A Priority-Based Hierarchical Application Layer Multicast Model

Application level multicast is attracting more and more attention. To deal with the fact that different end hosts in real network have different network interface bandwidth, most of the present researches cannot take both bandwidth and latency into consideration well and keep the system robust simultaneously. In this paper, a priority-based hierarchical application layer multicast model (PH-ALM) is proposed. At the foundation of maintaining the superiority of the hierarchical ALM scheme, Both the latency and available bandwidth of peers are taken into account, and the idea of building local ALM tree in cluster and using priority to build ALM tree is proposed in PHALM. Periodical position adjusting strategy is also adopted to optimize and maintain local ALM trees. The simulation demonstrates that PH-ALM can well adapt to large scale multicast with various network bandwidth of end hosts.