DWDM neOTN masisitimu maviri ehunyanzvi akagadzirwa netekinoroji yekuparadzanisa wavelength mumakore achangopfuura: DWDM inogona kutariswa sePDH yekare (point-to-point transmission), uye masevhisi epamhepo neekunze kwenyika anopedzwa paODF kuburikidza nema hard jumpers; OTN yakafanana neSDH (mhando dzakasiyana dzeNetworking), ine basa rekubatanidza (ingave iri kubatana kwe electrical layer kana optical layer).
Nekukurumidzisa kuri kuramba kuchiitwa kweALL IP, pari zvino, pasinei nemusimboti wenyika, musimboti wedunhu kana network yemuno yeWDM, OTN ndiyo inonyanya kushandiswa pakusarudza michina pakutanga kwekuvakwa kwenetwork. Midziyo yeOTN yakatsiva zvishoma nezvishoma michina yeDWDM nezvakanaka zvayo zvakasiyana (Zvakafanana nemidziyo yeSDH inotsiva michina yePDH). Se tekinoroji itsva uye chigadzirwa chitsva, OTN yave chinhu chinonyanya kutariswa muindasitiri iripo. Chinyorwa chino chichaongorora nekuenzanisa michina yeDWDM, OTN uye tekinoroji.
1 Pfungwa huru dzeDWDM neOTN
Nekuchinja kwezvinodiwa zvebasa uye granularity, zvakakosha kuwedzera mabasa e granularity yakakura kuburikidza ne optical fibers (single-fiber kana dual-fiber) wobva waapatsanura kuita ma wavelength akasiyana ekutumira kure. Tekinoroji ye multiplexing yekupatsanurwa kwe wavelength division inobuda zvichienderana nenguva.
DWDM imhando yewavelength division multiplexing (Wavelength Division Multiplexing), iyo inosanganisa masaini e optical ema wavelength akasiyana kuita fiber imwechete yekutumira. Tekinoroji yeWDM itekinoroji yekare yekuparadzanisa wavelength kwemakore anopfuura gumi. Inogona kukamurwa kuita zvinhu zviviri: sparse wavelength division multiplexing (CWDM), ine wavelength interval yakakura (20nm); dense wavelength division multiplexing (DWDM), ine wavelength interval diki (isingasviki kana yakaenzana ne0.8nm). Nekuda kwedaro diki rekutumira reCWDM, nhamba huru yemidziyo yeDWDM inoiswa muma network ekutumira aripo evashandisi vakasiyana-siyana.
Sisitimu yakavhurika yeDWDM ine zvikamu zvinotevera: OTM inopedzisa kurodha nekuburitsa masevhisi echiteshi chemagetsi chemagetsi, OA inopedzisa kugadziriswa kwesimba remagetsi remagetsi remagetsi re multiplexed signal yechiteshi chemagetsi, uye OTU inopedzisa simba remagetsi remagetsi risingawanzo shandiswa kuti risangane nebasa reG .694.1(2) rekushandura wavelength signal light, OMU/ODU: inopedzisa multiplexing/demultiplexing yeG.694.1(2) fixed wavelength signal light, OBA (power amplifier) inovandudza simba rechiratidzo chemagetsi chakabatanidzwa nekuwedzera , nokudaro ichiwedzera simba remagetsi remagetsi rewavelength yega yega, uye OPA (pre-amplification) inovandudza kugamuchira kwewavelength yega yega nekuwedzera simba remagetsi rechiratidzo chemagetsi chinopinza.
OTN iOptical Transport Network (Optical Transport Network), inozivikanwawo seOTH (Optical Transport Hierarchy) muITU-T. Yakagadzirwa zvichibva pakupatsanurwa kwewavelength yechinyakare uye yakabatanidza zvakanakira DWDM neSDH. Inobatanidza zvakanakira optical domain uye electrical domain processing, inopa simba guru rekutumira, kubatana kwakajeka kubva pamagumo kusvika kumagumo kwewavelength/sub-wavelength uye dziviriro yecarrier-level, uye tekinoroji yakanaka kwazvo yekutumira masevhisi ebroadband large-particle. Mumakore mashanu apfuura, vashandi vakaisa michina yeOTN pamwero mukuru muma network akasiyana-siyana ekutumira.
2 Kuenzanisa kwehunhu hwehunyanzvi hweDWDM neOTN
Kunyangwe sisitimu yeDWDM ichivandudza zvakanyanya mashandiro ekufambisa kwemafiber e optical uye ichitsigira kufambiswa kwemasevhisi e-large-granularity, nekuda kwekuganhurirwa kwetekinoroji yekuparadzanisa wavelength, ma wavelength akagadzirwa nenzira ye point-to-point uye haagone kugadziriswa nenzira inochinja. Mwero wekushandiswa kwezviwanikwa hauna kukwira, uye kuchinjika kwekugadzirisa sevhisi hakuna kukwana. Kufamba kwebhizinesi kwachinja, uye zvakaoma kwazvo kugadzirisa. Kurongwa kwehurongwa pakati pemasevhisi eDWDM kunonyanya kurongwa kwemuviri paODF. Kutarisirwa kwenetwork kunongotarisa mashandiro e optical layer (network management bytes shoma uye ruzivo rwekutarisira network rwuri nyore), uye kune nzira shoma dzekugadzirisa matambudziko uye kuoma kwakanyanya kwekugadzirisa.
OTN inogara nhaka basa rekutumira data reDWDM rine simba guru uye ine kugona kuchinjika kwe optoelectronic joint scheduling uye kudzivirira. Kuburikidza nekuunzwa kwetekinoroji yeROADM, tekinoroji yeOTH, G.709 encapsulation uye control plane, inogadzirisa dambudziko rema network echinyakare eWDM asina kugona kuronga data re wavelength/sub-wavelength. , Kugona kushoma kwe networking, kugona kushoma kwekudzivirira nezvimwe zvinhu. Iyo electrical layer inoshandisa kuronga data zvichibva pane sub-wavelengths (senge GE, 2.5G, 10G, 40G, 100G particles), uye optical layer scheduling inonyanya kubva pa 10G, 40G kana 100G wavelengths, nekushandiswa kwakanyanya kwebandwidth; ine overhead bytes dzakawanda, uye OAM yayo The /P function yakasimba kupfuura WDM.
Pamusoro pezvo, OTN neDWDM zvinogona kushandiswa zvakafanana pa optical layer, musiyano ndewekuti OTN ine subframe ye electrical layer. Saka, mimwe midziyo yeDWDM iri pa network iripo inowedzerwa ne electronic cross-connect sub-frames uye inovandudzwa kuita OTN.
3 Kuenzanisa DWDM neOTN networking
Kubatana kweOTN neDWDM kucharasikirwa nemabhenefiti eOTN (chimiro chefuremu chakasiyana neWDM yechinyakare, uye kubatana kwacho kuchakanganisa).
Sezvo OTN optical cross-connect ichinyanya kushandiswa neROADM module (yakazadzwa neWSS switch), tichifunga nezvemutengo wakakwira weROADM, OM/OD neOADM zvinoshandiswa kugadzira ring network nechain network muOTN networking.
Kune network dzakasungirirwa (dzakadai setambo dzema trunk dzinofamba kure), zvakanakira zveOTN hazviratidzike zvizere nekuda kwemasevhisi epakati akagadzika uye nzira dzekudzivirira, asi kuchine zvakanakira mune zvimwe zvinhu (kushanda zvakanaka kwechiteshi kunotungamira kumitengo yakaderera pane WDM yechinyakare), network ye trunk iripo inonyanya kushandisa DWDM neOTN kune network dzakaiswa pamusoro.
Kune network yemuno, sezvo masevhisi achifanira kubatanidzwa nguva nenguva, chimiro chenetwork chinogara chichichinjwa uye chakarongwa, uye nzira yekudzivirira inoda kuchinjwa nenzira inochinjika, WDM yechinyakare inofanira kunge isingakwanise kuita izvozvo. Zvakanakira kushandisa OTN networking zviri pachena.
OTN inopa kugona kudzora wavelength yega yega pafiber yega yega, uye OTN inogona kuchinjika zviri nani kukukura kwenetwork mune ramangwana.
4 Kuenzanisa DWDM neOTN Bearer Services
Kudiwa kweOTN electrical crossover kunobva pakubuda kwe single-wave 10G rate. Kana channel yasvika 10G, OTU yayo inogona kutakura 4 * 2.5G kana 8 kusvika 9 GEs; DWDM inoshandisa nzira ye point-to-point. Kana kudiwa kwebasa kuri kudiki, OTU investment inoita seisina basa. Kuti izvi zviitike, zvakakosha kuisa cross-connect function yakafanana neSDH paDWDM, kuitira kuti basa re electrical cross-connect reOTN ribudirire.
OTN ine kugona kwemagetsi kuchinjika, ndiko kuti, kugona kwepasi pedanho repasi pechiteshi (kufanana neSDH). Panguva imwe chete, kubatana kwemagetsi kuchinjika uye kubatana kwemagetsi hazvienderane. Kana paine kugona kwekubatanidza magetsi asi pasina kubatana kwemagetsi, kana kubatana kwemagetsi kusina kubatana kwemagetsi, inogona kunzi OTN.
Nekuda kwekusiyana kwemamodheru ekuvaka network (mutengo, sevhisi uye nzira yekuyerera), nzira yemagetsi yecrossover inonyanya kushandiswa muChina, uye nzira ye optical crossover inonyanya kushandiswa kunze kwenyika.
5 Mhedziso
Kuburikidza nekuongorora nekuenzanisa kuri pamusoro apa, zvinogona kuonekwa kuti OTN neDWDM zvakasiyana zvakanyanya maererano netekinoroji uye mashandisirwo. Kubva pamaonero ehukuru hwekubatanidza, huwandu hwesevhisi uye kuchinjika kwenetwork, OTN ine simba guru uye inogona kusangana zviri nani nezvinodiwa zvekubatanidza network mune ramangwana.
Nekuda kwekujeka kwekutumira kweOST system service, kugona kwakasimba kugadzirisa zvikanganiso, kugona kuchinjika kwe optical/electrical layer scheduling, kugona kugadzirisa magadzirirwo uye kugona kukura kwemidziyo (80 * 100G michina yava kutengeswa), ma network akasiyana-siyana ekutumira mashandisirwo Kuunzwa kwemidziyo yeOST kwave kusingadzivisiki.
Nguva yekutumira: Gumiguru-25-2022