Check these out:
http://compnetworking.about.com/od/w...ldef_wimax.htm
http://en.wikipedia.org/wiki/WiMAX
http://4g360.com/
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the backbone is already there though, and is included in the cost of copper as it is required to support ADSL 2 etc.
the UFB rollout though, is about putting it to the doorstep.
I get the impression that people think that as technology improves, the data carrying capacity of cell networks will increase without limit.
There are in fact some pretty well defined physical limits on the capacity of radio networks - they simply don't have the ultimate potential of fibre due to the laws of nature and no technology will change this ( in the same way that no technology will allow us to travel faster than light) The frequency that can be broadcast by a cell phone transmitter is limited to the range of the spectrum that we know as 'radio frequency' (assuming here that we don't want to fry ourselves) and the amount of data that can be carried by a given frequency is limited by nature (Nyquist and Shannon showed this quite some time ago).
At the moment 4G radio can deliver good data speeds to some people, some of the time, but when (not if, in my opinion) the demand for capacity grows, it simply won't be an option to supply by radio - fibre or some other technology will be the answer
Not trying to say that CNU is a particularly good investment here and now -just saying that radio won't be the long term answer unless we all go back to simpler times.
one can never predict the limitations of current technology though despite 'the laws of nature'
for example. first modem connection was a 14.4 , then a 33.3 then 56k all supposedly the maximum possible.
Then, lo and behold adsl came along and suddenly that copper wire could do mb/s - same copper wire, same laws of nature.
Now ADSL2 and VDSL, 10's of mb/s.
I'm dubious about the laws of nature ;).
So how will all that allow you to make money from CNU? And more importantly when? And is the ultimate - the speed of light - not under question? And how fast is a Quantum Leap that allows a particle of energy to move between two locations without crossing the intervening space. Glass fibre is great stuff but it one stage in a technology that will be unrecognisable in ten years.