Patent ID: 7885225

Claim:
A transmission control method, characterized in that a wireless base station, which transmits a data packet to a plurality of mobile stations sending communication quality information through an uplink individual channel of a wireless line, through a downlink shared channel carries out: a step of determining a first allocation power of the downlink shared channel using a first transmission power margin; a step of determining a second allocation power of the downlink shared channel using a second transmission power margin smaller than the first transmission power margin; a step of relating a first transmission format, which is a transmission format for transmitting the data packet using the first allocation power as well as applying a phase modulation or a phase-amplitude modulation to the data packet according to the first allocation power, to the mobile stations; a step of relating a second transmission format, which is a transmission format for transmitting the data packet using the second allocation power as well as applying only the phase modulation to the data packet, to the mobile stations; and a step of comparing a total number of transport bits to be transmitted by the first transmission format with a total number of transport bits to be transmitted by the second transmission format and transmitting the data packet by a transmission format corresponding to a larger value of the total numbers.