简介：Asthesystemperformanceisobviouslyimprovedbyintroducingtheconceptofrelayintothetraditionalorthogonalfrequencydivisionmultipleaccess(OFDMA)systems,resourceschedulinginrelay-enhancedOFDMAsystemsisworthyofbeingstudiedcarefully.Tosolvetheoptimizationproblemofachievingthemaximumthroughputwhilesatisfyingthequalityofservice(QoS)andguaranteeingthefairnessofusers,anovelresourceschedulingschemewithQoSsupportforthedownlinkoftwo-hoprelay-enhancedOFDMAsystemsisproposed.Theproposedscheme,whichisconsideredbothinthefirsttimesub-slotbetweendirectlinkusersandrelaystations,andthesecondtimesub-slotamongrelaylinkusers,takesQoSsupportintoconsideration,aswellasthesystemthroughputandthefairnessforusers.Simulationresultsshowthattheproposedschemehasgoodperformanceinmaximizingsystemthroughputandguaranteeingtheperformanceintheservicedelayandthedatalossrate.