본문
요약
This paper proposes a message transmission model for hard
real-time communications of periodic messages on a switched Ethernet
and also proposes an algorithm to schedule the messages to be transmitted
within their deadlines. The proposed scheduling algorithm is a
distributed one and is performed by the source and the destination nodes
without the modification of the operational features of the standard Ethernet
switch. When a new periodic message needs to be transmitted, it is
first checked whether it can be scheduled on both the transmission and
the reception links without affecting the already-schedlued messages, and
a feasible schedule is made for the new message if it is schedulable. The
proposed scheduling algorithm guarantees the transmission of periodic
messages within their deadline and allows flexible message transmission
on a hard real-time switched Ethernet.
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