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

Ge, Chang, Wang, Ning, Chai, W and Hellwagner, H (2018) QoE-Assured 4K HTTP Live Streaming via Transient Segment Holding at Mobile Edge IEEE Journal on Selected Areas in Communications (J-SAC), 36 (8). pp. 1816-1830.

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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 (RAN) 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 issue above 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.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Chai, W
Hellwagner, H
Date : 7 June 2018
Funders : EPSRC
DOI : 10.1109/JSAC.2018.2845000
Copyright Disclaimer : © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
Uncontrolled Keywords : —HTTP live streaming, mobile edge computing, network function virtualization, quality of experience, video caching
Depositing User : Melanie Hughes
Date Deposited : 31 May 2018 11:08
Last Modified : 11 Dec 2018 11:24

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