On 27/05/2011 00:12, Adam Armstrong wrote:
Findings from data from several European and American FTTB/FTTH networks :
I'm running 1GE links into buildings, and hanging many (100-1000) 100M
customers off switches in the basement, simple enough.
I'm assuming ~300Kbps average peak usage per customer, but I can't
quite work out at what point that number becomes more important than
the fact that each user can peak at 100mbit (and that the backhaul is
only access-speed * 10).
It turns out that 250-500Kbps is about the peak-average usage range
currently seen in these kinds of customers. Peak only seems to be 4-5 *
access speed. (at 5 min-intervals, of course!)
I'm well versed in the economies of scale of fitting 10,000 8mbit
customers into 1GE, but this seems altogether a different beast to
predict. If any of you have similar scenarios I'd be very interested
to hear on/off list :)
The traffic profile seems to be quite spiky, but the average figure is
definitely still relevant on these small scales. 1000 * 500 = 500Mbit,
so plenty space for expansion and multiple users peaking at the same
time. It remains to be seen how this'll be affected by time though,
perhaps in 2-3 years we'll be seeing 1Mbit peak average from these kinds
of users. Perhaps even sooner if Netflix-esque services and YouView
explode over here.
Finally, what do people think of selling a 1G service with 1G backhaul
(and potentially 10s or 100s of customers buying this service
alongside n*100s of customers with 100M service)?
Having 500Mbit peak usage leaves only 500mbit. Not much to fit many 1G
customers into. :)
adam.
