Input and output queueing packet switch with backpressure mode and queue loss mode for two classes

Proposes an N×N input and output queueing packet switch model with both backpressure and queue loss operation mode, where backpressure mode is used for immediate calls and queue loss mode is used for waiting calls. The authors consider a synchronous system with Bernoulli arrivals, and analyze the average system delay and evaluate the loss probability of each class by computer simulation. As the results, they show that this model is useful to decrease the queueing delay of immediate calls and loss probability of waiting calls