[AusNOG] Alternative to NBN?

[David Connors]

On Fri, May 20, 2011 at 4:17 PM, Mark Newton <newton at internode.com.au>wrote:

> More bandwidth means more spectrum required to achieve the desired
> bitrate, which means we carve our spectrum up into larger chunks, which
> means we need the same amount of it for the same number of Mbps
> regardless of how much "RF air time" (yeesh) we use.
>

Or you do as we have done to get to where we are and improve the
technologies relating to modulation and get a higher bitrate per hz.


> Shannon Hartley Theorem is your friend.
>

More of an enemy, but certainly not really relevant when talking about
wireless performance figures on the market in Oz today as we're not at the
limit yet in either bitrate per Hz of channel bandwidth or sheer quantity of
spectrum available for more channels.

Once *LTE is deployed AND we have run out of spectrum* (which is a hell of a
long way off with multiples of NextG spectrum being released by the govt in
the coming years) then you might consider we're up against Shannon's limit.
Even then LTE-Advanced starts proposes a lot of architectural changes that
will get us further and beyond that who knows.

Even if the modulation technologies stayed where NextG is today but they
just chopped up and sold 700Mhz - we would have insanely competitive and
cheap wireless in place well before the NBN is complete.

Most people on this list argue that wireless is shared = fail = we need NBN.
50K new users on NextG a month would argue differently and (cellular)
wireless is more relevant in terms of sheer number of use cases in the post
PC world we're heading toward anyway.

My thesis is that this is good enough for a vast majority of non-technical
end users of the Internet and undermines the business case for the NBN.

David.

-- 
*David Connors* | david at codify.com | www.codify.com
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