Power Management Suspend Mode for Mobile Terminals
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Solution Overview
Problem
Mobile communication terminals often experience unintended power-offs due to temporary external factors like instantaneous contact failures between the battery and terminal, leading to user inconvenience as they need to repeatedly power on the device.
Innovation Solution
A power management method that senses battery voltage and enters a power-off suspend mode when it drops below a threshold, allowing the device to silently recover and reset or power off based on voltage recovery, thereby minimizing user inconvenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the terminal is powered off when battery voltage drops below threshold, then power management is simplified, but the terminal is consistently powered off due to temporary contact failures causing user inconvenience
Solution Approach 1:
The power management system dynamically adjusts its response based on the duration of voltage drop. Instead of a static threshold-based power-off decision, the system introduces a time-based suspension mechanism that adapts to temporary versus permanent battery failures, resolving the contradiction between simple power management and continuous usability.
Solution Approach 2:
The system prepares a power-off suspend mode in advance that acts as a buffer between voltage drop detection and final power-off execution. This cushioning mechanism prevents hasty power-off decisions during temporary contact failures while maintaining the ability to power off when battery failure is confirmed, thus protecting usability without significantly complicating power management.
2Speed
If the terminal immediately powers off when voltage drops, then response time is reduced, but user convenience deteriorates due to frequent reactivation requirements
Solution Approach 1:
The system performs a preliminary assessment by entering a suspend mode before executing the final power-off action. This preliminary step allows the system to verify whether the voltage drop is temporary or permanent, ensuring that power-off only occurs when necessary and maintaining operational reliability while preserving fast response characteristics.
3Reliability
If a power-off suspend mode is implemented to check voltage recovery, then terminal reliability improves, but device complexity increases
Solution Approach 1:
The power management system dynamically transitions between different operational states (normal operation, power-off suspend mode, and final power-off) based on real-time voltage monitoring. This dynamic state machine approach improves reliability by distinguishing temporary from permanent failures while maintaining relatively simple implementation through state-based control logic.
Data Source
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AI summary
A power management method of a mobile communication terminal comprises sensing a characteristic of a battery coupled to the mobile communication terminal, providing a power-off suspend mode for the mobile communication terminal when the sensed battery characteristic falls below a predetermined value, and further sensing the characteristic of the battery while the mobile communication terminal is in the power-off suspend mode. This may include performing a reset of the mobile communication terminal when the further sensed characteristic rises above the predetermined value while the mobile communication terminal is in the power-off suspend mode, and performing a power-off of the mobile communication terminal when the further sensed characteristic remains below the predetermined value for a prescribed time while the mobile communication terminal is in the power-off suspend mode.