Nws yog lub pob txha kis tau tus mob network ntawm cov tiam tom ntej.Yooj yim muab, nws yog wavelength-raws li kev thauj mus los txuas ntxiv tom ntej.
OTN yog ib qho kev thauj mus los raws li kev sib faib wavelength multiplexing thev naus laus zis uas teeb tsa lub network ntawm cov txheej txheem kho qhov muag, thiab yog cov pob txha thauj khoom ntawm cov tiam tom ntej. OTNyog ib tiam tshiab ntawm "digital transmission system" thiab "optical transmission system" tswj los ntawm ITU-T cov lus pom zoo xws li G.872, G.709, thiab G.798.Nws yuav daws tau qhov teeb meem ntawm tsis muaj wavelength / sub-wavelength cov kev pab cuam nyob rau hauv ib txwm WDM tes hauj lwm.Cov teeb meem xws li kev teem caij tsis zoo, tsis muaj peev xwm sib txuas lus tsis muaj zog, thiab muaj peev xwm tiv thaiv tsis muaj zog.OTN daws tau ntau yam teeb meem ntawm cov kab ke ib txwm siv los ntawm ntau cov txheej txheem.
OTN nthuav dav cov khoom siv hluav taws xob ib txwm muaj (kev xa xov digital) thiab kho qhov muag (analog kis tau tus mob), thiab yog tus qauv sib koom ua ke rau kev tswj hwm hluav taws xob thiab kho qhov muag.
Lub ntsiab khoom ntawm OTN kev ua haujlwmyog lub lag luam wavelength-theem, uas thawb lub network thauj mus rau theem ntawm qhov tseeb multi-wavelength optical network.Vim muaj kev sib xyaw ua ke ntawm qhov zoo ntawm qhov chaw kho qhov muag thiab cov khoom siv hluav taws xob ua haujlwm, OTN tuaj yeem muab lub peev xwm xa tawm loj, pob tshab kawg-rau-kawg wavelength / sub-wavelength kev sib txuas thiab cov cab kuj-chav kawm tiv thaiv, thiab yog cov cuab yeej zoo tshaj plaws rau kev xa cov broadband loj. - cov kev pabcuam particle.
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Qhov txiaj ntsig tseem ceeb ntawm OTN yog tias nws muaj qhov rov qab ua tau zoo, nws tuaj yeem tsim los ntawm SONET / SDH kev tswj hwm uas twb muaj lawm, nws tsis tsuas yog muab kev ua tiav ntawm cov txheej txheem kev sib txuas lus uas twb muaj lawm, tab sis kuj muab kev sib txuas ntawm qhov kawg thiab kev sib txuas rau WDM. , Nws muab cov specification ntawm optical txheej interconnection rau ROADM, thiab ntxiv cov sub-wavelength aggregation thiab tu lub peev xwm.Qhov kawg-rau-kawg txuas thiab kev sib txuas muaj peev xwm yog tsim los ntawm SDH, thiab cov qauv ntawm cov txheej txheem kho qhov muag tau muab.
Lub tswv yim OTN npog cov txheej txheem kho qhov muag thiab cov txheej txheem hluav taws xob, thiab nws cov thev naus laus zis tau txais txiaj ntsig zoo ntawm SDH thiab WDM.Cov yam ntxwv tseem ceeb yog raws li nram no:
1. Ntau tus neeg siv lub teeb liab encapsulation thiab pob tshab kis tau tus mob OTN thav duab qauv raws li ITU-TG.709 tuaj yeem pab txhawb kev kos duab thiab pob tshab ntawm ntau tus neeg siv cov teeb liab, xws li SDH, ATM, Ethernet, thiab lwm yam. Standard encapsulation thiab pob tshab kis tau tus mob. rau SDH thiab ATM, tab sis kev txhawb nqa rau Ethernet ntawm tus nqi sib txawv.ITU-TG.sup43 muab cov lus pom zoo ntxiv rau 10GE cov kev pabcuam kom ua tiav qib sib txawv ntawm pob tshab kis tau tus mob, thaum rau GE, 40GE, 100GE Ethernet, kev pabcuam ntiag tug network Fiber Channel (FC) thiab nkag mus rau kev pabcuam network Gigabit Passive Optical Network (GPON) ), thiab lwm yam ., tus qauv kev kos duab rau OTN ncej yog tam sim no nyob rau hauv kev sib tham.
2. Bandwidth multiplexing, crossover thiab configuration ntawm loj hais Cov hluav taws xob txheej bandwidth hais raws li OTN yog optical channel cov ntaub ntawv units (O-DUk, k=0,1,2,3), uas yog ODUO(GE,1000M/S) ODU1 (2.5Gb/s), ODU2 (10Gb/s) thiab ODU3 (40Gb/s), bandwidth granularity ntawm optical txheej yog wavelength, piv rau lub sij hawm granularity ntawm SDH VC-12/VC-4, OTN multiplexing, crossover thiab cov teeb pom kev zoo yog pom tseeb ntau dua, uas tuaj yeem txhim kho kev hloov pauv thiab kev sib kis tau zoo ntawm cov ntaub ntawv bandwidth siab rau cov neeg siv khoom.
3. Muaj peev xwm nyiaj siv ua haujlwm thiab kev saib xyuas kev tswj hwm OTN muab kev tswj hwm nyiaj siv ua haujlwm zoo ib yam li SDH, thiab OTN thav duab qauv ntawm OTN Optical Channel (OCh) txheej zoo heev txhim kho cov kev saib xyuas digital ntawm txheej txheej no.Tsis tas li ntawd, OTN tseem muab 6-txheej nested serial kev sib txuas saib xyuas (TCM) muaj nuj nqi, uas ua rau nws muaj peev xwm ua tau qhov kawg-rau-kawg thiab ntau ntu kev saib xyuas tib lub sijhawm thaum OTN networking.Muab cov kev tswj kom tsim nyog rau kev sib kis ntawm tus neeg teb xov tooj.
4. Txhim kho kev sib txuas lus thiab kev tiv thaiv kev muaj peev xwm Los ntawm kev qhia txog OTN thav duab qauv, ODUk crossover thiab multi-dimensional reconfigurable optical add-poob multiplexer (ROADM), lub peev xwm sib txuas ntawm optical thauj network tau zoo heev, thiab SDHVC-raws li 12 / VC-4 teem sijhawm bandwidth thiab cov xwm txheej quo ntawm WDM point-to-point muab qhov loj-muaj peev xwm kis tau tus mob bandwidth.Kev txais yuav ntawm kev kho qhov yuam kev rau pem hauv ntej (FEC) thev naus laus zis ua rau kom qhov kev ncua deb ntawm optical txheej kis tau tus mob.Tsis tas li ntawd, OTN yuav muab cov kev pabcuam hloov tau yooj yim dua kev tiv thaiv kev ua haujlwm raws li cov txheej txheem hluav taws xob thiab cov txheej txheem kho qhov muag, xws li ODUk txheej-raws li photonic network txuas tiv thaiv (SNCP) thiab sib koom lub nplhaib sib txuas tiv thaiv, kho qhov muag-raws li optical channel lossis multiplex seem tiv thaiv, thiab lwm yam. . Tab sis cov cuab yeej siv sib koom ua ke tseem tsis tau ua qauv.
Post lub sij hawm: Nov-01-2022