Sidelink HARQ Feedback Resource Determination via SCI Indication
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Solution Overview
Problem
There is no effective solution for determining a resource for hybrid automatic repeat request (HARQ) feedback in sidelink communication, which can lead to conflicts and inefficiencies in vehicle-to-everything (V2X) applications.
Innovation Solution
A method is provided where a first terminal sends sidelink control information (SCI) to a second terminal indicating a resource or resource window for HARQ feedback, allowing the second terminal to select and send HARQ feedback information, thereby avoiding conflicts by monitoring energy values and selecting resources with low energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal autonomously determines resources for sidelink communication, then resource allocation flexibility is improved, but resource conflicts between multiple terminals occur
Solution Approach 1:
The patent applies preliminary action by having the first terminal monitor SCI from other terminals before determining its own feedback resource, and by having the second terminal monitor energy values before selecting a feedback resource. This advance monitoring and selection process prevents resource conflicts before they occur, resolving the contradiction between autonomous resource determination flexibility and resource conflict avoidance.
2Productivity
If HARQ feedback resources are not properly determined, then communication overhead is reduced, but communication reliability deteriorates
Solution Approach 1:
The patent applies self-service by enabling terminals to autonomously determine and manage their own HARQ feedback resources through monitoring SCI and selecting resources based on energy value thresholds. This self-determined resource allocation maintains communication reliability while avoiding the overhead of network-controlled resource assignment, resolving the contradiction between communication overhead and communication reliability.
Data Source
AI summary
A method for determining a feedback resource in a sidelink includes a first terminal sending SCI to a second terminal, where the SCI includes indication information. The indication information is used to indicate a first resource or a first resource window to be occupied for sending hybrid automatic repeat request HARQ feedback information by the second terminal, and the first resource window includes a plurality of candidate first resources. The method further includes the first terminal receiving, on the first resource, the HARQ feedback information sent by the second terminal, or monitors, in the first resource window, the HARQ feedback information sent by the second terminal.