Patent ID: 8767643

Claim:
A mobile station configured to receive downlink data transmitted from a radio base station by using a downlink radio resource assigned to the mobile station by predetermined scheduling information, in a predetermined cycle, the mobile station comprising: a receiver unit configured to receive the predetermined cycle from the radio base station; and a communication unit configured to receive downlink data in the predetermined cycle by using the downlink radio resource assigned by the predetermined scheduling information, wherein the start of the reception is determined by the mobile station on the basis of the predetermined scheduling information received from the radio base station, and wherein the communication unit is configured to receive the downlink data, when information notified by the predetermined scheduling information is in compliance with a pre-specified range for the predetermined scheduling information, wherein compliance is determined by detecting the downlink control information (DCI) format of the predetermined scheduling information and interpreting a field in the downlink data according to the detected DCI format, and the pre-specified range is received at the mobile station from the base station by a Radio Resource Control (RRC) message.