wifi简介.pptx
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wifi简介.pptx
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BriefintroductionofWiFiTechnology,1551100403王晓娜1551100404周子璇1551100405邱越,WhatisWiFi,ThecommonthingisawirelessrouterWIFI(WIreless-FIdelity)wirelessconnectionisatechnologythatcanconnectpersonalcomputers,handhelddevices(suchasPAD,mobilephone)andotherterminalsinwirelessway.Infact,itisahighfrequencyradiosignal.WirelessnetworkinthecategoryofWLANiswirelesscompatibilityauthentication,whichisessentiallyakindofcommercialauthentication,andisalsoawirelessnetworkingtechnology.,ThebackgroundofWiFi,ThefirstgenerationofWLANstandardslaunchedbyIEEEThetransmissionrateofthe2.4Gbandis1M,11b2.4Gband,thetransmissionrateisincreasedto5.5Mand11M11A5.8Gband,thetransmissionrateisincreasedto54M,Thetransmissionrateisraisedtothe54M2.4GbandCompatible11B,Thetransmissionrateof2.4Gbandand5.8Gbandisincreasedto300MCompatible11a/11b/11g,Thetransmissionrateofthefrequencybandand60Gbandbelow6Gisnotlessthan1Gbit/s,ThestructureofWiFi,Hardwareequipment1:
Communicationinterfaceaspect:
In2010,basicallytheformofUSBinterfaceisadopted.TherearealsoafewpartsofPCIEandSDIO.PCIEsmarketshareshouldbesmall,andthepriceofonetooneisexpensive,anditspracticabilityisnotstrong,somanyfunctionsofintegrationwillnotbeused.Infact,itisalsoawaste.2:
Powersupplyaspect:
Mostofthemuse5Vdirectpowersupply,andsomealsousethepowersharinginthemainboarddesign,directlyusing3.3Vpowersupply.3:
Antennaprocessingmode:
Itcanhavebuilt-inPCBboardantennaorceramicantenna;itcanalsoconnecttheantennaextensionlinethroughtheI-PEXjoint,andthenlettheantennabeoutside.,Networkprotocol1:
BasicServiceSet,BSS:
Themostbasicserviceunitofthenetwork.Thesimplestunitofservicecanbemadeupofonlytwosites.Asitecandynamicallyconnect(Associate)tothebasicserviceunit.2:
DistributionSystem,DS:
Theallocationsystemisusedtoconnectdifferentbasicserviceunits.Themediumusedbythedistributionsystem(Medium)iscompletelyseparatedfromthebasicserviceunitlogically,thoughphysicallytheymaybethesamemedium,suchasthesamewirelessband.3:
AccessPoint,AP:
Theaccesspointnotonlyhastheidentityofthecommonsite,butalsohasthefunctionofaccessingthedistributionsystem.,ThemaincharacteristicsofWiFi,ThecoverageofradiowavesisrelativelywideThespeedoftransmissionisveryfastandmeetstheneedsofpersonalandsocialinformation.ThedoorsillofthemanufacturerislowandthepriceoftheequipmentislowSmallsignalpowerWorkingattheIMSbandof2.4GHZ,globalunification,TheapplicationfieldofWiFi,Networkmedia:
Longdistancecalls(includinginternationallongdistance),webpages,email,musicdownloads,anddigitalphotosHandheld:
IntelligentmobilephoneDay-to-dayleisure:
Travel,officePassengertrainComfortstation,ThedevelopmentprospectofWiFi,1:
Fusion3GFromtheaspectsofcoverage,transmissionrate,basicbusinesscategory,mobilespeed,forwardexpansionandevolutiontrend,3GandWLANarecomplementaryrelationsthatcantakeadvantagesandavoiddisadvantages.NetworkarchitecturebasedonallIPSharingopenbusinessplatformandoperationsupportsystem,2:
ComplementarityofapplicationSpeechandVoWLANdataservicesunderwideareacoverageandareacoverageUtilizationofwirelesschannelresourceshandheldterminalandLaptop/PDAcombinationTheconnectionbetweenthemobilephoneandthecomputerisnolongerwired,andthewirelessisallabletodoit.,3:
BusinessoperationDirection1:
regionalelectronicmapDirection2:
personalizedPortalpagesDirection3:
LocationLocationDirection4:
advertisingforWi-FifreeDirection5:
buildattractivecontenttogether4:
Buildingmaterialunion5GembeddedWi-FimoduleapplicationvehiclenetworkConnectingvehiclestoreducetrafficaccidents,5:
CovertheworldMakingeverycorneroftheworldcoveredwirelessnetworkssoundslikeabeautifulidea,butanAmericantechnologycompanyisgoingtoturnitintoreality.ThecompanyisexpectedtolaunchhundredsofminisatellitestothenearearthorbitbyJune2015,whichwillcontinuouslyreleasethewirelessnetworksignalstotheearth,coveringallpartsoftheworld,anduseanyelectronicterminalstoconnecttothewirelessnetwork.,
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