MOBILE USER TERMINAL, MOBILE COMMUNICATION SYSTEM, BASE STATION, AND COMMUNICATION METHOD

摘要

A mobile user terminal, which transmits downlink channel quality information indicating downlink channel quality and an uplink pilot signal to a base station, whereby a carrier frequency used for transmitting the downlink quality information and a carrier frequency used for transmitting the uplink pilot signal are selectable respectively from among a plurality of carrier frequencies assigned to the mobile user terminal; the mobile user terminal includes a radio transmitter, which transmits the downlink quality information and the uplink pilot signal in an intermittent fashion to the base station; and the radio transmitter transmits the downlink quality information and the uplink pilot signal by using a same carrier frequency among the plurality of carrier frequencies or by using adjacent carrier frequencies among the plurality of carrier frequencies, in a period corresponding to a state of intermittent communicate.