A Framework for QoS Provisioning in Differentiated Service Multicast Networks

A scalable QoS-aware multicast deployment in DiffServ networks has become an important area of research. Although multicasting and differentiated services are two complementary technologies, the integration of the two technologies is a non-trivial task due to architectural conflicts between them. A popular solution proposed is to extend the functionality of the DiffServ components to support multicasting. In this paper, we propose an algorithm to construct an efficient QoS-driven multicast tree, taking into account the available bandwidth per service class. We also present an efficient method to provide the limited available bandwidth for supporting heterogeneous users. The proposed mechanism is evaluated using simulated tests. The simulated results reveal that our algorithm can effectively minimize the bandwidth use and transmission cost.