[opendtv] Re: News: TV Braces for the Apple Tablet

  • From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
  • To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
  • Date: Tue, 2 Feb 2010 13:43:04 -0600

Craig Birkmaier wrote:

>> A cell network is exactly the same thing as a big stick model,
>> scaled down. Which means, you STILL have to protect those
>> frequencies. It's just that this protection is done on a
>> smaller scale, and infinitely more often, that's all. So,
>> instead of worrying about this protection issue only from one
>> city to the next, you worry about it neighborhood by
>> neighborhood, using lots and lots of towers, where one tower
>> is all you need if the signal is one-way broadcast that many
>> can use simultaneously.
>
> Hmmmmm...
>
> How many times are TV channels reused between Washington and
> Boston?
>
> How many times is a cellular band reused?

Are you serious?

Does it take fewer frequency channels to cover the East Coast with a cellular 
broadcast network than it does with big sticks? No, Craig. It doesn't. You 
simply have to reuse those same frequencies much more often, IF your goal is 
continuous coverage.

Oh yes, one big difference. If you must reuse the same set of frequencies every 
10 miles rather than every 250 miles, it takes a whole lot more towers to get 
the job done.

You seem to have a hard time wrapping your head around the concept that the 
small cells of a cell network are mandated PRIMARILY by the need to support 
many local two-way unicast links, to provide access to the wired network 
infrastructure. It's an entirely different problem, Craig.

Bert
 
 
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