Title :
Time synchronization for VoIP quality of service
Author :
Melvin, Hugh ; Murphy, Liam
Author_Institution :
Univ. Coll. Dublin, Ireland
Abstract :
Various approaches seek to optimize the quality of service of VoIP applications. We propose a system that uses synchronized time to combine the useful characteristics of both fixed and adaptive buffer strategies, thereby improving VoIP quality of service. Using a combination of global positioning system (GPS) technologies and the network time protocol (NTP), hosts can learn the precise end-to-end delay for each packet. This information can benefit both domestic and business Internet telephony users. We outline our proposed system and discuss issues arising from the use of synchronized time
Keywords :
Global Positioning System; Internet telephony; protocols; quality of service; synchronisation; VoIP QoS; adaptive buffer strategies; business Internet telephony; domestic Internet telephony; end-to-end delays; fixed buffer strategies; global positioning system; network time protocol; synchronized time; time synchronization; time-sensitive voice data playout; Bandwidth; Codecs; Delay effects; IP networks; Internet telephony; Propagation delay; Quality of service; Streaming media; Transport protocols; Web and internet services;
Journal_Title :
Internet Computing, IEEE
DOI :
10.1109/MIC.2002.1003132
