Model Description

In this example we model a video source using a birth-death process which feeds a limited queue. In this model, the source generates packets at a rate that depends on the state of the birth-death model. This source model results from the superposition of a number of ON-OFF sources. The video source has two exponential events: Enable_Source, that increases the number of active ON-OFF sources and Disable_Source that reduces the number of active ON_OFF sources. The other event (Packet Generation) occurs if the number of active sources is at least one.

The behavior of the Server_Queue object is very simple: the packet is stored in the queue, if there is space available in the buffer. The service time of the server has exponential distribution. Figure shows the model.

Figure: The Traffic Model.