Geo-fence Positioning System Using CPS and WPS
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Solution Overview
Problem
Existing electronic devices that provide geo-fence services consume significant power due to the reliance on GPS for position determination, which is inefficient in terms of battery life.
Innovation Solution
The use of a Cellular Positioning System (CPS) and Wi-Fi Positioning System (WPS) is adopted to determine the position of an electronic device, selectively switching between these systems based on proximity to a geo-fence area, thereby reducing power consumption while maintaining accurate location tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS is used for position determination in geo-fence service, then location accuracy is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic selection of positioning methods based on device location. When the device is outside the geo-fence area, CPS (cellular positioning) is used for lower power consumption. When approaching or inside the geo-fence area, WPS (Wi-Fi positioning) or GPS is used for higher accuracy. This dynamic adaptation resolves the contradiction by adjusting the positioning method according to operational context.
Solution Approach 2:
The system changes the positioning parameter (method selection) based on the device's geographic context. By monitoring whether the device is within or outside the geo-fence boundary, the system switches between different positioning technologies with different power consumption characteristics, thus optimizing the balance between accuracy and energy usage.
2Use of energy by moving object
If CPS is used for position determination outside geo-fence area, then power consumption is reduced, but location accuracy decreases
Solution Approach 1:
The patent segments the operational area into two zones: outside the geo-fence area and inside/approaching the geo-fence area. In the outer zone, CPS is used for power-efficient monitoring. When the device enters the inner zone (approaching or inside geo-fence), the system switches to WPS or GPS for accurate determination. This segmentation allows each positioning method to be used in its optimal context.
Solution Approach 2:
The geo-fence boundary acts as an intermediary trigger that mediates the switch between positioning methods. When the device crosses or approaches this boundary, it triggers a transition from low-power CPS to high-accuracy WPS/GPS, ensuring that accuracy is maintained precisely when needed for geo-fence detection while minimizing power consumption during routine monitoring.
3Measurement precision
If WPS or GPS is used when closer to geo-fence area, then location accuracy is improved, but power consumption increases compared to CPS
Solution Approach 1:
The system employs periodic monitoring using low-power CPS to detect when the device approaches the geo-fence area. Only when the device enters the proximity zone does the system activate the higher-power WPS or GPS for accurate position determination. This periodic checking approach ensures high accuracy is achieved only when necessary, minimizing overall power consumption while maintaining geo-fence detection capability.
Data Source
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AI summary
A method used by an electronic device 101 receiving a geo-fence service, determines whether a current position of the electronic device, determined using a cellular positioning system (CPS), is located within a first distance 103 from a central point of a geo-fence service area 102. In response to determining that the current position is located within the first distance 103, the current position is determined using a Wi-Fi positioning system (WPS) and it is further determined whether the WPS determined current position is located within a second distance 104 from the central point of the geo-fence service area. In response to the determination the current position is located within the second distance 104, it is determined whether the current position calculated using a global positioning system (GPS), is located within a boundary of a geo-fence service area 102.