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1、.word格式,IndoordistributionsystemfaultproblemsandtreatmentmethodsXuanLIChinaMobileCommunicationsGroupBeijingCo.,Ltd,Beijing,ChinaAbstract:Withtherapiddevelopmentofmobilecommunication,themobilephonehasgraduallybecomethePeople'sDailylifeiswidelyusedinamoderncommunicationtools,atthesametime
2、,themobileusertothemobilecommunicationservicequalityrequirementsofthemoreandmoreisalsohigh,theyhaveonlynolongersatisfiedwithgoodoutdoormobilecommunicationservices,butalsotherequirementsintheinterior(especiallystarhotel,largestores,officebuildingsandothersenior)canenjoyhigh-qualitymobile
3、communicationservices.Andbecausemodernarchitecturewithreinforcedconcreteskeletons,plusthefullyclosedoutsideofdecorate,radiosignalattenuationoftheshieldspecialgood,thatcallqualityseriousdecline.Specificinfluenceasfollows,inthelargebuildinglowerundergroundmall,undergroundparkinglot,suchas
4、environment,basestationreceivedsignalisveryweak,itwillcausethemobilecan'tbeusednormally,formedthesignalcoverageoftheblindarea;Inthelargebuildinginthemiddleofthefloor,becausethemobilephonecanreceivedifferentbasestationsaroundthesignal,sothatthebasestationsignalproducejackknife,producetab
5、letenniseffect,whichseriouslyaffectedthenormaluseofthecellphone;Inthetoppartoflargebuildings,enterindoorwirelesssignalissocluttered,bothofthebaseseveralnearbysignal,alsohavenotfarfromthebasestation,refractedthroughdirectsignal,reflection,diffractionmeanssuchasenterindoor,causeindoorrece
6、ivedsignalandstrongandweakextremelyunstable,withfrequency,adjacentfrequencyinterferenceisveryserious.Mobilephoneuseinthisenvironment,whentheidlestatevillagere-electionfrequent,whileincommunicationfrequentswitch,voicequalityaffectedconsiderably,easytoproducethephenomenontodropwords.Inadd
7、ition,insomebuildings,althoughcellphonescannormalconversation,buttheuserdensityistoobig,channelisverycrowded,mobilephoneonlinedifficult.Therefore,howtosolvetheproblemofindoorsignalcoverage,andmeettheneedsofusers,andimprovethequalityofnetwork,hasbecomemoreandmoreimportant,alsobe
