RSU Resource Allocation for V2X Groups by Driving Direction
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Solution Overview
Problem
The performance of Vehicle-to-Everything (V2X) communication links is compromised by frequent interruptions and unstable channel quality due to vehicle mobility, affecting the timeliness and efficiency of resource utilization in intelligent transportation systems.
Innovation Solution
A resource allocation method and road side unit (RSU) system that groups vehicles by driving direction, allocates communication resources based on traffic density, and manages resource occupancy information to reduce conflicts and improve channel stability, allowing vehicles to maintain allocated resources in low-density areas and adjust resource allocation principles during high-density conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cellular resource scheduling is used for V2X communication, then resource allocation follows conventional cellular procedures, but communication links are frequently interrupted and channel quality becomes unstable due to vehicle mobility
Solution Approach 1:
The patent segments V2X communication resources by grouping vehicles according to their driving directions. Each RSU manages resource allocation for vehicles in its coverage area, creating localized resource pools that reduce interference and improve link stability. This segmentation approach transforms the complex global resource scheduling problem into multiple manageable local allocation tasks.
Solution Approach 2:
The patent implements preliminary resource allocation where RSUs pre-assign communication resources to V2X communication groups before actual communication occurs. This advance resource reservation ensures that vehicles have dedicated resources available, preventing interruptions and maintaining stable communication links even during rapid mobility transitions.
2Loss of time
If resource allocation frequency is increased to handle mobility, then resource utilization timeliness improves, but communication overhead and system complexity increase
Solution Approach 1:
The patent merges multiple vehicles with similar driving directions into unified V2X communication groups. Instead of individually managing resources for each vehicle, the RSU allocates resources to the entire group, significantly reducing signaling overhead and communication energy consumption while maintaining timely resource utilization for all group members.
Solution Approach 2:
The patent implements selective resource allocation where RSUs allocate resources proactively to vehicles that are likely to remain in coverage areas, rather than continuously reallocating for all vehicles. This partial action approach reduces communication overhead while ensuring timely resource availability for critical communication needs.
3Reliability
If vehicles switch frequently between different cells, then coverage is maintained, but V2X communication based on PC5 link is interrupted and channel quality deteriorates
Solution Approach 1:
The patent uses preliminary resource allocation where RSUs assign resources to V2X groups before vehicles leave coverage areas. This advance resource provisioning ensures communication continuity during cell transitions, as vehicles already have allocated resources that remain valid during handover, preventing interruptions and maintaining channel quality.
Solution Approach 2:
The patent introduces RSUs as intermediary nodes that manage resource allocation and coordinate between different cells. The RSU acts as a mediator that maintains resource allocation consistency during vehicle mobility, allowing frequent cell switching while preserving V2X communication continuity through centralized resource management.
Data Source
AI summary
A resource allocation method is provided, the method includes: receives a resource scheduling request by a first side unit (RSU) sent from a first vehicle to everything (V2X) communication group which comprises vehicles in a same driving direction; allocating communication resources for the first V2X communication group. A road side unit is also provided. By utilizing embodiments of the present disclosure, rationality of resource allocation can be improved, qualities of vehicle communication links and channels in the communication group is stable and a performance of vehicle networking can be fully realized.