Ndiyo network yekutumira data yechizvarwa chinotevera. Zvichitaurwa zviri nyore, inetwork yekufambisa data yechizvarwa chinotevera inobva pawavelength.
OTN inetwork yekufambisa yakavakirwa patekinoroji yewavelength division multiplexing iyo inoronga network pa optical layer, uye ndiyo network yekufambisa yechizvarwa chinotevera. OTNchizvarwa chitsva che "digital transmission system" uye "optical transmission system" inodzorwa nehurongwa hweITU-T hwakatevedzana hwakaita seG.872, G.709, uye G.798. Ichagadzirisa dambudziko rekusava nemasevhisi ewavelength/sub-wavelength muma network echinyakare eWDM. Matambudziko akadai sekusagona kuronga nguva zvakanaka, kusakwanisa kugarisana zvakanaka, uye kusakwanisa kudzivirira. OTN inogadzirisa matambudziko akati wandei emasystem echinyakare kuburikidza nemaprotocol akatevedzana.
OTN inosanganisira nzvimbo yemagetsi yechinyakare (digital transmission) uye nzvimbo ye optical (analog transmission), uye chiyero chakabatana chekutarisira nzvimbo dzemagetsi ne optical.
Chinangwa chikuru che Kugadziriswa kweOTNibhizinesi rehuwandu hwemafungu, iro rinosundidzira network yekufambisa kusvika padanho re network ye optical ine mafungu akawanda. Nekuda kwekusanganiswa kwezvakanaka zve optical domain uye electrical domain processing, OTN inogona kupa simba guru rekutumira, kubatana kwakajeka kubva pamagumo kusvika kumagumo kwe wavelength/sub-wavelength uye dziviriro ye carrier-class, uye ndiyo tekinoroji yakanakisisa yekutumira masevhisi e broadband large-particle.
mukana mukuru
Chinhu chikuru cheOTN ndechekuti inoenderana zvizere, inogona kuvakira pamabasa eSONET/SDH ekutonga aripo, haingope pachena chete maprotocol ekutaurirana aripo, asiwo inopa kugona kwekubatana kubva pamagumo kusvika kumagumo uye networking yeWDM, Inopa specification ye optical layer interconnection yeROADM, uye inowedzera kugona kwe sub-wavelength aggregation uye grooming. Kugona kwekubatanidza kubva pamagumo kusvika kumagumo uye networking kunonyanya kusimbiswa zvichibva paSDH, uye modhi ye optical layer inopihwa.
Pfungwa yeOTN inovhara optical layer ne electrical layer network, uye tekinoroji yayo inogara nhaka mabhenefiti maviri eSDH neWDM. Zvinhu zvikuru zvehunyanzvi ndeizvi:
1. Kuvharwa kwezviratidzo zvevatengi vakasiyana-siyana uye kutumirwa kwakajeka Chimiro chefuremu yeOTN chakavakirwa paITU-TG.709 chinogona kutsigira kuumbwa kwemepu uye kutumirwa kwakajeka kwezviratidzo zvevatengi vakasiyana-siyana, zvakaita seSDH, ATM, Ethernet, nezvimwewo. Kuvharwa kwakajairika uye kutumirwa kwakajeka kunogona kuwanikwa kune SDH neATM, asi rutsigiro rweEthernet pamitengo yakasiyana rwakasiyana. ITU-TG.sup43 inopa mazano ekuwedzera e10GE services kuti iwane madhigirii akasiyana ekutumira kwakajeka, nepo kune GE, 40GE, 100GE Ethernet, private network services Fibre Channel (FC) uye access network services Gigabit Passive Optical Network (GPON) ), nezvimwewo, nzira yakajairwa yekuisa mamepu kufuremu yeOTN iri kukurukurwa parizvino.
2. Kuwedzeredza bandwidth, kuchinjika uye kurongeka kwezvikamu zvikuru. Zvikamu zvebandwidth zve electrical layer zvinotsanangurwa neOTN iyuniti dzedata dze optical channel (O-DUk, k=0,1,2,3), dzinoti ODUO(GE,1000M/S)ODU1 (2.5Gb/s), ODU2 (10Gb/s) uye ODU3 (40Gb/s), bandwidth granularity ye optical layer ndeye wavelength, zvichienzaniswa ne scheduling granularity yeSDH VC-12/VC-4, OTN multiplexing, crossover uye Zvikamu zvakagadziriswa zviri pachena kuti zvakakura kwazvo, izvo zvinogona kuvandudza zvakanyanya kuchinjika uye kushanda zvakanaka kwe high-bandwidth data customer services.
3. Hunhu hwakasimba hwekutarisira pamusoro pemagetsi nekuchengetedza OTN inopa kugona kwekutarisira pamusoro pemagetsi kwakafanana neSDH, uye chimiro chefuremu yeOTN cheOTN Optical Channel (OCh) layer chinowedzera zvakanyanya kugona kwekutarisa kwedhijitari kweiyi layer. Pamusoro pezvo, OTN inopawo basa rekutarisa serial connection re6-layer, izvo zvinoita kuti zvikwanisike kuita end-to-end uye multiple segment performance monitoring panguva imwe chete panguva yeOTN networking. Inopa nzira dzakakodzera dzekutarisira cross-operator transmission.
4. Kugona kwakawedzerwa kwenetworking nekudzivirira. Kuburikidza nekuunzwa kwechimiro chefuremu cheOTN, ODUk crossover uye multi-dimensional reconfigurable optical add-drop multiplexer (ROADM), kugona kwenetworking kwenetwork yekufambisa optical kwakawedzerwa zvikuru, uye bandwidth yekuronga yeSDHVC-based 12/VC-4 uye mamiriro ezvinhu eWDM point-to-point inopa bandwidth yekutumira yakakura. Kushandiswa kwetekinoroji yekugadzirisa kukanganisa (FEC) kunowedzera zvakanyanya daro rekutumira optical layer. Pamusoro pezvo, OTN ichapa mabasa ekudzivirira masevhisi anochinjika zvichienderana ne electrical layer uye optical layer, senge ODUk layer-based photonic network connection protection (SNCP) uye shared ring network protection, optical layer-based optical channel kana multiplex section protection, nezvimwewo. Asi tekinoroji yeshared ring haisati yagadziriswa.
Nguva yekutumira: Mbudzi-01-2022