WCDMA Iub接口QoS保證與研究.pdf

1、南京郵電大學碩士學位論文WCDMAIub接口QoS保證與研究姓名：蔡輝強申請學位級別：碩士專業(yè)：計算機軟件與理論指導教師：孫知信20090301ABSTRACTWCDMAisthemostwidelyusedthirdgenerationmobilecommunicationsystem，andDrovidesuserswithavarietyofdifferentservicesAsdataservicessuchasmultimed

2、iaandDacketexceedinglydemandonnetwork，whiletheIubinterfaceisthebottlenecktoachieveQoS舒JaraIlteemechanism，itisveryimportantforWCDMAtoprovidecomprehensiveQoS田盼ranteemechanismReasonableandefficientQoSguaranteemechanismofIub

3、interfacecarlhi烈Yimproveresourceutilizationandsystemthroughputandserviceperformance，whichseⅣeusersbetterSoitbecomesahotfocustoeverymajortelecomoperatorsandequipmentmanufacturersThisarticlestudyonIubinterfaceQoSguaranteem

4、echanisminWCDMAFirstlystudyoncommunicationprotocolstandardsandQoSmechanism，thengroundonmanyresearchandanalysisaboutQoSstrategiesandalgorithms，thispaperpresentsasuitabledesignandsetsupamodelofIubQoSThismodeisdividedintoth

5、reeparts：Iubadmittancecontrol，congestiondetcctionandflowcontr01Forthefirstpartweuseoverbookingresourceallocationalgorithm，thatisallocatingtransportresourcetoservicereasonablyandefficientlywhenadmittingmoreusers：Astothese

6、condpart，weadoptgradedcongestiondetectionalgorithmcombinedwithadjacentpointandresourcegroup，thatisdetectingandreportingitscongestionstatusundereveryresourcechange；Forthelastpart，overbookingflowcontrolandanti。pressurealgo

7、rithm1sadoptedbasedonportdetectingservicequeue，thatistospeeduporslowdownservicequeue。svelocitywhencongestionoccurredorrecovered，whichcallavoidpacketlossandcongestioninordertoguaranteebandwidthutilizationandtransporteffic

8、iencyComparedwithexistedQoSresearches，thisdesignismorecomprehensiveandreasonableAtlast，thesimulationsandexperimentsshowthatthemodelCanimprovemobileservices’performanceinWCDMAlubinterfacetransmission，differentservicesaree