中文摘要：

针对应用层组播中构建组播树的三种不同算法对组播树性能影响进行了研究，包括各节点的吞吐量和组播树的稳定性，在Planet Lab分布式实验床上进行了实际的测量和分析。结果表明最大带宽组播树算法构建的组播树有最好的吞吐量和稳定性；最短路径树算法也有很高的稳定性，其吞吐量比随机组播树算法有所提高，但差于最大带宽组播树算法。

英文摘要：

This paper is focused on the influence to the throughput of the nodes and the stability of the multieast tree by three different algorithm of building the muhieast tree, The measurement is done on 30 nodes of PlanetLab testbed all over the world, According to the analysis result, it found that Max-bandwidth Multieast Tree Algorithm has best throughput and stability, the Shortest-path Multicast Tree Algorithm also has high stability, its throughput is better than Random Muhicast Tree Algorithm, but worse than Max-bandwidth Multieast Tree Algorithm.