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5 Designing Paths for Entities

5-20

This part of the example is similar to the model shown in “Use an Attribute to Select an

Output Port” on page 5-8.

Connect Multiple Queues to the Output Switch

The packet switch model must enable entities to advance from three queues to the single

entity input port of the Output Switch block. Candidate blocks are Input Switch and

Path Combiner. The Path Combiner block is more appropriate because it processes

entities as they arrive from any of the entity input ports, whereas the Input Switch block

would restrict arrivals to a specific selected entity input port.

Contention among packets can occur from:

• No blockage: Multiple packets from different sources with the same intended

destination arrive simultaneously at an empty queue and immediately attempt to

arrive at the path combiner.

Although the arrivals occur at the same simulation time value, the processing

sequence depends on:

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MATLAB SIMEVENTS RELEASE NOTES Guida Utente Pagina 110