An overlay architecture for high-quality VoIP streams

被引:30
作者
Amir, Yair
Danilov, Claudiu [1 ]
Goose, Stuart
Hedqvist, David
Terzis, Andreas
机构
[1] Johns Hopkins Univ, Dept Comp Sci, Baltimore, MD 21218 USA
[2] Siemens Corp Res Inc, Princeton, NJ 08540 USA
关键词
overlay networks; VoIP;
D O I
10.1109/TMM.2006.884609
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
The cost savings and novel features associated with voice over IP (VoIP) are driving its adoption by service providers. Unfortunately, the Internet's best effort service model provides no quality of service guarantees. Because low latency and jitter are the key requirements for supporting high-quality interactive conversations, VoIP applications use UDP to transfer data, thereby subjecting themselves to quality degradations caused by packet loss and network failures. In this paper, we describe an architecture to improve the performance of such VoIP applications. Two protocols are used for localized packet loss recovery and rapid rerouting in the event of network failures. The protocols are deployed on the nodes of an application-level overlay network and require no changes to the underlying infrastructure. Experimental results indicate that the architecture and protocols can be combined to yield voice quality on par with the Public Switched Telephone Network.
引用
收藏
页码:1250 / 1262
页数:13
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