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 central office equipment-optical line terminal, iyo yakabatanidzwa nekutumira michina.Zvikamu zvikuru zvehurongwa ndeye OLT uye kure kure.ONU.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 reOLT nderekupa chinongedzo pakati petiweki yekuwana uye switch yemuno, uye kutaurirana neiyo optical network unit padivi remushandisi kuburikidza nekutapurirana kwemaziso.Iyo inoparadzanisa zvachose basa rekushandura rekushandura kubva kune mushandisi kuwana.Iyo optical line terminal inopa kugadzirisa uye kutarisa kwayo pachayo uye yekupedzisira mushandisi.Inogona kuiswa zvakananga pamagumo ehofisi yekutsinhana pamwe chete nekutsinhana kwenzvimbo, kana inogona kuiswa kumucheto uri kure.
Basa reONU nderekupa 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 reONU nderekumisa optical fiber kubva kuOLT, kugadzirisa chiratidzo chemaziso uye kupa nzvimbo dzebasa kune akawanda mabhizinesi madiki, vashandisi vebhizinesi uye vashandisi vekugara.Iyo network yekupedzisira yeONU ndeye optical interface, uye magumo emushandisi wayo ndeyemagetsi.Naizvozvo, ONU ine optical/electric and electric/optical conversion function.Iyo ine zvakare mabasa edhijitari / analog uye analog / dijitari shanduko yenhaurirano.Iyo ONU inowanzoiswa 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.