This paper considers Gaussian flows multiplexed in a queueing network. A single node being a useful but often incomplete setting, we examine more advanced models. We focus on a (two-node) tandem queue, fed by a large number of Gaussian inputs. With service rates and buffer sizes at both nodes scaled appropriately, Schilder's sample-path large deviations theorem can be applied to calculate the asymptotics of the overflow probability of the second queue. More specifically, we derive a lower bound on the exponential decay rate of this overflow probability and present an explicit condition for the lower bound to match the exact decay rate. Examples show that this condition holds for a broad range of frequently-used Gaussian inputs. The last part of the paper concentrates on a model for a single node, equipped with a priority scheduling policy. We show that the analysis of the tandem queue directly carries over to this priority queueing system. iffalse {it Perhaps:} We conclude by presenting a number of motivated conjectures for the analysis of a queue operating under the generalized processor sharing discipline.

Gaussian processes (msc 60G15), Queueing theory (msc 60K25), Extreme value theory; extremal processes (msc 60G70), Performance evaluation; queueing; scheduling (msc 68M20), Communication networks (msc 90B18)
Logistics (theme 3), Energy (theme 4)
CWI. Probability, Networks and Algorithms [PNA]

Mandjes, M.R.H, & van Uitert, M.J.G. (2002). Sample-path large deviations for tandem and priority queues with Gaussian inputs. CWI. Probability, Networks and Algorithms [PNA]. CWI.