experience with the vunet a network architecture for a distributed multimedia systemnew

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1、ExperiencewiththeVuNet:ANetworkArchitectureforaDistributedMultimediaSystemJoelF.Adam,HenryH.Houh,DavidL.Tennenhouse∗MITLaboratoryforComputerScience†Cambridge,MA02139AbstractThegeneralpracticeinboththeanaloganddigitalTheVuNetisagigabit-per-seconddesk/local-areasystemsisfortheappli

2、cationtonevertouchthemulti-ATMnetworkbuiltinthecontextoftheViewStationmediadatabuttomerelycontroldedicatedhardwaredistributedmultimediaproject.TheViewStationsys-whichprocessesit.Researchershaveusedthephrasetemtakesasoftware-intensiveapproachtomultime-‘trafficcop’todescribetheroleof

3、theseapplications.diawherereal-timedataisprocessedattheapplica-Sincebothtypesofsystemsusespecializedhard-tionlevelandnotinspecializedhardware.TheVuNetwaretohandlemultimediainformation,theirfunc-hardwarehasbeenspecificallydesignedtosupportthistionalityisrestrictedtothecapabilitieso

4、fthehard-softwaremodel.Inparticular,thenetworkinterfaceware.Currentimplementationsofthesesystemshavehasbeendesignedforeaseofuse.AkeyfeatureofthefocusedonteleconferencingtypeapplicationsandareVuNetisthatthemoresophisticatedfunctionstypi-limitedtothose.Thewiderangeofmultimediaap-ca

5、llyfoundinATMnetworkshavebeenpushedouttoplicationsbeingdescribedintheliteraturecannotbetheedgesofthesystemtobecometheresponsibilityofimplemented[2].theclientsinexchangeforsimplicityandefficiency.Webelievethenextstepintheevolutionofmulti-ThispaperdescribestheVuNethardwareandpresents

6、mediasystemsinvolvesallowingmultimediainforma-theresultsofexperimentsinwhichvideoistransportedtiontoreachtheapplication.Thismeanschannelingacrossthesystem.themultimediainformationtotheworkstationpro-cessorratherthanbypassingitwithspecializedhard-ware.Thiswillallowagreatervarietyo

7、fmultime-diaapplicationsthatgobeyondteleconferencing.The1IntroductionmainargumentagainsthavingtheapplicationtouchThedesignofdistributedmultimedia(videoandthemultimediainformationisthatworkstationscan-audio)systemshasevolvedoverthepastfiveyears.nothandlevideo.However,webelievethisi

8、sashort-Earlysystemswerecharacterizedbya