On the use of EKB routing strategy in PNNI networks

The PNNI protocol generally applied in ATM networks provides a powerful background to use smart traffic engineering methods. Aiming at increasing the probability of successful call setup as well as restoration after failure more paths can be precalculated and stored for each destination in switches. In our previous work a novel route calculation strategy called EKB was introduced, based on the algorithm of Edmonds and Karp, which addresses the reduction of restoration time in case of failure. The behavior of EKB was examined for failure situations focusing on permanent connections. In this study we extend the analysis of EKB by applying dynamic simulation scenarios where, beside permanent connections, switched connections are also considered. Thus, a reliable picture can be obtained about the performance of the novel algorithm EKB for normal operation.