Abstract
In the beginning an overview of network/traffic control in ATM networks is presented, based on the fact that traffic control is distinguished in two levels, the Call-level and the Cell-level control, according to the distinction of ATM traffic in call and cell components, respectively. Afterwards, the paper concentrates on the Call-level and the impact of Virtual Path Bandwidth (VPB) control on ATM network performance. In particular the optimal VPB control is presented, minimizing the worst Call Blocking Probability of all Virtual Paths (VP) of the network. A VPB controller solves a large network optimization problem by a rigorous analytical procedure, while can assure network reliability. The procedure for optimal VPB allocation is clarified, step-by-step, in a tutorial application example. In a more realistic example, the optimal VPB control is applied on a model ATM network.
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