Patent ID: 7200421

Claim:
A base station device comprising: a plurality of local oscillation units generating local frequency signals; a plurality of radio units using said local frequency signals as input for operation; a path switching switch arranged between said plurality of local oscillation units and said plurality of radio units for selecting connections between said local oscillation units and said radio units; a transmission/reception form switching control unit performing switching between a transmission/reception operation using the same frequency in all the plurality of radio units and a transmission/reception operation performed by dividing said plurality of radio units into a plurality of groups and using different frequencies in the respective groups; and a path switching control unit controlling said path switching switch to connect the one local oscillation unit to all the radio units when said transmission/reception form switching control unit performs the transmission and reception by all the radio units, and controlling the path switching switch to connect the different local oscillation units corresponding to the respective groups to the radio units, respectively, when said transmission/reception form switching control unit performs the transmission and reception by each of the groups.