Impact of flow control on quality of service driven packet scheduling disciplines

In this paper we investigate the interaction between window based flow control and a recently proposed packet scheduling discipline designed for real-time services. The scheduling discipline, called the Dual Queue discipline, has been shown to provide greater flexibility than other scheduling disciplines such as fair queueing. However, its performance on non real-time services has not been previously investigated. We show that the Dual Queue's performance for non real-time services is again better than that of alternative approaches, which indicates that it will perform well in an environment of mixed real-time and non real-time traffic, such as the current internet.