Patent ID: 8619690

Claim:
A cellular radio communication system comprising a radio base station apparatus for making any one of a space multiplex transmission and a beam form transmission using a plurality of antennas and a plurality of radio terminal units, each radio base station apparatus, (i) separating communicable frequency band in the cellular radio communication system to: a first frequency band assigned to the radio terminal unit in the cell center, and a second frequency band assigned to the radio terminal unit on the cell edge; (ii) further using properly the second frequency band by separating to: a beam form transmission of sending the same signal with an array weight multiplied to the plurality of radio terminal units from at least two or more antennas, and multiplex transmission of sending a different or independent signal from each of at least two or more antennas to the same radio terminal unit or the plurality of radio terminal units; wherein each radio base station apparatus specifies the information of frequency bands and transmission method in accordance with a state of each radio terminal unit; and wherein the radio base station apparatus or the radio terminal unit changes a report content of communication quality information from the radio terminal unit, depending on the specified frequency band and the specified transmission method.