UWB Ranging Interval Control for Lower Mobile Phone Power Use
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Solution Overview
Problem
Conventional UWB-equipped devices consume significant power and resources due to constant, static ranging time intervals, even when unnecessary, such as when devices are stationary.
Innovation Solution
Implement a ranging round skipping function that adjusts ranging time intervals based on location measurements, predicting device movement patterns to reduce unnecessary ranging rounds and conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant ranging rounds are performed at a pre-set static ranging time interval, then distance measurement reliability is maintained, but power consumption increases significantly
Solution Approach 1:
The patent applies dynamics by transitioning from a static ranging time interval to a dynamic one. The system adjusts the ranging time interval based on detected device states (moving vs. stationary). When devices are detected to be stationary, the ranging time interval is increased, reducing the frequency of ranging rounds and thereby lowering power consumption while maintaining measurement reliability when needed.
Solution Approach 2:
The patent changes the parameter of ranging time interval from a fixed pre-set value to a variable parameter that adapts based on device movement detection. By monitoring location measurements over time and detecting when devices are stationary, the system modifies the ranging time interval parameter to reduce power consumption during periods when frequent measurements are unnecessary.
2Measurement precision
If ranging rounds are performed frequently at a short ranging time interval, then measurement precision is improved, but resource consumption increases
Solution Approach 1:
The system dynamically adjusts the ranging time interval based on actual device states. When devices are stationary, the interval is extended, reducing the quantity of ranging operations performed. This maintains measurement precision when devices are moving while conserving resources when they are stationary, optimizing the balance between precision and resource consumption.
Solution Approach 2:
The patent implements feedback by continuously monitoring location measurements to detect device movement states. Based on this feedback, the system adjusts the ranging time interval accordingly. When devices are detected to be stationary, the feedback triggers an increase in the ranging time interval, reducing resource consumption while maintaining measurement precision when movement is detected.
3Duration of action of stationary object
If the ranging time interval is extended to reduce power consumption, then battery life is improved, but responsiveness to location changes decreases
Solution Approach 1:
The patent uses dynamics to create a responsive ranging time interval that adapts to device states. When movement is detected, the system automatically reduces the ranging time interval, ensuring rapid responsiveness to location changes. When devices are stationary, the interval is extended to conserve battery life. This dynamic adjustment resolves the contradiction by making the system responsive when needed and power-efficient when not needed.
Solution Approach 2:
The feedback mechanism monitors device movement and adjusts the ranging time interval in real-time. When location changes are detected, the feedback triggers a reduction in the ranging time interval, improving responsiveness. When no movement is detected, the feedback allows the interval to extend, preserving battery life. This ensures the system maintains appropriate responsiveness while optimizing battery life.
Data Source
AI summary
Systems and methods of the present disclosure are directed to a method performed by a first Ultra-Wideband (UWB)-equipped device for reducing UWB power consumption. The method includes, for a plurality of ranging rounds in accordance with a first ranging time interval, sending one or more UWB ranging signals to a second UWB-equipped device and receiving one or more location measurements from the second UWB-equipped device. A location measurement is indicative of a location of the second UWB-equipped device. The method includes, based on the one or more location measurements across the plurality of ranging rounds, modifying the first ranging time interval to a second ranging time interval different than the first ranging time interval.