Pruning rules for DCI repetition

1. A method for wireless communications by a user equipment (UE), comprising:

detecting at least first downlink control information (DCI) and second DCI that both indicate same or similar scheduling information for a common uplink data transmission or a downlink data transmission;

determining the second DCI is a repetition of the first DCI if values of each field of the first and second DCIs are the same, wherein the determination is based on:

a PUCCH resource indicator (PRI) in the DCI; and

at least one of:

a number of control channel elements (CCEs) of a control resource set (CORESET) on which each DCI is received, or

an index of a first CCE of each DCI;

selecting, based at least in part on determining the second DCI is a repetition of the first DCI, at least one of the first or second DCI to use for determining scheduling parameters to use for the uplink data transmission, or for reception of the downlink data transmission, or for an uplink control information (UCI) transmission to provide feedback for the downlink data transmission; and

utilizing the scheduling parameters to at least one of process the DL data transmission or send the uplink data transmission or UCI transmission.

2. The method of claim 1 , wherein the DCIs are detected in different transmission time intervals (TTIs).

3. The method of claim 2 , wherein the DCIs span at least one of different time slots or symbols.

4. The method of claim 1 , wherein the selecting comprises selecting the first or second DCI that occurs in a later occurring physical downlink control channel (PDCCH) monitoring occasion.

5. The method of claim 1 , wherein:

the first and second DCI occur in a same physical downlink control channel (PDCCH) monitoring occasion; and

the selecting is based on at least one of: the number of control channel elements (CCEs) of a CORESET of each DCI or an index of a first CCE of each DCI.

6. The method of claim 1 , wherein the UE:

calculates a first index that points to resources for the uplink control transmission based on parameters of the first DCI; and

calculates a second index that points to resources for the uplink control transmission based on parameters of the second DCI; and

choosing an index to use for determining resources to use for the uplink control transmission based on a function of the first and second indices.

7. The method of claim 1 , wherein:

the first and second DCI are detected in different CORESETs, each CORESET in a different CORESET group; and

the first or second DCI is selected based on the CORESET group of its corresponding CORESET.

8. The method of claim 1 , wherein:

the first or second DCI is selected based on a corresponding detection confidence level.

9. The method of claim 8 , wherein the detection confidence level of each DCI is determined based on at least one of: channel quality of demodulation reference signals (DMRS), aggregation level (AL), or log likelihood ratio (LLR) values.

10. The method of claim 1 , wherein:

the UE determines different resources to use for the uplink transmission based on both the first and second DCI; and

the UE sends the uplink transmission using the different resources.

11. The method of claim 1 , wherein:

values of at least one field of the first and second DCIs are different; and

the UE is configured to determine the second DCI is a repetition of the first DCI based on one or more conditions.

12. The method of claim 11 , wherein the conditions comprise at least one of:

scheduling information for the first and second DCI both point to same time and frequency domain resources;

the first and second DCI indicate at least one of a same hybrid automatic repeat request (HARQ) process ID, same NDI value, or same DCI identifier; or

the first and second DCI have a same redundancy version (RV), modulation coding scheme (MCS), or antenna port.

13. The method of claim 11 , further comprising ignoring both DCI if:

scheduling information for the first and second DCI both point to same time and frequency domain resources; and

the first and second DCI indicate different hybrid automatic repeat request (HARQ) process IDs or NDI values.

14. The method of claim 11 , wherein the UE uses information from both DCIs only when the information is not conflicting.

15. The method of claim 11 , wherein the UE is configured to select a DCI based on a value of a PDSCH-to-HARQ-timing indicator field.

16. The method of claim 11 , wherein the one or more conditions comprise at least one of:

determining the first and second DCIs are transmitted with different beams, transmission configuration indicator (TCI) states, transmission reception points (TRPs), or panels; or

determining the DCIs are received on different UE panels or received on different CORESETs from different CORESET groups with different TCI states.

17. A method for wireless communications by a network entity, comprising:

transmitting at least first downlink control information (DCI) and second DCI that both indicate same or similar scheduling information for a common uplink or downlink transmission, wherein:

the first and second DCI are sent using different transmission parameters, and

the first and second DCI are sent using different beams;

determining, based on the first and second DCI, first and second resources to monitor for the uplink transmission or for an uplink control information (UCI) transmission that provides feedback for the downlink transmission;

monitoring the first and second resources for the uplink transmission or UCI transmission; and

selecting transmission parameters and a beam used for the first or second DCI for subsequent transmissions, depending on which of the first or second resources the uplink transmission or UCI transmission is detected.

18. The method of claim 17 , further comprising adjusting one or more transmission parameters based on the monitoring.

19. An apparatus for wireless communications by a user equipment (UE), comprising:

means for detecting at least first downlink control information (DCI) and second DCI that both indicate same or similar scheduling information for a common uplink data transmission or a downlink data transmission;

means for determining the second DCI is a repetition of the first DCI if values of each field of the first and second DCIs are the same, wherein the determination is based on:

a PUCCH resource indicator (PRI) in the DCI; and

at least one of:

a number of control channel elements (CCEs) of a control resource set (CORESET) on which each DCI is received, or

an index of a first CCE of each DCI;

means for selecting, based at least in part on determining the second DCI is a repetition of the first DCI, at least one of the first or second DCI to use for determining scheduling parameters to use for the uplink data transmission, or for reception of the downlink data transmission, or for an uplink control information (UCI) transmission to provide feedback for the downlink data transmission; and

means for utilizing the scheduling parameters to at least one of process the DL data transmission or send the uplink data transmission or UCI transmission.

20. An apparatus for wireless communications by a network entity, comprising:

means for transmitting at least first downlink control information (DCI) and second DCI that both indicate same or similar scheduling information for a common uplink or downlink transmission, wherein:

the first and second DCI are sent using different transmission parameters, and

the first and second DCI are sent using different beams

the network entity selects a beam based on which of the first or second resources the uplink transmission or UCI transmission is detected;

means for determining, based on the first and second DCI, first and second resources to monitor for the uplink transmission or for an uplink control information (UCI) transmission that provides feedback for the downlink transmission;

means for monitoring the first and second resources for the uplink transmission or UCI transmission; and

means for selecting transmission parameters and a beam used for the first or second DCI for subsequent transmissions, depending on which of the first or second resources the uplink transmission or UCI transmission is detected.