Abstract

The nonblocking packet switch to be considered has N inputs and N outputs and operates L times as fast as the input and output trunks. Karol et al. has analyzed special cases of L ?? 1, N . This paper analyzes the effect of speedup ( L ) on packet loss probability and average transmission delay in the case of an arbitrary number of L such that 1 ?> L ?> N in two types of nonblocking packet switch. One has buffers only at outputs. The other has buffers at inputs as well as at outputs. The maximum thoughput is obtained on the assumption of an infinite number of buffers in the latter type; that is 0.8845 and 0.9755 when L = 2 and L = 3, respectively. Some simulation results are also provided in the case where a finite number of buffers are given at each input.

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