Grip Sensor Error Backoff for SAR Compliance
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Solution Overview
Problem
Existing electronic devices face challenges in effectively reducing transmission power to comply with specific absorption rate (SAR) limits, particularly when errors occur in grip sensors, which can lead to non-compliance with SAR regulations and potential harm to users.
Innovation Solution
An electronic device comprising an application processor, a communication processor, and a grip sensor, where the application processor identifies errors in the grip sensor and provides information for backoff operations to the communication processor, enabling the device to adjust transmission power accordingly to prevent SAR violations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device relies on grip sensor information to determine backoff operations, then transmission power can be adjusted based on actual grip events, but grip sensor errors may cause incorrect backoff decisions and SAR regulation violations
Solution Approach 1:
The system performs preliminary actions by proactively reducing transmission power when grip sensor errors are detected, before actual SAR violations can occur. The application processor identifies sensor errors and triggers backoff operations in advance, preventing harmful electromagnetic exposure rather than reacting after violations occur.
Solution Approach 2:
The patent implements beforehand cushioning by creating a safety buffer through transmission power reduction when grip sensor reliability is compromised. This cushioning measure ensures that even if grip detection is inaccurate, the system maintains sufficient safety margin to prevent SAR violations by operating with reduced power as a protective buffer.
2Reliability
If the device continuously monitors grip sensor status to ensure SAR compliance, then transmission safety can be maintained, but system complexity and processing overhead increase
Solution Approach 1:
The patent extracts the error monitoring function as a separate, dedicated task performed by the application processor, independent from the main communication processing. This extraction allows the system to monitor grip sensor status without adding complexity to the communication processor or disrupting normal transmission operations, maintaining simplicity while ensuring reliability.
Solution Approach 2:
The application processor serves as an intermediary between the grip sensor and the communication processor. It monitors grip sensor status, determines whether errors occur, and communicates backoff requirements to the communication processor. This intermediary role simplifies the overall system architecture by centralizing error monitoring logic and preventing direct complex interactions between sensor and communication modules.
Data Source
AI summary
According to an embodiment, an electronic device may include: at least one application processor, comprising processing circuitry, at least one communication processor, comprising processing circuitry, operatively connected to at least one application processor, and at least one grip sensor operatively connected to at least one application processor. At least one application processor, individually and/or collectively, may be configured to cause the electronic device to: identify an error related to at least one of the at least one grip sensor; provide information for causing backoff to at least one communication processor, based on the identification of the error; receive the information for causing the backoff, wherein at least one communication processor, individually and/or collectively, may be configured to perform at least one operation for the backoff, based on the reception of the information for causing the backoff.