Assisted Satellite Positioning Bandwidth Reduction
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Solution Overview
Problem
Existing satellite-based positioning systems face challenges in indoor environments and limited processing power, where GNSS receivers struggle to acquire and decode signals due to low signal quality, and assistance data transmission requires significant bandwidth.
Innovation Solution
A method and apparatus that assemble and provide assistance data by identifying common and individual parameters for multiple satellite systems, reducing redundancy in parameter transmission to conserve bandwidth while maintaining precision and compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If assistance data is transmitted for multiple satellite systems with complete parameters, then positioning accuracy is improved, but bandwidth consumption increases
Solution Approach 1:
The assistance data is segmented into common parameters (valid for multiple satellite systems) and system-specific parameters. The common parameters are extracted and transmitted once, while only the differential or system-specific parameters are transmitted for each satellite system, reducing redundant data transmission while maintaining complete positioning information.
Solution Approach 2:
Common parameters across multiple satellite systems (GPS, GLONASS, Galileo, etc.) are merged into a single transmission block. This consolidation eliminates repeated transmission of identical or similar parameters across different satellite systems, significantly reducing bandwidth consumption while preserving positioning accuracy.
2Reliability
If GNSS receiver decodes navigation messages independently, then positioning reliability is improved, but processing time increases
Solution Approach 1:
Assistance data containing pre-decoded navigation information (ephemeris, almanac, clock corrections) is provided to the GNSS receiver before the actual positioning operation. This preliminary provision of decoded data eliminates the need for the receiver to perform time-consuming decoding of navigation messages, significantly reducing processing time while maintaining positioning reliability through accurate satellite orbit and clock information.
Data Source
AI summary
A set of parameters for a plurality of satellites belonging to at least two different satellite systems is assembled. Further, a definition of a data structure is provided, the data structure including at least one section for parameters for a plurality of satellites belonging to at least two different satellite systems.