On-off source

Five parameters must be specified in the Initialization attribute.

Figure: On-Off source.

• FLUID_CLASS - Indicates the class number that will receive the fluid traffic generated by the source in the subsequent queue server object. Typical values range between 1 and 3 in the presented examples.
• ONOFF_RATE - Indicates the transition rate from the ``on'' to the ``off'' state.
• OFFON_RATE - Indicates the transition rate from the ``off'' to the ``on'' state.
• FLUID_RATE - Indicates the rate of the volume of fluid that will be generated in the on state.
• PORT_OUT - Responsible for the connection between the source and the subsequent object. A string should be specified, and it must be the same as the port_in in the next object. Two identical names indicate the direct association of the objects.

IMPORTANT: Suppose that we have a model where an on-off source feeds a buffer. The initial on-off source state is ``on''. Although the buffer size has to be increased until the first change to the ``off'' state, this does not happen. The buffer size only increases after the first change to the ``on'' state. In this case, we can initialize the source with ``off'' and declare an event with high rate that changes the source state to ``on''.