Analytical model of 3-level QoS scheduling in hybrid optical networks

This paper describes an analytical model for a 3-level quality of service scheduling in hybrid optical networks. Three service profiles with different requirements are considered, namely: guaranteed transparent service, where packets are transparently forwarded into pre-established paths; real-time statistically multiplexed packet service, where real-time packets are forwarded with limited delay; best-effort packet service, which is a typical best-effort service like IP traffic in the Internet. The model captures the loss of real-time and throughput of best-effort packet traffic, in asynchronous context, when considering best-effort traffic saturating the channels of a link. The accuracy of the model is evaluated by validating it against simulation, proving how the model provides excellent results and captures very well the behavior of both classes of traffic.