Internet的可靠多媒体多播协议  

Reliable Multicast Protocol for Multimedia in Internet

作　　者：陈华[1] 王丽[1] 谢春娣[1] 

机构地区：[1]武汉科技学院数理系,湖北武汉430073

出　　处：《武汉科技学院学报》2004年第4期54-57,共4页Journal of Wuhan Institute of Science and Technology

基　　金：湖北省自然科学基金资助项目(项目编号:2004ABA014);湖北省教育厅重点科研项目(项目编号:2003A002);武汉科技学院基金资助项目(项目编号:20032418).

摘　　要：研讨多媒体多播应用中的允许延迟和分组丢失率问题,提出了一种基于转接节点概念的可靠多播协议(RMPRM)。RMPRM协议聚焦在允许延迟上提供多媒体服务质量保证,转接节点放置在多播树上,数据恢复在两个转接节点之间进行。RMPRM协议转接能满足重传需求和减少分组的复制数量。给出了RMPRM协议与不可靠多播协议的比较。仿真实验表明该协议具有较高的传输率和较低的端到端的传输延迟。研究表明RMPRM协议为多媒体多播传输提供了一种新的有效途径。This paper discusses the multimedia multicast application problem with allowable delay and high packet loss rate. It proposes a new reliable multicast protocol based on relay nodes concept (RMPRM). The RMPRM protocol focusing on allowable delay provides Quality of Service (QoS) for multimedia. Relay nodes are placed along the multicast tree. Data recovery is done between relay nodes. We propose the methods that enable protocol relays to request retransmission immediately and reduce the number of duplicate packets. We compare the RMPRM with non-reliable multicast protocols. Simulation results show that the RMPRM has high delivery ratio and low end-to-end delay for packet transmission. The results show that the RMPRM is an available approach to multimedia multicast.

关 键 词：多播路由协议 可靠多播 多媒体 NACK 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]