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Service Di erentiation and Guarantees for TCP-based Elastic Trac

Summary: Service Di erentiation and Guarantees for TCP-based
Elastic Tra∆c
Nidhi Hegde and Konstantin E. Avrachenkov
INRIA, 2004 route des Lucioles, B.P.93
06902 Sophia Antipolis Cedex, France
fNidhi.Hegde, K.Avrachenkovg@sophia.inria.fr,
Abstract. We compare policies that o er di erentiated services to TCP tra∆c,
with the goal of providing some sort of performance guarantees to a premium
class of tra∆c. Speci cally, we study the e ectiveness of a scheduling policy com-
bined with various bu er management policies on the performance of compet-
ing TCP connections. In this work we consider a stochastic model for a class-
based weighted-fair-queueing scheduling policy where packets of di erent classes
are scheduled according to their pre-assigned static weight. We consider two bu er
management policies : complete partitioning, and complete sharing with pushout
at various thresholds. We consider two classes of TCP tra∆c in our model. Our
goal is to propose mechanisms with easily adjustable parameters to achieve service
di erentiation as required. In the numerical results we show how the scheduling
and bu er policies can be used to provide some sort of performance guarantee to
the higher class.
1 Introduction


Source: Avrachenkov, Konstantin - INRIA Sophia Antipolis


Collections: Computer Technologies and Information Sciences