基于IEEE802.16协议的ADHOC网络MAC层QOS保障技术的研究与设计

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1、北京交通大学硕士学位论文基于IEEE802.16协议的AdHoc网络MAC层QoS保障技术的研究与设计姓名：崔蕾申请学位级别：硕士专业：通信与信息系统指导教师：李旭20080601j匕京銮适太堂亟±堂僮i金塞△旦墨!＆△￡!ABSTRACTABSTRACT：AdHoctechnologyhasbecomeahotspotincurrentwirelesscommunicationresearchfield．Withthecontinuousdevelopmentofresearch，AdHoctechnologyhasbeenallapp

2、licationsolutionofnextgenerationmobilecommunicationnetwork．TheapplicationenvironmentrequiresthatwirelessAdHocnetworksupportsQuality-of-Service(QoS)．MAClayerisinthebottomoftheAdHocnetworkprotocolstack，whichisthedirectcontrolIerofdataprocessingandmessagetransactiononthewire

3、lesschannel．Asaresult，whetherthelimitedwirelessresourcecanbeusedefficientlyinMACprotocolaffectstheQoSguaranteeintheAdHocNetworkdirectly．ThispaperfocusesonthekeytechniquesofMAClayerQoSguaranteemechanisminAdHocnetwork．SincetheMACprotocolofIEEE802．16Meshmodehasprovidedagoodf

4、rameworkforQoSguarantee，itcarlbeusedintheAdHocnetworkwhichneedsQoSguarantee．ButthereisnotadetailedstandardoftheresourceschedulingalgorithmfortheMACprotocolofIEEE802．16Meshmode，SOfurtherdevelopmentislefttodesigners．AccordingtothecharacteristicsofAdHocnetwork，thispaperprese

5、ntsaresourceschedulingalgorithm，inwhichthepriorityofreal．timetransmittingoperationisraised，SOthattheimpactofnetworkmulti-hopscallbelightened．Besides，variableRSVPstepisusedinsteadoffixedoneindynamicRSVPadjustmentalgorithm；asaresultresourceallocationcanbechangedfaster嬲opera

6、tionchanges．Also，withthehelpofnewcongestiondetectionmoduleofMAClayer,thecongestionhandlingcapacityofthenetworkisimprovedandQOSguaranteemechanismisenhancedfurther．Toevaluatetheperformanceofthealgorithm，asimulationplatformissetandimplementedonWindowoperationsystem．Thesimula

7、tionresultsshowthatthenewresourceschedulingalgorithmandcongestiondetectionalgorithmnotonlyensurestheservicepriorityofreal—timeoperationbutalsoimprovestheresourceutilizationandnetworkthroughput．Thispaperisorganizedasfollows：Firstly,thegeneration,developmentandcharacteristi

8、csofAdHoenetworkareintroduced，thekeytechniquesofQoSguaranteeinAdHoenetwork，includingthearchitect