使用虚拟组播源的组播速率协调机制  

Mechanism of Multicast Rate Adjustment by Using Virtual Sender

作　　者：李素铎[1] 

机构地区：[1]西北民族大学数学与计算机科学学院,甘肃兰州730124

出　　处：《西北民族大学学报（自然科学版）》2010年第3期56-60,共5页Journal of Northwest Minzu University(Natural Science)

摘　　要：为了解决组播通信中接收者的异构性问题,目前主要有单速率组播和多速率组播两种方案.在单速率组播中,接收端的速率受瓶颈接收端(所有接收端中拥塞最严重的接收端)的限制;而多速率组播的缺点是协议过于复杂,难以实现细粒度的速率控制.在此基础上,提出一种利用中间接收者充当虚拟组播源的机制,将应用层组播与网络层组播相融合,从而灵活有效地解决了异构网络中组播的速率控制问题.In order to solve the problem of heterogeneous receivers in multicast network,there are mainly two schemes as single-rate multicast and multirate multicast.In single-rate multicast,the rate of receivers is restricted by receivers located after bottle-neck link（receivers whose congestion is the severest among all of receivers）;While multirate multicast is disadvantaged by its protocol＇s complexity and difficult to realize fine-granularity rate control.In allusion to these problems,this paper provides a mechanism let some intermediate nodes to be virtual senders of multicast.It unifies network layered multicast with application layered multicast,Thus effectively solve the problem of multicast rate control in heterogeneous network.

关 键 词：组播 组播拥塞控制 虚拟组播源 组播速率协调机制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]