DWDM da OTN su ne tsarin fasaha guda biyu da aka haɓaka ta hanyar fasahar watsawa ta raƙuman ruwa a cikin 'yan shekarun nan: DWDM za a iya daukarsa a matsayin PDH na baya (watsawa-to-point watsa), kuma ana kammala ayyukan layi da layi akan ODF ta hanyar tsalle-tsalle;OTN yana kama da SDH (nau'ikan sadarwar sadarwa iri-iri), tare da aikin haɗin giciye (ko haɗin haɗin ginin lantarki ne ko ƙirar gani).
Tare da ci gaba da haɓaka tsarin ALL IP, a halin yanzu, ba tare da la'akari da kashin baya na ƙasa ba, kashin baya na lardi ko tsarin WDM na gida, OTN shine babban mahimmanci lokacin zabar kayan aiki a matakin farko na ginin cibiyar sadarwa.Kayan aikin OTN sun maye gurbin kayan aikin DWDM a hankali tare da fa'idodi na musamman (Kamar kayan aikin SDH da ke maye gurbin kayan aikin PDH).A matsayin sabon fasaha da sabon samfurin samfurin, OTN ya zama abin da ake mayar da hankali ga masana'antu na yanzu.Wannan labarin zai bincika da kwatanta DWDM, OTN kayan aiki da fasaha.
1 Mahimman ra'ayi na DWDM da OTN
Tare da canjin buƙatun sabis da granularity, ya zama dole a ninka manyan sabis na granularity ta hanyar filaye na gani (fiber-fiber ko dual-fiber) sannan a raba su zuwa tsayin raƙuman ruwa daban-daban don watsa nisa mai nisa.Fasahar multixing rabon tsayi yana fitowa kamar yadda lokuta ke buƙata.
DWDM shine Multiplexing rabo na tsawon tsayi (wavelength Division Multiplexing), wanda ke ninka siginar gani na mabambantan raƙuman raƙuman ruwa zuwa fiber iri ɗaya don watsawa.Fasahar WDM fasaha ce ta balagagge ta al'ada ta raba tsawon tsawon fiye da shekaru goma.Ana iya raba shi zuwa ƙayyadaddun bayanai guda biyu: rarrabuwar kawuna mai yawa (CWDM), tare da babban tazara mai tsayi (20nm);Matsakaicin raƙuman raƙuman ruwa mai yawa (DWDM), tare da ƙaramin tazara mai tsayi (kasa da ko daidai da 0.8nm).Saboda ɗan gajeren nisa na CWDM, babban adadin na'urorin DWDM ana tura su a cikin cibiyoyin sadarwar da ke akwai na masu aiki daban-daban.
Tsarin DWDM na buɗewa ya ƙunshi sassa masu zuwa: OTM yana kammala ɗaukar nauyin sabis da saukarwa don tashar tashar tashar layin gani, OA ta kammala aikin haɓaka haɓakar siginar da aka haɗa da yawa don tashar ƙara girman layin gani, kuma OTU ta cika ƙa'idar da ba ta dace ba. Hasken siginar tsawon tsayi don saduwa da G .694.1 (2) aikin jujjuyawar ma'auni na daidaitaccen siginar siginar siginar, OMU / ODU: ya kammala multixing / demultiplexing na G.694.1 (2) kafaffen siginar siginar madaidaiciya, OBA (amplifier iko) yana inganta. Ƙarfin siginar da aka haɗa ta hanyar haɓakawa, ta haka yana ƙara ƙarfin fitarwa na kowane tsayin tsayi, kuma OPA (pre-amplification) yana inganta ƙwarewar karɓar kowane tsayin tsayi ta hanyar ƙara ƙarfin gani na shigarwar sigina mai yawa.
OTN hanyar sadarwa ce ta hanyar sufurin gani (Optical Transport Network), kuma aka sani da OTH (Hierarchy Transport) a cikin ITU-T.An ɓullo da shi bisa ga tsarin rabe-rabe na al'ada kuma ya haɗa fa'idodin DWDM da SDH.Yana haɗu da fa'idodin yanki na gani da sarrafa yanki na lantarki, yana ba da babban ƙarfin watsawa, cikakkiyar madaidaicin ƙarshen raƙuman raƙuman raƙuman raƙuman raƙuman raƙuman raƙuman raƙuman raƙuman raƙuman raƙuman ruwa / raƙuman raƙuman raƙuman raƙuman raƙuman ruwa da kariyar matakin ɗaukar kaya, kuma fasaha ce mai kyau don watsa manyan ayyuka na babban barbashi.A cikin shekaru biyar da suka gabata, masu aiki sun tura kayan aikin OTN akan babban sikeli a cikin hanyoyin sadarwa daban-daban.
2 Kwatanta halayen fasaha na DWDM da OTN
Kodayake tsarin DWDM yana inganta ingantaccen watsawa na filaye na gani kuma yana goyan bayan watsa manyan ayyuka na granularity, saboda iyakancewar fasahar rarraba raƙuman raƙuman ruwa, ana daidaita tsayin raƙuman raƙuman raƙuman ruwa a cikin tsari-zuwa-aya kuma ba za a iya daidaita shi da ƙarfi ba.Adadin amfani da albarkatu bai yi girma ba, kuma sassaucin daidaitawar sabis bai isa ba.Gudun kasuwancin ya canza, kuma yana da wahala sosai don daidaitawa.Tsare-tsare tsakanin ayyukan DWDM shine tsarin tsarin jiki akan ODF.Gudanar da cibiyar sadarwa kawai yana sa ido kan aikin Layer na gani (bytes gudanarwar cibiyar sadarwa kaɗan ne kuma bayanan gudanarwar cibiyar sadarwa yana da sauƙi), kuma akwai ƴan hanyoyin magance matsala da babban wahalar kulawa.
OTN ya gaji babban aikin watsawa na DWDM kuma yana da daidaita tsarin haɗin gwiwar optoelectronic da damar kariya.Ta hanyar gabatarwar fasahar ROADM, fasahar OTH, G.709 encapsulation da jirgin sama mai sarrafawa, yana magance matsalar hanyoyin sadarwar WDM na al'ada ba tare da damar tsara tsarin sabis na tsawon tsayi / raƙuman raƙuman ruwa ba., Rashin ƙarfin sadarwar, raunin kariya da sauran batutuwa.Layin lantarki yana aiwatar da tsarawa dangane da ƙananan raƙuman ruwa (kamar GE, 2.5G, 10G, 40G, 100G barbashi), kuma tsarin tsarin ƙirar ƙirar yana dogara ne akan 10G, 40G ko 100G raƙuman ruwa, tare da babban amfani da bandwidth;yana da ɗimbin bytes sama da ƙasa, kuma OAM Ayyukansa na /P ya fi ƙarfin WDM.
Bugu da ƙari, OTN da DWDM za a iya amfani da su a cikin na kowa a kan Layer na gani, bambancin shi ne cewa OTN yana da ƙananan igiyoyi na lantarki.Don haka, ana ƙara wasu na'urorin DWDM akan hanyar sadarwar data kasance tare da ƙananan firam ɗin haɗin giciye na lantarki kuma an haɓaka su zuwa OTN.
3 DWDM da OTN kwatanta hanyar sadarwa
Haɗaɗɗen sadarwar OTN da DWDM za su rasa fa'idodin OTN (tsarin firam ɗin ya bambanta da WDM na gargajiya, kuma haɗin zai sami tasiri).
Tun da OTN na gani giciye-haɗin da aka yafi aiwatar da ROADM module ( lodi da WSS canji), la'akari da babban farashin ROADM, OM/OD da OADM da ake amfani da su samar da zobe cibiyar sadarwa da sarkar cibiyar sadarwa a OTN sadarwar.
Don cibiyoyin sadarwar da aka ɗaure (kamar layin gangar jikin mai nisa), fa'idodin OTN ba lallai ba ne ya bayyana su gabaɗaya saboda ƙayyadaddun sabis na tsaka-tsaki da hanyoyin kariya, amma har yanzu akwai fa'idodi a wasu fannoni (daidaitaccen tashar tashoshi yana haifar da ƙarancin farashi fiye da yadda ake buƙata). WDM na al'ada) , cibiyar sadarwar gangar jikin na yanzu galibi tana amfani da DWDM da OTN don sadarwar da aka fi so.
Don cibiyar sadarwar gida, tun da ana buƙatar haɗin sabis akai-akai, ana canza tsarin cibiyar sadarwa akai-akai kuma ana tsara shi, kuma hanyar kariya tana buƙatar canza ta cikin sassauƙa, WDM na gargajiya dole ne ya kasa yin hakan.Fa'idodin amfani da hanyar sadarwar OTN a bayyane suke.
OTN yana ba da ikon sarrafa kowane tsayin raƙuman ruwa akan kowane fiber, kuma OTN zai iya dacewa da haɓaka cibiyar sadarwa ta gaba.
4 Kwatanta DWDM da OTN Bearer Services
Bukatar crossover na lantarki ta OTN ta fito ne daga fitowar adadin 10G mai igiyar ruwa guda ɗaya.Lokacin da tashar ta kai 10G, OTU na iya ɗaukar 4*2.5G ko 8 zuwa 9 GE;DWDM tana ɗaukar hanyar batu-zuwa- aya.Idan buƙatar sabis ɗin ƙanƙanta ne, saka hannun jari na OTU yana bayyana asara.Don wannan, ya zama dole don gabatar da aikin haɗin giciye mai kama da SDH akan DWDM, don haɓaka aikin haɗin haɗin lantarki na OTN.
OTN yana da ikon crossover na lantarki, wato, ƙarfin juzu'i na ƙasa da kowane tashoshi (kamar SDH).A lokaci guda, haɗin giciye na gani da haɗin giciye na lantarki suna da 'yanci daga juna.Idan akwai damar haɗin haɗin kai na gani amma babu haɗin giciye na lantarki, ko haɗin wutar lantarki ba tare da haɗin haɗin kai ba, ana iya kiran shi OTN.
Saboda bambance-bambance a cikin tsarin ginin cibiyar sadarwa (farashi, barbashi sabis da jagorar gudana), ana amfani da hanyar ketare ta lantarki galibi a cikin kasar Sin, kuma ana amfani da hanyar crossover mafi yawa a kasashen waje.
5 Kammalawa
Ta hanyar bincike da kwatancen da ke sama, ana iya ganin cewa OTN da DWDM sun bambanta sosai ta fuskar fasaha da aikace-aikace.Daga hangen nesa na iyawar haɗin kai, ƙimar sabis da sassaucin hanyar sadarwa, OTN yana da ƙarfi sosai kuma zai iya fi dacewa da buƙatun haɗin giciye na gaba.
Saboda nuna gaskiya na watsa sabis na tsarin OTN, ƙarfin gyaran kuskure mai ƙarfi, ikon daidaitawa na gani / lantarki Layer iya tsarawa, iyawar kulawar kulawa da scalability na ƙarfin kayan aiki (80 * 100G kayan aiki yanzu ana kasuwanci), cibiyoyin sadarwa daban-daban Gabatarwar kayan aikin OTN yana da zama makawa.
Lokacin aikawa: Oktoba-25-2022