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| Telecom Environment |
After the simulation paths and attributes are identified and the traffic generators are in place, you can start running the simulation; that is, you can begin generating simulated traffic on your model network. There are two ways to do this.
button on the command panel.
[Note: You can also start each traffic generator individually using a push button on its control dialog box, but this approach is a bit cumbersome when you want to start multiple traffic generators.]
When you start the simulation using either the command button or the control panel, all traffic generators are started simultaneously. When started, a traffic generator first calculates a holding time and selects a destination (as defined in the path selection process). It then finds the shortest path to that destination from its list of paths and tries to determine if the path is available for traversal. If the path is available, it seizes the path (decrementing the capacity attribute for each simple equipment model in the path) and holds the path for the calculated holding time. The attribute values (for the attributes selected in the Attributes palette) are calculated for the path traversal, and they are placed in their corresponding attribute buffers. After the holding time expires on the simulation clock, the path is released and the traffic generator calculates how long it must wait until it attempts its next call.
If the initial path is not available for traversal, the traffic generator checks the next shortest path for availability and continues this process until either it finds an available path or there are no paths left to try. If it does not find a path to seize, the traffic generator increments the Blocked Calls attribute for its associated model and waits until it is time to attempt another call.
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