Evolving dependable real-time systems
Lui Sha; Rajkumar, R.; Gagliardi, M.
Aerospace Applications Conference, 1996. Proceedings., 1996 IEEE
Volume 1, Issue , 3-10 Feb 1996 Page(s):335 - 346 vol.1
Digital Object Identifier 10.1109/AERO.1996.495894
Summary:To keep systems affordable, there is a trend towards using open
standard and commercial off the shelf (COTS) components in the
development of dependable real-time systems. However, the use of COTS
also introduces the vendor-driven upgrade problem that is relatively new
to the dependable real-time computing community. If we refuse to accept
the “new and improved” hardware and software components
provided by vendors, then the hope that using COTS components will help
keep the system modern via market forces will be dashed. If we decide to
keep our systems modern, then we have to develop approaches that can
introduce new hardware and software components into deployed systems
safely, reliably and easily, in spite of the inevitable bugs in some of
the new COTS components. In this paper, we give an informal review of
the Simplex Architecture, which has been developed to support safe and
reliable online upgrade of dependable computing systems. This paper is a
revision of the SEI technical report: A Software Architecture for
Dependable and Evolvable Industrial Computing Systems. CMU/SEI-95-TR-005
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