Site na mmepe nke akụ na ụba na ọganihu mmekọrịta mmadụ na ibe ya, ndị mmadụ na-ezukọta na-agbakọta n'ihu ọha. N'otu oge ahụ, mmebi nke nchekwa ọha na-ewetakwa nnukwu ihe ịma aka n'etiti ọha mmadụ na-emekọ ihe ọnụ. Igwefoto na usoro onyunyo nwere ike inye ọrụ nlekota vidiyo na ndekọ vidiyo na-arụ ọrụ, na-enye ihe ndabere dị mkpa maka nchịkọta ihe ngosi mgbe ọ gasịrị. Mmepe ngwa ngwa nke Igwefoto na usoro nyocha na-enye ụzọ dị irè maka iwu nke "obodo kwekọrọ" .Data anakọtara site na. ihe nchịkọta ihe oyiyi na-ekesa na Igwefoto na usoro nyocha dị mkpa ka ebufe ya na ihe nkesa na ozugbo maka nlele, nyocha na nchịkọta. Data nnyefe ohere netwọk bụ ihe siri ike na-ewu nke obodo nlekota oru nlekota oru netwọk na mkpu, na ọrụ dị mkpa nke. Atụmatụ nnyefe data na-aghọwanye nke pụtara ìhè. EPON, nke nwere ike inye ohere bandwidth dị elu, aghọwo nkà na ụzụ dị mkpa nke nnukwu azụmahịa ya na-adabere na ya.
Site na mmepe nke teknụzụ nzikọrịta ozi, EPON ejirila nke nta nke nta webata teknụzụ n'ọhịa nke nlekota nchekwa. Ọ bụ teknụzụ ịnweta bandwidth nke nhazi netwọkụ point-to-multipoint yana ọnọdụ nnyefe eriri anya na-agafe agafe.
Ugbu a, uru nke teknụzụ EPON na-eji nwayọọ nwayọọ na-egosipụta, ọkachasị na ngwa igwefoto na nleba anya. Mgbe etinyere EPON na ọnọdụ netwọkụ nlekota, ọ nwere ike inye egwuregwu zuru oke maka uru ya nke bandwidth dị elu mgbe ọ na-edozi nnyefe data vidiyo bụ isi na ọnụ ala dị ala, yana njirimara ya dị mfe na nke na-agbanwe agbanwe nwere ike belata ọnụ ahịa na mmezi nke netwọkụ. .
Netwọk EPON nwere uru ndị a:
1.High ntụkwasị obi. EPON bụ nkewa na eriri anya. Ọ nwere ogologo ndụ ọrụ na enweghị akụrụngwa na-arụ ọrụ. Ọ na-ezere ọdịda ike, ọkụ ọkụ, mmebi nke oke na oke ọkụ, wdg. Netwọk nwere ntụkwasị obi dị elu ma belata ụgwọ ọrụ.
2. ọnụ ala. Teknụzụ EPON maka nnyefe eriri otu-isi, na-echekwa ọkara nke eriri karịa nnyefe eriri nkịtị. Tụkwasị na nke ahụ, EPON anaghị achọ ọkụ ọkụ dị n'èzí n'oge nnyefe, ọ dị mfe ịtọgbọ, ma ọ dịghị achọ nrụzi, nke nwere ike ịchekwa ụgwọ ọrụ na ụgwọ njikwa.
3.High bandwit.1Gmps symmetric nnyefe ọnụego, nwere ike mfe izute ebu chọrọ nke video onyunyo ọrụ. The bandwit nke ọ bụlaONUenwere ike ịhazigharị nke ọma n'etiti 2M na 1Gmps. Nkezi bandwidth elu nke iheOLTọdụ ụgbọ mmiri na nke ọ bụlaONUbụ ihe dịka 30M, nke na-emezu ihe niile IPTV chọrọ.
4.EPON nwere arụmọrụ dị elu na-akwụ ụgwọ na ọsọ EPON nwere ike iru otu bandwit dị elu nke elu na mgbada nke 1.25Gb / s. Oke kachasị ọsọ nwere ike iru 10Gb / s, ebe nnyefe kacha elu nwere ike iru 20km, nke dị mma maka ihe ndị ahụ. mkpuchi nke netwọk mpaghara mepere emepe, na n'ụzọ bụ isi na-ekpuchi oke mpaghara nke ọkara.
5.The ịkparịta ụka n'Ịntanet bụ mgbanwe, na kasị elu ngwa anya gbawara ratio bụ 1:64. A na-anabata usoro netwọkụ nke yiri osisi ka ọ na-etolite topology onye ọrụ site na nchikota nke ihe nkesa ngwa anya dị iche iche. Site na nhazi na imewe netwọk ezi uche dị na ya, enwere ike ịchekwa akụ fiber ruo oke. Ọ bụ ezigbo ngwọta maka nsogbu nchịkọta ihe oyiyi na mgbasa.
Ụkpụrụ Teknụzụ EPON
EPON (Ethernet Passive Optical Network) Netwọk anya na-agafe agafe nke Ethernet bụ ngwaahịa nke ngwakọta zuru oke nke teknụzụ Ethernet na teknụzụ PON.
Iji kewaa akara na nnyefe na nnabata nke ọtụtụ ndị ọrụ n'otu eriri ahụ, a na-anabata teknụzụ multiplexing abụọ a: iyi data downlink na-anabata teknụzụ mgbasa ozi, na iyi data uplink na-anabata teknụzụ TDMA.
Ngwa EPON na igwefoto na onyunyo
A na-eji teknụzụ EPON mara oke bandwidth, nkwụsi ike dị elu na iji akụrụngwa ahịrị dị elu. Nke a na nkà na ụzụ nwere ya eke uru maka campus nlekota oru. Nke mbụ, campus nlekota oru na-achọ a elu-ọsọ, elu-edu onwe netwọk gburugburu ebe obibi na-ebu ya elu-edu video ọrụ.EPON technology na-enye uplink na downlink symmetric 1Gbps bandwit, nke nwere ike zuru ezu izute ndị. mkpa nke ọrụ vidiyo. Nke abụọ, EPON na-agbanwe agbanwe topological Ọdịdị kachasị na-elekọta nhazi nke gbasasịa nke ogige ahụ. nke EPON na-ebulikwa ọkwa teknụzụ ịnweta ohere nke nlekota ogige ruo ọkwa ọhụrụ.
Mgbe achọrọ nleba anya njupụta dị elu n'etiti ogige ahụ, EPON nwere ike ịmalite ịkparịta ụka n'Ịntanet. Otu ọdụ ụgbọ mmiri PONOLTejikọrọ akụrụngwa na 1: N spectrometer. Mgbe iru n'ihu-ọgwụgwụ ngwa anya, otutuONUejikọrọ ngwaọrụ. Were ohere zuru oke nke ogologo nnyefe eriri anya, na-agbatị na mkpa ọ bụla a ga-etinye na mpaghara ahụ. Enwere ike idobe eriri ahụ maka ohere mgbasawanye ọzọ.
Enwere ike ime nlekota nke okporo ụzọ ndị gbara ya gburugburu n'ụzọ zigzzagging iji jikọọ isi ihe nleba anya n'okporo ụzọ na usoro. Na obere mpaghara mpaghara, EPON nwere ogologo 20KM dị irè nwere ike inye ohere. N'ebe buru ibu, enwere ike iji ọtụtụ ụzọ dozie nsogbu dị anya.