Carrierless Signal NFC Device Detection Power Management
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Solution Overview
Problem
Existing near field communication systems face challenges in power consumption, particularly for battery-powered devices acting as masters, and compatibility issues between different NFC protocols, making it impractical for multiple devices to communicate effectively without manual assignment of master roles and potential protocol mismatches.
Innovation Solution
The use of carrierless signals, such as Pulse Pings and Load Pings, for data transmission and communication between devices at close proximity, allowing for reduced power consumption and protocol-independent communication, enabling devices to automatically detect and communicate with each other without the need for continuous carrier modulation and manual user input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a battery-powered device acts as master and continuously broadcasts beacon signals, then device detection and communication initiation is enabled, but power consumption becomes unacceptable
Solution Approach 1:
The patent inverts the traditional master-slave role assignment by making the slave device (battery-powered mobile device) the active initiator that broadcasts wake-up signals, while the master device (fixed terminal) becomes the passive responder. This inversion allows the battery-powered device to use low-power periodic broadcasting instead of continuous high-power transmission, solving the power consumption problem while maintaining automatic detection capability
Solution Approach 2:
The slave device implements periodic wake-up signal broadcasting at predetermined intervals rather than continuous transmission. This periodic action significantly reduces average power consumption while still enabling timely device detection and communication initiation when needed
2Use of energy by moving object
If manual master role assignment is required for mobile-to-mobile communication, then power consumption is reduced, but ease of operation deteriorates due to manual user input requirements
Solution Approach 1:
The system implements self-service through automatic role assignment based on device characteristics. When two mobile devices come into proximity, they automatically negotiate and assign master/slave roles based on their capabilities and states without requiring manual user input, thereby maintaining low power consumption while achieving automatic communication initiation
3Reliability
If master devices are assigned in multi-device environments, then communication coordination is achieved, but device complexity increases and adaptability decreases
Solution Approach 1:
The patent implements universal protocol support where all devices in the network can function as both master and slave depending on the communication context. Each device is equipped with multiple NFC protocol stacks (Felica, Mifare, NFCIP-1) and can dynamically switch roles and protocols based on the partner device's capabilities, eliminating the need for fixed master assignments and improving both adaptability and protocol compatibility
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 and eliminates the need for manual master role assignment, enabling efficient and compatible communication between devices of varying types, facilitating automatic detection and data exchange with low power consumption and high security.
Implementation Method 1
close proximity near field communication systems which use the magnetic near field for communication
Implementation Method 2
a receiving element for receiving a second effectively carrierless signal from the second device
Data Source
AI summary
A method for effecting a near field communication, including the steps of positioning a first device at a close proximity to a second device, wherein the close proximity is suitable for the near field communication; and sending a first effectively carrierless signal from the first device to the second device.