QoE-Assured 4K HTTP Live Streaming via Transient Segment Holding at Mobile Edge

HTTP-based live streaming has become increasingly popular in recent years, and more users have started generating 4K live streams from their devices (e.g., mobile phones) through social-media service providers like Facebook or YouTube. If the audience is located far from a live stream source across...

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Veröffentlicht in:IEEE journal on selected areas in communications 2018-08, Vol.36 (8), p.1816-1830
Hauptverfasser: Ge, Chang, Wang, Ning, Chai, Wei Koong, Hellwagner, Hermann
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creator Ge, Chang
Wang, Ning
Chai, Wei Koong
Hellwagner, Hermann
description HTTP-based live streaming has become increasingly popular in recent years, and more users have started generating 4K live streams from their devices (e.g., mobile phones) through social-media service providers like Facebook or YouTube. If the audience is located far from a live stream source across the global Internet, TCP throughput becomes substantially suboptimal due to slow start and congestion control mechanisms. This is especially the case when the end-to-end content delivery path involves radio access network at the last mile. As a result, the data rate perceived by a mobile receiver may not meet the high requirement of 4K video streams, which causes deteriorated quality-of-experience (QoE). In this paper, we propose a scheme named edge-based transient holding of live segment (ETHLE), which addresses the abovementioned issue by performing context-aware transient holding of video segments at the mobile edge with virtualized content caching capability. Through holding the minimum number of live video segments at the mobile edge cache in a context-aware manner, the ETHLE scheme is able to achieve seamless 4K live streaming experiences across the global Internet by eliminating buffering and substantially reducing initial startup delay and live stream latency. It has been deployed as a virtual network function at an LTE-A network, and its performance has been evaluated using real live stream sources that are distributed around the world. The significance of this paper is that by leveraging virtualized caching resources at the mobile edge, we address the conventional transport-layer bottleneck and enable QoE-assured Internet-wide live streaming services with high data rate requirements.
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subjects Ambient intelligence
Caching
Digital media
Electronic devices
HTTP live streaming
Internet
Mobile communication systems
mobile edge computing
network function virtualization
Quality assessment
Quality of experience
Receivers
Segments
Streaming media
TCP (protocol)
Transient analysis
video caching
Video data
Wireless communications
title QoE-Assured 4K HTTP Live Streaming via Transient Segment Holding at Mobile Edge
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