Chii chinonzi network chimiro cheOptical Access Network (OAN)
Optical access network (OAN) inoreva kushandiswa kwefiber optical senzira huru yekufambisa kuona basa rekufambisa ruzivo retiweki yekuwana. Iyo yakabatana kune node yebasa kuburikidza neiyo optical line terminal (OLT), uye yakabatana kumushandisi kuburikidza neiyo optical network unit (ONU) Iyo optical fiber access network inosanganisira kure midziyo-optical network unit uye yepakati hofisi midziyo-optical line terminal, iyo yakabatana nemichina yekufambisa.Zvikamu zvikuru zvehurongwa ndizvoOLTuye kureONU.Vanopedzisa kushandurwa kwezvibvumirano zvechiratidzo kubva kune service node interface (SNI) kusvika kune user network interface (UNI) mune yose yekuwana network. Iyo yekuwana mudziyo pachayo ine zvakare networking kugona uye inogona kugadzira akasiyana siyana etiweki topology. Panguva imwecheteyo, michina yekuwana zvakare ine mabasa ekuchengetedza emunharaunda uye kure kure yekutarisa yekutarisa, kugadzira yekuchengetedza manejimendi network kuburikidza neyakajeka optical kutapurirana, uye kuiunza mune network manejimendi nzvimbo yekubatana manejimendi kuburikidza neino enderana network manejimendi protocol.
Basa reOLTndeyekupa chinongedzo pakati peiyo access network neyemunochinja, uye kutaurirana neiyo optical network unit padivi remushandisi kuburikidza nekutapurirana kwemaziso. Iyo inoparadzanisa zvachose basa rekushandura rechinjakubva mushandisi kuwana. Iyo optical line terminal inopa kugadzirisa uye kutarisa kwayo pachayo uye yekupedzisira mushandisi. Inogona kuiswa zvakananga kumagumo ehofisi yekutsinhana pamwe chete nekutsinhana kwenzvimbo, kana kuti inogona kuiswa kumucheto uri kure.
Basa reONUndeyekupa mushandisi-parutivi interface kune network yekuwana. Inogona kubatanidzwa kune zvakasiyana-siyana zvevashandisi zviteshi, uye panguva imwechete ine photoelectric kutendeuka basa uye inoenderana nekuchengetedza uye kutarisa mabasa. Basa guru reONUndiko kumisa optical fiber kubva kuOLT, gadzirisa chiratidzo chemaziso uye upe nzvimbo dzebasa dzemabhizinesi madiki akawanda, vashandisi vebhizinesi uye vashandisi vekugara. Iyo network yekupedzisira yeONUis an optical interface, uye magumo emushandisi ndeyemagetsi. Naizvozvo,ONUine optical/electric and electric/optical conversion function. Iyo ine zvakare mabasa edhijitari / analog uye analog / dijitari shanduko yenhaurirano. TheONUinowanzoiswa padyo nemushandisi, uye nzvimbo yayo ine kuchinjika kukuru.
Optical Access Network (OAN) yakakamurwa kuva Active Optical Network (AON, Active Optical Network) uye Passive Optical Network (PON, Passive Optica Optical Network) maererano nehurongwa hwekugovera.
Iyo topological chimiro cheiyo optical fiber access network inoreva kurongeka kwejometri yemitsara yekutapurirana nemanodhi. Iyo inoratidza iyo mutual chinzvimbo uye yekubatanidza marongero eimwe neimwe node mune network. Iyo topological chimiro chetiweki chine simba rakakosha pane network basa, mutengo uye kuvimbika. Iwo matatu akakosha maumbirwo epamusoro ndeaya: bhazi-yakaumbwa, yakaita mhete uye yakaita nyeredzi. Kubva pane izvi, bhazi-nyeredzi, mbiri-nyeredzi, mbiri-mhete, bhazi-bhazi uye mamwe akasanganiswa mafomu ekunyorera anogona kutorwa. Imwe neimwe ine maitiro ayo uye mutual supplement.