Indoor Location Detection Using Signal Pattern Matching
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Solution Overview
Problem
Existing electronic devices face challenges in accurately detecting their location indoors due to environmental changes and the need for continuous maintenance of indoor geographic and wireless signal maps, which can lead to measurement errors and increased missed detection or false alarm probabilities.
Innovation Solution
The electronic device employs a method that determines entry into a specific region by selecting appropriate signal types based on moving path data, comparing pre-processed measurement data with stored data patterns, and using sensor modules to generate and detect virtual markers, thereby improving location detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS satellite signals are used for location detection, then outdoor location accuracy is improved, but indoor location detection accuracy deteriorates due to signal blockage and environmental changes
Solution Approach 1:
The patent segments the location detection system into multiple independent modules: GPS module for outdoor detection, wireless signal module for indoor detection, and sensor module for path tracking. Each module operates independently in its optimal environment, with the processor selecting the appropriate module based on current location context, thereby maintaining high accuracy across both indoor and outdoor scenarios
Solution Approach 2:
The patent creates a universal location detection system that can operate in both outdoor and indoor environments by integrating multiple detection methods. The system uses GPS for outdoor locations and switches to wireless signal strength comparison for indoor locations, while maintaining a unified coordinate system and path tracking mechanism that works across both environments
2Measurement precision
If indoor geographic maps and wireless signal maps are continuously maintained, then location detection accuracy is improved, but system complexity and maintenance requirements increase
Solution Approach 1:
The patent performs preliminary actions by pre-acquiring wireless signal strength data at multiple locations before actual location detection is needed. These signal strength values are stored in advance in the processor's memory, creating a reference database that enables accurate indoor location detection without requiring real-time map updates or continuous maintenance
Solution Approach 2:
The patent creates a simplified digital representation of the indoor environment by copying and storing wireless signal strength characteristics at key locations. Instead of maintaining detailed geographic maps, the system uses copied signal strength profiles that can be easily stored and compared, reducing maintenance complexity while preserving location detection accuracy
3Measurement precision
If multiple signal types are used for location detection, then location accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic signal type selection based on the current operational context. The processor dynamically switches between GPS module and wireless signal module based on whether the device is indoors or outdoors, and selects appropriate sensor combinations based on motion state. This dynamic adaptation ensures high location accuracy while minimizing energy consumption by activating only the necessary components
Data Source
AI summary
Disclosed is a location detecting method of an electronic device including determining whether the electronic device enters a first region including a first location that is a specific path and/or specific region, when the electronic device enters the first region, selecting a signal type capable of being supported by the electronic device among a signal type list of items defined as moving path data corresponding to the first location, distinguishing the first data, in which a parameter feature is present, and second data having a maintenance pattern for a moving path, among the signal type, comparing first data of the moving path data with first data of measurement data measured by the electronic device, and when the first data of the moving path data corresponds to the first data of the measurement data, comparing patterns after pre-processing both second data of the moving path data and second data of the measurement data to determine whether to enter the first location.