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Replicate Entities on Multiple Paths

Sample Use Cases

The Replicate block enables you to distribute copies of an entity on multiple entity paths. Replicating entities might be a requirement of the situation you are modeling. For example, copies of messages in a multicasting communication system can advance to multiple transmitters or multiple recipients.

Similarly, copies of computer jobs can advance to multiple computers in a cluster so that the jobs can be processed in parallel on different platforms.

In some cases, replicating entities is a convenient modeling construct. For example, the MAC Controller subsystems in the Communication Protocol Modeling in an Ethernet LANCommunication Protocol Modeling in an Ethernet LAN example send one copy of an entity for processing and retain another copy of the same entity for the purpose of observing the state of the channel.

Modeling Notes

  • Unlike the Output Switch block, the Replicate block has departures at all of its entity output ports that are not blocked, not just a single selected entity output port.

  • If your model routes the replicates such that they use a common entity path, then be aware that blockages can occur during the replication process. For example, connecting all ports of a Replicate block, Path Combiner block, and Single Server block in that sequence can create a blockage because the server can accommodate at most one of the replicates at a time. The blockage causes fewer than the maximum number of replicates to depart from the block.

  • Each time the Replicate block replicates an entity, the copies depart in a sequence whose start is determined by the Departure port precedence parameter. Although all copies depart at the same time instant, the sequence might be significant in some modeling situations. For details, see the reference page for the Replicate block.

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