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An Overlay Architecture for High Quality VoIP Streams
 

Summary: An Overlay Architecture for High Quality
VoIP Streams
Yair Amir, Claudiu Danilov, Stuart Goose, David Hedqvist, Andreas Terzis
Technical Report CNDS-2005-1 - October 2005
http://www.cnds.jhu.edu
Abstract-- The cost savings and novel features associated with
Voice over IP (VoIP) are driving its adoption by service providers.
Such a transition however can successfully happen only if the
quality and reliability offered is comparable to the existing
PSTN. Unfortunately, the Internet's best effort service model
provides no inherent quality of service guarantees. Because
low latency and jitter is the key requirement 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 routers of
an application-level overlay network and require no changes to

  

Source: Amir, Yair - Department of Computer Science, Johns Hopkins University

 

Collections: Computer Technologies and Information Sciences