Cross-Layer Adaptive Resource Management for Wireless Packet Networks with.pdf

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1、InReviewintheIEEETransactionsinWirelessCommunications(PaperTW05-002R1)Cross-LayerAdaptiveResourceManagementforWirelessPacketNetworkswithOFDMsignalingYingJunZhangandKhaledBenLetaief,Fellow,IEEECenterforWirelessInformationTechnologyTheDepartmentofElectricalan

2、dElectronicEngineeringTheHongKongUniversityofScienceandTechnologyClearWaterBay,Kowloon,HongKongEmail:yjzhang@ust.hk,eekhaled@ee.ust.hkAbstract–Adaptiveresourcemanagementhasbecomeakeytechniqueforthenext-generationwirelesssystemstoprovidedesiredservicesatappr

3、opriateQoS.Mostofthecurrentresourcemanagementalgorithmsareconfinedtoasinglelayerofthenetworkprotocolstack,whichleadstoaninferiorperformance.Inthispaper,weproposeajointMAC-PHYlayerresourcemanagementalgorithmforwirelessOFDMnetworks.Thealgorithmaimstomaximizet

4、hesystempowerefficiencygiventhatthefulfillmentoftheQoSaswellasthefairnessisguaranteed.Weformulatetheintegrateddesignofpacketscheduling,subcarrierallocation,andpowercontrolintoaconstrainedoptimizationproblem.Theformulationdefinestheinteractionandcooperationb

5、etweendifferentcomponentsofthealgorithmaswellastheinformationexchangebetweenthePHYandMAClayers.Areduced-complexityschemethatsolvestheoptimizationprobleminpolynomialtimeisthendevelopedbasedonthespecialstructureoftheproblem.Analyticalandnumericalresultswillsh

6、owthattheproposedalgorithmisabletoguaranteethesamedegreeofQoSandfairnessasthefairqueueingsystemsdoinwiredchannels.Meanwhile,thepowerefficiencyandsystemperformancearesignificantlyimprovedcomparedtotraditionalsystemswhereresourcesareallocatedbasedonastrictlay

7、eringarchitecture.KeyWords:Crosslayerdesign,OFDM,Adaptiveresourceallocation,Packetscheduling.CorrespondingAuthor:KhaledBenLetaiefEmail:eekhaled@ee.ust.hkTel:/Fax:(852)23587064/1485Internet:http://www.ee.ust.hk/~eekhaled______________________________________

8、__ThisworkissupportedinpartbytheHongKongResearchGrantCouncilundergrant#HKUST6250/04E.Cross-LayerAdaptiveResourceManagement…ZhangandBenLetaiefI.INTRODUCTIONThenext-generationwirelesssystemsareexpectedto