SIM Tray Detection Using Segmented Processor Logic
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Solution Overview
Problem
Electronic devices face inaccuracies in detecting whether a SIM card is inserted or if there is an error, particularly due to the tray for loading the SIM card being detached, which can lead to malfunctions and incorrect waterproof function activation.
Innovation Solution
An electronic device with a first processor connected to the tray and a second processor, where the first processor transfers a pre-event upon detecting tray detachment, and the second processor identifies SIM card errors in designated cycles, delaying identification to differentiate between tray detachment and internal SIM card errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If polling signals are used to detect SIM card insertion status, then the detection process is simple, but tray detachment is misidentified as SIM card error
Solution Approach 1:
The detection process is segmented into two independent parts: tray presence detection (via electrical connection status) and SIM card error detection (via polling signals). This segmentation allows the system to distinguish between tray detachment and actual SIM card errors, resolving the misidentification problem while maintaining simple detection methods.
Solution Approach 2:
The system performs preliminary tray presence detection before executing SIM card error detection. By first checking whether the tray is properly inserted (via electrical connection status), the system prevents premature SIM card error detection that would occur if the tray is detached, thereby avoiding false error identification.
2Reliability
If SIM card error detection is performed continuously, then error detection is thorough, but power consumption increases
Solution Approach 1:
The system performs SIM card error detection periodically at designated cycles rather than continuously. This periodic action maintains thorough error detection capability while significantly reducing power consumption compared to continuous detection, resolving the contradiction between reliability and energy usage.
Solution Approach 2:
The system performs preliminary tray presence detection before each SIM card error detection cycle. This preliminary check ensures that error detection is only performed when the tray is properly inserted, maintaining detection thoroughness while avoiding wasted power cycles when the tray is detached.
3Device complexity
If tray detachment is not distinguished from SIM card error, then the system operates simply, but waterproof alerts are triggered erroneously
Solution Approach 1:
The system segments event identification into two distinct categories: tray detachment events (detected via electrical connection status) and SIM card error events (detected via polling signals). This segmentation enables accurate differentiation between the two events, preventing erroneous waterproof alerts while maintaining relatively simple system operation.
Solution Approach 2:
The electrical connection status acts as an intermediary indicator that distinguishes tray detachment from SIM card errors. By monitoring this intermediary parameter, the system can accurately identify tray detachment events and prevent them from being misinterpreted as SIM card errors, thereby avoiding false waterproof alerts.
Data Source
AI summary
Various embodiments of the present invention relate to a method for accurately detecting, by an electronic device, that a tray for loading a SIM card is detached. An electronic device according to various embodiments of the present invention may comprise: a tray for loading a SIM card; a first processor electrically connected to the tray; and a second processor electrically connected to the first processor, wherein the first processor is configured to transfer a pre-event to the second processor when a detachment event for the tray is detected, and the second processor is configured to identify, in each designated period, whether the SIM card is erroneous; and delay identification of whether the SIM card is erroneous, in response to reception of the pre-event. The present invention may further include various other embodiments.