基于DiffServ的分层组播拥塞控制机制  

Layered Multicast Congestion Control Mechanism Based on DiffServ

作　　者：杨云[1,2] 周坚[1] 陆璐[1] 陶笔蕾[1] 刘军[1] 刘凤玉[2] 

机构地区：[1]扬州大学信息工程学院计算机科学与工程系,江苏扬州225009 [2]南京理工大学计算机应用博士后流动站,江苏南京210004

出　　处：《小型微型计算机系统》2010年第3期485-489,共5页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(602730350)资助;国防科工委应用基础基金项目(K1704060511)资助;江苏省自然科学基金项目(BK2007074)资助

摘　　要：Internet多媒体业务的发展使得网络异构性问题更加突出,它对传统组播拥塞控制提出了新的要求,分层组播是适应网络异构性的一种有效方案.为了克服传统分层组播质量不稳定、控制复杂、组播树变动频繁等问题,提出了一种基于区分服务的分层组播拥塞控制机制LMCC.它在考虑预约带宽公平性的前提下进行分组标记和转发,适应了网络异构性.算法性能分析表明LMCC机制具有较快的拥塞响应速度、较好的稳定性、TCP友好性和较低的丢报率.Network heterogeneous problems is more outstanding with the development of multimedia applications in Internet,and it calls for new demand for traditional multicast congestion control,layered multicast is considered to be an efficient approach to cope with the network heterogeneity.To conquer the problems of quality instability,control complexity,and frequent changes of multicast tree in traditional layered multicast,a layered multicast congestion control mechanism base on DiffServ called LMCC is proposed.It marks and forwards the packets on the premise of the fairness reserving of bandwidth,so it adapts the heterogeneous network well.Simulation results show that LMCC characterizes with more responsive,more stable,better TCP-Friendliness and low loss rate.

关 键 词：区分服务 拥塞控制 分层组播 分组 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]