APP and PHY in Harmony: Demonstrating Scalable Video Streaming Supported by Flexible Physical Layer Control

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Denny Stohr*, Matthias Schulz*, Matthias Hollick and Wolfgang Effelsberg

* These authors contributed equally to this work.


The presented work was accepted as a demonstrator at the International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM 2015).


Wireless, high-bandwidth data transfer gains increasing significance with a wider adoption of high-quality video streaming on mobile devices. Technologies enabling such data transfer (e.g., 802.11 or LTE) can adapt dynamically to changing conditions, which allows data transfers in a reliable way. However, applications have little or no influence on how those underlying systems execute their adaptations. Yet, in applications such as video streaming, this could provide important clues on what requirements are relevant for data delivery. In this demonstration, we present a system that allows application- defined underlay control to use such potentials in a mobile scalable video based streaming scenario by combining Android smartphones with software-defined radios (SDRs) for advanced physical layer control.



  • WoWMoM 2015 Poster
  • WoWMoM 2015 Paper
  • WoWMoM 2015 APK fileThe APK of the App presented at the WoWMoM 2015. You can stream video files or live camera streams. If you do not have a WARP, you can start an access point on your smartphone and connect to it, however, this only allows to transmit the base layer, due to broadcast frames that are always transmitted at the lowest data rate. You can also stream directly to your phone (localhost mode).


Prof. Dr.-Ing. Matthias Hollick

Technische Universität Darmstadt
Department of Computer Science
Secure Mobile Networking Lab 

Mornewegstr. 32 (S4/14)
64293 Darmstadt, Germany

Phone: +49 6151 16-25472
Fax: +49 6151 16-25471


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