Enhancing the coexistence of unicast and multicast sessions in Diffserv architecture

Abstract

One non-trivial research challenge is the task to integrate two different but complementary technologies like multicasting and Diffserv architecture. In this paper, we propose a simple way to fairly share the bandwidth among multicast flows inside each Diffserv class. To this end, we extend the Diffserv architecture by re-marking multicast packets in core routers. The remarking procedure allows different priority to multicast flows according to the number of receivers downstream to each outgoing interface. We detail our approach considering architectural topics and we evaluate the performance of our proposals using ns-2 simulations. © Springer-Verlag Berlin Heidelberg 2003.