[opendtv] Re: Point-Counterpoint: Peter Tannenwald Responds To The Chairman : CommLawBlog
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
- Date: Fri, 26 Nov 2010 16:48:30 -0600
Craig Birkmaier wrote:
> Where in Peter's blog did he advocate using LTE for data broadcasting?
Where in my arguments do you see that I was only talking about data
broadcasting? The arguments addressed all kinds of broadcasting, including, but
not limited to, data files.
In the article, he mentions how Verizon was going to create a form of
broadcasting over its LTE network, for the TV streams. And then he talks about
how ATSC is supposedly "inefficient" at this. (See my previous post for the
exact quotes.)
The two points are internally inconsistent.
Not only that, but the idea of broadcasting over a cellular two-way network is
not an innovation. He claimed that "first decade" technology didn't allow this.
But it does.
First of all, there have always been broadcast channels in 2G and 3G networks,
even if these were not used to pass users' data. They are there as part of the
signaling mechanism. So expanding on this concept should certainly not qualify
as a big-deal innovation.
But more applicably, using a 3G or 4G network to transmit IP multicasts is also
not particularly innovative, and such multicasts also do not require repetition
of every stream to every user. Search under MBMS. The standard has been
available since 2004. It was designed for exactly the same applications that
the article mentioned.
And just because the letters "LTE" are involved, you shouldn't make the
illogical leap that it must be more efficient than ATSC. The modulation per se
is not "more efficient," and the extra baggage carried around, because this LTE
network is actually a two-way network, further conspires to reduce the spectral
effiency. Yes, ease of reception can probably be greater, but then again, if
you deploy a dense network of low-powered TRANSLATORS for ATSC, similar to this
LTE network but one-way broadcast only, you would likely see greater spectral
efficiency and equal ease of reception as the LTE cell network.
Bert
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