The case for interdomain dynamic QoS-based service negotiation in the internet

Abstract

The evolution of the Internet towards a global infrastructure for real time voice and video applications involves providing stringent Quality of Service (QoS) levels. Although some architectures, such as IntServ and DiffServ, have been defined and implemented, end-to-end QoS remains an unresolved problem. Recently, there has been a trend to deal with QoS at a higher-level layer, in the form of an overlay network. However, little attention has been given to the influence of the current domain interconnection structures in providing the right incentives and evolution paths towards QoS deployment. In this paper, we look at the Internet trying to identify the main problems and limitations of current interconnection models that impact QoS, as well as we suggest and evaluate evolution strategies for end-to-end QoS deployment. Particularly, we state the case for the interdomain dynamic QoS-based service negotiation in the Internet through an overlay network. This phase is needed before any end-to-end resource provisioning takes place. Three service negotiation models are presented and compared through simulation and analyses.