Design and Analysis of Scalable Source-Based Internet Multicast Routing Protocols

摘要

In this paper, we present a new Internet multicast routing architecture and protocol called Adaptive Source and CORe based multicasT (ASCORT). ASCORT is designed with the objective of flexibly balancing the scalalbility and end-to-end perofrmance. Unlike the core-based appraoch, all the distribution trees in ASCORT are source-specific. As a result, ASCORT has a better end-to-end performance than the core-based appraoch by being adaptive to the sources' location distributions. On the other hand, the tree nodes are not required to keep routing states for all the sources, thus resulting in a better scalability perforance than the soruce-specific approach. In this paper we will provide an overview of ASCORT's appraoch and two protocols to convert a forest of independent source-specific will provide an overview of ASCORT's approach and two protocols to convert a forest of independent cource-specific trees to a forest of ASCORT source-specific distribution trees. We will also present preliminary simulation results to compare ASCORT's performance with the core-based and source-specific approaches.