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1. (WO2010032955) SYNCHRONIZATION METHOD OF FEMTOCELL BASE STATION AND FEMTOCELL BASE STATION USING THE SAME
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2010/032955    International Application No.:    PCT/KR2009/005266
Publication Date: 25.03.2010 International Filing Date: 16.09.2009
IPC:
H04B 7/155 (2006.01)
Applicants: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY [KR/KR]; 134 Shinchon-dong, Seodaemun-gu Seoul 120-749 (KR) (For All Designated States Except US).
KIM, Kwang Soon [KR/KR]; (KR) (For US Only).
SANG, Young Jin [KR/KR]; (KR) (For US Only)
Inventors: KIM, Kwang Soon; (KR).
SANG, Young Jin; (KR)
Agent: WOOIN PATENT & LAW FIRM; third Floor, Shinwon Building 648-15 Yeoksam-dong Gangnam-gu Seoul 135-911 (KR)
Priority Data:
10-2008-0092092 19.09.2008 KR
Title (EN) SYNCHRONIZATION METHOD OF FEMTOCELL BASE STATION AND FEMTOCELL BASE STATION USING THE SAME
(FR) PROCÉDÉ DE SYNCHRONISATION DE STATION DE BASE À FEMTOCELLULES ET STATION DE BASE À FEMTOCELLULES ASSOCIÉE
(KO) 펨토셀 기지국의 동기화 방법 및 이를 이용한 펨토셀 기지국
Abstract: front page image
(EN)The present invention relates to a synchronization method of a femtocell base station and a femtocell base station using the same. More specifically, the invention relates to a synchronization method of a femtocell base station and a femtocell base station using the same, wherein the femtocell base station, using a femtocell for an indoor or shadow area of an existing cell, receives a preamble signal and adjusts downlink synchronization based on the preamble signal; transmits a ranging signal to a macrocell base station and receives uplink synchronization information as a result of the transmission of the ranging signal so as to ensure the uplink synchronization of a terminal; and eliminates interference from an undesirable signal by maintaining orthogonality between subcarriers while using the same or different subcarriers of which the frequency band is the same as that of a macrocell. For this purpose, the invention provides a synchronization method of a femtocell base station which comprises the steps of: enabling the femtocell base station to adjust time synchronization to a preamble signal when the femtocell base station receives the preamble signal from a macrocell base station in an OFDMA (Orthogonal Frequency Division Multiple Access) communication system where the femtocell exists in a macrocell; and transmitting a symbol to a terminal which belongs to the femtocell in order to ensure the time synchronization of the femtocell base station.
(FR)L'invention concerne un procédé de synchronisation d'une station de base à femtocellules ainsi que ladite station de base à femtocellules. L'invention concerne, de manière plus spécifique, une station de base à femtocellules qui, au moyen d'une femtocellule dans un espace intérieur ou une fenêtre d'une cellule existante, reçoit un signal de préambule, puis ajuste la synchronisation descendante sur la base du signal de préambule. De plus, la station de base à femtocellules émet un signal de télémétrie vers une station de base à macrocellules et reçoit des informations de synchronisation montantes résultant de la transmission du signal de télémétrie, de sorte que la station de base à femtocellules peut assurer la synchronisation montante d'un terminal. Ainsi, le procédé de synchronisation de la station de base à femtocellules est capable d'éliminer les interférences d'un signal non souhaité grâce au maintien de l'orthogonalité entre les sous-porteuses, leur utilisation permettant la conservation de la même bande de fréquence que celle d'une macrocellule. A cet effet, l'invention concerne un procédé de synchronisation d'une station de base à femtocellules qui comprend les étapes suivantes consistant à: permettre à une station de base à femtocellules de régler la synchronisation temporelle avec un signal de préambule, lorsque la station de base à femtocellules reçoit le signal de préambule de la station de base à macrocellules dans un système de communications OFDMA (accès multiple par répartition orthogonale de la fréquence), dans lequel la femtocellule existe dans la macrocellule; et transmettre un symbole à un terminal, de manière à assurer la synchronisation temporelle de la station de base à femtocellule, le terminal appartenant à la femtocellule.
(KO)본 발명은 펨토셀 기지국의 동기화 방법 및 이를 이용한 펨토셀 기지국에 관한 것이다. 보다 상세하게는 실내 또는 기존 셀의 음영 지역을 위해 펨토셀을 도입하면서 펨토셀 기지국이 프리앰블 신호를 수신하고 이를 기준으로 하여 하향 링크 동기를 맞추고, 펨토셀 기지국이 매크로셀 기지국에 레인징 신호를 송신하고 그에 따라 상향 링크 동기 정보를 수신함으로써 단말의 상향 링크 동기를 확보하여, 매크로셀과 동일한 주파수 대역의 서로 다른 부반송파 또는 같은 부반송파를 사용하면서도 부반송파 간의 직교성을 유지하여 원치 않는 신호의 간섭을 배제할 수 있는 펨토셀 기지국의 동기화 방법 및 이를 이용한 펨토셀 기지국에 관한 것이다. 이를 위해 본 발명은 매크로셀 내에 펨토셀(Femtocell)이 존재하는 OFDMA(Orthogonal Frequency Division Multiple Access) 통신 시스템에서 펨토셀 기지국이 매크로셀 기지국으로부터 프리앰블(preamble) 신호를 수신하면, 상기 펨토셀 기지국이 상기 프리앰블 신호에 시간 동기를 맞추어서 상기 펨토셀에 속한 단말에 심볼을 송신함으로써 펨토셀 기지국의 시간 동기를 확보하는 펨토셀 기지국의 동기화 방법을 제공한다.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, 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, 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, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (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, 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)