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1、ComputerNetworks55(2011)1242–1256ContentslistsavailableatScienceDirectComputerNetworksjournalhomepage:www.elsevier.com/locate/comnetLANC:Locality-awarenetworkcodingforbetterP2Ptrafficlocalizationa,⇑aa,b,⇑⇑GuoqiangZhang,GuoqingZhang,SuqiChengaInstituteofComputingTechnology,ChineseAcadem
2、yofSciences,Beijing,ChinabGraduateUniversityofChineseAcademyofSciences,Beijing,ChinaarticleinfoabstractArticlehistory:AsISPsbegintocooperatetoexposetheirnetworklocalityinformationasservices,e.g.,Received8April2010P4P,solutionsbasedonlocalityinformationprovisionforP2Ptrafficlocalization
3、willsoonReceivedinrevisedform28October2010approachtheircapabilitylimits.Anaturalquestionis:canwedoanybetterprovidedthatAccepted5November2010nofurtherlocalityinformationimprovementcanbemade?Thispapershowshowtheutil-Availableonline7December2010ityoflocalityinformationcouldbelimitedbycon
4、ventionalP2Pdataschedulingalgo-ResponsibleEditor:I.F.Akyildizrithms.Evensophisticateddataschedulingalgorithmssuchasthelocalrarestfirstcouldnottakefulladvantageofthelocalityinformation.Keywords:Networkcoding’ssimplifieddataschedulingmakesitcompetentforimprovingP2PLocality-awarenetworkcod
5、ingP2Ptrafficlocalizationapplication’sthroughput.However,itspotentialforP2PtrafficreductionhasnotbeenfullyNetworkcodingrecognized.Thispaperproposesthelocality-awarenetworkcoding(LANC)thatuseslocal-Locality-awarenessityinformationinboththetopologyconstructionanddownloadingdecision,anddem
6、on-BeyondP4Pstratesitsexceptionalabilityforinter-domainP2Ptrafficreduction.Therandomizationintroducedbynetworkcodingenhancesthechanceforapeertofindinnovativeblocksinitsneighborhood.Aidedbyproperlocality-awareness,theprobabilityforapeertogetinnovativeblocksfromitsproximitywillincreaseasw
7、ell,resultinginmoreefficientuseofnetworkresources.ExtensivesimulationresultsshowthatLANCcansignificantlyreduceinter-domainP2Ptrafficwithoutsacrificingapplication-levelperformance.Aidedbythesamelocalityknowledge,theinter-domaintrafficofLANCinmostcasesarelessthan50%ofthecurrentbestapproachth
8、atdoe
