system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161494394P 2011-06-07 2011-06-07
US61/494,394 2011-06-07

Publications (2)

Publication Number Publication Date
WO2012169745A2 WO2012169745A2 (ko) 2012-12-13
WO2012169745A3 true WO2012169745A3 (ko) 2013-03-07

Family

ID=47296563

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2012/004335 WO2012169745A2 (ko) 2011-06-07 2012-06-01 무선랜 시스템에서 채널 측정 방법 및 장치

Country Status (2)

Country Link
US (1) US9369895B2 (ko)
WO (1) WO2012169745A2 (ko)

Families Citing this family (13)

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Publication number Priority date Publication date Assignee Title
US9226302B2 (en) * 2012-08-24 2015-12-29 Huawei Technologies Co., Ltd. Systems and methods for interference alignment in Wi-Fi
US9991940B2 (en) 2013-09-10 2018-06-05 Qualcomm Incorporated Multi-user multiple-input multiple-output (MU-MIMO) feedback protocol
US9078153B1 (en) * 2014-10-31 2015-07-07 Quantenna Communications, Inc. Wireless local area network with spatial diagnostics
US9992789B1 (en) * 2015-04-21 2018-06-05 Mediatek Inc. Sounding method and wireless communication system
US20170086061A1 (en) * 2015-09-22 2017-03-23 Qualcomm Incorporated Dynamic assignment of stations to multi-user group identifiers
US10616783B2 (en) 2016-05-10 2020-04-07 Samsung Electronics Co., Ltd Device grouping based on reported channel information and communication performance
KR102665974B1 (ko) * 2016-05-10 2024-05-16 삼성전자주식회사 송신 장치 및 그의 데이터 전송 방법
US10348379B2 (en) * 2016-07-21 2019-07-09 Symbol Technologies, Llc Systems, devices and methods for providing communications between a beamforming access point and a non-beamforming device
US11343696B2 (en) 2017-02-28 2022-05-24 Intel Corporation Apparatus, system and method of ranging measurement with secure long training field (LTF)
US20190281608A1 (en) * 2018-03-09 2019-09-12 Qualcomm Incorporated Multiple access point channel planning
BR112019028056A2 (pt) 2018-05-02 2020-07-14 Lg Electronics Inc. método para transmitir e receber sinais em sistema lan sem fio, e aparelhos do mesmo
EP3769441A1 (en) 2018-05-04 2021-01-27 Semiconductor Components Industries, LLC Beamformer solicited sounding
US11552828B2 (en) 2018-05-04 2023-01-10 Semiconductor Components Industries, Llc Beamformer solicited sounding

Citations (3)

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US20050037718A1 (en) * 2003-05-15 2005-02-17 Kim Sung-Jin Device and method for transmitting and receiving data by a transmit diversity scheme using multiple antennas in a mobile communication system
US20070223423A1 (en) * 2006-03-20 2007-09-27 Byoung-Hoon Kim Grouping of users for mimo transmission in a wireless communication system
US20110026429A1 (en) * 2008-04-11 2011-02-03 Telefonaktiebolaget Lm Ericsson (Publ) Network Coded Data Communication

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KR20090030200A (ko) * 2007-09-19 2009-03-24 엘지전자 주식회사 위상천이 기반의 프리코딩을 이용한 데이터 송수신 방법 및이를 지원하는 송수신기
US8594688B2 (en) * 2009-12-09 2013-11-26 Qualcomm Incorporated Method and system for rate prediction in coordinated multi-point transmission
EP2567467A2 (en) * 2010-05-04 2013-03-13 Celeno Communications Ltd. System and method for channel state related feedback in multi-user multiple-input-multiple-output systems

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US20050037718A1 (en) * 2003-05-15 2005-02-17 Kim Sung-Jin Device and method for transmitting and receiving data by a transmit diversity scheme using multiple antennas in a mobile communication system
US20070223423A1 (en) * 2006-03-20 2007-09-27 Byoung-Hoon Kim Grouping of users for mimo transmission in a wireless communication system
US20110026429A1 (en) * 2008-04-11 2011-02-03 Telefonaktiebolaget Lm Ericsson (Publ) Network Coded Data Communication

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
WO2012169745A2 (ko) 2012-12-13
US20140098701A1 (en) 2014-04-10
US9369895B2 (en) 2016-06-14

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