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  • COMCOM-D-14-00750R1

    Rights statement: This is the author’s version of a work that was accepted for publication in Computer Communications. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Computer Communications 69, 2015 DOI: 10.1016/j.comcom.2015.06.015

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Using software defined networking to enhance the delivery of video-on-demand

Research output: Contribution to journalJournal article

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<mark>Journal publication date</mark>15/09/2015
<mark>Journal</mark>Computer Communications
Volume69
Number of pages9
Pages (from-to)79-87
StatePublished
Early online date4/07/15
Original languageEnglish

Abstract

High quality online video streaming, both live and on-demand, has become an essential part of many consumers’ lives. The popularity of video streaming, however, places a burden on the underlying network infrastructure. This is because it needs to be capable of delivering significant amounts of data in a time-critical manner to users. The Video-on-Demand (VoD) distribution paradigm uses a unicast independent flow for each user request. This results in multiple duplicate flows carrying the same video assets that only serve to exacerbate the burden placed upon the network. In this paper we present OpenCache: a highly configurable, efficient and transparent in-network caching service that aims to improve the VoD distribution efficiency by caching video assets as close to the end-user as possible. OpenCache leverages Software Defined Networking technology to benefit last mile environments by improving network utilisation and increasing the Quality of Experience for the end-user. Our evaluation on a pan-European OpenFlow testbed uses adaptive bitrate video to demonstrate that with the use of OpenCache, streaming applications play back higher quality video and experience increased throughput, higher bitrate, and shorter start up and buffering times.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Computer Communications. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Computer Communications 69, 2015 DOI: 10.1016/j.comcom.2015.06.015