基于gprs远程监控系统数据终端的研究-外文翻译

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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