IP Library › Granted Patent US 12696247
Granted Patent B2
US 12696247 · App. 18/325,716 · Granted Jul 28, 2026

Techniques for sidelink feedback channel slot format for mini-slot channel access

Inventors: Chih-Hao Liu (San Diego, CA); Giovanni Chisci (San Diego, CA); Jing Sun (San Diego, CA); Xiaoxia Zhang (San Diego, CA)
Assignee: QUALCOMM Incorporated
H04W72/0446H04L5/0053H04W72/25H04W72/40
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Quick Facts
Patent No.
US 12696247
App. No.
18/325,716
Granted
Jul 28, 2026
Kind
B2
Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a sidelink slot format, wherein the sidelink slot format indicates a configuration of sidelink feedback resources. The UE may measure a signal, associated with a channel access procedure, after a first symbol of a first sidelink slot and prior to a mini-slot of the first sidelink slot, and wherein the sidelink slot format indicates that the first sidelink slot is associated with the sidelink feedback resources. The UE may transmit, using a transmission starting location of the mini-slot or of a symbol of a second sidelink slot, a sidelink communication based at least in part on the measurement of the signal, wherein a format of the sidelink feedback resources is based at least in part on the transmission starting location. Numerous other aspects are described.

Claims (77)

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

receiving an indication of a sidelink slot format,

wherein the sidelink slot format indicates a configuration of sidelink feedback resources, and

wherein the sidelink slot format is associated with a plurality of starting locations that include a first symbol of a first sidelink slot and a second symbol of the first sidelink slot;

measuring a signal associated with a channel access procedure,

wherein the measurement of the signal indicates that the UE is permitted to access a sidelink channel,

wherein the measurement of the signal occurs after the first symbol of the first sidelink slot and prior to the second symbol of the first sidelink slot, and

wherein the sidelink slot format indicates that the first sidelink slot is associated with the sidelink feedback resources; and

transmitting, using the second symbol of the first sidelink slot or a symbol of a second sidelink slot as a transmission starting location, a sidelink communication based at least in part on the measurement of the signal,

wherein a format of the sidelink feedback resources is based at least in part on the transmission starting location.

2 . The method of claim 1 , wherein the transmission starting location is the second symbol of the first sidelink slot, and wherein the format of the sidelink feedback resources indicates that the sidelink feedback resources are associated with a sidelink data channel based at least in part on the transmission starting location being the second symbol of the first sidelink slot.

3 . The method of claim 1 , wherein transmitting the sidelink communication comprises:

transmitting data associated with the sidelink communication using one or more symbols associated with the sidelink feedback resources as indicated by the sidelink slot format.

4 . The method of claim 1 , wherein the transmission starting location is in the symbol of the second sidelink slot based at least in part on the first sidelink slot being associated with the sidelink feedback resources.

5 . The method of claim 1 , further comprising:

refraining from using the second symbol of the first sidelink slot as the transmission starting location based at least in part on the first sidelink slot being associated with the sidelink feedback resources.

6 . The method of claim 1 , wherein transmitting the sidelink communication comprises:

refraining, for the first sidelink slot, from using mini-slot scheduling based on the first sidelink slot being associated with the sidelink feedback resources.

7 . The method of claim 1 , wherein mini-slot access is disabled for the first sidelink slot based on the first sidelink slot being associated with the sidelink feedback resources, and wherein the transmission starting location is the symbol of the second sidelink slot based on mini-slot access being disabled for the first sidelink slot.

8 . The method of claim 1 , wherein an available transmission starting location for the first sidelink slot is only the first symbol of the first sidelink slot based on the first sidelink slot being associated with the sidelink feedback resources.

9 . The method of claim 1 , wherein the transmission starting location is in the symbol of the second sidelink slot, and wherein a timing associated with hybrid automatic repeat request feedback for the sidelink communication is based at least in part on the first symbol of the first sidelink slot.

10 . The method of claim 1 , wherein the sidelink feedback resources are associated with a physical sidelink feedback channel (PSFCH).

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

one or more antennas; and

a processing system that includes one or more processors and one or more memories that store code and are coupled with the one or more processors, the processing system configured to cause the UE to:

receive an indication of a sidelink slot format,

wherein the sidelink slot format indicates a configuration of sidelink feedback resources, and

wherein the sidelink slot format is associated with a plurality of starting locations that include a first symbol of a first sidelink slot and a second symbol of the first sidelink slot;

measure a signal associated with a channel access procedure,

wherein the measurement of the signal indicates that the UE is permitted to access a sidelink channel,

wherein the measurement of the signal occurs after the first symbol of the first sidelink slot and prior to the second symbol of the first sidelink slot, and

wherein the sidelink slot format indicates that the first sidelink slot is associated with the sidelink feedback resources; and

transmit, using the second symbol of the first sidelink slot or a symbol of a second sidelink slot as a transmission starting location, a sidelink communication based at least in part on the measurement of the signal,

wherein a format of the sidelink feedback resources is based at least in part on the transmission starting location.

12 . The UE of claim 11 , wherein the format of the sidelink feedback resources indicates that the sidelink feedback resources are included in the first sidelink slot based at least in part on the transmission starting location being the second symbol of the first sidelink slot.

13 . The UE of claim 12 , wherein the format of the sidelink feedback resources indicates that a first one or more symbols of the first sidelink slot are associated with the sidelink feedback resources and a second one or more symbols of the first sidelink slot are associated with an automatic gain control (AGC) operation for a sidelink feedback channel.

14 . The UE of claim 11 , wherein the transmission starting location is in the symbol of the second sidelink slot based at least in part on the first sidelink slot being associated with the sidelink feedback resources.

15 . The UE of claim 11 , wherein the one or more processors are further configured to:

refrain from using the second symbol of the first sidelink slot as the transmission starting location based at least in part on the first sidelink slot being associated with the sidelink feedback resources.

16 . The UE of claim 11 , wherein the transmission starting location is in the symbol of the second sidelink slot, and wherein a timing associated with hybrid automatic repeat request feedback for the sidelink communication is based at least in part on the first symbol of the first sidelink slot.

17 . The UE of claim 11 , wherein the one or more processors, to transmit the sidelink communication, are configured to:

refrain, for the first sidelink slot, from using mini-slot scheduling based on the first sidelink slot being associated with the sidelink feedback resources.

18 . The UE of claim 11 , wherein mini-slot access is disabled for the first sidelink slot based on the first sidelink slot being associated with the sidelink feedback resources, and wherein the transmission starting location is the symbol of the second sidelink slot based on mini-slot access being disabled for the first sidelink slot.

19 . The UE of claim 11 , wherein an available transmission starting location for the first sidelink slot is only the first symbol of the first sidelink slot based on the first sidelink slot being associated with the sidelink feedback resources.

20 . The UE of claim 11 , wherein the sidelink feedback resources are associated with a physical sidelink feedback channel (PSFCH).

21 . A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:

receive an indication of a sidelink slot format,

wherein the sidelink slot format indicates a configuration of sidelink feedback resources, and

wherein the sidelink slot format is associated with a plurality of starting locations that include a first symbol of a first sidelink slot and a second symbol of the first sidelink slot;

measure a signal associated with a channel access procedure,

wherein the measurement of the signal indicates that the UE is permitted to access a sidelink channel,

wherein the measurement of the signal occurs after the first symbol of the first sidelink slot and prior to the second symbol of the first sidelink slot, and

wherein the sidelink slot format indicates that the first sidelink slot is associated with the sidelink feedback resources; and

transmit, using the second symbol of the first sidelink slot or a symbol of a second sidelink slot as a transmission starting location, a sidelink communication based at least in part on the measurement of the signal,

wherein a format of the sidelink feedback resources is based at least in part on the transmission starting location.

22 . The non-transitory computer-readable medium of claim 21 , wherein the one or more instructions, that cause the UE to transmit the sidelink communication, cause the UE to:

transmit data associated with the sidelink communication using one or more symbols associated with the sidelink feedback resources as indicated by the sidelink slot format.

23 . The non-transitory computer-readable medium of claim 21 , wherein the transmission starting location is in the symbol of the second sidelink slot based at least in part on the first sidelink slot being associated with the sidelink feedback resources.

24 . The non-transitory computer-readable medium of claim 21 , wherein the one or more instructions further cause the UE to:

refrain from using the second symbol of the first sidelink slot as the transmission starting location based at least in part on the first sidelink slot being associated with the sidelink feedback resources.

25 . The non-transitory computer-readable medium of claim 21 , wherein the sidelink feedback resources are associated with a physical sidelink feedback channel (PSFCH).

26 . An apparatus for wireless communication, comprising:

means for receiving an indication of a sidelink slot format,

wherein the sidelink slot format indicates a configuration of sidelink feedback resources, and

wherein the sidelink slot format is associated with a plurality of starting locations that include a first symbol of a first sidelink slot and a second symbol of the first sidelink slot;

means for measuring a signal associated with a channel access procedure,

wherein the measurement of the signal indicates that the apparatus is permitted to access a sidelink channel,

wherein the measurement of the signal occurs after the first symbol of the first sidelink slot and prior to the second symbol of the first sidelink slot, and

wherein the sidelink slot format indicates that the first sidelink slot is associated with the sidelink feedback resources; and

means for transmitting, using the second symbol of the first sidelink slot or a symbol of a second sidelink slot as a transmission starting location, a sidelink communication based at least in part on the measurement of the signal,

wherein a format of the sidelink feedback resources is based at least in part on the transmission starting location.

27 . The apparatus of claim 26 , wherein the transmission starting location is in the symbol of the second sidelink slot based at least in part on the first sidelink slot being associated with the sidelink feedback resources.

28 . The apparatus of claim 26 , further comprising:

means for refraining from using the second symbol of the first sidelink slot as the transmission starting location based at least in part on the first sidelink slot being associated with the sidelink feedback resources.

29 . The apparatus of claim 26 , wherein the transmission starting location is in the symbol of the second sidelink slot, and wherein a timing associated with hybrid automatic repeat request feedback for the sidelink communication is based at least in part on the first symbol of the first sidelink slot.

30 . The apparatus of claim 26 , wherein the sidelink feedback resources are associated with a physical sidelink feedback channel (PSFCH).