Intermittent Localization Switching for Power-Accuracy Balance
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Solution Overview
Problem
Mobile devices face challenges in balancing localization accuracy and power consumption, with low-power methods offering low accuracy and high-power methods providing high accuracy but at the cost of increased energy usage.
Innovation Solution
Adaptive combination localization techniques that periodically switch between low-power, low-accuracy methods and high-power, high-accuracy methods to maintain acceptable error rates and power consumption, using a phased approach to correct accumulated errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If low-power localization methods are used, then power consumption is reduced, but localization accuracy deteriorates
Solution Approach 1:
The system implements periodic switching between low-power and high-power localization methods. The high-power method is activated at specific intervals to correct accumulated errors from the low-power method, achieving both power savings and acceptable accuracy. This periodic action allows the system to balance energy consumption with localization precision by using intensive processing only when necessary.
Solution Approach 2:
The system dynamically adjusts the localization strategy based on accumulated error thresholds and power availability. Instead of using a fixed method, the system transitions between low-power and high-power approaches adaptively, making the localization system flexible and responsive to changing conditions while maintaining acceptable accuracy levels.
2Measurement precision
If high-power localization methods are used, then localization accuracy is improved, but power consumption increases
Solution Approach 1:
The system applies high-power localization methods partially, only when and where needed to correct accumulated errors, rather than continuously. This partial action approach uses intensive processing selectively to achieve sufficient accuracy without the constant energy cost of high-power methods, optimizing the balance between precision and power consumption.
Solution Approach 2:
High-power localization is executed periodically at predetermined intervals or when error thresholds are exceeded, rather than continuously. This periodic execution maintains localization accuracy by regularly correcting drift while significantly reducing overall power consumption compared to continuous high-power operation.
3Use of energy by moving object
If low-power localization methods are used continuously, then power consumption is minimized, but accumulated error increases over time
Solution Approach 1:
The system periodically activates high-power localization methods to reset and correct accumulated errors from continuous low-power operation. This periodic correction prevents error drift while maintaining low average power consumption, as the high-power method is used only intermittently rather than continuously.
Solution Approach 2:
The system monitors accumulated localization error and uses this feedback to trigger high-power correction methods when error thresholds are exceeded. This feedback mechanism ensures that accumulated error is kept within acceptable bounds while minimizing the use of high-power methods, optimizing the balance between accuracy and power consumption.
Data Source
AI summary
Performing a combination localization technique includes determining a target localization parameter, selecting a combination localization technique in accordance with the target localization parameter, including a first localization technique associated with a first power error time profile, and a second localization technique associated with a second power error time profile. A device location is determined using the first localization technique for a first time period in accordance with the first power error time profile, and an updated device location is determined using the second localization technique in response to a triggering condition. A further updated device location is determined using the first localization technique following the first time period based on the updated device location. At least one of a combined energy value and a combined maximum error rate for the combination localization technique satisfies the target localization parameter.