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计算机网络专业英语 课件 Lesson 5 Internet of Things and Electronic Commerce.pptx

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L5-1

Lesson5InternetofThingsandElectronicCommerceText1InternetofThings

要点KeyPoints:IoT、M2M、CPSThing/item/objectAutonomous/automaticEmbedded/built-inSensor/actuatorIn……senseVarious/inavariety

TheInternetofThings(IoT)isthenetworkofphysicalobjects,suchasdevices,vehicles,buildingsandotheritemswhichareembeddedwithelectronics,software,sensors,andnetworkconnectivity,whichenablestheseobjectstocollectandexchangedata.TheInternetofThingsallowsobjectstobesensedandcontrolledremotelyacrossexistingnetworkinfrastructure,creatingopportunitiesformore-directintegrationbetweenthephysicalworldandcomputer-basedsystems,andresultinginimprovedefficiency,accuracyandeconomicbenefit.WhenIoTisaugmentedwithsensorsandactuators,thetechnologybecomesaninstanceofthemoregeneralclassofcyber-physicalsystems(CPS),whichalsoencompassestechnologiessuchassmartgrids,smarthomes,intelligenttransportationandsmartcities.EachthingisuniquelyidentifiablethroughitsembeddedcomputingsystembutisabletointeroperatewithintheexistingInternetinfrastructure.ExpertsestimatethattheIoTwillconsistofalmost50billionobjectsby2020.物联网,又称传感网,指的是将各种信息传感设备,如射频识别装置、红外感应器、全球定位系统、激光扫描器等种种装置与互联网结合起来而形成的一个巨大网络,其目的是让所有的物与物都通过网络连接在一起,方便识别和管理。thing、item和object都是用于泛指的词,类似于事物、东西、事项(item)等,可以是抽象逻辑(logical)上的,也可以是具体物理上(physical)的。Anobjectisaphysicalitem.Itmeanssomethingyoucantouch.Ashirtisanobject,butanideaisnotanobject.Athingcanbeanything.Aphysicalobject,anidea,asituation.

BritishentrepreneurKevinAshtonfirstcoinedthetermin1999whileworkingatAuto-IDLabs(originallycalledAuto-IDcenters),referringtoaglobalnetworkofRadio-frequencyidentification(RFID)connectedobjects.Typically,IoTisexpectedtoofferadvancedconnectivityofdevices,systems,andservicesthatgoesbeyondmachine-to-machinecommunications(M2M)andcoversavariet

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