Empowering video players in cellular: throughput prediction from radio network measurements

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Raca, Darijo
Zahran, Ahmed H.
Sreenan, Cormac J.
Sinha, Rakesh K.
Halepovic, Emir
Jana, Rittwik
Gopalakrishnan, Vijay
Bathula, Balagangadhar
Varvello, Matteo
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Association for Computing Machinery (ACM)
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Today's HTTP adaptive streaming applications are designed to provide high levels of Quality of Experience (QoE) across a wide range of network conditions. The adaptation logic in these applications typically needs an estimate of the future network bandwidth for quality decisions. This estimation, however, is challenging in cellular networks because of the inherent variability of bandwidth and latency due to factors like signal fading, variable load, and user mobility. In this paper, we exploit machine learning (ML) techniques on a range of radio channel metrics and throughput measurements from a commercial cellular network to improve the estimation accuracy and hence, streaming quality. We propose a novel summarization approach for input raw data samples. This approach reduces the 90th percentile of absolute prediction error from 54% to 13%. We evaluate our prediction engine in a trace-driven controlled lab environment using a popular Android video player (ExoPlayer) running on a stock mobile device and also validate it in the commercial cellular network. Our results show that the three tested adaptation algorithms register improvement across all QoE metrics when using prediction, with stall reduction up to 85% and bitrate switching reduction up to 40%, while maintaining or improving video quality. Finally, prediction improves the video QoE score by up to 33%.
HAS , 4G , LTE , Mobility , Throughput prediction , DASH , Adaptive , Video streaming
Raca, D., Zahran, A. H., Sreenan, C. J., Sinha, R. K., Halepovic, E., Jana, R., Gopalakrishnan, V., Bathula, B. and Varvello, M. (2019) ‘Empowering video players in cellular: throughput prediction from radio network measurements’, Proceedings of the 10th ACM Multimedia Systems Conference, Amherst, Massachusetts, 18-21 June, pp. 201-212. doi: 10.1145/3304109.3306233
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© 2019, Association for Computing Machinery. This is the author's version of the work. It is posted here for your personal use. Not for redistribution. The definitive Version of Record was published in Proceedings of the 10th ACM Multimedia Systems Conference: https://doi.org/10.1145/3304109.3306233