Koinei te whatunga tuku matua o te whakatupuranga e whai ake nei. He māmā noa iho, he whatunga kawe i te whakatupuranga e whai ake nei e hangai ana ki ngā roangaru.
Ko te OTN he whatunga kawe i runga i te hangarau whakarea wehenga roangaru e whakarite ana i te whatunga i te paparanga whatu, ā, koia te whatunga kawe tuara o te whakatupuranga e whai ake nei. OTNhe whakatupuranga hou o te "pūnaha tuku mamati" me te "pūnaha tuku whatu" e whakahaeretia ana e te raupapa o ngā taunakitanga ITU-T pēnei i a G.872, G.709, me G.798. Ka whakatauhia e ia te raruraru o te kore ratonga roangaru/roa-iti i roto i ngā whatunga WDM tuku iho. Ngā raruraru pēnei i te kaha whakarite rawakore, te kaha whatunga ngoikore, me te kaha tiaki ngoikore. Ka whakatauhia e te OTN he raupapa o ngā raruraru maha o ngā pūnaha tuku iho mā roto i te raupapa o ngā kawa.
Ka hipokina e te OTN te rohe hiko tuku iho (te tuku mamati) me te rohe whatu (te tuku anaro), ā, he paerewa kotahi mō te whakahaere i ngā rohe hiko me te whatu.
Ko te kaupapa taketake o Tukatuka OTNhe pakihi taumata-ngaru, e pana ana i te whatunga kawe ki te taumata o tētahi whatunga whatu maha-roa-ngaru tūturu. Nā te whakakotahitanga o ngā painga o te tukatuka rohe whatu me te rohe hiko, ka taea e OTN te whakarato i te kaha tuku nui, te hononga roa-ngaru/roa-iti-ngaru tino mārama me te tiaki akomanga-kaikawe, ā, koinei te hangarau tino pai mō te tuku ratonga matūriki nui whānui.
painga matua
Ko te painga matua o te OTN he hototahi katoa ki ngā raraunga whakamuri, ka taea te hanga i runga i ngā mahi whakahaere SONET/SDH o nāianei, ehara i te mea ka whakarato noa i te māramatanga katoa o ngā kawa whakawhitiwhiti kōrero o nāianei, engari ka whakarato hoki i ngā āheinga hononga me te whatunga mai i te pito ki te pito mō te WDM, ka whakarato i te whakatakotoranga o te hononga paparanga whatu mō te ROADM, ā, ka tāpiri atu ki ngā āheinga whakakotahi me te whakapaipai i te roangaru iti. Ko ngā āheinga hononga me te whatunga mai i te pito ki te pito ka whakatūhia i runga i te SDH, ā, ka whakaratohia he tauira o te paparanga whatu.
Ko te ariā OTN e kapi ana i te paparanga whatu me te whatunga paparanga hiko, ā, e rua ngā painga o te SDH me te WDM i roto i tana hangarau. Ko ngā āhuatanga hangarau matua koia ēnei:
1. Ngā momo tākai tohu kiritaki me te tuku mārama Ka taea e te hanganga anga OTN i runga i te ITU-TG.709 te tautoko i te mahere me te tuku mārama o ngā momo tohu kiritaki, pērā i te SDH, ATM, Ethernet, me ētahi atu. Ka taea te whakatutuki i te tākai paerewa me te tuku mārama mō te SDH me te ATM, engari he rerekē te tautoko mō te Ethernet i ngā tere rerekē. Ka whakaratohia e ITU-TG.sup43 ngā taunakitanga tāpiri mō ngā ratonga 10GE hei whakatutuki i ngā taumata tuku mārama rerekē, engari mō te GE, 40GE, 100GE Ethernet, ngā ratonga whatunga tūmataiti Fibre Channel (FC) me ngā ratonga whatunga urunga Gigabit Passive Optical Network (GPON)), me ētahi atu, kei te kōrerohia te tikanga mahere paerewa ki te anga OTN.
2. Te whakarea whānui o te ara iahiko, te whakawhiti me te whirihoranga o ngā matūriki nunui Ko ngā matūriki whānui o te paparanga hiko i tautuhia e te OTN ko ngā wae raraunga hongere whatu (O-DUk, k=0,1,2,3), arā, ko te ODUO(GE,1000M/S)ODU1 (2.5Gb/s), ODU2 (10Gb/s) me te ODU3 (40Gb/s), ko te matotoru o te ara iahiko o te paparanga whatu he roangaru, ki te whakataurite ki te matotoru o te whakaritenga o te SDH VC-12/VC-4, te whakarea OTN, te whakawhiti me te. He nui ake ngā matūriki whirihora, ka taea te whakapai ake i te urutau me te whai huatanga tuku o ngā ratonga kiritaki raraunga whānui-teitei.
3. Ngā āheinga whakahaere whakahaere me te tiaki kaha Ka whakaratohia e te OTN ngā āheinga whakahaere whakahaere rite ki te SDH, ā, ko te hanganga anga OTN o te paparanga Hongere Whatu OTN (OCh) ka tino whakarei ake i ngā āheinga aroturuki mamati o tēnei paparanga. Hei tāpiri, ka whakaratohia hoki e te OTN he mahi aroturuki hononga raupapa kōpuku (TCM) 6-paparanga, e taea ai te mahi aroturuki mahi pito-ki-te-mutunga me te maha o ngā wāhanga i te wā kotahi i te wā e whatunga OTN ana. Ka whakaratohia he tikanga whakahaere tika mō te tuku whakawhiti-kaiwhakahaere.
4. Ngā āheinga whatunga me te tiaki kua whakarei ake Mā te whakaurunga o te hanganga anga OTN, te whakawhiti ODUk me te multiplexer whatu whirihora-maha-ahu (ROADM), kua tino whakarei ake te āheinga whatunga o te whatunga kawe whatu, ā, ko te whānui o te whakaritenga 12/VC-4 e hangai ana ki te SDHVC me te āhua o nāianei o te WDM pūwāhi-ki-pūwāhi e whakarato ana i te whānui o te tuku kaha-nui. Mā te whakamahi i te hangarau whakatikatika hapa whakamua (FEC) ka nui ake te tawhiti o te tuku paparanga whatu. Hei tāpiri, ka whakaratohia e te OTN ngā mahi tiaki ratonga ngāwari ake e hangai ana ki te paparanga hiko me te paparanga whatu, pērā i te tiaki hononga whatunga photonic e hangai ana ki te paparanga ODUk (SNCP) me te tiaki whatunga mowhiti tiritahi, te tiaki hongere whatu e hangai ana ki te paparanga whatu, te tiaki wāhanga maha-paparanga rānei, me ētahi atu. Engari kāore anō kia whakapūmautia te hangarau mowhiti tiritahi.
Wā tuku: Whiringa-ā-rangi-01-2022