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1. (WO2013157790) METHOD FOR DOWNLINK BEAMFORMING IN WIRELESS ACCESS SYSTEM AND DEVICE THEREFOR
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2013/157790    International Application No.:    PCT/KR2013/003140
Publication Date: 24.10.2013 International Filing Date: 15.04.2013
IPC:
H04B 7/04 (2006.01), H04W 24/10 (2009.01)
Applicants: LG ELECTRONICS INC. [KR/KR]; 20 Yeouido-dong Yeongdeungpo-gu Seoul 150-721 (KR)
Inventors: KIM, Jinmin; (KR).
KIM, Sunam; (KR).
IHM, Binchul; (KR).
SON, Hyukmin; (KR).
PARK, Changhwan; (KR).
CHUNG, Jaehoon; (KR)
Agent: KIM, Yong In; KBK & Associates 7th Floor, Hyundae Building 175-9 Jamsil-dong Songpa-ku Seoul 138-861 (KR)
Priority Data:
61/635,867 20.04.2012 US
Title (EN) METHOD FOR DOWNLINK BEAMFORMING IN WIRELESS ACCESS SYSTEM AND DEVICE THEREFOR
(FR) PROCÉDÉ DE MISE EN FAISCEAU DE LIAISON DESCENDANTE DANS UN SYSTÈME D'ACCÈS SANS FIL ET DISPOSITIF AFFÉRENT
(KO) 무선 접속 시스템에서 하향링크 빔 포밍 방법 및 이를 위한 장치
Abstract: front page image
(EN)A method for downlink beamforming in a wireless access system and a device therefor are disclosed. Specifically, the method comprises the following steps: transmitting, by an eNB, a reference signal to a UE through only a first antenna set from among whole antennas; receiving, by the eNB, channel state information (CSI) for the first antenna set from the UE; and transmitting, by the eNB, beamforming a downlink channel by using a pre-coding matrix for the whole antennas, wherein CSI for a second antenna set by which the reference signal has not been transmitted from among the whole antennas is calculated using the CSI for the first antenna set.
(FR)L'invention concerne un procédé de mise en faisceau de liaison descendante dans un système d'accès sans fil et un dispositif afférent. Plus précisément, le procédé comprend les étapes suivantes : transmission par un nœud eNB d'un signal de référence (RS) à un UE par l'intermédiaire de seulement un premier ensemble d'antennes parmi la totalité des antennes ; réception par le nœud eNB d'informations d'état du canal (CSI) provenant de l'UE pour le premier ensemble d'antennes ; et transmission par le nœud eNB de la mise en faisceau d'un canal de liaison descendante au moyen d'une matrice de décodage pour la totalité des antennes, les informations CSI pour un second ensemble d'antennes de la totalité des antennes pour lequel le signal de référence n'a pas été transmis étant calculées au moyen des informations CSI pour le premier ensemble d'antennes.
(KO)본 발명에서는 무선 접속 시스템에서 하향링크 빔 포밍(beamforming)을 수행하는 방법 및 이를 위한 장치가 개시된다. 구체적으로, 기지국이 전체 안테나 중에서 제1 안테나 세트만을 통해 단말에게 참조 신호를 전송하는 단계, 기지국이 단말로부터 제1 안테나 세트에 대한 채널 상태 정보(CSI: Channel State Information)을 수신하는 단계 및 기지국이 전체 안테나에 대한 프리코딩 행렬을 이용하여 하향링크 채널을 빔포밍하여 단말에 전송하는 단계를 포함하고, 전체 안테나 중 참조 신호를 전송하지 않은 제2 안테나 세트에 대한 CSI 는 제1 안테나 세트에 대한 CSI를 이용하여 산출될 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, IS, JP, KE, KG, KM, 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, 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, ML, MR, NE, SN, TD, TG).
Publication Language: Korean (KO)
Filing Language: Korean (KO)