Intermittent Localization Switching for Accuracy and Power Balance
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Solution Overview
Problem
Mobile devices face challenges in achieving accurate location determination while managing limited power resources, with existing localization techniques often requiring high power consumption for high accuracy and low power consumption for low accuracy, leading to varying accuracy and power inefficiencies.
Innovation Solution
A combination localization technique that adaptively switches between different localization methods, such as inertial positioning and SLAM, to periodically correct accuracy errors and manage power consumption, using a phased approach to satisfy target error and power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high power localization technologies are used, then localization accuracy is improved, but power consumption increases
Solution Approach 1:
The system dynamically switches between different localization techniques (WiFi, inertial, vision-based) based on current accuracy requirements and power availability. The localization manager adjusts which technique is active at any given time, making the system adaptable rather than static.
Solution Approach 2:
The system performs intermittent high-power localization updates at scheduled intervals or when accuracy thresholds are not met, rather than continuously. Low-power inertial localization runs continuously, with periodic corrections from higher-accuracy methods.
2Use of energy by moving object
If low power localization technologies are used, then power consumption is reduced, but localization accuracy deteriorates
Solution Approach 1:
Low-power inertial localization serves as an intermediary technique that bridges between high-power methods. It maintains acceptable accuracy for extended periods between high-power updates, reducing the frequency and duration of high-power localization operations.
Solution Approach 2:
The system applies high-power localization techniques partially (intermittently rather than continuously) to achieve the necessary accuracy corrections. The inertial system runs continuously at low power, providing partial localization functionality that is periodically enhanced by higher-accuracy methods.
3Measurement precision
If multiple localization techniques are combined, then localization accuracy is improved, but device complexity increases
Solution Approach 1:
The localization system is segmented into independent modules (WiFi localization, inertial localization, vision-based localization) that can be individually managed. The localization manager coordinates these segments, activating only the necessary ones based on current needs, thereby reducing effective complexity.
Solution Approach 2:
The localization manager serves multiple functions: it selects appropriate localization techniques, monitors their performance, manages power consumption, and coordinates transitions between methods. This universal controller simplifies the overall system architecture by providing centralized management.
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.