Patent ID: 11943766
Assignee: NTT DOCOMO, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A system comprising a base station and a terminal, wherein:
the base station comprises:
a transmitter that transmits a first downlink control information for use in scheduling a downlink shared channel, and a second downlink control information for use in triggering a channel state information (CSI) reference signal (CSI-RS); and
a first processor that, when the second downlink control information indicates a resource of the CSI-RS, performs a control so as not to use the resource of the CSI-RS for the downlink shared channel,
wherein the first processor configures, by a radio resource control (RRC) signaling, a plurality of candidates of the resource indicated by the second downlink control information, and
wherein the plurality of candidates each contains an index, the index corresponding to a code point of a bit field included in the second downlink control information, and the first processor indicates the resource by using the code point; and

the terminal comprises:
a receiver that receives the first downlink control information and the second downlink control information; and
a second processor that, when the resource of the CSI-RS is indicated by the second downlink control information, assumes that the resource of the CSI-RS is not used for the downlink shared channel.