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Experimental QoE evaluation of multicast video delivery over IEEE 802.11aa WLANs

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SPEAKER: Prof. Pablo Serrano (UC3M, Spain)

  • Colloquium Series
When Sep 28, 2017
from 04:00 PM to 05:00 PM
Where IF 4.31/33
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The IEEE 802.11aa amendment standardised the Group Addressed Transmission Service (GATS), which extends 802.11 WLANs with a novel set of MAC mechanisms to support an effective and efficient multicast video service. The key challenge with GATS is the selection of the best scheme and its configuration for a given network scenario, as the standard does not provide any guidelines nor any assessment of the performance of each mechanism. Although some previous studies have addressed this challenge, their evaluation is either via analysis or simulations under non-realistic assumptions, or based on "objective metrics"' (e.g., average throughput, losses) instead of subjective quality metrics, which are required for a proper video performance assessment.

In this work, we deploy a mid-size real-life testbed and develop a thoughtful methodology to perform an extensive Quality of Experience (QoE)  evaluation of GATS under a variety of scenarios. We analyse the performance of the novel schemes under ideal conditions, as well as under controlled and non-controlled interference, assessing their ability to provide an adequate QoE and quantifying the resources left for other type of traffic. Ours is the first thorough QoE evaluation of GATS in a real-life scenario, providing key insights on their performance, and can be used to derive configuration guidelines for the schemes.


Pablo Serrano got his Telecommunication Engineering degree and his PhD from the Universidad Carlos III de Madrid (UC3M) in 2002 and 2006, respectively. He has been with the Telematics Department of UC3M since 2002, where he currently holds the position of Associate Professor. He was a visiting researcher at the Computer Network Research Group at Univ. of Massachusetts Amherst in 2007 under a José Castillejo grant, at Telefonica Research Center in Barcelona in 2013, at the School of Computer Science and Statistics at Trinity College Dublinin 2015, and at Universita degli Studi di Brescia in 2016.

He has over 70 scientific papers in peer-reviewed international journal and conferences. He serves on the Editorial Board of IEEE Communications Letters, has served as guest editor for Computer Networks, and has served on the TPC of a number of conferences and workshops including IEEE INFOCOM, IEEE WoWMoM and IEEE Globecom. His research interests lie in the analysis of computer communications systems, in particular wireless networks, including resource allocation problems, energy consumption analysis, and the design of network protocols and systems. Recently, he enjoys carrying out experimental performance evaluation of protocols and communication systems. He is a Senior Member of the IEEE.

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