Patent ID: 11864191
Assignee: NTT DOCOMO, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A system comprising:
a terminal that comprises:
a receiving section that receives a downlink shared channel based on Downlink Control Information (DCI) format 1_0; and
a first control section that assumes, when a capability related to a density of a Phase Tracking Reference Signal (PTRS) is reported, that a PTRS for the downlink shared channel is not present or that a PTRS of a specific density for the downlink shared channel is present; and

a base station comprises:
a transmitting section that transmits, to the terminal, the DCI format 1_0; and
a second control section that controls, when the capability is reported from the terminal, not to transmit the PTRS or to transmit the PTRS of the specific density.