Ke marang-rang a phetiso ea mokokotlo oa moloko o latelang.Ka mantsoe a bonolo feela, ke marang-rang a lipalangoang tse thehiloeng molokong o latelang oa wavelength.
OTN ke marang-rang a lipalangoang a thehiloeng ho thekenoloji ea "wavelength division multiplexing" e hlophisang marang-rang sebakeng sa optical layer, 'me ke mokokotlo oa lipalangoang tsa moloko o latelang. OTNke moloko o mocha oa "digital transmission system" le "optical transmission system" e laoloang ke letoto la litlhahiso tsa ITU-T tse kang G.872, G.709, le G.798.E tla rarolla bothata ba ho se be le wavelength / sub-wavelength lits'ebeletso tsa marang-rang a setso a WDM.Mathata a kang bokhoni bo fokolang ba kemiso, bokhoni bo fokolang ba marang-rang, le matla a fokolang a tšireletso.OTN e rarolla letoto la mathata a 'maloa a litsamaiso tsa setso ka letoto la liprothokholo.
OTN e akaretsa sebaka sa motlakase sa setso (phetiso ea dijithale) le sebaka sa optical (phetiso ea analog), 'me ke maemo a kopaneng a ho laola libaka tsa motlakase le tsa optical.
Ntho ea mantlha ea Ts'ebetso ea OTNke khoebo ea boemo ba wavelength, e sutumelletsang marang-rang a lipalangoang ho ea sethaleng sa marang-rang a 'nete a multi-wavelength optical network.Ka lebaka la motsoako oa melemo ea optical domain le ts'ebetso ea motlakase ea motlakase, OTN e ka fana ka matla a maholo a phetisetso, khokahanyo e hlakileng ea ho qetela ho isa qetellong ea wavelength / sub-wavelength le tšireletso ea sehlopha sa bajari, 'me ke theknoloji e nepahetseng bakeng sa ho fetisa marang-rang a maholo. - Litšebeletso tsa karoloana.
molemo o ka sehloohong
Molemo o ka sehloohong oa OTN ke hore o lumellana ka ho feletseng ka morao, o ka haha mesebetsing e teng ea tsamaiso ea SONET / SDH, ha e fane feela ka ho hlaka ho feletseng ha liprothokholo tsa puisano tse teng, empa hape e fana ka khokahanyo ea ho qetela le bokhoni ba marang-rang bakeng sa WDM. , E fana ka litlhaloso tsa optical layer interconnection bakeng sa ROADM, 'me e tlatselletsa bokhoni ba ho kopanya le ho itlhoekisa ka sub-wavelength.Khokahano ea ho qetela le bokhoni ba marang-rang bo thehiloe haholo-holo motheong oa SDH, 'me ho fanoa ka mohlala oa lera la optical.
Mohopolo oa OTN o akaretsa lera la optical le marang-rang a marang-rang a motlakase, 'me theknoloji ea eona e rua melemo e' meli ea SDH le WDM.Lintlha tsa bohlokoa tsa tekheniki ke tse latelang:
1. Mefuta e fapa-fapaneng ea li-client signal encapsulation le transparent transparent Sebopeho sa foreimi ea OTN e thehiloeng ho ITU-TG.709 e ka tšehetsa 'mapa le phetisetso e hlakileng ea lipontšo tse fapa-fapaneng tsa bareki, tse kang SDH, ATM, Ethernet, joalo-joalo. bakeng sa SDH le ATM, empa tšehetso ea Ethernet ka litekanyetso tse fapaneng e fapane.ITU-TG.sup43 e fana ka likhothaletso tsa tlatsetso bakeng sa lits'ebeletso tsa 10GE ho fihlela likhato tse fapaneng tsa phetisetso e hlakileng, ha GE, 40GE, 100GE Ethernet, lits'ebeletso tsa marang-rang tsa poraefete Fiber Channel (FC) le lits'ebeletso tsa marang-rang Gigabit Passive Optical Network (GPON) ), joalo-joalo. ., mokhoa o tloaelehileng oa 'mapa oa foreimi ea OTN hajoale o ntse o buisanoa.
2. Bandwidth multiplexing, crossover le configuration ea likaroloana tse kholo Likaroloana tsa bandwidth ea layer ea motlakase tse hlalosoang ke OTN ke lisebelisoa tsa data tsa optical channel (O-DUk, k=0,1,2,3), e leng ODUO (GE,1000M/S) ODU1 (2.5Gb / s), ODU2 (10Gb / s) le ODU3 (40Gb / s), bandwidth granularity ea optical layer ke wavelength, ha e bapisoa le granularity ea kemiso ea SDH VC-12 / VC-4, multiplexing ea OTN, crossover le The configured particles ho hlakile hore e kholoanyane haholo, e leng se ka ntlafatsang haholo ho ikamahanya le maemo le katleho ea phetisetso ea litšebeletso tsa bareki ba data tse phahameng.
3. Matla a matla a ho laola le ho boloka tlhokomelo ea OTN e fana ka bokhoni ba ho laola ka holimo ho tšoana le SDH, 'me sebopeho sa foreimi ea OTN ea OTN Optical Channel (OCh) lera e ntlafatsa haholo bokhoni ba ho shebella digital ba lera lena.Ntle le moo, OTN e boetse e fana ka ts'ebetso ea 6-layer nested serial connection monitoring (TCM), e etsang hore ho khonehe ho etsa tlhahlobo ea ts'ebetso ea ho qetela le ea likarolo tse ngata ka nako e le 'ngoe nakong ea marang-rang a OTN.E fana ka mekhoa e nepahetseng ea tsamaiso bakeng sa phetisetso ea li-cross-operator.
4. Matla a ntlafatso a marang-rang le ts'ireletso Ka ho kenyelletsa sebopeho sa foreimi ea OTN, crossover ea ODUk le multi-dimensional reconfigurable optical add-drop multiplexer (ROADM), bokhoni ba marang-rang ba marang-rang a lipalangoang bo matlafalitsoe haholo, 'me SDHVC-based 12 / VC-4 kemiso ea bandwidth le boemo ba boemo ba WDM point-to-point ho fana ka matla a maholo a phetisetso ea motlakase.Ho amoheloa ha theknoloji ea ho lokisa phoso ea pele (FEC) ho eketsa haholo sebaka sa phetiso ea lera la optical.Ntle le moo, OTN e tla fana ka ts'ebetso e bonolo haholoanyane ea ts'ireletso ea ts'ebeletso e ipapisitseng le lera la motlakase le lesela la optical, joalo ka ts'ireletso ea khokahano ea marang-rang ea ODUk-based photonic network (SNCP) le ts'ireletso ea marang-rang e arolelanoang, kanale ea optical-based optical kapa ts'ireletso ea karolo ea multiplex, joalo-joalo. Empa theknoloji ea selikalikoe e arolelanoang ha e e-so be boemong bo tšoanang.
Nako ea poso: Nov-01-2022