EPON TO GPON
EPON devices are more popular because it is easy to deploy and also less costs. In the current Scenario of our networks, EPON is enough and no need to change it to GPON.
EPON is based on Ethernet technology IEEE 802.3 ah. In EPON both downstream and upstream line rates are 1.25 Gbps Its splitting Ratio is 1:64. In PON side the Data like video, Data, voice are only transferring as ETHERNET packets.
GPON is based on ITU standards; ITU –t G.984. In GPON both downstream and upstream line rates are 2.5Gbps and 1.25Gbps respectively and its splitting Ratio is 1:128.GPON converting the Ethernet packets to GEM frames.
In GPON the QoS (Quality of Service) is more effective because of using GEM/ATM for Data encapsulation and it gives higher priority to higher value traffic such as VoIP, it allows smart transmission resources allocation. QoS (Quality of Service) very poor because Ethernet a higher bandwidth and efficiency in Ethernet transport are not sufficient to ensure high quality of voice and video and data delivery
GPON VS EPON
|Standard||ITU-T G.984||IEEE 802.3ah|
|Data rate||2.5/1.24 Gbps||1.25/125Gbps|
|DBA||Standard format||Defined by vendors|
|OAM||Powerfull||Weak ,extended by vendors|
|Application mode||Multi service /FTTx||Pure data Service|
In EPON all kind of service is forwarded as Ethernet packets in a single tunnel. So in high traffic situation can’t provide priority for preference services like VoIP and OTT
But GPON is separate tunneling solution and high preference services can provide first priority. That can assure the quality of services (QoS) in a pon network
As a conclusion, the device selection for a network depends on the type of services and amount of traffic. EPON is suitable for even high speed internet services. But GPON is suggesting for a network with high traffic value added service.