A Comprehensive Survey of Redundancy Systems with a Focus on Triple Modular Redundancy (TMR)
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866912967179632640 |
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| author | Flad, Lukas Leyer, Mark Nitz, Felix Sebastian Krawutschke, Tobias |
| author_facet | Flad, Lukas Leyer, Mark Nitz, Felix Sebastian Krawutschke, Tobias |
| contents | Despite its maturity, the field of fault-tolerant redundancy suffers from significant terminological fragmentation, where functionally equivalent methods are frequently described under disparate names across academic and industrial domains. This survey addresses this ambiguity by providing a structured and comprehensive analysis of redundancy techniques, with a primary focus on Triple Modular Redundancy (TMR). A unified taxonomy is established to classify redundancy strategies into Spatial, Temporal, and Mixed categories, alongside the introduction of a novel five-class framework for voter architectures. Key findings synthesize practical tradeoffs, contrasting high-reliability spatial TMR for safety-critical applications against resource-efficient temporal methods for constrained systems. Furthermore, the shift toward Mixed and Adaptive TMR (e.g., Approximate Triple Modular Redundancy (ATMR), X-Rel) for dynamic and error-tolerant applications, such as Artificial Intelligence (AI) acceleration, is explored. This work identifies critical research gaps, including the threat of Multi-Bit Upsets (MBUs) in sub-28nm technologies, the scarcity of public-domain data on proprietary high-integrity systems, and the absence of high-level toolchains for dynamic reconfiguration. Finally, suggestions are offered for future research directions, emphasizing the need for terminological standardization, MBU-resilient design methodologies, and the development of open-source tools for adaptive fault tolerance. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_14411 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A Comprehensive Survey of Redundancy Systems with a Focus on Triple Modular Redundancy (TMR) Flad, Lukas Leyer, Mark Nitz, Felix Sebastian Krawutschke, Tobias Systems and Control B.8.1; C.4 Despite its maturity, the field of fault-tolerant redundancy suffers from significant terminological fragmentation, where functionally equivalent methods are frequently described under disparate names across academic and industrial domains. This survey addresses this ambiguity by providing a structured and comprehensive analysis of redundancy techniques, with a primary focus on Triple Modular Redundancy (TMR). A unified taxonomy is established to classify redundancy strategies into Spatial, Temporal, and Mixed categories, alongside the introduction of a novel five-class framework for voter architectures. Key findings synthesize practical tradeoffs, contrasting high-reliability spatial TMR for safety-critical applications against resource-efficient temporal methods for constrained systems. Furthermore, the shift toward Mixed and Adaptive TMR (e.g., Approximate Triple Modular Redundancy (ATMR), X-Rel) for dynamic and error-tolerant applications, such as Artificial Intelligence (AI) acceleration, is explored. This work identifies critical research gaps, including the threat of Multi-Bit Upsets (MBUs) in sub-28nm technologies, the scarcity of public-domain data on proprietary high-integrity systems, and the absence of high-level toolchains for dynamic reconfiguration. Finally, suggestions are offered for future research directions, emphasizing the need for terminological standardization, MBU-resilient design methodologies, and the development of open-source tools for adaptive fault tolerance. |
| title | A Comprehensive Survey of Redundancy Systems with a Focus on Triple Modular Redundancy (TMR) |
| topic | Systems and Control B.8.1; C.4 |
| url | https://arxiv.org/abs/2603.14411 |