EPON VS GPON: Dziwani Kusiyana

Pankhani ya ma network a broadband, ukadaulo awiri odziwika bwino akhala opikisana kwambiri popereka mautumiki apaintaneti othamanga kwambiri: EPON ndi GPON. Ngakhale onsewa ali ndi magwiridwe antchito ofanana, ali ndi kusiyana kwakukulu komwe ndikofunikira kufufuza kuti mumvetse luso lawo ndikusankha lomwe likuyenererani zosowa zanu.

EPON (Ethernet Passive Optical Network) ndi GPON (Gigabit Passive Optical Network), njira zodziwika bwino zogawira maulumikizidwe a intaneti othamanga kwambiri kwa ogwiritsa ntchito pogwiritsa ntchito ukadaulo wa fiber optic. Ndi gawo la banja la ukadaulo wa Passive Optical Network (PON); komabe, zimasiyana mu kapangidwe ndi magwiridwe antchito.

Kusiyana kwakukulu pakati pa EPON ndi GPON ndi gawo lawo la media access control (MAC). EPON imagwiritsa ntchito Ethernet, ukadaulo womwewo womwe umagwiritsidwa ntchito mu ma network am'deralo (LAN) ndi ma network am'deralo (WAN). Pogwiritsa ntchito Ethernet, EPON imapereka mgwirizano ndi machitidwe omwe alipo a Ethernet, zomwe zimapangitsa kuti ikhale njira yosinthika kwambiri kwa ogwiritsa ntchito ma network.GPONKumbali inayi, imagwiritsa ntchito ukadaulo wa Asynchronous Transfer Mode (ATM), njira yakale koma yogwiritsidwa ntchito kwambiri yotumizira deta. Ubwino wogwiritsa ntchito ATM mu netiweki ya GPON ndikuti imatha kupereka mautumiki atatu osewerera (mawu, makanema ndi deta) pa nsanja yogawanitsa, motero kuonetsetsa kuti bandwidth ikugwiritsidwa ntchito bwino.

Kusiyana kwina kwakukulu ndi liwiro la kutumiza deta pansi ndi pamwamba. EPON nthawi zambiri imapereka liwiro lofanana, zomwe zikutanthauza kuti liwiro lotsitsa ndi kukweza ndi lofanana. Mosiyana ndi zimenezi, GPON imagwiritsa ntchito njira yosafanana yomwe imalola liwiro lalikulu pansi ndi liwiro lochepa pamwamba. Izi zimapangitsa GPON kukhala yoyenera mapulogalamu omwe amafunikira liwiro lofulumira lotsitsa deta, monga kutsitsa makanema ndi kusamutsa mafayilo akuluakulu. Mosiyana ndi zimenezi, liwiro la EPON lofanana limapangitsa kuti ikhale yoyenera kwambiri mapulogalamu omwe amadalira kwambiri kutumiza deta mofanana, monga misonkhano yamavidiyo ndi mautumiki amtambo.

Ngakhale kuti EPON ndi GPON zonse zimathandizira zomangamanga za ulusi womwewo, ukadaulo wawo wa OLT (Optical Line Terminal) ndi ONT (Optical Network Terminal) ndi wosiyana. GPON imatha kuthandizira ma ONT ambiri pa OLT iliyonse, zomwe zimapangitsa kuti ikhale chisankho choyamba pamene vuto la kukula kwake limakhalapo. Komabe, EPON ili ndi malo otalikirapo, zomwe zimathandiza ogwiritsa ntchito ma netiweki kukulitsa kulumikizana kwawo kuchokera ku ofesi yayikulu kapena malo ogawa. Izi zimapangitsa EPON kukhala yothandiza pophimba madera akuluakulu.

Poganizira za mtengo, EPON ndi GPON zimasiyana malinga ndi ndalama zoyambira kukhazikitsa. Chifukwa cha kapangidwe kake ka ATM, GPON imafuna zida zovuta komanso zodula kwambiri. Mosiyana ndi zimenezi, EPON imagwiritsa ntchito ukadaulo wa Ethernet, womwe umagwiritsidwa ntchito kwambiri komanso wotsika mtengo. Komabe, ndikofunikira kudziwa kuti pamene ukadaulo ukukwera ndipo ogulitsa ambiri akulowa pamsika, kusiyana kwa mtengo pakati pa njira ziwirizi kukuchepa pang'onopang'ono.

Mwachidule, EPON ndi GPON zonse ndi njira zabwino zoperekera intaneti yothamanga kwambiri. Kugwirizana kwa EPON ndi Ethernet komanso liwiro lofanana kumapangitsa kuti ikhale yokongola kwa mabizinesi ndi mapulogalamu okhala ndi anthu ambiri omwe amafunikira kutumiza deta moyenera. Kumbali ina, kugwiritsa ntchito kwa GPON ATM ndi liwiro losagwirizana kumapangitsa kuti ikhale chisankho choyamba cha mapulogalamu omwe amafunikira kuthamanga kofulumira. Kumvetsetsa kusiyana pakati pa EPON ndi GPON kudzathandiza ogwiritsa ntchito ma netiweki ndi ogwiritsa ntchito kupanga zisankho zodziwa bwino posankha ukadaulo womwe ukugwirizana bwino ndi zosowa zawo.