Mobile station apparatus and receiving method

摘要

A mobile station apparatus is provided that performs receive processing efficiently and reduces unnecessary power consumption. In this mobile station apparatus, a signaling detector ( 71 ) detects a compressed mode gap period in an uplink channel, that is, a period in which no uplink signal is transmitted to a base station, and reports this period to a controller ( 72 ). If the period detected in the signaling detector ( 71 ) contains transmission timing of an ACK/NACK signal, the controller ( 72 ) controls an HS-PDSCH receive processor ( 40 ) to stop the receive processing of the packet data corresponding to the ACK/NACK signal.