Cell-Based Location Determination System for Indoor Positioning
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Solution Overview
Problem
Existing location-based services on mobile terminals face challenges in accurately determining user location, especially in areas with poor GPS signal, leading to user dissatisfaction and inaccurate service provision.
Innovation Solution
A method and system that uses cell information to determine location coordinates based on centroid values of base station cells, providing accurate and quick location-based services by matching cell information with location data stored in a database, and updating location information using GPS or additional data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS location service is used to determine precise location, then measurement precision is improved, but loss of time increases due to establishment time and latency
Solution Approach 1:
The system pre-calculates and stores centroid values for multiple cell coverage areas in advance within a location information database. When location determination is needed, the system directly queries the database using cell information (cell ID, LAC, etc.) to obtain pre-computed centroid coordinates, eliminating the time-consuming process of real-time GPS signal acquisition and processing while providing immediate location results.
2Measurement precision
If GPS location service is used to determine precise location, then measurement precision is improved, but reliability deteriorates in areas with poor GPS signal such as indoors or underground
Solution Approach 1:
The system introduces cell information (cell ID, location area code, base station identifier) as an intermediary to determine location. Instead of relying directly on GPS signals which may be blocked, the system uses the mobile terminal's connection to base stations as a mediator. The terminal reports cell information to the server, which queries the database to determine location, ensuring service availability even when GPS signals are unavailable indoors or underground.
3Loss of time
If cell information matching method is used to determine location, then loss of time is reduced through quick database lookup, but measurement precision may deteriorate compared to GPS
Solution Approach 1:
The system changes the parameter used for location determination from GPS coordinates to cell information parameters (cell ID, location area code, base station identifier). By querying the database using these cell parameters and retrieving pre-stored centroid values, the system achieves fast response times. To improve precision, the system can combine multiple cell information sources or use the determined cell-based location to initialize and refine GPS location data when available.
Data Source
AI summary
Disclosed is a location information determining method and system for providing a variety of services based on a location. The location information determining method includes receiving cell information; and determining location information that matches the cell information as location information of a mobile terminal from a location information database that stores location information that matches a plurality of pieces of cell information, respectively.