she has been with Telecommunications Research Center Vienna, Austria, where she has been working on the performance analysis of P2P based applications. Her main research interest is the simulative and analytical performance evaluation and optimization of wireless sensor and mesh networks. A second research topic is QoE and application layer aware radio resource management for wireless mesh networks. Würzburg. He has lead multiple industry cooperations in the field of GPRS, UMTS, and HSPA radio network planning with T-Mobile International, France Telecom R&D, and Vodafone Netherlands. His main research interests are on wireless networks including analytic modeling and simulation of wireless networks, radio network planning, (application layer aware) radio resource management, and source traffic modeling of wireless applications. A second research topic is P2P networking, where he is interested in modeling and optimizing P2P overlays.David Stezenbach is now with the University of Vienna: AbstractThe browser has become the users' interface to a plethora of Internet applications which are accessible from nearly everywhere and every device. The price for the simple and cheap access over the Internet is often a reduced end-user quality of experience (QoE). The reason for this is that the network ignores the content of the packets it transports and thereby neither knows which services it supports, nor if and which quality requirements have to be given. In addition, the needs of the applications can be time varying, and the network might not be able to give strict quality guarantees. We therefore advocate the idea of an application-network interaction in order to dynamically adapt the network resources if a QoE degradation is imminent. The software suite AquareYoum implements this approach and enables a smooth YouTube video playback in a congested wireless mesh Internet access network by dynamically selecting the least congested Internet gateway.

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