Analytical QoE models for bit-rate switching in dynamic adaptive streaming systems

Yuedong Xu, Yipeng Zhou, Dah-Ming Chiu

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Video streaming service in wireless networks is increasingly using dynamic selection of video bit-rates to provide a high quality of user experience (QoE). The bit-rate switching mechanism, performed at client side, plays a key role in determining QoE metrics. In this paper, we present the first analytical framework to compute starvation probability of playout buffer, continuous playback time and mean video quality, given the bit-rate switching logics. Wireless channel is modeled as a continuous time Markov process, and playout buffer is modeled as a fluid queue with Markov modulated fluid arrival. We construct a set of ordinary differential equations (ODEs) to characterize the dynamics of starvation probability and expected continuous playback time with regard to buffer length, and simple models to analyze mean bit-rate for different bit-rate switching algorithms. Our framework is very general in that by adding appropriate parameters, it can be utilized to predict the QoE metrics of dynamic adaptive streaming with a variety of features: i) buffer-aware bit-rate switching ii) (im)patience of the user, and iii) receiver-side flow control.
Original languageEnglish
Pages (from-to)2734-2748
Number of pages15
JournalIEEE Transactions on Mobile Computing
Volume13
Issue number12
DOIs
Publication statusPublished - Dec 2014
Externally publishedYes

Keywords

  • Bit-rate switching
  • quality of experience
  • starvation
  • ordinary differential equations

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