SIM Card Detection Failure Recovery via Dynamic Clock Adjustment
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Solution Overview
Problem
Existing electronic devices face issues with SIM card detection failures due to abnormal interruption pins, inconsistent clock frequencies, and abnormal data exchanges, leading to poor user experience and inability to use mobile cellular networks, calls, or SMS services without restarting the device.
Innovation Solution
A method for SIM card detection failure recovery in electronic devices, which involves obtaining power-on information to determine if the SIM card needs to be powered on, and adjusting the clock frequency provided to the SIM card to ensure compatibility, allowing the device to use mobile networks, make calls, and send SMS messages without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic device supplies power to the SIM card based on the electrical level state of the interruption pin, then the SIM card can be powered on for normal operation, but when the interruption pin is abnormal, the SIM card cannot be powered on and remains in a detection failure state
Solution Approach 1:
The patent changes the detection parameter from relying solely on the interruption pin electrical level to a comprehensive detection mechanism that includes multiple detection dimensions (interruption pin state, SIM card insertion detection, communication status). This parameter change enables reliable detection even when the interruption pin is abnormal, allowing the system to accurately identify SIM card detection failures and trigger appropriate recovery operations without requiring user intervention.
2Reliability
If the electronic device restarts to recover SIM card communication, then normal communication can be restored, but user experience deteriorates due to service interruption
Solution Approach 1:
The patent implements preliminary detection of SIM card status and preliminary recovery operations before communication failure occurs or immediately upon detection. The system continuously monitors SIM card status and performs recovery operations (such as resetting the modem or re-initializing the SIM card interface) without requiring device restart. This preliminary action approach restores communication while minimizing service interruption time, maintaining user experience.
3Device complexity
If the electronic device provides a fixed clock frequency to the SIM card, then the system structure is simple, but when the SIM card cannot operate at the provided clock frequency, communication fails with no recovery method
Solution Approach 1:
The patent transforms the static clock frequency provision into a dynamic adaptive system. The system detects SIM card operational status and communication effectiveness, then dynamically adjusts the clock frequency provided to the SIM card. When communication failure is detected, the system can change the clock frequency to a different value that the SIM card can operate at, ensuring continuous reliable operation without requiring device restart or SIM card replacement.
Data Source
AI summary
A subscriber identification module (SIM) card detection failure recovery method for an electronic device includes that the electronic device identifies a card recovery scenario, where card recovery includes whether to power on a SIM card. A configurable timer is started based on the card recovery scenario. The electronic device periodically obtains, based on a time set by the timer, power-on information for powering on the SIM card. The electronic device determines a power-on condition of the SIM card based on the power-on information. If the power-on condition is met, the electronic device powers on the SIM card.