V2I Positioning via RSU Coverage and Power
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Solution Overview
Problem
Conventional GPS systems for vehicle positioning are unreliable in indoor environments and urban areas with many buildings, as they require signals from multiple satellites and are affected by weather and structural interference, leading to attenuated position recognition performance.
Innovation Solution
A method and apparatus for V2I communication that acquire position information using V2I messages from road side units (RSUs), including transmission power and coverage information, to determine region information, which can indicate the vehicle's location within or outside the RSU's coverage, and utilize neighboring RSU information for more precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS system is used for vehicle positioning, then position information can be obtained in open environments, but position recognition performance is attenuated in indoor environments and urban areas with many buildings
Solution Approach 1:
The patent introduces RSU (Road Side Unit) as an intermediary infrastructure component that mediates between GPS satellite signals and the vehicle's positioning system. The RSU receives GPS signals and retransmits positioning information to vehicles via V2I communication, enabling vehicles to obtain position information in environments where direct GPS reception is blocked by buildings or terrain.
Solution Approach 2:
The patent makes the RSU a multi-functional component that not only assists GPS positioning but also provides V2V (Vehicle-to-Vehicle) communication relay, traffic information dissemination, and other smart transportation services. This universal infrastructure serves multiple purposes, making the system more robust and versatile.
2Adaptability or versatility
If V2I communication with RSU is used for positioning, then position information can be obtained in indoor environments, but position recognition accuracy is reduced compared to direct GPS reception
Solution Approach 1:
The patent merges multiple positioning data sources including GPS direct reception, RSU-assisted positioning, and inertial navigation system data into a unified positioning framework. By combining these complementary sources, the system maintains higher accuracy across different environments than any single method could achieve alone.
Solution Approach 2:
The patent implements dynamic switching and weighting of positioning methods based on environmental conditions. The system automatically adjusts the reliance on GPS versus RSU-assisted positioning in real-time, optimizing accuracy for the current operational context whether the vehicle is in open space, urban canyon, or indoor environment.
3Measurement precision
If multiple RSUs are deployed to improve positioning accuracy, then position recognition performance is enhanced, but system complexity and infrastructure cost increase
Solution Approach 1:
The patent segments the positioning function into hierarchical levels: GPS satellite segment, RSU infrastructure segment, and vehicle onboard segment. Each segment performs specific tasks independently, and the results are integrated at the vehicle's positioning processor. This segmentation allows the system to achieve high accuracy without requiring a monolithic complex system.
Data Source
AI summary
Disclosed is a method of acquiring position information of a vehicle by a V2X communication device of a vehicle through V2I communication. Specifically, the method of acquiring position information of the vehicle includes receiving a first V2I message including position information, transmission power information, and coverage information of a first road side unit (RSU) from the first RSU; acquiring reception power of the first V2I message; and acquiring region information of the vehicle based on the reception power and the coverage information, wherein the region information indicates based on (1) the vehicle being located within the coverage of the first RSU or (2) a specific region within the coverage of the first RSU.