TD2FQ: an integrated traffic scheduling and shaping scheme for DiffServ networks

The provision of quality of service (QoS) in terms of delay guarantee to real-time applications is a challenging issue in differentiated services (DiffServ) networks. There is a great demand to maintain individual flow´s traffic pattern when scheduling aggregated traffic. In this paper, we propose an integrated traffic scheduling and shaping scheme for DiffServ networks. The proposed scheme is called TD ²FQ (token-driven delay-sensitive dynamic fair queueing). There are two highlights in TD²FQ: a new scheduling mechanism-delay-sensitive dynamic fair queueing, and a new colored token approach. Besides the provision of guaranteed delay bound, TD²FQ can handle the aggregated traffic shaping and maintain the inter-flow fairness within each traffic class. Theoretical analysis and simulation experiments are also presented. Comparison results demonstrate the advantage of our approach