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Simulation scenario

A simulation scenario is a part of simulation workspace, which defines all technical parameters of modeled links as well as some related modeling assumptions, such as physical (mutual) placement of transceivers, propagation modeling settings and so on. Within SEAMCAT a simulation scenario is based upon the notion of link. A link stands for a couple transmitter-receiver operating together in a given radiocommunication system.

A typical scenario consists of:

• One victim link which describes the communication system being interfered,
• At least one interfering link which describes the interfering system(s) that may cause interference to the victim link.

Note: CDMA systems are modeled differently, using special algorithm that creates a grid of multiple cells, see further info here.

Programming simulation scenario

When a new workspace is created (e.g. using menu option ?File/NewWorkspace??), all of its scenario elements are populated with some default values (representing some hypothetical interference case between two mobile systems at 900 MHz). Therefore after creating a new workspace the user should at first proceed with reviewing and modifying the scenario parameters so that the resulting simulation scenario would reflect the configuration of simulated radiocommunications systems.

Since the scenario fields would always contain some default elements, any process of "entering scenario" is, literally, a process of modifying the pre-programmed default one.

Several simple examples of how to program the simulation scenario are given here along with the associated SWS files.

The typical workflow of programming the scenario would be as follows:

1. Review and edit the victim link, by selecting the Victim Link command from the Workspace menu. This activates the Victim Link dialog window;
2. Review and edit the interfering links, by selecting the Interfering Links command in the Workspace menu. This activates the Interfering links list window where user may select a (default) link in the list and:
   • click on Edit button to modify the selected interfering link. This activates the Interfering Link window;
   • click on Add button to create a new interfering link;
   • click on Duplicate button to duplicate the selected interfering link. Reference of the duplicated link is derived from the reference of the selected one by incrementing the integer suffix of that reference if any or adding character to the end of it;
   • click on Delete to delete the selected interfering link.
3. In case a given link is a CDMA system, this should be indicated by checking the box "The system is a CDMA system" in the General tab of a given Victim/Interfering? ling dialog window. After checking the CDMA box, the link scenario tabs will change to activate CDMA link dialog;
4. Having reviewed the scenario, user may proceed to the actual simulation.

See further page on (exporting/importing) SEAMCAT scenarios.