Ita ce hanyar sadarwa ta kashin baya ta hanyar sadarwa na zamani na gaba.A taƙaice, cibiyar sadarwar sufuri ce ta zamani mai zuwa.
OTN hanyar sadarwar sufuri ce ta dogara da fasaha mai yawa na rabe tsawon tsayi wanda ke tsara hanyar sadarwa a layin gani, kuma ita ce hanyar sadarwar sufuri ta kashin baya na tsara mai zuwa. OTNsabon ƙarni ne na "tsarin watsawa na dijital" da "tsarin watsawa na gani" wanda aka tsara ta hanyar jerin shawarwarin ITU-T kamar G.872, G.709, da G.798.Zai magance matsalar babu tsawon zango/ƙarƙashin sabis a cibiyoyin sadarwar WDM na al'ada.Matsaloli kamar rashin iya tsara tsarawa, raunin hanyar sadarwar, da raunin kariya.OTN yana warware jerin matsaloli da yawa na tsarin gargajiya ta hanyar jerin ladabi.
OTN ya mamaye yankin lantarki na gargajiya (watsawa na dijital) da yanki na gani (watsawa na analog), kuma ƙaƙƙarfan ƙa'ida ce don sarrafa wuraren lantarki da na gani.
Ainihin abu na OTN aikikasuwanci ne na matakin tsayin tsayi, wanda ke tura hanyar sadarwar sufuri zuwa mataki na hanyar sadarwa na gani mai tsayi da yawa na gaskiya.Sakamakon haɗuwa da fa'idodin yanki na gani da sarrafa yanki na lantarki, OTN na iya samar da babbar ƙarfin watsawa, cikakkiyar madaidaiciyar tsayin raƙuman raƙuman raƙuman raƙuman raƙuman raƙuman ruwa zuwa ƙarshen ƙarshen raƙuman ruwa da kariyar dillali, kuma ita ce mafi kyawun fasaha don watsa babban bandwidth. -barbashi sabis.
babban amfani
Babban fa'idar OTN shine cewa yana dacewa da koma baya sosai, yana iya ginawa akan ayyukan gudanarwa na SONET/SDH da ake da su, ba wai kawai yana ba da cikakkiyar fayyace ka'idojin sadarwar da ake da su ba, har ma yana ba da haɗin kai-zuwa-ƙarshe da damar sadarwar WDM. , Yana ba da ƙayyadaddun haɗin haɗin haɗin kai na gani don ROADM, kuma yana haɓaka haɓakar ƙananan raƙuman ruwa da damar iya kwalliya.Ƙarshe-zuwa-ƙarshen haɗin gwiwa da damar sadarwar sadarwa an kafa su ne bisa tushen SDH, kuma an samar da samfurin ƙirar gani.
Manufar OTN ta ƙunshi Layer na gani da cibiyar sadarwa na Layer na lantarki, kuma fasahar sa ta gaji fa'idodi biyu na SDH da WDM.Mabuɗin fasahar fasaha sune kamar haka:
1. Daban-daban siginar abokin ciniki encapsulation da m watsa The OTN frame tsarin dogara ne a kan ITU-TG.709 iya tallafawa da taswira da m watsa daban-daban abokin ciniki siginar, kamar SDH, ATM, Ethernet, da dai sauransu Standard encapsulation da m watsa za a iya cimma. don SDH da ATM, amma goyan bayan Ethernet a farashi daban-daban ya bambanta.ITU-TG.sup43 yana ba da ƙarin shawarwari don sabis na 10GE don cimma digiri daban-daban na watsawa ta gaskiya, yayin da GE, 40GE, 100GE Ethernet, sabis na cibiyar sadarwar masu zaman kansu Fiber Channel (FC) da samun damar sabis na cibiyar sadarwa Gigabit Passive Optical Network (GPON) ), da sauransu. ., daidaitaccen hanyar taswira zuwa firam ɗin OTN a halin yanzu ana tattaunawa.
2. Ƙwaƙwalwar bandwidth, crossover da daidaitawa na manyan ɓangarori na lantarki Layer bandwidth barbashi da aka ayyana ta OTN sune raka'a bayanan tashar tashar gani (O-DUk, k=0,1,2,3), wato ODUO (GE,1000M/S) ODU1 (2.5Gb / s), ODU2 (10Gb / s) da ODU3 (40Gb / s), da bandwidth granularity na Tantancewar Layer ne wavelength, idan aka kwatanta da jadawalin granularity na SDH VC-12 / VC-4, OTN multiplexing, crossover. kuma Abubuwan da aka saita a fili sun fi girma, waɗanda za su iya inganta haɓakawa da watsawa na sabis na abokin ciniki na babban bandwidth.
3. Ƙarfin sama mai ƙarfi da ƙarfin kulawa da kulawa OTN yana ba da damar sarrafa sama kamar SDH, kuma tsarin tsarin OTN na OTN Optical Channel (OCh) Layer yana haɓaka ƙarfin saka idanu na dijital na wannan Layer.Bugu da ƙari, OTN kuma yana ba da aikin sa ido na haɗin gwiwa na 6-Layer Nest Serial Connect (TCM), wanda ke ba da damar yin aiki daga ƙarshen zuwa-ƙarshe da kuma sa ido kan aikin sashe da yawa a lokaci guda yayin sadarwar OTN.Yana ba da hanyoyin gudanarwa masu dacewa don watsa ma'aikata ta giciye.
4. Ingantattun hanyoyin sadarwa da damar kariya ta hanyar gabatar da tsarin firam ɗin OTN, ODUk crossover da Multi-dimensional reconfigurable optical add-drop multiplexer (ROADM), an haɓaka damar sadarwar cibiyar sadarwa ta hanyar sufuri na gani sosai, kuma SDHVC na tushen 12 / VC-4 tsara bandwidth da kuma matsayi na WDM batu-zuwa-ma'ana samar da babban damar watsa bandwidth.Amincewa da fasahar gyara kuskuren gaba (FEC) yana ƙaruwa da nisa na watsa layin gani.Bugu da kari, OTN zai samar da mafi sassauƙan ayyukan kariya na sabis dangane da layin lantarki da Layer na gani, kamar ODUk kariyar haɗin hanyar sadarwar photonic ta tushen Layer (SNCP) da kariyar cibiyar sadarwar zobe, tashar tashar gani mai tushen gani ko kariyar sashin multix, da sauransu. Amma har yanzu ba a daidaita fasahar zobe da aka raba ba.
Lokacin aikawa: Nov-01-2022