Terminal, communication method, base station, and system for controlling transmission of uplink shared channel

A radio communication method for a terminal, comprising:

• receiving downlink control information (DCI);
• and
• controlling transmission of an uplink (UL) shared channel that is scheduled by the,
• wherein the terminal controls a timing for the transmission of the UL shared channel based on a reference value, the reference value being indicated by both the DCI and information provided through higher layer signaling, and
• wherein the terminal controls the transmission of the UL shared channel in response to information included in the DCI that indicates whether the UL shared channel comprises initially transmitted data.

A base station comprising:

• a transmitter that transmits downlink control information (DCI);
• and
• a processor that controls reception of an uplink (UL) shared channel that is scheduled by the DCI,
• wherein the processor indicates a timing for transmission of the UL shared channel by using a reference value, the reference value being indicated by both the DCI and information provided through higher layer signaling, and
• wherein the processor indicates the transmission of the UL shared channel by using information included in the DCI that indicates whether the UL shared channel comprises initially transmitted data.

A system comprising a base station and a terminal, wherein

• the base station comprises:
• a transmitter that transmits downlink control information (DCI);
• and
• a processor of the base station that controls reception of an uplink (UL) shared channel that is scheduled by the DCI, and
• the terminal comprises:
• a receiver that receives the DCI;
• and
• a processor of the terminal that controls transmission of the UL shared channel,
• wherein the processor of the terminal controls a timing for the transmission of the UL shared channel based on a reference value, the reference value being indicated by both the DCI and information provided through higher layer signaling, and
• wherein the processor of the terminal controls the transmission of the UL shared channel in response to information included in the DCI that indicates whether the UL shared channel comprises initially transmitted data.