User Terminal Location Estimation via Movement Pattern Clustering
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Solution Overview
Problem
The high power consumption of GPS receivers in mobile terminal apparatuses and their reduced functionality in areas with satellite obstructions necessitate an alternative method for estimating user location without relying solely on GPS signals.
Innovation Solution
A user terminal apparatus equipped with sensors to detect movement patterns, a storage system to match these patterns with location information, and a processor to estimate the user's location based on previously collected data, reducing the need for continuous GPS usage by clustering coordinate information and updating place information accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS receiver is used to obtain exact location, then location accuracy is improved, but power consumption increases
Solution Approach 1:
The patent divides location determination into two segments: GPS-based exact location detection and sensor-based movement pattern recognition. The system uses GPS periodically or when movement patterns change, while relying on sensor data for continuous location estimation, thereby reducing GPS power consumption while maintaining location accuracy
Solution Approach 2:
The system performs preliminary actions by pre-collecting movement data from sensors (accelerometer, gyroscope, barometer) and pre-processing this data to identify movement patterns. This preliminary data collection allows the system to estimate location without continuously activating the power-intensive GPS receiver
2Measurement precision
If GPS receiver is used in areas with satellite obstructions, then location accuracy deteriorates, but alternative methods increase power consumption
Solution Approach 1:
The patent introduces sensor data (accelerometer, gyroscope, barometer) as an intermediary to bridge the gap when GPS is unavailable. These sensors indirectly track movement and infer location changes without requiring direct satellite signals, thus maintaining functionality in obstructed areas while consuming less power than continuous GPS
3Measurement precision
If continuous GPS signal reception is implemented, then location tracking accuracy is improved, but battery life decreases
Solution Approach 1:
The system implements periodic GPS signal reception rather than continuous reception. GPS is activated at predetermined time intervals or when movement pattern changes are detected, allowing the system to maintain location tracking capability while significantly reducing power consumption and extending battery life
Data Source
AI summary
A user terminal apparatus is provided. The user terminal apparatus includes a sensor configured to sense a movement of the user terminal apparatus, a storage configured to store a plurality of movement patterns and place information for each time period matching with each movement pattern, and a processor configured to, in response to the movement sensed by the sensor corresponding to one of the plurality of movement patterns, determine a place where the user terminal apparatus is located using a movement pattern corresponding to the sensed movement and place information matching with a present time.