V2X Vehicle Positioning via RSU and Surrounding Vehicles
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Solution Overview
Problem
Conventional GPS systems in vehicles are unreliable in indoor environments and urban areas with many buildings, and inertial navigation technologies suffer from position error accumulation, leading to poor position recognition performance.
Innovation Solution
A method and apparatus for obtaining vehicle position information through V2X communication by receiving messages from roadside units and surrounding vehicles, calculating relative positions, and generating cooperative awareness or collective perception messages to determine accurate vehicle positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS system is used for position recognition, then position information can be obtained in open environments, but position recognition performance deteriorates in indoor environments and urban areas with many buildings
Solution Approach 1:
The patent introduces an intermediary positioning system that uses roadside units (RSUs) and surrounding vehicles as mediators to determine position. Instead of directly relying on GPS satellites which are blocked in urban canyons and indoor environments, the system uses local RSUs and vehicles as intermediate reference points to calculate position through message exchange and time difference measurement, thereby resolving the environmental interference problem
Solution Approach 2:
The patent merges multiple positioning approaches by combining V2X communication with RSU infrastructure. It integrates information from multiple sources including V2I messages from RSUs, V2V messages from surrounding vehicles, and timing information to create a hybrid positioning system that overcomes the limitations of single-source GPS positioning in challenging environments
2Reliability
If inertial navigation is used to compensate GPS failure, then position information can be maintained in GPS-denied areas, but position errors accumulate over time
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously receives positioning information from RSUs and surrounding vehicles through V2X messages. This external feedback allows the system to correct accumulated inertial navigation errors by comparing calculated position with positions derived from timing information and known RSU/vehicle positions, thereby maintaining both reliability and accuracy
3Ease of manufacture
If conventional GPS positioning is used, then simple positioning can be achieved, but positioning fails in indoor environments and areas with poor satellite reception
Solution Approach 1:
The patent creates a universal positioning system that can operate in multiple environments (outdoor, urban, indoor) by using V2X communication infrastructure that is already deployed for other purposes. The same communication infrastructure used for vehicle-to-vehicle and vehicle-to-infrastructure communication is leveraged for positioning, making the system universally applicable without requiring separate dedicated positioning hardware
Data Source
AI summary
A method for obtaining, by a vehicle, information regarding its own location through V2X communication is disclosed. Specifically, the method for obtaining location information of a vehicle may comprise the steps of: receiving a V2I message including location information of a road side unit (RSU) from the RSU; receiving a V2X message including reception time information related to a time when the V2I message is received from each of a first surrounding vehicle and a second surrounding vehicle; calculating a relative position of the RSU relative to the current vehicle on the basis of the reception time information and the time at which the current vehicle received the V2I message; and acquiring the location of the current vehicle on the basis of the relative location of the RSU and the location information of the RSU.