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dc.contributor.authorLi, Wenjie
dc.contributor.authorFayed, Marwan
dc.contributor.authorOteafy, Sharief M. A.
dc.contributor.authorHassanein, Hossam S.
dc.identifier.citationLi , W , Fayed , M , Oteafy , S M A & Hassanein , H S 2019 , ' A cache-level quality of experience metric to characterize ICNs for adaptive streaming ' , IEEE Communications Letters , vol. 23 , no. 2 , 8594670 , pp. 262-265 .
dc.identifier.otherPURE: 257071675
dc.identifier.otherPURE UUID: 8c0b7438-20af-41ba-abc2-d63b86842add
dc.identifier.otherORCID: /0000-0002-0970-7972/work/52572506
dc.identifier.otherScopus: 85062895713
dc.identifier.otherWOS: 000458764100017
dc.description.abstractAdaptive streaming has motivated information-centric network (ICN) designs to improve end-user quality of experience (QoE). However, their management and evaluation rely either on conventional cache-level metrics that are poor representations of QoE, or consumer-side indicators that are opaque to network services. This letter proposes a measure to bridge the gap between cache performance and consumer QoE. We introduce maximal sustainable bitrate (MSB), defined as the highest bitrate deliverable in time to be in time to meet a given request without buffering. Based on our observations, we posit that QoE is maximal when requested bitrates match a cache’s MSB for that content. We design a cache-level reward function as a benchmark metric that measures the difference between requested bitrates and MSB. We hypothesize that aggregated rewards are an indicator of overall system performance. Performance evaluations show high correlation between the sum of cache rewards and consumer QoE.
dc.relation.ispartofIEEE Communications Lettersen
dc.rights© 2018, IEEE. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at
dc.subjectDynamic Adaptive Streamingen
dc.subjectIn-network cachingen
dc.subjectPerformance metricsen
dc.subjectQA75 Electronic computers. Computer scienceen
dc.subjectT Technologyen
dc.titleA cache-level quality of experience metric to characterize ICNs for adaptive streamingen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. School of Computer Scienceen
dc.description.statusPeer revieweden

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