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1、WirelessInternetoverHeterogeneousWirelessNetworks*GangWu,PaulJ.M.Havinga,MitsuhikoMizunoCommunicationsResearchLaboratory,3-4Hikarino-oka,Yokosuka,239-0847Japan{g-wu,mizuno}@crl.go.jp*UniversityofTwente,theNetherlandsAbstract-Oneofthetwokeywordsforthenextgenerationwire-100Mbpsinavehicul
2、arenvironmentbytheyear2010andthelesscommunicationsisseamless.Beinginvolvedintheessentialkeytechnologiesonseamlessintegrationofvariouswirelesse-JapanPlanpromotedbytheJapaneseGovernment,MIRAIaccesssystemsforpracticalusein2005.TheMIRAI(Japa-(MultimediaIntegratednetworkbyRadioAccessInnovat
3、ion)neseforfuture,andanacronymof‘MultimediaIntegratedprojectisresponsiblefortheresearchanddevelopmentonthenetworkbyRadioAccessInnovation’)attheCommunica-seamlessintegrationofvariouswirelessaccesssystemsforthetionsResearchLaboratoryisoneoftheJapanesenationalpracticalusebytheyear2005.Ahe
4、terogeneousnetworkarchi-projectsinvolvedinthee-JapanPlanforseamlessintegrationtectureincludingacommontool,acommonplatform,andaofheterogeneouswirelesssystems.commonaccessisproposedinthispaper.Concretely,soft-ware-defined-radiotechnologiesareusedtodevelopaTable1Variouswirelessaccesssyste
5、msespeciallyinJapan.multi-serviceuserterminaltobeusedforaccesstodifferentMobilitywirelessnetworks.ThecommonplatformforvariouswirelessStaticPedestrianVehiclenetworksisbasedonawirelesssupportingIPv6network.Aba-Frequencysicaccessnetwork,separatedfromotherwirelessaccessnet-<1GHz2Gcellularw
6、orks,isusedasameansforwirelesssystemdiscovery,signal-2-waypager,MCAingandpaging.Aproof-conceptexperimentaldemonstration1to3GHzWLAN(802.11b),PHS,DECT2G/3Gcellular,LEOsystemwillbeavailableinMarch2002.Bluetooth,WPAN,VSATI.INTRODUCTION3to20GHzWLAN(802.11a).BRAN,4Gcellular,ITSAsthesecondgen
7、erationmobilecommunicationservicesBRAN,HiSWANaHiSWANahavebeenexplosivelyexpandedworldwidesincethelateUpto60GHzFWA,mm-waveHAPS,ITS,HAPS1980s,anumberofwirelesscommunicationsystemssuchasWLAN,HAPS,HiSWANbIEEE802.11a/bwirelessLAN,Bluetooth,IMT-2000,fixedHiSWANbwirelessaccess(FWA)andsoonar
