Power-Off State Switching for Faster System Restoration
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Solution Overview
Problem
Existing information processing apparatuses take longer to restore from a power-off state that requires hardware reset and program restart compared to a state that does not, leading to inefficiencies in power management and user experience.
Innovation Solution
The apparatus defines two power-off states: one with hardware and program reset, and one without, and records the second power-off state change to restore quickly by storing suspension information in non-volatile memory, allowing fast activation upon power resumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power supply enters the first power-off state (with hardware reset and program restart), then system reliability is improved, but the activation time increases
Solution Approach 1:
The system dynamically selects between two power-off states (first power-off state with hardware reset and program restart, second power-off state without reset) based on operational needs. The processor determines which state to enter by evaluating whether a full reset is necessary, allowing the system to adapt between complete restoration (high reliability) and quick restart (low activation time) scenarios
Solution Approach 2:
The invention changes the parameter of power supply state by defining two distinct states: the first power-off state that performs hardware reset and program restart, and the second power-off state that maintains hardware state without reset. This parameter differentiation allows the system to choose the appropriate state based on whether reliability or activation speed is the priority
2Loss of time
If the power supply enters the second power-off state (without hardware reset and program restart), then the activation time is reduced, but the system may not restore properly after power interruption
Solution Approach 1:
The invention introduces an intermediary mechanism (processor-controlled state management) that mediates between the second power-off state (fast activation) and proper system restoration. The processor records the power-off state and determines whether to enter the second power-off state, ensuring that fast activation does not compromise restoration reliability by making informed decisions about state selection
Solution Approach 2:
The system performs preliminary action by recording the power-off state change before actually transitioning to the second power-off state. This preliminary recording allows the processor to later determine whether to restore from the second power-off state, ensuring proper restoration while maintaining the fast activation capability
Data Source
AI summary
An information processing apparatus includes a processor. A first power-off state, which accompanies a reset of hardware and a restart of a program, and a second power-off state, which does not accompany the reset of the hardware and the restart of the program, are defined as states of a power supply of the information processing apparatus. The processor is configured to record, if an operation for turning off the information processing apparatus is performed and the power supply enters the second power-off state, a change in a state of the power supply to the second power-off state, and change the state of the power supply to the second power-off state if a change in the state of the power supply to the second power-off state is recorded after supply of power to the information processing apparatus is stopped and power is again supplied to the information processing apparatus.