【摘要】 主要从差错修复的角度,比较了两种可靠多播协议: SRM/Adaptive和TORM协议。在两种典型的网络拓扑下，分析和采用软件模拟的方法比较这两种协议随着节点数目和链路丢失率的变化对数据修复延迟和重复请求包数的影响;并实际实验了基于TORM协议开发的应用软件SameView。软件模拟结果说明SRM对于大规模的实时交互应用是很不适合的,它的数据修复延迟会变的很大,分布不稳定,并且重复数据请求也会很多。TORM在软件模拟和实际应用中都表现了较好的性能。由于具有很多特性,比如流量和拥塞控制、局部恢复等，因此TORM对于大规模的实时交互应用是比较适合的。更多还原

【Abstract】 Growing demand for multicast communication in network settings has focused attention on the performance of reliable multicast protocols.This paper compares the loss recovery performance of two reliable multicast protocols: SRM/Adaptive and the proposed protocol-TORM. Under the two representative topologies, mainly by using software simulation, the paper compares recovery latency and requests numbers of these two protocols. The varying parameters are topology,node number and link loss rate. It also tests SameView, the application based on TORM protocol, developed by the authors’ lab. Their findings confirm that SRM is unsuitable for large scale, real-time and interactive applications; and show that TORM is a better behaved reliable multicast protocol than SRM in the settings considered in the paper, many properties of it, including congestion control and traffic management, make it more suitable for these applications.更多还原