NFC Gating by Kinetic Speed and Cell History
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Solution Overview
Problem
Mobile NFC initiator devices face limitations in continuously transmitting an RF field due to battery power constraints, making it inefficient to power and communicate with passive target devices, especially in varying mobility states.
Innovation Solution
Implementing a kinetic speed detection and cell visitation history-based mechanism to dynamically control the RF field activation and deactivation, optimizing the RF field duty cycle based on mobility states (pedestrian, vehicular, stationary) to maximize detection success and battery efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile initiator device continuously transmits an RF field to power passive target devices, then detection success of NFC devices is improved, but battery power is depleted faster
Solution Approach 1:
The patent implements periodic RF field transmission instead of continuous transmission. The system transmits RF fields at specific intervals determined by a duty cycle, which is dynamically adjusted based on mobility state. This periodic action maintains detection capability while significantly reducing power consumption compared to continuous transmission.
Solution Approach 2:
The patent dynamically adjusts the RF field duty cycle based on the detected mobility state of the device. When the device is stationary or moving slowly, a higher duty cycle is used to maximize detection success. When moving quickly, the duty cycle is reduced to conserve battery power. This dynamic adaptation resolves the contradiction by optimizing the balance between detection reliability and energy consumption according to real-time conditions.
2Use of energy by moving object
If the mobile initiator device activates RF field only when manually selected, then battery efficiency is improved, but automatic detection capability is lost
Solution Approach 1:
The patent enables the NFC system to automatically detect mobility state and adjust RF field activation without user intervention. The system self-monitors its motion through sensors and autonomously determines when to activate or deactivate the RF field based on the detected mobility state, eliminating the need for manual user selection while maintaining battery efficiency.
Solution Approach 2:
The system continuously monitors mobility state through sensors and uses this feedback to automatically control RF field activation. The feedback loop between mobility detection and RF field control enables automatic detection capability while maintaining optimal battery efficiency, as the system responds to changing conditions without requiring manual user input.
3Reliability
If the RF field duty cycle is increased to maximize detection success, then detection capability is improved, but power consumption increases
Solution Approach 1:
The patent changes the duty cycle parameter dynamically based on mobility state. Instead of using a fixed high duty cycle that would maximize detection but consume excessive power, the system adjusts this parameter according to real-time mobility conditions. This parameter adaptation allows the system to achieve sufficient detection capability while minimizing unnecessary 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 enhances the power efficiency and detection success of NFC communications by adaptively managing RF field activation, ensuring effective communication with passive devices while conserving battery life across different mobility states.
Implementation Method 1
a mobility state determined by a kinetic generator
Data Source
AI summary
Concepts and technologies are described herein for user equipment (“UE”) near-field communications (“NFC”) gating according to kinetic speed detection and cell visitation history. According to one aspect disclosed herein, a mobile initiator device, such as a UE that includes an NFC hardware component, can determine a mobility state of the mobile initiator device. The mobile initiator device can control, based upon the mobility state, activation of a radio frequency field that is used to activate a passive NFC device. In this manner, detection of the passive NFC device and battery efficiency can each be maximized when appropriate.