Regional GNSS Correction Data Decoding for Fast Convergence
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Solution Overview
Problem
Current Global Navigation Satellite Systems (GNSS) processing methods face challenges in achieving fast convergence to accurate position solutions, particularly in precise point positioning, due to limitations in handling ionospheric and tropospheric delays, and require extensive bandwidth for data transmission.
Innovation Solution
The development of methods and apparatus for processing GNSS data using multi-frequency code and carrier observations, which provide correction data including ionospheric and tropospheric delays, phase-leveled geometric corrections, and code biases, enabling more efficient and accurate positioning by reducing bandwidth requirements and improving convergence times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional GNSS processing methods are used, then position solutions can be obtained, but convergence time is slow and bandwidth requirements are high
Solution Approach 1:
The patent segments correction data into regional components, processing GNSS data in regional networks rather than globally. This segmentation allows faster convergence by reducing the spatial scope of corrections needed, while also reducing bandwidth requirements by transmitting only regional correction data rather than complete global datasets.
Solution Approach 2:
The patent extracts and transmits only the essential correction parameters (ionospheric delays, tropospheric delays, phase-leveled geometric corrections, and code biases) needed for precise positioning, rather than transmitting complete raw observation data. This extraction approach significantly reduces bandwidth requirements while maintaining positioning accuracy.
2Measurement precision
If complete correction data is transmitted, then positioning accuracy is maintained, but bandwidth consumption increases
Solution Approach 1:
The patent extracts only the critical correction parameters (ionospheric delays, tropospheric delays, phase-leveled geometric corrections, and code biases) required for achieving centimeter-level positioning accuracy. By transmitting only these essential parameters rather than complete observation datasets, the system maintains high positioning accuracy while significantly reducing bandwidth consumption.
Solution Approach 2:
The patent changes the form of transmitted data from complete raw observations to processed correction parameters. This parameter transformation reduces data volume while preserving the essential information needed for accurate positioning, effectively decoupling positioning accuracy from bandwidth consumption.
3Productivity
If regional correction systems are implemented, then convergence speed improves, but system complexity increases
Solution Approach 1:
The patent implements regional correction networks that segment the global GNSS system into manageable regional units. Each regional network processes and transmits corrections independently, which accelerates convergence speed by reducing the spatial scope of corrections. The modular regional structure actually simplifies system management compared to a monolithic global system.
Data Source
AI summary
A correction message for regional GNSS data includes at least one network message and at least one cluster message. The at least one network message relates to stations of a network of stations within a region. The at least one cluster message relates to a subset of stations within the region. Network elements are extracted from the network message and cluster elements are extracted from the cluster message. Network elements and cluster elements are used to determine a position of a rover within the region.