Wireless LAN AP Positioning System with Continuous Database Update

The patent extracts the essential positioning information from numerous reference positions by focusing only on the positions of wireless LAN APs themselves. Instead of storing signal strengths at many reference positions, the system stores only the coordinates of each AP, reducing the database from containing information about numerous reference positions to containing information about finite AP locations only.

The patent inverts the traditional approach by not determining terminal position directly from radio maps, but by determining AP positions first and then using those AP positions to locate terminals. The system continuously updates AP position values based on signal strength measurements, and terminals are positioned relative to these updated AP positions.

The patent implements self-service by enabling the system to automatically detect changes in AP positions and update the database without requiring manual radio map construction. The continuous monitoring and automatic update mechanism allows the system to maintain accuracy while reducing the time and cost associated with frequent manual updates.

The system employs feedback by continuously monitoring signal strength information and using it to detect when AP positions have changed. This feedback loop triggers automatic updates only when necessary, rather than performing continuous updates regardless of actual changes, thereby reducing unnecessary time and computational resources.