Positioning Access Point Selection for WLAN Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing WLAN positioning methods face challenges in accurately selecting positioning access points (APs) that are close to the terminal, leading to decreased precision and efficiency in terminal positioning.
Innovation Solution
A method and device for selecting positioning APs, where a positioning server acquires candidate AP sets that enclose the terminal and are closest to it, using a preset threshold to exclude farther APs, thereby improving the accuracy and efficiency of terminal positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing WLAN positioning methods are used to select positioning APs, then the positioning process can be completed, but the precision of terminal positioning decreases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing the enclosure relationships between AP sets and terminal positions before actual positioning occurs. The positioning server pre-determines which AP sets enclose potential terminal locations and stores this information, so that when positioning is needed, the system can directly retrieve pre-processed data rather than performing complex real-time calculations, thereby improving both precision and efficiency
Solution Approach 2:
The patent segments the positioning problem by dividing APs into multiple sets (first AP set, second AP set, third AP set) based on their spatial relationships with the terminal. Each set is evaluated independently for enclosure properties, and the segmentation allows the system to process and compare different AP sets systematically to identify the optimal positioning APs, resolving the contradiction between comprehensive evaluation and computational efficiency
2Adaptability or versatility
If more APs are included in positioning calculations, then positioning coverage is improved, but the complexity of positioning calculations increases
Solution Approach 1:
The patent extracts and removes APs from the positioning calculation that do not satisfy the enclosure condition. By evaluating which AP sets actually enclose the terminal and excluding those that don't, the system reduces the number of APs needing to be processed for positioning calculations, thereby decreasing computational complexity while maintaining adequate positioning coverage through the use of only relevant APs
Solution Approach 2:
The patent applies local quality by treating different AP sets differently based on their specific spatial relationship with the terminal. Instead of uniformly processing all APs, the system evaluates and processes only those AP sets that have the specific property of enclosing the terminal, allowing localized optimization of positioning calculations based on the actual geometric relationships in the WLAN environment
Data Source
AI summary
A positioning server may acquire at least one candidate AP set from an initial AP set, wherein each of the at least one candidate AP set includes a preset number of APs enclosing a terminal which is to be positioned. The positioning server may select a target AP set from the at least one candidate AP set, wherein a distance from each of the APs included in the target AP set to the terminal is less than a preset threshold. The positioning server may determine the preset number of APs included in the target AP set as positioning APs for positioning the terminal.