On the Construction of New-Generation On-Board Real-Time Systems
Integrated Computer-Aided Engineering
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An increasing proportion of the critical control activities performed on board of modern satellite systems is nowadays being implemented in software. The resulting software systems have thus to accommodate a large spectrum of processing requirements, which shows an increasing demand for event-driven activities. Hence, process-oriented preemptive priority-based scheduling is most suited for use in such systems. This paper contends that the recent advances in the domain of hard real-time make Ada tasking particularly apt for it. This paper shows that, although a variety of reasons exist to date for not using any of the Ada tasking in critical applications, most of such reasons may be defeated by educated design and efficient implementations.