Approches alternatives pour la différenciation de services IP

Abstract

This article studies the problem of service differentiation in IP networks. The limits of the standard models are analysed and alternative solutions like the proportional differentiation and the non-elevated services are presented. These services are simpler to set up but need adaptation layers to insure correct end-to-end performances. To illustrate these approaches the EDS model from the INRIA/RESO team and the QBSS-LBE model of the internet2 project are explored and their properties studied practically. This study highlights the benefit of a global approach of Quality of Service in internet and open many perspectives of research on the transport layer.