摘要： 分析传统应用层组播模型的优点和不足，结合应用层主动网络技术，提出一种新的应用层组播模型。在网络边缘部署主动式超级节点、普通节点和主动式备用节点，在广域网中生成组播共享树，在局域网上构造多维Mesh，依靠组播共享树与多维Mesh进行组播。利用PeerSim对Scribe, CAN Multicast和该模型进行仿真，比较它们的Link Stress和RMD，结果表明该模型的优势随网络规模的变大而增加。

关键词: 组播模型, 应用层组播, 应用层主动网络

Abstract: Analyzing advantage and disadvantage of traditional application-level multicast model, this paper proposes a new application level multicast model based on Application Level Active Network(ALAN) technology. It introduces active super nodes, common nodes and active backup nodes into network edge. Multicasts depend on multicast-share tree that is built on WAN, and d-Mesh that is built on LAN. Simulation results with PeerSim show that this model has better performance on Link Stress and RMD compared with Scribe and CAN Multicast, and its advantage will increase with the increasing of network size.

Key words: multicast model, application level multicast, Application Level Active Network(ALAN)

中图分类号: 

• TP393.07