Graph theory based physical cell identity self-configuration for LTE-A network-中国期刊网

摘要 Self-configurationofphysicalcellidentity(PCI)isakeyfeatureforthelongtermevolutionadvanced(LTE-A)network.ThePCIisusedtoidentifythedifferentcellsinthesystem,becominganessentialcellconfigurationparameter.ConsideringtheuncoordinateddeploymentsoftheevolvedNodeB(eNodeB)andthelimitednumberofPCI,thePCIassignmentforcellswouldbequitecomplex.ThispaperpresentsandputsforwardagraphtheorybasedcentralizedPCIself-configurationscheme(GT-PCIS).ThePCIself-configurationproblemismappedtothewell-knownminimumspanningtree(MST)probleminordertooptimizethePCIreusedistanceanddecreasethemultiplexinginterferencethroughouttheentirenetwork.TheproposalprovidesagreedysearchtomakethelocallyoptimalselectionofPCIateachstage,andtoachieveaglobaloptimum.Todemonstratethealgorithmvalidity,performancesofGT-PCISandmanualconfigurationareevaluated.SimulationresultsshowthattheproposedGT-PCISoutperformsotherconfigurationalgorithmsevenundertheconditionofseverePCIdeficiency.

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Graph theory based physical cell identity self-configuration for LTE-A network

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Graph theory based physical cell identity self-configuration for LTE-A network

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