Attaining VoIP–Grade qos via deflection: a buffer space tradeoff study

Authors:
André Muezerie;Ioanis Nikolaidis;Pawel Gburzyński
Affiliations:
Physics Institute of São Carlos, University of São Paulo, São Carlos, SP, Brazil;Department of Computing Science, University of Alberta, Edmonton, Alberta, Canada;Department of Computing Science, University of Alberta, Edmonton, Alberta, Canada
Venue:
NETWORKING'05 Proceedings of the 4th IFIP-TC6 international conference on Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communication Systems
Year:
2005

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Abstract

We consider the issue of QoS (Quality of Service) in a network catering to isochronous VoIP (Voice over IP) sessions. Our simulation experiments strongly suggest that the single–path paradigm of implementing network–layer virtual circuits neither yields the best utilization of network resources (buffer space) nor is it able to provide the best end-to-end service in terms of loss rate and delay. Instead, it turns out that the dynamic exploration of alternative paths at the packet level with small buffer spaces at the routers results in a more efficient and economical delivery.