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Protecting video service quality in multimedia access networks through PCN

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4 Author(s)
Latré, S. ; IBBT, Ghent Univ., Ghent, Belgium ; Roobroeck, K. ; Wauters, T. ; Turck, F.D.

The growing popularity of video-based services and their corresponding unpredictable bursty behavior makes the design of an admission control system an important research challenge. The pre-congestion notification (PCN) mechanism is a measurement-based approach, recently standardized by the IETF, optimized toward the admission of inelastic flows, where the number of flows is sufficiently large that individual bursts of flows can be compensated by silence periods of others. In this article, we discuss the implications of applying PCN to protect video services, which have less predictable behavior. Several algorithms for protecting video services in multimedia access networks are described. Through performance evaluation, we show the impact of these algorithms on the network utilization and video quality, and present guidelines on how to configure a PCN system.

Published in:

Communications Magazine, IEEE  (Volume:49 ,  Issue: 12 )

Date of Publication:

December 2011

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