Re:The future is in symmetrical, high-speed internet speeds
by kornholi on Sunday July 04, 2021 @08:10PM
(#27733645)
Although GPON is shared, it is not half duplex! I'm not exactly sure why the asymmetrical version won out, perhaps due to cheaper optics back in the day?
Latest iterations (NG-PON2 and XGS-PON) are 10G symmetrical, and XGS-PON is now cheap enough that GPON doesn't make much sense. AT&T Fiber in the US has been deploying it for the last few years.
Re:The future is in symmetrical, high-speed internet speeds
by zajio1am on Monday July 05, 2021 @11:15AM
(#27738807)
> Although GPON is shared, it is not half duplex!
Seems like you are right! Although most are asymmetric (2488 / 1244 Mbps). I guess that even for ones with symmetric bitrates, effective upstream transfer rate would be lower than downstream transfer rate due to synchronization / higher inter-frame period needs.
Re:The future is in symmetrical, high-speed internet speeds
by MrRadar on Sunday July 04, 2021 @10:38PM
(#27734215)
I just signed up for fiber internet service at my new house and it's 940/940 symmetric. I'm 99% sure the service is some form of GPON so I don't think there's any inherent limitation that you can't have symmetric GPON.
Re:The future is in symmetrical, high-speed internet speeds
by topranks on Monday July 05, 2021 @07:42AM
(#27736906)
Heh that's interesting. I speculated about just such a possibility earlier in the thread - interesting to see someone doing it.
What access technology is being used by that provider that you can change the up/down allocation?
Here, a provider i use offers variable tarrifs, that allow adjusting download/upload ratio dynamically in web interface (e.g. tarif '250' could be switched between 250/80 Mbps, 150/150 Mbps, or 80/250 Mbps).