PUCCH timing for terminal apparatus, base station apparatus, and communication method in a wireless communication system

A base station apparatus in a wireless communication system, the base station apparatus comprising:

• a transmitter configured to transmit a physical downlink control channel (PDCCH) including a downlink control information (DCI) format;
• and
• a receiver configured to receive a physical uplink control channel (PUCCH), wherein in a case that the DCI format schedules a physical downlink shared channel (PDSCH) and that a last orthogonal frequency division multiplexing (OFDM) symbol of the PDSCH is mapped in a first slot;
• the PUCCH is received in a second slot,
• a number of slots from the first slot to the second slot is given based on a PDSCH-to-hybrid automatic repeat request (PDSCH-to-HARQ)-timing-indicator field, and
• a length of each of the slots is given based on a subcarrier spacing configuration of the PUCCH.

A communication method used for a terminal apparatus in a wireless communication system, the communication method comprising:

• receiving a physical downlink control channel (PDCCH) including a downlink control information (DCI) format;
• and
• transmitting a physical uplink control channel (PUCCH), wherein in a case that the DCI format schedules a physical downlink shared channel (PDSCH) and that a last orthogonal frequency division multiplexing (OFDM) symbol of the PDSCH is mapped in a first slot;
• the PUCCH is transmitted in a second slot,
• a number of slots from the first slot to the second slot is given based on a PDSCH-to-hybrid automatic repeat request (PDSCH-to-HARQ)-timing-indicator field, and
• a length of each of the slots is given based on a subcarrier spacing configuration of the PUCCH.

A communication method used for a base station apparatus in a wireless communication system, the communication method comprising:

• transmitting a physical downlink control channel (PDCCH) including a downlink control information (DCI) format;
• and
• receiving a physical uplink control channel (PUCCH), wherein in a case that the DCI format schedules a physical downlink shared channel (PDSCH) and that a last orthogonal frequency division multiplexing (OFDM) symbol of the PDSCH is mapped in a first slot;
• the PUCCH is received in a second slot,
• a number of slots from the first slot to the second slot is given based on a PDSCH-to-hybrid automatic repeat request (PDSCH-to-HARQ)-timing-indicator field, and
• a length of each of the slots is given based on a subcarrier spacing configuration of the PUCCH.