Our faculty member M. Akif Yazıcı has completed the research project entitled "Stochastic Models for the Quality of Experience for Video Playout in Wireless Networks." The research outputs have been presented at the 26th International Conference on Analytical & Stochastic Modelling Techniques & Applications (ASMTA) conference, and published as a chapter in the Springer Lecture Notes in Computer Science, volume 13104.

DOI: https://doi.org/10.1007/978-3-030-91825-5_29

Abstract
We present an analytical framework to obtain the distribution of frozen, low quality, and high quality video in a setting with two video quality levels where the channel is dynamic and the data rate the user can achieve varies with time. The presented model, which is based on multi-regime Markov fluid queues, is also capable of producing the distribution of the excess data present in the playout buffer at the end of the video session duration, which will be wasted. The playout control is assumed to be hysteretic, and the effects of the values of thresholds selected for starting playout, switching to low/high quality levels, and pausing/resuming download on the distribution of video quality and excess data is investigated. The presented model can be extended to quality levels more than two.

Stochastic Models for the Quality

İTÜ Informatics Institute

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ITU Informatics Institute provides graduate-level education and research in applied informatics, computer sciences, computational science and engineering, communication systems under the following programs.

Faculty members and students conduct research supported by national and international organızatıons in the fields of electromagnetic fields, communication systems/regulations, computational materials design, computational chemistry/biology, cryptography, signal/data processing/visualization, big data management, climate and ocean sciences, 

  • The paper titled “Non-Invasive Complete Hemodynamic Model to Investigate the Effect of Multi-Stenosis in Patient-Specific Coronary Arteries”, jointly prepared by research assistants Hacer Duzman and E. Cenk Ersan, andProf. Dr. M. Serdar Çelebi from the Computational Science and Engineering Program, has been awarded the Best Paper Award at the ESM’25. (22-24 Oct. 2025 Belgium)
  • Hacer Duzman and Muhammed Enis Şen, PhD students of Computational Science and Engineering Program, received awards in the "5 Minute Thesis Competition" organized at the "Başarım 2024 8th National High Performance Computing Conference".

There is also a High Performance Computing Laboratory established with the support of the State Planning Organization within the Institute.