6版 Project 18 课文及翻译

电子与通信技术专业英语电子信息工程学院Project185GNetwork5GNetwork5Gisthefifthgenerationmobilenetwork.Itisanewglobalwirelessstandardafter1G,2G,3G,and4Gnetworks.5Genablesanewkindofnetworkthatisdesignedtoconnectvirtuallyeveryoneandeverythingtogetherincludingmachines,objects,anddevices(asshowninFig.18-1).5G网络5G是第五代移动网络。它是继1G，2G，3G和4G网络之后的新的全球无线标准。5G启用了一种新型网络，该网络旨在将几乎每个人和所有事物（包括机器，物体和设备）连接在一起(如图18-1所示)。5Gisnextgenerationwirelessnetworktechnologythatisexpectedtochangethewaypeopleliveandwork.ltwillbefasterandabletohandlemoreconnecteddevicesthantheexisting4GLTEnetwork,improvementsthatwillenableawaveofnewkindsoftechproducts.5Gwillhavegreaterbandwidth,meaningitcanhandlemanymoreconnecteddevicesthanpreviousnetworks.Anditwillenableevenmoreconnecteddeviceslikesmarttoothbrushesandself-drivingcars.5G是下一代无线网络技术，有望改变人们的生活和工作方式。与现有的4GLTE（长期演进）网络相比，5G速度更快，并且能够处理更多的连接设备，这些改进将催生一波新型技术产品。5G将具有更大的带宽，这意味着它可以处理比以前的网络更多的连接设备。它将启用更多连接的设备，例如智能牙刷和自动驾驶汽车。

5Gwillalsoreducelatency—thetimeittakesforacellphone(orotherconnecteddevice)tomakearequestfromaserverandgetaresponse—tovirtuallyzero.Anditwillmakecommunicationwithcloudplatforms(thinkAmazonWebServicesandMicrosoftAzure)fasterandeasier.5G还将手机（或其他连接的设备）从服务器发出请求并获得响应所需的时间减少到几乎为零。使得与云平台（如MicrosoftAzure）的通信变得更快，更轻松。Broadlyspeaking,5Gisusedacrossthreemaintypesofconnectedservices,includingenhancedmobilebroadband,mission-criticalcommunications,andthemassiveloT.Adefiningcapabilityof5Gisthatitisdesignedforforwardcompatibility—theabilitytoflexiblysupportfutureservicesthatareunknowntoday.从广义上讲，5G可用于三种主要的连接服务类型，包括增强型移动宽带，关键任务通信和大规模物联网。5G的一项定义功能是为前向兼容性而设计，即能够灵活支持当今未知的未来服务的能力。Enhancedmobilebroadband:Inadditiontomakingoursmartphonesbetter,5GmobiletechnologycanusherinnewimmersiveexperiencessuchasVRandARwithfaster,moreuniformdatarates,lowerlatency,andlowercost-per-bit.增强型移动宽带：除了使我们的智能手机变得更好之外，5G移动技术还可以带来新的沉浸式体验，例如具有更快、更统一的数据速率、更低的延迟和更低的每比特成本的VR和AR。Mission-criticalcommunications:5Gcanenablenewservicesthatcantransformindustrieswithultra-reliable,available,low-latencylinkslikeremotecontrolofcriticalinfrastructure,vehicles,andmedicalprocedures.关键任务通信：5G可以实现新服务，这些服务可以通过超可靠、可用、低延迟的链接来改变行业，例如远程控制关键基础设施、车辆和医疗程序。MassiveIoT:5Gismeanttoseamlesslyconnectamassivenumberofembeddedsensorsinvirtuallyeverythingthroughtheabilitytoscaledownindatarates,power,andmobility—providingextremelyleanandlow-costconnectivitysolutions.大规模物联网:5G旨在通过降低数据速率、功率和移动性的能力，无缝连接几乎所有事物中的大量嵌入式传感器，从而提供极其精简和低成本的连接解决方案。With5G,signalsrunovernewradiofrequencies,whichrequiresupdatingradiosandotherequipmentoncelltowers.Therearethreedifferentmethodsforbuildinga5Gnetwork,dependingonthetypeofassetsawirelesscarrierhas:low-bandnetwork(widecoverageareabutonlyabout20%fasterthan4G),high-bandnetwork(superfastspeedsbutsignalsdon’ttravelwellandstruggletomovethroughhardsurfaces)andmid-bandnetwork(balancesspeedandcoverage).使用5G，信号在新的无线电频率上运行，这需要更新蜂窝塔上的无线电和其他设备。根据无线运营商拥有的资产类型，有三种不同的构建5G网络的方法：低频带网络（覆盖范围广，但仅比4G快20％）、高频带网络（速度超快，但信号不能很好地通行并且很难穿过坚硬的表面）和中频网络（平衡速度和覆盖范围）。Carriersbuildingsuperfast5Gnetworksmustinstalltonsofsmallcellsitestowallsortowers,ofteninrelativelysmallproximitytooneanother.Forthatreason,superfastnetworksaremostlybeingdeployedcitybycity.Eventually,mostcarrierswillhaveamixofthedifferentnetworktypesthatwillenablebothbroadcoverageandfastspeeds.建立超高速5G网络的运营商必须在墙壁或塔架上安装大量的小型蜂窝站点，通常彼此之间的距离相对较小。因此，超高速网络大多一个城市接一个城市地部署。最终，大多数运营商将混合使用不同的网络类型，从而实现广泛的覆盖范围和更快的速度。Thefastest5Gnetworksareexpectedtobeatleast10timesfasterthan4GLTE,accordingtowirelessindustrytradegroupGSMA.Someexpertssaytheycouldeventuallybe100timesfaster.That’sfastenough