p2p網絡中基于超級節(jié)點監(jiān)控的搭便車抑制模型

1、河北大學碩士學位論文P2P網絡中基于超級節(jié)點監(jiān)控的搭便車抑制模型姓名：楊李丹申請學位級別：碩士專業(yè)：計算機應用技術指導教師：田俊峰20100501AbstractIIAbstractWiththerapiddevelopmentofIntertheapplicationofP2Ptechnologyismemeextensivethescaleofthewkislargerthaneverbefe.Therefetheproblemof

2、fairresourcessharinginpeertopeersystemhasbecomememeserious.P2PisoneofthemostpopulartechnologiesintheInter.Itprovidesanopenfreefileexchangeenvironment.ThesefeaturesmakeaconsiderableptionofpeersinP2Pwksonlyobtainservicespr

3、ovidedbyothersbutnotcontributetothewholesystem.Thisselfishbehaviofpeersiscalledfreeridingtheselfishpeersareregardedasfreeriders.FreeridingisagreatchallengetoP2Psystems.Itisaseverethreattotheavailabilityqualityofserviceex

4、pabilityrobustnessofP2Pwk.IfthisphenomenonistoorampanttheentireP2Psystemmayevencollapseeventually.TherefetherationalP2Papplicationdevelopersshoulddevelopsomeantifreeridingmeasurestodealwithit.Inthispaperweproposeasuperno

5、demonitingbasedmechanism(SNMM)againstfreeridingthatwillalleviatetheproblemsassociatedwithfreeridingmakeP2Pwkmerobuststable.(1)AccdingtothebehavifunctionofnodestheP2PwkisabstractedtobeaSuperNodehierarchicalstructuretomoni

6、tthebehavisofnodesfocusingonavoidingdishonestbehavismalignantcheating.(2)Thenumberofusersisusedasthepremisetotriggerthemechanismindertofacilitatethebusinessapplicationsonthewk.(3)ThedefinitionofEnjoyServiceAbilityisinvol

7、vedtomeasurethecontributionofpeerstothewholesystemwhichisbasedonthenumberofprovidedfilesthesizeofprovidedfilesthequalityofprovidedfiles.(4)Nodesarerewardpunishedbydistributingmaintainingapermitmechanism.(5)Provideservice

8、AvailabilityFeedbackCredibilityisimptedtoguaranteethequalityofservices.(6)ProposeaschemetocombatWhitewashingproblem.Finallythesimulationresultsverifytheeffectivenessfeasibilityofthismodel.KeywdsFreeridingIncentivemechani