MOBILE STATION, WIRELESS BASE STATION, AND MOBILE COMMUNICATION METHOD

摘要

System efficiency is achieved by avoiding inefficient resource allocation of the "carrier segment/extension carrier". A mobile station (UE) is provided with a control signal receiver (11) which receives from a wireless base station (eNB) a downlink control signal for notifying the transmission of downlink data, and a receiver (13) which receives downlink data in accordance with the received downlink control signal. The essential point is that the downlink control signal includes bits indicating the allocation or non-allocation of the "carrier segment/extension carrier" in addition to resource allocation information "RB assignment information" of a normal "component carrier".