CN-116235616-B - SL reliability enhancement through half-duplex and collision detection

Abstract

In one aspect, a method of wireless communication includes receiving, by a first User Equipment (UE), a first transmission for a New Radio (NR) side uplink channel from a second UE. The method also includes receiving, by the first UE, a second transmission for the side-link channel from a third UE. The method also includes transmitting, by the first UE, a feedback transmission based on a medium contention event for the first transmission and the second transmission of the NR side uplink channel and based on a range condition. In further aspects, the feedback transmission is sent based on a quality condition or both a range condition and a quality condition. Other aspects and features are also claimed and described.

Inventors

• S. Duta
• T.V.Ruan
• K. Gurati
• G. SACHS

Assignees

• 高通股份有限公司

Dates

Publication Date

20260505

Application Date

20210930

Priority Date

20210929

Claims (20)

1. 1. A method of wireless communication, comprising: receiving, by a first user equipment, UE, from a second UE, a first transmission for a new radio, NR, side uplink channel; Receiving, by the first UE, a second transmission for the NR-side uplink channel from a third UE, and A feedback transmission is sent by the first UE based on determining a medium contention event for the first transmission and the second transmission of the NR-side uplink channel, the medium contention event being determined based on a range condition and based on a comparison of a reference signal received power, RSRP, difference condition between the first transmission and the second transmission and an RSRP difference between the first transmission and the second transmission.
2. 2. The method of claim 1, further comprising: In response to determining to detect a medium contention event for the second UE, the third UE, or both, determining the medium contention event for the first transmission and the second transmission, and In response to determining the medium race event for the first transmission and the second transmission, determining whether to send feedback for the determined medium race event based on a second range condition or a quality condition.
3. 3. The method of claim 1, wherein the medium contention event comprises a half duplex event or a collision event, and wherein the RSRP difference condition corresponds to an RSRP difference threshold between two received transmissions.
4. 4. The method of claim 1, wherein the feedback transmission comprises or corresponds to a negative acknowledgement, NACK, configured to trigger retransmission of the first transmission or the second transmission, and wherein the feedback transmission is sent to the second UE or the third UE, and the method further comprises: Transmitting, by the first UE, a second feedback transmission according to the determination of the medium contention event based on the range condition, wherein the second feedback transmission includes or corresponds to a second NACK configured to trigger a second retransmission of the other of the first transmission or the second transmission, and wherein the feedback transmission is transmitted to the other of the second UE or the third UE.
5. 5. The method of claim 1, wherein the medium contention event comprises a half-duplex operation event, and wherein the half-duplex operation event corresponds to two or more UEs transmitting simultaneously.
6. 6. The method of claim 1, wherein the medium contention event comprises a collision event, and wherein the collision event corresponds to two or more UEs transmitting simultaneously with at least partial overlap of transmission resources.
7. 7. The method of claim 6, wherein the at least partial overlap of the transmission resources corresponds to a subchannel overlap for control transmission that allocates interference to resource blocks, and wherein the subchannel overlap corresponds to a subchannel overlap for side-uplink control information, SCI, transmission.
8. 8. The method of claim 1, wherein the first transmission and the second transmission comprise or correspond to a side-uplink control information, SCI, transmission, and the method further comprises: Decoding, by the first UE, the SCI transmission to determine transmission resources for the first transmission and the second transmission, wherein determining the medium contention event is further based on the determined transmission resources; monitoring, by the first UE, a first data transmission and a second data transmission based on the determined transmission resources of the SCI transmission, and Attempting, by the first UE, to decode the first data transmission and the second data transmission prior to determining the medium contention event.
9. 9. The method of claim 1, further comprising: Determining whether to detect a medium contention event for the first transmission and the second transmission based on a resource overlap between the first transmission and the second transmission, wherein the medium contention event is determined based on the range condition and the RSRP difference condition.
10. 10. The method of claim 1, further comprising: Determining the RSRP difference between the first transmission and the second transmission based on a first RSRP value of the first transmission and a second RSRP value of the second transmission, and The RSRP difference between the first transmission and the second transmission is compared to the RSRP difference condition, wherein the medium contention event is determined based in part on the RSRP difference satisfying the RSRP difference condition.
11. 11. An apparatus configured for wireless communication, comprising: at least one processor, and A memory coupled to the at least one processor, Wherein the at least one processor is configured to: receiving a first transmission for a new radio NR side uplink channel from a first user equipment UE; receiving a second transmission for the NR-side downlink channel from a second UE, and A feedback transmission is sent by the first UE based on determining a medium contention event for the first transmission and the second transmission of the NR-side uplink channel, the medium contention event being determined based on a range condition and based on a comparison of a reference signal received power, RSRP, difference condition between the first transmission and the second transmission and an RSRP difference between the first transmission and the second transmission.
12. 12. The apparatus of claim 11, in which the at least one processor is further configured: Determining parameters of the network; Comparing the parameter with the adjustment condition, and The range condition is adjusted based on the parameter satisfying the adjustment condition, wherein the range condition includes or corresponds to a range condition between a transmitting UE and a receiving UE or corresponds to a range condition between two transmitting UEs.
13. 13. The apparatus of claim 11, in which the at least one processor is further configured: Receiving a radio resource control, RRC, message from a network entity, and The range condition, the RSRP difference condition, or both are adjusted based on the RRC message.
14. 14. The apparatus of claim 11, in which the at least one processor is further configured: in response to determining the medium race event, determining whether to send feedback for the determined medium race event based on a second range condition, wherein the range condition includes or corresponds to a range condition between a sending UE and a receiving UE, and wherein the second range condition includes or corresponds to a range condition between two sending UEs.
15. 15. The apparatus of claim 11, in which the at least one processor is further configured: the medium contention event is further determined based on a quality condition, wherein the quality condition includes or corresponds to a signal to interference plus noise ratio, SINR, condition or an RSRP range condition.
16. 16. The apparatus of claim 11, in which the at least one processor is further configured: Determining a medium contention event detection mode prior to receiving the first transmission, wherein the medium contention event detection mode includes half duplex detection, collision detection, or both, and The medium contention event for the first transmission and the second transmission of the NR side uplink channel is determined based on the range condition, wherein the medium contention event is determined based on the range condition.
17. 17. The apparatus of claim 11, wherein the first transmission comprises a region identifier region ID for the first UE, and wherein the at least one processor is further configured to: Determining a distance between the device and the first UE based on the region ID, a timing advance value, or a combination thereof, and The media race event is determined by comparing the distance to the range condition.
18. 18. A method of wireless communication, comprising: receiving, by a first user equipment, UE, from a second UE, a first transmission for a new radio, NR, side uplink channel; receiving, by the first UE, a second transmission for the NR side uplink channel from a third UE; determining whether to detect a medium contention event for the first transmission and the second transmission based on an overlap between the first transmission and the second transmission, and A feedback transmission is sent by the first UE based on determining a medium contention event for the first transmission and the second transmission of the NR-side uplink channel, the medium contention event being determined based on a range condition and based on a comparison of a quality difference condition between the first transmission and the second transmission and a quality difference between the first transmission and the second transmission.
19. 19. The method of claim 18, wherein the quality difference condition comprises or corresponds to a reference signal received power, RSRP, similar condition, or a signal to interference plus noise ratio, SINR, similar condition, and further comprising: The medium contention event for the first transmission and the second transmission of the NR-side uplink channel is determined by the first UE based on the quality difference condition.
20. 20. The method of claim 18, wherein determining the media contention event based on the quality difference condition comprises: Determining the medium contention event for the first transmission and the second transmission, and Determining whether to send feedback for the media contention event based on the quality difference condition.

Description

SL reliability enhancement through half-duplex and collision detection Cross Reference to Related Applications The present application claims the benefit of U.S. patent application Ser. No.17/449,425 (208297), entitled "SL RELIABILITY ENHANCEMENT BY HALF DUPLEX AND COLLISION DETECTION", filed 29 on 9 in 2021, and U.S. provisional patent application Ser. No.63/086,006 (208297P 1), entitled "SL RELIABILITY ENHANCEMENT BY HALF DUPLEX AND COLLISION DETECTION", filed 30 in 9 in 2020, the disclosures of which are hereby incorporated by reference in their entirety as if fully set forth below and for all applicable purposes. Technical Field Aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to media contention event detection and mitigation. Certain embodiments of the techniques discussed below may implement and provide media contention event detection and mitigation for side-link channels in 5G NR. Background Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and so on. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing the available network resources. Such networks, which are typically multiple access networks, support communication for multiple users by sharing the available network resources. The wireless communication network may include a plurality of base stations or node bs that may support communication for a plurality of User Equipments (UEs). The UE may communicate with the base station via the downlink and uplink. The downlink (or forward link) refers to the communication link from the base stations to the UEs, and the uplink (or reverse link) refers to the communication link from the UEs to the base stations. The base station may transmit data and control information to the UE on the downlink and/or may receive data and control information from the UE on the uplink. On the downlink, transmissions from a base station may experience interference due to transmissions from neighbor base stations or transmissions from other wireless Radio Frequency (RF) transmitters. On the uplink, transmissions from a UE may experience interference from uplink transmissions from other UEs communicating with a neighbor base station or from other wireless RF transmitters. This interference may degrade performance on both the downlink and uplink. As the demand for mobile broadband access continues to grow, the likelihood of interference and congestion networks increases as more UEs access long-range wireless communication networks and more short-range wireless systems are deployed in communities. Research and development continue to advance wireless technology not only to meet the ever-increasing demand for mobile broadband access, but also to improve and enhance the user experience with mobile communications. Disclosure of Invention The following presents some aspects of the present disclosure in order to provide a basic understanding of the techniques discussed. This summary is not an extensive overview of all contemplated features of the disclosure, and is intended to neither identify key or critical elements of all aspects of the disclosure nor delineate the scope of any or all aspects of the disclosure. Its sole purpose is to present some concepts of one or more aspects of the disclosure in a summarized form as a prelude to the more detailed description that is presented later. In one aspect, a method of wireless communication includes receiving, by a first User Equipment (UE), a first transmission for a New Radio (NR) side uplink channel from a second UE. The method also includes receiving, by the first UE, a second transmission for the side-uplink channel from a third UE. The method also includes transmitting, by the first UE, a feedback transmission based on a medium contention event for the first transmission and the second transmission of the NR-side uplink channel and based on a range condition. In a further aspect of the disclosure, an apparatus configured for wireless communication is disclosed. The apparatus includes at least one processor and a memory coupled to the processor. The processor is configured to receive a first transmission for a New Radio (NR) side uplink channel from a second UE, receive a second transmission for the side uplink channel from a third UE, and send a feedback transmission based on a medium contention event for the first and second transmissions of the NR side uplink channel and based on a range condition. In another aspect, a method of wireless communication includes receiving, by a first User Equipment (UE), a first transmission for a New Radio (NR) side uplink channel from a second UE. The method also includes receiving, by the first UE, a second transmission for the NR side uplink channel from a third UE. The method further includes transmitting, by the first UE, a feedback