摘要
在虚拟课堂目前的开发中,广泛采用了分层组播技术解决多媒体数据的传输问题。分层组播技术是异构网络中传输多媒体实时数据的一个重要解决方案。文章分析了现有分层组播拥塞控制的优缺点,引入单次CLR分层组播机制,合理设置速率下降阈值和CLR选择条件。该算法简单易行,不会造成过多的网络反馈负担,能够保证虚拟课堂分层组播网络的稳定性。
The layered multicast technology is now widely used to solve the problem of multimedia data transmission in virtual classroom development. It is a significant solution for transmitting real-time multimedia data in heterogeneous network. We analyze the merits and shortcomings of existing layered multicast congestion control mechanisms, introduce the layered multicast mechanism of single CLR, and set rate falling threshold and CLR selection conditions reasonably. The algorithm is simple and practicable, does not cause excessive network feedback burden, and can ensure the stability of layered multicast network for virtual classroom.
出处
《计算机时代》
2011年第12期48-49,57,共3页
Computer Era
基金
扬州市职业大学科教研项目(11j01)
关键词
分层组播
单次CLR
异构网络
虚拟课堂
layered multicast
single CLR
heterogeneous network
virtual classroom
