lte-a异构网中无线资源管理关键技术的-研究

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1、万方数据△旦SⅨ￡I一一ABSTRACTInordertOmeettherequirementsofhigherdatarateandlowerdelayinthenextgenerationwirelesscommunicationsystem，3GPPproposedLTEandLTE—A．AsthesmoothevolutionofLTE，LTE．Aintroducedsomekeytechnologiessuchascarrieraggregation，CoMPandheterogeneousnetwork，whichfurtherimprovethesyst

2、emcapacityandexpandthenetworkcoverageaswell．Bydeployinglow。powernodessuchashomeeNB，picoeNB，relaysinthecoverageofmacrocell，heterogeneousnetworkCaneffectivelyimprovethespectrumefficiency,reducetheloadofMeNBandeliminatethecoveragehole．Heterogeneousnetworkbringsaverygoodgainforthesystem．How

3、ever,italsobringssomedrawbacks，suchasthecomplexityofthenetworkarchitecturemakestheinter．eellinterferencemorecomplicated．SotheradioresourcemanagementinLTE-Abecomesanewresearchtopic．Tosolvethecross．tierinterfe；rencebetweenMeNBand10Wpowernodes，TimedomaionelCICandfrequecydomainelCICwereprop

4、osedin3GPPR10，whileFelCICWasproposedinRl1．ThispapermainlystudiesfrequencydomaineICICandFelCICwhichisbasedonLP．ABSinMacro．Picoscenario．Firstly,apowercontrolschemewhichisbasedonthemodifiedfrequency-domainelCICisproposedtoimprovetheutilizationratioofresources．Byadjustingthepriceandpowerofe

5、achsub．channelonthelowpowerband，MacrocellandpicocellCanreachStackelbergequilibriumandfinallyrealizethemaximizationofsystemefficiency．SimulationresultsshowthattheproposedschemeCallimproveUEaveragedatarateeffectivelycomparedwithfixedpowerallocationscheme．Secondly,toguaranteeMUE’Sminimumda

6、tarateandprotectERPUEsfromexcessivecross．tierinterference，weproposeanovelsubchannelandpowerallocationschemeaimingatmaximizingthethroughputofMUEsonLPB．Itismodeledasanon．convexoptimizationproblemthentransformedintoaconvexproblemandsolvedbydualdecompositionmethod．Itisshownthattheproposedal

7、gorithmCanconvergetotheoptimalvaluewithasmallnumberofiterationsandachievesubstantialtransmissionrategainsovertheexistingsuboptimalEPA-SSAalgorithm．Finaly,thestrategyofLP-ABSpowerarrangementandresourceallocationinFeICICWasresearched．AssumingthatLP—ABSpowerhaspositivecorrelationw