Ndi netiweki yotumizira mauthenga ya m'badwo wotsatira. Mwachidule, ndi netiweki yotumizira mauthenga ya m'badwo wotsatira yomwe imagwiritsa ntchito mafunde.
OTN ndi netiweki yoyendera yozikidwa pa ukadaulo wogawa ma wavelength multiplexing womwe umakonza netiwekiyo pa optical layer, ndipo ndiye netiweki yoyendera ya m'badwo wotsatira. OTNndi mbadwo watsopano wa "makina otumizira mawayilesi a digito" ndi "makina otumizira mawayilesi owoneka bwino" omwe amayendetsedwa ndi malingaliro angapo a ITU-T monga G.872, G.709, ndi G.798. Idzathetsa vuto la ntchito zopanda ma wavelength/sub-wavelength m'ma network achikhalidwe a WDM. Mavuto monga kusatha kukonza nthawi, kufooka kwa ma network, komanso kufooka kwa chitetezo. OTN imathetsa mavuto angapo a machitidwe achikhalidwe kudzera m'ma protocol angapo.
OTN imagwiritsa ntchito malo achikhalidwe amagetsi (kutumiza kwa digito) ndi malo owonera (kutumiza kwa analog), ndipo ndi muyezo wogwirizana wowongolera malo amagetsi ndi owonera.
Cholinga chachikulu cha Kukonza kwa OTNNdi bizinesi yoyendera mafunde, yomwe imakankhira netiweki yoyendera kufika pagawo la netiweki yeniyeni ya mafunde ambiri. Chifukwa cha kuphatikiza kwa ubwino wa ma domain optical ndi domain yamagetsi, OTN imatha kupereka mphamvu yayikulu yotumizira mauthenga, kulumikizana kowonekera bwino kwa mafunde/mafunde ang'onoang'ono komanso chitetezo cha gulu lonyamula, ndipo ndi ukadaulo wabwino kwambiri wotumizira mautumiki akuluakulu a broadband.
ubwino waukulu
Ubwino waukulu wa OTN ndikuti imagwirizana kwathunthu ndi kumbuyo, imatha kumangidwa pa ntchito zomwe zilipo za SONET/SDH, sikuti imangopereka kuwonekera bwino kwa ma protocol omwe alipo, komanso imapereka kulumikizana kochokera kumapeto mpaka kumapeto ndi kuthekera kwa ma network a WDM, Imapereka mawonekedwe a kulumikizana kwa optical layer kwa ROADM, komanso imathandizira kusonkhanitsa ndi kukonza kwa sub-wavelength. Mphamvu zolumikizirana zoyambira kumapeto mpaka kumapeto ndi ma network zimakhazikitsidwa makamaka pamaziko a SDH, ndipo chitsanzo cha optical layer chimaperekedwa.
Lingaliro la OTN limakhudza mawonekedwe a kuwala ndi netiweki yamagetsi, ndipo ukadaulo wake umalandira zabwino ziwiri za SDH ndi WDM. Zinthu zazikulu zaukadaulo ndi izi:
1. Kuyika chizindikiro cha kasitomala ndi kutumiza mowonekera Kapangidwe ka chimango cha OTN kozikidwa pa ITU-TG.709 kangathandize kupanga mapu ndi kutumiza mowonekera kwa zizindikiro zosiyanasiyana za kasitomala, monga SDH, ATM, Ethernet, ndi zina zotero. Kuyika chizindikiro chodziwika bwino ndi kutumiza mowonekera kumatha kuchitika pa SDH ndi ATM, koma chithandizo cha Ethernet pamitengo yosiyana ndi chosiyana. ITU-TG.sup43 imapereka malangizo owonjezera pa ntchito za 10GE kuti zikwaniritse madigiri osiyanasiyana a kutumiza mowonekera, pomwe pa GE, 40GE, 100GE Ethernet, ntchito zapaintaneti zachinsinsi Fibre Channel (FC) ndi ntchito zapaintaneti za Gigabit Passive Optical Network (GPON) ), ndi zina zotero, njira yokhazikika yopangira mapu ku chimango cha OTN ikukambidwa pakadali pano.
2. Kuchulukitsa kwa Bandwidth, kusinthasintha ndi kasinthidwe ka tinthu tating'onoting'ono tamagetsi. Tinthu tating'onoting'ono tamagetsi tomwe timafotokozedwa ndi OTN ndi mayunitsi a data ya optical channel (O-DUk, k=0,1,2,3), omwe ndi ODUO(GE,1000M/S)ODU1 (2.5Gb/s), ODU2 (10Gb/s) ndi ODU3 (40Gb/s), kuchuluka kwa bandwidth ya optical layer ndi wavelength, poyerekeza ndi kuchuluka kwa scheduling kwa SDH VC-12/VC-4, OTN multiplexing, crossover ndi. Tinthu ta configured ndi tambirimbiri, zomwe zingathandize kwambiri kusintha ndi kutumiza bwino kwa ntchito zamakasitomala a data ya bandwidth yapamwamba.
3. Mphamvu zamphamvu zowongolera ndi kukonza OTN imapereka mphamvu zowongolera monga SDH, ndipo kapangidwe ka chimango cha OTN cha OTN Optical Channel (OCh) chimathandizira kwambiri luso lowunikira digito la gawoli. Kuphatikiza apo, OTN imaperekanso ntchito ya 6-layer nested serial connection monitoring (TCM), yomwe imapangitsa kuti zitheke kuchita kuwunika magwiridwe antchito kuyambira kumapeto mpaka kumapeto komanso magawo angapo nthawi imodzi panthawi ya OTN networking. Imapereka njira zoyenera zowongolera zotumizira mauthenga pakati pa ogwiritsa ntchito.
4. Kulimbitsa mphamvu zolumikizirana ndi chitetezo Kudzera mu kuyambitsa kapangidwe ka chimango cha OTN, ODUk crossover ndi multi-dimensional reconfigurable optical add-drop multiplexer (ROADM), mphamvu zolumikizirana za netiweki yoyendera ya optical yakulitsidwa kwambiri, ndipo bandwidth yokhazikika ya 12/VC-4 scheduling bandwidth ndi momwe zinthu zilili pa WDM point-to-point zomwe zimapereka bandwidth yotumizira yayikulu. Kugwiritsa ntchito ukadaulo wa forward error correction (FEC) kumawonjezera kwambiri mtunda wa optical layer transmission. Kuphatikiza apo, OTN ipereka ntchito zoteteza ntchito zosinthika kutengera layer yamagetsi ndi layer yamagetsi, monga ODUk layer-based photonic network connection protection (SNCP) ndi shared ring network protection, optical layer-based optical channel kapena multiplex section protection, ndi zina zotero. Koma ukadaulo wogawana ring sunakhazikitsidwebe.
Nthawi yotumizira: Novembala-01-2022