Koia te whatunga tuku tuara o te reanga e whai ake nei.Me korero noa, he whatunga kawe waka a muri ake nei i runga i te roangaru.
Ko te OTN he whatunga kawe i runga i te hangarau whakatikitanga wehenga roangaru e whakarite ana i te whatunga ki te paparanga whatu, a ko te whatunga kawe tuara o te reanga e whai ake nei. OTNhe reanga hou o te "pūnaha tuku mamati" me te "pūnaha tuku whatu" kua whakaritea e te raupapa o nga taunakitanga ITU-T penei i te G.872, G.709, me te G.798.Ka whakaotihia te raruraru o te kore ratonga roangaru / iti-roa i roto i nga whatunga WDM tuku iho.Ko nga raruraru penei i te ngoikore o te kaha ki te whakarite, te ngoikore o te whatunga, me te ngoikore o te kaha tiaki.Ka whakatauhia e OTN etahi rapanga maha o nga punaha tuku iho na roto i nga raupapa kawa.
Ko te OTN te rohe hiko tuku iho (whakawhitinga mamati) me te rohe whatu (whakawhitinga tairitenga), a he paerewa whakakotahi mo te whakahaere i nga rohe hiko me te whatu.
Ko te kaupapa taketake o Tukatuka OTNhe pakihi taumata-roangaru, e turaki ana i te whatunga kawe ki te waahi o te whatunga whatu roangaru-maha pono.Na te whakakotahitanga o nga painga o te rohe whatu me te tukatuka rohe hiko, ka taea e OTN te whakarato i te kaha whakawhiti nui, te tino marama o te mutunga-ki-mutunga te roangaru / hononga iti-roa me te tiaki-akomanga kawe, a ko te hangarau tino pai mo te tuku whanui whanui. - ratonga matūriki.
painga matua
Ko te painga nui o te OTN ko te tino hototahi whakamuri, ka taea e ia te hanga i runga i nga mahi whakahaere SONET/SDH o naianei, ehara i te mea e tino marama ana nga tikanga whakawhitiwhiti korero o naianei, engari e whakarato ana i te hononga mutunga-ki-mutunga me te kaha o te whatunga mo te WDM , E whakarato ana i te whakatakotoranga o te hononga whatu whatu mo ROADM, me te taapiri i te whakahiatotanga o te roangaru-iti me te kaha o te whakapaipai.Ko te hononga mutunga-ki-te-mutunga me nga kaha o te whatunga ka tino whakapumautia i runga i te SDH, ka whakaratohia he tauira o te paparanga whatu.
Ko te ariā OTN e hipoki ana i te papanga whatu me te whatunga paparanga hiko, a ko tana hangarau ka whakawhiwhia ki nga painga takirua o SDH me WDM.Ko nga waahanga hangarau matua e whai ake nei:
1. He rereke nga tohu tohu a te kiritaki me te whakawhiti maramara Ko te hanganga anga OTN i runga i te ITU-TG.709 ka taea te tautoko i te mahere me te whakawhiti marama o nga momo tohu a te kiritaki, penei i te SDH, ATM, Ethernet, me etahi atu. mo te SDH me te ATM, engari he rereke te tautoko mo te Ethernet i nga reiti rereke.Ko te ITU-TG.sup43 e whakarato ana i nga tohutohu taapiri mo nga ratonga 10GE ki te whakatutuki i nga nekehanga rereke o te whakawhiti marama, engari mo te GE, 40GE, 100GE Ethernet, ratonga whatunga tūmataiti Fiber Channel (FC) me te uru ki nga ratonga whatunga Gigabit Passive Optical Network (GPON) ), etc ., kei te matapakihia te tikanga mahere paerewa ki te anga OTN.
2. Ko te whakawhitinga whanui, te whakawhiti me te whirihoranga o nga matūriki nui Ko nga matūriki paparanga hiko kua tautuhia e OTN he waeine raraunga hongere whatu (O-DUk, k=0,1,2,3), ara ODUO(GE,1000M/S)ODU1 (2.5Gb / s), ODU2 (10Gb / s) me ODU3 (40Gb / s), he roangaru te whanui o te papaarangi o te paparanga whatu, ka whakaritea ki te mahinga o te SDH VC-12 / VC-4, OTN multiplexing, whakawhiti. a Ko nga matūriki whirihora he tino nui ake, ka taea te whakapai ake i te urutau me te pai o te tuku o nga ratonga kiritaki raraunga whanui-nui.
3. Nga kaha whakahaere o runga me te whakahaere tiaki OTN e whakarato ana i nga mana whakahaere o runga e rite ana ki te SDH, a ko te anga anga OTN o te paparanga OTN Optical Channel (OCh) ka tino whakarei ake i nga kaha o te aroturuki mamati o tenei paparanga.I tua atu, ka whakarato ano hoki a OTN i te mahi 6-papahanga rangatū honohono hono (TCM), e taea ai te mahi i te mutunga-ki-te-mutunga me te maha o nga waahanga aroturuki i te wa kotahi i te wa o te whatunga OTN.Ka whakarato i nga tikanga whakahaere tika mo te whakawhiti-whakawhiti.
4. Whakanuia te whatunga me te kaha tiaki Na roto i te whakaurunga o te anga anga OTN, te whakawhiti ODUk me te maha-ahu-maha ka taea te whirihora ano i te optical add-drop multiplexer (ROADM), kua tino whakanuia te kaha o te whatunga o te whatunga kawe waka, me te SDHVC-based 12 /VC-4 whakahōtaka hōkaiipurangi me te mana o te WDM ira-ki-ira e whakarato ana i te bandwidth whakawhiti kaha nui.Ko te tango i te hangarau whakatika hapa whakamua (FEC) ka tino whakanui ake te tawhiti o te tuku paparanga whatu.I tua atu, ka whakaratohia e te OTN nga mahi whakamarumaru ratonga ngawari ake i runga i te paparanga hiko me te paparanga whatu, penei i te whakamarumaru hononga hononga whatunga whakaahua (SNCP) a ODUk me te whakamarumaru whatunga mowhiti tiritiri, te hongere whatu-a-whatu-a-ringa, te whakamarumaru waahanga multiplex ranei, etc Engari ko te hangarau mowhiti tiritiri kaore ano kia paerewatia.
Wā tuku: Noema-01-2022