DWDM ndi OTN ndi machitidwe awiri aukadaulo omwe amapangidwa ndi ukadaulo wofalitsa magawano wavelength m'zaka zaposachedwa: DWDM ikhoza kuwonedwa ngati PDH yapitayi (kutumiza kwa point-to-point), ndipo ntchito zapaintaneti ndi zapaintaneti zimamalizidwa pa ODF kudzera mwa ma jumpers olimba;OTN ili ngati SDH (mitundu yosiyanasiyana ya Networking), yokhala ndi ntchito yolumikizirana (kaya ndikulumikizana kwamagetsi kwamagetsi kapena kuwala).
Ndi kufulumizitsa kosalekeza kwa ndondomeko ya ALL IP, pakalipano, mosasamala kanthu za msana wa dziko, msana wa chigawo kapena dongosolo la WDM lapafupi, OTN ndiyo yaikulu posankha zipangizo poyambira kumanga maukonde.Zipangizo za OTN zasintha pang'onopang'ono zida za DWDM ndi zabwino zake zapadera (Zofanana ndi zida za SDH m'malo mwa zida za PDH).Monga ukadaulo watsopano komanso mawonekedwe atsopano, OTN yakhala gawo lalikulu pamsika wapano.Nkhaniyi isanthula ndikufanizira zida za DWDM, OTN ndiukadaulo.
1 Malingaliro oyambira a DWDM ndi OTN
Ndi kusintha kwa zofunikira zautumiki ndi granularity, m'pofunika kuchulukitsa mautumiki akuluakulu-granularity kudzera mu ulusi wa kuwala (ulusi umodzi kapena wawiri-fiber) ndikugawanitsa mu mafunde osiyanasiyana kuti atumize mtunda wautali.Ukadaulo wogawika wavelength division multiplexing umatuluka momwe nthawi zimafunira.
DWDM ndi wavelength division multiplexing (Wavelength Division Multiplexing), yomwe imachulukitsa zizindikiro za kuwala kosiyanasiyana mu ulusi womwewo wotumizira.Ukadaulo wa WDM ndi ukadaulo wokhwima kwambiri wamagawo wavelength kwazaka zopitilira khumi.Zitha kugawidwa m'magulu awiri: sparse wavelength division multiplexing (CWDM), yokhala ndi nthawi yayikulu ya wavelength (20nm);dense wavelength division multiplexing (DWDM), yokhala ndi nthawi yaying'ono yotalikirapo (yochepera kapena yofanana ndi 0.8nm).Chifukwa cha mtunda waufupi wotumizira wa CWDM, zida zambiri za DWDM zimayikidwa mumayendedwe omwe alipo omwe amagwira ntchito zosiyanasiyana.
Dongosolo lotseguka la DWDM lili ndi magawo otsatirawa: OTM imamaliza kutsitsa ndikutsitsa kwa optical line terminal station, OA imamaliza kukonza mawonekedwe amtundu wamtundu wa multiplexed kwa optical line amplifying station, ndipo OTU imamaliza zosavomerezeka. kuwala kwa chizindikiro cha wavelength kukumana ndi G .694.1 (2) kutembenuka kwa mawonekedwe a mawonekedwe a kuwala kwa chizindikiro cha wavelength, OMU/ODU: imamaliza multiplexing/demultiplexing ya G.694.1 (2) kuwala kwa siginecha yokhazikika, OBA ( amplifier mphamvu) mphamvu ya chizindikiro chophatikizika cha optical pakuwonjezeka, potero kukulitsa mphamvu ya kuwala kwa mawonekedwe amtundu uliwonse, ndipo OPA (pre-amplification) imapangitsa kuti munthu azimva bwino pamtundu uliwonse wa wavelength powonjezera mphamvu ya kuwala kwa chizindikiro chowonjezera chowonjezera.
OTN ndi Optical Transport Network (Optical Transport Network), yomwe imadziwikanso kuti OTH (Optical Transport Hierarchy) ku ITU-T.Idapangidwa pamaziko a kugawanika kwachikhalidwe chavelength ndikuphatikiza zabwino za DWDM ndi SDH.Imaphatikiza ubwino wa kuwala kwa kuwala ndi magetsi, imapereka mphamvu yaikulu yotumizira, kulumikiza kowonekera kumapeto kwa mafunde / sub-wavelength ndi chitetezo cha carrier-level, ndipo ndi luso lapamwamba kwambiri lotumizira mautumiki akuluakulu a tinthu zazikulu.M'zaka zisanu zapitazi, ogwira ntchito atumiza zida za OTN pamlingo waukulu m'malo osiyanasiyana otumizira mauthenga.
2 Kuyerekeza kwaukadaulo wa DWDM ndi OTN
Ngakhale kuti dongosolo la DWDM limathandizira kwambiri kufalitsa kwa ma fiber optical ndikuthandizira kufalitsa mautumiki akuluakulu a granularity, chifukwa cha kuchepa kwa teknoloji yogawanitsa mafunde, kutalika kwa mafunde kumapangidwira mu mawonekedwe a point-to-point ndipo sangathe kusinthidwa mwamphamvu.Mlingo wogwiritsa ntchito gwero siwokwera, ndipo kusinthasintha kwa kusintha kwautumiki sikukwanira.Mayendedwe a bizinesi asintha, ndipo ndizovuta kwambiri kusintha.Kukonzekera pakati pa mautumiki a DWDM makamaka kukhazikika pa ODF.Kasamalidwe ka maukonde amangoyang'anira ntchito ya optical layer (ma byte oyang'anira maukonde ndi ochepa komanso chidziwitso chowongolera maukonde ndi chosavuta), ndipo pali njira zingapo zothetsera mavuto komanso zovuta kukonza.
OTN imalandira cholowa cha DWDM chotengera mphamvu zazikulu ndipo ili ndi kuthekera kosinthika kolumikizana kwa optoelectronic ndi chitetezo.Kupyolera mu kuyambitsa teknoloji ya ROADM, teknoloji ya OTH, G.709 encapsulation and control ndege, imathetsa vuto la maukonde achikhalidwe a WDM popanda mphamvu zokonzekera utumiki wa wavelength / sub-wavelength., Kulephera kwa maukonde, kufooka kwa chitetezo ndi zina.Zosanjikiza zamagetsi zimagwiritsa ntchito ndandanda yotengera mafunde ang'onoang'ono (monga GE, 2.5G, 10G, 40G, 100G particles), ndipo mawonekedwe a mawonekedwe a kuwala amachokera ku 10G, 40G kapena 100G wavelengths, ndi kugwiritsidwa ntchito kwakukulu kwa bandwidth;ili ndi ma byte ochulukirapo, ndipo OAM yake Ntchito ya /P ndiyamphamvu kuposa WDM.
Kuonjezera apo, OTN ndi DWDM zingagwiritsidwe ntchito mofanana pamtundu wa kuwala, kusiyana kwake ndikuti OTN ili ndi gawo lamagetsi lamagetsi.Chifukwa chake, zida zina za DWDM pa netiweki zomwe zilipo zimawonjezedwa ndi mafelemu amagetsi olumikizirana ndikukweza kukhala OTN.
3 DWDM ndi OTN network kufananitsa
Kulumikizana kosakanikirana kwa OTN ndi DWDM kudzataya ubwino wa OTN (mapangidwe a chimango ndi osiyana ndi WDM yachikhalidwe, ndipo kugwirizana kudzakhala ndi zotsatira).
Popeza OTN optical cross-connect imayendetsedwa makamaka ndi ROADM module (yodzaza ndi WSS switch), poganizira za mtengo wapamwamba wa ROADM, OM / OD ndi OADM zimagwiritsidwa ntchito popanga ma ring network ndi chain network mu OTN networking.
Kwa maukonde omangidwa (monga mizere yotalikirapo), zabwino za OTN sizimawonekera kwathunthu chifukwa cha njira zapakatikati zokhazikika komanso njira zodzitetezera, komabe pali zabwino zina mwazinthu zina (kuchita bwino kwa njira kumabweretsa kutsika mtengo kuposa chikhalidwe WDM), netiweki yapano imagwiritsa ntchito DWDM ndi OTN pamanetiweki apamwamba.
Kwa maukonde amderalo, popeza mautumiki amafunika kulumikizidwa pafupipafupi, mawonekedwe a netiweki amasinthidwa pafupipafupi ndikukonzedwa, ndipo njira yodzitetezera iyenera kusinthidwa mosinthika, WDM yachikhalidwe iyenera kulephera kutero.Ubwino wogwiritsa ntchito ma netiweki a OTN umadziwonekera.
OTN imapereka luso lotha kuyang'anira kutalika kwa mafunde pamtundu uliwonse, ndipo OTN imatha kusinthiratu kukula kwa netiweki yamtsogolo.
4 Kuyerekeza kwa DWDM ndi OTN Bearer Services
Kufunika kwa crossover yamagetsi ya OTN kumabwera chifukwa cha kuwonekera kwa 10G yamtundu umodzi.Njira ikafika ku 10G, OTU yake imatha kunyamula 4 * 2.5G kapena 8 mpaka 9 GEs;DWDM imatengera njira yolunjika.Ngati kufunikira kwautumiki kuli kochepa, ndalama za OTU zimawoneka ngati zowononga.Kuti izi zitheke, ndikofunikira kuyambitsa ntchito yolumikizirana yofanana ndi SDH pa DWDM, kuti isinthe ntchito yolumikizira magetsi ya OTN.
OTN ili ndi mphamvu ya crossover yamagetsi, ndiye kuti, mphamvu yodutsa pang'ono pa njira (monga SDH).Panthawi imodzimodziyo, kugwirizanitsa kwa kuwala ndi magetsi kumagwirizana.Ngati pali mphamvu yolumikizira yolumikizana ndi magetsi koma palibe cholumikizira chamagetsi, kapena cholumikizira chamagetsi popanda cholumikizira cholumikizira, imatha kutchedwa OTN.
Chifukwa cha kusiyana kwa mitundu yomanga maukonde (mtengo, tinthu tating'onoting'ono ndi njira yolowera), njira yodutsa magetsi imagwiritsidwa ntchito kwambiri ku China, ndipo njira yolumikizira kuwala imagwiritsidwa ntchito kwambiri kunja.
5 Mapeto
Kupyolera mu kusanthula pamwamba ndi kuyerekezera, zikhoza kuwoneka kuti OTN ndi DWDM ndizosiyana kwambiri ndi zamakono ndi ntchito.Kuchokera pamawonekedwe a mphamvu yolumikizirana, kuchuluka kwa ntchito komanso kusinthasintha kwa maukonde, OTN ndi yamphamvu kwambiri ndipo imatha kukwaniritsa zofunikira pakulumikizana kwapaintaneti kwamtsogolo.
Chifukwa cha kuwonekera kwa kutumiza kwa ntchito ya OTN, kuthekera kowongolera zolakwika, kusinthika kwa mawonekedwe amagetsi / magetsi osanjikiza, kuthekera kowongolera komanso scalability wa zida zamagetsi (zida 80 * 100G tsopano zagulitsidwa), maukonde osiyanasiyana opatsirana Kuyambitsidwa kwa zida za OTN kukhala osapeweka.
Nthawi yotumiza: Oct-25-2022