IP Library › Granted Patent US 11,950,238

Granted Patent B2

US 11,950,238 · App. 17/400,802 · Granted Apr 2, 2024

Techniques for a delay-imposed HARQ-ACK/NACK reporting

Inventors: Ahmed Elshafie (San Diego, CA); Yi Huang (San Diego, CA); Hwan Joon Kwon (San Diego, CA)

Assignee: QUALCOMM Incorporated

H04W72/21 H04L1/1635 H04L1/1678 H04L5/0055 H04W72/0446

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Quick Facts

Patent No.: US 11,950,238
App. No.: 17/400,802
Granted: Apr 2, 2024
Kind: B2

External Links

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Abstract

Aspects of the present disclosure provide techniques to expedite transmissions of hybrid automatic repeat request (HARQ) acknowledgment or negative acknowledgment (ACK/NACK) feedbacks based on delay constraints associated with at least semi-persistent scheduling (SPS) downlink packets received at the user equipment (UE). Specifically, in accordance with aspects of the present disclosure, each of the one or more SPS PDSCH configurations may be associated with a delay parameter that identifies the maximum amount of time or slots that the UE can wait prior to transmitting the HARQ-ACK/NACK feedback associated with the PDSCH received at the UE.

Claims (85)

1. A method of wireless communication performed by a user equipment (UE), comprising:

receiving a plurality of semi-persistent scheduling (SPS) downlink packets from a base station;

accumulating a plurality of hybrid automatic repeat request (HARQ) acknowledgment or negative acknowledgment (ACK/NACK) feedbacks associated with each of the plurality of SPS downlink packets in a buffer prior to availability of one or more uplink slots;

determining whether a delay constraint for one or more HARQ-ACK/NACK feedbacks from the plurality of HARQ-ACK/NACK feedbacks exceeds a delay parameter value associated the plurality of SPS downlink packets;

prioritizing transmission of the one or more HARQ-ACK/NACK feedbacks based on a priority value associated with the plurality of SPS downlink packets; and

2. The method of claim 1 , wherein determining whether the delay constraint for the one or more HARQ-ACK/NACK feedbacks exceeds the delay parameter value associated the plurality of SPS downlink packets comprises:

determining a number of slots that each of the plurality of HARQ-ACK/NACK feedbacks have been queued in the buffer since being received at the UE prior to the first uplink slot becoming available; and

determining whether the number of slots that the one or more HARQ-ACK/NACK feedbacks from the plurality of HARQ-ACK/NACK feedbacks have been queued in the buffer exceeds the delay parameter value for each of the plurality of HARQ-ACK/NACK feedbacks.

3. The method of claim 1 , further comprising:

delaying transmission of the one or more HARQ-ACK/NACK feedbacks for which the delay constraint does not exceed the delay parameter value until at least a second uplink slot.

4. The method of claim 1 , wherein accumulating the plurality of HARQ-ACK/NACK feedbacks associated with each of the plurality of SPS downlink packets in the buffer prior to availability of the one or more uplink slots comprises:

queuing the plurality of HARQ-ACK/NACK feedbacks within the buffer based on the delay constraint.

5. The method of claim 1 , wherein accumulating the plurality of HARQ-ACK/NACK feedbacks associated with each of the plurality of SPS downlink packets in the buffer prior to availability of the one or more uplink slots comprises:

queuing the plurality of HARQ-ACK/NACK feedbacks within the buffer based on a first-in-first-out time that the SPS downlink packets are received at the UE.

6. A method of wireless communication performed by a user equipment (UE), comprising:

receiving a plurality of semi-persistent scheduling (SPS) downlink packets from a base station;

accumulating a plurality of hybrid automatic repeat request (HARD) acknowledgment or negative acknowledgment (ACK/NACK) feedbacks associated with each of the plurality of SPS downlink packets in a buffer prior to availability of one or more uplink slots;

transmitting, during a first uplink slot, a consolidated feedback packet to the base station that includes the one or more HARQ-ACK/NACK feedbacks for which the delay constraint exceeds the delay parameter value, wherein transmitting the consolidated feedback packet to the base station during the first uplink slot comprises:

determining a maximum number of HARQ-ACK/NACK feedbacks that the UE is configured to bundle for a single uplink slot;

determining that a number of HARQ-ACK/NACK feedbacks for which the delay constraint exceeds the delay parameter value is greater than the maximum number of HARQ-ACK/NACK feedbacks that the UE is configured to bundle; and

overriding the maximum number of HARQ-ACK/NACK feedbacks that the UE is configured to bundle for the single uplink slot.

7. The method of claim 6 , further comprising:

receiving, from the base station, a configuration of the maximum number of HARQ-ACK/NACK feedbacks that the UE is configured to bundle via one or more of radio resource control (RRC) signaling, media access control element (MAC-CE) signaling, or dynamic downlink control information (DCI).

8. An apparatus for wireless communication, comprising:

at least one processor; and

and memory coupled to the at least one processor, wherein the at least one processor is configured to:

receive a plurality of semi-persistent scheduling (SPS) downlink packets from a base station;

accumulate a plurality of hybrid automatic repeat request (HARQ) acknowledgment or negative acknowledgment (ACK/NACK) feedbacks associated with each of the plurality of SPS downlink packets in a buffer prior to availability of one or more uplink slots;

determine whether a delay constraint for one or more HARQ-ACK/NACK feedbacks from the plurality of HARQ-ACK/NACK feedbacks exceeds a delay parameter value associated the plurality of SPS downlink packets;

prioritize transmission of the one or more HARQ-ACK/NACK feedbacks based on a priority value associated with the plurality of SPS downlink packets; and

9. The apparatus of claim 8 , wherein, to determine whether the delay constraint for the one or more HARQ-ACK/NACK feedbacks exceeds the delay parameter value associated the plurality of SPS downlink packets, the at least one processor is configured to:

determine a number of slots that each of the plurality of HARQ-ACK/NACK feedbacks have been queued in the buffer prior to the first uplink slot becoming available; and

determine whether the number of slots that the one or more HARQ-ACK/NACK feedbacks from the plurality of HARQ-ACK/NACK feedbacks have been queued in the buffer exceeds the delay parameter value for each of the plurality of HARQ-ACK/NACK feedbacks.

10. The apparatus of claim 8 , wherein the at least one processor is configured to:

delay transmission of the one or more HARQ-ACK/NACK feedbacks for which the delay constraint does not exceed the delay parameter value until at least a second uplink slot.

11. The apparatus of claim 8 , wherein, to accumulate the plurality of HARQ-ACK/NACK feedbacks associated with each of the plurality of SPS downlink packets in the buffer prior to availability of the one or more uplink slots, the at least one processor is configured to:

queue the plurality of HARQ-ACK/NACK feedbacks within the buffer based on the delay constraint.

12. The apparatus of claim 8 , wherein, to accumulate the plurality of HARQ-ACK/NACK feedbacks associated with each of the plurality of SPS downlink packets in the buffer prior to availability of the one or more uplink slots, the at least one processor is configured to:

queue the plurality of HARQ-ACK/NACK feedbacks within the buffer based on a first-in-first-out time that the SPS downlink packets are received.

13. An apparatus for wireless communication, comprising:

at least one processor; and

and memory coupled to the at least one processor, wherein the at least one processor is configured to:

receive a plurality of semi-persistent scheduling (SPS) downlink packets from a base station;

transmit, during a first uplink slot, a consolidated feedback packet to the base station that includes the one or more HARQ-ACK/NACK feedbacks for which the delay constraint exceeds the delay parameter value, wherein, to transmit the consolidated feedback packet to the base station during the first uplink slot, the at least one processor is configured to:

determine a maximum number of HARQ-ACK/NACK feedbacks for bundling for a single uplink slot;

determine that a number of HARQ-ACK/NACK feedbacks for which the delay constraint exceeds the delay parameter value is greater than the maximum number of HARQ-ACK/NACK feedbacks; and

override the maximum number of HARQ-ACK/NACK feedbacks.

14. The apparatus of claim 13 , wherein the at least one processor is configured to receive a configuration of the maximum number of HARQ-ACK/NACK feedbacks via one or more of radio resource control (RRC) signaling, media access control element (MAC-CE) signaling, or dynamic downlink control information (DCI).

15. A method of wireless communication performed by a user equipment (UE), comprising:

receiving a plurality of semi-persistent scheduling (SPS) downlink packets from a base station;

prioritizing transmission of the one or more HARQ-ACK/NACK feedbacks based on the delay constraint associated with the plurality of SPS downlink packets; and

16. The method of claim 15 , wherein determining whether the delay constraint for the one or more HARQ-ACK/NACK feedbacks exceeds the delay parameter value associated the plurality of SPS downlink packets comprises:

17. The method of claim 15 , further comprising:

delaying transmission of the one or more HARQ-ACK/NACK feedbacks for which the delay constraint does not exceed the delay parameter value until at least a second uplink slot.

18. The method of claim 15 , wherein accumulating the plurality of HARQ-ACK/NACK feedbacks associated with each of the plurality of SPS downlink packets in the buffer prior to availability of the one or more uplink slots comprises:

queuing the plurality of HARQ-ACK/NACK feedbacks within the buffer based on the delay constraint.

19. The method of claim 15 , wherein accumulating the plurality of HARQ-ACK/NACK feedbacks associated with each of the plurality of SPS downlink packets in the buffer prior to availability of the one or more uplink slots comprises:

queuing the plurality of HARQ-ACK/NACK feedbacks within the buffer based on a first-in-first-out time that the SPS downlink packets are received at the UE.

20. An apparatus for wireless communication, comprising:

at least one processor; and

and memory coupled to the at least one processor, wherein the at least one processor is configured to:

receive a plurality of semi-persistent scheduling (SPS) downlink packets from a base station;

prioritize transmission of the one or more HARQ-ACK/NACK feedbacks based on the delay constraint associated with the plurality of SPS downlink packets; and

21. The apparatus of claim 20 , wherein, to determine whether the delay constraint for the one or more HARQ-ACK/NACK feedbacks exceeds the delay parameter value associated the plurality of SPS downlink packets, the at least one processor is configured to:

determine a number of slots that each of the plurality of HARQ-ACK/NACK feedbacks have been queued in the buffer prior to the first uplink slot becoming available; and

22. The apparatus of claim 20 , wherein the at least one processor is configured to:

delay transmission of the one or more HARQ-ACK/NACK feedbacks for which the delay constraint does not exceed the delay parameter value until at least a second uplink slot.

23. The apparatus of claim 20 , wherein, to accumulate the plurality of HARQ-ACK/NACK feedbacks associated with each of the plurality of SPS downlink packets in the buffer prior to availability of the one or more uplink slots, the at least one processor is configured to:

queue the plurality of HARQ-ACK/NACK feedbacks within the buffer based on the delay constraint.

24. The apparatus of claim 20 , wherein, to accumulate the plurality of HARQ-ACK/NACK feedbacks associated with each of the plurality of SPS downlink packets in the buffer prior to availability of the one or more uplink slots, the at least one processor is configured to:

queue the plurality of HARQ-ACK/NACK feedbacks within the buffer based on a first-in-first-out time that the SPS downlink packets are received.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 29, 2021

From: ELSHAFIE, AHMED; HUANG, YI; KWON, HWAN JOON

To: QUALCOMM INCORPORATED

Reel/Frame 058500/0959 →

Continuity (2)

Provisional Application 63076727 · Sep 10, 2020

Related Publication 20220078832A1 · Mar 10, 2022

Cited By (1)

US 12,273,201