Method and device for transmitting/receiving HARQ-ACK information in wireless communication system

1. A method of transmitting, by a user equipment (UE), hybrid automatic repeat and reQuest-acknowledgement (HARQ-ACK) information in a wireless communication system, the method comprising:

receiving first downlink control information (DCI) based on a first control resource set group and second DCI based on a second control resource set group;

receiving a first physical downlink shared channel (PDSCH) scheduled by the first DCI and a second PDSCH scheduled by the second DCI;

determining a physical uplink control channel (PUCCH) resource for a transmission of the HARQ-ACK information which is related to a feedback for the first PDSCH and the second PDSCH; and

transmitting the HARQ-ACK information based on the determined PUCCH resource,

wherein the first DCI and the second DCI are indexed based on (i) an index of a physical downlink control channel (PDCCH) monitoring occasion, (ii) a cell index, and (iii) an index associated with each control resource set group, and

wherein the PUCCH resource is determined based on a last DCI which is a DCI with a last index among the indexed DCIs, and

wherein, based on a feedback mode of the HARQ-ACK information being configured as a joint mode, first HARQ-ACK information associated with the first control resource set group and second HARQ-ACK information associated with the second control resource set group are concatenated and transmitted.

2. The method of claim 1 , further comprising:

receiving configuration information,

wherein the configuration information includes information related to the feedback mode of the HARQ-ACK information.

3. The method of claim 2 , wherein the information related to the feedback mode indicates one of the joint mode or a separate mode.

4. The method of claim 3 , wherein the first DCI and the second DCI are indexed in an ascending order of the cell index for the same PDCCH monitoring occasion, and then are indexed in an ascending order of the index of the PDCCH monitoring occasion.

5. The method of claim 3 , wherein, based on that the information related to the feedback mode indicates the joint mode, the first HARQ-ACK information and the second HARQ-ACK information are concatenated to construct one HARQ-ACK information.

6. The method of claim 5 , wherein, based on that an index associated with the first control resource set group is 0, and an index associated with the second control resource set group is 1, the first DCI is indexed earlier than the second DCI.

7. The method of claim 3 , wherein, based on that the information related to the feedback mode indicates the separate mode, the first HARQ-ACK information and the second HARQ-ACK information each are TDMed (time division multiplexing) in one slot and are transmitted.

8. The method of claim 1 , wherein the first control resource set group is included in a first serving cell, and the second control resource set group is included in a second serving cell,

wherein a first HARQ-ACK codebook for the first serving cell and a second HARQ-ACK codebook for the second serving cell are separately generated, and

wherein the HARQ-ACK information is generated by concatenating the first HARQ-ACK codebook and the second HARQ-ACK codebook.

9. The method of claim 1 , wherein each DCI includes a PUCCH resource indicator field.

10. The method of claim 1 , wherein the first DCI and the first PDSCH are received through a first transmission and reception point, and the second DCI and the second PDSCH are received through a second transmission and reception point.

11. The method of claim 1 , wherein the HARQ-ACK information is transmitted through at least one of a first transmission and reception point or a second transmission and reception point.

12. A user equipment (UE) configured to transmit hybrid automatic repeat and reQuest-acknowledgement (HARQ-ACK) information in a wireless communication system, the UE comprising:

one or more transceivers;

one or more processors; and

one or more memories connected to the one or more processors and storing instructions that, when executed by the one or more processors, perform operations that comprise:

receiving first downlink control information (DCI) based on a first control resource set group and second DCI based on a second control resource set group;

receiving a first physical downlink shared channel (PDSCH) scheduled by the first DCI and a second PDSCH scheduled by the second DCI;

determining a physical uplink control channel (PUCCH) resource for a transmission of the HARQ-ACK information which is related to a feedback for the first PDSCH and the second PDSCH; and

transmitting the HARQ-ACK information based on the determined PUCCH resource,

wherein the first DCI and the second DCI are indexed based on (i) an index of a physical downlink control channel (PDCCH) monitoring occasion, (ii) a cell index, and (iii) an index associated with each control resource set group,

wherein the PUCCH resource is determined based on a last DCI which is a DCI with a last index among the indexed DCIs, and

wherein, based on a feedback mode of the HARQ-ACK information being configured as a joint mode, first HARQ-ACK information associated with the first control resource set group and second HARQ-ACK information associated with the second control resource set group are concatenated and transmitted.

13. The UE of claim 12 , wherein, based on that an index associated with the first control resource set group is 0, and an index associated with the second control resource set group is 1, the first DCI is indexed earlier than the second DCI.

14. A method of receiving, by a base station (BS), hybrid automatic repeat and reQuest-acknowledgement (HARQ-ACK) information in a wireless communication system, the method comprising:

transmitting, to a user equipment (UE), first downlink control information (DCI) based on a first control resource set group and second DCI based on a second control resource set group;

transmitting, to the UE, a first physical downlink shared channel (PDSCH) scheduled by the first DCI and a second PDSCH scheduled by the second DCI; and

receiving, from the UE, the HARQ-ACK information based on a physical uplink control channel (PUCCH) resource,

wherein the HARQ-ACK information is related to a feedback for the first PDSCH and the second PDSCH,

wherein the first DCI and the second DCI are indexed based on (i) an index of a physical downlink control channel (PDCCH) monitoring occasion, (ii) a cell index, and (iii) an index associated with each control resource set group,

wherein the PUCCH resource is determined based on a last DCI which is a DCI with a last index among the indexed DCIs, and

wherein, based on a feedback mode of the HARQ-ACK information being configured as a joint mode, first HARQ-ACK information associated with the first control resource set group and second HARQ-ACK information associated with the second control resource set group are concatenated and transmitted.