HARQ Feedback Priority in NR V2X Sidelink
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Solution Overview
Problem
In wireless communication systems, particularly in V2X scenarios, there is a need to efficiently manage sidelink (SL) communication resources and prioritize Hybrid Automatic Repeat Request (HARQ) feedback information for effective communication without SL transmission, ensuring reliable and timely data exchange among vehicles and infrastructure.
Innovation Solution
A method and device configuration that involve receiving information about PUCCH resources and SL resources from a base station, generating HARQ feedback information, and determining its priority based on the largest priority value associated with the SL resource, allowing efficient SL communication by prioritizing HARQ feedback reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ feedback information is reported to base station even when SL transmission is not performed, then communication reliability is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the priority value of HARQ feedback information based on whether SL transmission was performed. When SL transmission is not performed, the priority value is set to a lower level, which changes the parameter of feedback reporting behavior to reduce unnecessary resource consumption while maintaining reliability for actual transmission cases
2Productivity
If priority value of HARQ feedback is determined based on SL resource priority, then reporting efficiency is improved, but complexity of priority determination increases
Solution Approach 1:
The patent uses an intermediary approach by introducing a priority determination unit that acts as a mediator between the SL resource configuration and the HARQ feedback reporting process. This intermediary component simplifies the overall system by centralizing the priority determination logic based on pre-configured SL resource priorities, making the complexity manageable and systematic
Data Source
AI summary
Methods, and devices capable of performing such methods, involving a device that receives information related to a physical uplink control channel resource for reporting hybrid automatic repeat request (HARQ) feedback information, as well as information related to sidelink (SL) resources. Based on the device not performing a physical sidelink control channel (PSCCH) transmission, the device generates the HARQ feedback information in the form of an acknowledgement (ACK). Further, a maximum priority value is associated with the ACK, among possible priority values, related to the SL resources, such that, a PUCCH is transmitted with the ACK based on the priority value.