Ngokuphuculwa okuqhubekayo kokwakhiwa kwenethiwekhi ye-high-speed kunye nesidingo sokwakha ubomi obuhlakaniphile bedijithali ngokusekelwe kwizakhono zenethiwekhi "yegigabit ezintathu", abaqhubi bafuna imigama emide yokuhambisa, i-bandwidths ephezulu, ukuthembeka okunamandla kunye neendleko eziphantsi zokusebenza kwezoshishino (OPEX), kunye I-GPON ixhasa imisebenzi emininzi ukuhlangabezana neemfuno zabathengi.
Yintoni i-GPON?
I-GPON sisishunqulelo se-Gigabit Passive Optical Network, echazwe yi-ITU-T yeengcebiso ze-G.984.1 ukuya kwi-G.984.6.I-GPON ayikwazi ukuhambisa i-Ethernet kuphela, kodwa kunye ne-ATM kunye ne-TDM (PSTN, ISDN, E1 kunye ne-E3) traffic.Isici sayo esiphambili kukusetyenziswa kwe-passive splitters kwinethiwekhi yokusabalalisa i-fiber optical, kunye ne-point-to-multipoint access mechanism, ukusebenzisa i-fiber optical engenayo enye evela kwindawo ephakathi yomboneleli womnatha ukukhonza amakhaya amaninzi kunye nabasebenzisi bamashishini amancinci.
I-GPON, i-EPON kunye ne-BPON
I-EPON (i-Ethernet Passive Optical Network) kunye ne-GPON zineentsingiselo ezifanayo kakhulu.Zizo zombini iinethiwekhi ze-PON kwaye zombini zisebenzisa iintambo ze-optical kunye ne-frequency optical frequency.Ireyithi yala manethiwekhi amabini kwicala elinyukayo malunga ne-1.25 Gbits / s.Kwaye i-BPON (i-Broadband Passive Optical Network) kunye ne-GPON nazo zifana kakhulu.Bobabini basebenzisa iifayili ze-optical kwaye banokubonelela ngeenkonzo kubasebenzisi be-16 kubasebenzisi be-32.Inkcazo ye-BPON ilandela i-ITU-T G983.1, kwaye i-GPON ilandela i-ITU-T G984.1.Xa izicelo zePON zaqala ukuqaliswa, i-BPON yayiyeyona idumileyo.
I-GPON idume kakhulu kwimarike yefiber optical.Ukongeza kwitekhnoloji ephezulu, ikwanezinto eziluncedo zilandelayo:
I-1.Uluhlu: I-fiber yemodi enye inokudlulisa idatha ukusuka kwi-10 ukuya kwiikhilomitha ze-20, ngelixa iintambo zobhedu eziqhelekileyo zihlala zilinganiselwe kuluhlu lweemitha ezili-100.
I-2.Speed: Izinga lokuhanjiswa kwe-EPON ezantsi lifana nesantya salo esinyukayo, esiyi-1.25 Gbit / s, ngelixa izinga lokuhambisa elisezantsi kwe-GPON yi-2.48 Gbit / s.
I-3.Ukhuseleko: Ngenxa yokuhlukaniswa kwezibonakaliso kwi-fiber optical, i-GPON iyinkqubo ekhuselekileyo.Ngenxa yokuba zithunyelwa kwisekethe evaliweyo kwaye ziqulethe ufihlo, iGPON ayinakugqekezwa okanye icofe.
I-4.Ukufikeleleka: Iintambo ze-GPON ze-fiber optic zixabiso eliphantsi kuneentambo ze-LAN zethusi, kwaye zinokuphepha utyalo-mali kwii-wiring kunye nezixhobo ze-elektroniki ezinxulumene nazo, ngaloo ndlela zigcina iindleko.
I-5.Ukugcinwa kwamandla: Ngokuchasene nocingo oluqhelekileyo lobhedu kwiinethiwekhi ezininzi, ukusebenza kakuhle kwamandla kwe-GPON kwanda nge-95%.Ukongeza ekusebenzeni kakuhle, i-gigabit passive optical networks ikwabonelela ngesisombululo esinexabiso eliphantsi elinokwandisa abasebenzisi ngokusebenzisa i-splitters, ethandwa kakhulu kwiindawo ezinabantu abaninzi.