| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reference signal transmission method, a mobile terminal device and a base station device that are capable of restricting an influence to a PDCCH even in a case of controlling transmission of a aperiodic SRS. <P>SOLUTION: Downlink control information corresponding to each component carrier to which transmission control information of SRS has benn set is transmitted to a mobile terminal device performing radio communication in a system band including plural component carriers, with the downlink control information collectively assigned to a downlink control channel of a specific component carrier. In a case where a mobile terminal device controls transmission of the SRS based on the transmission control information for the SRS included in the received downlink control information, the downlink control information corresponding to each component carrier includes a bit field to which identifier information of the component carrier is set, and the transmission control information for the SRS is set to the bit field. <P>COPYRIGHT: (C)2012,JPO&INPIT |
