Patent ID: 8428174

Claim:
A method for multiple-input-multiple-output (MIMO) collaborative communication in a wireless communication system, the wireless communication system including at least one user equipment and M base stations collaboratively communicating with the at least one user equipment, M being an integer greater than or equal to 2, said method comprising: performing the following processes with respect to each user equipment: performing a first level of MIMO pre-coding process for each base station, to acquire respective first level of pre-coding matrices corresponding to respective base stations; performing a second level to X-th level of MIMO pre-coding process sequentially to acquire second level to X-th level of pre-coding matrices of respective base stations, X being an integer greater than or equal to 2, wherein in the X-th level of MIMO pre-coding process, the M base stations is divided into Q (X) groups, and the X-th level of MIMO pre-coding is performed to the Q (X) groups of base stations on the basis of the acquired first level to (X−1)-th level of pre-coding matrices to acquire the X-th level of pre-coding matrix of each base station group in the Q (X) base station groups, Q (X) being an integer greater than or equal to 1 and smaller than or equal to M.