NFC Device Low Power Polling Number Adjustment

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Solution Overview

Problem

NFC devices face high power consumption during polling operations due to the standard full power polling method, which is inefficient in detecting nearby devices and consuming significant energy.

Innovation Solution

Implementing a method with a non-fixed low power polling number, where the NFC device alternates between low power and full power polling, with the low power polling number being dynamically adjusted based on detection results and environmental factors, using a polling number generator to optimize power usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If full power polling is used to detect NFC devices, then detection reliability is improved, but power consumption increases

Engineering Contradiction:

Improvedetection reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic polling with alternating power levels. The NFC device performs multiple low power polls at regular intervals, then periodically switches to full power polling to ensure reliable detection. This periodic alternation between low and full power modes reduces overall power consumption while maintaining detection reliability through the full power polling phases.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent dynamically adjusts polling power levels based on detection results. The system transitions from static full power polling to dynamic adaptive polling where the power level changes based on whether NFC devices are detected. This dynamic adjustment allows the system to use minimal power during normal operation while ensuring reliable detection when needed.

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If low power polling is used to reduce energy consumption, then power efficiency is improved, but detection capability deteriorates

Engineering Contradiction:

Improvepower efficiencyVSAvoiddetection capability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The system periodically alternates between low power polls and full power polls. During most periods, low power polls are used to maintain power efficiency. At scheduled intervals or when specific conditions are met, full power polling is activated to ensure adequate detection capability, thus balancing power efficiency with detection reliability.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system uses feedback from detection results to adjust polling behavior. When low power polls fail to detect NFC devices after a certain number of attempts, the system triggers a full power poll to ensure detection capability. This feedback mechanism ensures that power efficiency is maintained while detection capability is preserved when necessary.

Inventive Principle:

Principle #23Feedback

3Device complexity

If a fixed polling number is used, then system simplicity is maintained, but adaptability to different environments deteriorates

Engineering Contradiction:

Improvesystem simplicityVSAvoidenvironmental adaptability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent implements a dynamic polling number that adjusts based on environmental conditions and detection results. Instead of a fixed polling number, the system modifies the number of low power polls performed between full power polls based on factors such as detection success rates and operational context. This dynamic adjustment enhances environmental adaptability while adding manageable complexity to the polling mechanism.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the polling parameter (number of polls) based on operational conditions. The polling number is adjusted as a variable parameter rather than a fixed constant, allowing the system to adapt to different environments such as high-traffic NFC areas versus low-traffic areas. This parameter change approach improves versatility while maintaining reasonable system complexity.

Inventive Principle:

Principle #35Parameter changes

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 reduces power consumption while maintaining reliable detection of NFC devices by adjusting the low power polling frequency based on detection success, ensuring efficient energy use and enhanced reliability in detecting NFC tags.

Implementation Method 1

NFC is a modern wireless communication technology implemented based on electromagnetic induction. By bringing two electronic devices within a small distance from each other, the electronic devices are able to establish communication with each other and perform data transmission.

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS9912567B2Method of handling NFC device with non-fixed low power polling number and NFC device using the same

Publication Date: 2018.03.06 XUESHAN TECH INC

AI summary

A method of handling a near field communications (NFC) device includes setting a low power polling number, wherein the low power polling number is non-fixed; detecting whether any NFC device is nearby; performing low power polls until either at least one NFC device is detected or the number of low power polls reaches the low power polling number; performing a full power polling; and adjusting the low power polling number after the full power polling.