Positioning Integrity Control With Hierarchical Alarm Feedback
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Solution Overview
Problem
Current positioning systems lack a feasible solution for evaluating positioning integrity, leading to poor accuracy and reliability due to unaddressed error sources and the absence of an alarm mechanism for system positioning errors.
Innovation Solution
Implementing a hierarchical alarm mechanism that indicates error information and performs positioning error correction based on error sources and values, ensuring timely warnings and adjustments to maintain positioning accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional positioning systems operate without an alarm mechanism, then the system complexity is reduced, but positioning integrity and reliability deteriorate
Solution Approach 1:
The patent implements preliminary action by establishing alarm thresholds and monitoring mechanisms in advance. The location management device pre-configures alarm conditions (such as protection level exceeding thresholds) and continuously monitors positioning parameters before failures occur. This allows the system to detect and report integrity issues proactively, maintaining reliability without requiring complex real-time intervention mechanisms.
Solution Approach 2:
The patent applies feedback by implementing an alarm information feedback mechanism. When positioning parameters exceed predetermined thresholds, the location management device generates alarm information and returns it to the terminal device. This feedback loop enables the terminal to be aware of integrity issues and take appropriate actions, improving positioning integrity while keeping the overall system structure relatively simple.
2Measurement precision
If positioning systems do not evaluate error sources comprehensively, then the measurement process is simplified, but positioning accuracy deteriorates
Solution Approach 1:
The patent segments the error evaluation process by categorizing error sources into distinct types (e.g., measurement errors, system errors, environmental errors). The location management device evaluates each error source separately using specific parameters such as protection level, error source identification, and error value. This segmentation allows comprehensive error analysis while maintaining clear, manageable evaluation procedures for each error type.
Solution Approach 2:
The patent utilizes parameter changes by monitoring multiple positioning parameters (protection level, alarm level, error value) that can change based on different error conditions. The system adjusts its evaluation criteria based on the current state of these parameters, enabling accurate positioning while adapting the complexity of error evaluation to the specific operational context.
3Reliability
If the system waits until positioning failure occurs before alarming, then the alarm mechanism is simpler, but positioning reliability deteriorates
Solution Approach 1:
The patent implements preliminary action by establishing alarm thresholds and monitoring mechanisms in advance. The location management device pre-configures alarm conditions (such as protection level exceeding thresholds) and continuously monitors positioning parameters before failures occur. This allows the system to detect and report integrity issues proactively, maintaining reliability without requiring complex real-time intervention mechanisms.
Solution Approach 2:
The patent applies beforehand cushioning by creating a buffer between normal operation and complete failure through intermediate alarm levels. The system provides early warning when parameters approach critical thresholds, giving the terminal device time to prepare for potential failures or switch to alternative positioning methods. This cushioning approach improves reliability while avoiding the need for overly complex real-time response systems.
Data Source
AI summary
A method for controlling positioning integrity. A location management device receives a first message sent by a terminal device, where the first message includes a first parameter set. The first parameter set includes measurement information and/or error information relating to location information of the terminal device. The error information is related to the positioning integrity. The location management device obtains a first positioning result based on the first parameter set and/or positioning assistance data. The first positioning result includes location information and/or integrity information of the terminal device. The integrity information includes the error information and/or alarm information, and the alarm information includes a determining result obtained by comparing the first positioning result with a preset determining condition.