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1、西南交通大學(xué)碩士學(xué)位論文全IP無線接入網(wǎng)QoS保證機制研究姓名:何曉文申請學(xué)位級別:碩士專業(yè):通信與信息系統(tǒng)指導(dǎo)教師:范平志20060301西南交通大學(xué)碩士研究生學(xué)位論文第lI頁Abstractnisclearthatttlenewgenera五onofwirelessnetwofkarchitectIlreisⅡ’basedpack。tnetwork,wheremelligh目ade11igllQosse“ices(such船t11erealtimevedioservice)arenomally唧ectcd.Bec孤seofmemobilitynah工reoftl
2、lemobileequipment,mepa也ofservicedatas打咖isch撇ged丘equently111erefore,itma】(esagreatchallengetosupportahi曲QoSseⅣiceformobileusers.whjchisthemainrese盯chareaoftllistllesis.Nowm舡lyQoSgIlar趾teemechanismshaveusedt11estrategyofadVanceresourcercservation.B勰ically,Thesemecllallismscan舒la糟眥eetheQo
3、Soft11emobileequipmentinwirelessaccessnetwork,butatⅡleexpeIlSeoftoomuc血baIld岍dthforreservingrcsources,ThistllesisaimsatfindingamoreemcientQoSguaranteemechanism.hltllismesis,firstlymeteclllliquesrelatedtoQoSareanalyzed.TwoⅢQoSmOdelsgBnera王王yadoptedbywirelessaccessnetworkarehltseⅣModelaⅡ
4、dDi髓eⅣModel,wllicharediscllS∞dind捌ls.TherIlhethesisdiscusse8也eexis婦gproblems鋤dtllepossiblere硒onsofmetwomodelsfor耐relessnet、陽rkapplicaIions.B髂edonmeanalysisandconlp碰sonofsomeexistingschemes,anewiInprovedsch哪eofhltservModelisproposed,Thenewschemeusesthe11icrarchicalmobilitym孤al;鋤e芏ltmech
5、aJlism,i.e.FCARmechanism,torealizernobilifymana量卿mentirlwirelessaccessn帆ork.B舔edonmeRsVPprotocolsi驢aling,newsignadingis岫DduccdtoreseⅣethcp勰siveresourceontllepathbe“,eenⅡ1eSA孤dtllenei星r且borceU’sstationofmobileequipmem,in0rdertogIlarameematamobileequipmentcallgctmene時orkresource蠲soon勰the
6、hando行is丘nished.Finally’memodelinga重1dsirnlllationofmeI地wsch鋤earecarriedom.ThesiImllationresuhs虹lowtllattllenewschemecanensllrethedatastreamsofwi咒lessaccessnetworktodbtainhi吐QoSFadew油lessreseⅣedb鼬dwidmalld1esssi印aliIlgo、劬eads.Ke”∞r(nóng)d:W訛kssAccessN曲^,ork;QoS:RSVP;MobileP;R腳ourceReservatio
7、n西南交通大學(xué)碩士研究生學(xué)位論文第1頁1.1IPQoS技術(shù)與模型第一章緒論OoS(qualityofsefvice),即服務(wù)質(zhì)量。它的提出始于A1阻訌交換機。今天,學(xué)術(shù)界普遍認(rèn)為QoS有廣義和狹義之分:狹義QoS指技術(shù)指標(biāo)(傳輸時延、抖動、丟失率、吞吐量);廣義QoS指資源調(diào)配與利用、層與層之間的協(xié)商,從而涉及不同層次的QoS。本文主要研究狹義QoS。RFC2386?對QoS的描述為:QoS是網(wǎng)絡(luò)在傳輸數(shù)據(jù)流時要求滿足的一系列服務(wù)請求,具體可以量化為帶寬、延遲、延遲抖動、丟失率、吞吐量等性能指標(biāo)。它反映了網(wǎng)絡(luò)元素(例如,應(yīng)用程序,主機或路由器)在保證信息傳輸和滿