1.1 Passive Optical splitter
Passive Optical splitter chinhu chakakosha chePON network.Basa reiyo passive optical splitter ndere kupatsanura simba rekuona reimwe yekuisa chiratidzo chechiratidzo mune zvakawanda zvinobuda.Kazhinji, kupatsanura kunowana kupatsanurwa kwechiedza kubva pa1:2 kusvika pa1:32 kana kunyange 1:64.Chimiro che passive optical splitter ndechekuti haidi magetsi uye ine yakasimba yekuchinjika kwezvakatipoteredza.Sezvo EPON yekumusoro chiteshi iri nguva-kupatsanurwa kwakapetwa nevoseONUs, ONU yega yega inogona kutumira data mukati menguva yakatarwa hwindo.Naizvozvo, iyo EPON yekumusoro chiteshi inotumira zviratidzo zvinoputika, izvo zvinoda kushandiswa kwemidziyo yemaziso inotsigira kuputika masaini muONU neOLTs.
Passive optical splitters muPON network anowanzo kupatsanurwa kuita mhando mbiri: yechinyakare fusion taper splitter uye ichangobva kubuda planar optical waveguide splitter.
1.2 Musoro wezvemuviri
Iyo EPON network inotora point-to-multipoint topology chimiro panzvimbo yekunongedza-ku-point chimiro, iyo inochengetedza zvakanyanya huwandu hwefiber optical uye manejimendi mari.PONOLTmidziyo inoderedza huwandu hwemalaser anodiwa nehofisi yepakati, uye OLT inogovaniswa nevazhinji vashandisi veONU.Pamusoro pezvo, EPON inoshandisa tekinoroji yeEthernet uye mafuremu akajairwa eEthernet kutakura sevhisi yemazuva ano yeruzhinji—IP service pasina kutendeuka.
1.3 Burst kuwiriranisa kweEPON yemuviri layer
Kuti uderedze mutengo weONU, iwo akakosha matekinoroji eEPONMuviri wemuviri wakatarisana neOLT, kusanganisira: kukurumidza kuwiriranisa kweanoputika masaini, network synchronization, simba rekudzora optical transceiver modules, uye adaptive kugamuchira.
Sezvo chiratidzo chakagamuchirwa neOLT chiri chiratidzo chinoputika cheONU yega yega, iyo OLT inofanirwa kukwanisa kuzadzisa chikamu chekubatanidza munguva pfupi, uye wozogamuchira data.Pamusoro pezvo, nekuti iyo uplink chiteshi inotora iyo TDMA modhi, uye iyo 20km optical fiber transmission kunonoka muripo tekinoroji inoziva iyo nguva slot yekubatanidza yetiweki yese, mapaketi edata anosvika panguva yakatarwa neOBA algorithm.Mukuwedzera, nekuda kwemadaro akasiyana eONU imwe neimwe kubva kuOLT, nokuda kwekugamuchira module yeOLT, simba renguva dzakasiyana-siyana dzakasiyana.Mukushandiswa kweDBA, kunyange simba renguva imwechete slot rakasiyana, iro rinonzi pedyo-kure maitiro.Naizvozvo, iyo OLT inofanirwa kukwanisa kukurumidza kugadzirisa "0" uye "1" nhanho dzesarudzo.Kuti ugadzirise "kure-kure-kure", chirongwa chekutonga simba chakarongwa, uye OLT inozivisa ONU yedanho remagetsi ekufambisa kuburikidza nekushanda uye kuchengetedza manejimendi (OAM) mapaketi mushure mekubva.Nemhaka yokuti chirongwa ichi chichawedzera mutengo weONU uye kuoma kwemuviri wepamusoro weprotocol, uye kudzikamisa mutsara wekufambisa kushanda kusvika kuzinga reONU kure kure neOLT, harina kugamuchirwa neboka rekushanda reEFM.