Patent ID: 8554241

Claim:
A method for reducing an inter-cell interference (ICI) by a mobile station in a multi-cell environment, the method comprising: selecting one or more rank-1 PMIs which act as the strongest or weakest interference for at least one neighboring base station from a rank-1 base codebook; and transmitting the one or more rank-1 PMIs to a serving base station, wherein the one or more rank-1 PMIs are transferred from the serving base station to the at least one neighboring base station, wherein a precoding matrix for is determined based on the one or more rank-1 PMIs by the at least one neighboring base station, wherein the one or more rank-1 PMIs which act as the strongest interference are used for restricting the one or more rank-1 PMIs in the rank-1 base codebook, when the precoding matrix is determined by the at least one neighboring base station, wherein the one or more rank-1 PMIs which act as the weakest interference are used for recommending the one or more rank-1 PMIs in the rank-1 base codebook, when the precoding matrix is determined by the at least one neighboring base station.