Self-Correcting Memory Authentication Error Correction
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Solution Overview
Problem
Conventional error correction methods for integrated circuit memory systems generate overhead in memory storage and are inefficient in identifying and correcting errors, particularly in scenarios where data corruption can lead to multiple uncorrectable errors.
Innovation Solution
The system employs memory authentication functionality to identify and verify possible corrections, utilizing existing authentication mechanisms to apply error corrections without additional overhead, by comparing content to a standard and replacing erroneous words with possibly correct ones if authenticated successfully.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional error correction methods (e.g., ECC) are used, then error correction capability is provided, but memory overhead is generated requiring additional storage bits
Solution Approach 1:
The patent applies multi-functionality by using authentication data (typically used for security verification) to serve dual purposes: both authentication and error correction. The authentication tag is reused as error detection and correction information, eliminating the need for separate ECC overhead while maintaining both security and reliability functions.
Solution Approach 2:
The patent changes the parameter usage of authentication data by interpreting authentication failure not just as security violation but also as potential error indicator. By modifying how authentication results are processed, the system extracts error correction information from existing authentication mechanisms without additional overhead.
2Reliability
If data scrubbing is performed periodically to detect and correct errors, then data integrity is improved, but time overhead and system complexity increase
Solution Approach 1:
The patent implements continuous error protection by integrating error correction capability into the normal read operation flow. Instead of periodic scrubbing, every memory access inherently provides error detection and correction opportunities through authentication verification, making the protection continuous rather than intermittent.
Solution Approach 2:
The system performs self-service error correction by automatically detecting and correcting errors during normal operations without requiring external intervention or separate scrubbing processes. The authentication mechanism serves the dual purpose of security verification and error correction, enabling the system to self-heal errors autonomously.
3Measurement precision
If multiple possible corrections are applied to erroneous words, then error correction accuracy is improved, but authentication overhead and processing time increase
Solution Approach 1:
The patent applies partial action by testing only the necessary number of correction possibilities (typically one or two bit flips) rather than exhaustively testing all possible corrections. This selective approach achieves sufficient correction accuracy for typical single-bit errors while avoiding excessive processing overhead from testing all combinations.
Solution Approach 2:
The system performs preliminary error detection through authentication before attempting corrections. By pre-identifying erroneous words through authentication failure, the system narrows down correction targets to only those words that actually need correction, avoiding unnecessary processing of correct words and improving overall efficiency.
Data Source
AI summary
A self-correcting memory system comprising an integrated circuit including memory and memory content authentication functionality, which is operative to compare content to be authenticated to a standard and to output “authentic” if the content to be authenticated equals the standard and “non-authentic” otherwise; and error correction functionality which is operative to apply at least one possible correction to at least one erroneous word entity in said memory, yielding a possibly correct word entity, call said authentication for application to the possibly correct word entity, and if the authentication's output is “authentic”, to replace said erroneous word entity in said memory, with said possibly correct word entity thereby to yield error correction at a level of confidence derived from the level of confidence associated with the authentication.