空间相关丢包条件下基本可靠组播传输协议研究

针对目前可靠组播传输协议研究中存在的两个问题，即缺乏统一的数学模型和对空间相关丢包条件下协议性能的分析，归纳构建了两类基本的可靠组播传输协议-基于确认和基于否定确认的可靠组播协议，利用数学方法在具有空间相关丢包特性的关系模型上分析了这两类协议模型，目的在于从数学的角度定性地分析这两种协议在网络带宽和可扩展性方面各自的性能特点，性能分析结果表明基于否定确认且采用否定确认抑制策略的可靠组播传输协议成功传输组播数据包时所需要的带宽较小，并具有良好的可扩展性。

Research on the basic reliable multicast transport protocol in spatially correlated packet loss

This paper mainly aims at the two problems in reliable multicast transport, lack of identical mathematical model and analysis in the circumstance of Spatially Correlated Loss. Two types of basic reliable multicast transport protocol (ACK and NAK based ) are presented. An analysis is made in the circumstance of Spatially Correlated Loss in order to exhibit their characters in scalability and bandwidth usage. The result shows that the reliable multicast transport protocol based on NAK with the NAK suppression scheme requires a smaller bandwidth and exhibits perfect scalability.