V2X Apparatus Positioning via Fixed RSU Broadcasts Without GPS
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Solution Overview
Problem
V2X apparatuses struggle to maintain accurate positioning and communication when entering environments with no GPS satellite signal or network signal, leading to disruptions in V2X functionality.
Innovation Solution
Utilizing at least three road side units (RSUs) with fixed locations to broadcast messages containing geographical information and latency data, enabling the V2X apparatus to calculate its location using received broadcast packets even when GPS is abnormal, by employing a communication module, location calculating module, and location recording module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS positioning system is used for V2X apparatus, then positioning accuracy is improved, but reliability deteriorates in environments without GPS satellite signal
Solution Approach 1:
The patent introduces RSUs as intermediary elements to enable positioning without GPS. The V2X apparatus positions itself by measuring latency to multiple RSUs and calculating location based on known RSU positions, using RSUs as mediators between the apparatus and the positioning function.
Solution Approach 2:
The patent changes the positioning parameter from GPS satellite signal reception to radio latency measurement. By measuring the time latency of radio communications with multiple RSUs and using triangulation mathematics, the system achieves positioning through a different physical parameter.
2Device complexity
If V2X apparatus relies on GPS module for positioning, then positioning function is simple, but adaptability deteriorates in environments without GPS signal or network signal
Solution Approach 1:
The patent makes the positioning system universal by enabling it to work in both GPS-available and GPS-denied environments. The V2X apparatus can switch between GPS-based positioning and RSU-based latency triangulation, making the system adaptable to various environmental conditions.
Solution Approach 2:
The patent implements preliminary action by pre-deploying multiple RSUs in the environment before the V2X apparatus needs positioning. These RSUs continuously broadcast their positions and maintain readiness to serve as positioning references when GPS is unavailable.
3Ease of operation
If V2X apparatus uses GPS positioning method, then positioning implementation is straightforward, but loss of information occurs in dead zones without GPS signal
Solution Approach 1:
The patent uses RSUs as intermediaries to prevent information loss in dead zones. Instead of directly relying on GPS satellites, the system uses local RSUs that broadcast positioning information, ensuring continuous availability of positioning data even when GPS signals are blocked.
Data Source
AI summary
A positioning method, device, system, terminal, and a non-transitory computer-readable storage medium are disclosed. The positioning method may include: continuously and at intervals sending broadcast packets including at least RSU location information and message sending time to the vehicle-to-everything (V2X) apparatus (100) through at least 3 road side units (RSUs) (RSU1, RSU2, RSU3) with fixed locations; when the positioning system of the V2X apparatus (100) is abnormal, by using the information in the broadcast packets and the information at the time before the abnormality of the positioning system of the V2X apparatus (100), calculating and obtaining the location information of the V2X apparatus (100) in real time.