Njengoba amalungu amabili ayinhloko okufinyelela kwenethiwekhi yokubona, i-EPON ne-GPON ngayinye inokufaneleka kwayo, iyaqhudelana, iyaphelelisana, futhi ifunda komunye nomunye.Okulandelayo kuzoziqhathanisa ezicini ezihlukahlukene.
Linganisa
I-EPON inikeza i-uplink engaguquki kanye ne-downlink engu-1.25 Gbps, yamukela umugqa wekhodi ongu-8b/10b, futhi izinga langempela ngu-1Gbps.
I-GPON isekela amazinga esilinganiso ahlukahlukene, angakwazi ukusekela amazinga asymmetric uplink and downlink, 2.5Gbps noma 1.25Gbps for downlink, kanye 1.25Gbps noma 622Mbps for uplink.Izinga le-uplink ne-downlink linqunywa ngokuvumelana nezidingo zangempela, futhi amamojula ahambisanayo optical akhethiwe ukuze kukhuliswe isilinganiso senani lesilinganiso samadivayisi okubona.
Isilinganiso sokuhlukaniswa
Isilinganiso sokuhlukaniswa ukuthi mangaki ama-ONU (amatheminali abasebenzisi) athwalwa yimbobo ye-OLT (ihhovisi elimaphakathi).
Izinga le-EPON lichaza isilinganiso sokuhlukaniswa esingu-1:32.
Izinga le-GPON lichaza izilinganiso zokuhlukaniswa ezilandelayo: 1:32;1:64;1:128.
Eqinisweni, ngobuchwepheshe amasistimu e-EPON angaphinda athole izilinganiso eziphakeme zokuhlukaniswa, ezifana no-1:64, 1:128, kanye nephrothokholi yokulawula ye-EPON ingasekela ama-ONU amaningi.Isilinganiso sokuhlukaniswa sinqunyelwe ikakhulukazi inkomba yokusebenza yemojuli ye-optical, futhi isilinganiso esikhulu sokuhlukaniswa sizobangela ukuthi izindleko zemojula ye-optical zikhuphuke kakhulu.
I-GPON inikeza izinketho eziningi, kodwa inzuzo yezindleko ayibonakali.Ubukhulu bebanga lokudlulisela Ibanga eliphezulu ngokomzimba elingasekelwa uhlelo lwe-GPON.Uma isilinganiso sokuhlukaniswa kwe-optical singu-1:16, kufanele sisekele ibanga lomzimba eliphakeme elingu-20km;lapho isilinganiso sokuhlukaniswa kwe-optical singu-1:32, kufanele sisekele ibanga lomzimba eliphakeme elingu-10km.I-EPON iyafana nale, kodwa iyalingana ngokujwayelekile.
Sikhwalithi yesevisi
Iphrothokholi ye-Ethernet ngokwayo ayinalo ikhono lokuphatha i-QoS.Ngakho-ke, ukuze i-EPON ikwazi ukusiza abasebenzisi, kuhlongozwa umqondo wenethiwekhi yendawo yendawo.I-VLAN iphakamisa ukuthi ukuhlonza okubalulekile kozimele abatholiwe kungashintshwa ukuze kubekwe isisekelo se-QOS, kodwa ngenxa yokuthi i-VLAN isetshenziswa mathupha, okuyinto ebiza kakhulu.Futhi i-GPON inamakhono ayo wesevisi we-QoS amahle kakhulu.
Ukuqhathaniswa kwesendlalelo sesixhumanisi se-EPON ne-GPON
Uma iqhathaniswa ne-GPON, i-EPON ilula futhi iqonde kakhulu.Ngokudlulisa okuhlanzekile kwe-Ethernet, izindlela ezimbili ze-encapsulation kanye nokusekelwa kwe-ATM ye-GPON ngeke kudlale indima enkulu.
Nokho, ezinsizeni zokufinyelela zenethiwekhi, i-EPON ifaneleka kuphela ezinsizeni zokudlulisa idatha, kuyilapho i-GPON ingahlinzeka ngamasevisi amathathu kokukodwa.
I-EPON iyisixazululo se-Ethernet yonke esivumelana ngokugcwele nezici, ukusebenza nokusebenza kwephrothokholi ye-Ethernet, kuyilapho i-GPON isebenzisa inethiwekhi ye-synchronous optical/i-synchronous digital system technology kanye nephrothokholi yokufaka ejwayelekile yokudluliselwa kwe-Ethernet.
I-EPON ne-GPON zinezinzuzo zazo kanye nokubi.Mayelana nezinkomba zokusebenza, i-GPON iphakeme kune-EPON, kodwa i-EPON inezinzuzo ngesikhathi nezindleko.I-GPON iyabamba.Uma sibheke phambili emakethe yokufinyelela ebanzi ye-broadband yesikhathi esizayo, kungase kungabi ukuthi ubani othatha indawo yabanye, kodwa uhlala ndawonye futhi uyaphelelisana.Kumakhasimende ane-bandwidth ephezulu, isevisi eminingi, i-QoS nezidingo zokuphepha, kanye nobuchwepheshe be-ATM njengenethiwekhi yomgogodla, i-GPON izoba ezifaneleka kakhulu.Emaqenjini amakhasimende azwela izindleko anezimfuneko eziphansi ze-QoS nezokuphepha, i-EPON isiyiyona ehamba phambili.