Asymptotic analysis of loss probability in a finite queue where one packet occupies as many places as its length

We consider a discrete-time single server queue which models the input buffer of an IP switch/router. The packets arrive according to a batch Bernoulli process and the packet lengths (service times) are independent and identically distributed with a general distribution. We assume that the system has a finite buffer of size K. In contrast to ordinary queues where one packet occupies one place in the buffer, we assume that one packet occupies as many places as its length. We study an asymptotic behavior of the loss probability for this queueing system as the buffer size K tends to infinity, and then use this result to approximate the exact loss probability. Numerical examples show that the approximation is very accurate.