[opendtv] Re: DEA-what? was: Re: Re: News: DIRECTV Sued Over HDTV Picture Quality
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 21 Sep 2006 14:32:33 -0400
Kon Wilms wrote:
> The modulation choice for this 'system' is a joke - cellular
> with multicast or other data-network overlay is the natural
> choice here people.
I think the natural choice for info-to-population (i.e not two-way) in
crisis situations is a system where a small number of towers can
redundantly cover the market area. This describes a number of big
sticks, such as used by radio and TV broadcasters, more than a cellular
network. Knock out one, two, three, four, ... , and you can still cover
the entire area.
Multicast overlay is great to avoid saturation of the cell net, but the
cell net still requires a lot more infrastructure to cover a large area
than a small number of redundant big sticks.
We have no decent cell coverage where we live, for example. Only works
if you stand up next to certain windows. Knock out one of those small
sticks, or part of the net that feeds them, and we'd be out of luck
completely.
Bert
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