Priority-Aware Resource Selection for Reliable V2X Traffic
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Solution Overview
Problem
Existing LTE-V2X and NR-V2X technologies fail to ensure reliable resource selection and preemption for high-priority-level traffic transmissions due to fast-changing radio channels and lack of collision avoidance mechanisms, leading to unreliable resource occupation and collisions between UEs with different priority levels.
Innovation Solution
A resource selection method that determines available resources based on the priority level and signal receiving power of traffic transmissions, allowing high-priority-level UEs to preempt resources and low-priority-level UEs to avoid collisions by adjusting RSRP thresholds and selecting target resources accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If sensing threshold is raised for high priority level traffic to ensure more idle resources, then resource availability improves, but resource collision cannot be avoided and transmission reliability deteriorates
Solution Approach 1:
The patent introduces priority level as a new parameter to differentiate resource selection behavior. High priority UEs use one set of sensing thresholds while low priority UEs use another set, allowing the system to maintain both resource availability and transmission reliability through parameter differentiation rather than uniform threshold adjustment
Solution Approach 2:
The patent segments the UE population into different priority levels (high priority and low priority) with distinct resource selection mechanisms. This segmentation allows high priority UEs to access resources more aggressively while low priority UEs perform more conservative sensing, resolving the contradiction between resource availability and collision avoidance
2Device complexity
If uniform sensing threshold is used for all priority levels, then system complexity is reduced, but high priority traffic transmission reliability deteriorates due to resource collisions
Solution Approach 1:
The patent applies local quality by assigning different sensing threshold characteristics to different priority levels. Instead of a uniform threshold for all UEs, each priority level has optimized threshold parameters tailored to its requirements, with high priority UEs using lower thresholds for faster access and low priority UEs using higher thresholds for better collision avoidance
3Reliability
If low priority level UE raises sensing threshold to avoid congestion, then resource collision avoidance improves, but active avoidance of high priority UE resources deteriorates due to lack of judgment mechanism
Solution Approach 1:
The patent implements feedback through the priority level judgment mechanism. Low priority UEs continuously monitor the priority levels of other UEs using resources and adjust their behavior accordingly - actively avoiding resources occupied by high priority UEs while maintaining normal operation for low priority resources, creating a dynamic avoidance system based on feedback from the environment
Data Source
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AI summary
A resource selection method and a terminal are provided which relate to a technical field of communication applications. The method is applied to a first terminal and includes obtaining basic information transmitted by a second terminal, the basic information including a priority level, in control information, of traffic transmission of the second terminal, and a signal receiving power, in traffic data information, of the traffic transmission of the second terminal; determining available resources, in candidate resources, available for traffic transmission according to the priority level of the traffic transmission of the second terminal and the signal receiving power of the traffic transmission of the second terminal; selecting one or more target resources required by the traffic transmission from the available resources, according to a priority level of traffic transmission of the first terminal.