硕士论文-一种基于p2p流媒体直播系统的研究与实现

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1、中南大学硕士学位论文一种基于P2P流媒体直播系统的研究与实现姓名：谭冠兰申请学位级别：硕士专业：计算机技术指导教师：王建新;李建国20080401ABSTRACTThePrevalenceofbroadbandnetworkcontributestotherapidProgressoflivebroadcastingsystems，butstreamingmediabroadcastsystemwhichiSbasedonthetraditionalC／Smodeexistscapacitybottleneck，itisdifficulttoadapttot

2、helarge-scaleapplication．Tothisend，theresearchersmadeaP2Pnetworkbasedonthedistilbutionofstreamingmediatechnology，datawillbedistributedfromthecenterofstreamingmediaserverdistributedtousersontheInternetBasedonP2Pnetworkmakesstreamingmediaservices，andhaveabetterscalability，robustnessa

3、ndpracticality．一ThisPaperintroducesthedevelopmentandtherelatedtechnologiesofp2pstreamingmediafirstly．ThenitdiscussesanP2Pstreamingmediamodel，inthispaper,weproposeaP2Pmediastreamingsystem，inwhichnodescacheandsharewitheachotheraportionofthemediadataconsumedSOtheloadonthemediaserveris

4、alleviatedandmorenodescouldbeserved．Accordingtoaself-organizingalgorithm，nodesplayingthesamemediafilewillautomaticallyformanhierarchicaltree．1ikeP2Pnetwork,rootedatanindexserver．AresourcereportingmechanismiSappliedontopofthehierarchicaltreetomakeresourceinformationgatherattheindexs

5、erverwhichisresponsibleforansweringqueries．Thismakestheproposedsystemhavehighsearchingefficiencyandbeabletobalancetheloadonnodeswithdifferentabilities．Ⅵl，11enselectingwhichnodestogettingdatafrom，System’Ssenderselectionpolicytakesintoaccountbandwidth，hopdistanceandaliveconnectionsof

6、thecandidatesender,soitcanmakebestuseofplayingnodestomakeloadontheserveraslittleaspossible．Itcallalsolessentheburdenofbackbonenetworkbyavoidinglong—distancedatatransfer．Duringdatatransmission,thedynamicmonitoringandcontrollingschemeofthesystemcanensurethedownloadspeedisfastenoughfo

7、rplayingthemedia．Furthermore，System’Sreputationmechanismhelpstoencouragesharingtoimprovesystemperformance．Finally,thepapersumsupourworksduringthedesignandIIdevelopment，anddiscusseshowtoimprovethesysteminthefuture．KEYWORDS：P2Pstreaming，QualityofService，LoadBalance，ReputationMechanis

8、mIII原创性声明本人声明，所呈交的学位论文是本人在