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, kowane ONU na 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 cikin ONUs da OLTs.

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 yana rage adadin laser da ake buƙata ta ofishin tsakiya, kuma yawancin masu amfani da ONU suna raba OLT.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 farashin ONU, mabuɗin fasaha naEPONLayer na zahiri yana mai da hankali kan OLT, gami da: saurin aiki tare da fashe sigina, aiki tare na cibiyar sadarwa, ikon sarrafa na'urorin transceiver na gani, da liyafar daidaitacce.

Tunda siginar da OLT ya karɓa shine siginar fashewa ta kowane ONU, OLT dole ne ya sami damar daidaita aiki tare 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 ƙari, saboda nisa daban-daban na kowane ONU daga OLT, don tsarin karban OLT, ikon lokutan lokaci daban-daban ya bambanta.A cikin aikace-aikacen DBA, har ma da ikon ramin lokaci guda ya bambanta, wanda ake kira sakamako na kusa-kusa.Saboda haka, OLT dole ne ya sami damar daidaita matakan matakin "0" da "1" da sauri.Don magance "sakamako mai nisa", an ba da shawarar tsarin sarrafa wutar lantarki, kuma OLT ta sanar da ONU matakin watsa wutar lantarki ta hanyar fakitin aiki da kulawa (OAM) bayan jere.Domin wannan makircin zai ƙara farashin ONU da sarƙaƙƙiyar ƙa'idar Layer na zahiri, da iyakance aikin watsa layin zuwa matakin ONU mafi nisa daga OLT, ƙungiyar aiki na EFM ba ta karbe shi ba.