Mobile Device Power Management for NFC Reliability
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Solution Overview
Problem
Mobile devices with smart card functionality face issues due to impedance mismatching and operational interference affecting near field communication (NFC) performance, leading to data transmission errors and reduced communication range.
Innovation Solution
A mobile device with a radio frequency communication IC and a smart card IC, where a controller selectively supplies power from a battery to both ICs based on detected residual battery power levels, cutting off power to the RF chip and smart card when thresholds are reached to conserve energy and maintain communication functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is continuously supplied to both RF chip and smart card, then communication functionality is maintained, but battery power is depleted quickly
Solution Approach 1:
The power management system dynamically adjusts power supply to the RF chip and smart card based on real-time detection of residual battery power levels. When battery power is sufficient, both components receive power for full functionality. When battery power falls below thresholds, the system selectively cuts power to non-essential components while maintaining critical NFC communication functionality, thus adapting power consumption to available energy resources.
2Adaptability or versatility
If smart card circuitry is integrated with other mobile device components, then device functionality is enhanced, but impedance mismatching and operational interference occur
Solution Approach 1:
The patent separates the RF chip (handling analog wireless communication) from the smart card circuitry (handling data processing and storage) into distinct functional modules. This segmentation allows each component to operate independently with optimized electrical characteristics, reducing impedance mismatching and operational interference while maintaining enhanced device functionality through their coordinated interaction.
Data Source
AI summary
A mobile device and related power management method are disclosed. The power management method includes detecting a level of residual battery power, and selectively enabling the provision of power to the smart card and the RF chip in accordance with the detected level of residual battery power.