Wireless LAN Positioning via Lattice Cell AP Matching
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Solution Overview
Problem
Current Location Based Services (LBS) using wireless networks face challenges in accurately determining the location of mobile terminals due to limitations in network-based and GPS-based methods, particularly in environments with complex wireless LAN signal interference.
Innovation Solution
A positioning service system that manages peripheral wireless LAN signals by using an AP managing device to collect and store AP identification information from multiple access points, allowing a positioning server to estimate terminal location based on extracted signal data, thereby providing accurate location information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If network-based location identification using base station cell coverage is used, then the service coverage is extended, but the location accuracy deteriorates
Solution Approach 1:
The patent divides the service area into multiple lattice cells, each associated with specific access points. By segmenting the coverage area and using hierarchical matching (lattice cell level + access point level), the system achieves both broad coverage and precise location identification within each segment.
Solution Approach 2:
The patent introduces lattice cells as intermediary structures between base stations and terminal devices. These lattice cells serve as intermediate matching units that bridge the gap between broad network coverage and precise location determination, enabling accurate positioning without requiring direct terminal-to-base-station measurement.
2Measurement precision
If GPS receiver is installed in mobile terminal for location detection, then the location accuracy is improved, but the device complexity and cost increase
Solution Approach 1:
The patent enables the network infrastructure (access points and managing devices) to perform location measurement services autonomously. The terminal device only needs to scan and report available access points, while the network side handles the complex matching and calculation, making the terminal self-sufficient without requiring GPS hardware.
Solution Approach 2:
The patent replaces the mechanical/GPS-based location detection system with a wireless signal-based system. Instead of using GPS satellites and receivers, the system uses wireless LAN access point signals for location determination, substituting a complex hardware-based system with a software-based network solution.
3Measurement precision
If peripheral wireless LAN signals are managed and analyzed, then the location accuracy in complex wireless environments is improved, but the system complexity increases
Solution Approach 1:
The patent segments the wireless signal management into modular components: access points that scan and report signals, an AP managing device that collects and organizes signal data, and a positioning server that performs matching. This segmentation distributes complexity across multiple simple devices rather than concentrating it in one complex system.
Solution Approach 2:
The patent implements preliminary action by having access points continuously scan and report peripheral wireless signals to the managing device, which pre-processes and stores this information. When location determination is needed, the system already has prepared signal data and lattice cell mappings, eliminating the need for complex real-time analysis.
Data Source
AI summary
The present disclosure relates to providing a positioning service by managing a plurality of peripheral wireless LAN signals. The positioning service system collects peripheral wireless LAN radio signals by scanning peripheral access points (APs), stores AP information of each of peripheral wireless LAN radio signals in each lattice cell of a database. When a positioning request signal is received from a terminal, a positioning server of the positioning service extracts AP identification information from included in the peripheral wireless LAN radio signal received from the terminal. By using the extracted AP identification information, the positioning server selects from the database the corresponding lattice cell matching to the stored AP identification information of each of the peripheral wireless LAN radio signals pre-stored. And the positioning server estimates location information of the selected corresponding lattice cell as location information for the terminal.