DWDM neOTN maitiro maviri eunyanzvi akagadzirwa newavelength division transmission technology mumakore achangopfuura: DWDM inogona kuonekwa sePDH yapfuura (point-to-point transmission), uye mabasa epaIndaneti uye e-offline anopedzwa paODF kuburikidza nekusvetuka kwakaoma;OTN yakafanana neSDH (marudzi akasiyana-siyana eNetworking), ane basa rekuyambuka-kubatanidzwa (kungave kuri kubatanidzwa kwemagetsi emagetsi kana optical layer).
Nekuenderera mberi kwekukurumidza kwemaitiro eSE IP, parizvino, zvisinei nemusana wenyika, musana wepurovhinzi kana network network WDM system, OTN ndiyo inonyanya kukosha pakusarudza michina mudanho rekutanga rekuvaka network.Midziyo yeOTN yakatsiva zvishoma nezvishoma michina yeDWDM nemabhenefiti ayo akasiyana (Zvakafanana nemidziyo yeSDH inotsiva PDH michina).Se tekinoroji nyowani uye fomu nyowani yechigadzirwa, OTN yave iyo yekutarisa indasitiri yazvino.Ichi chinyorwa chichaongorora uye kuenzanisa DWDM, OTN zvishandiso uye tekinoroji.
1 Mafungiro ekutanga eDWDM neOTN
Neshanduko yezvinodiwa zvesevhisi uye granularity, zvinodikanwa kuti uwedzere masevhisi makuru-granularity kuburikidza neoptical fibers (imwe-fiber kana mbiri-fiber) uye wozoipatsanura muakasiyana wavelengths yekutapurirana kure-kure.Iyo wavelength division multiplexing tekinoroji inobuda sezvinodiwa nenguva.
DWDM is wavelength division multiplexing (Wavelength Division Multiplexing), iyo inowandisa zviratidzo zvemaziso emhando dzakasiyana-siyana mu fiber imwechete yekutumira.WDM tekinoroji ndeye yakakura kwazvo yechinyakare wavelength division tekinoroji kweanopfuura makore gumi.Inogona kugoverwa muzvikamu zviviri: sparse wavelength division multiplexing (CWDM), ine nguva yakakura yewavelength (20nm);dense wavelength division multiplexing (DWDM), ine diki yavelength interval (isingasviki kana yakaenzana ne0.8nm).Nekuda kwechinhambwe chipfupi chekufambisa kweCWDM, nhamba huru yemidziyo yeDWDM inoiswa mumatanho ekutapurirana aripo evashandisi vakasiyana.
Iyo yakavhurika DWDM sisitimu ine zvikamu zvinotevera: OTM inopedzisa sevhisi kurodha uye kuburitsa kune yekuona mutsara terminal station, OA inopedzisa yakachena optical relay amplification processing yemultiplexed chiratidzo cheiyo optical line amplifying station, uye OTU inopedzisa iyo isiri-standard. Chiedza chechiratidzo chewavelength kusangana neG .694.1 (2) wavelength shanduko yekushanda kweyero yewavelength chiratidzo chechiedza, OMU/ODU: inopedzisa multiplexing/demultiplexing yeG.694.1 (2) fixed wavelength signal light, OBA (simba amplifier) inovandudza simba reiyo yakasanganiswa optical chiratidzo nekuwedzera, nekudaro ichiwedzera kubuda kweiyo optical simba rewavelength yega yega, uye OPA (pre-amplification) inovandudza kugashira kwekunzwa kweyega yega wavelength nekuwedzera simba rekuona rekuisa multiplexed chiratidzo.
OTN iOptical Transport Network (Optical Transport Network), inozivikanwawo seOTH (Optical Transport Hierarchy) muITU-T.Yakagadzirwa pahwaro hwechinyakare wavelength division uye yakabatanidza zvakanakira DWDM uye SDH.Inobatanidza zvakanakira optical domain uye magetsi domain processing, inopa hukuru hwekutapurirana simba, kujeka kwakazara kwekupedzisira-kusvika-kumagumo wavelength/sub-wavelength yekubatanidza uye inotakura-level kuchengetedza, uye inyanzvi yakanakisa yekufambisa Broadband hombe-particle services.Mumakore mashanu apfuura, vashandisi vakaisa midziyo yeOTN pamwero mukuru mumatanho akasiyana ekutumira.
2 Kuenzanisa kwehunyanzvi hunhu hweDWDM neOTN
Kunyange zvazvo DWDM system inovandudza zvikuru kushandiswa kwekufambisa kwemafiber optical uye inotsigira kutumirwa kwemabasa makuru-granularity, nekuda kwekugadziriswa kwewavelength division teknolojia, wavelengths inogadziriswa mune imwe nzira-ku-point uye haigoni kugadziriswa nesimba.Chiyero chekushandisa zviwanikwa hachina kukwirira, uye kuchinjika kwekugadzirisa sevhisi hakuna kukwana.Kuyerera kwebhizinesi kwakachinja, uye kwakaoma kwazvo kugadzirisa.Kuronga pakati peDWDM masevhisi ndiko kunyanya kuronga kwemuviri paODF.Iyo network manejimendi inongotarisa mashandiro eiyo optical layer (iyo network manejimendi ma byte mashoma uye network manejimendi ruzivo iri nyore), uye kune mashoma nzira dzekugadzirisa matambudziko uye yakanyanya kuoma kugadzirisa.
OTN inogara nhaka yehukuru-hukuru hwekutapurirana basa reDWDM uye ine inochinjika optoelectronic majoini kuronga uye kugona kudzivirira.Kuburikidza nekuiswa kweROADM tekinoroji, OTH tekinoroji, G.709 encapsulation uye ndege yekudzora, inogadzirisa dambudziko retsika dzeWDM network pasina wavelength / sub-wavelength sevhisi kuronga kugona., Weak networking kugona, kushaya simba rekudzivirira uye zvimwe zvinhu.Mutambo wemagetsi unoshandisa kuronga zvichienderana ne-sub-wavelengths (yakadai seGE, 2.5G, 10G, 40G, 100G particles), uye optical layer scheduling inonyanya kuenderana ne10G, 40G kana 100G wavelengths, ine kushandiswa kwepamusoro bandwidth;ine akawanda overhead bytes, uye yayo OAM Iyo /P basa rakasimba kupfuura WDM.
Mukuwedzera, OTN neDWDM inogona kushandiswa zvakafanana pane optical layer, mutsauko ndewekuti OTN ine yemagetsi layer subframe.Naizvozvo, mamwe madhizaini eDWDM pane network iripo anowedzerwa neelectronic cross-connect sub-frames uye akakwidziridzwa kuOTN.
3 DWDM uye OTN networking kuenzanisa
Iyo yakasanganiswa networking yeOTN neDWDM icharasikirwa nemabhenefiti eOTN (iyo furemu chimiro chakasiyana neyechinyakare WDM, uye kubatana kuchave nemhedzisiro).
Sezvo OTN optical cross-connect inonyanya kushandiswa neROADM module (yakatakurwa neWSS switch), tichifunga nezvemutengo wepamusoro weROADM, OM / OD uye OADM inoshandiswa kuumba ring ring network uye chain network muOTN networking.
Kune network dzakasungwa (senge mitsara yehurefu-refu), zvakanakira zveOTN hazvifanirwe kuratidzwa zvizere nekuda kweiyo yakatemerwa yepakati masevhisi uye nzira dzekudzivirira, asi kuchine mabhenefiti mune zvimwe zvinhu (yakakwira chiteshi kushanda kunoita kuti mutengo wakaderera pane. yechinyakare WDM), iyo yazvino trunk network inonyanya kushandisa DWDM neOTN kune superimposed networking.
Kune network yenzvimbo, sezvo masevhisi achifanirwa kubatanidzwa kazhinji, iyo network chimiro chinowanzo chinjwa uye kurongwa, uye nzira yekudzivirira inoda kuchinjwa nyore, iyo yechinyakare WDM inofanirwa kusakwanisa kuita kudaro.Zvakanakira kushandisa OTN networking zvinooneka.
OTN inopa kugona kubata yega wavelength pane yega fiber, uye OTN inogona kuchinjika zviri nani kune ramangwana retiweki kusimudzira.
4 Kuenzanisa kweDWDM uye OTN Bearer Services
Iko kudiwa kweOTN yemagetsi crossover kunobva mukubuda kweyero-wave 10G chiyero.Kana chiteshi chasvika 10G, OTU yayo inogona kutakura 4 * 2.5G kana 8 kusvika 9 GEs;DWDM inotora nzira yekunongedza.Kana iyo sevhisi inodiwa idiki, OTU investimendi inoita seinopambadza.Kuti izvi zviitike, zvinodikanwa kuunza basa rekubatanidza rakafanana neSDH paDWDM, kuitira kushandura basa remagetsi rekubatanidza reOTN.
OTN ine magetsi crossover simba, kureva, sub-rate crossover kugona pachiteshi (zvakanyanya seSDH).Panguva imwecheteyo, optical cross-connection uye magetsi cross-connection zvakasununguka kune mumwe nemumwe.Kana paine optical cross-connection inokwanisa asi pasina magetsi muchinjika-kubatanidza, kana yemagetsi muchinjiko-kubatanidza pasina optical cross-connection, inogona kunzi OTN.
Nekuda kwekusiyana kwemamodhi ekuvaka network (mutengo, sevhisi chidimbu uye mafambiro ekuyerera), yemagetsi crossover nzira inonyanya kushandiswa muChina, uye optical crossover nzira inonyanya kushandiswa kunze kwenyika.
5 Mhedziso
Kuburikidza nekuongorora kuri pamusoro uye kuenzanisa, zvinogona kuonekwa kuti OTN neDWDM zvakasiyana zvakanyanya maererano nekombiyuta uye kushandiswa.Kubva pamaonero emuchinjika-yekubatanidza huwandu, sevhisi granularity uye kuchinjika kwetiweki, OTN ine simba kwazvo uye inogona kuzadzisa zvirinani zvinodiwa zveramangwana retiweki muchinjiko-wekubatanidza.
Nekuda kwekujeka kweOTN system service transmission, yakasimba kukanganisa kukanganisa kugona, flexible optical/electrical layer scheduling kugona, kuchengetedza manejimendi uye scalability yemidziyo yemagetsi (80 * 100G midziyo ikozvino inotengeswa), akasiyana siyana ekufambisa network Kuunzwa kweOTN michina ine. kuva asingadzivisiki.
Nguva yekutumira: Oct-25-2022