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Evaluation of QoE of WebServices

Evaluation of QoE of WebServices

ThispaperstudiesamethodofassessingQoEofWebservicesonamobilehostoverawirelessLAN.ToperformQoEassessment,theauthorsutilizetheirintegratedsimulator/emulatorsystem.ThisexperimentassumessixscenarioswherepedestriansassessWebserviceswhilemoving.TheauthorstreatashoppingserviceandaWikiserviceastargetWebservicesandconsiderWebusabilityasQoE.TheexperimentalresultsdonotconfirmthatdegradationofQoEdependsonthatofQoS.Consequently,itisinevitabletoassessactualQoEandtheintegratedsimulator/emulatorsystemiseffectiveinperformingsuchassessment

https://arudhrainnovations.com/ Currently,becauseofthepenetrationofwirelessdevices,opportunitytouseaWebserviceoverawirelessLANhasbeenincreasing.Consequently,wecanoftenutilizesomeWebserviceswhilemovingonfoot,bycar,orbytrain.ThismeansthatweshouldevaluateaWebservicetreatingaWebclientasamobilehost.Ascomparedwithcommunicationonastationaryhost,thequalityofcommunicationonamobilehostcanbeeasilydegradedbecauseoffading,waveinterferenceandsoon.Therefore,quantitativeevaluationofthequalityofaWebserviceonamobilehostisrequired.Especiallyitshouldbedoneinuserviewpointconsideringthatauserfinallydecidesthequality.Notethatthequalityofservice(QoS)inuser’sviewpointisoftenreferredtoasqualityofexperience(QoE).Thus,thispaperalsoadoptstheseterms.ToevaluateQoEofaWebservice,itisnecessaryforactualuserstoutilizetheWebserviceoveranactualnetworkandevaluateitwithsomesubjectivemethods.Inordertodothis,anexperimentermustprepareactualexperimentaldevices,suchasanaccesspoint(AP),somestations(STAs),andsoon.Moreover,iftheexperimenterassumesaWebclienttobeamobilehost,theusers(experimentalsubjects)mustusetheWebservicewhilemovingformanytimes.Thisimposesaheavyburdenontheusersandmakeslowreproducibilityoftheexperiment. https://arudhrainnovations.com/

Insteadofpreparingactualexperimentalenvironments,wecanconsiderusinganetworksimulatortoevaluateQoSofaWebserviceonamobilehost.However,sincethenetworksimulationisclosedwithinacomputer,usershardlyperformsubjectiveevaluationforsimulatedresults.Therefore,evalua-tionwithnetworksimulatorisnotalwayssuitablefortheQoEassessmentOntheotherhand,byusinganetworkemulator,itiseasytoconstructexperimentalenvironmentwhichcanmakesubjectsassess.Inthispaper,thenetworkemulatormeansadevicewhichcanemulateaWAN/LANline,e.g.Tcpdump[1].Indeed,subjectscanassessQoEforanactualWebserviceinsuchanexperimentalenvironmentwithanemulator,butitisdifficultforalmostnetworkemulatorstoemulatecomplexcharacteristicsofawirelessLAN,suchasradiointerference,fading,mobilityofhostsandsoon.Thatis,anexperimentwithanemulatorisnotexactlyadequateforQoEassessmentofaWebserviceonamobilehost.

Evaluation of QoE of WebServices

Webclient.TheWebserverisconnectedtotheWebclientviatheintegratedsimulator/emulatorsystem,whichperformssimulationaccordingtothescenariosdescribedinthenextsubsection.TablesI,IIandIIIshowthespecificationsoftheWebclient,theintegratedsimulator/emulatorsystemandtheWebserver,respectively.ThispaperadoptsashoppingserviceandaWikiserviceastargetWebservices.TheshoppingserviceisaWebservicewhichincludesalotofHTMLfilesandimages,andWikiserviceconsistsonlyHTMLfiles.Astasks,thesubjectssearchsomeproductsdesignedbytheexperimentsfortheshoppingservice,andfindanswersofagivenquestionfortheWikiservice.Wesettasksthatsubjectschooseitemsspecifiedinshoppingservice,andlookforanswersofgivenquestioninWikiservice.Thesubjectsaremenaround20yearsold,andthenumberofthemis12

Inthisstudy,weperformedQoEassessmentundertheenvironmentsassumingthepedestrianusingtheintegratedevaluationsystemusingthesimulatorandtheemulator,andevaluateWebusability.Fromthisresult,wefoundthatWebusabilityisnotdegradedexpectforsomeenvironmentsinthiscase.ThisindicatesthatQoEevaluationwiththesimu-lator/emulatorsystemisadequate.Asourfuturework,itwasintendedforscenariosthatareintendedtobepedestrianthistime,butweconsiderascenariothatassumesmovementsuchascarortrain,andexperimentsinotherWebservices. SEO Company Arudhra Innovations