GNSS Integrity Monitoring via Connected Service
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Solution Overview
Problem
Current Global Navigation Satellite System (GNSS) technologies are vulnerable to jamming and spoofing, which can compromise navigation systems and lead to catastrophic consequences for vehicles relying on them, as existing countermeasures may not be sufficient to protect against these disturbances.
Innovation Solution
A system comprising a GNSS receiver and an Inertial Navigation System (INS) with a processor that analyzes navigation integrity data to identify and generate data on GNSS disturbances, storing and disseminating this information among vehicles to enhance navigation data integrity and protect against jamming and spoofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GNSS technology is used for vehicle navigation, then navigation accuracy and reliability are improved, but vulnerability to jamming and spoofing increases
Solution Approach 1:
The patent introduces an intermediary system consisting of multiple monitoring receivers distributed across different locations that independently verify GNSS signal integrity. These receivers act as mediators between the GNSS satellites and the vehicle navigation system, detecting jamming and spoofing attempts before they affect the vehicle. The monitoring network provides an additional layer of verification that filters out harmful signals while allowing legitimate navigation data to pass through.
Solution Approach 2:
The system implements continuous feedback by constantly monitoring GNSS signal characteristics at multiple receiver locations and comparing them against expected patterns. When anomalies indicating jamming or spoofing are detected, the system provides feedback to alert the vehicle navigation system and adjusts its operation accordingly. This real-time feedback loop enables dynamic adaptation to changing threat conditions.
2Reliability
If countermeasures are implemented to detect GNSS disturbances, then protection against jamming and spoofing is improved, but system complexity increases
Solution Approach 1:
The patent divides the protection system into multiple independent monitoring receivers distributed at different geographic locations rather than using a single complex system. Each receiver independently monitors specific signal parameters, and the results are aggregated to provide comprehensive protection. This segmentation reduces the complexity of individual components while maintaining overall system effectiveness through distributed redundancy.
Solution Approach 2:
The monitoring receivers are designed with multi-functionality, serving both as navigation receivers and as disturbance detection sensors. The same hardware infrastructure supports multiple functions including position determination, signal integrity monitoring, and anomaly detection. This universal design reduces overall system complexity by eliminating dedicated separate systems for different functions.
3Measurement precision
If multiple monitoring receivers are deployed to detect GNSS disturbances, then detection accuracy is improved, but cost and infrastructure requirements increase
Solution Approach 1:
The patent designs the monitoring receivers to serve multiple purposes: they function as both standard GNSS navigation receivers and as specialized disturbance detection sensors. The same antenna, signal processing chain, and computational resources are used for both navigation and security monitoring functions. This multi-functionality reduces the need for separate dedicated monitoring infrastructure, thereby lowering overall costs despite deploying multiple receivers.
Solution Approach 2:
The system merges the navigation function and the security monitoring function into a unified infrastructure. By combining these functions, the patent avoids duplicating hardware and software components, achieving cost-effective deployment of multiple receivers. The shared infrastructure includes common signal acquisition equipment, processing platforms, and data management systems that serve both purposes simultaneously.
Data Source
AI summary
Techniques for incorporating blended Global Navigation Satellite System (GNSS) and Inertial Navigation System (INS) integrity monitoring information as a connected network database are described. Information relating to the integrity of known instances of GNSS disturbances can be stored and accessed by users. The information can include data regarding the integrity of GNSS/INS position solutions generated from vehicles a priori, such as the location, time, and any known causes of the GNSS disturbance. The database can be located on a vehicle and/or on a remote server that can be shared to other users with access to the database. In some embodiments, access can be restricted to certain users if the data stored is confidential.