Patent ID: 7436800

Claim:
A radio base station controller which is remotely connected to a plurality of base stations arranged along a road and controls an antenna installed in each of the plurality of base stations and composed of a plurality of antenna devices in order to carry out a radio communication with mobile stations running on the road, the radio base station controller comprising: (a) an antenna controller configured to select at least one of the plurality of antenna devices from the plurality of base stations and set a weight of the at least one of the plurality of antenna devices to prevent interference between beam patterns generated by the plurality of antenna devices; (b) at least one modulating/demodulating device configured to modulate a signal which is transmitted to and demodulate a signal received from the mobile stations via the plurality of base stations, wherein the base stations do not modulate or demodulate the signals; (c) a device configured to detect each speed and each lane of the mobile stations; (d) a device configured to assign a channel to a group of the mobile stations running on same lane of the road; and (e) a device configured to change the channel in accordance with a change of the lane.