移动互联网的关键技术研究

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1、华南理工大学博士学位论文移动互联网的关键技术研究姓名：徐艳申请学位级别：博士专业：电路与系统指导教师：尹俊勋20030401ABSTRACTDependingontheTCP／IPprotocol，theMobileInternetconnectsa11theworldwidenetworksintoaglobalincompactnetwork．Whatevertheconnectionmodeiswireorwireless，theterminalcanaccesstotheservertocommunicatewithanotherterminalinthenetworkift

2、heIPaddressisvalid．Whentheterminalhandoversbetweendifferentareas，howtokeepthecommunicationcontinuousandrealizetheQoSperformanceistheheattopicintheindustries．NowadaysmanyschemesarepresentedtosurpportthemobileIP,suchastheschemebasedonthelinklayer，theschemebasedonthenetworklayerortheschemebasedont

3、heapplicationlayer．Aftertheanalysisanddiscussion，thispaperchoosestheschemebasedonthenetworklayertosurpporttheterminal’S(node’S)mobilecommunication．Howtoreducethehandover’Slatencyandlightenthenetwork’Spayloadarethekeyfeaturesoftheprotoc01．Inordertosupporthandover,IETFpresentsMIPproposal，andmanyp

4、roposalsarepresentedaccordinglysuchas‘thetrianglerouting’，‘theroutingoptimization’whichhastheshortcomingsoftheunbalancednetwork’Spayload，andthevulnerablesecurity．Inthispaper，withtheschemeof‘node·basedroutingproposalinthemiddleorsmall—scalednetwork’，terminalhastwoidentities：terminalandpermanenth

5、omeagent，withmobilenode’Spermanentagentaddress，thecorrespondingnodecanrealizemobilecommunicationandreducethehandover’Slatencyeffectively．Thisnotonlycanlightenthehomeagent’Spayloadeffectively，butalsocanguaranteethesafetyofthelocationinformationofthemobilenode．Butitshouldbenotedthattheaddingaddre

6、ssestotheterminalwillcontributethreattothelimitedaddressspacewhentheterminalisitspermanenthomeagent，SOthisSChemeisonlyusedinthemiddleorsmall—scalednetworkwhichsupports‘flooding’．Inthispaper，withtheproposalof‘MBG—basedroutingoptimization’，MBGinterceptstheinformationofregistration，getsthecare-of-

7、addressandcreatesthemobilenode’Sbindingcache．Itcanreducethehandover’Slatencytoprovidetheserviceofrealtimecommunicationwiththeprecedentofinputtingthenodeandhomeagent’Saddressesinadvanced．Webuildonthenetworkwiththedevicesanddosomeex