1.1 Mai raba gani na gani

Mai raba gani na gani shine muhimmin sashi na hanyar sadarwar PON. Ayyukan mai raba gani na gani shine raba ikon gani na siginar gani guda ɗaya zuwa abubuwan da yawa. Yawanci, mai rarraba yana samun rabewar haske daga 1:2 zuwa 1:32 ko ma 1:64. Siffar m na gani splitter shine cewa baya buƙatar samar da wutar lantarki kuma yana da ƙarfin daidaita yanayin muhalli. Tunda tashar EPON na sama ta kasance mai rarrabuwar lokaci da kowaONUs, kowaONUzai iya aika bayanai a cikin ƙayyadadden tagar lokaci. Don haka, tashar EPON ta sama tana watsa siginar fashewa, wanda ke buƙatar amfani da na'urorin gani waɗanda ke goyan bayan fashe sigina a ciki.ONUkumaOLTs.

Masu raba na gani na gani a cikin hanyoyin sadarwar PON gabaɗaya an kasu zuwa nau'i biyu: na gargajiya fusion taper splitter da kuma sabon tsarin shirin na gani waveguide splitter.

1.2 Ilimin yanayin jiki

Cibiyar sadarwa ta EPON tana ɗaukar tsarin topology mai ma'ana-zuwa-multipoint maimakon tsari-zuwa-aya, wanda ke adana adadin fiber na gani da ƙimar gudanarwa sosai. PONOLTkayan aiki rage yawan Laser da ake bukata ta tsakiyar ofishin, da kumaOLTda yawa ke rabaONUmasu amfani. Bugu da ƙari, EPON yana amfani da fasahar Ethernet da daidaitattun firam ɗin Ethernet don ɗaukar sabis na yau da kullun na yau da kullun-sabis na IP ba tare da wani canji ba.

1.3 Fashe aiki tare na EPON na zahiri

Domin rage farashinONU, mabuɗin fasaha naEPONLayer na jiki sun mayar da hankali akanOLT, gami da: saurin aiki tare da fashe sigina, aiki tare na cibiyar sadarwa, sarrafa iko na na'urorin transceiver na gani, da liyafar daidaitacce.

Tun da siginar da aka karɓa taOLTsiginar fashewa ce ta kowaneONU, daOLTdole ne ya iya cimma aiki tare na lokaci a cikin ɗan gajeren lokaci, sannan karɓar bayanai. Bugu da kari, saboda tashar uplink tana ɗaukar yanayin TDMA, kuma fasahar jinkirin watsawar fiber na gani mai nisan kilomita 20 yana fahimtar aiki tare na lokaci guda na duk hanyar sadarwa, fakitin bayanan suna zuwa a lokacin ramin da OBA algorithm ya ƙaddara. Bugu da kari, saboda bambancin nisan kowaneONUdagaOLT, don karɓar module naOLT, ikon daban-daban ramummuka lokaci daban. A cikin aikace-aikacen DBA, har ma da ikon ramin lokaci guda ya bambanta, wanda ake kira sakamako na kusa-kusa. Saboda haka, daOLTdole ne ya sami damar daidaita matakan matakin "0" da "1" da sauri. Domin warware "tasirin kusa", an tsara tsarin sarrafa wutar lantarki, da kumaOLTsanar daONUna matakin watsa wutar lantarki ta hanyar fakitin aiki da kulawa (OAM) bayan jere. Domin wannan makirci zai ƙara farashin ONU da rikitacciyar ka'idar Layer na zahiri, da iyakance aikin watsa layin zuwa gaONUmatakin mafi nisa dagaOLT, ƙungiyar aiki ta EFM ba ta karɓe ta ba.