Wireless Positioning System Dynamic Reference Strength
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Solution Overview
Problem
Existing positioning systems that use radio wave strength to estimate the position of wireless transmission terminals face challenges with computational load and accuracy due to varying individual differences and carrying circumstances of the terminals, leading to exclusion of relevant data and increased load.
Innovation Solution
A positioning system that dynamically sets reference strengths for each wireless transmission terminal, using statistical methods to determine and apply first and second reference strengths as threshold values, reducing unnecessary data transmission and maintaining position-fixing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed threshold value is provided for radio wave strength to reduce communication load and computational load, then communication efficiency is improved, but position-fixing accuracy deteriorates because relevant data may be excluded due to individual differences and carrying circumstances of terminals
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed threshold value to a dynamic reference strength value that is individually determined for each wireless transmission terminal based on its characteristics and environment. This allows the threshold to adapt to individual differences and carrying circumstances, maintaining position-fixing accuracy while still filtering unnecessary data to preserve communication efficiency.
Solution Approach 2:
The patent changes the parameter from a static fixed threshold to a dynamic reference strength value that varies per terminal. By determining reference strengths individually for each terminal based on their specific characteristics and environmental factors, the system optimizes both communication efficiency and position-fixing accuracy, resolving the contradiction between data filtering effectiveness and measurement precision.
2Measurement precision
If individual reference strengths are determined for each wireless transmission terminal to maintain position-fixing accuracy, then measurement precision is improved, but device complexity increases due to additional data management and processing requirements
Solution Approach 1:
The patent applies preliminary action by determining the reference strength for each wireless transmission terminal in advance, before actual position estimation is performed. This pre-determination of terminal-specific reference strengths allows the system to maintain high position-fixing accuracy without increasing complexity during real-time operation, as the individualized parameters are prepared beforehand.
Solution Approach 2:
The system determines reference strengths for each terminal based on their individual characteristics and environmental factors, allowing each terminal to effectively 'serve itself' with its own optimized parameters. This self-service approach enables individualized accuracy without requiring complex centralized management of each terminal's specific conditions during operation.
3Measurement precision
If all reception data are transmitted to the estimating device to ensure complete information for position estimation, then measurement precision is maintained, but communication load increases
Solution Approach 1:
The patent extracts only the necessary position estimation data that meet the terminal-specific reference strength criteria, rather than transmitting all reception data. By filtering data based on individually determined reference strengths, the system maintains position estimation accuracy while significantly reducing communication load and energy consumption associated with data transmission.
Solution Approach 2:
The patent applies local quality by setting different reference strength thresholds for different terminals based on their specific characteristics and environments. This localized optimization allows each terminal to have its own data filtering criteria, ensuring that each terminal receives the appropriate level of data detail needed for accurate position estimation without uniformly increasing communication load across all terminals.
Data Source
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AI summary
To reduce the computational load in a positioning system that uses radio wave strength to estimate the position of a wireless transmission terminal. A positioning system (10) is equipped with a position estimating component (66) that estimates the positions of a first wireless transmission terminal (101) and a second wireless transmission terminal (102) on the basis of disposed positions of plural wireless receivers (70) using first position estimation data and second position estimation data in a limited range of reception data generatable by the plural wireless receivers (70). At least one of the position estimating component (66) and the plural wireless receivers (70) acquires the first position estimation data limited to a first set region suited to the first wireless transmission terminal (101) from among the reception data receivable in regard to the first wireless transmission terminal (101) and acquires the second position estimation data limited to a second set region suited to the second wireless transmission terminal (102) from among the reception data receivable in regard to the second wireless transmission terminal (102).