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 kunoita 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 iyo EPON yekumusoro chiteshi iri nguva-kupatsanurwa kwakapetwa nevoseONUs, imwe neimweONUinogona kutumira data mukati menguva yakatarwa hwindo. Naizvozvo, iyo EPON yekumusoro chiteshi inotumira masaini ekuputika, izvo zvinoda kushandiswa kwemidziyo yemaziso inotsigira kuputika masaini mukati.ONUsuyeOLTs.
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 iyoOLTinogovaniswa nevakawandaONUvashandisi. 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 kuderedza mari yeONU, iyo yakakosha tekinoroji yeEPONphysical layer inonangana neOLT, kusanganisira: kukurumidza kuwiriranisa kwezviratidzo zvinoputika, network synchronization, simba rekutonga kwe optical transceiver modules, uye kugadzirisa kugamuchira.
Sezvo chiratidzo chakagamuchirwa neOLTchiratidzo chekuputika kweumwe neumweONU, ivoOLTinofanirwa kukwanisa kuwiriranisa chikamu 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 eumwe neumweONUkubva kuOLT, yekugamuchira module yeOLT, simba renguva dzakasiyana-siyana rakasiyana. Mukushandiswa kweDBA, kunyange simba renguva imwechete slot rakasiyana, iro rinonzi pedyo-kure maitiro. Naizvozvo, theOLTinofanira kukwanisa kukurumidza kugadzirisa "0" uye "1" nhanho dzesarudzo. Kuti ugadzirise iyo "kure-pedyo mhedzisiro", chirongwa chekutonga simba chakatsanangurwa, uye iyoOLTinozivisaONUyedanho remagetsi rekufambisa kuburikidza nekushanda uye kugadzirisa manejimendi (OAM) mapaketi mushure mekubva. Nekuti chirongwa ichi chichawedzera iyo ONU mutengo uye kuoma kweiyo yemuviri layer protocol, uye kudzikisira mutsara wekufambisa kuita kuneONUnhanho iri kure kwazvo kubva paOLT, haina kugamuchirwa neboka rekushanda reEFM.