ʻO ia ka pūnaewele hoʻoili iwi kuamoʻo o ka hanauna e hiki mai ana.ʻO ka hoʻopuka maʻalahi, he ʻupena kaʻa kaʻa o ka hanauna e hiki mai ana i ka nalu nalu.
ʻO ka OTN kahi ʻoihana halihali e pili ana i ka ʻenehana hoʻokaʻawale ʻana i ka hawewe lōʻihi e hoʻonohonoho ana i ka ʻoihana ma ka ʻaoʻao optical, a ʻo ia ka ʻupena kaʻa iwi kuamoʻo o ka hanauna e hiki mai ana. OTNhe hanauna hou ia o ka “digital transmission system” a me ka “optical transmission system” i hooponopono ia e kekahi mau papa kuhikuhi ITU-T e like me G.872, G.709, a me G.798.E hoʻonā i ka pilikia o ka hawewe ʻole / sub-wavelength lawelawe ma nā pūnaewele WDM kuʻuna.ʻO nā pilikia e like me ka hiki ʻole o ka hoʻonohonoho hoʻonohonoho ʻana, nāwaliwali ka hiki ʻana o ka pūnaewele, a me ka hiki ke pale nāwaliwali.Hoʻoponopono ʻo OTN i kekahi mau pilikia o nā ʻōnaehana kuʻuna ma o ke ʻano o nā protocols.
Hoʻopili ʻo OTN i ka domain uila kuʻuna (digital transmission) a me ka domain optical (analog transmission), a he maʻamau i hui pū ʻia no ka mālama ʻana i nā kikowaena uila a me ka optical.
ʻO ka mea kumu o ʻO ka hana OTNʻO ia ka ʻoihana pae hawewe, ka mea e hoʻoneʻe ai i ka ʻupena lawe kaʻa i ke kahua o kahi ʻoihana optical multi-length maoli.Ma muli o ka hui pū ʻana o nā mea maikaʻi o ka domain optical a me ka hoʻoili ʻana i ka uila uila, hiki i ka OTN ke hāʻawi i ka mana hoʻouna nui, ʻike maopopo loa i ka hopena o ka hawewe lōʻihi / sub-wavelength a me ka pale o ka mea lawe, a ʻo ia ka ʻenehana maikaʻi loa no ka hoʻouna ʻana i ka broadband nui. - nā lawelawe ʻāpana.
pono nui
ʻO ka pōmaikaʻi nui o OTN ʻo ia ka hoʻokō piha ʻana i hope, hiki iā ia ke kūkulu ma luna o nā hana hoʻokele SONET/SDH i kēia manawa, ʻaʻole ia e hāʻawi wale i ka ʻike piha o nā protocol kamaʻilio e kū nei, akā hāʻawi pū kekahi i ka hoʻohui ʻana i ka hopena a me ka hiki i ka pūnaewele no WDM , Hāʻawi ia i ka kikoʻī o ka hoʻopili ʻana o ka optical layer no ROADM, a hoʻohui i ka sub-wavelength aggregation a me ka hiki ke kāhiko.Hoʻokumu nuiʻia ka loulou hopena a me ka hiki ke hoʻonohonoho pūnaewele ma ke kumu o SDH, a ua hāʻawiʻia kahi hiʻohiʻona o ka'āpana optical.
Hoʻopili ka manaʻo OTN i ka ʻāpana optical a me ka network layer uila, a ua hoʻoili ʻia kāna ʻenehana i nā pono ʻelua o SDH a me WDM.ʻO nā hiʻohiʻona ʻenehana nui penei:
1. Hoʻopili ʻia nā hōʻailona hōʻailona like ʻole a me ka hoʻouna ʻana akaka ʻO ka hoʻolālā ʻana o ka OTN e pili ana i ka ITU-TG.709 hiki ke kākoʻo i ka palapala palapala a me ka hoʻouna ʻana i nā hōʻailona like ʻole, e like me SDH, ATM, Ethernet, etc. no SDH a me ATM, akā ʻokoʻa ke kākoʻo no Ethernet ma nā uku like ʻole.Hāʻawi ʻo ITU-TG.sup43 i nā ʻōlelo aʻoaʻo hou no nā lawelawe 10GE e hoʻokō i nā pae like ʻole o ka hoʻouna ʻia ʻana, ʻoiai no GE, 40GE, 100GE Ethernet, nā lawelawe pūnaewele pilikino Fiber Channel (FC) a me nā lawelawe ʻoihana pūnaewele ʻo Gigabit Passive Optical Network (GPON) ), etc. ., ke kamaʻilio nei ke ʻano palapala palapala maʻamau i ke kiʻi OTN.
2. ʻO ka hoʻonui ʻana i ka bandwidth, crossover a me ka hoʻonohonoho ʻana o nā ʻāpana nui ʻO nā ʻāpana uila o ka bandwidth i wehewehe ʻia e OTN he mau ʻikepili ʻikepili optical channel (O-DUk, k = 0,1,2,3), ʻo ia hoʻi ODUO (GE, 1000M / S) ODU1 (2.5Gb / s), ODU2 (10Gb / s) a me ODU3 (40Gb / s),ʻo ka bandwidth granularity o ka'āpana optical he hawewe lōʻihi, ke hoʻohālikelikeʻia me ka granularity scheduling o SDH VC-12 / VC-4, OTN multiplexing, crossover a ʻO nā ʻāpana i hoʻonohonoho ʻia ʻoi aku ka nui o ka nui, hiki ke hoʻomaikaʻi maikaʻi i ka hiki ke hoʻololi a me ka hoʻoili ʻana o nā lawelawe mea kūʻai aku ʻikepili kiʻekiʻe.
3. Hiki i nā mana hoʻokele mana a me ka mālama mālama OTN i nā mana hoʻokele o luna e like me SDH, a ʻo ke ʻano o ka hoʻolālā OTN o ka OTN Optical Channel (OCh) papa e hoʻonui nui i ka hiki ke nānā kikohoʻe o kēia papa.Eia kekahi, hāʻawi pū ʻo OTN i kahi hana 6-layer nested serial connection monitoring (TCM), kahi e hiki ai ke hana i ka nānā ʻana i ka hopena a i ka hopena a me nā ʻāpana he nui i ka manawa like ma ka pūnaewele OTN.Hāʻawi i nā ala hoʻokele kūpono no ka hoʻouna ʻana i ka cross-operator.
4. Hoʻonui i ka ʻoihana pūnaewele a me ka palekana Ma o ka hoʻokomo ʻana i ka hoʻolālā ʻana o ka OTN frame, ODUk crossover a me multi-dimensional reconfigurable optical add-drop multiplexer (ROADM), ua hoʻonui nui ʻia ka hiki ʻana o ka ʻoihana o ka transport optical, a me ka SDHVC-based 12 /VC-4 hoʻonohonoho bandwidth a me ke kūlana quo o WDM point-to-point e hāʻawi ana i ka bandwidth hoʻouna nui.ʻO ka hoʻohana ʻana i ka ʻenehana hoʻoponopono hewa mua (FEC) e hoʻonui nui i ka mamao o ka hoʻouna ʻana i ka papa optical.Eia kekahi, e hāʻawi ʻo OTN i nā hana palekana lawelawe maʻalahi e pili ana i ka papa uila a me ka layer optical, e like me ka ODUk layer-based photonic network connection protection (SNCP) a me ka pale ʻana i ke kani kani like, optical layer-based optical channel or multiplex section protection, etc. Akā ʻaʻole i hoʻopaʻa ʻia ka ʻenehana kani kani like.
Ka manawa hoʻouna: Nov-01-2022