| 摘要 |
<P>PROBLEM TO BE SOLVED: To properly transmit/receive CSI-RSs even when the number of the CSI-RSs increases with increase in the number of antennas. <P>SOLUTION: A base station device (20) is configured to transmit CSI-RSs to a mobile terminal device (10A) which can receive CSI-RSs for measuring channel status from a plurality of antennas and a mobile terminal device (10B) which can receive the CSI-RSs from a smaller number of antennas than the mobile terminal device (10A). The base station device (20) comprises: a CSI-RS allocation part (211) for allocating to radio resources the CSI-RSs for the number of the antennas which the mobile terminal device (10A) is ready for; and a transmission/reception part for notifying the mobile terminal device (10A) of the resources to which the CSI-RSs are allocated, and notifying the mobile terminal device (10B) of the resources to which the CSI-RSs are allocated, with a part of resources as resources to be muted. <P>COPYRIGHT: (C)2013,JPO&INPIT |
