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dc.date.accessioned2020-05-16T18:48:22Z
dc.date.available2020-05-16T18:48:22Z
dc.date.created2020-01-13T15:54:03Z
dc.date.issued2019
dc.identifier.citationBarik, Runa Welzl, Michael Elmokashfi, Ahmed Dreibholz, Thomas Islam, Safiqul Gjessing, Stein . On the Utility of Unregulated IP DiffServ Code Point (DSCP) Usage by End Systems. Performance evaluation (Print). 2019, 135
dc.identifier.urihttp://hdl.handle.net/10852/75804
dc.description.abstractDiffServ was designed to implement service provider quality of service (QoS) policies, where routers change and react upon the DiffServ Code Point (DSCP) in the IP header. However, nowadays, applications are beginning to directly set the DSCP themselves, in the hope that this will yield a more appropriate service for their respective video, audio and data streams. WebRTC is a prime example of such an application. We present measurements, for both IPv4 and IPv6, of what happens to DSCP values along Internet paths after an end system has set them without any prior agreement between a customer and a service provider. We find that the DSCP is often changed or zeroed along the path, but detrimental effects from using the DSCP are extremely rare; moreover, DSCP values sometimes remain intact (potentially having an effect on traffic) for several AS hops. This positive result motivates an analysis of the potential latency impact from such DSCP usage, for which we present the first measurement results. We find that routers at approximately 3% of more than 100,000 links differentiate between the WebRTC DSCP values (EF, AF42 and CS1) and consistently reduce delay in comparison with probes carrying a zero value (CS0) under congestion. In contrast, routers at around 2% of these links increase the delay by a comparable amount under congestion, uniformly for EF, AF42 and CS1.en_US
dc.languageEN
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleOn the Utility of Unregulated IP DiffServ Code Point (DSCP) Usage by End Systemsen_US
dc.typeJournal articleen_US
dc.creator.authorBarik, Runa
dc.creator.authorWelzl, Michael
dc.creator.authorElmokashfi, Ahmed
dc.creator.authorDreibholz, Thomas
dc.creator.authorIslam, Safiqul
dc.creator.authorGjessing, Stein
cristin.unitcode185,15,5,75
cristin.unitnameDIS Digital infrastruktur og sikkerhet
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2
dc.identifier.cristin1771754
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Performance evaluation (Print)&rft.volume=135&rft.spage=&rft.date=2019
dc.identifier.jtitlePerformance evaluation (Print)
dc.identifier.volume135
dc.identifier.doihttps://doi.org/10.1016/j.peva.2019.102036
dc.identifier.urnURN:NBN:no-78855
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn0166-5316
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/75804/1/dscp.pdf
dc.type.versionPublishedVersion
cristin.articleid102036
dc.relation.projectEC/H2020/644334


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