Systems and techniques for scheduling feedback-less hybrid automatic repeat resource request

Patent metadata

Field	Value
Publication number	US-12549290-B2
Application number	US-202318305263-A
Country	US
Kind code	B2
Filing date	Apr 21, 2023
Priority date	Apr 29, 2022
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

Systems and techniques are provided for wireless communications. For example, an apparatus (e.g., a user equipment (UE)) may receive a plurality of downlink communications, wherein each downlink communication is associated with a Hybrid Automatic Repeat Request (HARQ) process. The apparatus may determine one or more uplink communications, wherein each uplink communication includes feedback associated with at least one downlink communication of the plurality of downlink communications. The apparatus may transmit the one or more uplink communications based on an uplink communication transmission configuration, wherein the uplink communication transmission configuration is determined based on a type of each downlink communication of the plurality of downlink communications.

First claim

What is claimed is:

1 . An apparatus for wireless communications, comprising:
at least one memory; and at least one processor coupled to at least one memory and configured to: receive a plurality of downlink communications, wherein each downlink communication of the plurality of downlink communications is associated with a Hybrid Automatic Repeat Request (HARQ) process; determine one or more uplink communications, wherein each uplink communication of the one or more uplink communications includes feedback associated with at least one downlink communication of the plurality of downlink communications; and transmit the one or more uplink communications based on an uplink communication transmission configuration, wherein the uplink communication transmission configuration is determined based on a type of each downlink communication of the plurality of downlink communications, wherein the plurality of downlink communications includes: one or more feedback-enabled Transport Blocks (TBs), wherein each feedback-enabled TB of the one or more feedback-enabled TBs is associated with a HARQ feedback-enabled process; and one or more feedback-disabled TBs, wherein each feedback-disabled TB of the one or more feedback-disabled TBs is associated with a HARQ feedback-disabled process; wherein the one or more feedback-enabled TBs and the one or more feedback-disabled TBs are received according to a multi-TB scheduling based on a Downlink Control Information (DCI) associated with the multi-TB scheduling.

2 . The apparatus of claim 1 , wherein the plurality of downlink communications includes:
at least one feedback-enabled Transport Block (TB) associated with a first HARQ process; and at least one feedback-disabled TB associated with a second HARQ process; wherein the at least one feedback-enabled TB and the at least one feedback-disabled TB are single-TB scheduled.

3 . The apparatus of claim 2 , wherein the at least one processor is further configured to:
use a DCI override bit to configure the at least one feedback-enabled TB as a feedback-disabled TB; or use the DCI override bit to configure the at least one feedback-disabled TB as a feedback-enabled TB.

4 . The apparatus of claim 3 , wherein the at least one processor is further configured to use the DCI override bit to change a Radio Resource Control (RRC) indicated feedback behavior for the at least one feedback-enabled TB or the at least one feedback-disabled TB, respectively.

5 . The apparatus of claim 4 , wherein the DCI override bit is a HARQ ACK Bundling Flag.

6 . The apparatus of claim 1 , wherein:
the plurality of downlink communications includes one or more feedback-enabled Transport Blocks (TBs), wherein each feedback-enabled TB of the one or more feedback-enabled TBs is associated with a HARQ feedback-enabled process; and the one or more feedback-enabled TBs are received according to a multi-TB scheduling based on a Downlink Control Information (DCI) associated with the multi-TB scheduling.

7 . The apparatus of claim 6 , wherein:
the one or more uplink communications include a HARQ feedback determined for each feedback-enabled TB of the one or more feedback-enabled TBs; and a first uplink slot of the uplink communication transmission configuration is later than a last downlink slot associated with receiving the one or more feedback-enabled TBs using the multi-TB scheduling.

8 . The apparatus of claim 1 , wherein:
the plurality of downlink communications includes one or more feedback-disabled Transport Blocks (TBs), wherein each feedback-disabled TB is associated with a HARQ feedback-disabled process; the one or more feedback-disabled TBs are received using a multi-TB scheduling based on a Downlink Control Information (DCI) associated with the multi-TB scheduling; and the one or more uplink communications do not include feedback associated with the one or more feedback-disabled TBs.

9 . The apparatus of claim 1 , wherein:
the multi-TB scheduling includes the one or more feedback-enabled TBs before the one or more feedback-disabled TBs; and a last transmission time interval associated with the one or more feedback-enabled TBs is earlier than a first transmission time interval associated with the one or more feedback-disabled TBs.

10 . The apparatus of claim 9 , wherein:
the one or more uplink communications include a respective HARQ feedback determined for each feedback-enabled TB of the one or more feedback-enabled TBs; and at least a portion of the one or more uplink communications are transmitted after the last transmission time interval associated with the one or more feedback-enabled TBs.

11 . The apparatus of claim 1 , wherein the one or more uplink communications include:
a respective HARQ feedback determined for each feedback-enabled TB of the one or more feedback-enabled TBs; and a respective placeholder feedback determined for each feedback-disabled TB of the one or more feedback-disabled TBs.

12 . The apparatus of claim 11 , wherein the at least one processor is further configured to:
determine the uplink communication transmission configuration based on a relative order associated with receiving the one or more feedback-enabled TBs and the one or more feedback-disabled TBs; and transmit the HARQ feedback and the placeholder feedback using a same relative order associated with receiving the one or more feedback-enabled TBs and the one or more feedback-disabled TBs.

13 . The apparatus of claim 1 , wherein the one or more uplink communications include a HARQ feedback determined for each feedback-enabled TB of the one or more feedback-enabled TBs and do not include feedback associated with the one or more feedback-disabled TBs, and wherein the at least one processor is further configured to:
determine the uplink communication transmission configuration based on a relative order associated with receiving the one or more feedback-enabled TBs and the one or more feedback-disabled TBs; wherein the uplink communication transmission configuration is determined by:
for each feedback-enabled TB included in the relative order, generating a HARQ feedback transmission time interval associated with a HARQ feedback determined for the feedback-enabled TB; and
for each feedback-disabled TB included in the relative order, generating an empty uplink transmission time interval associated with the feedback-disabled TB.

14 . The apparatus of claim 1 , wherein:
the one or more feedback-enabled TBs and the one or more feedback-disabled TBs are received as one or more TB bundles, wherein each feedback-enabled TB and each feedback-disabled TB is included in only one TB bundle of the one or more TB bundles; and the one or more TB bundles include at least one of:
a feedback-enabled TB bundle, wherein each feedback-enabled TB bundle includes at least one feedback-enabled TB; and
a feedback-disabled TB bundle, wherein each feedback-disabled TB bundle does not include any feedback-enabled TB.

15 . The apparatus of claim 14 , wherein to determine the one or more uplink communications, the at least one processor is further configured to, for each feedback-enabled TB bundle of the one or more TB bundles:
generate a respective HARQ feedback for each feedback-enabled TB included in the feedback-enabled TB bundle; generate a respective placeholder feedback for each feedback-disabled TB included in the feedback-enabled TB bundle; and determine a bundled HARQ feedback based on each HARQ feedback and each placeholder feedback, wherein the one or more uplink communications include the bundled HARQ feedback.

Assignees

• Qualcomm Inc

Inventors

• Sengupta Ayan
• Rico Alvarino Alberto
• Shrestha Bharat
• Liu Le
• Wang Xiao Feng
• Ma Liangping
• Phuyal Umesh

Classifications

• H04W72/1273

  of downlink data flows · CPC title

• H04L1/1874

  Buffer management · CPC title

• H04W72/232

  the control data signalling from the physical layer, e.g. DCI signalling · CPC title

• H04L5/0055

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04L1/1896

  ARQ related signaling · CPC title