计算机专业毕业设计英文翻译网络方向Word文档下载推荐.docx
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计算机专业毕业设计英文翻译网络方向Word文档下载推荐.docx
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计算机专业毕业设计英文翻译网络方向@#@Widebandopticalfiberaccessnetworktrendofdevelopment@#@Author:
@#@LiuJinhaiarticlesource:
@#@Computeruniversaltime:
@#@2005-3-8@#@文中字体改一致@#@Thisarticlefirstisbriefintroducedtheworldbroadbandaccessnetworkdevelopstheconditionandthemainapplication,nextnarratedthewidebandopticalfiberaccessnetworkmerit.Withemphasishasoncemoreanalyzedthewidebandpoint-to-pointactiveEthernetopticalfibersystemandthewidebandtothepassiveopticalfibersystemcharacteristicandtheapplication.Meetsdownproposedourcountryopticalfiberaccessnetworksendschem.possibletosurmountAPON,BPONandtheEPONstage,startsfromthewidebandpoint-to-pointEthernetopticalfibersystemandGEPON,finallyandeventransitstotheGPONstagepreliminaryidea.Finallyanalyzedtheopticalfibercommunicationstechnologytrendofdevelopmentfromeachangle.@#@Thebroadbandaccessnetworkdevelopsconditionandmainapplication@#@Infact,lookingfromthetelecommunicationdevelopmenthistory,whenthenetworknumberofusersachievescertainscale.Eachkindofapplicationmeetsthenatureproduction;@#@thisalsoisso-calledstepstheCufflawmighttobeatespecially.Inthehistoryonekindoftechnologysincebirthhasnotbeenhavingabigpileofapplication,regardlessofisthemobilecommunicationortheInternet,onitsshortnote,thebrowsing,thenetchatsandsoonthekeyapplicationsallisdevelopscertaindegreeaftertheuserscaletoproducenaturally,butisnotsedulouslydesignsbeforehandplans.@#@Sincehasenteredforthe21stcentury,thewholeworldbroadbandaccessnetworkenteredthebigdevelopmentphase.To2004year'@#@send,thetotalnumberofusersalreadyachieved150,000,000,becameintheelectricityreliablehistoricalaccounttodeveloponeofquickesttelecommunicationservices,andevenwasalsoquickerthanthemobileservice.Forexamplethewholeworldmobileservicefrom10,000,000developedto100,000,000hasspentfor5.5years,butthebroadbandaccessservicehasonlyusedfor3.5years.AccordingtotheIDCforecast,in2007theglobalwidebandtotalusermayachieve209,000,000,inwhich9.9,namelyabout20,000,000usersforopticalfiberaccessnetwork.@#@TheAsianandPacificarea,speciallySouthKorea'@#@sandJapanwerethebroadbandaccessdeveloptheswiftestmostandviolentcountry,theSouthKoreanwidebandusertotalalreadybreakthrough10,000,000,thewidebandpopularrateoccupiedtheworldfirst,holdfamily7Internet90%.JapaneseGovernmentalsovigorouslyadvancesthewidebanddevelopmentthrougheachmeasure,plansin2005toenhancethewidebandusertotalto30,000,000,inwhichFTTHachieves110,000.USstillistheworldbiggestbroadbandaccessmarket,thetotalnumberofuserssurpasses30,000,000.AmericanFOCthewidebandservicelocalizationisoneof2003-2008yearsixbiggoals,infactthebroadbandaccessisbecomingtheAmericanuniversalservicethenextgoal.TheUSbroadbandaccessisprimarilydevelopsbythecabletelevisionandADSL,becausethetelecommunicationcontrolpolicyencouragementusesthenewtechnicalconstructionnetwork(e.g.FCCstipulationoperationbusinessconstructionopticalfiberaccessnetworktobepossiblenotlimitedthepressurewhichinlocalringcircuitnon-colligationpolicy)aswellasthecompetitionandtheservicegrows,recentlyleadstheoperationbusinesstobeextremelypositivetotheopticalfibertothestation(FTTP)development.@#@Speakingoftheopticalfiberaccessnetwork,speciallytheopticalfibertostation(FTTP)oropticalfiberproficient(FTTH),thewholeworldalreadystartedtoentertheunloadingphase,onlyUShad270FTTPprojects,wasmostlythelocalauthority,thepubliccompany,thepropertydeveloperandthenon-leadingtelecommunicationoperationbusinessproject.Leadingoperationbusinessalsostartstoenterthisdomain,inwhichVersionplansin2005tocomplete3,000,000FTTP;@#@SBCintheplanplansin2007initshuge“speedoflight”toreach18,000,000FTTN,eachhouseholdhasspeed20-39Mb/s,providestheend-to-endtertiaryservicecolligation(triteplay)theservice.JapanisintheworldadvancestheFTTHmostradicalcountry,2.004yearsitsopticalfiberonalreadyunderstoodmorethan18,000,000householdsfamilies,buttheuserdevelopmentlag,probablywas2,000,000,in2005plansdevelops10,000,000.Europequiteissteadyconservatively,FTTHaltogetherhaslaidto2004500,000,some167smallprojectsortheexperimentalprojectarecarryingon.@#@Ourcountrybroadbandaccessnetworkextremelyisalsorapidintheneartwoyeardevelopment,accordingtothepreliminarystatistics,to2004year'@#@sendourcountrywidebanduseris25,000,000,becomesisinferiortoUS'@#@ssecondbigbroadbandaccessmarket,inwhichleadershiptechnologyisonlyADSL,probablyaccountsforabout70%,nextistheEthernet
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