Out of order hybrid automatic repeat request (HARQ) transmission in presence of deferred semi-persistently scheduled (SPS) physical uplink control channel (PUCCH) HARQ

Inventors: Konstantinos Dimou (New York City, NY); Tao Luo (San Diego, CA); Yi Huang (San Diego, CA); Peter Gaal (San Diego, CA); Seyedkianoush Hosseini (San Diego, CA); Yan Zhou (San Diego, CA); Wanshi Chen (San Diego, CA)

Assignee: QUALCOMM Incorporated

H04L1/1854 H04L1/1861 H04W72/52 H04W72/23

View Patent ↗

Loading inventors, assignments & file history…

Monitor This Case

Get email alerts when status or documents change.

Order Certified Copies

Most orders are placed with the USPTO same day — all within 24 business hours.

Order via The Patent Place →

Pre-filled with this patent's details

Quick Facts

Patent No.: US 12683721
App. No.: 17/659,323
Granted: Jul 14, 2026
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

Abstract

Certain aspects of the present disclosure provide a method for wireless communications by a user equipment (UE). The UE determines that a scheduled occasion for reporting hybrid automatic repeat request (HARQ) feedback for a first semi-persistently scheduled (SPS) physical downlink shared channel (PDSCH) of a first HARQ process identifier (ID) overlaps with at least one downlink or flexible symbol. The UE reports, defers, or drops the HARQ feedback for the first SPS PDSCH if resources for reporting the HARQ feedback for the first SPS PDSCH are not available until on or after a scheduled occasion for reporting a HARQ feedback for a second PDSCH of the same first HARQ process ID, in response to the determining.

Claims (36)

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

determining a scheduled occasion for reporting a hybrid automatic repeat request (HARQ) feedback for a first semi-persistently scheduled (SPS) physical downlink shared channel (PDSCH) of a first HARQ process identifier (ID) overlaps with at least one downlink or flexible symbol;

deferring the HARQ feedback for the first SPS PDSCH based on the determining; and

dropping the HARQ feedback for the first SPS PDSCH when resources for reporting the HARQ feedback for the first SPS PDSCH are not available until on or after a scheduled occasion for reporting a HARQ feedback for a second PDSCH of the same first HARQ process ID.

2 . The method of claim 1 , wherein the dropping is based on the resources for reporting the HARQ feedback for the first SPS PDSCH not being available until a threshold amount of time after the scheduled occasion for reporting the HARQ feedback for the first SPS PDSCH.

3 . The method of claim 1 , wherein the dropping is based on the resources for reporting the HARQ feedback for the first SPS PDSCH not being available until on or after an occasion for reporting a HARQ feedback for a subsequent SPS PDSCH.

4 . The method of claim 1 , further comprising sending a request, to a network entity, to not send a dynamic grant for PDSCH transmissions with a same HARQ process ID as the first SPS PDSCH.

5 . The method of claim 1 , wherein the second PDSCH is scheduled via a dynamic grant.

6 . A method for wireless communications at a network entity, comprising:

transmitting a first semi-persistently scheduled (SPS) physical downlink shared channel (PDSCH) of a first hybrid automatic repeat request (HARQ) process identifier (ID) to a user equipment (UE);

transmitting a second PDSCH of the first HARQ process ID to the UE before receipt of HARQ feedback from the UE for the first SPS PDSCH;

receiving a HARQ feedback and a bit on or after a scheduled occasion for reporting HARQ feedback for the second PDSCH, wherein the bit indicates the received HARQ feedback is for the first SPS PDSCH or the second PDSCH; and

deciding, based on the bit, whether the received HARQ feedback is for the first SPS PDSCH or the second PDSCH.

7 . The method of claim 6 , further comprising receiving an indication from the UE indicating the received HARQ feedback is for the first SPS PDSCH or the second PDSCH.

8 . The method of claim 6 , further comprising receiving a request, from the UE, to not send a dynamic grant for PDSCH transmissions with a same HARQ process ID as the first SPS PDSCH.

9 . The method of claim 6 , wherein the second PDSCH is scheduled via a dynamic grant.

10 . An apparatus for wireless communications at a user equipment (UE), comprising:

a memory comprising instructions; and

one or more processors, individually or collectively, configured to execute the instructions and cause the apparatus to:

determine a scheduled occasion for reporting a hybrid automatic repeat request (HARQ) feedback for a first semi-persistently scheduled (SPS) physical downlink shared channel (PDSCH) of a first HARQ process identifier (ID) overlaps with at least one downlink or flexible symbol;

defer the HARQ feedback for the first SPS PDSCH based on the determination; and

drop the HARQ feedback for the first SPS PDSCH when resources for reporting the HARQ feedback for the first SPS PDSCH are not available until on or after a scheduled occasion for reporting a HARQ feedback for a second PDSCH of the same first HARQ process ID.

11 . The apparatus of claim 10 , wherein the one or more processors, individually or collectively, are configured to execute the instructions and cause the apparatus to drop the HARQ feedback for the first SPS PDSCH based on the resources for reporting the HARQ feedback for the first SPS PDSCH not being available until a threshold amount of time after the scheduled occasion for reporting the HARQ feedback for the first SPS PDSCH.

12 . The apparatus of claim 10 , wherein the one or more processors, individually or collectively, are configured to execute the instructions and cause the apparatus to drop the HARQ feedback for the first SPS PDSCH based on the resources for reporting the HARQ feedback for the first SPS PDSCH not being available until on or after an occasion for reporting a HARQ feedback for a subsequent SPS PDSCH.

13 . The apparatus of claim 10 , wherein the one or more processors, individually or collectively, are configured to execute the instructions and cause the apparatus to send a request, to a network entity, to not send a dynamic grant for PDSCH transmissions with a same HARQ process ID as the first SPS PDSCH.

14 . The apparatus of claim 10 , wherein the second PDSCH is scheduled via a dynamic grant.

15 . An apparatus for wireless communications at a network entity, comprising:

a memory comprising instructions; and

one or more processors, individually or collectively, configured to execute the instructions and cause the apparatus to:

transmit a first semi-persistently scheduled (SPS) physical downlink shared channel (PDSCH) of a first hybrid automatic repeat request (HARQ) process identifier (ID) to a user equipment (UE);

transmit a second PDSCH of the first HARQ process ID to the UE before receipt of HARQ feedback from the UE for the first SPS PDSCH;

receive a HARQ feedback and a bit on or after a scheduled occasion for reporting HARQ feedback for the second PDSCH, wherein the bit indicates the received HARQ feedback is for the first SPS PDSCH or the second PDSCH; and

decide, based on the bit, whether the received HARQ feedback is for the first SPS PDSCH or the second PDSCH.

16 . The apparatus of claim 15 , wherein the one or more processors, individually or collectively, are configured to execute the instructions and cause the apparatus to receive an indication from the UE indicating the received HARQ feedback is for the first SPS PDSCH or the second PDSCH.

17 . The apparatus of claim 15 , wherein the one or more processors, individually or collectively, are configured to execute the instructions and cause the apparatus to receive a request, from the UE, to not send a dynamic grant for PDSCH transmissions with a same HARQ process ID as of the first SPS PDSCH.

18 . The apparatus of claim 15 , wherein the second PDSCH is scheduled via a dynamic grant.