BASE STATION DEVICE AND METHOD OF ADAPTIVE MODULATION

摘要

PROBLEM TO BE SOLVED: To improve a throughput of a radio communication system by transmitting a packet using a modulation encoding method always appropriate for line quality. SOLUTION: A radio receiving unit 104 receives a radio transmission signal including line quality information transmitted from a communication terminal device through a receive antenna 102 to carry out a prescribed radio receive process. A demodulation unit 106 demodulates the radio transmission signal treated in radio receive process to extract line quality information. A setting unit is made up of a line quality information memory unit 108, a determining unit 110, and an MCS deciding unit 112; and sets a modulation encoding method based on tow or more pieces of received line quality information. An adaptive modulating unit 114 carries out a prescribed adaptive modulating process to transmitting data to be transmitted to the communication terminal device using a set modulation encoding method. COPYRIGHT: (C)2005,JPO&NCIPI