COMMUNICATION TERMINAL APPARATUS AND WIRELESS TRANSMISSION METHOD

摘要

A communication terminal apparatus that exhibits a shorter time periodrequired until a start of communication and causes the throughput in thewireless communication system to be less reduced. In this apparatus, when thenumber, N, of retransmissions notified by a response determining part (107) iszero, a subchannel-to-be-used selecting part (108) selects a subchannel, amongothers, which exhibits the highest order one of the reception qualities of thesubchannels notified by a reception quality determining part (106), and thennotifies the selected subchannel to a subchannel allocating part (113). Whenthe notified number, N, of retransmissions is one or more, the responsedetermining part (107) selects a subchannel which exhibits the N-th lowerorder reception quality than the highest order reception quality, based on thereception qualities of the subchannels notified by the reception qualitydetermining part (106) for a pilot signal received after a transmission of thelatest access request signal, and then notifies the selected subchannel to thesubchannel allocating part (113).