Title: Quality of Experience and Access Network Traffic Management of HTTP Adaptive Video Streaming

Author: Michael Seufert

Supervisor(s) and Committee member(s): Phuoc Tran-Gia (supervisor, reviewer), Burkhard Stiller (reviewer)

URL: https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/15413

ISBN: 1432-8801 (3/17) (ISSN)

michael-seufertThe thesis focuses on Quality of Experience (QoE) of HTTP adaptive video streaming (HAS) and traffic management in access networks to improve the QoE of HAS. First, the QoE impact of adaptation parameters and time on layer was investigated with subjective crowdsourcing studies. The results were used to compute a QoE-optimal adaptation strategy for given video and network conditions. This allows video service providers to develop and benchmark improved adaptation logics for HAS. Furthermore, the thesis investigated concepts to monitor video QoE on application and network layer, which can be used by network providers in the QoE-aware traffic management cycle. Moreover, an analytic and simulative performance evaluation of QoE-aware traffic management on a bottleneck link was conducted. Finally, the thesis investigated socially-aware traffic management for HAS via Wi-Fi offloading of mobile HAS flows. A model for the distribution of public Wi-Fi hotspots and a platform for socially-aware traffic management on private home routers was presented. A simulative performance evaluation investigated the impact of Wi-Fi offloading on the QoE and energy consumption of mobile HAS. The thesis won the Best Dissertation Award at IEEE/IFIP Network Operations and Management Symposium (NOMS) in Taipei, Taiwan in April 2018.

Chair of Communication Networks, University of Würzburg

URL: http://www.comnet.informatik.uni-wuerzburg.de/en/home/

The Chair of Communication Systems of the University of Würzburg consists of Prof. Phuoc Tran-Gia (head of chair), Prof. Tobias Hoßfeld, Prof. Harald Wehnes (honorary professor), and 14 research assistants. Different groups at the chair work at the following topics:
- Modeling and Performance Analysis
- Next Generation Networks
- Future Internet Applications & Overlays
- Cloud Applications and Networks

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