Direction-Based V2X Resource Allocation for Platoon Interference
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Solution Overview
Problem
Conventional V2X networks face interference issues between platoons of vehicles traveling in opposite directions, leading to potential collisions and reduced reliability of intra-platoon communications, which can compromise safety and stability.
Innovation Solution
Assigning non-overlapping time-frequency radio resources to vehicles traveling in opposite directions on a highway, or using pseudo-random sequences to randomly select resources from a pool, ensuring minimal overlap and interference between platoons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing-based resource selection is used by all vehicles, then interference resolution is improved, but resource collision between platoons traveling in opposite directions occurs
Solution Approach 1:
The patent segments the shared time-frequency radio resource pool into direction-specific resource sets. Vehicles traveling in opposite directions are assigned to different resource sets based on their travel direction, preventing resource collision while maintaining the sensing-based interference resolution mechanism within each direction group.
Solution Approach 2:
Instead of having all vehicles sense and select from the same resource pool (conventional approach), the patent inverts the approach by first dividing vehicles into direction-based groups, then having each group sense and select from their designated resource set. This reversal of the selection hierarchy eliminates cross-direction interference.
2Productivity
If the same time-frequency radio resources are shared by platoons in opposite directions, then resource utilization is improved, but inter-platoon interference increases
Solution Approach 1:
The patent segments the resource pool into direction-specific subsets and assigns them to vehicles based on travel direction. This segmentation prevents inter-platoon interference while maintaining high resource utilization by ensuring that each direction's platoon uses the full available resource set for its direction without conflicting with opposite-direction platoons.
Solution Approach 2:
The patent applies local quality by creating direction-specific resource environments. Each vehicle experiences a localized resource pool tailored to its travel direction, with sensing and selection optimized for that specific direction's traffic patterns and interference characteristics, rather than a uniform global resource pool.
3Reliability
If sensing time is extended to detect incoming interfering UEs, then collision avoidance is improved, but response time for platoon communication decreases
Solution Approach 1:
The patent performs preliminary action by pre-dividing vehicles into direction-based groups and pre-assigning them to specific resource sets before communication occurs. This preliminary segmentation eliminates the need for extended sensing time to detect incoming interferers, as the direction-based resource allocation proactively prevents collisions before they can occur.
Solution Approach 2:
The patent applies preliminary anti-action by preemptively assigning opposite-direction platoons to different resource sets based on their travel direction. This preliminary differentiation creates an anti-interference structure that prevents harmful interactions before they can happen, eliminating the need for reactive sensing extensions.
Data Source
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AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE), e.g., a vehicle in a group of platooning vehicles configured for wireless communications, may identify a travel direction of the group of platooning vehicles. The UE may identify a set of time-frequency radio resources allocated to the travel direction. The UE may perform inter-vehicle communications with one or more neighboring vehicles of the group of platooning vehicles using the set of time-frequency radio resources.