Patent ID: 8817770

Claim:
A method of searching a cell in a mobile station of a wireless communication system, the method comprising: receiving a frame including a first and a second primary synchronization channel (PSCH) and a first and a second secondary synchronization channel (SSCH); and extracting a cell group identifier to which the mobile station belongs using at least one of a first code sequence in the first SSCH and a second code sequence in the second SSCH, wherein the first code sequence is different from the second code sequence, the wireless communication system uses N G ×2 sequences for SSCH which are classified into former N G sequences and latter N G sequences, the first code sequence from the former N G sequences corresponds to the cell group identifier, and the second code sequence from the latter N G sequences corresponds to the cell group identifier, and the first PSCH and the first SSCH are formed based on time division multiplexing and placed just adjacent to each other in the frame, and the second PSCH and the second SSCH are formed based on time division multiplexing and placed just adjacent to each other in the frame.