RFID Tag Silent State and Restore Mechanism
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Solution Overview
Problem
Current RFID systems lack efficient mechanisms for managing the state of RFID tags during purchase and return processes, particularly in retail settings, leading to inconvenience and inefficiencies in tracking and reusing tags.
Innovation Solution
The implementation of a silent RFID state and restore back mechanism, where RFID tags can be put into a silent state during purchase and restored to a standard state for returns, using a sleep command and awake command with a silent key for authentication, allowing secure and efficient tracking and reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID tags are permanently disabled after purchase using kill command, then anti-theft security is improved, but tag reuse capability is lost and inventory management becomes less efficient
Solution Approach 1:
The patent changes the RFID tag's operational state by introducing a silent mode that temporarily disables tag response without permanent destruction. The tag can be activated or deactivated through specific commands (AWAKE, SLEEP) while maintaining its fundamental identity and data, allowing flexible control between security and reuse needs.
Solution Approach 2:
The RFID tag system transitions from a static permanent kill state to a dynamic reversible state. The tag can switch between active, silent, and deactivated modes based on operational requirements, enabling adaptive control for different scenarios such as purchase, return, and inventory management.
2Productivity
If RFID tags remain active after purchase, then tag reuse for returns is enabled, but anti-theft detection fails to distinguish purchased from unpurchased items
Solution Approach 1:
The patent applies different operational states to different RFID tags based on their purchase status. Purchased tags enter silent mode (non-responsive) while unpurchased tags remain active, creating local differentiation in tag behavior that enables both reuse and anti-theft detection.
Solution Approach 2:
The silent mode acts as an intermediary state between fully active and permanently killed. This intermediate state allows tags to be temporarily non-responsive for security purposes while retaining their identity and data, enabling distinction between purchased and unpurchased items without permanent loss of functionality.
3Reliability
If RFID tags are permanently killed at checkout, then security is improved, but customer convenience for returns is reduced
Solution Approach 1:
The system performs preliminary state change to silent mode at purchase rather than permanent deletion. This preliminary action allows the tag to be temporarily deactivated for security while preserving the option for future activation during returns, enhancing customer convenience without compromising initial security.
4Object-generated harmful factors
If RFID tags are permanently disabled, then false alarms at exit are reduced, but system flexibility for error handling is lost
Solution Approach 1:
The RFID tag system implements dynamic state transitions that allow flexible response to different scenarios. Tags can be activated, deactivated, or placed in silent mode based on purchase status, enabling the system to adapt to errors, returns, and edge cases without generating false alarms or losing functionality.
Data Source
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AI summary
Silent radio frequency identifier (RFID) state and restore back is described herein. An RFID tag enters a silent state by receiving a sleep command from an RFID reader. While the RFID tag is in the silent state, only an awake command will restore back normal operation of the RFID tag. Other received commands or interrogations from the RFID reader are ignored and responses are not transmitted to the RFID reader.