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1. (WO2014178615) METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2014/178615    International Application No.:    PCT/KR2014/003795
Publication Date: 06.11.2014 International Filing Date: 29.04.2014
IPC:
H04B 7/26 (2006.01), H04B 7/04 (2006.01)
Applicants: LG ELECTRONICS INC. [KR/KR]; 128, Yeoui-daero Yeongdeungpo-gu Seoul 150-721 (KR)
Inventors: KIM, Hyungtae; (KR).
PARK, Hanjun; (KR).
KIM, Kijun; (KR).
LEE, Hyunho; (KR).
YUM, Kunil; (KR)
Agent: KIM, Yong In; KBK & Associates 7th Floor 82, Olympic-ro Songpa-ku Seoul 138-861 (KR)
Priority Data:
61/817,270 29.04.2013 US
61/821,192 08.05.2013 US
61/823,926 16.05.2013 US
61/831,117 04.06.2013 US
Title (EN) METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM
(FR) PROCÉDÉ ET APPAREIL DESTINÉS À LA TRANSMISSION D'INFORMATIONS D'ÉTAT DE CANAL DANS UN SYSTÈME DE COMMUNICATION SANS FIL
(KO) 무선 통신 시스템에서 채널상태정보 전송 방법 및 장치
Abstract: front page image
(EN)The present invention relates to a wireless communication system. According to one embodiment of the present invention, a method for transmitting, by a terminal, channel state information (CSI) in a wireless communication system comprises the steps of: subsampling a code book for four antenna ports, including sixteen precoding matrixes; and feeding back the CSI on the basis of the subsampled code book, wherein the CSI includes at least one of a rank indicator (RI), a precoding matrix indicator (PMI) and a channel quality indicator (CQI), and if the RI is 3, the subsampled code book can be determined so as to minimize a chordal distance between subsampled code words.
(FR)La présente invention concerne un système de communication sans fil. Selon un mode de réalisation de la présente invention, un procédé permettant de transmettre, par un terminal, des informations d'état de canal (CSI) dans un système de communication sans fil comprend les étapes consistant à : sous-échantillonner un livre de codes pour quatre ports d'antenne, comprenant seize matrices de précodage ; et retourner les CSI sur la base du livre de codes sous-échantillonné, les CSI incluant au moins un indicateur parmi un indicateur de classement (RI), un indicateur de matrice de précodage (PMI) ainsi qu'un indicateur de qualité de canal (CQI). Si le RI est égal à 3, le livre de codes sous-échantillonné peut être déterminé de manière à réduire au minimum la distance à la corde entre les mots de code sous-échantillonnés.
(KO)본 발명은 무선 통신 시스템에 에 관한 것이다. 본 발명의 일 실시예에 따른 무선 통신 시스템에서 단말이 채널상태정보(Channel State Information, CSI)를 전송하는 방법은 16개의 프리코딩 행렬을 포함하는 4 안테나 포트를 위한 코드북을 서브샘플링(subsampling)하는 단계; 및 서브샘플링된 코드북을 기초로 CSI를 피드백하는 단계를 포함하되, CSI는 랭크 지시자(Rank Indicator, RI), 프리코딩 행렬 지시자(Precoding Matrix Indicator, PMI) 및 채널 품질 지시자(Channel Quality Indicator, CQI) 중 적어도 하나를 포함하고, RI가 3인 경우, 서브샘플링된 코드북은 서브샘플링된 코드워드 사이의 코달 거리(chordal distance)가 최소가 되도록 결정될 수 있다.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG).
Publication Language: Korean (KO)
Filing Language: Korean (KO)