OTN (Optical Transport Network) ni umuyoboro w’itumanaho utunganya imiyoboro ku rwego rw’ingufu zikoresha ikoranabuhanga ryo gukwirakwiza ubunini bw’urumuri.

Ni umuyoboro w’ingufu w’ihererekanyamakuru ry’ikinyagihumbi gitaha. Mu magambo make, ni umuyoboro w’ihererekanyamakuru ry’ikinyagihumbi gitaha ushingiye ku bunini bw’urumuri.

OTN ni umuyoboro w’ubwikorezi ushingiye ku ikoranabuhanga ryo gukwirakwiza ubunini bw’umuraba uhuza urusobe rw’amashanyarazi, utunganya umuyoboro ku gice cy’urumuri, kandi ni wo muyoboro w’ubwikorezi bw’isekuruza itaha. OTNni igisekuru gishya cya "sisitemu yo kohereza amakuru mu buryo bw'ikoranabuhanga" na "sisitemu yo kohereza amakuru mu buryo bw'amajwi" igenzurwa n'urukurikirane rw'inama za ITU-T nka G.872, G.709, na G.798. Izakemura ikibazo cyo kutagira serivisi z'uburebure bw'umurambararo/ubugari bw'umuraba mu miyoboro gakondo ya WDM. Ibibazo nko kuba nta bushobozi bwo gushyira ku murongo, ubushobozi buke bwo kohereza amakuru mu buryo bw'amajwi, n'ubushobozi buke bwo kurinda. OTN ikemura ibibazo byinshi bya sisitemu gakondo binyuze mu rukurikirane rw'amabwiriza.
OTN ikoresha urwego rusanzwe rw'amashanyarazi (kohereza amakuru mu buryo bw'ikoranabuhanga) n'urwego rw'amashanyarazi (kohereza amakuru mu buryo bw'ikoranabuhanga ...
Intego y'ibanze ya Gutunganya OTNni ubucuruzi bwo ku rwego rw'uburebure bw'umuraba, butuma umuyoboro w'ubwikorezi ugera ku rwego rw'umuyoboro nyawo w'uburebure bw'umuraba mwinshi. Bitewe n'inyungu zo gutunganya imiterere y'umuraba n'amashanyarazi, OTN ishobora gutanga ubushobozi bwo kohereza ubutumwa bwinshi, guhuza uburebure bw'umuraba kuva ku mpera kugeza ku mpera ndetse no kurinda urwego rw'umuraba, kandi ni ikoranabuhanga ryiza cyane ryo kohereza serivisi za interineti nini.

inyungu nyamukuru

Akamaro nyamukuru ka OTN ni uko ihuza neza inyuma, ishobora kubakira ku mikorere ya SONET/SDH isanzweho, ntabwo itanga gusa ubwisanzure bwuzuye bwa protocole z'itumanaho zisanzweho, ahubwo inatanga ubushobozi bwo guhuza kuva ku mpera kugeza ku mpera no guhuza WDM, Itanga uburyo bwo guhuza urwego rw'amashanyarazi kuri ROADM, kandi ikongera ubushobozi bwo guteranya no gutunganya urwego rw'amashanyarazi. Ubushobozi bwo guhuza kuva ku mpera kugeza ku mpera n'ubw'itumanaho bushingiye ahanini kuri SDH, kandi hatangwa icyitegererezo cy'urwego rw'amashanyarazi.

Igitekerezo cya OTN gikubiyemo urwego rw'amashanyarazi n'urusobe rw'amashanyarazi, kandi ikoranabuhanga ryacyo rizungura inyungu ebyiri za SDH na WDM. Ibiranga tekiniki by'ingenzi ni ibi bikurikira:

1. Gushyira ibimenyetso bitandukanye by'umukiriya hamwe n'uburyo bwo kohereza amakuru mu buryo bugaragara Imiterere ya OTN frame ishingiye kuri ITU-TG.709 ishobora gushyigikira uburyo bwo gushushanya no kohereza amakuru mu buryo bugaragara bw'ibimenyetso bitandukanye by'umukiriya, nka SDH, ATM, Ethernet, nibindi. Uburyo busanzwe bwo gukusanya amakuru no kohereza amakuru mu buryo bugaragara bushobora kugerwaho kuri SDH na ATM, ariko inkunga ya Ethernet ku gipimo gitandukanye iratandukanye. ITU-TG.sup43 itanga inama z'inyongera kuri serivisi za 10GE kugira ngo hagerwe ku byiciro bitandukanye byo kohereza amakuru mu buryo bugaragara, mu gihe kuri GE, 40GE, 100GE Ethernet, serivisi z'imiyoboro yihariye ya Fibre Channel (FC) na serivisi z'imiyoboro yo kwinjira Gigabit Passive Optical Network (GPON)), nibindi, uburyo busanzwe bwo gushushanya amakuru mu buryo bugaragara bw'uburyo ...kwirakwiza amakuru mu buryo bugaragara bw'uburyo bwo gukwirakwiza amakuru mu buryo bugaragara bw'uburyo bwo gukwirakwiza amakuru mu buryo bugaragara bw'uburyo bwo gukwirakwiza amakuru mu buryo bugaragara bw'uburyo bwo gukwirakwiza amakuru mu buryo bugaragara bw'uburyo bwo gukwirakwiza amakuru mu buryo bugaragara bw'ikoranabuhanga (GPON)), nibindi, ubu burimo kuganirwaho ku buryo bwo gushushanya amakuru mu buryo busanzwe bw'uburyo bwo gushushanya amakuru mu buryo bugaragara bw'ikoranabuhanga.

2. Guhinduranya uburebure bw'umurambararo, guhindagurika no gushyiraho imiterere y'uduce tunini. Uduce tw'uburebure bw'umurambararo dusobanurwa na OTN ni units z'amakuru y'umuyoboro wa optique (O-DUk, k=0,1,2,3), ari zo ODUO(GE,1000M/S)ODU1 (2.5Gb/s), ODU2 (10Gb/s) na ODU3 (40Gb/s), uburebure bw'umurambararo bw'umurambararo bw'umurambararo ni uburebure bw'umurambararo, ugereranije n'ubunini bwa gahunda ya SDH VC-12/VC-4, OTN multiplexing, crossover na Uduce twashyizweho biragaragara ko ari tunini cyane, bishobora kunoza cyane uburyo bwo guhuza no kohereza amakuru ku buryo bwo hejuru.

3. Ubushobozi bukomeye bwo gucunga ibijyanye n'ubwikorezi bw'amashanyarazi no kubungabunga OTN itanga ubushobozi bwo gucunga ibijyanye n'ubwikorezi bw'amashanyarazi nk'ubwa SDH, kandi imiterere ya OTN y'urwego rwa OTN Optical Channel (OCh) yongera cyane ubushobozi bwo kugenzura ikoranabuhanga bw'uru rwego. Byongeye kandi, OTN itanga kandi imikorere ya TCM ifite ibyiciro 6, ituma bishoboka gukora igenzura ry'imikorere kuva ku mpera kugeza ku mpera ndetse no mu bice byinshi icyarimwe mu gihe cy'itumanaho rya OTN. Itanga uburyo bukwiye bwo gucunga uburyo bwo kohereza amakuru hagati y'abakoresha.

4. Kongera ubushobozi bwo gukoresha itumanaho no kurinda Binyuze mu gushyiraho imiterere ya OTN frame, ODUk crossover na multi-dimensional reconfigurable optical add-drop multiplexer (ROADM), ubushobozi bwo gukoresha itumanaho ry’umuyoboro w’itumanaho ry’amatara bwariyongereye cyane, kandi uburyo bwa SDHVC-based 12/VC-4 scheduling bandwidth hamwe n’uko ibintu bimeze muri WDM point-to-point bitanga bandwidth nini yo kohereza amakuru. Gukoresha ikoranabuhanga ryo gukosora amakosa yo mu nzira (FEC) byongera cyane intera yo kohereza amakuru y’amatara. Byongeye kandi, OTN izatanga serivisi zoroshye zo kurinda hashingiwe ku urwego rw’amashanyarazi n’urwego rw’amashanyarazi, nko kurinda ikoranabuhanga rya ODUk (SNCP) no kurinda uruziga rw’impeta, kurinda uruziga rw’amatara cyangwa uburyo bwa multiplex, nibindi. Ariko ikoranabuhanga rya ring risanzwe ntirirashyirwaho.