Namuhla, imboni yezokuxhumana yaseShayina ithuthuka ngokushesha, futhi amamojula we-fiber optic athuthukiswa ngokuqhubekayo futhi athuthukiswe.Ukuvela kwamamojula we-PON asebenza kahle kakhulu kuye kwashintsha kancane kancane imicu yendabuko esebenza kancane futhi isetshenziswa kabanzi.I-PON ihlukaniswe i-GPON ne-EPON.I-GPON ingasetshenziswa.Ithi iyinguqulo ethuthukisiwe ye-EPON.
Kungani ufuna ukuphakamisa i-GPON?
I-GPON inezinga eliphezulu le-Gigabit, ukusetshenziswa komkhawulokudonsa ongu-92% kanye nekhono lokusekela ukudluliswa okusobala kwezinsizakalo eziningi, kuyilapho iqinisekisa ikhwalithi yesevisi nezinga, ihlinzeka ngokuqapha kwenethiwekhi yenkampani yenethiwekhi nokuphathwa kwesevisi.
Uma kuqhathaniswa nokusetshenziswa komkhawulokudonsa, izindleko, ukwesekwa kwezinsizakalo eziningi, nemisebenzi ye-OAM, i-GPON ingcono kune-EPON:
1.Ukusetshenziswa komkhawulokudonsa: Ngakolunye uhlangothi, i-EPON isebenzisa umbhalo wekhodi ongu-8B/10B, wona owethula ukulahlekelwa okungu-20%.Izinga lokudlulisela elingu-1.25 Gbit/s empeleni lingu-1 Gbit/s kuphela ngaphambi kwephrothokholi yokucubungula.
2.Izindleko: Mayelana nezindleko zebhithi elilodwa, izindleko ze-GPON ziphansi kunalezo ze-EPON.
3.Ukusekelwa kwezinsizakalo eziningi: Ukudluliselwa kwe-EPON kwezinsizakalo ze-TDM zendabuko kuthambekele ezinkingeni ze-QoS.Ifomu lephakheji eliyingqayizivele le-GPON liyenza ikwazi ukusekela izinsizakalo ze-ATM kanye nezinsizakalo ze-IP, ukuze kuzuzwe isevisi yeqiniso egcwele.
Umsebenzi we-4.OAM: I-EPON ilawula kuphela imisebenzi eyisisekelo njengenkomba yephutha elikude, isilawuli se-loopback esikude, nokuqapha kwesixhumanisi, kuyilapho eminye imisebenzi ethuthukisiwe ye-OAM ikhushulwa ngokuzimele ngumkhiqizi kudivayisi.Imisebenzi ye-GPON OAM ihlanganisa ukunikezwa kwesibonelelo somkhawulokudonsa, ukwabiwa komkhawulokudonsa oshukumisayo (DBA), ukuqapha isixhumanisi, ukushintsha kokuvikela, ukushintshanisa ukhiye, nemisebenzi ehlukahlukene ye-alamu.Ngokombono ojwayelekile, ulwazi lwe-GPON OAM luningi kune-EPON.
Yiziphi izindlela ezimbili zokudlulisela ze-GPON:
Enye imodi ye-ATM kanti enye imodi yephakheji ye-GPON (GEM).Enqubweni yokudlulisa, i-GPON ingasebenzisa imodi ye-ATM noma imodi ye-GEM, noma zombili izindlela zingasetshenziswa ndawonye.Iyiphi imodi ongayisebenzisa, khetha uma i-GPON iqaliswa.I-Optical fiber inezinzuzo zokulahlekelwa okuphansi nokonga izinsiza.Uma kucatshangelwa izicelo eziningi ze-broadband esikhathini esizayo, amazwe amaningi asebenzisa i-optical fiber njengendlela yokudlulisela.