OTN (Optical Transport Network) numuyoboro wohereza utegura imiyoboro kumurongo wa optique ushingiye kubuhanga bwo kugabana umurongo wa tekinoroji.

Numuyoboro wumugongo wohereza ibisekuruza bizaza.Muri make, ni umuhengeri ushingiye kumurongo wo gutwara abantu.

OTN numuyoboro wogutwara ushingiye kumurongo wogukwirakwiza kugwiza tekinoroji itunganya urusobe kurwego rwa optique, kandi numuyoboro wogutwara umugongo wibisekuruza bizaza. OTNni igisekuru gishya cya "sisitemu yo kohereza amakuru" na "sisitemu yo kohereza optique" igengwa nuruhererekane rw'ibyifuzo bya ITU-T nka G.872, G.709, na G.798.Bizakemura ikibazo cyo kutagira umurongo wa serivisi / munsi-yumurongo wa serivise ya WDM gakondo.Ibibazo nkubushobozi buke bwo guteganya, ubushobozi bwurusobekerane, hamwe nubushobozi buke bwo kurinda.OTN ikemura urukurikirane rwibibazo byinshi bya sisitemu gakondo binyuze murukurikirane rwa protocole.
OTN ikubiyemo imiyoboro gakondo y'amashanyarazi (itumanaho rya digitale) hamwe na optique (ikwirakwizwa rya analog), kandi ni urwego ruhuriweho rwo gucunga amashanyarazi na optique.
Ikintu cyibanze cya Gutunganya OTNni ubucuruzi bwurwego-rwubucuruzi, rusunika umuyoboro wubwikorezi kurwego rwukuri rwinshi-rwinshi rwa optique.Bitewe no guhuza ibyiza bya optique ya optique hamwe nogutunganya amashanyarazi, OTN irashobora gutanga ubushobozi bunini bwogukwirakwiza, mucyo rwose kurangira-kurangira-kurangira / guhuza umurongo-wo-kurinda no gutwara ibyiciro, kandi nubuhanga bwiza bwo kohereza umurongo mugari -ibikorwa bya serivisi.

inyungu nyamukuru

Inyungu nyamukuru ya OTN nuko isubira inyuma rwose, irashobora gushingira kumikorere isanzwe ya SONET / SDH yo kuyobora, ntabwo itanga gusa umucyo wuzuye wa protocole y'itumanaho iriho, ahubwo inatanga umurongo wanyuma-wanyuma hamwe nubushobozi bwo guhuza imiyoboro ya WDM , Itanga ibisobanuro bya optique layer ihuza ROADM, ikanuzuza sub-wavelength igiteranyo hamwe nubushobozi bwo gutunganya.Ihuza-iherezo-iherezo hamwe nubushobozi bwo guhuza imiyoboro yashizweho ahanini hashingiwe kuri SDH, kandi hatanzwe icyitegererezo cya optique.

Igitekerezo cya OTN gikubiyemo urwego rwa optique hamwe numuyoboro wamashanyarazi, kandi tekinoroji yacyo iragwa ibyiza bibiri bya SDH na WDM.Ibyingenzi byingenzi bya tekiniki nibi bikurikira:

1. Ibimenyetso bitandukanye byabakiriya bikwirakwizwa no gukwirakwiza mu mucyo Imiterere yikadiri ya OTN ishingiye kuri ITU-TG.709 irashobora gushyigikira ikarita nogukwirakwiza mu buryo bweruye ibimenyetso byabakiriya bitandukanye, nka SDH, ATM, Ethernet, nibindi. kuri SDH na ATM, ariko inkunga ya Ethernet kubiciro bitandukanye iratandukanye.ITU-TG. ., uburyo busanzwe bwo gushushanya ikarita ya OTN ikomeje kuganirwaho.

2. Umuyoboro mugari, kwambukiranya no kugena ibice binini Amashanyarazi yumurongo wumurongo wamashanyarazi wasobanuwe na OTN ni ibice byamakuru ya optique (O-DUk, k = 0,1,2,3), aribyo ODUO (GE, 1000M / S) ODU1 . Ibice byagenwe biragaragara ko ari binini cyane, bishobora guteza imbere cyane uburyo bwo guhuza n'imihindagurikire y’imikorere ya serivisi y’abakiriya benshi.

3. Ubushobozi bukomeye bwo kuyobora no gufata neza OTN itanga ubushobozi bwo gucunga hejuru isa na SDH, kandi imiterere ya OTN imiterere ya OTN Optical Channel (OCh) igabanya cyane ubushobozi bwo kugenzura imibare yiki cyiciro.Mubyongeyeho, OTN itanga kandi ibice 6 byubatswe bikurikirana bikurikirana (TCM), ibyo bigatuma bishoboka gukora amaherezo kugeza ku ndunduro hamwe nibice byinshi bikurikirana icyarimwe mugihe cya OTN.Itanga uburyo bukwiye bwo gucunga uburyo bwo kohereza.

4 / V.Iyemezwa rya tekinoroji yo gukosora (FEC) byongera cyane intera yo kohereza optique.Mubyongeyeho, OTN izatanga serivisi zoroshye zo gukingira serivisi zishingiye ku mashanyarazi n’urwego rwa optique, nka ODUk igendeye kuri fotonike ihuza imiyoboro (SNCP) hamwe no kurinda imiyoboro ihuza impeta, imiyoboro ya optique ishingiye ku miyoboro ya optique cyangwa kurinda ibice byinshi, n'ibindi. . Ariko ikoranabuhanga risangiwe ntirisanzwe.