Patent ID: 8670767

Claim:
A radio base station apparatus comprising: a plurality of transmission/reception units which are remotely installed in a service area and to which a required number of carriers and a required number of sectors are assigned in accordance with installed areas; a modulation/demodulation unit configured to modulate and demodulate a signal transmitted to and received from each of the transmission/reception units; and a selector switch, connected via a cable to each of the transmission/reception units remotely installed in the service area, configured to switch connections between the modulation/demodulation unit and the transmission/reception units, wherein the service area is managed as a group of management units, each of the management units being identified by combination of a sector number of each of the sectors and a carrier number of a carrier assigned to the sector, and in softer handover, the modulation/demodulation unit is configured to modify predetermined management units according to a softer handover enabled range.