N#Burst/D/1/K is widely used in the study of traffic control in ATM networks.In small buffer capacity region

a minus exponential function can characterize the curve of the loss probability changing with buffer size in this qUeueing model.So the curve can be obtained directly using the loss probability without buffer and that with one buffer

thus making it very simple to analyze the loss probability with small buffer capacity.Simulation shows that this approach is very accurate.