US-12628191-B2 - Handling resource collisions based on sidelink feedback transmission opportunities

Abstract

Methods, systems, and devices for wireless communication are described. In some systems, a user equipment (UE) may receive a first sidelink message associated with a sidelink feedback transmission occasion and a second sidelink message also associated with the sidelink feedback transmission occasion. The UE may provide a type of feedback information via the sidelink feedback transmission occasion based on the first sidelink message and the second sidelink message both being associated with the sidelink feedback transmission occasion. The provided type of feedback information may be based on a quantity of one or more additional sidelink feedback transmission occasions subsequent to the sidelink feedback transmission occasion that are also available for transmission of either first feedback associated with the first sidelink message or second feedback associated with the second sidelink message.

Inventors

• Chih-Hao Liu
• Jing Sun
• Xiaoxia Zhang
• Giovanni Chisci

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260512

Application Date

20230714

Claims (20)

1. 1 . An user equipment (UE) for wireless communication, comprising: one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and individually or collectively operable to execute the processor-executable code to cause the UE to: receive a first sidelink message, the first sidelink message associated with a sidelink feedback transmission occasion; receive a second sidelink message, the second sidelink message also associated with the sidelink feedback transmission occasion; and provide a type of feedback information via the sidelink feedback transmission occasion based at least in part on the first sidelink message and the second sidelink message both being associated with the sidelink feedback transmission occasion, wherein the provided type of feedback information is based at least in part on a quantity of one or more additional sidelink feedback transmission occasions subsequent to the sidelink feedback transmission occasion that are also available for transmission of either first feedback associated with the first sidelink message or second feedback associated with the second sidelink message.
2. 2 . The UE of claim 1 , wherein, to provide the type of feedback information, the one or more processors are individually or collectively operable to execute the processor-executable code to cause the UE to: perform discontinuous transmission during the sidelink feedback transmission occasion, wherein the provided type of feedback information comprises a discontinuous transmission type based at least in part on the first feedback comprising a positive acknowledgment and the second feedback comprising a negative acknowledgment and further based at least in part on at least one of the one or more additional sidelink feedback transmission occasions being available for transmission of the second feedback comprising the negative acknowledgment.
3. 3 . The UE of claim 2 , wherein the one or more processors are individually or collectively further operable to execute the processor-executable code to cause the UE to: transmit the second feedback comprising the negative acknowledgment via the at least one additional sidelink feedback transmission occasion based at least in part on performing the discontinuous transmission during the sidelink feedback transmission occasion.
4. 4 . The UE of claim 2 , wherein the first feedback and the second feedback both comprise unicast or groupcast feedback of a first type or a second type, the first type associated with indication of positive acknowledgments via discontinuous transmission and the second type associated with indication of positive acknowledgments via transmission of positive acknowledgments.
5. 5 . The UE of claim 2 , wherein: the first feedback comprises unicast feedback or groupcast feedback of a second type, the second type associated with indication of positive acknowledgments via transmission of positive acknowledgments; and the second feedback comprises groupcast feedback of a first type, the first type associated with indication of positive acknowledgments via discontinuous transmission.
6. 6 . The UE of claim 2 , wherein: the first feedback comprises groupcast feedback of a first type, the first type associated with indication of positive acknowledgments via discontinuous transmission; and the second feedback comprises unicast feedback or groupcast feedback of a second type, the second type associated with indication of positive acknowledgments via transmission of positive acknowledgments.
7. 7 . The UE of claim 1 , wherein, to provide the type of feedback information, the one or more processors are individually or collectively operable to execute the processor-executable code to cause the UE to: transmit a negative acknowledgment via the sidelink feedback transmission occasion, wherein the provided type of feedback information comprises the negative acknowledgment based at least in part on at least one of the first feedback and the second feedback comprising the negative acknowledgment.
8. 8 . The UE of claim 7 , wherein the one or more processors are individually or collectively further operable to execute the processor-executable code to cause the UE to: receive a retransmission of the first sidelink message and the second sidelink message based at least in part on transmitting the negative acknowledgment.
9. 9 . The UE of claim 7 , wherein: the first feedback comprises groupcast feedback of a first type, the first type associated with indication of positive acknowledgments via discontinuous transmission; and the second feedback comprises unicast feedback or groupcast feedback of a second type, the second type associated with indication of positive acknowledgments via transmission of positive acknowledgments.
10. 10 . The UE of claim 7 , wherein: the second feedback comprises the negative acknowledgment, and the one or more processors are individually or collectively operable to execute the processor-executable code to cause the UE to transmit the negative acknowledgment further based at least in part on the quantity of one or more additional sidelink feedback transmission occasions that are subsequent to the sidelink feedback transmission occasion and that are available for transmission of the second feedback being zero.
11. 11 . The UE of claim 10 , wherein the first feedback and the second feedback both comprise unicast or groupcast feedback of a first type or a second type, the first type associated with indication of positive acknowledgments via discontinuous transmission and the second type associated with indication of positive acknowledgments via transmission of positive acknowledgments.
12. 12 . The UE of claim 1 , wherein, to provide the type of feedback information, the one or more processors are individually or collectively operable to execute the processor-executable code to cause the UE to: perform discontinuous transmission during the sidelink feedback transmission occasion, wherein the provided type of feedback information comprises a discontinuous transmission type based at least in part on both the first feedback and the second feedback comprising positive feedback of a feedback type that is associated with indication of positive acknowledgments via discontinuous transmission.
13. 13 . The UE of claim 1 , wherein, to provide the type of feedback information, the one or more processors are individually or collectively operable to execute the processor-executable code to cause the UE to: transmit a negative acknowledgment via the sidelink feedback transmission occasion, wherein the provided type of feedback information comprises the negative acknowledgment based at least in part on both the first feedback and the second feedback comprising the negative acknowledgment.
14. 14 . The UE of claim 13 , wherein: the first feedback comprises groupcast feedback of a first type, the first type associated with indication of positive acknowledgments via discontinuous transmission; and the second feedback comprises unicast feedback or groupcast feedback of a second type, the second type associated with indication of positive acknowledgments via transmission of positive acknowledgments.
15. 15 . The UE of claim 1 , wherein, to provide the type of feedback information, the one or more processors are individually or collectively operable to execute the processor-executable code to cause the UE to: transmit a positive acknowledgment via the sidelink feedback transmission occasion, wherein the provided type of feedback information comprises the positive acknowledgment based at least in part on both the first feedback and the second feedback comprising the positive acknowledgment.
16. 16 . The UE of claim 15 , wherein: the first feedback comprises groupcast feedback of a first type, the first type associated with indication of positive acknowledgments via discontinuous transmission; and the second feedback comprises unicast feedback or groupcast feedback of a second type, the second type associated with indication of positive acknowledgments via transmission of positive acknowledgments.
17. 17 . The UE of claim 1 , wherein the one or more processors are individually or collectively further operable to execute the processor-executable code to cause the UE to: determine the type of feedback information based at least in part on the first sidelink message and the second sidelink message being associated with a same hashing function within the sidelink feedback transmission occasion.
18. 18 . The UE of claim 1 , wherein the one or more processors are individually or collectively further operable to execute the processor-executable code to cause the UE to: determine the type of feedback information based at least in part on a first set of one or more sidelink feedback resources associated with the first sidelink message at least partially overlapping in time, frequency, or both, with a second set of one or more sidelink feedback resources associated with the second sidelink message within the sidelink feedback transmission occasion.
19. 19 . The UE of claim 1 , wherein the provided type of feedback information comprises one of a positive acknowledgment, a negative acknowledgment, or a discontinuous transmission type.
20. 20 . A method for wireless communication by a user equipment (UE), comprising: receiving a first sidelink message, the first sidelink message associated with a sidelink feedback transmission occasion; receiving a second sidelink message, the second sidelink message also associated with the sidelink feedback transmission occasion; and providing a type of feedback information via the sidelink feedback transmission occasion based at least in part on the first sidelink message and the second sidelink message both being associated with the sidelink feedback transmission occasion, wherein the provided type of feedback information is based at least in part on a quantity of one or more additional sidelink feedback transmission occasions subsequent to the sidelink feedback transmission occasion that are also available for transmission of either first feedback associated with the first sidelink message or second feedback associated with the second sidelink message.

Description

FIELD OF TECHNOLOGY The following relates to wireless communication, including handling resource collisions based on sidelink feedback transmission opportunities. BACKGROUND Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE). In some systems, a sidelink UE may receive a sidelink message from one or more other sidelink UEs. The sidelink UE may transmit feedback in response to each sidelink message to indicate whether the respective sidelink message was received and decoded properly. The UE may perform a listen-before-talk (LBT) procedure to gain access to a sidelink feedback channel before transmitting the feedback. SUMMARY The described techniques relate to improved methods, systems, devices, and apparatuses that support handling resource collisions based on sidelink feedback transmission opportunities. For example, the described techniques provide for a sidelink user equipment (UE) to identify when a potential collision between feedback for two or more sidelink messages may occur and determine a type of feedback information to provide via the colliding feedback transmission occasion (e.g., for the sidelink UE to determine what type of feedback to provide via a feedback occasion when the UE is scheduled or otherwise has the ability to transmit feedback responsive to more than one message, such as from different UEs, in the same feedback occasion-such as when the same feedback occasion is available to the UE for the transmission of multiple feedback messages corresponding to multiple messages received by the sidelink UE). For example, the UE may receive at least a first sidelink message and a second sidelink message associated with a same sidelink feedback transmission occasion. First feedback for the first sidelink message and second feedback for the second sidelink message may be associated with at least partially overlapping time and/or frequency resources within the sidelink feedback transmission occasion, or with a same hashing function within the sidelink feedback transmission occasion, or both, which may correspond to a potential collision between the first and second feedback if transmitted in the sidelink feedback transmission occasion. The UE as described herein may provide a type of feedback information in place of the first and second feedback via the sidelink feedback transmission occasion. The type of feedback information may be one of a positive acknowledgment (ACK), a negative acknowledgment (NACK), or a discontinuous transmission (DTX). In some cases, the UE may determine the type of feedback information to provide based on a type of the first feedback and a type of the second feedback (e.g., whether the first and/or second feedback include an ACK, a NACK, or both), based on a quantity of additional feedback transmission occasions after the feedback transmission occasion that are available for transmission of either the first feedback or the second feedback, or any combination thereof. By determining the type of feedback information to provide in accordance with the techniques described herein, the UE may improve coordination between sidelink devices, reduce a likelihood of collisions or interference between feedback transmissions, and minimize or reduce a quantity of retransmissions, which may reduce latency, among other examples. A method for wireless communication by a UE is described. The method may include receiving a first sidelink message, the first sidelink message associated with a sidelink feedback transmission occasion, receiving a second sidelink message, the second sidelink message also associated with the sidelink feedback transmission occasion, and providing a type of feedback information via the sidelink feedback transmission occasion based on the first sidelink message and the second sidelink message both being associated with the sidelink feedback transmission occasion, where the provided type of feedback information is based on a quantity of one or more additional sidelink feed