Dr.-Ing. Amr Rizk


Phone: +49 (0) 6151 16 20850
Location: S3|20 222
E-Mail: Amr.Rizk@...

I am an Athene Young Investigator (Independent Research Group head) at the Department of Electrical Engineering and Information Technology at the TU Darmstadt. Since Feb. 2016 I also head the Adaptive Overlay Communications group at KOM.

Previously, I was Post-Doctoral Researcher with the Department of Computer Science at the University of Warwick, U.K., and at the University of Massachusetts Amherst, USA.

8 Private Questions (in german)

Research Interests

My research focus lies on stochastic modeling and optimization of networked service systems. To this end, I develop methods and techniques in the areas of Queuing Theory, Network Calculus and Probability. I apply these analytical tools for the design and quantitative analysis and control of various service systems such as communication networks, industrial processes, (general) storage systems, multimedia and IoT. Since 2016, I have been working on the optimization of adaptive communication systems within the collaborative research center MAKI. My work there is related to the application fields of Software-defined Networking, Multimedia and Caching. Recently, I have been also working on Blockchain based distributed applications.


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Selected Publications

  • B. Alt, T. Ballard, R. Steinmetz, H. Koeppl, and A. Rizk, “CBA: Contextual Quality Adaptation for Adaptive Bitrate Video Streaming,” IEEE INFOCOM – accepted full paper (2019)
  • A. Frömmgen, D. Stohr, B. Koldehofe, and A. Rizk, “Don’t Repeat Yourself: Seamless Execution and Analysis of Extensive Network Experiments,” ACM CoNEXT (2018)
  • W. R. KhudaBukhsh, B. Alt, S. Kar, A. Rizk, H. Koeppl: Collaborative Uploading in Heterogeneous Networks: Optimal and Adaptive Strategies. IEEE INFOCOM (2018)
  • D. Stohr, A. Frömmgen, A. Rizk, M. Zink, R. Steinmetz, W. Efelsberg: Where are the Sweet Spots? A Systematic Approach to Reproducible DASH Player Comparisons. ACM Multimedia (2017)
  • A. Frömmgen, A. Rizk, T. Erbshäußer, M. Weller, B. Koldehofe, A. Buchmann, R. Steinmetz: A Programming Model for Application-defined Multipath TCP Scheduling, ACM/IFIP/USENIX Middleware 2017 - Best paper award
  • W. R. KhudaBukhsh, A. Rizk, A. Frömmgen, H. Koeppl: Optimizing Stochastic Scheduling in Fork-Join Queuing Models: Bounds and Applications. IEEE INFOCOM (2017)
  • S. Subramanya, A. Rizk, D. E. Irwin: Transient Guarantees: Maximizing the Value of Idle Cloud Capacity. ACM SIGHPC Supercomputing (2016)
  • Z. Bozakov, A. Rizk, D. Bhat, M.Zink: Measurement-based Flow Characterization in Centrally Controlled Networks. IEEE INFOCOM (2016)
  • A. Rizk, F.  Poloczek, F. Ciucu: Computable Bounds in Fork-Join Queueing Systems. ACM SIGMETRICS (2015): 335-346
  • M. Fidler, A. Rizk: A Guide to the Stochastic Network Calculus. IEEE Communications Surveys and Tutorials 17(1): 92-105 (2015)


List of publications



Publications @ KOM

Research Projects

Current Projects as PI

Current Projects in my group (non-PI)

  • SFB MAKI - Personalized Video Composition and Distribution (Project C3), DFG
  • SENDATE  - Secure Networking for a Data Center Cloud in Europe (Planets), BMBF
  • E-Finance Lab at the House of Finance (Layer 1)

Previous Projects

  • Joint Power Saving Strategies for Mobile Stations and Multimedia Caches