E like me nā lālā nui ʻelua o ka ʻike pūnaewele optical, EPON a me GPON kēlā me kēia me ko lākou pono ponoʻī, hoʻokūkū kekahi i kekahi, hoʻokō kekahi i kekahi, a aʻo mai kekahi i kekahi.E hoohalikeia lakou ma na ano like ole.
Laki
Hāʻawi ʻo EPON i ka uplink paʻa a me ka downlink 1.25 Gbps, hoʻohana i ka laina laina 8b/10b, a ʻo ka helu maoli ʻo 1Gbps.
Kākoʻo ʻo GPON i nā pae helu like ʻole, hiki ke kākoʻo i ka asymmetric uplink a me downlink rate, 2.5Gbps a i ʻole 1.25Gbps no downlink, a me 1.25Gbps a i ʻole 622Mbps no ka uplink.Hoʻoholo ʻia nā uku uplink a me downlink e like me nā pono maoli, a ua koho ʻia nā modula optical e pili ana e hoʻonui i ka ratio rate-price o nā mea optical.
Lakiō māhele
ʻO ka lakio hoʻokaʻawale ka nui o nā ONU (nā mea hoʻohana hope) e lawe ʻia e kahi awa OLT (keena kikowaena).
Hōʻike ka maʻamau EPON i ka māhele māhele o 1:32.
ʻO ka maʻamau GPON ka wehewehe ʻana i kēia mau māhele māhele: 1:32;1:64;1:128.
ʻO ka ʻoiaʻiʻo, hiki i nā ʻōnaehana ʻenehana EPON ke hoʻokō i nā lakio māhele kiʻekiʻe, e like me 1:64, 1:128, a hiki i ka protocol control EPON ke kākoʻo i nā ONU hou aʻe.Hoʻopili nui ʻia ka lakio hoʻokaʻawale e ka papa kuhikuhi hana o ka module optical, a ʻo ka ratio māhele nui e piʻi nui ke kumukūʻai o ka module optical.
Hāʻawi ʻo GPON i nā koho he nui, akā ʻaʻole maopopo ke kumukūʻai.Ka mamao hoʻouna kiʻekiʻe ʻO ka mamao kino kiʻekiʻe i hiki i ka ʻōnaehana GPON ke kākoʻo.I ka 1:16 ka lakene opua, pono e kākoʻo i ka mamao kino o 20km;inā he 1:32 ka lākiō hoʻokaʻawale optical, pono ia e kākoʻo i ka mamao kino o 10km.Ua like ka EPON me kēia, akā ua like ia ma ka laulā.
Smaikaʻi lawelawe
ʻAʻole hiki i ka protocol Ethernet ponoʻī ke mālama i ka QoS.No laila, i mea e hiki ai iā EPON ke lawelawe i nā mea hoʻohana, ua manaʻo ʻia kahi manaʻo o ka ʻoihana kikowaena kūloko.Manaʻo ʻo VLAN e hiki ke hoʻololi ʻia ka ʻike mua o nā papa i loaʻa e hoʻokumu i ke kumu no QOS, akā no ka hoʻokō ʻia ʻana o VLAN me ka lima, he kumu kūʻai loa ia.A loaʻa iā GPON kāna mau mana lawelawe QoS maikaʻi loa.
EPON a me GPON hoʻohālikelike papa loulou
Hoʻohālikelike ʻia me GPON, ʻoi aku ka maʻalahi o ka EPON a pololei.Ma ka hoʻoili Ethernet maʻemaʻe, ʻaʻole e pāʻani nui nā ʻano encapsulation ʻelua a me ke kākoʻo ATM o GPON.
Eia nō naʻe, i nā lawelawe pūnaewele ʻike, kūpono wale ʻo EPON no nā lawelawe hoʻoili ʻikepili, ʻoiai hiki iā GPON ke hāʻawi i nā lawelawe ʻekolu-i-hoʻokahi.
ʻO EPON kahi hopena Ethernet āpau e hoʻokō pono i nā hiʻohiʻona, ka hana a me ka hana o ka protocol Ethernet, ʻoiai ʻo GPON e hoʻohana ana i ka synchronous optical network/synchronous digital system technology a me ka protocol framing general no ka hoʻouna ʻana iā Ethernet.
Loaʻa iā EPON a me GPON kā lākou mau pono a me nā hemahema.Ma ke ʻano o nā hōʻailona hana, ʻoi aku ka maikaʻi o GPON ma mua o EPON, akā loaʻa ka EPON i nā pono i ka manawa a me ke kumukūʻai.Ke hopu nei ʻo GPON.Ke nānā nei i mua i ka wā e hiki mai broadband komo makeke, ka mea, 'aʻole paha ka mea i pani i kekahi, akā, coexists a complements kekahi i kekahi. ʻoi aku ke kūpono.No nā pūʻulu kūʻai koʻikoʻi koʻikoʻi me ka QoS haʻahaʻa a me nā koi palekana, ua lilo ʻo EPON i mea nui.