Sidelink Resource Exclusion with Receiver Sensing for UE Coordination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing Mode 2 resource allocation scheme in NR V2X lacks assistance information from the receiver UE to the transmitter UE, leading to inefficiencies in sidelink resource selection, which affects reliability and increases latency.
Innovation Solution
A method where a first UE determines a sensing result and transmits it to a second UE, considering various sensing types such as PSSCH half-duplex transmission, reservation information, and PSFCH transmission capabilities, to enhance resource selection for sidelink communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing Mode 2 resource allocation scheme is used, then the UE can autonomously select sidelink resources based on its own channel sensing mechanism, but the reliability of sidelink transmission is reduced and latency increases due to lack of assistance information from receiver UE
Solution Approach 1:
The receiver UE provides feedback information (assistance information) to the transmitter UE about the channel conditions and resource availability. This feedback mechanism enables the transmitter UE to make more informed resource selection decisions, improving transmission reliability while maintaining autonomous operation.
Solution Approach 2:
The receiver UE performs sensing and prepares assistance information in advance before the transmitter UE needs to select resources. This preliminary action provides the transmitter UE with pre-processes information about suitable resources, reducing latency and improving reliability of the resource selection process.
2Loss of time
If the transmitter UE autonomously selects resources without assistance information, then the device complexity is reduced, but the latency in resource selection increases
Solution Approach 1:
The receiver UE performs sensing and prepares assistance information in advance before the transmitter UE needs to select resources. This preliminary action provides the transmitter UE with pre-processes information about suitable resources, reducing resource selection latency.
Solution Approach 2:
The assistance information acts as an intermediary that bridges the gap between the receiver UE's channel knowledge and the transmitter UE's resource selection process. This intermediary provides processed sensing results that accelerate the transmitter UE's decision-making without requiring it to perform complex sensing itself.
3Productivity
If the receiver UE provides assistance information to the transmitter UE, then the sidelink transmission reliability is improved, but the device complexity and processing requirements increase
Solution Approach 1:
The receiver UE provides feedback information (assistance information) to the transmitter UE about the channel conditions and resource availability. This feedback mechanism enables the transmitter UE to make more informed resource selection decisions, improving transmission reliability while maintaining autonomous operation.
Solution Approach 2:
Each UE independently performs its own sensing and resource evaluation, and the transmitter UE ultimately makes the resource selection decision itself based on the assistance information. This self-service approach maintains autonomy while benefiting from the coordination information, avoiding excessive complexity in the coordination mechanism.
Data Source
AI summary
A method that determines a resource at a first user equipment (UE) for a sidelink communication from the second UE to a first UE is described. In an exemplary embodiment, the method receives a request from the second UE to send data to the first UE. In addition, the method determines a preconfigured resource selection window that is used by the second UE. Furthermore, the method determines a first sensing result at the first UE. The determined first sensing result includes information to be reported to the second UE for a resource selection. The determined first sensing results has a plurality of first sensing types. Further, the method transmits the first sensing result from the first UE to the second UE.