GNSS Integrity System for Legal Position Data
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Solution Overview
Problem
Current systems for position and velocity data from Global Navigation Satellite Systems (GNSS) lack guarantees that individual data points are within specified error limits, which is critical for liability and legal applications, as statistical accuracy does not ensure error boundaries, and existing integrity measures are primarily designed for safety-critical applications.
Innovation Solution
A system comprising a mobile unit with a GNSS receiver and a central platform that provides integrity-flagged position and velocity data, using GNSS Integrity Service and specific algorithms to ensure error boundaries are met, ensuring data accuracy for legal and commercial purposes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If statistical accuracy measures are used for position data, then general reliability is improved, but individual data point error boundaries cannot be guaranteed
Solution Approach 1:
The patent segments the integrity verification process into two distinct levels: (1) a central platform that performs statistical analysis on aggregated position data from multiple sources, and (2) individual data point verification using integrity flags and protection levels. This segmentation allows the system to maintain both general statistical reliability and individual data point error boundaries simultaneously, resolving the contradiction between these two requirements.
Solution Approach 2:
The patent introduces an intermediary integrity verification mechanism that acts as a mediator between statistical accuracy measures and individual data point guarantees. The intermediary consists of integrity flags, protection levels, and verification algorithms that translate statistical reliability into concrete error boundary guarantees for each position record, enabling both statistical reliability and individual precision to coexist.
2Measurement precision
If integrity verification algorithms are implemented, then measurement precision is improved, but system complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-computing protection levels and generating integrity flags before position data is used. The central platform performs integrity verification in advance, attaching integrity metadata to position records. This preliminary verification reduces the computational burden during real-time operations and simplifies the overall system architecture by separating verification from usage.
Solution Approach 2:
The patent enables self-service through autonomous integrity verification algorithms that automatically assess position data quality without requiring manual intervention. The system self-flags suspicious data points, automatically computes protection levels, and provides integrity information to users. This automation reduces operational complexity while maintaining high measurement precision through continuous verification.
Data Source
AI summary
A system to provide to different users with information about position coordinates of remote mobile vehicles or individuals (mobile agent) guarantying that each particular position data, as it is provided to the user, is within certain error boundaries. The system is composed by a number of mobile units (MU) installed at the mobile agents and a Central Platform (CP). The MU consists of a GPS/SBAS and/or a Galileo navigation receiver that includes specific autonomous integrity algorithms and a transceiver to transmit GPS/SBAS and/or Galileo derived data to the CP. The CP receives data from MU and enhances position estimation and position integrity. Integrity is guaranteed by the use of a GNSS Integrity service (either provided by SBAS or Galileo) and specific autonomous integrity algorithms that ensure the position integrity in non-controlled environments. The CP provides access to MUs position data to multiple Users via Internet or dedicated telecommunications links. Integrity guarantee of provided position data allows the Users to employ provided position data for legal or commercial purposes where auditability and traceability of position error is required. Besides the support of multiple Users on a single MU allows for the provision of different types of position based services based on the same mobile device.