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1、上海交通大学硕士学位论文基于P2P的流媒体直播系统的分析与研究姓名：傅天泓申请学位级别：硕士专业：计算机技术指导教师：翁惠玉;朱雪芳20081101上海交通大学工程硕士学位论文ABSTRACTTHESTUDYOFASTREAMMEDIALIVEBROADCASTINGSYSTEMOVERPEER-TO-PEERNETWORKSABSTRACTWiththeproliferationofInternetandpopularityofresidentialbroadbandconnections,thereareincreasingdemandsofwatchingtext/a
2、udio/videostreamingmediaviatheInternet.However,thetraditionalClient/Servercommunicationmodelhighlydependsonthecentralizedserver’scapabilityandbandwidth，whichseriouslylimitsthesystem’sscalability,reliabilityandoverallperformance.P2Pbasedstreamingmediadeliverymodeleffectivelyremovesthecentra
3、lserverbottleneck,providesascalablesolutionwithhighreliability.ThereareseveralP2Pbasedstreamingmediasystemsonthemarket.However,theP2Pbasedstreammediasystemstillhaslotsofchallengessuchasdatadeliverylatency,dynamictopology,ADSLasymmetricupstream/downstreambandwidth,NAT/Firewalltraverse,media
4、digitalrightsmanagement,security,andoverallsystemmanageability.Basedonacampusresearchproject,thispaperintroducesbasicP2Pconcepts,andin-depthanalyzesandcomparesseveralP2Pnetworkmodel.ThenitpresentsSuperStream,adatadrivenP2Pbasedlivevideostreamingnetworkmodel.Thisprojectdesignsathree-levelhi
5、erarchicaldistributedpeertopeernetworkcomposedofvideoserver,superpeerandcommonpeernodes.Itthenpresentsthedetailofthree-levelnodesandtheircorrespondingfunctionality,andsuperpeerselection,scheduling,andloadbalancealgorithm.ThissystemisadaptivetothedynamicnetworkII上海交通大学工程硕士学位论文ABSTRACTtopolo
6、gy,supportslargenumberofconcurrentusertoreceivereal-timelivevideostream,betterutilizationofpeersresourceandtradeoffsamongbandwidthefficiency,delayandreliability.Atlast,toprovethefeasibilityandscalabilityoftheSuperStreamsystem,thispapermeasuresthepreliminaryperformanceoftheSuperStreamsystem
7、inacampusintranetintermofprotocolefficiencyanddatalatencies,andstudiessomekeyproblemsaboutthepeersnodemanagementandSPloadcharacteristics.Finally,itlistsdisadvantageofthisproject,andafewthingsthatcanbeimprovedinfutureworks.KEYWORDS：P2P,videostreamingsystem,SP,Q
