Simplex in a Hostile Communications Environment: The Coordinated Prototype
• SEI Report
Publisher
Software Engineering Institute
CMU/SEI Report Number
CMU/SEI-99-TR-016Topic or Tag
Abstract
Simplex is an engineering framework embodying fault tolerance and dynamic upgrade in a highly maintainable system. This report describes an approach to using Simplex to construct a COTS-based computer system capable of coordinated real-time motion control in a hostile communications environment. It also discusses how selected portions of the Coordinated Prototype tolerate software faults and allow new software to be deployed and tested during system operation.
Cite This SEI Report
Altman, N., Weinstock, C., Sha, L., & Seto, D. (1999, August 1). Simplex in a Hostile Communications Environment: The Coordinated Prototype. (SEI Report CMU/SEI-99-TR-016). Retrieved February 4, 2026, from https://www.sei.cmu.edu/library/simplex-in-a-hostile-communications-environment-the-coordinated-prototype/.
@techreport{altman_1999,
author={Altman, Neal and Weinstock, Charles and Sha, Lui and Seto, Danbing},
title={Simplex in a Hostile Communications Environment: The Coordinated Prototype},
month={{Aug},
year={{1999},
number={{CMU/SEI-99-TR-016},
howpublished={Carnegie Mellon University, Software Engineering Institute's Digital Library},
url={https://www.sei.cmu.edu/library/simplex-in-a-hostile-communications-environment-the-coordinated-prototype/},
note={Accessed: 2026-Feb-4}
}
Altman, Neal, Charles Weinstock, Lui Sha, and Danbing Seto. "Simplex in a Hostile Communications Environment: The Coordinated Prototype." (CMU/SEI-99-TR-016). Carnegie Mellon University, Software Engineering Institute's Digital Library. Software Engineering Institute, August 1, 1999. https://www.sei.cmu.edu/library/simplex-in-a-hostile-communications-environment-the-coordinated-prototype/.
N. Altman, C. Weinstock, L. Sha, and D. Seto, "Simplex in a Hostile Communications Environment: The Coordinated Prototype," Carnegie Mellon University, Software Engineering Institute's Digital Library. Software Engineering Institute, SEI Report CMU/SEI-99-TR-016, 1-Aug-1999 [Online]. Available: https://www.sei.cmu.edu/library/simplex-in-a-hostile-communications-environment-the-coordinated-prototype/. [Accessed: 4-Feb-2026].
Altman, Neal, Charles Weinstock, Lui Sha, and Danbing Seto. "Simplex in a Hostile Communications Environment: The Coordinated Prototype." (SEI Report CMU/SEI-99-TR-016). Carnegie Mellon University, Software Engineering Institute's Digital Library, Software Engineering Institute, 1 Aug. 1999. https://www.sei.cmu.edu/library/simplex-in-a-hostile-communications-environment-the-coordinated-prototype/. Accessed 4 Feb. 2026.
Altman, Neal; Weinstock, Charles; Sha, Lui; & Seto, Danbing. Simplex in a Hostile Communications Environment: The Coordinated Prototype. CMU/SEI-99-TR-016. Software Engineering Institute. 1999. https://www.sei.cmu.edu/library/simplex-in-a-hostile-communications-environment-the-coordinated-prototype/