Physical uplink control channel (PUCCH) resource identification for deferred transmission of acknowledgment feedback
Certain aspects of the present disclosure provide techniques for determining resources to use for deferred transmission of acknowledgment feedback. An example method generally includes monitoring for a semi-persistently scheduled (SPS) physical downlink shared channel (PDSCH); determining that a first resource, identified by a first physical uplink control channel (PUCCH) resource identifier (PRI), for transmitting a physical uplink control channel (PUCCH) with acknowledgment feedback for the SPS PDSCH collides with a downlink resource; identifying a second resource for transmitting the PUCCH based on parameters associated with the first PRI or a second PRI; and transmitting the PUCCH on the second resource.
1. A method for wireless communications by a user equipment (UE), comprising:
monitoring for a semi-persistently scheduled (SPS) physical downlink shared channel (PDSCH);
determining that a first resource, identified by a first physical uplink control channel (PUCCH) resource identifier (PRI), for transmitting a physical uplink control channel (PUCCH) with acknowledgment feedback for the SPS PDSCH collides with a downlink resource;
identifying a second resource for transmitting the PUCCH based on parameters associated with the first PRI or a second PRI;
transmitting the PUCCH on the second resource; and
wherein the second resource comprises one or more symbols in a same slot as one or more symbols of the first resource.
2. The method of claim 1 , wherein the second resource comprises an earliest available symbol in the same slot.
3. The method of claim 1 , wherein the second resource is identified based on the second PRI.
4. The method of claim 3 , wherein the second PRI is associated with a same uplink control information (UCI) payload as the first PRI.
5. The method of claim 1 , wherein:
the second PRI and at least a third PRI are both associated with a same UCI payload as the first PRI and are in a same PUCCH resource set; and
the second PRI is selected based on the second PRI having a lower PRI index than the third PRI.
6. A method for wireless communications by a network entity, comprising:
transmitting a semi-persistently scheduled (SPS) physical downlink shared channel (PDSCH) to a user equipment (UE);
determining that a first resource, identified by a first physical uplink control channel (PUCCH) resource identifier (PRI), for receiving a physical uplink control channel (PUCCH) from the UE with acknowledgment feedback for the SPS PDSCH collides with a downlink resource;
identifying a second resource for transmitting the PUCCH based on parameters associated with the first PRI or a second PRI;
monitoring for the PUCCH on the second resource; and
wherein the second resource comprises one or more symbols in a same slot as one or more symbols of the first resource.
7. The method of claim 6 , wherein the second resource comprises an earliest available symbol in the same slot.
8. The method of claim 6 , wherein the second resource is identified based on the second PRI.
9. The method of claim 8 , wherein the second PRI is associated with a same uplink control information (UCI) payload as the first PRI.
10. The method of claim 6 , wherein:
the second PRI and at least a third PRI are both associated with a same UCI payload as the first PRI and are in a same PUCCH resource set; and
the second PRI is selected based on the second PRI having a lower PRI index than the third PRI.
11. An apparatus for wireless communications by a user equipment (UE), comprising:
a memory having executable instructions stored thereon; and
a processor configured to execute the executable instructions in order to cause the apparatus to:
monitor for a semi-persistently scheduled (SPS) physical downlink shared channel (PDSCH);
determine that a first resource, identified by a first physical uplink control channel (PUCCH) resource identifier (PRI), for transmitting a physical uplink control channel (PUCCH) with acknowledgment feedback for the SPS PDSCH collides with a downlink resource;
identify a second resource for transmitting the PUCCH based on parameters associated with the first PRI or a second PRI;
transmit the PUCCH on the second resource; and
wherein the second resource comprises one or more symbols in a same slot as one or more symbols of the first resource.
12. The apparatus of claim 11 , wherein the second resource comprises an earliest available symbol in the same slot.
13. The apparatus of claim 11 , wherein the second resource is identified based on the second PRI.
14. The apparatus of claim 13 , wherein the second PRI is associated with a same uplink control information (UCI) payload as the first PRI.
15. The apparatus of claim 11 , wherein:
the second PRI and at least a third PRI are both associated with a same UCI payload as the first PRI and are in a same PUCCH resource set; and
the second PRI is selected based on the second PRI having a lower PRI index than the third PRI.
16. An apparatus for wireless communications by a network entity, comprising:
a memory having executable instructions stored thereon; and
a processor configured to execute the executable instructions in order to cause the apparatus to:
transmit a semi-persistently scheduled (SPS) physical downlink shared channel (PDSCH) to a user equipment (UE);
determine that a first resource, identified by a first physical uplink control channel (PUCCH) resource identifier (PRI), for receiving a physical uplink control channel (PUCCH) from the UE with acknowledgment feedback for the SPS PDSCH collides with a downlink resource;
identify a second resource for transmitting the PUCCH based on parameters associated with the first PRI or a second PRI;
monitor for the PUCCH on the second resource; and
wherein the second resource comprises one or more symbols in a same slot as one or more symbols of the first resource.
17. The apparatus of claim 16 , wherein the second resource comprises an earliest available symbol in the same slot.
18. The apparatus of claim 16 , wherein the second resource is identified based on the second PRI.
19. The apparatus of claim 18 , wherein the second PRI is associated with a same uplink control information (UCI) payload as the first PRI.
20. The apparatus of claim 16 , wherein:
the second PRI and at least a third PRI are both associated with a same UCI payload as the first PRI and are in a same PUCCH resource set; and
the second PRI is selected based on the second PRI having a lower PRI index than the third PRI.