Monga mamembala awiri akuluakulu a optical network access, EPON ndi GPON aliyense ali ndi zoyenera zawo, amapikisana wina ndi mzake, amathandizana, ndi kuphunzira kuchokera kwa wina ndi mzake. Zotsatirazi zidzawafananiza m'mbali zosiyanasiyana.
Mtengo
EPON imapereka uplink yokhazikika ndi downlink 1.25 Gbps, kutenga 8b/10b mzere wa coding, ndipo mtengo wake ndi 1Gbps.
GPON imathandizira milingo yosiyanasiyana, yomwe imatha kuthandizira ma asymmetric uplink ndi downlink mitengo, 2.5Gbps kapena 1.25Gbps ya downlink, ndi 1.25Gbps kapena 622Mbps ya uplink. Mitengo ya uplink ndi downlink imatsimikiziridwa molingana ndi zosowa zenizeni, ndipo ma modules optical ogwirizana amasankhidwa kuti awonjezere chiwerengero cha mtengo wamtengo wapatali wa zipangizo zamakono.
Chigawo chogawanika
Chiŵerengero chogawanika ndi angatiONU(malo ogwiritsira ntchito) amanyamulidwa ndi aOLTdoko (ofesi yapakati).
Muyezo wa EPON umatanthawuza kugawanika kwa 1:32.
Muyezo wa GPON umatanthawuza zotsatirazi zogawanika: 1:32; 1:64; 1:128.
M'malo mwake, mwaukadaulo makina a EPON amathanso kukhala ndi magawo apamwamba kwambiri, monga 1:64, 1:128, ndipo EPON control protocol imatha kuthandizira zambiri.ONU. Chiŵerengero chogawanika chimakhala chochepa kwambiri ndi ndondomeko ya ntchito ya optical module, ndipo chiwerengero chachikulu chogawanika chidzachititsa kuti mtengo wa optical module ukwere kwambiri.
GPON imapereka njira zingapo, koma phindu lamtengo wapatali silikuwonekera. Mtunda wochuluka wotumizira Kutali kwambiri komwe dongosolo la GPON lingathandizire. Pamene kuwala kugawanika chiŵerengero ndi 1:16, ayenera kuthandizira pazipita thupi mtunda wa 20km; pamene chiŵerengero chogawanika cha kuwala ndi 1:32, chiyenera kuthandizira kutalika kwa thupi kwa 10km. EPON ndi yofanana ndi iyi, koma ndi yofanana.
Skhalidwe la utumiki
The Ethernet protocol palokha ilibe mphamvu yogwira QoS. Chifukwa chake, kuti EPON ithandizire ogwiritsa ntchito, lingaliro la netiweki yadera lapafupi likuperekedwa. VLAN ikuganiza kuti chizindikiritso choyambirira cha mafelemu omwe adalandira chikhoza kusinthidwa kuti chikhazikitse maziko a QOS, koma chifukwa VLAN imayendetsedwa pamanja, zomwe ndizokwera mtengo kwambiri. Ndipo GPON ili ndi luso lake labwino kwambiri lautumiki wa QoS.
EPON ndi GPON ulalo wosanjikiza kuyerekeza
Poyerekeza ndi GPON, EPON ndi yosavuta komanso yachindunji. Mu kutumiza koyera kwa Efaneti, njira ziwiri za encapsulation ndi chithandizo cha ATM cha GPON sichidzagwira ntchito yaikulu.
Komabe, mu mautumiki ochezera a pa Intaneti, EPON ndi yoyenera pa ntchito zotumizira deta, pamene GPON ikhoza kupereka ntchito zitatu-imodzi.
EPON ndi njira yonse ya Efaneti yomwe imagwirizana bwino ndi mawonekedwe, machitidwe ndi machitidwe a Ethernet protocol, pamene GPON imagwiritsa ntchito synchronous optical network / synchronous digital system technology ndi general framing protocol for transmission Ethernet.
EPON ndi GPON ali ndi zabwino ndi zovuta zawo. Ponena za zizindikiro zogwirira ntchito, GPON ndi yapamwamba kuposa EPON, koma EPON ili ndi ubwino pa nthawi ndi mtengo. GPON ikugwira ntchito. Kuyembekezera msika wamtsogolo wamsika wofikira burodi, sizingakhale zomwe zimalowa m'malo mwa ena, koma zimakhalira limodzi ndikuthandizirana wina ndi mnzake.Kwa makasitomala omwe ali ndi bandwidth yapamwamba, mautumiki ambiri, QoS ndi zofunikira zachitetezo, ndiukadaulo wa ATM monga maukonde a msana, GPON idzakhala zoyenera kwambiri. Kwa magulu amakasitomala otsika mtengo omwe ali ndi QoS yotsika komanso zofunikira zachitetezo, EPON yakhala yayikulu.