Umuyoboro wa EPON ukoresha uburyo bwa FTTB kugirango ube umuyoboro, kandi ibice byibanze byurusobe niOLTnaONU. UwitekaOLTitanga ibyambu byinshi bya PON kubikoresho byo mu biro bikuru kugirango uhuzeONUibikoresho;ONUni ibikoresho byabakoresha kugirango batange amakuru ajyanye nijwi ryijwi kugirango bamenye serivisi zabakoresha. Kumenyekanisha uburyo bwo kubona serivisi zitandukanye ni ugukoresha ibirango bitandukanye bya VLAN kubakoresha bitandukanye na serivisi zitandukanye kugirango wohereze mu mucyo kuri seriveri ihuye na seriveri, hanyuma wohereze bihuye na VLAN tagi kumurongo wa IP itwara kugirango wohereze.

1.Iriburiro ryumuyoboro wa EPON

EPON (Ethernet Passive Optical Network) ni tekinoroji ya optique ya fibre igera kumurongo wa tekinoroji, ifata imiterere-kuri-kugwiza, uburyo bwo kohereza fibre optique, bushingiye kumurongo wihuta wa Ethernet hamwe na TDM igihe cyo kugabana MAC (MediaAccessControl) uburyo bwo kugenzura itangazamakuru . Ikoresha tekinoroji ya PON kurwego rwumubiri, protocole ya Ethernet kumurongo uhuza, kandi ikoresha topologiya ya PON kugirango igere kuri Ethernet. Kubwibyo, ikomatanya ibyiza byikoranabuhanga rya PON hamwe na tekinoroji ya Ethernet: igiciro gito, umurongo mwinshi, kwaguka gukomeye, kuvugurura serivisi byihuse kandi byihuse, guhuza na Ethernet ihari, gucunga neza, nibindi.

EPON irashobora kumenya guhuza amajwi, amakuru, videwo, na serivisi zigendanwa. Sisitemu ya EPON igizwe ahaniniOLT(umurongo wa optique)ONU.

Ibikoresho byurusobe rukora birimo ibikoresho byo mu biro bikuru (OLT) hamwe na optique y'urusobe (ONU). Igice cya optique (ONU) itanga abakoresha intera hagati yamakuru, videwo, numuyoboro wa terefone na PON. Uruhare rwambere rwaONUni kwakira ibimenyetso bya optique hanyuma ukabihindura muburyo busabwa numukoresha (Ethernet, IP isakaza, terefone, T1 / E1, nibindi).OLTibikoresho bihujwe numuyoboro wa IP ukoresheje fibre optique. Intangiriro ya optique yo kubona imiyoboro ifite ubuso bugera kuri 20km, byemeza koOLTIrashobora kuzamurwa kuri gakondo ya metropolitani ihuza kuva murwego rwambere rwo kubaka imiyoboro ya optique, bityo byoroshya imiterere y'urusobekerane rw'urusobe rwo guhuza imiyoboro kandi ikabika umubare wibiro byanyuma. Mubyongeyeho, ibiranga imiyoboro ya optique igera kumurongo munini, kwaguka kwinshi, kwizerwa cyane, hamwe na serivise nyinshi za QoS urwego rwo gufashanya nabyo byatumye ihindagurika ryurusobe rwinjira rugana kumurongo uhuriweho, uhuriweho, kandi ukora neza.

2.Amahame shingiro yumurongo wa EPON

Sisitemu ya EPON ikoresha tekinoroji ya WDM kugirango igere ku cyerekezo kimwe cya fibre fibre imwe, ikoresheje hejuru ya 1310nm no kumanuka wa 1490nm yumurambararo wohereza amakuru nijwi, kandi serivisi za CATV zikoresha uburebure bwa 1550nm kugirango zitware.OLTishyirwa ku biro bikuru kugirango igabanye kandi igenzure umuyoboro uhuza, kandi ifite ibikorwa-byo kugenzura-igihe, gucunga no gufata neza. UwitekaONUni Kuri i Umukoresha Uruhande, naOLTnaONUbahujwe muburyo bwa 1: 16/1: 32 binyuze mumurongo wo gukwirakwiza optique.

Kugirango utandukanye ibimenyetso nabakoresha benshi kuri fibre imwe, tekinike ebyiri zikurikira zirashobora gukoreshwa.

1) Inzira yo hasi yamakuru ikoresha tekinoroji yo gutangaza.

Muri EPON, inzira yohereza amakuru yoherejwe kuvaOLTKuri byinshiONUyoherejwe namakuru yo gutangaza amakuru. Ibyatanzwe Byanyuze Hasi Kuva iOLTKuri byinshiONUmuburyo bwa variable-uburebure bwa paki.Buri paki yamakuru afite anEPONpaki y'umutwe, igaragaza idasanzwe niba amakuru yamapaki yoherejweONU-1,ONU-2 cyangwaONU-3. Irashobora kandi kumenyekana nkigipapuro cyohereza kuri boseONUcyangwa kuri runakaONUitsinda (paki nyinshi). Iyo amakuru ageze kuriONU, iONUyakira kandi ikamenya amakuru yamapaki yoherejwe binyuze muri adresse ihuza, kandi ikajugunya amakuru yamapaki yoherejwe kubindiONU. LLID idasanzwe yatanzwe nyuma yaONUyanditswe; iOLTkugereranya LLID kwiyandikisha kurutonde mugihe wakiriye amakuru, nigihe iyoONUyakira amakuru, yakira gusa amakadiri cyangwa gutangaza amakadiri ahuye na LLID yayo.

2) Hejuru yamakuru atemba akoresha tekinoroji ya TDMA.

UwitekaOLTkugereranya urutonde rwa LLID mbere yo kwakira amakuru; buri umweONUKohereza amakuru kumurongo mugihe cyagenwe kimwe nibikoresho byo mubiro bikuruOLT; umwanya wagenwe (binyuze mu ikorana buhanga) yishyura intera iri hagati ya buriONUkandi yirinda buri kimweONUKugongana hagati.