V2X Positioning for Personal Mobility Vehicles
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Solution Overview
Problem
Personal mobility vehicles (PM vehicles) face challenges in accurately determining their position, especially in urban areas and GPS dead zones, which hinders the provision of accurate traffic information due to the limitations of GPS-based positioning systems.
Innovation Solution
A method and apparatus using vehicle-to-everything (V2X) communications to receive Received Signal Strength Indicators (RSSIs) or Time-of-Flight (ToF) values from roadside units, allowing for the deduction of a PM vehicle's position and prediction route, and subsequently determining essential traffic lights to provide accurate traffic information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS-based positioning is used to determine PM vehicle position, then the positioning system is simple and widely available, but positioning accuracy deteriorates in urban areas and GPS dead zones due to signal reflection and blockage
Solution Approach 1:
The patent introduces roadside units (RSUs) as intermediary infrastructure components that establish wireless communication links with PM vehicles. These RSUs act as mediators to transmit positioning-related information (RSSI, ToF values) between the vehicle and the positioning system, enabling accurate position determination in GPS-denied environments through alternative communication-based positioning methods
Solution Approach 2:
The patent replaces the satellite-based GPS electromagnetic positioning mechanism with a ground-based wireless communication positioning mechanism. By substituting satellite signal reception with V2X communication signal reception from roadside units, the system achieves positioning functionality in urban canyons and indoor environments where satellite signals are blocked or reflected
2Measurement precision
If additional positioning apparatus is deployed in GPS shaded areas, then positioning accuracy improves, but device complexity and infrastructure cost increase
Solution Approach 1:
The patent makes roadside units serve multiple functions: they provide V2X communication services for traffic information exchange, enable positioning through RSSI and ToF measurements, and support prediction route calculation. By making RSUs multi-functional, the system avoids deploying separate dedicated positioning infrastructure, thereby reducing overall system complexity while maintaining high positioning accuracy
Solution Approach 2:
The patent enables the positioning system to use existing V2X communication infrastructure and signals that are already being transmitted for other purposes. The roadside units' communication signals are simultaneously used for both traffic information exchange and positioning measurements, allowing the system to self-service its positioning needs without requiring additional dedicated positioning transmitters
3Ease of manufacture
If GPS technology is applied to PM vehicles, then the positioning system is simple to implement, but positioning accuracy deteriorates because PM vehicles travel on diverse routes including sidewalks and alleyways where GPS signals are blocked
Solution Approach 1:
The patent introduces roadside units positioned along diverse routes (sidewalks, alleyways, driveways) as intermediary components that provide localized positioning coverage. These RSUs act as mediators that establish communication links with PM vehicles in environments where satellite signals cannot reach, enabling continuous positioning accuracy across all vehicle operating environments
Solution Approach 2:
The patent transitions from three-dimensional satellite-based positioning to a ground-level two-dimensional communication-based positioning dimension. By establishing positioning infrastructure at ground level along diverse routes rather than relying on overhead satellite signals, the system achieves accurate positioning in urban canyons, sidewalks, and alleyways where satellite geometry is poor
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the accuracy of traffic information provision for PM vehicles across various environments, including urban areas and indoor spaces, by accurately identifying their position and predicting routes, thereby improving traffic flow and user convenience.
Implementation Method 1
receiving, from a PM vehicle, at least one of Received Signal Strength Indicators (RSSIs) or Time-of-Flight (ToF) values of vehicle-to-everything messages (V2X messages)
Data Source
AI summary
Method and apparatus for providing traffic information to personal mobility (PM) vehicle are provided. A computer implemented method includes receiving, from a PM vehicle, at least one of Received Signal Strength Indicators (RSSIs) or Time-of-Flight (ToF) values of vehicle-to-everything messages (V2X messages) generated from roadside units (RSUs) and received by the PM vehicle, and receiving identification information and transmission time points included in the V2X messages. A position and a prediction route of the PM vehicle are deduced based on at least one of the RSSIs or the ToF values, the identification information, and the transmission time points. Then, one or more essential traffic lights among a plurality of traffic lights are determined according to the position and the prediction route of the PM vehicle and identification information of the one or more essential traffic lights is transmitted to the PM vehicle.