Adaptive Path-Loss Positioning with Error-Based Formula Tuning
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Solution Overview
Problem
Current positioning methods based on path loss suffer from inaccurate distance fitting formulas, leading to reduced positioning accuracy of terminal devices.
Innovation Solution
A method and apparatus that determine first distances between a terminal device and multiple base stations using path losses and a distance fitting formula, calculate position information, assess position errors, and adjust the formula's parameters based on these errors to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed distance fitting formula is used for positioning, then the positioning process is simple, but the positioning accuracy deteriorates due to inappropriate formula parameters
Solution Approach 1:
The patent implements dynamic adjustment of distance fitting formula parameters based on real-time positioning errors. The system continuously monitors positioning accuracy and adapts formula parameters (such as path loss exponent and reference values) to match current environmental conditions, transforming a static formula into a dynamic adaptive model that maintains high accuracy across varying scenarios
Solution Approach 2:
The patent establishes a feedback mechanism where positioning errors are calculated by comparing estimated positions with actual positions, and these errors are used to adjust the distance fitting formula parameters. This closed-loop feedback system continuously optimizes the formula parameters to minimize positioning errors, resolving the contradiction between simple operation and high accuracy
2Measurement precision
If distance fitting formula parameters are adjusted frequently to improve accuracy, then positioning accuracy improves, but system complexity increases
Solution Approach 1:
The patent implements a self-adjusting mechanism where the system automatically monitors its own positioning errors and autonomously adjusts the distance fitting formula parameters without external intervention. This self-service approach allows the system to maintain high accuracy while minimizing the need for complex external control mechanisms or frequent manual parameter adjustments
3Loss of time
If a simple positioning method is used, then the processing time is short, but the positioning accuracy deteriorates due to inadequate error correction
Solution Approach 1:
The patent applies partial correction by focusing adjustments only on the critical distance fitting formula parameters that have the greatest impact on positioning accuracy. Rather than completely re-calculating all positioning parameters, the system selectively adjusts specific formula parameters based on error analysis, achieving accuracy improvement with minimal additional processing time
Data Source
AI summary
The present disclosure provides a method and apparatus for positioning. One example method includes: determining, by a positioning device, first distances between a terminal device and a plurality of base stations respectively according to path losses of the plurality of base stations and a distance fitting formula; determining, by the positioning device, position information of the terminal device based on the first distances between the terminal device and the plurality of base stations; determining, by the positioning device, a position error of the terminal device based on the position information of the terminal device, position information of the plurality of base stations, and the first distances; and determining, by the positioning device, whether to adjust parameters in the distance fitting formula based on the position error.