C-V2X Resource Selection Using Service Priority Groups
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Solution Overview
Problem
In C-V2X communication, the random selection of resources in exceptional resource pools leads to resource conflicts and reduces the reliability of high-priority service transmission due to unavailability of normal resource pools.
Innovation Solution
A method where a UE determines the service priority group for V2X services and decides whether to use resources in exceptional resource pools based on this group, improving resource utilization and reducing conflicts by considering priority levels and channel busy ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If resources are randomly selected in exceptional resource pools, then resource availability is improved, but resource conflicts among UEs increase and reliability of high priority service transmission deteriorates
Solution Approach 1:
The patent applies local quality by differentiating resource selection strategies based on service priority groups. High priority services use one selection approach while low priority services use another, making the resource pool have different properties for different service types. This resolves the contradiction by ensuring high priority services get reliable resources while still providing resource availability for other services.
Solution Approach 2:
The patent changes the parameter of resource selection from completely random to priority-based probabilistic selection. By introducing service priority as a parameter that influences resource selection probability, the system maintains resource availability while improving reliability for high priority services through weighted random selection rather than uniform random selection.
2Adaptability or versatility
If normal resource pools are unavailable, then exceptional resource pools must be used, but resource conflicts among UEs cannot be avoided
Solution Approach 1:
The patent applies preliminary action by pre-classifying services into priority groups before resource selection occurs. This preliminary classification allows the system to prepare different resource selection strategies in advance, so when normal resource pools are unavailable, UEs can immediately apply the appropriate strategy for their service priority level, reducing conflicts without sacrificing adaptability.
Solution Approach 2:
The patent introduces dynamics by making resource selection probabilistic rather than static. The selection probability dynamically adjusts based on service priority group and channel busy ratio, allowing the system to adapt resource allocation in real-time based on current conditions while maintaining adaptability to resource unavailability.
3Ease of operation
If resources are randomly selected in exceptional resource pools, then resource selection simplicity is maintained, but resource utilization efficiency deteriorates due to conflicts
Solution Approach 1:
The patent changes the parameter of resource selection from uniform random to priority-weighted probabilistic selection. This parameter change maintains the simplicity of random selection while improving efficiency by weighting probabilities based on service priority and channel conditions, allowing high priority services to secure resources more reliably without complex deterministic allocation.
Solution Approach 2:
The patent introduces feedback by using channel busy ratio as a dynamic parameter in resource selection probability. The system continuously monitors channel conditions and adjusts selection probabilities accordingly, providing feedback-based optimization that improves resource utilization efficiency while maintaining the simplicity of probabilistic selection mechanisms.
Data Source
AI summary
A method for cellular vehicle-to-everything and a device thereof are provided. The method includes: determining, by a processor, a service priority group corresponding to a vehicle-to-everything (V2X) service; and determining, by the processor, whether to use resources in exceptional resource pools for the V2X service based on the service priority group.