Patent ID: 8532647

Claim:
A communication method of a macro base station, the communication method comprising: obtaining information associated with a first small effective channel formed between a first small terminal corresponding to a first small base station and a macro base station; obtaining information associated with a second small effective channel formed between a second small terminal corresponding to a second small base station and the macro base station; and determining a transmit beamforming vector of the macro base station based on information associated with the first small effective channel and information associated with the second small effective channel, wherein a receive beamforming vector of each of the at least one macro terminal is determined based on the transmit beamforming vector of the first small base station and the transmit beamforming vector of the second small base station; wherein determining the transmit beamforming vector of the macro base station based on information associated with the first small effective channel and information associated with the second small effective channel, such that interference from the macro base station is nulled in each of the first small terminal and the second small terminal.