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1、TheComputerJournalAdvanceAccesspublishedMay11,2007#TheAuthor2007.PublishedbyOxfordUniversityPressonbehalfofTheBritishComputerSociety.Allrightsreserved.ForPermissions,pleaseemail:journals.permissions@oxfordjournals.orgdoi:10.1093/comjnl/bxm013ALayer-2FrameworkforInterconnecting
2、AdHocNetworkstoFixedInternet:Test-bedImplementationandExperimentalEvaluationE.ANCILLOTTI1,R.BRUNO2,*,M.CONTI2,E.GREGORI2ANDA.PINIZZOTTO21DepartmentofInformationEngineering,UniversityofPisa,Italy2IITNationalResearchCouncil(CNR),ViaG.Moruzzi1,56124Pisa,Italy*Correspondingauthor:
3、r.bruno@iit.cnr.itItiswidelyrecognizedthataprerequisiteforthecommercialpenetrationoftheadhocnetworkingtechnologiesistheintegrationwithexistingwired/wirelessinfrastructure-basednetworkstoprovideaneasyandtransparentaccesstotheInternetanditsservices.However,mostoftheexist-ingsolu
4、tionsforenablingtheinterconnectionbetweenIPv4-basedmobileadhocnetworksandtheInternetarebasedoncomplexandinefficientmechanisms,asMobile-IPandIPtunnelling.Inthispaper,wedescribeanalternativeapproachtobuildmulti-hopandheterogeneousproactiveadhocnetworks,whichcanbeusedasflexibleandl
5、ow-costextensionsoftraditionalwiredlocalareanet-works(LANs).OurproposedarchitectureprovidestransparentglobalInternetconnectivityandaddressautoconfigurationcapabilitiestomobilenodeswithoutrequiringconfigurationchangesinthepre-existingwiredLAN,andrelyingonbasiclayer-2functionaliti
6、es.WehaveprototypedthecorecomponentsofthisarchitectureforOptimizedLinkStateRouting-basedadhocnetworksandwehaveconductedseveralexperimentscomparingthethroughputperformanceobtainedusingourschemeandawell-knownalternative(networkaddresstranslation)NAT-basedsolution.Theexperimental
7、outcomesshowthatourproposedtechniqueensureshigherperconnectionthrough-putsthantheNAT-basedsolutionintheconsiderednetworkscenarios.Keywords:Adhocnetwork,Internetaccess,OLSR,ExperimentalevaluationReceived27July2006;revised7March20071.INTRODUCTIONimportantfeaturesneededtofosterth
8、ecommercialpene-Amobileadhocnetwork(MANET)isacollectionofmobi
