Method, apparatus, and system for transmitting HARQ-ACK codebook in wireless communication system
The present invention relates to a wireless communication system and, more particularly, to a method comprising the steps of: receiving a PDCCH for multi-slot scheduling; determining a PDSCH candidate for each slot on the basis of information in the PDCCH; and transmitting a semi-static HARQ-ACK codebook on the basis of the determined PDSCH candidate of each slot, and to an apparatus therefor.
1. A user equipment configured to operate in a wireless communication system, the user equipment comprising:
a communication module; and
a processor that controls the communication module,
wherein the processor is configured to:
receive a physical downlink control channel (PDCCH) having the following information:
index information indicating one entry in a time-domain resource allocation (TDRA) table for physical downlink shared channel (PDSCH) allocation, and
timing information indicating one value in a K1-set {K1 i } for PDSCH-to-hybrid automatic repeat and request (HARQ) slot timing, wherein i represents an index of element;
determine a PDSCH candidate set associated with slot n−K1 i , wherein slot n is indicated by using the timing information; and
transmit a semi-static HARQ-ACK codebook in the slot n, based on the PDSCH candidate set,
wherein, for determining the PDSCH candidate set, the K1-set is replaced by a sum of the K1-set {K1 i } and {d k } based on at least one entry in the TDRA table being associated with multi-slot scheduling, and d k corresponds to a number of slots between a slot to which a last PDSCH can be allocated and a slot to which a k-th PDSCH can be allocated based on the multi-slot scheduling in the TDRA table, and k represents an index of element.
2. The user equipment of claim 1 , wherein a plurality of HARQ-ACK occasions is determined based on the PDSCH candidate set, and the semi-static HARQ-ACK codebook is configured based on the plurality of HARQ-ACK occasions.
3. The user equipment of claim 1 , wherein a subcarrier spacing (SCS) applied to a downlink slot is the same as a SCS applied to an uplink slot.
4. The user equipment of claim 1 , wherein the wireless communication system includes a 3rd generation partnership project (3GPP) new radio (NR)-based wireless communication system.
5. A method for use by a user equipment in a wireless communication system, the method comprising:
receiving a physical downlink control channel (PDCCH) having the following information:
index information indicating one entry in a time-domain resource allocation (TDRA) table for physical downlink shared channel (PDSCH) allocation, and
timing information indicating one value in a K1-set {K1 i } for PDSCH-to-hybrid automatic repeat and request (HARQ) slot timing, wherein i represents an index of element;
determining a PDSCH candidate set associated with slot n−K1 i , wherein slot n is indicated by using the timing information; and
transmitting a semi-static HARQ-ACK codebook in the slot n, based on the PDSCH candidate set,
wherein, for determining the PDSCH candidate set, the K1-set is replaced by a sum of the K1-set {K1 i } and {d k } based on at least one entry in the TDRA table being associated with multi-slot scheduling, and d k corresponds to a number of slots between a slot to which a last PDSCH can be allocated and a slot to which a k-th PDSCH can be allocated based on the multi-slot scheduling in the TDRA table, and k represents an index of element.
6. The method of claim 5 , wherein a plurality of HARQ-ACK occasions is determined based on the PDSCH candidate set, and the semi-static HARQ-ACK codebook is configured based on the plurality of HARQ-ACK occasions.
7. The method of claim 5 , wherein a subcarrier spacing (SCS) applied to a downlink slot is the same as a SCS applied to an uplink slot.
8. The method of claim 5 , wherein the wireless communication system includes a 3rd generation partnership project (3GPP) new radio (NR)-based wireless communication system.
9. A base station configured to operate in a wireless communication system, the base station comprising:
a communication module; and
a processor that controls the communication module,
wherein the processor is further configured to:
transmit a physical downlink control channel (PDCCH) having the following information:
index information indicating one entry in a time-domain resource allocation (TDRA) table for physical downlink shared channel (PDSCH) allocation, and
timing information indicating one value in a K1-set {K1 i } for PDSCH-to-hybrid automatic repeat and request (HARQ) slot timing, wherein i represents an index of element;
determine a PDSCH candidate set associated with slot n-K1 i , wherein slot n is indicated by using the timing information; and
receive a semi-static HARQ-ACK codebook in the slot n, based on the PDSCH candidate set,
wherein, for determining the PDSCH candidate set, the K1-set is replaced by a sum of the K1-set {K1 i } and {d k } based on at least one entry in the TDRA table being associated with multi-slot scheduling, and d k corresponds to a number of slots between a slot to which a last PDSCH can be allocated and a slot to which a k-th PDSCH can be allocated based on the multi-slot scheduling in the TDRA table, and k represents an index of element.
10. The base station of claim 9 , wherein a plurality of HARQ-ACK occasions is determined based on the PDSCH candidate set, and the semi-static HARQ-ACK codebook is configured based on the plurality of HARQ-ACK occasions.
11. The base station of claim 9 , wherein a subcarrier spacing (SCS) applied to a downlink slot is the same as a SCS applied to an uplink slot.
12. The base station of claim 9 , wherein the wireless communication system includes a 3rd generation partnership project (3GPP) new radio (NR)-based wireless communication system.
13. A method for use by a base station in a wireless communication system, the method comprising:
transmitting a physical downlink control channel (PDCCH) having the following information:
index information indicating one entry in a time-domain resource allocation (TDRA) table for physical downlink shared channel (PDSCH) allocation, and
timing information indicating one value in a K1-set {K1 i } for PDSCH-to-hybrid automatic repeat and request (HARQ) slot timing, wherein i represents an index of element;
determining a PDSCH candidate set associated with slot n-K1 i , wherein slot n is indicated by using the timing information; and
receiving a semi-static HARQ-ACK codebook in the slot n, based on the PDSCH candidate set,
wherein, for determining the PDSCH candidate set, the K1-set is replaced by a sum of the K1-set {K1 i } and {d k } based on at least one entry in the TDRA table being associated with multi-slot scheduling, and d k corresponds to a number of slots between a slot to which a last PDSCH can be allocated and a slot to which a k-th PDSCH can be allocated based on the multi-slot scheduling in the TDRA table, and k represents an index of element.
14. The method of claim 13 , wherein a plurality of HARQ-ACK occasions is based on the PDSCH candidate set, and the semi-static HARQ-ACK codebook is configured based on the plurality of HARQ-ACK occasions.
15. The method of claim 13 , wherein a subcarrier spacing (SCS) applied to a downlink slot is the same as a SCS applied to an uplink slot.
16. The method of claim 13 , wherein the wireless communication system includes a 3rd generation partnership project (3GPP) new radio (NR)-based wireless communication system.