Masiku ano, makampani olankhulana ku China akukula mwachangu, ndipo ma module a fiber optic amakonzedwa mosalekeza ndikusinthidwa.Kuwonekera kwa PON high-performance optical modules pang'onopang'ono kwalowa m'malo mwa ulusi wamakono otsika kwambiri ndipo amagwiritsidwa ntchito kwambiri.PON imagawidwa kukhala GPON ndi EPON.GPON ikhoza kugwiritsidwa ntchito.Anati ndi mtundu wokwezedwa wa EPON.
Chifukwa chiyani mukufuna kupanga GPON?
GPON ili ndi chiwerengero chachikulu cha Gigabit, 92% yogwiritsira ntchito bandwidth komanso kuthekera kuthandizira kufalitsa kowonekera kwa mautumiki ambiri, ndikuwonetsetsa kuti ntchito yabwino ndi mlingo, ndikupereka kuyang'anira maukonde onyamulira ndi kayendetsedwe ka ntchito.
Poyerekeza ndi kugwiritsidwa ntchito kwa bandwidth, mtengo, chithandizo chamitundu yambiri, ndi ntchito za OAM, GPON ndiyabwino kuposa EPON:
1.Bandwidth Utilization: Kumbali imodzi, EPON imagwiritsa ntchito encoding ya 8B/10B, yomwe imayambitsa kutayika kwa 20%.Mlingo wotumizira wa 1.25 Gbit/s kwenikweni ndi 1 Gbit/s musanayambe ndondomeko yokonza.
2.Cost: Pankhani ya mtengo umodzi, mtengo wa GPON ndi wotsika kuposa wa EPON.
3.Thandizo la mautumiki ambiri: Kutumiza kwa EPON kwa mautumiki a TDM achikhalidwe kumakhala kovuta ku mavuto a QoS.Mtundu wapadera wa phukusi la GPON umathandiza kuthandizira ma ATM ndi mautumiki a IP, kuti akwaniritse ntchito yeniyeni yeniyeni.
Ntchito ya 4.OAM: EPON imangoyang'anira ntchito zoyambira monga chizindikiritso chakutali, kuwongolera kwakutali, ndi kuyang'anira maulalo, pomwe ntchito zina zapamwamba za OAM zimachulukitsidwa modziyimira pawokha ndi wopanga mu chipangizocho.GPON OAM ntchito zikuphatikizapo kugawa kwa bandwidth, kugawa kwamphamvu kwa bandwidth. (DBA), kuyang'anira ulalo, kusinthana kwachitetezo, kusinthana makiyi, ndi ntchito zosiyanasiyana zama alarm.Kuchokera pamawonedwe anthawi zonse, zambiri za GPON OAM ndizochuluka kuposa EPON.
Kodi njira ziwiri zotumizira za GPON ndi ziti:
Imodzi ndi ATM mode ndipo ina ndi GPON phukusi (GEM) mode.Mu njira yotumizira, GPON ikhoza kugwiritsa ntchito ATM mode kapena GEM mode, kapena mitundu yonseyi ingagwiritsidwe ntchito palimodzi.Njira yoti mugwiritse ntchito, sankhani pamene GPON yakhazikitsidwa.Chingwe chowoneka bwino chimakhala ndi ubwino wochepa wotayika komanso kusunga zinthu.Poganizira ntchito zambiri zamabroadband m'tsogolomu, maiko ochulukirachulukira amagwiritsa ntchito ulusi wa kuwala ngati njira yopatsira.