Ndiyo musana wekutapurirana network yechizvarwa chinotevera.Zvichitaurwa zviri nyore, iwavelength-yakavakirwa inotevera-chizvarwa chekutakura network.
OTN itiweki yekufambisa yakavakirwa pawavelength division multiplexing tekinoroji inoronga network pane optical layer, uye ndiyo musana wekutakura network yechizvarwa chinotevera. OTNichizvarwa chitsva che "digital transmission system" uye "optical transmission system" inotungamirirwa nehuwandu hweITU-T mazano akadai seG.872, G.709, uye G.798.Ichagadzirisa dambudziko rekushaya wavelength / sub-wavelength masevhisi mune echinyakare WDM network.Matambudziko akadai sekutadza kuronga kugona, kushomeka kwenetwork kugona, uye kushaya simba kwekudzivirira.OTN inogadzirisa nhevedzano yematambudziko akati wandei echinyakare masisitimu kuburikidza nenhevedzano yemaprotocol.
OTN inotambanudzira dura remagetsi rechinyakare (digital transmission) uye optical domain (analog transmission), uye chiyero chakabatana chekutonga magetsi nemeso madomasi.
Chinhu chakakosha che OTN kugadzirisaibhizinesi rewavelength-level, rinosundira network yekufambisa kusvika padanho rechokwadi remulti-wavelength optical network.Nekuda kwekubatanidzwa kwemabhenefiti eiyo optical domain uye yemagetsi domain processing, OTN inogona kupa yakakura kutapurirana simba, kujeka-kusvika-kumagumo wavelength/sub-wavelength yekubatanidza uye yekutakura-kirasi kuchengetedza, uye ndiyo yakakwana tekinoroji yekufambisa Broadband hombe. -particle services.
chikuru mukana
Kubatsira kukuru kweOTN ndeyekuti yakanyatso dzokera kumashure inoenderana, inogona kuvaka pane iripo SONET/SDH manejimendi mabasa, haingopi chete kujeka kwakazara kweiyo iripo yekutaurirana maprotocol, asiwo inopa kuguma-kusvika-kumagumo kubatana uye networking kugona kweWDM. , Inopa tsanangudzo ye optical layer interconnection ye ROADM, uye inowedzera sub-wavelength aggregation uye kugadzirisa maitiro.Iyo yekupedzisira-kusvika-kumagumo link uye networking kugona kunonyanya kusimbiswa pahwaro hweSDH, uye muenzaniso weiyo optical layer inopiwa.
Pfungwa yeOTN inovhara iyo optical layer uye yemagetsi layer network, uye tekinoroji yayo inogara nhaka mbiri mbiri dzeSDH neWDM.Iwo akakosha tekinoroji maficha ndeaya anotevera:
1. Various client sign encapsulation and transparent transmission The OTN frame structure inobva paITU-TG.709 inogona kutsigira mepu uye kutumira pachena kwezviratidzo zvakasiyana-siyana zvevatengi, zvakadai seSDH, ATM, Ethernet, nezvimwewo. yeSDH neATM, asi kutsigirwa kweEthernet pamitengo yakasiyana yakasiyana.ITU-TG.sup43 inopa kurudziro yekuwedzera kune masevhisi e10GE kuti awane madhigirii akasiyana ekutapurirana pachena, nepo GE, 40GE, 100GE Ethernet, yakavanzika network masevhisi Fiber Channel (FC) uye kuwana network masevhisi Gigabit Passive Optical Network (GPON) ), nezvimwewo. ., nzira yakamisikidzwa yemepu kune iyo OTN furemu iri kukurukurwa.
2. Bandwidth multiplexing, crossover uye kugadzirwa kwezvikamu zvakakura Zvikamu zvemagetsi zvemagetsi zvinotsanangurwa neOTN ndeye optical channel data units (O-DUk, k=0,1,2,3), kureva ODUO (GE,1000M/S) ODU1. (2.5Gb / s), ODU2 (10Gb / s) uye ODU3 (40Gb / s), bandwidth granularity ye optical layer is wavelength, kana ichienzaniswa nekugadzirisa granularity yeSDH VC-12 / VC-4, OTN multiplexing, crossover. uye Izvo zvakagadziriswa zvimedu zviri pachena zvakakura, izvo zvinogona kuvandudza zvakanyanya kuchinjika uye kutapurirana kwehunyanzvi hwepamusoro-bandwidth data vatengi masevhisi.
3. Simba repamusoro nepamusoro pekugadzirisa masimba ekugadzirisa OTN inopa hutungamiri hwepamusoro hwepamusoro hwakafanana neSDH, uye chimiro cheOTN chechimiro cheOTN Optical Channel (OCh) layer inovandudza zvikuru maitiro ekuongorora dhijitari yeiyi nhete.Pamusoro pezvo, OTN inopawo 6-layer nested serial connection monitoring (TCM) basa, izvo zvinoita kuti zvikwanise kuita kupera-kusvika-kumagumo uye akawanda segment performance monitoring panguva imwe chete panguva yeOTN networking.Inopa nzira dzakakodzera dzekutonga dzekuchinjisa-opareta kutapurirana.
4. Kuvandudzwa kwekubatanidza nekudzivirira masimba Kuburikidza nekuiswa kweOTN frame structure, ODUk crossover uye multi-dimensional reconfigurable optical add-drop multiplexer (ROADM), iyo networking simba ye optical transport network yakasimbiswa zvikuru, uye SDHVC-based 12. / VC-4 kuronga bandwidth uye chimiro cheWDM point-to-point inopa hukuru-hukuru hwekufambisa bandwidth.Kugamuchirwa kwekamberi kwekukanganisa (FEC) tekinoroji inowedzera zvakanyanya kureba kweiyo optical layer transmission.Pamusoro pezvo, OTN ichapa anochinjika masevhisi ekudzivirira mabasa anoenderana nemagetsi layer uye optical layer, senge ODUk layer-based photonic network network protection (SNCP) uye yakagovaniswa ring network kuchengetedza, optical layer-based optical chiteshi kana multiplex chikamu chekudzivirira, nezvimwe. Asi tekinoroji yekugovana mhete haisati yagadziriswa.
Nguva yekutumira: Nov-01-2022