Ukusetyenziswa kweTekhnoloji ye-EPON kwi-FTTx Network Access

I-EPON-based FTTx iteknoloji ineenzuzo ze-bandwidth ephezulu, ukuthembeka okuphezulu, iindleko zokugcinwa okuphantsi, kunye neteknoloji evuthiweyo.Okwesibini, ingenisa imodeli yesicelo esiqhelekileyo se-EPON kwi-FTTx, kwaye emva koko ihlalutya iinkalo eziphambili zeteknoloji ye-EPON kwisicelo kwaye ihlalutya i-EPON.Iingenelo zicazululwa.Imiba emithathu engundoqo yeOLTukubekwa kwenethiwekhi yezixhobo, imowudi yothungelwano lwenkonzo yezwi, kunye nolwakhiwo lolawulo lwenethiwekhi oluhlanganisiweyo kwi-EPON-based FTTx network access ihlalutywa.

1, Uhlalutyo lwemeko yesicelo seEPON

Itekhnoloji ye-EPON okwangoku ingundoqo ekuphunyezweni kwe-broadband optical access kunye ne-FTTx.Ukuqwalasela iimpawu zeteknoloji ye-EPON, ukukhula, iindleko zotyalo-mali, iimfuno zoshishino, ukhuphiswano lweemarike kunye nezinye izinto, izicelo eziphambili zeteknoloji ye-EPON zinokwahlulwa zibe zezi ntlobo zilandelayo:

I-FTTH (i-Fiber ukuya kwiKhaya), i-FTTD (iFiber kwi-Desktop), i-FTTB (i-Fiber kwiSakhiwo), i-FTTN / V, njl. Iimodi ezine zibonakaliswa ngokuyinhloko kumahluko kwindawo yokuphela kwentambo ye-optical, Ubude bokufikelela kwintambo yobhedu, kunye noluhlu lwabasebenzisi abagqunywe ngendawo enye, Gqiba indawo yokufikelela kwindawo yefiber kunyeI-ONUkwi-X kwiFTTx.Ngokusetyenziswa kwee-FTTx ezahlukeneyo ukuphumeza i-fiber optical, eyona njongo ye-FTTH yokukhuthaza i-fiber optical ekhaya, i-FTTB / FTTN yindlela yokuthunyelwa kwezoqoqosho kule nqanaba.

I-EPON ithatha i-Ethernet njenge-carrier, ithatha indawo kwi-multipoint structure kunye ne-passive optical fiber transmission mode.Izinga le-downlink lingafikelela kwi-10Gbit / s okwangoku, kwaye i-uplink ithumela umlambo wedatha ngendlela yeepakethi ze-Ethernet eziqhumayo.Okwangoku, i-EPON Technology isetyenziswe ngokubanzi kuzo zonke iintlobo ze "optical in copper out" indlela yokwakha yabaqhubi.Ukususela kumbono wexesha elide le-FTTx ye-network evolution, ukubonakala kwe-10G EPON Technology ikwabonelela ngesisombululo esingcono kubasebenzisi be-FTTx yenethiwekhi yokuphucula kakuhle.

I-FTTx isebenzisa i-fiber optical njengendlela yokudlulisa, enenzuzo yomthamo omkhulu wothumelo, umgangatho ophezulu, ukuthembeka okuphezulu, umgama omde wokuhambisa, kunye nokuphazamiseka kwe-anti-electromagnetic.Lukhokelo lophuhliso lokufikelela kwibroadband.

(1) indlela ye-FTTH

I-FTTH, okanye indlela ye-fiber-to-home-home, ifanelekile kwiindawo apho abasebenzisi bahlala khona ngokwentelekiso, njengee-villas, apho abasebenzisi baneemfuno eziphezulu ze-bandwidth, kwaye abaphuhlisi babandakanyeka ngokusebenzayo kulwakhiwo lwenethiwekhi.FTTH iyaqonda "konke ukufikelela kwi-optical access," akukho bhedu kuyo yonke le nkqubo”.Indawo enye ihambelana nomsebenzisi omnye.Umsebenzisi ufumana eyona bandwidth inamandla kunye nobuchule beshishini, kodwa iindleko zokwakha nazo ziphezulu.

(2) indlela yeFTTD

Indlela yeFTTD ifanelekile kwiimeko apho izakhiwo zeofisi eziphezulu kunye nabanye abasebenzisi zigxininiswe kwaye zifuna i-bandwidth ephezulu, kwaye ifanelekile kwiimeko apho iinkonzo ze-bandwidth eziphezulu ezifana ne-IPTV ziphuhliswa kwiindawo zokuhlala ezixineneyo.Indlela yothungelwano ngokubanzi kukutsala intambo yokukhanya kwi-OLT kwiofisi esembindini ukuya kwisakhiwo, ubeke i-optical splitter kwigumbi lokunikezela okanye kwipaseji yesakhiwo, kwaye uyiqhagamshele kwi-desktop yomsebenzisi ngentambo ye-optical yesakhiwo okanye ukulahla. I-cable.Kule meko, kuyimfuneko ukukhetha ukuba ubeke i-splitter ye-optical kwi-corridor okanye kwigumbi lokunikezelwa kwesakhiwo ngokobunzulu babasebenzisi.Ngexesha elifanayo, ukuqwalasela ukulungelelaniswa kofakelo, iteknoloji yokudibanisa okubandayo kufuneka isetyenziswe kangangoko kunokwenzeka xa ufakaI-ONUkwicala lomsebenzisi.

(3) indlela yeFTTB

Indlela ye-FTTB ifanelekile kwiimeko apho inani elihambelanayo labasebenzisi kwisakhiwo seshishini elilodwa lincinci kwaye iimfuno ze-bandwidth aziphezulu.I-FTTB iyaqonda "i-fiber kwisakhiwo, ubhedu alushiyi isakhiwo".Ngale node, iimfuno zoshishino zabo bonke abasebenzisi kwisakhiwo zigutyungelwe, kwaye i-bandwidth yokufikelela komsebenzisi kunye nobuchule boshishino buhlala buphezulu kakhulu, sisisombululo esiqhelekileyo kuluntu olusanda kwakhiwa;

(4) Indlela yeFTTN/V

I-FTTN/V ngokusisiseko “yifayibha eluntwini (kwilali), ubhedu alunakulushiya uluntu (ilali)”, umqhubi usasaza intambo yefiber optic kuluntu (elali), aze afakele inani elincinane okanye node kuphela kwiindawo zokuhlala. Igumbi lekhompyutha okanye ikhabhathi yangaphandle yoluntu (ilali) ,Ukuphumeza ukhuselo lweshishini kubasebenzisi kulo lonke uluntu (ilali), kunye nokufikelela kwi-bandwidth kunye nezakhono zoshishino zibuthathaka.Sisisombululo esisisiseko sokwakhiwa kwakhona kwedolophu kunye neendawo zasemaphandleni "i-optical copper retreat".

Iindlela ezahlukeneyo zenethiwekhi zichaphazela ngokuthe ngqo ukwakhiwa kwe-ODN kunye nezicwangciso zezinto ze-PON zenethiwekhi.Imowudi efanelekileyo yothungelwano kufuneka ikhethwe ngokweemfuno zokwenene.I-platform yenethiwekhi ye-FTTx ekwabelwana ngayo ngabathengi abahlukeneyo kunye neendlela ezahlukeneyo ze-FTTx ze-networking application modes zinokusekwa kwimimandla eyahlukeneyo.

2, Uhlalutyo lwengxaki ye-EPON kwisicelo

2.1 Amanqaku aphambili e-EPON kucwangciso lweprojekthi

I-EPON iqwalasela ubukhulu becala izinto ezi-4 kucwangciso lweprojekthi: isicwangciso senethiwekhi yentambo yokukhanya,OLTindawo yofakelo, indawo yofakelo lwe-optical splitter, kunye nodidi lwe-ONU.

Isicwangciso sokucwangciswa kwentambo ye-optical cable, indlela yokungena ekhaya, kunye nokukhethwa kwentambo ye-optical / fiber yimibandela ebaluleke kakhulu kwinkqubo yenethiwekhi ye-EPON, eya kuchaphazela ngokuthe ngqo utyalo-mali olupheleleyo, ukusetyenziswa kwentambo ye-optical, ukusetyenziswa kwezixhobo kunye nombhobho. ukusetyenziswa.Ukusetyenziswa kweteknoloji yePON ibeka iimfuno eziphezulu kwimowudi yangoku yenethiwekhi ye-optical cable networking, ngakumbi kwi-layout ye-user optical cables ngaphakathi kweseli.Ukuba intambo yefiber optic ibekwe ngokwahlukileyo kumsebenzisi ngamnye, inani elikhulu leentambo zefiber optic ziyafuneka kwiseli, eziya kudla isixa esikhulu semithombo yepayipi kwiseli, okukhokelela ekunyukeni kweendleko zomsebenzisi ngamnye.Ngoko ke, kuyimfuneko ukwenza umsebenzi omhle ekucwangcisweni komsebenzisi womnatha we-cable optical kwisigaba sokuqala sokwakha, kubandakanywa ne-backbone optical cable routing, inombolo engundoqo, njl., Ukuphepha ukuchithwa kwezibonelelo kangangoko kunokwenzeka.

Ukubekwa kwe-OLT kunye ne-splitter kuya kuchaphazela kakhulu ukuhlelwa kunye neendleko zotyalo-mali zenethiwekhi ye-optical cable.Ngokomzekelo, ukuthunyelwa kwe-OLT kwi-ofisi ephakathi kuya kuthatha inxalenye yentambo ye-backbone optical cable, kwaye ukuthunyelwa kuluntu kuthintelwe ngezixhobo zegumbi leofisi kunye neendleko ezixhasayo. ofisi.Xa ukhetha indawo yesixhobo ngasinye, ukuhanjiswa kwabasebenzisi kwiseli kunye neemfuno ze-bandwidth zabasebenzisi abahlukeneyo kufuneka ziqwalaselwe ngexesha elinye, kwaye iqela labasebenzisi elixineneyo kunye neqela labasebenzisi abahlakazekileyo kufuneka baphathwe ngokwahlukileyo.

Uhlobo lwe-ONU kufuneka lukhethwe ngokubambisana ne-cable layout kwindawo yokufikelela.Ii-ONU zibandakanya ikakhulu iPOS+DSL kunye nePOS+LAN.Ngokomzekelo, xa i-wiring yesakhiwo kuluntu inesibini esijijekileyo kuphela, i-ONU iya kusebenzisa i-POS + DSL, i-Voice Access ngokusebenzisa i-softswitch, ukufikelela kwe-broadband nge-ADSL/VDSL;xa kusakha iingcingo eluntwini kwamkela udidi lwesi-5,I-ONUiya kusebenzisa izixhobo ze-POS + LAN, kunye nezakhiwo zeofisi, iiyunithi, kunye neepaki ezinocingo oludibeneyo, ii-ONU ziya kusebenzisa Izixhobo ezine-interface ye-LAN.

Kuyilo lobunjineli, ixabiso eliphezulu lokunciphisa kwi-ODN kufuneka lilawulwe, kwaye kucetyiswa ukuba lilawule ngaphakathi kwe-26dB.

2.2 Iimpawu zeEPON kuthungelwano lweFTTX

Xa kuthelekiswa nofikelelo lwetekhnoloji yemveli, iteknoloji ekhulayo yeFTTx esekwe kwiEPON inala mancedo alandelayo:

(1) Itekhnoloji ilula, ixabiso liphantsi, kwaye iinkonzo ze-IP ziyakwazi ukuhanjiswa ngokufanelekileyo, ezihambelana nokuguquguquka kunye nokuhanjiswa ngokukhawuleza kweenkonzo.I-EPON ilula ukwenza.I-ODN isetyenziswe kwisakhiwo, kwaye ii-ONU zifakwe kwicala lomsebenzisi ukubonelela ngeenkonzo ezahlukeneyo.Ixesha lokwakha lifutshane kwaye ukuhanjiswa kwenkonzo kukulungele kwaye kuguquguquka.

(2) Kwinkqubo, akukho mfuneko yokuseta izixhobo zemveli ezisebenzayo phakathi kweofisi ephakathi kunye neendawo zabasebenzisi, ukugcina ukwakhiwa kwegumbi lekhompyutha.I-ODN sisixhobo sokwenziwa.Kulula ukufumana indawo yokwakhiwa kwe-ODN kwisakhiwo, esinciphisa iindleko zokwakha, ukuqeshisa kunye nokugcinwa kwegumbi lekhompyutha.

(3) Uthungelwano lunoqoqosho kwaye lugcina iindleko zokwakha inethiwekhi.Inethiwekhi ye-FTTx ithatha i-point-to-multipoint structure, egcina izibonelelo ezininzi ze-backbone fiber.I-fiber enesantya esiphezulu inokusebenzisa abasebenzisi abaninzi ngexesha elinye, eliphucula kakhulu imbuyekezo kutyalo-mali kulwakhiwo lwenethiwekhi.

(4) Kulula ukugcina nokulawula.Kukho i-EPON yolawulo lwenethiwekhi edibeneyo kwiofisi ephakathi, enokulawula i-ONU yomsebenzisi, ekulula ukuyilawula nokugcina kunemodem ye-HDSL okanye imodem ye-optical.

3, Isiphelo

Ngokufutshane, abaqhubi bajongene neendlela eziqatha zokhuphiswano.Kwintsimi yokufikelela kuthungelwano, kuphela xa abaqhubi bekhetha indlela yokufikelela echanekileyo banokuqinisekisa ngokupheleleyo umdla wabaqhubi kwaye bahlangabezane neemfuno zoshishino eziguqukayo.Inkqubo ye-EPON yiteknoloji entsha yokufikelela ejongene nekamva.Inkqubo ye-EPON yi-platform yeenkonzo ezininzi kwaye ilukhetho oluhle lokutshintshwa kwinethiwekhi ye-IP yonke.I-EPON inokubonelela ngesantya esiphezulu, esithembekileyo, iinkonzo ezininzi kunye nokulawulwa kokufikelela kwiinkonzo ngexabiso eliphantsi, elibonakalisa ngokupheleleyo kunye nesiqinisekiso sexabiso lokufikelela kubasebenzisi kunye nabaqhubi.