RFID IC Self-Check Identifier Integrity Verification
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Solution Overview
Problem
RFID tags face data integrity issues due to potential corruption of stored identifiers and check codes, which can lead to incorrect data transmission and system errors, especially in passive tags lacking a power source.
Innovation Solution
An RFID tag integrated circuit (IC) is designed to store an identifier and a check code, allowing it to self-check for data integrity by comparing the two and reconstructing the correct identifier if necessary, and can terminate operations or indicate errors if data corruption is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID tags store identifier data without verification mechanisms, then device complexity is reduced and manufacturing cost is lowered, but data integrity deteriorates and system reliability decreases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing check codes alongside identifier data in the RFID tag's memory during manufacturing. This advance preparation enables subsequent self-verification without adding operational complexity, as the verification mechanism simply compares stored data with pre-computed check codes rather than performing complex real-time calculations.
Solution Approach 2:
The patent uses copying by creating a redundant copy of verification information (check codes) that mirrors the identifier data. This copy serves as a reference for integrity verification, allowing the system to detect corruption without requiring complex algorithms or additional hardware beyond simple comparison logic.
2Use of energy by moving object
If passive RFID tags without power sources are used, then energy consumption is reduced and manufacturing cost is lowered, but data integrity deteriorates due to potential corruption without self-check capabilities
Solution Approach 1:
The patent implements self-service by enabling passive RFID tags to autonomously verify their own data integrity using stored check codes. The tag's processor independently compares identifier data with corresponding check codes and can detect corruption without external intervention, power sources, or additional verification infrastructure, maintaining reliability while keeping energy consumption minimal.
3Productivity
If data corruption is not detected in RFID tags, then system operation continues uninterrupted and productivity is maintained, but incorrect data transmission occurs and system errors increase
Solution Approach 1:
The patent applies feedback by implementing a closed-loop verification system where the RFID tag continuously checks its stored identifier data against check codes before transmission. When corruption is detected, the system provides feedback by terminating operation or indicating an error, preventing incorrect data transmission. This feedback mechanism ensures data transmission accuracy while maintaining productivity through automated error detection and appropriate response actions.
Data Source
AI summary
A Radio Frequency Identification (RFID) tag IC stores an identifier and a check code. The IC determines whether the stored identifier is corrupted by comparing it to the check code. If the stored identifier does not correspond to the check code then the IC may terminate operation or indicate an error. The IC may also reconstruct the correct identifier from the check code.