External Power Measurement for Mobile Devices
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Solution Overview
Problem
Existing methods for measuring power consumption in mobile devices suffer from a 'probe effect,' where collecting power information increases device power consumption and makes it difficult to separate component power usage, and they cannot accurately observe the device's inherent operation in power-saving modes.
Innovation Solution
A system comprising a mobile device, a measurement and analysis device, and a learning server that collects operation information, measures total power consumption, and uses machine learning to estimate component states and power consumption without a probe effect, allowing real-time visualization of component power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If model-based power estimation is used to collect operation information of components, then power consumption amounts of each component can be estimated, but the collection activity itself increases device power consumption and creates a probe effect that interferes with normal device operation
Solution Approach 1:
The patent introduces a separate measurement device as an intermediary that measures the power consumption of the mobile device externally, rather than having the mobile device collect its own power information. This mediator approach eliminates the probe effect because the measurement activity occurs outside the measured system, preventing any interference with the device's normal operation and power consumption patterns.
2Loss of information
If component operation collection module is added to collect operation information, then power consumption amounts of components can be analyzed, but it generates additional calculation overhead and probe effect that distorts inherent device operation
Solution Approach 1:
The patent extracts the measurement function from the mobile device itself and places it in a separate external measurement device. This extraction eliminates the need to add collection modules, drivers, or calculation mechanisms to the mobile device, thereby avoiding any increase in device complexity or generation of probe effects that would distort the device's inherent operation.
Solution Approach 2:
The patent creates a separate measurement device that copies or replicates the measurement capability outside the original system. Instead of modifying the mobile device to collect its own power information, a duplicate measurement function is implemented in an external device, eliminating the probe effect while maintaining measurement capability.
3Use of energy by moving object
If entire power consumption is measured without component-level information, then device power consumption can be known, but it is impossible to identify which components consume power and why power efficiency is low
Solution Approach 1:
The patent applies segmentation by dividing the measurement process into two independent parts: (1) measuring the entire device's power consumption externally using a measurement device, and (2) separately collecting component operation information from the device's existing interfaces. This segmentation allows obtaining both total power consumption and component-level information without the probe effect, as the measurement itself does not interfere with component operation.
Data Source
AI summary
The power measurement and analysis system of a mobile device includes: a mobile device collecting operation information of components operating in accordance with execution of an application; a measurement and analysis device supplying power to the mobile device and measuring the entire power consumption amount of the mobile device; and a learning server receiving the operation information of the components from the mobile device and the entire power consumption amount from the measurement and analysis device, learning a component state estimation model using the operation information of the components and the entire power consumption amount, and providing the learned component state estimation model to the measurement and analysis device. The measurement and analysis device estimates component states by inputting the entire power consumption amount of the mobile device to the component state estimation model, and calculates power consumption of each of the components in real time.