Txoj kev siv lub teeb xa cov ntaub ntawv tuaj yeem hais tias muaj keeb kwm ntev.
Niaj hnub no "Beacon Tower" tau tso cai rau tib neeg kom paub txog qhov yooj yim ntawm kev xa cov ntaub ntawv los ntawm lub teeb.Txawm li cas los xij, txoj kev sib txuas lus kho qhov muag tseem ceeb no yog qhov rov qab, txwv los ntawm kev sib kis deb pom ntawm qhov muag liab qab, thiab kev ntseeg siab tsis siab.Nrog rau kev txhim kho kev xav tau ntawm kev sib raug zoo xov xwm, kev yug me nyuam ntawm kev sib txuas lus kho qhov muag niaj hnub tau raug txhawb ntxiv.
Pib niaj hnub optical kev sib txuas lus technology
Xyoo 1800, Alexander Graham Bell tau tsim lub "kho qhov muag xov tooj."
Xyoo 1966, British-Suav Gao Kun tau npaj txoj kev xav ntawm optical fiber ntau kis tau tus mob, tab sis lub sij hawm ntawd cov fiber ntau optical poob siab li 1000dB/km.
Xyoo 1970, kev tshawb fawb thiab kev loj hlob ntawm quartz fiber ntau thiab semiconductor laser tshuab txo cov fiber ntau poob mus rau 20dB / km, thiab laser siv zog yog siab, kev ntseeg tau muaj zog.
Xyoo 1976, kev txhim kho txuas ntxiv ntawm cov tshuab kho qhov muag fiber ntau txo qhov poob los ntawm 0.47dB / km, uas txhais tau hais tias qhov kev poob ntawm qhov nruab nrab kis tau raug daws, uas txhawb nqa kev loj hlob ntawm kev siv tshuab optical transmissions.
Tshawb xyuas keeb kwm kev loj hlob ntawm kev sib kis network
Kev sib txuas lus tau dhau los ntawm ntau tshaj plaub caug xyoo.Hauv cov ntsiab lus, nws tau ntsib PDH, SDH / MSTP,
Kev tsim kho thev naus laus zis thiab kev tsim kho tshiab ntawm WDM / OTN thiab PeOTN.
Thawj tiam ntawm cov xov tooj sib txuas los muab cov kev pabcuam suab tau txais PDH (Plesiochronous Digital Hierarchy) thev naus laus zis.
Lub tiam thib ob muab kev pabcuam nkag mus rau hauv Web thiab TDM cov kab tshwj xeeb, siv SD (Synchronous Digital Hierarchy) / MSTP (Multi-Service Transport Platform) thev naus laus zis.
Cov tiam thib peb tau pib txhawb kev sib txuas ntawm cov kev pabcuam video thiab cov chaw pabcuam, siv WDM (Wavelength Division Multiplexing, Wavelength Division Multiplexing) / OTN (Optical Transmission Network, Optical Transmission Network) technology.
Lub cim thib plaub tau lees paub 4K siab-txhais yees duab thiab kev paub txog tus kheej zoo, siv PeOTN (Packet enhancedOTN, pob ntawv txhim kho OTN) thev naus laus zis.
Nyob rau theem pib ntawm thawj ob tiam neeg, rau cov kev pabcuam suab, Web Internet thiab TDM cov kev pabcuam ntiag tug, sawv cev los ntawm SDH / MSTP synchronous digital system technology, nws txhawb ntau qhov sib cuam tshuam xws li Ethernet, ATM / IMA, thiab lwm yam. tuaj yeem txuas sib txawv CBR / VBR.Encapsulate cov kev pabcuam rau hauv SDH thav duab, cais cov kav dej nyuaj, thiab tsom mus rau cov kev pabcuam qis-ceev thiab me me
Tom qab nkag mus rau theem thib peb txoj kev loj hlob, nrog kev loj hlob sai ntawm kev pabcuam kev sib txuas lus, tshwj xeeb tshaj yog cov kev pabcuam video thiab cov ntaub ntawv sib cuam tshuam, lub network bandwidth tau nrawm dua.Cov txheej txheem kho qhov muag uas sawv cev los ntawm WDM thev naus laus zis ua rau nws muaj peev xwm ua tau rau ib qho fiber ntau nqa cov kev pabcuam ntxiv.Tshwj xeeb, DWDM (Dense Wavelength Division Multiplexing) thev naus laus zis tau siv dav hauv kev lag luam loj hauv kev sib txuas lus, daws teeb meem ntawm kev sib kis.Qhov teeb meem ntawm kev ncua deb thiab bandwidth muaj peev xwm.Saib ntawm qhov ntsuas ntawm kev tsim kho network, 80x100G tau dhau los ua lub hauv paus ntawm cov kab hauv qhov ntev, thiab 80x200G hauv zos tes hauj lwm thiab cov cheeb tsam hauv nroog tau tsim kho sai.
Rau kev nqa cov kev pabcuam kev sib koom ua ke xws li video thiab cov kab mob siab rau, lub hauv paus kev thauj mus los yuav tsum tau ua kom yooj yim dua thiab kev txawj ntse.Yog li ntawd, OTN tshuab maj mam tshwm sim.OTN yog hom tshiab optical transmission technology system uas txhais los ntawm ITU-T G.872, G.798, G.709 thiab lwm yam kev cai.Nws suav nrog cov txheej txheem ua tiav ntawm cov txheej txheem kho qhov muag thiab cov txheej txheem hluav taws xob, thiab muaj cov sib txuas sib txuas rau txhua txheej.Kev tswj xyuas mechanism thiab network survivability mechanism.Kev txiav txim siab los ntawm cov qauv kev tsim kho hauv tsev tam sim no, OTN tau dhau los ua tus qauv rau kev sib txuas lus, tshwj xeeb tshaj yog nyob rau hauv kev tsim kho ntawm cov neeg ua haujlwm hauv zos network thiab cheeb tsam hauv nroog.OTN thev naus laus zis raws li hluav taws xob txheej crossover yog tsim los siv, thiab cov ceg kab sib cais yog siv., Txhawm rau ua tiav qhov kev sib txuas ntawm lub network sab thiab kab sab, zoo heev txhim kho qhov hloov pauv ntawm kev sib txuas lus thiab muaj peev xwm qhib thiab xa cov kev pabcuam sai sai.
Kev lag luam-oriented bearer network transformation
Kev nrawm ntxiv ntawm kev hloov pauv digital hauv txhua qhov chaw ntawm kev lag luam kev lag luam tau coj mus rau qhov sib npaug ntawm kev lag luam ICT thiab kev lag luam digital, thiab tau txhawb nqa thiab ua rau muaj kev hloov pauv loj hauv kev lag luam.Nrog rau kev nkag mus ntawm ntau lub lag luam tshiab hauv kev lag luam ntsug, cov kev lag luam ib txwm siv thiab cov qauv kev ua haujlwm thiab cov qauv kev lag luam tau raug tsim kho tas li, suav nrog: nyiaj txiag, tsoomfwv txoj haujlwm, kev kho mob, kev kawm, kev lag luam thiab lwm yam kev lag luam.Tau ntsib qhov kev xav tau ntau ntxiv rau kev sib txuas ua lag luam zoo thiab sib txawv, PeOTN thev naus laus zis tau maj mam pib siv dav.
· Cov txheej L0 thiab L1 muab cov kav dej "nyuaj" uas sawv cev los ntawm wavelength λ thiab sub-channel ODUk.Loj bandwidth thiab qeeb qeeb yog nws qhov zoo tshaj plaws.
· Cov txheej L2 tuaj yeem muab cov yeeb nkab "mos" hloov tau.Lub bandwidth ntawm cov yeeb nkab yog tag nrho nrog cov kev pabcuam thiab kev hloov pauv nrog kev hloov ntawm kev pabcuam tsheb.Flexibility thiab on-demand yog nws lub ntsiab zoo.
Kev sib koom ua ke ntawm qhov zoo ntawm SDH / MSTP / MPLS-TP rau kev nqa cov kev pabcuam me me, tsim L0 + L1 + L2 thauj network kev daws teeb meem, tsim kom muaj ntau qhov kev pabcuam thauj platform PeOTN, tsim kom muaj peev xwm nqa tau nrog ntau lub peev xwm hauv ib lub network.Xyoo 2009, ITU-T tau nthuav dav cov peev txheej sib kis ntawm OTN los txhawb cov kev pabcuam sib txawv thiab suav nrog PeOTN rau hauv tus qauv.
Nyob rau hauv xyoo tas los no, cov neeg ua haujlwm thoob ntiaj teb tau siv zog hauv tsoomfwv-kev lag luam ntiag tug kab lag luam.Peb tus tswv lag luam loj hauv tebchaws tau nquag tsim OTN tsoomfwv-kev lag luam ntiag tug network tsim.Cov tuam txhab lag luam hauv xeev kuj tau nqis peev ntau.Txog tam sim no, ntau tshaj 30 lub tuam txhab lag luam hauv xeev tau qhib OTN.Cov khoom lag luam ntiag tug zoo tshaj plaws, thiab tso tawm cov khoom lag luam muaj txiaj ntsig zoo raws li PeOTN, los txhawb kev thauj khoom siv kho qhov muag los ntawm "cov peev txheej hauv paus" mus rau "kev lag luam bearer network."
Post lub sij hawm: Nov-04-2021