Enhanced Multi-rate Multicast for Optimal User Satisfaction and Efficient Bandwidth Utilization

In this paper, we present an enhanced algorithm for a multi-resolution multicast scheme. The enhancement aims at maintaining a perfect 100% satisfaction rate for all the nodes in the network by offering them their requested quality of service. In addition to the multi-resolution multicast, we use simple unicast to the unsatisfied nodes in order to provide the missing layers. The enhancement increases the satisfaction rate from 70% for multicast to the ideal target of 100%, while saving 50% in terms of traffic volume when compared to an all-unicast transmission. A trade-off is also shown between satisfaction rate and the increase in traffic volume.