RADIO TRANSMISSION DEVICE AND RADIO COMMUNICATION EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To simultaneously transmit data to a plurality of terminals with one slot and to improve transmission efficiency by hierarchizing data and hierarchy-multiplexing/transmitting data through the use of a hierarchy modulation system when data is transmitted to a plurality of radio terminals from the radio base station by a TDMA system. SOLUTION: Whenever a radio transmission/reception part 12 receives a signal from a radio terminal, a reception level measurement part 13 measures a signal level and stores it in a terminal information storage part 16 with transmission source terminal information taken in a demodulation circuit 17. On the other hand, transmission data to the radio terminal is once accumulated in a transmission buffer 18 and a buffer control part 19 decides the hierarchizing of output data based on terminal information of the terminal information storage part 16. Transmission data is sent from the transmission buffer 18 to a hierarchy modulation circuit 15. Resistance against noise is improved by allocating data to the hierarchy of the signal of high quality in order from the smallest reception level. Hierarchy is modulated and the radio transmission/reception part 12 transmits data as a transmission frequency. Thus, transmission success probability is improved and transmission efficiency is improved.