MATLAB SIMEVENTS RELEASE NOTES User's Guide download pdf (Page 109)

Model a Packet Switch

5-19

The queue uses a FIFO queuing discipline, which does not take into account the

destination of each packet. Note that such a model can suffer from “head-of-queue

blocking,” which occurs when a packet not at the head of the queue is forced to wait even

when its destination is available, just because the packet at the head of the queue is

aiming for an unavailable destination.

Rout Packets to Their Destinations

A core block in the packet switch example is the Output Switch block. This block sorts

arriving entities so that they depart at the appropriate entity output port based on the

entities' Destination attribute.

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MATLAB SIMEVENTS RELEASE NOTES User's Guide Page 109