GNSS Interference Source Tracking for Vehicle Evacuation Guidance
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Solution Overview
Problem
Existing GNSS systems are vulnerable to localized jamming and spoofing, which can cause loss of navigation functions and provide misleading information, and current augmentation systems do not effectively address these issues in real-time for vehicles traversing through affected geographical regions.
Innovation Solution
A system and method that utilizes a central processing system to receive and analyze characteristics of interfering GNSS signals from multiple vehicles, determine the location and movement of interference sources, and provide real-time evacuation guidance parameters to affected vehicles, enabling them to modify their flight paths and mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If satellite-based augmentation systems (SBAS) and ground-based augmentation systems (GBAS) are used to improve GNSS accuracy, then GNSS performance is improved over entire coverage, but localized effects from jamming and spoofing over multiple geographical locations cannot be addressed
Solution Approach 1:
The patent divides the coverage area into multiple geographical regions with individual interference characteristics. Each region is analyzed separately to determine localized jamming and spoofing effects, allowing the system to provide region-specific evacuation guidance rather than applying a single broad coverage approach.
Solution Approach 2:
The system adds a spatial dimension to GNSS interference mitigation by determining geographical locations of interference sources and creating three-dimensional evacuation guidance parameters that account for the spatial distribution of jamming and spoofing effects across multiple locations.
2Reliability
If vehicles equip themselves with GNSS interference detection capability, then they can detect interfering signals, but they still cannot determine how to evacuate the geographical region
Solution Approach 1:
The patent introduces a central processing system as an intermediary that receives interference detection data from multiple vehicles, determines the geographical locations of interference sources, and generates evacuation guidance parameters. This mediator bridges the gap between detection capability and actionable evacuation guidance.
Solution Approach 2:
The system implements a feedback loop where vehicles report interference detections to the central processing system, which then provides evacuation guidance back to the vehicles. This closed-loop system continuously refines evacuation parameters based on actual interference conditions observed by multiple vehicles.
3Reliability
If the system provides real-time evacuation guidance parameters to vehicles, then vehicles can mitigate interference by modifying flight paths, but the system complexity increases
Solution Approach 1:
The central processing system performs multiple functions: it receives interference data from multiple vehicles, determines geographical locations of interference sources, calculates evacuation guidance parameters, and transmits guidance back to vehicles. This multi-functional approach consolidates complexity into a single system rather than requiring complex equipment in each vehicle.
Solution Approach 2:
The system creates simplified representations of complex interference patterns by generating evacuation guidance parameters that copy the essential information needed for mitigation without requiring vehicles to process the full complexity of interference source analysis.
Data Source
AI summary
Techniques for providing evacuation guidance parameters to a vehicle traversing in a geographical region in the presence of interfering GNSS signals are disclosed. In some embodiments, a vehicle can determine evacuation guidance parameters from characteristics of at least one interfering source and implement evasive maneuvers based on the evacuation guidance parameters. Alternatively, a vehicle can send characteristics of at least one interfering source to a central processing system located remotely from the vehicle, and receive evacuation guidance parameters from the central processing system.