Tam sim no, DWDM (Dense Wavelength Division Multiplexing) thiab OTN (Optical Transport Network) thev naus laus zis tau siv dav hauv kev sib txuas lus hauv kev sib txuas lus. DWDM thev naus laus zis zoo heev txhim kho cov peev xwm ntawm cov kho qhov muag fiber ntau, tab sis nws tsis txaus nyob rau hauv optical sau teeb liab ua thiab kev ua haujlwm pabcuam. , Tsis tuaj yeem ua tau raws li tus txheej txheem siab ntawm cov kev pabcuam dav dav. Raws li kev hloov kho cov khoom ntawm DWDM thev naus laus zis, OTN muaj ntau yam ntawm cov neeg siv cov cim teeb meem thiab cov kis tau pob tshab, loj-qhov loj bandwidth multiplexing, hloov khoom tawg yooj yim thiab kev teeb tsa lub sijhawm, muaj zog sab saum toj thiab saib xyuas kev tswj muaj peev xwm, thaum txhim kho sib txuas thiab tiv thaiv lub peev xwm tshwj xeeb qhov zoo ntawm cov cov khoom siv tau maj mam hloov cov khoom siv DWDM. Dab tsi ntawm DWDM thiab OTN sib txawv?
1.Qhov lub tswv yim sib txawv ntawm DWDM thiab OTN
DWDM: Dense Wavelength Division Multiplexing (DWDM: Dense Wavelength Division Multiplexing) yog nyob ze lub qhov rai nrog nthwv dej ntawm 1550nm, nyob rau hauv qhov ntau uas EDFA tuaj yeem muab nce, sib txuas ntau lub teeb yoj mus rau hauv ib pawg ntawm lub teeb yoj yoj thiab kis nws nrog ib leeg. Laser thev naus laus zis ua kom nce bandwidth ntawm cov leeg qaum. Ntau qhov tseeb, cov txheej txheem yog los txuas rau lub suab sib luag ze ntawm ib lub xaib fiber ntau hauv ib txheej txheem fiber ntau txhawm rau siv qhov ua tiav kev xa mus zoo (piv txwv li, kom ua tiav qhov tsawg tshaj plaws ntawm kev tawg lossis qhov ua kom zoo). Ua li no, raws li qhov muab cov ntaub ntawv sib kis muaj peev xwm, tag nrho cov xov tooj ntawm cov kho qhov muag yuav tsum raug txo kom tsawg.
OTN (Optical Thauj Network) yog cov xaib sib kis raws li yoj sib faib lub tshuab sib txuas ntau yam thiab ua kom muaj lub network ntawm cov txheej kho qhov muag. Nws yog tus txuas rau tiam tom ntej xa sib txuas network. OTN switching module ntxiv rau cov thev naus laus zis, kom cov kab ke muaj peev xwm hloov kho cov kev pabcuam kev sib txuas lus, nthuav dav, txhawb nqa, thiab nce cov neeg siv cov ntaub ntawv, thiab txhim kho cov kev sib txuas lus hauv kev sib txuas lus hauv network, yog li daws qhov teeb meem WDM network tsis muaj yoj yuag / sub-wavelength teeb meem xws li kev pabcuam poob haujlwm tsis muaj peev xwm, lub peev xwm tiv thaiv tsis muaj zog, thiab kev tiv thaiv muaj zog.
2.Different cov cim hom
DWDM thev naus laus zis tsis muaj cov qauv sib xws. Thaum lub sijhawm ua haujlwm, lub nthwv dej ntawm ib lub teeb liab tau hloov mus rau kev yoj hluav taws xob sib txuas rau lub network sib txuas lus los ntawm lub hloov khoom siv, thiab qhov kis tau tus mob wavelength yog multiplexed los ntawm kev siv thev naus laus zis.
OTN muaj tag nrho cov qauv ncej. Kev teem lub sij hawm sib hloov los ntawm hluav taws xob hla kev siv tshuab tuaj yeem ua tiav SDH-zoo li hluav taws xob hla kev ua haujlwm, kom cov hais me me tuaj yeem ua ke thiab sib kis hauv cov channel loj. Ib qho channel ntawm OTN tseem muaj qhov loj me xws li SDH. Rau cov thawv ntim khoom me me thiab loj, OTN muaj qhov system nkag thiab ua kom muaj peev xwm txhawm rau txhim kho kev siv bandwidth. OTN thev naus laus zis tseem tuaj yeem saib xyuas cov haujlwm ua haujlwm thiab ua yuam kev ntawm cov sib txuas lus sib txuas lus hluav taws xob tsim hluav taws xob. Nyob rau hauv cov txheej txheem ntawm kev ua tsis tau zoo ntawm kev tshawb pom, OTN thev naus laus zis yog qib zoo dua.
3.Difference hauv kev koom tes thiab kev tiv thaiv cov tshuab
DWDM thev naus laus zis hom kev lag luam yog tsuas yog taw-rau-kis, txoj saw, lub hnub qub, thiab lub nplhaib sib tham. Tsuas yog qhov kev tiv thaiv ib puag ncig tau muab rau hauv hom kev tiv thaiv. Qhov kev tiv thaiv hom yog feem ntau optical multiplex ntu tiv thaiv. 1 + 1 thiab 1 yog siv rau ntawm cov txheej txheem kho qhov muag. : 1 tiv thaiv. Lub davhlau ya nyob twg khoom siv tsis tiv thaiv. Txoj kev tiv thaiv no yuav tsum tau muaj ob lub kho qhov muag. Kev tiv thaiv tus kheej ntawm DWDM kev pabcuam yog nqa tawm ntawm SDH lub nplhaib sib txuas.
OTN kev sib txuas lus feem ntau yog lub nplhaib sib txuas, mesh thiab lwm txoj hauv kev sib txuas, uas tuaj yeem muab kab 1 + 1 tiv thaiv, nthwv sab 1 + 1 tiv thaiv, tus neeg siv sab 1 + 1 tiv thaiv, ODUk tiv thaiv, txheej kho qhov muag thiab hluav taws xob txheej tiv thaiv, thiab lwm yam.
4.Business scheduling muaj peev xwm
Nyob rau hauv OTN, cov ntaub ntawv teeb tsa tuaj yeem siv rau kev sib txuas sib txuas (zoo ib yam li SDH kev pabcuam kev teeb tsa), tuaj yeem nkag mus rau ntau hom kev pabcuam tib lub sijhawm, thiab tuaj yeem paub txog kev npaj cov kev pabcuam ntse. Nws tuaj yeem muab cov txheej txheem sib xyaw ua ke muaj peev xwm ntawm optical txheej wavelength theem thiab hluav taws xob txheej sub-wavelength kev pabcuam. Optical txheej kev teem sij hawm muaj peev xwm: Cov txheej txheem kho qhov muag muab OADM wavelength scheduling txujci, uas tuaj yeem npaj ua ntej cov phiaj xwm tawm suab / tso tawm wavelengths, lossis siv AWG
Kev tawm tswv yim / tso tawm txhua qhov sib npaug, qhov sib tshooj ntawm cov kev pab sab saud thiab sab qis yuav tsum txuas nrog pawg tswj hwm, thiab qhov wavelengths ntawm qhov kev pabcuam sab saud thiab qis tsis tas yuav siv sijhawm pigtail jumper. Cov txheej txheem hluav taws xob muaj peev xwm: Muab cov hluav taws xob faib tawm ntawm ODU0 / ODU1 / ODU2 / ODU2e / ODU3 / ODU4 hais tawm, thiab qhov cuam tshuam ntawm cov qhov hluav taws xob uas nyob ib sab muaj txog li 100 / 200Gbps.
