Patent ID: 8649344

Claim:
A method of coordinating precoding matrixes by a first base station in a cell in a wireless communication system, the method comprising: receiving precoding matrix index (PMI) restriction/recommendation information from a user equipment (UE) in the cell, wherein the PMI restriction/recommendation information indicates that at least one PMI is not used or is used by a second base station in a neighbor cell; generating PMI scheduling information based on the PMI restriction/recommendation information, wherein the PMI scheduling information indicates at least one time resource where the at least one PMI is not used or is used by the second base station in the neighbor cell; transmitting the PMI restriction/recommendation information and the PMI scheduling information to the second base station in the neighbor cell; and receiving feedback information from the second base station, wherein the feedback information indicates whether or not the second base station will use the PMI restriction/recommendation information and the PMI scheduling information in the neighbor cell.