Can accurate predictions improve video streaming in cellular networks?

Xuan Kelvin Zou, Jeffrey Erman, Vijay Gopalakrishnan, Emir Halepovic, Rittwik Jana, Xin Jin, Jennifer L. Rexford, Rakesh K. Sinha

Research output: Chapter in Book/Report/Conference proceedingConference contribution

78 Scopus citations

Abstract

Existing video streaming algorithms use various estimation approaches to infer the inherently variable bandwidth in cel- lular networks, which often leads to reduced quality of expe- rience (QoE). We ask the question: \If accurate bandwidth prediction were possible in a cellular network, how much can we improve video QoE?". Assuming we know the bandwidth for the entire video session, we show that existing stream- ing algorithms only achieve between 69%-86% of optimal quality. Since such knowledge may be impractical, we study algorithms that know the available bandwidth for a few sec- onds into the future. We observe that prediction alone is not sufficient and can in fact lead to degraded QoE. However, when combined with rate stabilization functions, prediction outperforms existing algorithms and reduces the gap with optimal to 4%. Our results lead us to believe that cellular operators and content providers can tremendously improve video QoE by predicting available bandwidth and sharing it through APIs.

Original languageEnglish (US)
Title of host publicationHotMobile 2015 - 16th International Workshop on Mobile Computing Systems and Applications
PublisherAssociation for Computing Machinery, Inc
Pages57-62
Number of pages6
ISBN (Electronic)9781450333917
DOIs
StatePublished - Feb 12 2015
Event16th International Workshop on Mobile Computing Systems, HotMobile 2015 - Santa Fe, United States
Duration: Feb 12 2015Feb 13 2015

Publication series

NameHotMobile 2015 - 16th International Workshop on Mobile Computing Systems and Applications

Other

Other16th International Workshop on Mobile Computing Systems, HotMobile 2015
CountryUnited States
CitySanta Fe
Period2/12/152/13/15

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Computer Science Applications

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  • Cite this

    Zou, X. K., Erman, J., Gopalakrishnan, V., Halepovic, E., Jana, R., Jin, X., Rexford, J. L., & Sinha, R. K. (2015). Can accurate predictions improve video streaming in cellular networks? In HotMobile 2015 - 16th International Workshop on Mobile Computing Systems and Applications (pp. 57-62). (HotMobile 2015 - 16th International Workshop on Mobile Computing Systems and Applications). Association for Computing Machinery, Inc. https://doi.org/10.1145/2699343.2699359