2023年全國(guó)碩士研究生考試考研英語一試題真題(含答案詳解+作文范文)_第1頁
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1、Y1406681中山大學(xué)碩士學(xué)位論文VOIP在NGN核心網(wǎng)中的應(yīng)用TheapplicationsofVOIPtechnologyinthecorenetworkofNGN學(xué)位申請(qǐng)人:葉茵導(dǎo)師姓名及職稱:梁凡副教授專業(yè)名稱:電子與通信工程研究方向:移動(dòng)軟交換答辯委員會(huì)主席:委員:籃叁盤2008年lO月Title:TheapplicationofVOIPtechnologyinthecorenetworkofNGNMajor:Electro

2、nicandCommunicationEngineeringName:YinYeSuperVisor:ProfessorLiangFanNextGenerationNetwork(NGN)isbasedontheconceptthatonenetworktransportsallinformationandservicesthroughencapsulatingtheseintopackets,NGNiscapableofprovidi

3、ngvoice,data,andallsortsofmediasuchasvideo,Therefore,theNGNarecalledasMulti—ServicesIntegratedNetworkNGNhasrealizedtheseparationsbetweenserviceandthecontrol,theseparationbetweencontrolandthebearer,theseparationbetweenbea

4、rerandaccessFurthermore,NGNformsfullyopeninghierarchicalarchitectureSoftswitchprovidescallcontrolandaccesscontrolofrealtimeserviceItisthecoreofNGN’Scallandcontr01alsoissignificanttobeutilizedSoftswitchoccupyakeypointinbo

5、thCoretechnologyofNGNthatcontainstwoaspects,theoneiSbearnetwork,andtheotheroneiSservicenetworkFurthermore,oneofthemostimportantdevicesinNGNissoftswitchwhencomestovoiceapplicationsSoftswitchbasedVOIPwillbeNGN’Smainsevicei

6、nfutureVOIP(VoiceOverInternetProtoc01)isapacketizedanddigitalizedtechniquethatbasedonIPtechnology,itsbasicideaareillustratedasfollow:Itcompresscodingspeechwithspeechcompressionalgorithm,thenpacketthesedatawithprotocolssu

7、chasIP,furthermore,transmitthesethroughIPnetworktothereceiver:eventually,VOIPdecodesthesespeechdata,recoverytheseintooriginalspeechsignal。IPtelecommunicationsystemstransferanaloguesignalintraditionaltelecommunicationnetw

8、orkintoIPpacketswhicharecapableofbeingusedininternetMeanwhile,IPtelecommunicationsystemsalsotransferthereceivedIPpacketsintospeechasanaloguesignalFirstly,thisthesisintroducescriticaltechnologyandNetworkingstructureofVOIP

9、briefly,discusseditsdevelopmentanditsapplicationsoncontemporarynetworkAfterthat,thethesiSmainlyfocusedonGMCC’SVOIPexperimentalproject’Sreformationprocessanditseffecttest,besides,thethesisalsoundergosometheoreticalanalysi

10、s,whichcanbedividedintothesepart:Reformhardwareandsoftwareofsoftswitchequipments’loadbearingfunctions:startIPbeartrafficfunction:Evaluatetheeffectofreformationanditsriskassessmentwithinproject,aswel1asitsCountermeasuresK

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