By Topic

DiffServ QoS performance evaluation of multimedia telephony

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Ali, R.B. ; Departement de Genie Informatique, Ecole Polytech. de Montreal, Que., Canada ; Pierre, Samuel ; Lemieux, Y.

The Differentiated Services architecture (DiffServ) is a scalable and economic solution which provides relative QoS to different kind of services. Due to the critical QoS constraints of conversational multimedia services (including voice and video-telephony), a QoS mapping between those services and DiffServ classes must be well defined. Voice and video-telephony services are always mapped within the same EF Premium class to provide them with the best service. However, voice and video have divergent stochastic characteristics. Consequently, this standard mapping leads to heterogeneous traffic multiplexing within the same queues in the aggregating routers, which may deteriorate the best service always provided to voice. Thus, we have proposed a refined mapping which differentiates them. In order to carry out a performance study of voice/video packet scheduling, we have considered two different traffic models for voice and video. Simulation results show that WFQ scheduling with a well chosen weight performs better than FIFO and PQ. In our case, a weight of 0.25 for the voice class gives the optimal overall delay performance for multimedia telephony.

Published in:

Electrical and Computer Engineering, 2004. Canadian Conference on  (Volume:4 )

Date of Conference:

2-5 May 2004