Resource Set Transmission for NR-V2X Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing resource selection modes in NR-V2X systems face issues such as hidden node, exposed node, and half-duplex problems, which affect the reliability and efficiency of resource selection.
Innovation Solution
A method where a first terminal indicates M resource sets to a target terminal, allowing the target terminal to select a candidate transmission resource from the indicated resource set, thereby avoiding hidden node, exposed node, and half-duplex issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a terminal device randomly selects a transmission resource in a resource pool, then resource selection simplicity is improved, but resource selection reliability deteriorates due to hidden node, exposed node, and half-duplex problems
Solution Approach 1:
The patent introduces a first terminal as an intermediary that assists the second terminal in resource selection. The first terminal indicates a resource set to the second terminal, which then selects resources from this indicated set. This intermediary mechanism resolves the contradiction by maintaining simplicity for the second terminal while improving reliability through the first terminal's assistance in avoiding hidden node, exposed node, and half-duplex problems.
2Reliability
If a terminal device selects a transmission resource according to a sensing result, then resource selection reliability is improved to some extent, but device complexity increases and hidden node problems persist
Solution Approach 1:
The first terminal performs sensing and resource evaluation tasks on behalf of the second terminal. Instead of the second terminal conducting complex sensing operations, the first terminal independently performs these functions and provides the results by indicating a suitable resource set. This self-service approach improves reliability while reducing the complexity burden on the second terminal.
3Object-affected harmful factors
If a terminal device performs sensing-based resource selection, then interference avoidance is improved, but hidden node problems deteriorate due to limited detection range
Solution Approach 1:
The first terminal creates a copy or representation of the resource availability information through its sensing results and communicates this to the second terminal. By using the first terminal's sensing copy rather than relying solely on the second terminal's limited direct sensing, the system achieves better interference avoidance while maintaining reliability, as the first terminal can detect signals that the second terminal cannot directly perceive.
Data Source
Figure 1~3
Figure 4~6
Figure 7~9
AI summary
Provided in the embodiments of the present application are a resource set transmission method and a terminal device, which can avoid problems of hidden nodes, exposed nodes, half duplex, etc. avoided during resource selection, and improve the reliability of resource selection. The resource set transmission method comprises: a first terminal sending first information, the first information being used for indicating M resource sets, wherein the M resource sets are targeted at one target terminal, or each resource set in the M resource sets is targeted at one or more target terminals, and the resource set is used for determining a candidate transmission resource when the target terminal performs resource selection, and M is a positive integer and M> 1.