Sezvo nhengo mbiri huru dzekuwana network yekuona, EPON neGPON imwe neimwe ine kwayo kwayo, kukwikwidzana, kuzadzisana, uye kudzidza kubva kune mumwe nemumwe. Zvinotevera zvichavaenzanisa muzvinhu zvakasiyana-siyana.
Rate
EPON inopa yakagadziriswa uplink uye downlink 1.25 Gbps, inotora 8b/10b mutsara wekukodha, uye chiyero chaicho i1Gbps.
GPON inotsigira zvakasiyana-siyana zvemazinga, izvo zvinogona kutsigira asymmetric uplink uye downlink rates, 2.5Gbps kana 1.25Gbps yedownlink, uye 1.25Gbps kana 622Mbps yeuplink. Iyo uplink uye downlink mazinga anotarirwa maererano nezvinodiwa chaizvo, uye anowirirana optical modules anosarudzwa kuti awedzere chiyero-yemutengo weiyo optical zvishandiso.
Split ratio
The split reshiyo inganiONUs(mushandisi zviteshi) zvinotakurwa neOLTport (central office).
Iyo EPON chiyero inotsanangura chikamu chekupatsanura che1:32.
Chiyero cheGPON chinotsanangudza mareshiyo anotevera: 1:32; 1:64; 1:128.
Sezvineiwo, tekinoroji EPON masisitimu anogona zvakare kuwana yakakwira kupatsanura zviyero, senge 1:64, 1:128, uye EPON control protocol inogona kutsigira zvimwe.ONUs. Chiyero chekupatsanurwa chinonyanya kuganhurirwa neiyo performance index ye optical module, uye yakakura kupatsanurwa reshiyo ichaita kuti mutengo weiyo optical module ukwire zvakanyanya.
GPON inopa akawanda sarudzo, asi mutengo wakanakira hausi pachena. Maximum transmission distance Iyo yakanyanya kureba nhambwe inogona kutsigira GPON system. Kana iyo optical splitting reshiyo iri 1:16, inofanirwa kutsigira kureba kwemuviri kwe20km; kana reshiyo yekupatsanurwa kwemaziso iri 1:32, inofanirwa kutsigira kureba kwemuviri kwe10km. EPON yakafanana neiyi, asi yakaenzana mune zvese.
Sservice quality
Iyo Ethernet protocol pachayo haina kugona kubata QoS. Naizvozvo, kuitira kuti EPON ikwanise kubatsira vashandisi, pfungwa yenzvimbo yenharaunda network inokurudzirwa. VLAN inokurudzira kuti kutariswa kwekutanga kwemafuremu akagamuchirwa kunogona kugadziridzwa kuisa hwaro hweQOS, asi nekuti VLAN inoshandiswa nemaoko, inodhura zvakanyanya. Uye GPON ine yayo yakanakisa QoS sevhisi kugona.
EPON uye GPON yekubatanidza layer kuenzanisa
Kana ichienzaniswa neGPON, EPON iri nyore uye yakananga. Mune yakachena Ethernet kutapurirana, nzira mbiri dzekuisa encapsulation uye ATM tsigiro yeGPON haizoite basa rakakura.
Nekudaro, mukuwana masevhisi etiweki, EPON inokodzera chete masevhisi ekufambisa data, nepo GPON inogona kupa matatu-mu-imwe masevhisi.
EPON inogadzirisa zvese-Ethernet zvinonyatsoenderana nehunhu, kuita uye kuita kweEthernet protocol, nepo GPON inoshandisa synchronous optical network/synchronous digital system tekinoroji uye general framing protocol yeEthernet kutapurirana.
EPON neGPON vane zvazvakanakira nezvazvakaipira. Panyaya yezviratidzo zvekushanda, GPON inopfuura EPON, asi EPON ine zvakanakira munguva uye mutengo. GPON iri kubata. Tichitarisira kumusika weramangwana weBroadband access, inogona kunge isiri iyo inotsiva vamwe, asi inogarisana uye inozadzisa mumwe nemumwe.Kune vatengi vane bandwidth yakakwira, yakawanda-sevhisi, QoS uye kuchengetedza zvinodiwa, uye ATM tekinoroji seyo backbone network, GPON ichave. zvakanyanya kufanira. Kumapoka evatengi asingadhure ane QoS yakaderera uye zvinodiwa zvekuchengetedza, EPON ndiyo yave kutonga.