RFID Communication Device Partial Block Backup
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Solution Overview
Problem
RFID tags with nonvolatile memory face data loss during partial block writing due to communication interruptions, as existing backup methods require hardware changes and are costly.
Innovation Solution
A communication device that specifies blocks with data outside the writing range, backs up original data, stores it, and writes update data after initialization, with error notification and power management to distinguish between communication and power failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is written into nonvolatile memory with block-level erasure, then writing efficiency is improved, but data loss risk increases during communication interruption
Solution Approach 1:
The communication device reads and backs up original data from the target block before initiating the write operation. This preliminary action ensures that if communication interruption occurs during writing, the original data can be restored, thus preventing data loss while maintaining block-level writing efficiency.
2Reliability
If backup methods are implemented to prevent data loss, then data integrity is improved, but system complexity and cost increase
Solution Approach 1:
The communication device creates a copy of the original data in its own memory before writing to the RF tag. This copying mechanism provides backup functionality without requiring hardware changes to the RF tag or system environment, thus maintaining simplicity while improving data integrity.
Solution Approach 2:
The communication device acts as an intermediary that handles the backup operation. Instead of requiring the RF tag to have built-in backup capabilities or complex system modifications, the communication device temporarily stores the original data and manages the restore process, simplifying the overall system architecture.
3Reliability
If complete block backup is performed, then data safety is improved, but writing time increases
Solution Approach 1:
The communication device performs backup only on the specific block that requires writing, rather than backing up entire memory spaces. This partial backup approach reads only the necessary original data from the target block, minimizing the time required while still providing adequate data safety.
Data Source
AI summary
A communication device (3) performs contactless communication with an RF tag (8) that is provided with a nonvolatile memory (82) having a plurality of blocks serving as units of data erasure. The communication device (3) includes a specifying unit (303) that specifies, from among blocks to which a writing range belongs, a divided block that includes data outside the writing range when data is written into the nonvolatile memory, a backup processing unit (304) that backs up original data of the specified divided block, a storage unit (36) that stores backup data that includes the original data, and a writing processing unit (305) that writes the update data into the divided block that was initialized when the backup data is stored.