QoS evaluation of a voice over IP network with video: A case study

Author

De Cristofaro, Nick ; McGill, Geoff ; Sallahi, Afrim ; Davis, Matt ; Alsibai, Alla ; St-Hilaire, Marc

Author_Institution

Sch. of Inf. Technol., Carleton Univ., Ottawa, ON

fYear

2009

fDate

3-6 May 2009

Firstpage

288

Lastpage

292

Abstract

In this paper, we evaluate the effect of different queueing disciplines and different codecs on a voice over IP (VoIP) network with video (also known as video conference). A real network topology is implemented using Cisco equipment. Experimental results show that low latency queueing (LLQ) and AutoQoS can provide significant improvements over FIFO in terms of delay, jitter and reserved bandwidth for a VoIP call with video. As far as codecs are concerned, they are suitable for different scenarios. It´s for certain that G.729 helps when low bandwidth is a must but, without any QoS parameters in place, codecs do not make a good enough difference for acceptable call quality on a congested network.

Keywords

Internet telephony; quality of service; queueing theory; telecommunication network topology; teleconferencing; video communication; AutoQoS; Cisco equipment; QoS; VoIP; codecs; low latency queueing; network topology; queueing discipline; video conference; voice over IP network; Bandwidth; Codecs; Computer aided software engineering; Delay; Information technology; Internet telephony; Jitter; Network topology; Quality of service; Videoconference; Voice over IP (VoIP); case study; codecs; quality of service (QoS); queueing mechanisms; video conference;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2009. CCECE '09. Canadian Conference on

Conference_Location

St. John´s, NL

ISSN

0840-7789

Print_ISBN

978-1-4244-3509-8

Electronic_ISBN

0840-7789

Type

conf

DOI

10.1109/CCECE.2009.5090139

Filename

5090139