RADIO COMMUNICATION SYSTEM, MOBILE STATION DEVICE, BASE STATION DEVICE, AND RADIO COMMUNICATION METHOD IN THE RADIO COMMUNICATION SYSTEM

摘要

A radio communication system including: a base station apparatus; and a mobile station apparatus, the mobile station apparatus includes: a receiver which receives data signal transmitted from the base station apparatus; a controller which switches a unit of grouping to the data signal and groups the data signal, according to one parameter or a combination of a plurality of parameters out of a type of a channel, a type of modulation scheme and encoding rate, an assigned resource amount, or a number of transmitting antennas of the mobile station apparatus, when an ACK signal or an NACK signal to the data signal is transmitted; and a transmitter which transmits the ACK signal or the NACK signal in each the group, and the base station apparatus includes: a transmitter which transmits the data signal; and a receiver which receives the ACK signal or the NACK signal.