OTN (Optical Transport Network) ndi netiweki yotumizira yomwe imakonza maukonde pagawo la kuwala kutengera ukadaulo wa wavelength division multiplexing.

Ndi msana kufala network ya m'badwo wotsatira.Mwachidule, ndiwavelength yotengera m'badwo wotsatira.

OTN ndi netiweki yamayendedwe yotengera ukadaulo wa wavelength division multiplexing womwe umakonza netiweki pamalo owoneka bwino, ndipo ndi njira yoyendera yam'mbuyo yam'badwo wotsatira. OTNndi mbadwo watsopano wa "digital transmission system" ndi "optical transmission system" yoyendetsedwa ndi ndondomeko za ITU-T monga G.872, G.709, ndi G.798.Idzathetsa vuto la mautumiki opanda mafunde / sub-wavelength mumayendedwe achikhalidwe a WDM.Mavuto monga kusakonza bwino kwadongosolo, kufooka kwa maukonde, komanso kufooka kwa chitetezo.OTN imathetsa zovuta zingapo zamachitidwe azikhalidwe kudzera pama protocol angapo.
OTN imayenderana ndi dera lachikhalidwe lamagetsi (ma digito) ndi optical domain (kutumiza kwa analogi), ndipo ndi mulingo wogwirizana pakuwongolera madera amagetsi ndi kuwala.
Chinthu choyambirira cha Kusintha kwa OTNndi bizinesi ya wavelength-level, yomwe imakankhira netiweki yamayendedwe mpaka pamlingo wowona wa multi-wavelength optical network.Chifukwa cha kuphatikiza kwa ubwino wa kuwala kwa magetsi ndi magetsi, OTN ikhoza kupereka mphamvu yaikulu yotumizira, kulumikiza mapeto-to-mapeto a wavelength / sub-wavelength ndi chitetezo chonyamula katundu, ndipo ndi teknoloji yabwino kwambiri yotumizira burodibandi yaikulu. -Tinthu ntchito.

mwayi waukulu

Ubwino waukulu wa OTN ndikuti umagwirizana kwathunthu m'mbuyo, ukhoza kumanga pa ntchito zoyang'anira SONET / SDH zomwe zilipo, sizimangopereka kuwonekera kwathunthu kwa ndondomeko zoyankhulirana zomwe zilipo, komanso zimaperekanso kutha-kumapeto kugwirizanitsa ndi kugwirizanitsa maukonde a WDM. , Imapereka ndondomeko ya kugwirizanitsa kwa kuwala kwa ROADM, ndikuwonjezera kuphatikizika kwa sub-wavelength ndi kudzikongoletsa.Kumapeto-kumapeto-kumapeto ndi mphamvu zogwirizanitsa zimakhazikitsidwa makamaka pamaziko a SDH, ndipo chitsanzo cha mawonekedwe a kuwala chimaperekedwa.

Lingaliro la OTN limakwirira mawonekedwe a kuwala ndi magetsi osanjikiza magetsi, ndipo teknoloji yake imalandira ubwino wapawiri wa SDH ndi WDM.Zofunikira zaukadaulo ndi izi:

1. Kuyika kwa chizindikiro chamakasitomala osiyanasiyana komanso kutumizirana mowonekera Mpangidwe wa chimango wa OTN wozikidwa pa ITU-TG.709 ukhoza kuthandizira kupanga mapu ndi kufalikira kwa ma siginolo osiyanasiyana amakasitomala, monga SDH, ATM, Ethernet, ndi zina zotere. kwa SDH ndi ATM, koma kuthandizira kwa Efaneti pamitengo yosiyana ndi yosiyana.ITU-TG.sup43 imapereka malangizo owonjezera a mautumiki a 10GE kuti akwaniritse magawo osiyanasiyana a transparent transparent, pomwe a GE, 40GE, 100GE Ethernet, mautumiki apadera a netiweki Fiber Channel (FC) ndi mwayi wopeza maukonde a Gigabit Passive Optical Network (GPON) ), ndi zina zambiri. ., njira yovomerezeka ya mapu ku chimango cha OTN ikukambidwa.

2. Bandwidth multiplexing, crossover and configuration of big particles Magetsi osanjikiza a bandwidth particles ofotokozedwa ndi OTN ndi optical channel data units (O-DUk, k=0,1,2,3), yomwe ndi ODUO (GE,1000M/S) ODU1 (2.5Gb / s), ODU2 (10Gb / s) ndi ODU3 (40Gb / s), bandwidth granularity ya kuwala wosanjikiza ndi wavelength, poyerekeza ndi granularity ndandanda wa SDH VC-12 / VC-4, OTN multiplexing, crossover ndi The particles kusinthidwa mwachionekere zazikulu kwambiri, amene akhoza kwambiri kusintha kusintha ndi kufala Mwachangu wa mkulu-bandwidth deta kasitomala ntchito.

3. Mphamvu zamphamvu zowongolera ndi kukonza zowongolera OTN imapereka mphamvu zowongolera zofananira ndi SDH, ndipo mawonekedwe a OTN a OTN Optical Channel (OCh) wosanjikiza amakulitsa kwambiri kuthekera kowunika kwa digito pagawoli.Kuphatikiza apo, OTN imaperekanso ntchito ya 6-layer nested serial connection monitoring (TCM), yomwe imapangitsa kuti zitheke kuyang'anira magwiridwe antchito kumapeto ndi kumapeto kwa nthawi imodzi pa intaneti ya OTN.Amapereka njira zoyendetsera zoyenera zotumizira ma trans-operator.

4. Kupititsa patsogolo maukonde ndi chitetezo Kuthekera Kupyolera mu kukhazikitsidwa kwa mawonekedwe a OTN frame, ODUk crossover ndi multi-dimensional reconfigurable optical add-drop multiplexer (ROADM), luso la intaneti la optical transport network lawonjezeka kwambiri, ndipo SDHVC-based 12 / VC-4 kukonza bandwidth ndi momwe zilili za WDM point-to-point yopereka mphamvu zazikulu zotumizira bandwidth.Kukhazikitsidwa kwaukadaulo wa Forward error correction (FEC) kumawonjezera kwambiri mtunda wa kufalikira kwa wosanjikiza.Kuphatikiza apo, OTN ipereka magwiridwe antchito osinthika achitetezo kutengera magetsi osanjikiza ndi kuwala kwa kuwala, monga ODUk-based photonic network network protection (SNCP) komanso chitetezo chogawana pamanetiweki a mphete, njira yowunikira yopangidwa ndi kuwala kapena gawo la multiplex, ndi zina zotero. Koma luso logawana mphete silinakhazikitsidwebe.