Maximum throughput of an input queueing packet switch with two priority classes

The maximum throughput of an N/spl times/N nonblocking packet switch with input queues and two priority classes is analyzed. Packets are of fixed length and the switch operation is slotted. Packets of both priority classes are queued when waiting for service. High-priority packets preempt low-priority ones and move ahead of all low-priority packets waiting in the queue. A new method of analysis is employed. The calculated results of the maximum throughput obtained are close to the simulation results. >