LINKED PHYSICAL DOWNLINK CONTROL CHANNEL CANDIDATE RULES

1 . An apparatus for wireless communication at a user equipment (UE), comprising:

one or more processors;

a transceiver coupled with the one or more processors; and

at least one memory coupled with the one or more processors, the one or more processors configured to:

monitor for downlink control information among a plurality of physical downlink control channel candidates that are associated with each other, the plurality of physical downlink control channel candidates including at least a first physical downlink control channel candidate in a first transmission time period of the plurality of physical downlink control channel candidates and a last physical downlink control channel candidate in a second transmission time period of the plurality of physical downlink control channel candidates;

determine a reference time based at least in part on a reference timing rule, where the reference timing rule is based at least in part on the association between the plurality of physical downlink control channel candidates and indicates that the reference time is to be determined based at least in part on either the first transmission time period or the second transmission time period; and

communicate, via the transceiver, based at least in part on the reference time.

2 . The apparatus of claim 1 , wherein the one or more processors are further configured to:

monitor for one or more repetitions of the downlink control information indicating a slot format indicator index among the plurality of physical downlink control channel candidates, the slot format indicator index identifying one or more communication directions for each slot in a set of upcoming slots, wherein the reference timing rule indicates the reference time to be used by the UE for application of the slot format indicator index;

identify the set of upcoming slots based at least in part on the reference time and the slot format indicator index; and

communicate, via the transceiver, in the set of upcoming slots according to the one or more communication directions of each slot.

3 . The apparatus of claim 2 , wherein the reference time is specified by the reference timing rule as one of the second transmission time period associated with the last physical downlink control channel candidate, the first transmission time period associated with the first physical downlink control channel candidate, or additionally a physical downlink control channel candidate index among the plurality of physical downlink control channel candidates, a search space set identifier associated with the plurality of physical downlink control channel candidates, or a control resource set identifier associated with the plurality of physical downlink control channel candidates.

4 . The apparatus of claim 1 , wherein the one or more processors are further configured to:

monitor for one or more repetitions of the downlink control information indicating a search space set group switching flag among the plurality of physical downlink control channel candidates, the search space set group switching flag identifying an updated search space set group that the UE is to use in a set of upcoming slots, wherein the reference timing rule indicates the reference time to be used by the UE for application of the search space set group switching flag;

identify the set of upcoming slots based at least in part on the reference time and the search space set group switching flag; and

communicate, via the transceiver, in the set of upcoming slots according to the updated search space set group.

5 . The apparatus of claim 4 , wherein the reference timing rule indicates that application of the updated search space set group switching flag is to occur in a first slot that is at least a first number of symbols after a last symbol of the reference time.

6 . The apparatus of claim 4 , wherein the one or more processors are further configured to:

receive a configuration signal indicating a switching delay between the downlink control information indicating the search space set group switching flag and the set of upcoming slots, wherein the set of upcoming slots are identified based at least in part on the switching delay.

7 . The apparatus of claim 1 , wherein the one or more processors are further configured to:

monitor for one or more repetitions of the downlink control information indicating an interrupted transmission among the plurality of physical downlink control channel candidates, the interrupted transmission identifying a set of physical resource blocks and symbols in a set of previous symbols in which a transmission scheduled for the UE has been interrupted, wherein the reference timing rule indicates the reference time to be used by the UE for application of the interrupted transmission;

identify the set of previous symbols based at least in part on the reference time and the interrupted transmission; and

refrain from communicating in the set of previous symbols according to the interrupted transmission.

8 . The apparatus of claim 7 , wherein the reference timing rule indicates that application of the interrupted transmission is to occur in a number of symbols that are prior to a first symbol of the reference time.

9 . The apparatus of claim 1 , wherein the one or more processors are further configured to:

monitor for one or more repetitions of the downlink control information indicating a cancelation indication among the plurality of physical downlink control channel candidates, the cancelation indication identifying a set of physical resource blocks and symbols in a set of upcoming symbols in which the UE is to cancel uplink transmission, wherein the reference timing rule indicates the reference time to be used by the UE for application of the cancelation indication;

identify the set of upcoming symbols based at least in part on the reference time and the cancelation indication; and

refrain from performing uplink transmissions in the set of upcoming symbols according to the cancelation indication.

10 . The apparatus of claim 9 , wherein the reference timing rule indicates that application of the cancelation indication is to occur in a first symbol after a processing time that follows the reference time.

11 . The apparatus of claim 1 , wherein the one or more processors are further configured to:

monitor for one or more repetitions of the downlink control information indicating a bandwidth part change among the plurality of physical downlink control channel candidates, the bandwidth part change identifying a change in a bandwidth part configured for the UE in a set of upcoming slots, wherein the reference timing rule indicates the reference time to be used by the UE for application of the bandwidth part change;

identify the set of upcoming slots based at least in part on the reference time and the bandwidth part change;

refrain from communicating during a time period between the first transmission time period or the second transmission time period in which the downlink control information indicating the bandwidth part change is received and the set of upcoming slots; and

communicate, via the transceiver, in the set of upcoming slots according to the bandwidth part change.

12 . The apparatus of claim 11 , wherein the reference time is specified by the reference timing rule as one of the second transmission time period associated with the last physical downlink control channel candidate, the first transmission time period associated with the first physical downlink control channel candidate, or additionally a physical downlink control channel candidate index among the plurality of physical downlink control channel candidates, a search space set identifier associated with the plurality of physical downlink control channel candidates, or a control resource set identifier associated with the plurality of physical downlink control channel candidates.

13 . An apparatus for wireless communication at a base station, comprising:

one or more processors; and

at least one memory coupled with the one or more processors, the one or more processors configured to:

identify, for a user equipment (UE), a plurality of physical downlink control channel candidates that are associated with each other and used to convey downlink control information, the plurality of physical downlink control channel candidates including at least a first physical downlink control channel candidate in a first transmission time period of the plurality of physical downlink control channel candidates and a last physical downlink control channel candidate in a second transmission time period of the plurality of physical downlink control channel candidates;

identify, for the UE, a reference timing rule based at least in part on the association between the plurality of physical downlink control channel candidates, the reference timing rule indicating that a reference time is to be determined based at least in part on either the first transmission time period or the second transmission time period;

transmit, to the UE, one or more instances of the downlink control information among the plurality of physical downlink control channel candidates; and

communicate with the UE based at least in part on the reference time, the reference time being based at least in part on the reference timing rule.

14 . The apparatus of claim 13 , wherein the one or more processors are further configured to:

identify, for the UE, a slot format indicator index identifying one or more communication directions for each slot in a set of upcoming slots, wherein the reference timing rule indicates the reference time to be used by the UE for application of the slot format indicator index;

transmit one or more repetitions of the downlink control information indicating the slot format indicator index among the plurality of physical downlink control channel candidates; and

communicate with the UE in the set of upcoming slots according to the one or more communication directions of each slot.

15 . The apparatus of claim 13 , wherein the one or more processors are further configured to:

identify, for the UE, a search space set group switching flag identifying an updated search space set group that the UE is to use in a set of upcoming slots, wherein the reference timing rule indicates the reference time to be used by the UE for application of the search space set group switching flag;

transmit one or more repetitions of the downlink control information indicating the search space set group switching flag among the plurality of physical downlink control channel candidates; and

communicate in the set of upcoming slots according to the updated search space set group.

16 . The apparatus of claim 15 , wherein the one or more processors are further configured to:

transmit, to the UE, a configuration signal indicating a switching delay between the downlink control information indicating the search space set group switching flag and the set of upcoming slots, wherein the set of upcoming slots are identified by the UE based at least in part on the switching delay.

17 . The apparatus of claim 13 , wherein the one or more processors are further configured to:

identify, for the UE, an interrupted transmission identifying a set of physical resource blocks and symbols in a set of previous symbols in which a transmission scheduled for the UE has been interrupted, wherein the reference timing rule indicates the reference time to be used by the UE for application of the interrupted transmission;

transmit one or more repetitions of the downlink control information indicating the interrupted transmission among the plurality of physical downlink control channel candidates; and

refrain from communicating with the UE in the set of previous symbols according to the interrupted transmission.

18 . The apparatus of claim 13 , wherein the one or more processors are further configured to:

identify, for the UE, a cancelation indication identifying a set of physical resource blocks and symbols in a set of upcoming symbols in which the UE is to cancel an uplink transmission, wherein the reference timing rule indicates the reference time to be used by the UE for application of the cancelation indication;

transmit one or more repetitions of the downlink control information indicating the cancelation indication among the plurality of physical downlink control channel candidates; and

refrain from receiving uplink transmissions from the UE in the set of upcoming symbols according to the cancelation indication.

19 . The apparatus of claim 13 , wherein the one or more processors are further configured to:

identify, for the UE, a bandwidth part change identifying a change in a bandwidth part configured for the UE in a set of upcoming slots, wherein the reference timing rule indicates the reference time to be used by the UE for application of the bandwidth part change;

transmit one or more repetitions of the downlink control information indicating the bandwidth part change among the plurality of physical downlink control channel candidates;

refrain from communicating with the UE during a time period between the first transmission time period or the second transmission time period in which the downlink control information indicating the bandwidth part change is receive and the set of upcoming slots; and

communicate with the UE in the set of upcoming slots according to the bandwidth part change.

20 . A method for wireless communication at a base station, comprising:

identifying, for a user equipment (UE), a plurality of physical downlink control channel candidates that are associated with each other and used to convey downlink control information, the plurality of physical downlink control channel candidates including at least a first physical downlink control channel candidate in a first transmission time period of the plurality of physical downlink control channel candidates and a last physical downlink control channel candidate in a second transmission time period of the plurality of physical downlink control channel candidates;

identifying, for the UE, a reference timing rule based at least in part on the association between the plurality of physical downlink control channel candidates, the reference timing rule indicating that a reference time is to be determined based at least in part on either the first transmission time period or the second transmission time period;

transmitting, to the UE, one or more instances of the downlink control information among the plurality of physical downlink control channel candidates; and

communicating with the UE based at least in part on the reference time, the reference time being based at least in part on the reference timing rule.