Granted Patent B2

US 12,557,105 · App. 18/605,913 · Granted Feb 17, 2026

Inventors: Bing Hui (Nanjing, CN); Esmael Hejazi Dinan (McLean, VA); Hua Zhou (Vienna, VA); Hyukjin Chae (San Diego, CA); Yunjung Yi (Vienna, VA)

Assignee: Ofinno, LLC

H04W72/20H04L5/0055H04L1/1812H04W72/121

Abstract

Claims (61)

1 . A method comprising:

receiving, by a wireless device, sidelink control information (SCI) indicating a physical sidelink feedback channel (PSFCH) transmission with hybrid automatic repeat request (HARQ) acknowledgement (ACK) information in response to a physical sidelink shared channel (PSSCH) reception;

determining an index of a PSFCH resource from physical resource blocks (PRBs) for the PSFCH transmission using:

a first mapping rule for:

groupcast PSSCH receptions with negative acknowledgement (NACK) only HARQ feedback; and

unicast PSSCH receptions; and

a second mapping rule for groupcast PSSCH receptions with ACK-and-NACK HARQ feedback; and

transmitting, via the PSFCH resource, the PSFCH transmission.

2 . The method of claim 1 , wherein the index is further determined using a user equipment identifier (UE ID) of the wireless device.

3 . The method of claim 1 , wherein:

the first mapping rule maps indexes of PSFCH resources to a first set of PRBs for PSFCH transmissions in response to both:

unicast receptions; and

groupcast PSSCH receptions with NACK only HARQ feedback; and

the second mapping rule maps indexes of PSFCH resources to a second set of the PRBs for PSFCH transmissions in response to groupcast PSSCH receptions with ACK-and-NACK HARQ feedback.

4 . The method of claim 1 , wherein the PSFCH resource is one of a pool of PSFCH resources comprising a plurality of PSFCH resources associated with the first mapping rule and the second mapping rule.

5 . The method of claim 4 , wherein the plurality of PSFCH resources of the pool of PSFCH resources are grouped into:

a first group for the first mapping rule; and

a second group for the second mapping rule.

6 . The method of claim 1 , wherein a first index of a first PSFCH resource determined using the first mapping rule overlaps with a second index of a second PSFCH resource determined using the second mapping rule.

7 . The method of claim 1 , wherein determining the index of the PSFCH resource from PRBs is based on a mapping between the index of the PSFCH resource and a subchannel index of the PSSCH reception.

8 . A wireless device comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the wireless device to:

receive sidelink control information (SCI) indicating a physical sidelink feedback channel (PSFCH) transmission with hybrid automatic repeat request (HARQ) acknowledgement (ACK) information in response to a physical sidelink shared channel (PSSCH) reception;

determine an index of a PSFCH resource from physical resource blocks (PRBs) for the PSFCH transmission using:

a first mapping rule for:

groupcast PSSCH receptions with negative acknowledgement (NACK) only HARQ feedback; and

unicast PSSCH receptions; and

a second mapping rule for groupcast PSSCH receptions with ACK-and-NACK HARQ feedback; and

transmit, via the PSFCH resource, the PSFCH transmission.

9 . The wireless device of claim 8 , wherein the index is further determined using a user equipment identifier (UE ID) of the wireless device.

10 . The wireless device of claim 8 , wherein:

the first mapping rule maps indexes of PSFCH resources to a first set of PRBs for PSFCH transmissions in response to both:

unicast receptions; and

groupcast PSSCH receptions with NACK only HARQ feedback; and

the second mapping rule maps indexes of PSFCH resources to a second set of the PRBs for PSFCH transmissions in response to groupcast PSSCH receptions with ACK-and-NACK HARQ feedback.

11 . The wireless device of claim 8 , wherein the PSFCH resource is one of a pool of PSFCH resources comprising a plurality of PSFCH resources associated with the first mapping rule and the second mapping rule.

12 . The wireless device of claim 11 , wherein the plurality of PSFCH resources of the pool of PSFCH resources are grouped into:

a first group for the first mapping rule; and

a second group for the second mapping rule.

13 . The wireless device of claim 8 , wherein a first index of a first PSFCH resource determined using the first mapping rule overlaps with a second index of a second PSFCH resource determined using the second mapping rule.

14 . The wireless device of claim 8 , wherein determining the index of the PSFCH resource from PRBs is based on a mapping between the index of the PSFCH resource and a subchannel index of the PSSCH reception.

15 . A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a wireless device, cause the wireless device to:

receive sidelink control information (SCI) indicating a physical sidelink feedback channel (PSFCH) transmission with hybrid automatic repeat request (HARQ) acknowledgement (ACK) information in response to a physical sidelink shared channel (PSSCH) reception;

determine an index of a PSFCH resource from physical resource blocks (PRBs) for the PSFCH transmission using:

a first mapping rule for:

groupcast PSSCH receptions with negative acknowledgement (NACK) only HARQ feedback; and

unicast PSSCH receptions; and

a second mapping rule for groupcast PSSCH receptions with ACK-and-NACK HARQ feedback; and

transmit, via the PSFCH resource, the PSFCH transmission.

16 . The non-transitory computer-readable medium of claim 15 , wherein the index is further determined using a user equipment identifier (UE ID) of the wireless device.

17 . The non-transitory computer-readable medium of claim 15 , wherein:

the first mapping rule maps indexes of PSFCH resources to a first set of PRBs for PSFCH transmissions in response to both:

unicast receptions; and

groupcast PSSCH receptions with NACK only HARQ feedback; and

the second mapping rule maps indexes of PSFCH resources to a second set of the PRBs for PSFCH transmissions in response to groupcast PSSCH receptions with ACK-and-NACK HARQ feedback.

18 . The non-transitory computer-readable medium of claim 15 , wherein the PSFCH resource is one of a pool of PSFCH resources comprising a plurality of PSFCH resources associated with the first mapping rule and the second mapping rule.

19 . The non-transitory computer-readable medium of claim 18 , wherein the plurality of PSFCH resources of the pool of PSFCH resources are grouped into:

a first group for the first mapping rule; and

a second group for the second mapping rule.

20 . The non-transitory computer-readable medium of claim 15 , wherein determining the index of the PSFCH resource from PRBs is based on a mapping between the index of the PSFCH resource and a subchannel index of the PSSCH reception.

Assignments (1)

Continuity (5)

References Cited (102)