IP Library › Granted Patent US 12695550

Granted Patent B2

US 12695550 · App. 18/533,712 · Granted Jul 28, 2026

Hybrid automatic repeat request feedback for high throughput use cases

Inventors: Wei Yang (San Diego, CA); Chih-Hao Liu (San Diego, CA); Jing Sun (San Diego, CA); Junyi Li (Fairless Hills, PA)

Assignee: QUALCOMM Incorporated

H04L1/1854 H04W72/1273 H04W72/21

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Quick Facts

Patent No.: US 12695550
App. No.: 18/533,712
Granted: Jul 28, 2026
Kind: B2

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Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, a downlink grant scheduling a physical downlink shared channel (PDSCH) transmission that includes a transport block (TB) associated with a first hybrid automatic repeat request (HARQ) acknowledgment (HARQ-ACK) feedback occasion and a second HARQ-ACK feedback occasion, wherein the downlink grant schedules at least the first HARQ-ACK feedback occasion associated with the TB. The UE may transmit, to the network node, HARQ feedback for the TB in one or more of the first HARQ-ACK feedback occasion or the second HARQ-ACK feedback occasion associated with the TB. Numerous other aspects are described.

Claims (51)

1 . A user equipment (UE) for wireless communication, comprising:

one or more memories; and

one or more processors, coupled to the one or more memories, configured to cause the UE to:

receive, from a network node, a downlink grant scheduling a physical downlink shared channel (PDSCH) transmission that includes a transport block (TB) associated with a first hybrid automatic repeat request (HARQ) acknowledgment (HARQ-ACK) feedback occasion and a second HARQ-ACK feedback occasion, wherein the downlink grant schedules at least the first HARQ-ACK feedback occasion associated with the TB; and

transmit, to the network node, HARQ feedback for the TB in one or more of the first HARQ-ACK feedback occasion or the second HARQ-ACK feedback occasion associated with the TB, wherein the HARQ feedback includes n-state feedback, and wherein a set of possible states associated with the n-state feedback includes an acknowledgement (ACK), a negative acknowledgement (NACK), and a pending state.

2 . The UE of claim 1 , wherein the first HARQ-ACK feedback occasion is associated with a default processing time for the TB, and wherein the second HARQ-ACK feedback occasion is associated with a delayed processing time for the TB.

3 . The UE of claim 1 , wherein the HARQ feedback is not transmitted in the second HARQ-ACK feedback occasion based on the HARQ feedback including the ACK, wherein the ACK is transmitted in the first HARQ-ACK feedback occasion.

4 . The UE of claim 1 , wherein the HARQ feedback includes the ACK, wherein the ACK is transmitted in the first HARQ-ACK feedback occasion and a repetition of the ACK is multiplexed with additional uplink control information (UCI) in the second HARQ-ACK feedback occasion.

5 . The UE of claim 1 , wherein the HARQ feedback includes the NACK, wherein the NACK is multiplexed with additional uplink control information (UCI) in the first HARQ-ACK feedback occasion based on an attempted decoding for the TB being incomplete at a time of the first HARQ-ACK feedback occasion.

6 . The UE of claim 1 , wherein the first HARQ-ACK feedback occasion is skipped based on an attempted decoding for the TB being incomplete at a time of the first HARQ-ACK feedback occasion.

7 . The UE of claim 1 , wherein the HARQ feedback is transmitted in the second HARQ-ACK feedback occasion based on an attempted decoding for the TB being incomplete at a time of the first HARQ-ACK feedback occasion.

8 . The UE of claim 1 , wherein the HARQ feedback includes the NACK, wherein the NACK is transmitted in the first HARQ-ACK feedback occasion and the ACK is transmitted in the second HARQ-ACK feedback occasion.

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

receive, from the network node, information configuring a group of physical uplink control channel (PUCCH) resources that includes the first HARQ-ACK feedback occasion and the second HARQ-ACK feedback occasion.

10 . The UE of claim 1 , wherein the first HARQ-ACK feedback occasion and the second HARQ-ACK feedback occasion are indicated in the downlink grant.

11 . The UE of claim 1 , wherein the first HARQ-ACK feedback occasion is indicated in the downlink grant and the second HARQ-ACK feedback occasion is derived from the first HARQ-ACK feedback occasion.

12 . The UE of claim 1 , wherein the first HARQ-ACK feedback occasion and the second HARQ-ACK feedback occasion are configured based on the PDSCH transmission corresponding to a retransmission of the TB.

13 . The UE of claim 1 , wherein the ACK indicates that the TB was correctly decoded, the NACK indicates decoding failed for the TB, and the pending state indicates that additional time is needed to attempt decoding for the TB.

14 . The UE of claim 1 , wherein the HARQ feedback includes a time offset value to indicate an amount of time needed to finish attempted decoding for the TB when the HARQ feedback includes the pending state, wherein the pending state indicates that additional time is needed to attempt decoding for the TB.

15 . The UE of claim 1 , wherein the one or more processors are further configured to cause the UE to:

receive, from the network node, information scheduling the second HARQ-ACK feedback occasion associated with the TB in a slot that is subsequent to a slot in which the HARQ feedback is transmitted based on the HARQ feedback including the pending state, wherein the pending state indicates that additional time is needed to attempt decoding for the TB; and

transmit, to the network node, HARQ feedback indicating a final decoding result for the TB in the second HARQ-ACK feedback occasion.

16 . The UE of claim 1 , wherein the HARQ feedback includes the n-state feedback based on the TB corresponding to a HARQ retransmission, and wherein n is greater than two.

17 . The UE of claim 1 , wherein the n-state feedback is multiplexed with two-state HARQ feedback, where n is greater than two.

18 . The UE of claim 1 , wherein the one or more processors are further configured to cause the UE to:

transmit, in the first HARQ-ACK feedback occasion, the ACK; and

receive a new TB associated with a HARQ process corresponding to the TB associated with the ACK prior to the second HARQ-ACK feedback occasion.

19 . A network node for wireless communication, comprising:

one or more memories; and

one or more processors, coupled to the one or more memories, configured to cause the network node to:

transmit, to a user equipment (UE), a downlink grant scheduling a physical downlink shared channel (PDSCH) transmission that includes a transport block (TB) associated with a first hybrid automatic repeat request (HARQ) acknowledgment (HARQ-ACK) feedback occasion and a second HARQ-ACK feedback occasion, wherein the downlink grant schedules at least the first HARQ-ACK feedback occasion associated with the TB; and

receive, from the UE, HARQ feedback for the TB in one or more of the first HARQ-ACK feedback occasion or the second HARQ-ACK feedback occasion associated with the TB, wherein the HARQ feedback includes n-state feedback, and wherein a set of possible states associated with the n-state feedback includes an acknowledgement (ACK), a negative acknowledgement (NACK), and a pending state.

20 . The network node of claim 19 , wherein the first HARQ-ACK feedback occasion is associated with a default processing time for the TB, and wherein the second HARQ-ACK feedback occasion is associated with a delayed processing time for the TB.

21 . The network node of claim 19 , wherein the HARQ feedback is not transmitted in the second HARQ-ACK feedback occasion based on the HARQ feedback including the ACK, wherein the ACK is transmitted in the first HARQ-ACK feedback occasion.

22 . The network node of claim 19 , wherein the HARQ feedback includes the ACK, wherein the ACK is transmitted in the first HARQ-ACK feedback occasion and a repetition of the ACK is multiplexed with additional uplink control information (UCI) in the second HARQ-ACK feedback occasion.

23 . The network node of claim 19 , wherein the HARQ feedback includes the NACK, wherein the NACK is multiplexed with additional uplink control information (UCI) in the first HARQ-ACK feedback occasion based on an attempted decoding for the TB being incomplete at a time of the first HARQ-ACK feedback occasion.

24 . The network node of claim 19 , wherein the first HARQ-ACK feedback occasion is skipped based on an attempted decoding for the TB being incomplete at a time of the first HARQ-ACK feedback occasion.

25 . The network node of claim 19 , wherein the HARQ feedback is transmitted in the second HARQ-ACK feedback occasion based on an attempted decoding for the TB being incomplete at a time of the first HARQ-ACK feedback occasion.

26 . The network node of claim 19 , wherein the one or more processors are further configured to cause the network node to:

receive, in the first HARQ-ACK feedback occasion, the ACK; and

transmit a new TB associated with a HARQ process corresponding to the TB associated with the ACK prior to the second HARQ-ACK feedback occasion.

27 . The network node of claim 19 , wherein the ACK indicates that the TB was correctly decoded, the NACK indicates decoding failed for the TB, and the pending state indicates that additional time is needed to attempt decoding for the TB.

28 . The network node of claim 19 , wherein the one or more processors are further configured to cause the network node to:

transmit, to the UE, information scheduling the second HARQ-ACK feedback occasion associated with the TB in a slot that is subsequent to a slot in which the HARQ feedback is transmitted based on the HARQ feedback including the pending state to indicate that additional time is needed to attempt decoding for the TB; and

receive, from the UE, HARQ feedback indicating a final decoding result for the TB in the second HARQ-ACK feedback occasion.

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

receiving, from a network node, a downlink grant scheduling a physical downlink shared channel (PDSCH) transmission that includes a transport block (TB) associated with a first hybrid automatic repeat request (HARQ) acknowledgment (HARQ-ACK) feedback occasion and a second HARQ-ACK feedback occasion, wherein the downlink grant schedules at least the first HARQ-ACK feedback occasion associated with the TB; and

transmitting, to the network node, HARQ feedback for the TB in one or more of the first HARQ-ACK feedback occasion or the second HARQ-ACK feedback occasion associated with the TB, wherein the HARQ feedback includes n-state feedback, and wherein a set of possible states associated with the n-state feedback includes an acknowledgement (ACK), a negative acknowledgement (NACK), and a pending state.

30 . A method of wireless communication performed by a network node, comprising:

transmitting, to a user equipment (UE), a downlink grant scheduling a physical downlink shared channel (PDSCH) transmission that includes a transport block (TB) associated with a first hybrid automatic repeat request (HARQ) acknowledgment (HARQ-ACK) feedback occasion and a second HARQ-ACK feedback occasion, wherein the downlink grant schedules at least the first HARQ-ACK feedback occasion associated with the TB; and

receiving, from the UE, HARQ feedback for the TB in one or more of the first HARQ-ACK feedback occasion or the second HARQ-ACK feedback occasion associated with the TB, wherein the HARQ feedback includes n-state feedback, and wherein a set of possible states associated with the n-state feedback includes an acknowledgement (ACK), a negative acknowledgement (NACK), and a pending state.