| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable an effective use of a radio resource used for transmitting an SRS by appropriately reporting transmission timing of the SRS and an SRS parameter to a mobile terminal device when applying an aperiodic SRS. <P>SOLUTION: A mobile terminal device includes: a reception part for receiving, via a down control channel, bit information instructing no triggering of an aperiodic SRS and specific bit information selected from among plural pieces of bit information respectively instructing transmission of an aperiodic SRS using a predefined default SRS; and an SRS transmission setup part for controlling transmission timing of an aperiodic SRS on the basis of the specific bit information and controlling transmission timing of a periodic SRS at a predefined period. Further, if the transmission timing of an aperiodic SRS and that of a periodic SRS overlap in the same sub-frame, the SRS transmission setup part gives priority to the transmission of the aperiodic SRS and does not transmits the periodic SRS. <P>COPYRIGHT: (C)2012,JPO&INPIT |
