Einladung zur öffentlichen Disputation

von Herrn Alireza Abdollahpouri

Montag, 13. August 2012 um 10:30 Uhr
Informatikum, Vogt-Kölln-Straße 30, Raum F-635

"QoS-Aware Live IPTV Streaming Over Wireless Multi-hop Networks"

Abstract:

New generation which have grown up with Internet and interactive gaming, are no longer satisfied with traditional one-way broadcasting of TV programs. The paradigm shift from push-based media broadcasting to pull-based media streaming has been started in recent years and will be accelerated in the next few years. Internet Protocol Television (IPTV) is a good example to illustrate this claim.

IPTV describes a mechanism for transporting TV streams encapsulated in IP packets using networking protocols and offers more interactivity and more control over the content. However, the stringent QoS requirements of IPTV streams are very hard to achieve in wireless networks. This is mainly related to the natural characteristics of wireless environments, such as frequent packet loss, vulnerability to physical factors and fluctuations in channel condition. The problem becomes even worse in multi-hop wireless networks.

In this thesis, we investigate some of the challenges of IPTV transmission, mainly in wireless networks. The type of wireless networks which will be covered by this thesis is based on OFDMA-based WiMAX networks. In particular, we focus on the following aspects: the efficiency of multicasting, modeling the behavior of IPTV users, capacity evaluation and effects of overhead in WiMAX networks, and reducing channel switching delay.

 

Alle Mitglieder des Fachbereichs Informatik sind zu dieser öffentlichen Veranstaltung herzlich eingeladen.

Kontakt:

Prof. Dr. Bernd Page
Vorsitzender des Promotionsprüfungsausschusses