[opendtv] Re: Spectrum is too valuable

  • From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
  • To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
  • Date: Wed, 18 Nov 2015 02:54:04 +0000

Craig Birkmaier wrote:

You are correct. The links are different. But the information about
DOCSIS was the same.

If the information was the same, you would not be questioning why the 10 Gb/s
capacity was predicated on double the cable bandwidth and no broadcast streams,
or that DOCSIS 3.1 uses a whole lot more cable spectrum than even DOCSIS 3.0
did, in order to expand broadband capacity as much as it does.

But most important, the higher band pass and theoretical limits of
DCOSIS 3.1 are irrelevant to your original point, which was that the
MPEG-2TS channels assigned to digital cable should be recovered now
for broadband.

Obviously, Craig, you need to read the standard, because you still haven't
understood this point. The short version is that 5+ Mb/s come from the original
900 MHz, and the other 5+ Mb/s come from the new spectrum. But this requires
reuse of that 5+ Mb/s now being dedicated to broadcast. Obviously, if you don't
deploy 5 Mb/s of broadband in the original 900 MHz, then you can retain some or
all of the broadcast spectrum. You don't need to belabor the obvious.

Read this, from your own source:

------------------------
http://www.fiercetelecom.com/story/cox-accelerate-gigabit-broadband-plans-docsis-31-2017/2015-09-23

Ultimately, the DOCSIS 3.1 standard-based CPE will be able to deliver up to
10/1 Gbps. Early versions will be capable of supporting nearly 5/1 Gbps.

The move to leverage DOCSIS 3.1-based gear will enable Cox to achieve its goal
of delivering 1 Gbps services throughout its serving area. Ahead of DOCSIS 3.1,
the service provider has been rolling out 1 Gbps service in select markets
using FTTH technology, including Baton Rouge, Las Vegas, New Orleans, Phoenix,
San Diego, and across Virginia.

When it initially debuted its 1 Gbps service last year, the cable MSO said it
would leverage a mix of GPON-based FTTP technology and extend into the
remaining area of the market using DOCSIS 3.1-enabled equipment when it becomes
available.
------------------------

All they are deploying is **1 Gb/s broadband**, using DOCSIS 3.0 or whatever
GPON scheme they have now. Read the first sentence in that quote again, to
grasp the unspoken words. If you want to deploy 5 Mb/s in 900 MHz ("early
versions"), or 10 Mb/s in 1800 MHz (DOCSIS 3.1), you have to eliminate the
wasteful broadcast spectrum. This is not so complicated, Craig. Here's the
original point once again, Craig:

It is indeed feasible to connect homes for Internet-delivered TV, **if you
repurpose the broadcast spectrum**. Even in the very short term.

It is not a guess that cabling may need to be replaced to
reach the full theoretical limits of DOCSIS 3.1

Glad you changed your tune. I can accept "may." In some cases, it's possible
that cleaning up connectors would do the trick.

I have had virtually unlimited choice in content sources since
the '80s, first with a VCR, then later via DVD.

Yes, and you can also go to the public library. You're changing the subject.

You are mistaken.

Prove it, Craig. Provide a link.

Bert



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