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ID:28324967
大小:7.83 MB
页数:65页
时间:2018-12-09
《ieee 802.16网络qos跨层机制的分析与优化》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、ASTUDYAND0PTIMIZp灯10N0FCROSS—LAYERFRAMEWORKFORQOSINI琶EE802.16NErWORKSABSTRACTWirelessMetropolitanAreaNetwork(WMAN)becomestobeanimportantpartofglobaltelecommunications。Asiswellknown,Wi撇basedonIEEE802.16,asanavailableaccessmethodforⅥ强压AN,hasdrawnagreatdealofattention
2、foritsbetterperformanceandbrilliantfutureinabroadofareas.Anewcross。layerframeworkforQoSin802.16d/enetworks,whichcouldsuccessfullyachieveQoSguaranteesandimprovetheperformancesofdifferenttypesofservicesinsingleBSPMPapplication,isproposedinthisthesis。Atfirst,wegeneral
3、izetheapplicationbackgroundandcurrentdevelopmentofWiMAXsystemsandIE董泡802.16.Then,technologyofQoSisanalyzedspeciallytoIEEE802.16d/e,includingitsbasicimplementation,technicalhighlightoftheframeworkandpacketschedulingtheoryAfterthat,。wedealwithtechnologyofcross—layer;
4、andalsogenerateanewkindofCROSS.1ayerframeworkforQoSin802.16networks,whereallfunctionmodulesareconsideredaccordingtouplinkanddownlink。Finally,thefourmainfunctionmodulesoftheproposedframeworkarediscussedindetailshere,includinganewmappingrulebetweenIPandMACservicesasa
5、nassistantbuffermanagementforbettersystemperformanceunderlowcomplexity,IPfragmentscontrolforMACframeprocessingwithlesswastage,calladmissioncontrolbasedonthresholdandSINRtoachievehighsystemvalidityandstability,andalsoahierarachicalpacketschedulingalgorithmforbothenh
6、ancedQoSguaranteesandfairness。Atthesametime,werealizethesimulationinstanceswithNStodisplaytheadvantagesoftheproposedscheme。IlKEYWORDS:802.16,WiMAX,QoS,CROSS—layer,mapping,scheduling掇北京邮电大学硕上学位论文IEEE802.16网络QoS跨层机制的分析与优化缩略语皤AssuredForwarding确保转发AMCAdaptiveModulation
7、andCoding自适应调制编码ARQAutomaticRepeatrequest自动重发请求A:rMAsynchronousTransferMode异步传输模式BEBestEffort尽力而为服务BSBaseStation基站BWABroadbandWirelessAccess宽带无限接入BW.REQBandwidthRequest带宽请求BW.RSPBandwidthResponse带宽请求应答CEDFCompensationEarliestDeadlineFirst补偿最早截止时间优先CIDConnectionID连接
8、标识CLControlledLoad可控负载CSIChannelStateInformation信道状态信息DAMADemandAssignedMultipleAccess按需分配多址访问Dif珞ervDifferentiatedService区分服务DRRDeftcitRoundRobi
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