UFS Low-Voltage Power Cutoff to Prevent File System Damage
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Solution Overview
Problem
The occurrence of probabilistic file system damage in electronic devices using UFS is caused by prolonged operation at low voltages, leading to erroneous shutdowns and user experience issues.
Innovation Solution
Implementing a UFS protection mechanism with a voltage threshold of 2.35 V < x < 3 V and a duration threshold of 50 ms < t < 1 s, using a coulometer and control module to monitor battery voltage and control power supply to UFS, avoiding erroneous shutdowns and file system damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery voltage monitoring threshold is set to trigger shutdown when voltage drops below a certain level, then the UFS is protected from operating at low voltage, but the device may experience erroneous shutdowns during normal operation
Solution Approach 1:
The patent applies preliminary action by monitoring battery voltage in advance and predicting future voltage trends. When the voltage is predicted to drop below the threshold within a predetermined time, the system proactively reduces UFS performance before the actual voltage drop occurs, preventing low-voltage operation issues without causing unnecessary shutdowns during normal operation.
Solution Approach 2:
The patent implements feedback by continuously monitoring battery voltage and using this information to dynamically adjust UFS performance. The voltage monitoring module provides real-time feedback to the performance adjustment module, which modifies UFS operation based on the predicted voltage trend, creating a closed-loop control system that balances protection with operational continuity.
2Reliability
If the voltage monitoring is performed continuously to detect low voltage conditions, then the UFS protection is timely, but the power consumption increases
Solution Approach 1:
The patent applies periodic action by performing voltage monitoring at specific intervals rather than continuously. The voltage monitoring module checks battery voltage periodically and uses trend analysis to predict future voltage levels, reducing power consumption while maintaining adequate detection accuracy for protecting UFS operation.
3Reliability
If the UFS performance is reduced when low voltage is predicted, then file system damage is prevented, but the storage speed and performance decrease
Solution Approach 1:
The patent applies dynamics by making UFS performance adjustable rather than fixed. The performance adjustment module dynamically modifies UFS operation parameters based on predicted battery voltage levels, reducing performance only when necessary to prevent file system damage, and restoring full performance when voltage conditions are adequate.
Data Source
AI summary
An electronic device to reduce probability of file system damage when using a universal flash storage (UFS). The electronic device includes: a UFS; a battery, configured to supply power for the UFS; and a control device, configured to control the battery to stop supplying power for the UFS when duration for which a voltage of the battery is less than a preset voltage value x is greater than or equal to preset duration t, where 2.35 V<x<3 V, and 50 ms<t<1 s.