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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、夕卜文：Long-distancesupervisorysystemdataterminalresearchBasedonGPRS1introductionWiththedevelopmentofcomputertechnology,Internettechnologyisparticularlyextensiveandin-depthvariousaspectsofpeople’slives,makepeople’sliveshasundergoneaprofoundchange.Asindustrialareas，becauseofth
2、eneedtocontrolareas，monitoringofawiderangeofobjects，hencetheneedtospendalotofmanpower,materialandfinancialresourcesforequipmentmaintenance.Moreover，therearemanyadverseconditions，itisnoteasytostaytheoccasionalmomentofarrivalornotsomefielddatacollection.Iftheamountofwiringwo
3、rkitisnottheeconomy,isunreasonable.Thishashelpedwirelesscommunicationstechnologydevelopmentinthefieldofremotemonitoring.GPRS(GeneralPacketRadioService)，astheexistingGSMnetworkevolutionofthetransitiontothethirdgenerationmobilecommunicationtechnologyfor(2.5G)，withrapidaccess
4、，alwaysonline，sobytheflowmeterfeaturesRemotereal-timedatatransmissioninasuddenunmatchedadvantages.2GPRStechnologyGPRS(GeneralPacketRadioService)isbasedontheGSMmobilenetworksystems,theuseofpacketswitchingtechnology，compatiblewithGSM，andhigh-speeddatatransmissionnetworks,GPR
5、SintheGSMnetworktointroduceatraditionalthreenewcomponents:PCU(PacketControlUnit,acontrolunit).SGSN(ServingGPRSSupportNode.GPRSservicenodesupport)andGGSN(GatewayGPRSSupportNode.GatewayGPRSsupportnode)withthefollowingcharacteristics:Thehighutilizationrateofresourcestotheintr
6、oductionoftheGPRSpacketswitchingmodeoftransmission,OnlyuserssendorreceivedataonlyduringtheoccupationofresourcesThismeansthatmanyuserssharethesamewirelesscommunicationsandhighefficiency，therebyincreasingtheutilizationofresources.GSMcircuitswitcheddatatransmissionmethodsandm
7、odelsfortheentirelinkperiod，WhetheruserstransmitdataalonewilloccupyChannel.GPRSBillingusersbytheflowofdatacommunicationsfortheaccountingstandards.GPRSdatatransmissionspeedofhigh-speedtransmission57.6KB/s.thehighestattainable115-117.2kb/sfullymeetuserneeds.Accesstowaitforas
8、horttimeGPRSaccesstimeisshort,fastconnectivity，theaverage2s.Onlineuserswillprovidereal-ti
