Mobile Location Tracker Mode Switching for Battery Optimization
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Solution Overview
Problem
Existing location tracking systems for mobile devices face challenges in efficiently managing resource consumption, particularly battery life, when tracking employees visiting multiple points of interest (POIs), leading to potential inaccuracies in tracking due to quick resource depletion.
Innovation Solution
Implementing a method that transitions the mobile location tracker through operational modes such as conserve and active modes, using a combination of tracking technologies like GPS and cell towers, and calculating an Estimated Time of Arrival (ETA) to optimize resource usage, switching to active mode only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous location tracking is performed using GPS, then tracking accuracy is improved, but battery consumption increases
Solution Approach 1:
The system dynamically adjusts tracking granularity based on proximity to POIs. When near a POI, fine-grained GPS tracking is activated for accurate location verification. When far from POIs, coarse-grained tracking using less power-intensive methods (cell tower triangulation, Wi-Fi positioning) is used, thereby reducing battery consumption while maintaining adequate tracking accuracy.
Solution Approach 2:
Different tracking methods are applied to different spatial zones. High-accuracy GPS tracking is localized to POI proximity areas where precision is critical for compliance verification. Lower-power coarse tracking methods are applied in transit areas, creating a spatially varying tracking quality that optimizes the balance between accuracy and energy consumption.
2Measurement precision
If fine grained location tracking is used continuously, then location accuracy is improved, but resource depletion occurs quickly
Solution Approach 1:
The system implements periodic reassessment of tracking needs based on ETA to POIs. Before approaching a POI, the system switches to fine-grained tracking mode. After leaving the POI area, it transitions back to coarse-grained mode. This periodic switching pattern ensures high accuracy is maintained only when necessary, extending battery life throughout the overall journey.
Solution Approach 2:
Instead of continuously applying full fine-grained tracking, the system applies partial tracking (coarse-grained) during periods when high precision is not needed. Fine-grained tracking is activated partially only during critical periods near POIs, providing sufficient accuracy for compliance verification without the excessive resource consumption of continuous fine tracking.
3Use of energy by moving object
If the tracker switches modes frequently, then resource optimization is improved, but system complexity increases
Solution Approach 1:
The system calculates ETA to POIs in advance using route planning data and current location. Based on this preliminary calculation, it proactively switches to fine-grained tracking mode before actually arriving near a POI. This advance preparation allows smooth mode transitions without frequent rapid switching, reducing system complexity while maintaining resource optimization.
Solution Approach 2:
The system continuously monitors location, ETA, and battery status, using this feedback to make informed decisions about mode switching. The feedback loop ensures transitions occur at optimal moments based on actual conditions rather than arbitrary timing, reducing unnecessary mode changes and simplifying control logic while achieving resource optimization.
Data Source
AI summary
Methods and systems for resource optimized, coarse and fine grained location tracking for planned journey are disclosed. A method for tracking a mobile device with respect to a point of interest (POI) using a mobile location tracker includes a conserve mode in which the mobile location tracker is turned off. The conserve mode comprises determining, by an analyzer module, whether to assess an estimated time to arrive (ETA) at the POI. If determined to assess the ETA, the conserve mode comprises performing an ETA assess operation comprising receiving the ETA; and if the ETA is not greater than a threshold time, switching from the conserve mode to an active mode, wherein in the active mode the mobile location tracker is turned on. It is determined to assess the ETA if a timer measurement is not less than the reassess time or if a trigger to reassess is received.