文档介绍:西南交通大学硕士研究生学位论文第1I页AbsCractWitIltheimprovementoftrainspeedandthequantityofpassengerincreasing,howtoinformtrafficdepartmentsparametersabouttrai。ningoodtimeandreportvehicle—dispatchinginformationtotrainmansoastoguaranteesecurityoftrain’.。Basedonthis,—’andthendiscussingcharacteristicsoftheOn-m、unicationsystemindetail,basedonthis,protocolarchitectureoftheOn—,accordingtotheprotocolarchitectureoftheOn-municationsystem【,thearchitectureofhardwareandsoRwarefortheOn-municationsystemarebringedforward,,therelationsandthe:,munication啦studieddeeply,SMModem,basedonthis,munication-,paringadventageanddisadvantageofflowcontrolprotocolsconcerningData-Link-Layer,Go—back-NARQiSpresentedandusedasmethodofflowcontrolconcerningData-Link·,,franlelength,windowsize,,synthesizingthefeaturesofwiredandwirelessLAN’worksll'workstructureofOn·minucationsystem,alonewithadiscussionofproblemsonStOreandforwardswitching,enrolmentofconsumer,,designandrealizationofOn—,aftergivingstudyofGSMshortmessageservice,,includingshortmessagetransmissionandreception,andmanagementofshortmessage,andproblemonstoreandforwardswitchingofshortmessage,:workPmtocoI:municationSocket:StoreandForwardSwitching:ShortMessageService西南交通必学硕士研究生学位论戈第1徽第1章绪论{。I课怒的摄出及研究意