Recent advances of physical communication media allow data transmissions at very high transmission capacity and low error rates. Concurrent to this evolution, an increase interest in real-time and multimedia applications can be seen in science, medicine, manufacturing, as well as entertainment. The design, planning and construction of these new communication structures can be supported in an effective manner by their simulation. The class library OSSCAR is being developed at the university of Erlangen-Nurnberg for performance evaluation of slotted high speed networks as ATM, DQDB and CRMA. This paper concerns with the main features of OSSCAR and its underlying modeling technique.
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