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Chapter 21 ■ References 637
21.8. Suggest a possible process architecture for this system.
21.9. If a periodic process in the on-board train protection system is used to collect data from the
trackside transmitter, how often must it be scheduled to ensure that the system is guaranteed
to collect information from the transmitter? Explain how you arrived at your answer.
21.10. With the help of examples, define what a real-time operating system is. Explain how it is
different from a conventional operating system. What are the components included in real-time
operating systems and what are their responsibilities?
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