NFC Context-Based Power Management for Mobile Devices
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Solution Overview
Problem
Mobile wireless communication devices face inefficiencies in power consumption due to the need to constantly maintain multiple wireless communication circuits active, leading to battery drain, especially in varying environments such as buildings and vehicles, where not all communication modes are necessary.
Innovation Solution
Incorporating near-field communication (NFC) sensors to switch the mobile device among different power consumption modes based on location, selectively powering respective wireless communication circuits and adjusting display illumination settings, thereby optimizing power usage based on context.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple wireless communication circuits are constantly kept active to ensure full functionality, then communication versatility is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the operational state of wireless communication circuits based on real-time context detection. The controller switches circuits between active and powered-off states according to the detected environment (indoor/outdoor, building/vehicle), making the system adaptable to varying communication needs while optimizing power consumption.
Solution Approach 2:
The mobile device autonomously manages its own power consumption by using its NFC circuit to detect context information and automatically controlling the power state of other wireless communication circuits. This self-service mechanism eliminates the need for manual user intervention to optimize power settings.
2Reliability
If all wireless communication circuits are kept powered on to maintain immediate connectivity, then communication reliability is improved, but battery life deteriorates
Solution Approach 1:
The system performs preliminary context detection using the NFC circuit before activating power-intensive wireless communication circuits. By detecting the environment in advance (indoor/outdoor, building/vehicle), the system prepares the appropriate communication mode, ensuring reliability is maintained only when necessary while extending battery life through proactive power management.
Solution Approach 2:
The controller changes the power state parameter of wireless communication circuits based on detected context. The system transitions circuits between different power modes (fully on, partially on, fully off) according to the operational environment, optimizing the balance between communication reliability and battery conservation.
3Use of energy by moving object
If the device adapts to different environments using context detection, then power efficiency is improved, but device complexity increases
Solution Approach 1:
The NFC circuit serves multiple functions: it acts as a standard near-field communication device for payments and information sharing, and simultaneously functions as a context detection sensor for power management. This multi-functionality approach enables environment-aware power optimization without adding dedicated hardware sensors, thereby limiting the increase in device complexity.
4Use of energy by moving object
If wireless communication circuits are selectively powered off to save energy, then power consumption is reduced, but adaptability to different communication environments deteriorates
Solution Approach 1:
The system uses feedback from NFC-based context detection to continuously adjust the power state of wireless communication circuits. The controller monitors the operational environment and dynamically switches circuits on or off based on real-time conditions, ensuring the device adapts to different communication environments while maintaining optimized power consumption.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach provides significant power savings by disabling unnecessary communication circuits and adjusting display settings automatically, enhancing battery life and user convenience by adapting to the device's environment.
Implementation Method 1
NFC technology is used for contactless short-range communications based on radio frequency identification (RFID) standards, using magnetic field induction to enable communication between electronic devices
Data Source
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AI summary
A communication system may include a plurality of near-field communication (NFC) sensors each associated with a respective location, and a mobile wireless communications device(s) switchable among a plurality of different power consumption modes. The mobile wireless communications device(s) may include a portable housing, an NFC circuit carried by the housing and configured to establish NFC communications with at least one of the NFC sensors when in proximity therewith, and a plurality of different wireless communications circuits carried by the housing. The mobile wireless communications device(s) may further include a controller carried by the housing and coupled to the NFC circuit and the different wireless communications circuits which may be configured to switch to a given power consumption mode based upon the at least one NFC sensor. In particular, some of the different power consumption modes may be associated with selectively powering respective ones of the wireless communications circuits.