AFIQ: An Accounting Framework for Inter-Domain QoS With Limited Trust

Applications sensitive to service quality, such as interactive video, could fuel the growth of the Internet if the network could support them. ISPs do provide QoS within VPNs, but endhosts connected to the public Internet and linked by paths that cross multiple ISPs can do little to influence the quality of the service for their traffic. While over-provisioning helped eliminate congestion in backbones, congestion is still present at the edges and it is not clear that if inter-domain QoS were feasible, major over-provisioning would remain the most cost-effective solution.