Method for transmitting uplink control channel in wireless communication system and device therefor
A method for transmitting an uplink control channel for a terminal configured to support multiple transmission time interval (TTI) lengths in a wireless communication system according to an embodiment of the present invention is performed by the terminal and may comprises the steps of: receiving a first physical downlink shared channel (PDSCH) according to a first TTI length at a first time point; receiving a second PDSCH according to a second TTI length differing from the first TTI length at a second time point; and when TTIs for transmitting uplink control channels for the received first PDSCH and second PDSCH overlap, transmitting uplink control information for the first PDSCH and second PDSCH on a physical uplink control channel (PUCCH) having the shorter TTI length among the first TTI length and the second TTI length.
1. A terminal for transmitting an uplink control channel in a wireless communication system, the terminal comprising:
at least one radio frequency (RF) transceiver;
at least one processor; and
at least one memory that is operably connectable to the at least one processor and that has stored thereon at least one program which, when executed, causes the at least one processor to perform operations comprising:
receiving a first physical downlink shared channel (PDSCH) based on a first transmission time interval (TTI) length;
receiving a second PDSCH based on a second TTI length different from the first TTI length; and
transmitting a first hybrid automatic repeat request acknowledgment (HARQ-ACK) feedback for the first PDSCH and a second HARQ-ACK feedback for the second PDSCH,
wherein transmitting the first HARQ-ACK feedback for the first PDSCH and the second HARQ-ACK feedback for the second PDSCH comprises:
based on transmission of the first HARQ-ACK feedback overlapping in time with transmission of the second HARQ-ACK feedback, transmitting the first HARQ-ACK feedback and the second HARQ-ACK feedback on a physical uplink control channel (PUCCH) with the first TTI length or the second TTI length, whichever is the shorter TTI length.
2. The terminal of claim 1 , wherein the operations further comprise:
receiving a first physical downlink control channel (PDCCH) that schedules the first PDSCH based on the first TTI length;
receiving a second PDCCH that schedules the second PDSCH based on the second TTI length; and
based on transmission of the first HARQ-ACK feedback overlapping in time with transmission of the second HARQ-ACK feedback overlap, determining a resource of the PUCCH based on the first PDCCH or the second PDCCH, whichever schedules a PDSCH based on the shorter TTI length.
3. The terminal of claim 1 , wherein transmitting the first HARQ-ACK feedback for the first PDSCH and the second HARQ-ACK feedback for the second PDSCH comprises:
based on transmission of the first HARQ-ACK feedback overlapping in time with transmission of the second HARQ-ACK feedback, transmitting the first HARQ-ACK feedback and the second HARQ-ACK feedback on the PDCCH by HARQ-ACK bundling.
4. The terminal of claim 3 , wherein the HARQ-ACK bundling is performed for HARQ-ACKs for codewords based on the first TTI length.
5. The terminal of claim 3 , wherein the HARQ-ACK bundling is performed for HARQ-ACKs for codewords based on the second TTI length.
6. A non-transitory computer readable storage medium storing at least one program that, when executed by at least one processor, causes the at least one processor to perform operations for a terminal, the operations comprising:
receiving a first physical downlink shared channel (PDSCH) based on a first transmission time interval (TTI) length;
receiving a second PDSCH based on a second TTI length different from the first TTI length; and
transmitting a first hybrid automatic repeat request acknowledgment (HARQ-ACK) feedback for the first PDSCH and a second HARQ-ACK feedback for the second PDSCH,
wherein transmitting the first HARQ-ACK feedback for the first PDSCH and the second HARQ-ACK feedback for the second PDSCH comprises:
based on transmission of the first HARQ-ACK feedback overlapping in time with transmission of the second HARQ-ACK feedback, transmitting the first HARQ-ACK feedback and the second HARQ-ACK feedback on a physical uplink control channel (PUCCH) with the first TTI length or the second TTI length, whichever is the shorter TTI length.
7. A non-transitory computer readable storage medium of claim 6 , wherein the operations further comprise:
receiving a first physical downlink control channel (PDCCH) that schedules the first PDSCH based on the first TTI length;
receiving a second PDCCH that schedules the second PDSCH based on the second TTI length; and
based on transmission of the first HARQ-ACK feedback overlapping in time with transmission of the second HARQ-ACK feedback overlap, determining a resource of the PUCCH based on the first PDCCH or the second PDCCH, whichever schedules a PDSCH based on the shorter TTI length.
8. A non-transitory computer readable storage medium of claim 6 , wherein transmitting the first HARQ-ACK feedback for the first PDSCH and the second HARQ-ACK feedback for the second PDSCH comprises:
based on transmission of the first HARQ-ACK feedback overlapping in time with transmission of the second HARQ-ACK feedback, transmitting the first HARQ-ACK feedback and the second HARQ-ACK feedback on the PUCCH by HARQ-ACK bundling.
9. A non-transitory computer readable storage medium of claim 8 , wherein the HARQ-ACK bundling is performed for HARQ-ACKs for codewords based on the first TTI length.
10. A non-transitory computer readable storage medium of claim 8 , wherein the HARQ-ACK bundling is performed for HARQ-ACKs for codewords based on the second TTI length.
11. A base station for receiving an uplink control channel in a wireless communication system, the base station comprising:
at least one radio frequency (RF) transceiver;
at least one processor; and
at least one memory that is operably connectable to the at least one processor and that has stored thereon at least one program which, when executed, causes the at least one processor to perform operations comprising:
transmitting a first physical downlink shared channel (PDSCH) based on a first transmission time interval (TTI) length to a terminal;
transmitting a second PDSCH based on a second TTI length different from the first TTI length to the terminal; and
receiving a first hybrid automatic repeat request acknowledgment (HARQ-ACK) feedback for the first PDSCH and a second HARQ-ACK feedback for the second PDSCH from the terminal,
wherein receiving the first HARQ-ACK feedback for the first PDSCH and the second HARQ-ACK feedback for the second PDSCH comprises:
based on transmission of the first HARQ-ACK feedback overlapping in time with transmission of the second HARQ-ACK feedback, receiving the first HARQ-ACK feedback and the second HARQ-ACK feedback on a physical uplink control channel (PUCCH) with the first TTI length or the second TTI length, whichever is the shorter TTI length.
12. The base station of claim 11 , wherein the operations further comprise:
transmitting a first physical downlink control channel (PDCCH) that schedules the first PDSCH based on the first TTI length to the terminal;
transmitting a second PDCCH that schedules the second PDSCH based on the second TTI length to the terminal; and
based on transmission of the first HARQ-ACK feedback overlapping in time with transmission of the second HARQ-ACK feedback overlap in the time domain, determining a resource of the PUCCH based on the first PDCCH or the second PDCCH, whichever schedules a PDSCH based on the shorter TTI length.
13. The base station of claim 11 , wherein receiving the first HARQ-ACK feedback for the first PDSCH and the second HARQ-ACK feedback for the second PDSCH comprises: based on transmission of the first HARQ-ACK feedback overlapping in time with transmission of the second HARQ-ACK feedback overlap in the time domain, receiving the PUCCH that carries HARQ-ACK bits for the first HARQ-ACK feedback and the second HARQ-ACK feedback by HARQ-ACK bundling.
14. The base station of claim 13 , wherein at least one of the HARQ-ACK bits is a bundled HARQ-ACK bit for codewords based on the first TTI length.
15. The base station of claim 13 , wherein at least one of the HARQ-ACK bits is a bundled HARQ-ACK for codewords based on the second TTI length.