Mode Selection, Resource Allocation, and Power Control for D2D-Enabled Two-Tier Cellular Network

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1、3534IEEETRANSACTIONSONCOMMUNICATIONS,VOL.64,NO.8,AUGUST2016ModeSelection,ResourceAllocation,andPowerControlforD2D-EnabledTwo-TierCellularNetworkYifeiHuang,StudentMember,IEEE,AliA.Nasir,Member,IEEE,SalmanDurrani,SeniorMember,IEEE,andXiangyunZhou,Member,I

2、EEEAbstractThispaperproposesacentralizeddecisionmakingfemtocellaccesspoints(FAPs),significantlyimprovestheframeworkatthemacrobasestation(MBS)fordevice-to-throughputforinindoorenvironmentsaswellastheoveralldevice(D2D)communicationunderlayingatwo-tiercellu

3、larnetworkspectrumandenergyefficiencies[5],[6].However,network.WeconsideraD2DpairinthepresenceofanMBSandcross-tierinterferenceneedstobeproperlymanagedinsuchafemtoaccesspoint,eachservingauser,withqualityofserviceconstraintsforallusers.Ourproposedsolutione

4、ncompassesnetworks[4].modeselection(choosingbetweencellularorreuseordedicatedRecently,D2Dcommunicationsallowingdirectcommuni-mode),resourceallocation(incellularanddedicatedmode),andcationbetweennearbyusershasbeenenvisagedin3GPPpowercontrol(inreusemode)w

5、ithinasingleframework.Thestandards[7].TheD2DuserscanutilizeunlicensedspectrumframeworkprioritizesD2DdedicatedmodeiftheD2Dpair(out-of-band)orlicensedspectrum(in-band).Comparedtoisclosetoeachotherandorthogonalresourcesareavailable.Otherwise,itallowsD2Dreu

6、semodeiftheD2Dsatisfiesbothout-of-band,in-bandD2Dcanprovidemorequalityofservicethemaximumdistanceandanadditionalinterferencecriteria.guarantees[2]andisconsideredinthispaper.Inin-bandForreusemode,wepresentageometricvertexsearchapproachD2D,therearethreemod

7、esofoperationfortheD2Dusers:tosolvethepowerallocationproblem.Weanalyticallyprovethe(i)dedicated(oroverlay)modewhereD2Dusersareallocatedvalidityofthisapproachandshowthatitachievesnearoptimaldedicatedspectrum,(ii)reuse(orunderlay)modewhereD2Dperformance.F

8、orcellularanddedicatedmodes,weshowthatfrequencysharingmaximizessumrateandsolvetheresourceusersreuseexistingspectrumresourcesand(iii)cellularmodeallocationprobleminaclosedform.OursimulationsdemonstratewheretheD2Dusersaretreatedasn