Reference Resource Selection for Reliable V2X Sidelink Scheduling
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Solution Overview
Problem
The challenge in V2X systems is determining a reference resource set for terminals to assist in resource selection, particularly in the second transmission mode where terminals autonomously select resources, leading to issues like hidden nodes, half-duplex, exposed nodes, and high power consumption.
Innovation Solution
A method for a terminal to determine a reference resource set by excluding resources based on channel sensing and SL-RSRP thresholds, using network configuration or pre-configuration, and sending a reference resource set to assist another terminal in resource selection, thereby improving reliability and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminals autonomously select transmission resources in the second transmission mode, then resource allocation flexibility is improved, but resource selection reliability deteriorates due to hidden nodes, half-duplex, and exposed nodes problems
Solution Approach 1:
The patent introduces a reference resource set as an intermediary mechanism. One terminal determines and sends a reference resource set to another terminal, which then uses this reference set to guide its autonomous resource selection. This mediator (reference resource set) resolves the contradiction by providing reliable guidance while preserving autonomous selection flexibility.
Solution Approach 2:
The patent implements a feedback mechanism where terminals send reference resource sets to assist other terminals in resource selection. This feedback loop allows terminals to share channel sensing results and resource availability information, improving resource selection reliability while maintaining the flexibility of autonomous resource allocation in mode 2.
2Adaptability or versatility
If terminals perform channel sensing and resource selection autonomously, then resource allocation adaptability is improved, but power consumption increases
Solution Approach 1:
The patent applies partial action by having terminals send reference resource sets selectively rather than continuously. The reference resource set is determined and sent based on specific conditions (e.g., when channel conditions change or when assisting other terminals), reducing unnecessary power consumption while maintaining adequate resource selection adaptability.
3Reliability
If a reference resource set is sent to assist another terminal in resource selection, then resource selection reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the resource selection process into distinct phases: one terminal determines a reference resource set based on its channel sensing, sends this reference set to another terminal, and the receiving terminal uses it to guide its resource selection. This segmentation reduces device complexity by dividing the complex autonomous selection task into manageable steps with clear responsibilities.
Data Source
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AI summary
Provided in the embodiments of the present application are a method and apparatus for determining a reference resource, and a terminal. The method comprises: a first terminal determining a resource pool, in which a reference resource set is located, and determining a first resource set, which belongs to the resource pool, in a resource selection window; the first terminal performing resource exclusion in the first resource set on the basis of detected SCI and measured SL-RSRP, so as to obtain a second resource set and/or a third resource set, wherein the second resource set is a resource set that is suitable for use by a second terminal, and the third resource set is a resource set that is not suitable for use by the second terminal; and the first terminal indicating the second resource set and/or the third resource set to the second terminal.