Positioning Integrity Assessment Using Terminal-LMF Feedback
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Solution Overview
Problem
Existing positioning integrity determination methods are limited to terminal-based solutions, lacking network-level integrity assessment, which can lead to unreliable positioning systems without timely warnings.
Innovation Solution
Introduce positioning integrity determination methods involving both terminal and network-level components, where the terminal provides assistance information to a Location Management Function (LMF) for comprehensive integrity assessment, and the LMF determines and communicates positioning integrity back to the terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only terminal-based positioning integrity determination is used, then the implementation is simple, but the positioning system reliability is insufficient due to lack of network-level assessment
Solution Approach 1:
The patent divides positioning integrity determination into two independent but complementary parts: terminal-based determination (calculating protection levels) and network-based determination (LMF assessing integrity). This segmentation allows each part to perform its specialized function, improving overall reliability while maintaining manageable complexity through clear division of responsibilities.
Solution Approach 2:
The patent implements feedback mechanisms where the terminal reports protection levels to the LMF, and the LMF provides integrity determination results back to the terminal. This closed-loop feedback enables continuous monitoring and verification of positioning integrity, enhancing system reliability through mutual validation between terminal and network components.
2Reliability
If terminal provides assistance information to LMF for integrity assessment, then the positioning integrity determination becomes more comprehensive, but the information transmission overhead increases
Solution Approach 1:
The patent extracts only the essential assistance information (protection levels and related parameters) that the terminal needs to report to the LMF for integrity determination. By selecting and transmitting only the critical data elements rather than all possible terminal data, the system achieves comprehensive integrity assessment while minimizing information transmission overhead.
Solution Approach 2:
The patent focuses on transmitting specific numerical parameters (protection levels, alert limits, time-to-alert values) that directly relate to positioning integrity. By changing the approach from transmitting raw positioning data to transmitting processed integrity parameters, the system reduces information overhead while maintaining determination accuracy.
Data Source
AI summary
A method for determining positioning integrity includes: sending first assisting information, where the first assistance information is used for assisting a location management function (LMF) in determining the positioning integrity of a terminal. LMF.