Fail-aware datagram service

In timed asynchronous distributed systems, it is often useful for a process p to know that another process q will not use a certain piece of information p has sent to q beyond a certain deadline. Since p learns about the occurrence of the deadline by simply measuring the passage of time on its own local clock, we call this kind of interprocess communication “communication by time”. Knowledge of computed upper bounds on one-way message transmission delays is a necessary prerequisite for this kind of communication.

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