网优试题2(英语选择153)

11.Whichcellplanisdesignedfirstandisthebasisforfutureplanning?EA.FinalB.PreliminaryC.BaseCoverageD.InitialE.Nominal2.Whatisthenameofthetypeoffadingwhichisduetoshadowing?DA.AtmosphericfadingB.Multi-pathfadingC.RayleighfadingD.LogNormalfadingE.Pathloss3.Whichunitisusedformeasuringtraffic?AA.ErlangB.Bit/secondC.HertzD.Subscribers/kHzE.Subscribers/minute4.Whattypeofinterferenceisproducedbyothertransmittersonthesamefrequency?BA.DoubleinterferenceB.Co-channelinterferenceC.AdjacentchannelinterferenceD.ReflectedinterferenceE.Timinginterference5.WhatdoesGradeofService(GoS)mean?DA.NumberofavailablesubscriberservicesB.Numberofsuccessfulcallset-ups2C.ChannelutilizationD.Numberofunsuccessfulcallset-upsduetocongestionE.Numberofdroppedcalls6.Whichcellpatternisrecommendedforusewithfrequencyhopping?BA.4/12B.3/9C.7/21D.7/7E.Noneofthese7.Whichofthefollowingisnotnecessarytoconsiderwhensurveyingapotentialsite?AA.FrequencyallocationB.SpaceforantennasC.ElectricalpoweravailabilityD.ContractwithownerE.AvailabilityoftransmissiontotheBSC8.Whatisusedtoprevent“theping-pongeffect”,thatis,rapid,consecutivehandovers?CA.DynamicpowercontrolB.FrequencyhoppingC.HysteresisD.CellloadsharingE.Discontinuoustransmission9.Whichofthefollowingwillnotincreasesystemcapacity?BA.Increasingthenumberofavailablefrequencies.B.Changingthemodulationscheme.C.ImplementinghalfratevocodersD.Goingfroma4/12toa3/9reusepattern.3E.Splittingcells.10.Whichofthefollowingisusedforplanningnetworkdimensioning,frequencyplanning,andmakingcoverageandinterferencepredictions?BA.ChannelEventRecording(CER)B.TEMScellplannerC.TEstMobileSystem(TEMS)D.CellularNetworkAdministrationE.CellularNetworkAnalyzer(CeNA)11.Whichcellplanisdesignedfirst,andisthebasisforfutureplanning?DA)BaseCoverageB)FinalC)PreliminaryD)NominalE)Ultimate12.WhatisthedifferencebetweenGSMandCME20/CMS40?EA)CME20/CMS40areGSM-systemswithEricsson’smobilestations.B)CME20/CMS40areGSMsystemswith,atleast,halfoftheequipmentcomingfromEricsson.C)CME20/CMS40arenewrevisionsofGSM.D)GSMistheFrenchversionofCME20/CMS40.E)CME20/CMS40areEricssonimplementationsofGSM.13.HowmanyARFCNscananoperatoruseifallocated15MHzuplinkand15MHzdownlink(minusoneforguardband)?EA)14ARFCNsB)15ARFCNsC)29ARFCNsD)75ARFCNsE)74ARFCNs14.Whatisthenameofthetypeoffadingwhichisduetoshadowing?D4A)MultipathB)AtmosphericfadingC)RayleighfadingD)Log-normalfadingE)Pathloss15.AcellhasthreeTRUswithanSDCCH/8configuration.Whatisthemaximumnumberoftelephonecallsitcansupportsimultaneouslywithahalf-ratevocoder?BA)22B)44C)8D)3E)4616.Whichtypeofinterferenceisproducedbyothertransmittersonthesamefrequency?BA)DoubleinterferenceB)Co-channelinterferenceC)AdjacentchannelinterferenceD)ReflectedinterferenceE)Timinginterference17.Whichlogicalchannelmustbedimensionedforeachcellwhenconsideringthecallset-upfrequency?CA)SACCHB)FCCHC)SDCCHD)SCHE)BCCH18.Whichunitisusedformeasuringtraffic?AA)ErlangB)Bit/second5C)HertzD)Subscribers/kHzE)Subscribers/minute19.Whatisthedifferencebetween1milliwattand1watt?BA)TheycannotbecomparedB)30dBC)ThereisnodifferenceE)10dBmW20.Whichofthefollowingproblemsexistsindigitalradiosystems,butnotinanalogradiosystems?EA)RayleighfadingB)AtmosphericattenuationC)CongestionD)Log-normalfadingE)Intersymbolinterference21.Whatcellpropertyislimitedbytimingadvance?CA)NumberofsimultaneouscallsB)FrequencyofcallsetupsC)RadiusD)AntennalengthE)Color22.Whichchannelisusedtosendthemobile'smeasurementreport?DA)SDCCH(StandaloneDedicatedControlCHannel)B)FACCH(FastAssociatedControlCHannel)C)MRCH(MeasurementReportCHannel)D)SACCH(SlowAssociatedControlCHannel)E)TCH(TrafficCHannel)623.WhatdoesGoS(GradeofService)mean?DA)NumberofavailablesubscriberservicesB)Percentageofsuccessfulcallset-upsC)ChannelutilizationD)Percentageofunsuccessfulcallset-upsduetocongestionE)Percentageofdroppedcalls24.Aparticularcellisexpectedtosupport6Erlangsoftrafficat1%GradeofService.Howmanytrafficchannelsarerequired?BA)6B)13C)3D)15E)2225.Whatissystembalance?EA)EachcellcanhandlethesameamountofsubscribersB)ThenetworkisdimensionedforallmobileclassesC)AllcellsareofthesamesizeD)AllBTSsusethesameoutputpowerE)Uplinkanddownlinkcoverageisthesame26.Whichoftheseassumptionsisnecessarytouseinsystembalance?BA)ThesensitivityisthesamefortheMSandtheBTS.B)ThepathlossisthesamefortheMSandtheBTS.C)ThefeederlossisthesamefortheMSandtheBTS.D)TheantennagainisthesamefortheMSandtheBTS.E)ThecombinerlossisthesamefortheMSandtheBTS.27.Whichoftheseisnotapredictionmodelforradiocoverage?D7A)Algorithm9999B)Cost-231C)Okumura-HataD)BenihanaE)Walfish-Ikegami28.Whichcellpatternisrecommendedtousewhenusingfrequencyhopping?BA)4/12B)3/9C)7/21D)7/7E)Noneofthese29.Reusingfrequenciesinacellularpattern(comparedto“onebigcell”)DA)Increaseschannelutilization,cost,andinterference.B)Increasescapacityandcost,butdecreasesinterference.C)Increasescapacity,butdecreasescostandinterference.D)Increasescapacity,cost,andinterference.E)Increaseschannelutilizationandcost,butdecreasesinterference.30.Asubscribermakesatwo-minutecallandafour-minutecallduringthebusyhour.Howmuchtrafficdoeshegener