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《基于GPRS遠(yuǎn)程監(jiān)控系統(tǒng)數(shù)據(jù)終端的研究-外文翻譯》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、外文：Long-distancesupervisorysystemdataterminalresearchBasedonGPRS1introductionWiththedevelopmentofcomputertechnology,Internettechnologyisparticularlyextensiveandin-depthvariousaspectsofpeople'slives.makepeople'sliveshasundergoneaprofoundchange.Asindustrialareas,becauseoftheneedtocontrolareas,mon
2、itoringofawiderangeofobjects,hencetheneedtospendalotofmanpower,materialandfinancialresourcesforequipmentmaintenance.Moreover,therearemanyadverseconditions,itisnoteasytostaytheoccasionalmomentofarrivalornotsomefielddatacollection.Iftheamountofwiringworkitisnottheeconomy,isunreasonable.Thishashel
3、pedwirelesscommunicationstechnologydevelopmentinthefieldofremotemonitoring.GPRS(GeneralPacketRadioService),astheexistingGSMnetworkevolutionofthetransitiontothethirdgenerationmobilecommunicationtechnologyfor(2.5G),withrapidaccess,alwaysonline,sobytheflowmeterfeaturesRemotereal-timedatatransmissi
4、oninasuddenunmatchedadvantages.2GPRStechnologyGPRS(GeneralPacketRadioService)isbasedontheGSMmobilenetworksystems,theuseofpacketswitchingtechnology,compatiblewithGSM,andhigh-speeddatatransmissionnetworks,GPRSintheGSMnetworktointroduceatraditionalthreenewcomponents:PCU(PacketControlUnit,acontrolu
5、nit).SGSN(ServingGPRSSupportNode.GPRSservicenodesupport)andGGSN(GatewayGPRSSupportNode.GatewayGPRSsupportnode)withthefollowingcharacteristics:ThehighutilizationrateofresourcestotheintroductionoftheGPRSpacketswitchingmodeoftransmission,Onlyuserssendorreceivedataonlyduringtheoccupationofresources
6、Thismeansthatmanyuserssharethesamewirelesscommunicationsandhighefficiency,therebyincreasingtheutilizationofresources.9GSMcircuitswitcheddatatransmissionmethodsandmodelsfortheentirelinkperiod,WhetheruserstransmitdataalonewilloccupyChannel.GPRS用戶的計(jì)費(fèi)按通信的數(shù)據(jù)流量為計(jì)費(fèi)標(biāo)準(zhǔn)。GPRSBillingusersbytheflowofdatacom
7、municationsfortheaccountingstandards.GPRSdatatransmissionspeedofhigh-speedtransmission57.6KB/s.thehighestattainable115-117.2kb/sfullymeetuserneeds.AccesstowaitforashorttimeGPRSaccesstimeisshort,fastconnectivity,theaverage2s.Online
