Performance Analysis of an ISDN Switch with Distributed Architecture: Circuit Switched Calls

We have developed an approximate analytic model and a detailed simulation model to study the performance of an ISDN switch with distributed architecture. The analytic model treats the switch as a network of single server and infinite server queues with non- preemptive priority service, general service times and batch arrivals. It approximates the internal arrival processes in the network by Poisson processes, eliminates queue feedback by batch arrivals, and assumes independence among the components of end-to-end delays. The simulation program is written in a distributed and modular way so as to simplify model development and debugging. Also extensive statistical techniques are employed for simulation output validation.