N'oge a, ụlọ ọrụ nzikọrịta ozi nke China na-etolite ngwa ngwa, a na-akwalitekwa modul fiber optic na-aga n'ihu ma kwalite ya.Mpụta nke modul ngwa anya dị elu nke PON ejirila nke nta nke nta dochie eriri anya ngwa anya dị ala ma ejiri ya mee ihe.E kewara PON ka ọ bụrụ GPON na EPON.Enwere ike iji GPON mee ihe.Ekwuru na ọ bụ ụdị EPON emelitere.
Kedu ihe kpatara ịchọrọ ịtụba GPON?
GPON nwere ọnụ ọgụgụ Gigabit dị elu, 92% bandwidth itinye n'ọrụ na ikike iji kwado nnyefe transperent nke ọtụtụ ọrụ, ebe ị na-ahụ àgwà nke ọrụ na ọkwa, na-enye nlekota netwọk nke ụgbọelu-klaasị na njikwa ọrụ.
Tụnyere ojiji bandwit, ọnụ ahịa, nkwado ọtụtụ ọrụ na ọrụ OAM, GPON dị mma karịa EPON:
1.Bandiwidth Utilization: N'otu aka, EPON na-eji 8B / 10B encoding, nke n'onwe ya na-ewebata ọnwụ 20%.Ọnụego nnyefe nke 1.25 Gbit/s bụ naanị 1 Gbit/s tupu usoro nhazi.
2.Cost: N'ihe gbasara ọnụ ahịa otu-bit, ọnụ ahịa GPON dị ala karịa nke EPON.
3.Multi-service support: EPON nnyefe nke omenala TDM ọrụ na-adịkarị mfe na nsogbu QoS. Ụdị ngwugwu pụrụ iche nke GPON na-enyere ya aka ịkwado ọrụ ATM na ọrụ IP, iji nweta ezi ọrụ zuru oke.
Ọrụ 4.OAM: EPON naanị na-achịkwa ọrụ ndị bụ isi dị ka ihe ngosi mmejọ dịpụrụ adịpụ, njikwa loopback dịpụrụ adịpụ, na nlekota njikọ, ebe ọrụ OAM ndị ọzọ dị elu na-abawanye onwe ha site n'aka onye nrụpụta na ngwaọrụ ahụ. Ọrụ GPON OAM gụnyere ntinye onyinye bandwidth, ikenye bandwidth ike. (DBA), nlekota njikọ, mgbanwe nchebe, mgbanwe igodo, na ọrụ mkpu dị iche iche.Site na ọkọlọtọ ọkọlọtọ, ozi GPON OAM bara ụba karịa EPON.
Kedu ụdị nnyefe abụọ nke GPON:
Otu bụ ATM mode na nke ọzọ bụ GPON ngwugwu (GEM) mode.N'ime usoro nnyefe, GPON nwere ike iji ATM mode ma ọ bụ GEM mode, ma ọ bụ abụọ ụdịdị nwere ike iji ọnụ.Kedu ụdị ị ga-eji, họrọ mgbe GPON malitere. eriri anya nwere uru nke obere ọnwụ na nchekwa akụ.N'ịtụle ọtụtụ ngwa brọdband n'ọdịnihu, mba ndị ọzọ na-eji eriri anya eme ihe dị ka mgbasa ozi.