IPv6在无线网路上之应用课件.ppt

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1、IPv6在無線網路上之應用黃仁竑中正大學通訊系主任中正大學資工系教授OutlineCharacteristicsofIPv6WirelessnetworksIPv6overwirelessnetworksApplicationsCharacteristicsofIPv6WhatmakesitdifferentfromIPv4(features)AddressspaceAddressstatelessautoconfigurationSecurityMobilityQoSIPv6AddressSpaceLargeaddressspace128-b

2、itaddress64-bitnetworkaddress64-bitnetworkinterfaceaddressAccommodate1.8E+19networksassumingIPv4efficiency:1E+16networks,1millionnetworksperhuman2networkspersquarefeetofEarth(20persquaremeter)Whatisthepoint?ArewelackofIPaddress?NATisbadformanyapplications(VoIP,FTP,SNMP,…)Sta

3、telessAutoconfigurationGeneratelink-localaddress(FE80:)(tentativeaddress)Joinall-nodemulticastgroup&solicited-nodemulticastgroupDAD:sendneighborsolicitationmessagewithtentativeaddressFindroutersandprefix:sendroutersolicitationmessageRoutersreplywithrouteradvertisementmessage

4、(autonomousflagisset,prefix+interfaceidisthenewaddr)IPv6SecurityIPsecEncryptionESP(EncapsulatingSecurityPayload)AuthenticationAH(AuthenticationHeader)KeymanagementInternetSecurityAssociationandKeyManagementProtocol(ISAKMP)MandatoryEnd-to-endIPv6MobilityComponentsMN(MobileNod

5、e)HA(HomeAgent)CN(CorrespondentNode)ImportantfeaturesCare-ofaddress(COA):obtainedataforeignsubnet,MNmayhavemorethenoneCOA(autoconfiguration)Binding:associationbetweenhomeaddressandCOAMNsendsBindingUpdatetoHAandCNsRouteoptimizationPacketsaresentfromCNtoCOAofMN(CNcachebinding)

6、SecurityonbindingupdateMNCNHAIPv6QoSInternetQoSframeworksIntegratedServicesDifferentiatedServicesIPv6QoSFlowlabel(IntServ)Trafficclass(DiffServ)All-IPnetworks(B3G)IntServ+DiffServEnd-to-endQoSQoSmappingDifferentQoSprovisionin3G,WLAN,Bluetooth,InternetWirelessNetworks無線廣域網路WW

7、AN(WirelessWideAreaNetwork)全球性、跨地區、大範圍網路無線區域網路WLAN(WirelessLocalAreaNetwork)建築物內、一百公尺左右範圍之無線網路無線個人網路WPAN(WirelessPersonalAreaNetwork)個人活動、十公尺左右範圍內之無線網路WPAN-Bluetooth建構個人行動網路(PersonalAdHocNetwork)提供一個通行全世界的無線傳輸環境,連結所有行動設備之間的資料傳輸服務行動電話手機、無線電話、筆記型電腦、PDA、數位相機、數據機、印表機、投影機、區域網路Blu

8、etoothandInternet連接Bluetooth與InternetViaAccesspointViamobilephoneViaPSTNpho