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1、CommunicationNetworksPricingFrameworkforaDifferentialServicesInternetMICHAELS.BORELLA,VANDANAUPADHYAY,IKHLAQSIDHU3ComCorp.,1800W.CentralRd.,MountProspectIL,60056,USA{mike_borella,vandana_upadhyay,ikhlaq_sidhu}@3com.comAbstract.Anumberofrecentproposalsandp
2、roposedstandardshaveaddressedaddingdifferentialservicestotheInternet.Althoughtheirdetailsandtentativeimplementationsdiffer,mostarerecommendingwhatessentiallyamountstomultiplelevelsofbest-effortservice.Inthispaper,wesurveyrecentdifferentialservicesandprici
3、ngproposalsandintroduceapricingframeworkforadifferentiated-servicesnetworkthatfocusesonsimplicity,flexibility,andeaseofimplementation.Inparticular,ourmodelcanbeusedinthecurrentheterogeneousInternetwithoutmajorrestructuring.Wefocusonflat-rate,per-timeandus
4、age-basedpricing,whereuserscanchangetheirservicelevelonanad-hocbasis.Wealsoshowthatasender-paysmodelwithback-chargingissimpletoimplementandcanbeeffectiveevenincompli-catedtransactions,suchasmulticasting.Ourapproachisdifferentfrommanypreviousproposalsandco
5、nsciouslyinte-gratesdifferentialservicesandpricingwithimplementationastheimmediategoal.Finally,weoutlinefutureareasofresearchincludingISPsupportforpricing,thedynamicsofservicequalityandpricinginadifferentiatedInternet,andthelatesttrendsanddirectionsofQoSd
6、eploymentandstandardization..1INTRODUCTIONityateachrouterinaflow’spathsothat,inconjunctionwithadmissioncontrolandabounded-delayqueuingdis-CurrentlytheInternet,andIPnetworksingeneral,cipline,suchasWeightedFairQueuingoroneoritsvari-supportsasinglelevelofbes
7、t-effortservice.Alldataants[3],end-to-endQoSguaranteescanbemade.How-packetsarequeuedandforwardedwiththesamepriority.ever,RSVPisveryresourceintensive(intermsofsignal-Thereisnoguaranteethatanygivenpacketwillactuallyingandcontrol,aswellasrequiringper-flowsch
8、eduling)reachitsdestination,muchlessarriveinatimelyfashion.andhasnotenjoyedstrongsupportthroughoutthenet-Thisflatservicemodelhasworkedsurprisinglywell,asworkingcommunity.InanefforttoextendIPsothatittheInternethasgro
