NFC Tag Pairing via Portable Intermediary for Home Automation
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Solution Overview
Problem
Existing NFC-based home automation systems face limitations in range and user access control, as NFC tags are passive and have restricted effective ranges, and there is a need for efficient management and control of multiple devices within a home automation network.
Innovation Solution
A system that integrates NFC-enabled portable devices with a home automation network, allowing users to read NFC tags for device information and control parameters, enabling remote access and control of appliances through a mesh network protocol, with a controller managing device interactions and permissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If NFC tags are used for device pairing and control, then device identification and basic control parameters can be accessed, but the effective range is limited to approximately ten centimeters
Solution Approach 1:
The patent introduces a portable device as an intermediary between the NFC tag and the user. The portable device reads information from the NFC tag within close proximity (solving the range limitation) and then wirelessly transmits this information to the user's smartphone or other remote devices, effectively extending the interaction range while maintaining accurate device identification through the NFC reading process
2Reliability
If NFC readers are integrated into portable devices for close-range communication, then secure short-distance data exchange is achieved, but user access control and management of multiple devices becomes complex
Solution Approach 1:
The patent implements a universal control system where a single portable device can manage multiple electrical devices through a standardized interface. The system provides unified permission management, device discovery, and control capabilities across different device types, reducing management complexity while maintaining secure NFC-based communication for authentication and data exchange
3Loss of information
If passive NFC tags are used in electrical devices, then device information can be stored and read, but the tags cannot actively transmit information beyond the limited NFC range
Solution Approach 1:
The portable device serves as an active intermediary that reads information from the passive NFC tag when in close proximity, then actively transmits this information wirelessly to the user's remote device. This two-stage process preserves the simplicity and information storage capability of passive NFC tags while extending the effective transmission range through the portable device's wireless communication capabilities
Data Source
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AI summary
A method and device are disclosed that may include collecting information from a radio frequency readable tag of a first electrical device using a radio frequency tag reader in a portable device. A control application may be launched on the portable device in response to the collected information. A graphical user interface may be presented on the portable device display. Control parameters may be set for the first electrical device in response to inputs to the graphical user interface.