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1、ABSTRACTABSTRACTInrecentyears,withcontinuousdevelopmentofcomputerandInternettechnology,themultimediatechnologywhichisdemandingtonetworkbandwidth,hasalsobeenfullydeveloped,amongthemP2P-basedstreamingmediatechnologyhasbecomearesearchhotspot.ThedevelopmentofP2Pnetworksp
2、rovidesuswithagoodwayofsharingresources,andweproposeaP2P-basedlivestreamingsystemcalledSAStream(self-adaptionstream).ThesystemmatchestheadvantagesofP2PandovercomesthedrawbacksoftraditionalIPTV,suchashighinputs,largescaleandtechnologydifficulty.Eachuserisaresourceprov
3、ideraswellasaconsumer,whocanmakebestuseofexistingnetworkresourcesandenjoysmoothvideoserviceswithoutneedofadditionalequipments.Inthisthesis,thedevelopmentoftheP2Pstreamingmediatechnologyisfirstintroduced,fouroverlaynetworkstructureofP2Pisanalyzedandcompared;thensomety
4、picalP2Plivestreamingsystemmodels,specificallysinglemulticasttreebasedmodel,multiplemulticasttreesbasedmodelandGossipprotocolbasedmodelareanalyzed,theiradvantages,disadvantages,thescopeofapplicationaswellastheircomparisonsarealsorepresented,Theaboverelatedworkisinval
5、uableforthedesignoflivestreamingsystem.BasedonDONetmodel,thestreaminglivebroadcastingsystemSAStream(Self-adaptionStream)isdesignedtosolvesomeproblemsofthecurrentsystem,andthedesignandtheoverallframeworkofthesystemarealsodescribed.Thedesignandimplementationofthesub-sy
6、stemclientnodesarehighlighted,theoverallframework,therunningprocessofthesub-system,themainfunctionandimplementationmethodsofthecorealgorithmaredepictedindetail.ClientterminalsubsystemistestedinLANenvironment,mainlyincludingthetestingofthetimeofinitializingbuffer、play
7、backfreezefrequency,downloadanduploadrate.Thesystemshowsadvantagesoflowdelay,lowcostandhighefficiency,asprovedbyalargenumberofexperimentaldata,thetestresultsalsoshowthattheII万方数据ABSTRACTsystemmeetthedesignrequirementsbasically.Keywords:P2P,mediastreaming,live,datasch
8、eduleIII万方数据目录目录第一章引言........................................................11.1课题研究背景............................................