Patent ID: 8718035

Claim:
A method for implementing MIMO transmission in a base station device of a wireless communication system, wherein each cell of said wireless communication system comprises at least one sector, each of which is configured with one base station device, the method comprising: a. determining a first sector cooperation group used by said base station device in a first frequency band, wherein said first sector cooperation group comprises the sector dominated by said base station device and one or more adjacent sectors of said sector; b. implementing MIMO transmission in said first frequency band, by: cooperating with adjacent base station devices configured to said one or more adjacent sectors of said first sector cooperation group, for a mobile station in signal overlapping coverage area of each sector of said first sector cooperation group; receiving a user interference report from a mobile station, in signal overlapping coverage area of each sector of said first sector cooperation group, served by said base station device, and if said user interference report indicates that the ratio of interference power of said one or more sectors in said first sector cooperation group received by said mobile station to signal power received by said mobile station from said base station device is higher than a predetermined value, sending a request to said adjacent base station devices configured to said one or more adjacent sectors, for requesting cooperation with said base station device to implement MIMO transmission for said mobile station.