ECC Error Injection with Binomial Bit Distribution Testing
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Solution Overview
Problem
Nonvolatile memory systems often experience bit errors, leading to poor performance and potential system failures due to ineffective error correction code decoders.
Innovation Solution
The development of error injected error correction code (ECC) word generators that emulate realistic bit errors, allowing for accurate and controlled testing of ECC decoders and error reporting hardware, thereby enhancing their performance and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional error correction code decoders are used without realistic error injection, then device complexity is reduced, but measurement precision and reliability of performance evaluation deteriorate
Solution Approach 1:
The error injector is configured to inject bit errors into ECC code words before they are processed by the ECC decoder. This preliminary action of error injection allows the system to simulate realistic error conditions and evaluate decoder performance under controlled test scenarios, thereby improving measurement precision without requiring complex real-world failure simulations
Solution Approach 2:
The error injector serves as an intermediary component between the test data source and the ECC decoder. It introduces controlled bit errors into the test data stream, enabling accurate performance evaluation of the decoder while maintaining a relatively simple overall system architecture. The intermediary error injector bridges the gap between ideal test conditions and realistic error scenarios
2Reliability
If ECC decoders are tested with unrealistic error patterns, then ease of operation is improved, but reliability of error correction capabilities deteriorates
Solution Approach 1:
The error injector allows dynamic control of error injection parameters such as bit error rate, error patterns, and error distribution. By adjusting these parameters to match realistic error conditions observed in actual nonvolatile memory systems, the system achieves reliable evaluation of error correction capabilities while maintaining operational simplicity through parameterized control rather than complex physical error induction
3Measurement precision
If comprehensive error scenarios are simulated in real nonvolatile memory, then measurement precision improves, but loss of time and productivity increase
Solution Approach 1:
Instead of testing with actual nonvolatile memory devices that may have real errors, the system uses an error injector to create copies of ECC code words with artificially injected errors. This copying approach allows comprehensive error scenario simulation without the time penalties of physical memory testing, as the error injection process is much faster than reading from and analyzing real memory devices
Solution Approach 2:
The system replaces the mechanical/physical process of reading from real nonvolatile memory devices with an electronic error injection mechanism. This substitution eliminates the time-consuming aspects of physical memory access while maintaining measurement precision through controlled error injection into ECC code words, thereby reducing testing time without sacrificing evaluation accuracy
Data Source
AI summary
An error injected error correction code (ECC) word generator generates a set of ECC code words injected with bit errors for being read by an ECC decoder and error reporting hardware. The set of the error injected ECC words has a binomial distribution with regard to a number of the bit errors in a given ECC word of the set. The set of error injected ECC words has a predetermined average ratio of bit errors.