Ọ bụ netwọk mgbasa ozi azụ nke ọgbọ na-abịa.N'ikwu ya n'ụzọ dị mfe, ọ bụ netwọk ụgbọ njem na-esote ọgbọ dabere na ogologo.
OTN bụ netwọk njem na-adabere na teknụzụ multiplexing nkewa nkewa nke na-ahazi netwọk na oyi akwa anya, ma bụrụkwa netwọk ụgbọ njem nke ọgbọ na-abịa. OTNbụ ọgbọ ọhụrụ nke "usoro mgbasa ozi dijitalụ" na "usoro mgbasa ozi anya" na-achịkwa usoro nke ITU-T dị ka G.872, G.709, na G.798.Ọ ga-edozi nsogbu nke enweghị ọrụ wavelength/ sub-wavelength na netwọk WDM ọdịnala.Nsogbu ndị dị ka ike nhazi oge adịghị mma, ike ịkparịta ụka n'Ịntanet adịghị ike, na ike nchebe adịghị ike.OTN na-edozi usoro nke ọtụtụ nsogbu nke usoro ọdịnala site na usoro usoro iwu.
OTN na-agbasa ngalaba eletriki ọdịnala (nfefe dijitalụ) na ngalaba anya (nfefe analọgụ), ma bụrụ ụkpụrụ ejikọtara ọnụ maka ijikwa ngalaba eletriki na ngwa anya.
Isi ihe nke Nhazi OTNbụ azụmahịa dị larịị nke ogologo ebili mmiri, nke na-akpali netwọk ụgbọ njem na ọkwa nke ezigbo netwọkụ anya multi-wavelength.N'ihi nchikota nke uru nke ngwa anya ngalaba na eletriki ngalaba nhazi, OTN nwere ike na-enye nnukwu nnyefe ikike, kpamkpam transperent njedebe njedebe wavelength / sub-wavelength njikọ na ụgbọelu-klas nchebe, na bụ ezigbo nkà na ụzụ maka ibufe brọdband nnukwu. -ọrụ urughuru.
isi uru
Isi uru nke OTN bụ na ọ na-adaba azụ azụ kpamkpam, ọ nwere ike wulite na ọrụ nchịkwa SONET/SDH dị ugbu a, ọ bụghị nanị na-enye nghọta zuru oke nke usoro nkwurịta okwu dị adị, kamakwa na-enye njikọ njedebe na njedebe na ike netwọk maka WDM. , Ọ na-enye nkọwapụta njikọ njikọ oyi akwa anya maka ROADM, ma na-agbakwunye mkpokọta obere ogologo na ike ijikwa ike.Njikọ njedebe na njedebe na ike ịkparịta ụka n'Ịntanet na-adabere na SDH, na-enye ihe nlereanya nke oyi akwa anya.
Echiche OTN na-ekpuchi oyi akwa anya na netwọk eletrik eletrik, na nkà na ụzụ ya na-eketa uru abụọ nke SDH na WDM.Isi njirimara teknụzụ bụ ndị a:
1. Dị iche iche ahịa mgbaàmà encapsulation na transperent nnyefe The OTN etiti Ọdịdị dabere na ITU-TG.709 nwere ike na-akwado nkewa na transperent nnyefe nke dị iche iche ahịa n'ókè, dị ka SDH, ATM, Ethernet, wdg Standard encapsulation na transperent nnyefe nwere ike nweta. maka SDH na ATM, mana nkwado maka Ethernet na ọnụego dị iche iche dị iche.ITU-TG.sup43 na-enye ndụmọdụ mgbakwunye maka ọrụ 10GE iji nweta ogo dị iche iche nke nnyefe transperent, ebe maka GE, 40GE, 100GE Ethernet, ọrụ netwọk nkeonwe Fiber Channel (FC) na ịnweta ọrụ netwọk Gigabit Passive Optical Network (GPON) ), wdg. ., A na-enwe mkparịta ụka ugbu a usoro nhazi nkewa nke OTN.
2. Bandwit multiplexing, crossover na nhazi nke nnukwu ihe ndị na-emepụta ihe ntanetị eletriki oyi akwa nke OTN kọwara bụ nkeji data ọwa anya (O-DUk, k=0,1,2,3), ya bụ ODUO (GE,1000M/S) ODU1 (2.5Gb / s), ODU2 (10Gb / s) na ODU3 (40Gb / s), bandwit granularity nke ngwa anya oyi akwa bụ wavelength, ma e jiri ya tụnyere nhazi oge granularity nke SDH VC-12 / VC-4, OTN multiplexing, crossover. na The ahazi ahụ bụ doro anya ukwuu ibu, nke nwere ike budata melite adaptability na nnyefe arụmọrụ nke elu-bandwidth data ahịa ọrụ.
3. Ike overhead na mmezi njikwa ike OTN na-enye ikike nchịkwa n'elu dịka SDH, na OTN frame Ọdịdị nke OTN Optical Channel (OCh) oyi akwa na-eme ka ikike nlekota dijitalụ nke oyi akwa a dịkwuo elu.Tụkwasị na nke ahụ, OTN na-enyekwa ọrụ nlekota oru nlekota serial connection (TCM) 6-layer nested, nke na-eme ka o kwe omume ịrụ ọrụ njedebe na njedebe na otutu akụkụ n'otu oge n'oge netwọk OTN.Na-enye ụzọ njikwa kwesịrị ekwesị maka nnyefe ndị na-arụ ọrụ.
4. Enwekwukwa ike ịkparịta ụka n'Ịntanet na nchebe site na ntinye nke usoro nhazi OTN, ODUk crossover na multi-dimensional reconfigurable optical add-drop multiplexer (ROADM), ike ịkparịta ụka n'Ịntanet nke netwọk njem anya na-emewanyewanye, na SDHVC dabeere 12. / VC-4 na-ahazi bandwit na ọnọdụ ọnọdụ WDM na-enye nnukwu bandwidth nnyefe ikike.Nkwenye nke teknụzụ mgbazi n'ihu (FEC) na-abawanye anya nke nnyefe oyi akwa anya.Na mgbakwunye, OTN ga-enye ọrụ nchebe ọrụ na-agbanwe agbanwe dabere na oyi akwa eletrik na oyi akwa anya, dị ka nchekwa njikọ netwọkụ photonic nke dabeere na ODUk (SNCP) na nchedo netwọkụ mgbanaka nkekọrịta, ọwa anya nke dabeere na oyi akwa ma ọ bụ nchebe ngalaba multiplex, wdg. Mana teknụzụ mgbanaka ekekọrịtabeghị ahazibeghị nke ọma.
Oge nzipu: Nov-01-2022