OFDM 셀룰러 시스템에서의 셀 탐색 방법, 순방향 링크 프레임 전송 방법 및 이를 이용하는 장치 및 순방향 링크 프레임 구조
김일규, 김영훈, 장갑석, 김남일, 방승찬, 박형근
- 8411552 (2013.04.02)
06MM1400, 3G Evolution 무선전송 기술 개발,
- Provided are a cell search method, a frame transmission method thereof, and a forward link frame structure thereof. The cell search method used by a terminal to search a target cell using reception signals received from a plurality of base stations, each base station transmitting a frame of its cell, in an Orthogonal Frequency-Division Multiplexing (OFDM) cellular system comprising a plurality cells to which a cell-specific scrambling code is assigned includes: detecting a hopping pattern of the target cell using reception sync channel symbols, which are signals corresponding to sync channel symbol positions of the reception signals, wherein the frame of each cell comprises M sync channel symbols code-hopped according to a hopping pattern of the cell, where M is a natural number equal to or greater than 2, each hopping pattern containing M sync channel code sequences and respectively corresponding to each code group to which a scrambling code of each cell belongs, and an arbitrary hopping pattern used in the OFDM cellular system differs from a cyclically shifted result of the hopping pattern, other hopping patterns, or cyclically shifted results of the other hopping patterns; and detecting a code group of the target cell based on the detected hopping pattern. Accordingly, a cell search time and the complexity of the cell search can be reduced.
- KSP 제안 키워드
- Cell search, Cell-specific, Cellular system, Channel code, Forward link, Frame structure, Frequency division multiplexing, Orthogonal frequency division Multiplexing(OFDM), Orthogonal frequency-division multiplexing (ofdm), Search time, base station(BS), division multiplexing, search method, transmission method