coinshen However, in the current implementation of operators, the split ratio is basically not directly 1:64 in the project, and the commonly used splitter is 1:32.
In Italy actually both FiberCop and OpenFiber are using 1:64 split ratios - there could be two-stage splitting (i.e. 4x16 or 8x8) - but OpenFiber in the BUL network which uses a 1:16 split ratio, because the tender required a minimum speed of 100Mbps.
Anyway, GPON trees are usually not filled fully with users.
coinshen means that the average bandwidth per user of EPON can only reach 16M.
It's not the "average" bandwidth but the minimum available bandwidth if the tree is full and every user is trying to use the network at the same time. In this case if the bandwidth allocation is fair, each user will get only (max PON speed)/(splitting factor) Mbps. PON works because not all users attempt to use the full bandwidth at the same time, so as long as traffic is in relatively short bursts it will see far higher speeds that can be closer to the maximum speed.
But as more and more users use long-running connections - i.e. video streaming - overloaded trees may start to show bandwidths issue at the GPON level. Still with a 1:64 split in a GPON network the minimum speed is about 40Mbps which is still usable even for 4K streaming.
Edit il post al quale ho risposto è stato cancellato.
