Bluetooth专业英语论文.docx

Bluetooth专业英语论文.docx

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Bluetooth专业英语论文

Bluetooth

Abstract:

Bluetoothhasbeenthemostadvancedtechnologyinourworld.ButnotallofusknowwhatexactlyBluetoothis,howdoseBluetoothworkandwhatadvantageBluetoothhas?

Todayorinthefuture,Bluetoothwillbringusagreatmanyriches,soallofusshouldknowsomethingaboutBluetoothnow.Inmyacademicdiscourse,youwillknowmoreaboutBluetooth:

whyweneedBluetooth?

HowdoseBluetoothcomeout?

HowdoseBluetoothwork?

InwhataspectcanBluetoothbeused?

HowwillBluetoothdevelop?

Withallofthesequestions,letusreadthisdiscourseandgointotheBluetoothWorld.

Keyword:

Bluetooth蓝牙

cable电缆,海底电报,缆,索

frequency频率,周率,发生次数

mobilephones可移动电话，手机

microchip微芯片

synchronous同步的，同时的

IEEE电气和电子工程师协会

Broadband宽带

Wireless无线的

SNAPSmartNetworkAccessPoints（智能网络接入点）

PolyphonyServer复音服务器

ConstellationPartners星级伙伴

VirtualPrivateNetworks虚拟专用网

Ethernet以太网

Lookaroundyouatthemoment,youhaveyourkeyboardconnectedtothecomputer,aswellasaprinter,mouse,monitorandsoon.Whatjoinsallofthesetogether?

Ofcourse,theyareconnectedbycables.Cableshavebecomethebaneofmanyoffices,homesetc.Mostofushaveexperiencedthe'joys'oftryingtofigureoutwhatcablegoeswhere,andgettingtangledupinthedetails.Today,youwillnotbeworriedaboutthis,Bluetoothessentiallyaimstofixthis，itisacable-replacementtechnology.

ButwhatexactlyisBluetooth?

Wellitisn'tsomestrangeformoftoothdecayasyoumightinitiallyimagine.Bluetoothisthenameofanewtechnology,settocommerciallycomeoutinbulkaround2002.Itpromisestochangesignificantlythewayweusemachines.

BluetoothTechnology,whichwasconceivedinitiallybyEricsson,hasgainedthesupportofNokia,IBM,Toshiba,Intelandmanyothermanufacturerstoday.Beforebeingadoptedbythesecompanies,Bluetoothisastandardforasmall,cheapradiochiptobepluggedintocomputers,printers,mobilephones,etc.ABluetoothchipisdesignedtoreplacecablesbytakingtheinformationnormallycarriedbythecable,andtransmittingitataspecialfrequencytoareceiverBluetoothchip,whichwillthengivetheinformationreceivedtothecomputer,phonewhatever.Thatwastheoriginalidea,buttheoriginatorsoftheoriginalideasoonrealizedthatalotmorewaspossible.Theythought,ifyoucantransmitinformationbetweenacomputerandaprinter,whynottransmitdatafromamobilephonetoaprinter,orevenaprintertoaprinter?

TheprojectedlowcostofaBluetoothchip,anditslowpowerconsumption,meansyoucouldliterallyplaceoneanywhere.

HowdoesBluetoothworks?

Bluetoothusesashort-rangeradiolinkbuiltintoa9mmx9mmmicrochip.Theprotocolenablestheexchangeofinformationbetweenmanydevices,includingmobiletelephones,PDAs,notebookPCs,handheldPCs,associatedperipherals,andhomehubs,whichmayincludeHomeRF.Theradiowilloperateonthegloballyavailable2.45GHzISM"freeband,"meaningtherewillbenohindranceforinternationaltravelersusingBluetooth-enabledequipment.Bluetoothdoesnotrequirelineofsightforconnection,providedtheyarewithinoperationalrangeofotherBluetooth-enableddevices.TheBluetoothbasebandprotocolisacombinationofcircuit-andpacket-switching,makingitsuitableforbothvoiceanddata.Eachvoicechannelsupportsa64Kbit/ssynchronouslink,andtheasynchronouschannelcansupportanasymmetriclinkofupto721Kbit/sineitherdirection,whilepermitting57.6Kbit/sinthereturndirection.Allinall,thisisfastenoughtocopewiththevastmajorityofproposeddataratesovercellularsystems.Thenominallinkrangeis10cmto10m,butlinkscanbeextendedtomorethan100mbyincreasingthetransmitpower.ThesoftwareframeworkintheproposedspecificationwouldrequireBluetooth-compliantdevicestosupportabasiclevelofinteroperability.Thelevelofcompliancewillvarydependingonthedeviceapplication.

NowwecansaythatBluetoothhasalotofadvantage.1>Fastfrequencyhoppingavoidsinterference.2>Adaptiveoutputpowerminimizesinterference.3>Shortdatapacketsmaximizecapacityduringinterference.4>Fastacknowledgeallowslowcodingoverheadforlinks.5>CVSD（ContinuousVariableSlopeDeltaModulation）voicecodingenablesoperationathighbit-errorrates.6>Flexiblepackettypessupportswideapplicationrange.7>Airinterfacetailoredtominimizecurrentconsumption.BasicTechnicalInformation-Baseduponasmall,highperformanceintegratedradiotransceiver,eachofwhichisallocatedaunique48-bitaddressderivedformtheIEEE802.standard. 8>Operateintheunrestricted2.45GHzISMfreeband,Whichisavailablegloballyalthoughslightvariationoflocationandwidthofbandapply.9>Rangesetat10mtooptimizefortargetmarketofmobileandbusinessuser.10>Grossdatarate1Mbit/swithsecondgenerationplanstoincreaseto1Mbit/s.11>One-to-oneconnectionsallowmaximumdatatransferrateof721kbit/s（3voicechannels）.12>Usespacketswitchingprotocolbasedonfrequencyhopschemewith1600hops/senablehighperformanceinnoisyradioenvironments.Theentireavailablefrequencyspectrumidusedwith79hopsof1Mhzbandwidth,analogoustotheIEEE802.11standard.13>Lowpowerconsumptionlongevityforbatterypowereddevices.Duringdatatransferthemaximumcurrentdrainis30mA.Howeverduringpausesoratlowerdatarateswillbelover.

Becauseofallthethingswehaveinferredabove,alotofpeoplebecomeinterestedinBluetooth.WiththisviewpointinterestinBluetoothissoaring,lotsofideasareconstantlyemerging,somepracticalandfeasiblee.g.:

Bluetoothchipsinfreightcontainerstoidentifycargowhenalorrydrivesintoastoragedepot,oraheadsetthatcommunicateswithamobilephoneinyourpocket,orevenintheotherroom,otherideasnotsofeasible:

RefrigeratorcommunicatingwithyourBluetooth-enabledcomputer,informingitthatfoodsupplyislow,andtoinformtheretailerovertheinternet.IfwewanttoknowmoreaboutBluetooth,weshouldknowsomenewBluetoothProducts.TherearesomenewBluetoothProductshere,wecanseethebigadvantageithas.

1.TheRacewoodTechnologyCo.,Ltd.BluetoothheadsetRBTHS001.Itcanbeusedwithanyapplicationrequestingpersonalaudiothroughalightweight,easy-to-useandeasy-to-weardevice,offeringenhancedmobilitythroughtheuseoftruewirelesstechnology.TheRBTHS001allowsforthehostheadsettobewornandusedfreelyuptoadistanceof10metersfromtheconnectingdevice.Theheadsetcanbeoperatedandlinkedtotheaudiogatewayatmost3secondsafterbeingturnedon.

2.TheRacewoodTechnologyCo.,Ltd.UniversalClass1andClass2Bluetooth™USBDongleRBTPU001.Itiscompactandqualifiedmodulethatprovideacomplete2.4GHzBluetooth™systemforwirelessdataandvoicecommunications.TheRBTPU001includesanintegratedantennaandaUSBconnectorinterface,offeringasimpleBluetoothsolutionforelectronicdeviceswithaUSBinterface.

3.TheRacewoodTechnologyCo,LtdUniversalClass2Bluetooth

CompactFlashcardRBTCF001.ItisBluetoothv1.1compliantthatwillbeusedwithPersonalDigitalAssistantproductstoallowyoutowirelesslyconnectwithotherBluetooth-enableddevices.TheBluetoothCompactFlashcardcanplugintoPDA,handheldPCthroughaType1CompactCardslot,featuresaclass2radio,anintegralantennaandoperationrangeof10m.

TheBluetoothCompactFlashcardcanbeplug_and_playunderWindowsCEandPocketPC2000/2002operatingsystems.

UseBluetoothCompactFlashcardinyourPDA,pocketorhandheldPCtowirelesslysynchronizedatawithyourBluetoothPCorotherBluetoothdevice.Also,thissinglewirelessproductcanbeusedformanypurposes,whetherconnectingtotheInternetviaanaccesspointorsendingfilestoothers.

NowletustalkaboutthehotelandBluetooth.TherapidadoptionofBluetoothtechnologybythehotelindustrywouldappeartoprovideearlyevidenceofitspotential.However,therearemanyquestionsastotherealviabilityofwirelesssystemsinthisbusinessenvironment.Thehotelindustryisnotonethatyouwouldnormallyassociatewithleadingedge,hightechnology.However,inthisageoftheinternationalbusinesspark,thedemandsofthebusinesstravelersarechangingthefaceofhotelservices.Hotelscateringforbusinesstravelershaveflourishedandtokeepitsincreasinglyessentialbusinessclientele,thehotelindustryisembracingnewtechnologiestohelpdeliverincreasedservicestoguests.Theideaisarelativelysimpleone.Thereisasortofservicewargoingonandsomehotels,particularlythelargerchains,havegrownhungryfornewtechnologies.Thishungerismanifestingitselfinthetake-upofwirelesstechnologiesandinparticular,Bluetooth.

Themainreasoningbehindthisistoofferguestsservicessuchasemail,internetaccess,greaterin-hotelcontroloffacilities,andaccesstolocalattractioninformation,remotecheckinginorout,useofhotelprintingfacilitiesandsoon.Whileanyonecanseethatadditionalservicesinhotelscouldbeextremelybeneficialtothebusinesstravelersinparticular,giventhatBluetoothisstillanewtechnologythereremainsanairofuncertaintyaroundthevalidityofsuchservices.Andonequestionthatisalwaysthrownaboutwhenanewtechnologycomesalongiswhetherornotitistechnologyfortechnology'ssake.Thereareenoughworthyapplicationsaroundtosuggestthisisnotthecase,althoughthisisstillsomethingtobewaryof.Itisimportanttodecipherwhetherhotelsareembarkingonatechnologygameorifthereissomethingofrealvaluetohotelguestshere.

OnecompanythatisabouttoembarkonatrialofaBluetooth