Lesson11BluetoothKeywords■Bluetooth藍(lán)牙■Destination目的地■Convenience方便■Technology技術(shù)■Exchange交換■Equipment設(shè)備■Standard標(biāo)準(zhǔn)■Frequency頻率■Bandwidth帶寬■Piconet微微網(wǎng)■Electronic電子的■Analogous相似的，相同的■Device設(shè)備■Application應(yīng)用■Interface接口■Radio射頻■Protocol協(xié)議■Spectrum譜■Infrastructure基礎(chǔ)設(shè)施■License許可證■Numerous許多的■Simultaneously同時(shí)■Pave鋪，鋪滿■Frequencyhopping頻率跳躍■工作任務(wù)：鼠標(biāo)、鍵盤、打印機(jī)、膝上型計(jì)算機(jī)、耳機(jī)和揚(yáng)聲器等怎樣在PC環(huán)境中無線使用的？辦公室之間怎樣用無線網(wǎng)絡(luò)實(shí)現(xiàn)對(duì)話？■學(xué)習(xí)目標(biāo)：掌握藍(lán)牙技術(shù)的概念和技術(shù)特征■重點(diǎn)難點(diǎn)：藍(lán)牙技術(shù)的技術(shù)特征■推薦學(xué)時(shí)：6學(xué)時(shí)1：WhatisBluetoothTechnology?Bluetoothtechnologysupportsshortcommunication(within10meters).Itcanrealizethewirelessinformationexchangeamongthemobilephone,wirelessheadsetsandotherrelatedequipment.IEEE802.15isthetechnicalstandard,theoperatingfrequencybandis2.4GHz,thebandwidthis1Mb/s.Bluetoothtechnologyisauniversalradiointerfaceinthe2.45GHzfrequencybandthatenablesportableelectronicdevicestoconnectandcommunicatewirelesslyviashort-range,adhocnetwork.Eachunitcansimultaneouslycommunicatewithuptoseveralotherunitsperpiconet.Moreover,eachunitcansimultaneouslybelongtoseveralpiconets.BluetoothtechnologywhichapartfromEricsson,hasgainedthesupportofNokia,IBM,Toshiba,Intelandmanyothermanufactures,eliminatestheneedforwires,cablesandconnectorsforandbetweencordlessormobilephones,modems,headsets,PDAs,computers,printers,projectors,localareanetworks,andsoon,andpavesthewayfornewandcompletelydifferentdevicesandapplications.2：WhatarethecharacteristicsofBluetoothtechnology?·1Ms/ssymbolrateexploitsmaximumavailablechannelbandwidth;·Fastfrequencyhoppingavoidsinterference;·Adaptiveoutputpowerminimizesinterference;·Shortdatapacketsmaximizeinterference;·Fastacknowledgeallowslowcodingoverheadforlinks;·Flexiblepackettypessupportwideapplicationrange;·Airinterfacetailoredtominimizecurrentconsumption;·CVSD(continuousvariableslopedeltamodulation)voicecodingenablesoperationathighbiterrorrates.3：ThebasictechnicalinformationandapplicationBluetoothtechnologyisfreeforallthepeople.Itworksin2.4GHzbandwithoutlicensing,andcanbeusedinindustrial,technology,medicine(ISM).Theproductsintegratedthetechnology,frommobilephones,carstothemedicalequipment,moreover,theusersfromconsumers,industrialmarketstoenterprises,aretoonumeroustomentiononebyone.Bluetoothisanimmediatetechnique,itdoesnotrequirearegularinfrastructure,andeasyt