Simulation modeling for the Contention-Collision Cancellation access mode in a multi-star LAN

Contention-collision cancellation (C-CC) access mode is an important access control mode in multi-star local area network (LAN). According to the multi-star LANpsilas working mechanism and design principle, C-CC access mode is classified six types of system model. Recent years, about these system models, many mathematical modeling researches were reported, but the simulation modeling research has not been presented so far. In this paper, the process of constructing the multi-star LAN and implementing type I model using by OPNet Modeler is discussed. Through simulation modeling, we get 3 main performance parameters: packet delay, the queue size of central node, and throughput. Finally, the relation between the throughput of central node and packet arrival of user terminal is obtained.