Design of Dependent-Failure-Tolerant Microcumputer System Using Triple-Modular Redundancy

Michitaka Kameyama, Tatsuo Higuchi

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Microcomputer system reliability using triple-modularredundancy (TMR) is discussed when failures exist not only in any single module but also in any two or three modules at a time. The optimal time interval is calculated by which the system will even be resynchronized periodically so that additional transient failures can be tolerated. It is shown that in spite of the optimal resynchronization, thereliability of the system cannot be improved by the ordinary TMR under some dependent-failures. For the purpose of eliminating the effect of dependent-failures, a new fault-tolerant microcomputer system is proposed where a program is executed three times by three CPU's.

Original languageEnglish
Pages (from-to)202-206
Number of pages5
JournalIEEE Transactions on Computers
Issue number2
Publication statusPublished - 1980 Feb
Externally publishedYes

ASJC Scopus subject areas

  • Software
  • Theoretical Computer Science
  • Hardware and Architecture
  • Computational Theory and Mathematics


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