Patent ID: 8873514

Claim:
A method of a network device for determining a transmit antenna pattern in a mobile communication system, the method comprising: requesting a first base station to fix a plurality of transmit antenna patterns and requesting a second base station to change a plurality of transmit antenna patterns; determining first Signal to Interference and Noise Power Ratios (SINRs) of a first mobile station and a second mobile station based on first Channel Quality Indicator (CQI) values received from the first base station and the second base station; determining whether at least one of the plurality of transmit antenna patterns is an interference source for the second base station on the first SINRs; requesting the first base station to change the at least one of the plurality of transmit antenna patterns and requesting the second base station to fix the plurality of transmit antenna patterns; determining second SINRs of the first mobile station and the second mobile station based on second CQI values received from the first base station and the second base station; and determining the plurality of transmit antenna patterns exhibiting the best performance based on the determined first and second SINRs.