欢迎来到天天文库
浏览记录
ID:34656303
大小:69.23 KB
页数:12页
时间:2019-03-08
《design and implementation of a qos-aware replication mechanism for a distributed multimedia》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、DesignandImplementationofaQoS-awareReplicationMechanismforaDistributedMultimediaSystemGiwonOn1,JensB.Schmitt1andRalfSteinmetz1,212IndustrialProcessandSystemCommunicationsGMDIPSIDept.ofElectricalEng.&GermanNationalResearchCenterInformationTechnologyforInformationT
2、echnologyDarmstadtUniversityofTechnologyDolivostr.15•D-64293Darmstadt•GermanyMerckstr.25•D-64283Darmstadt•GermanyMail:{Giwon.On,Jens.Schmitt,Ralf.Steinmetz}@KOM.tu-darmstadt.deAbstract.Thispaperpresentsthedesignandimplementationarchitectureofareplicationmechanism
3、foradistributedmultimediasystemmedianodewhichiscurrentlydevelopedasaninfrastructuretosharemultimedia-enhancedteachingmaterialsamonglecturegroups.Theproposedreplicationmechanismsupportsthequalityofservice(QoS)characteristicsofmultimediadataandtheavailabilityofsyst
4、emresources.EachtypeofdatahandledandreplicatedareclassifiedaccordingtotheirQoScharacteristicsandreplicationrequirements.Themaincontributionofthispaperistheidentificationofnewreplicationrequirementsindistributedmultimediasystemsandamulticast-basedupdatepropagation
5、mechanismbywhichnotonlytheupdateeventsaresignalled,butalsotheupdateddataareexchangedbetweenreplicationmanagers.Byprototypingtheproposedreplicationmechanisminmedianode,weprovethefeasibilityofourconceptforcombiningtheQoSconceptwithreplicationmechanisms.1Introductio
6、nOnemajorproblemaboutusingmultimediamaterialinlecturingisthetrade-offbetweenactualityofthecontentandqualityofthepresentations.Afrequentneedforcontentrefreshmentexists,buthighqualitypresentationcannotbeauthoredbytheindividualteacheraloneattherequiredrate.Thus,itis
7、desirablethatteacherspresentingthesameoratleastsimilartopicsbutworkatdifferentlocationscaneasilysharetheirmultimedia-enhancedlecturematerials.Themedianodeproject[1]isintendedtoprovidesuchmeansforsharingtolecturersattheuniversitiesoftheGermanstateHessen.Thedesigno
8、fthemedianodesystemaddressesissuesofavailability,qualityofservice,accesscontrolanddistributionofdata.Tosupportteachers,itmustallowfortransparentaccesstosharedc
此文档下载收益归作者所有