OTN-Optical Transport Network yog dab tsi?
Nrog rau kev tawg ntawm cov tsheb khiav digital thiab qhov kev loj hlob ntawm kev siv bandwidth- tshaib plab, Optical Transport Network (OTN) hloov zuj zus los ntawmpoint-to-point DWDMcov kev kho rau scalable thiab robust optical networking daim ntaub ntawv uas cater rau ib tug ntau yam ntawm cov neeg siv cov teeb liab nrog sib npaug-varied cov kev pab cuam. Cov neeg nqa khoom tseem tab tom tso ib qho tshwj xeeb rau OTN hauv cheeb tsam Metro, qhov twg nws tau hloov pauv sai ntawm SONET / SDH mus rau wavelength-division multiplexing (WDM). Nrog rau lub hom phiaj ntawm kev txhawb nqa bandwidth thiab nce kev ua haujlwm hauv lub network, OTN muab txoj hauv kev los txhawb cov tsheb sib txawv ntawm tus nqi zoo dua li kev siv SONET / SDH tes hauj lwm.
Dab tsi yogOTN Network?
Txhais los ntawm ITU Telecommunication Standardization Sector (ITU-T), OTN yog digital wrapper thev naus laus zis uas muab txoj hauv kev tau txais txiaj ntsig zoo thiab thoob ntiaj teb rau ntau yam kev pabcuam sib txawv mus rau txoj hauv kev kho qhov muag. OTN thev naus laus zis lossis digital wrapper thev naus laus zis muab lub luag haujlwm thoob plaws hauv lub network uas ntxiv SONET / SDH zoo li cov khoom siv rau WDM. Nws tsim cov pob tshab, hierarchical network tsim los siv rau ob qho tib si WDM thiab TDM. (Ntau cov ntaub ntawv hais txog WDM thiab TDM systems muaj nyob rau hauv Optical Wavelength Bands Evolution.)
OTN koom ua ke ua haujlwm ntawm kev thauj mus los, multiplexing, routing, tswj, thiab saib xyuas, thiab tsim OTN tus neeg siv khoom (xws li SONET/SDH, IP, ATM) kev sib txuas hauv Metro thiab Core networks. Niaj hnub no, nws tau dav siv nyob rau hauv metro, cheeb tsam, thiab ntev-ntev DWDM pob ntawv-kho qhov muag thauj network.
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