[opendtv] Re: Spectrum is too valuable

  • From: Craig Birkmaier <brewmastercraig@xxxxxxxxxx>
  • To: opendtv@xxxxxxxxxxxxx
  • Date: Tue, 17 Nov 2015 23:29:32 -0500



Regards
Craig

On Nov 17, 2015, at 9:54 PM, Manfredi, Albert E
<albert.e.manfredi@xxxxxxxxxx> wrote:

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.

I am not questioning the capacity you are hung up on. It's wonderful that you
can deliver 10 Gbps by dedicating all the bandwidth of a theoretical 1.788 GHz
HFC system to broadband.

It is also completely irrelevant and has nothing to do with this discussion.

DOCSIS 3.1 Is being introduced as an upgrade to existing 1 GHz HFC systems,
alongside other services, as us the case today with DOCSIS 3.0.

You claimed that a system could recover the spectrum used for digital TV
services and offer sufficient broadband nitrates to replace those TV services
with OTT services. I did the math to prove that was not the case.

Even with the full theoretical 10 Gbps you could not deliver the 25/3 service
the FCC now calls broadband to 500 homes. And you cannot deliver the
theoretical 20 Mbps per home without upgrading the systems to 1.788 GHz.

Enough already! It ain't gonna happen your way.

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:

Perhaps you are suffering from a reading comprehension problem.

That is 1 Gbps to ONE home, not one PON divided by the number of homes served
by that PON.

I currently get 50 Mbps broadband using DOCSIS 3.0. I can upgrade to 100 Mbps
TODAY.

Cox is NOT INTERESTED in taking a step backward. They want to deliver gigabit
service throughout their service area to compete with Google and others who may
overbuild.

The article, and another I posted, tell us that Cox is currently deploying 1
Gbps TO EACH HOME in selected markets with FTTH in new build outs. They plan to
offer 1 Gbps TO EACH HOME over HFC systems by 2017. To do this it will likely
require far fewer that 500 customers per PON. The actual number will depend on
the number of homes on that PON willing to pay for 1 Gbps service, and the peak
utilization stats.

You are hung up trying to get 20 Mbps to each home, and seem willing to accept
5-10 Mbps.

Talk about a disconnect!

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

First, almost anyone who wants "Internet-delivered TV" can get it today from
the cable/FIOS systems. 80% of U.S. homes have access to 25/3 broadband service
today. Only 6.3% of U.S. homes DO NOT have access to 4/1 broadband, the FCC's
previous definition of broadband.

IF, and this is a BIG IF, everyone wanted to switch to Internet-delivered TV
immediately there would be a big problem. The bandwidth needed dies not
currently exist.

The heavy lifting for TV is still done with broadcast MPEG-2TS streams. These
streams deliver high quality HD throughout the PON. Replacing them with
broadband at this time would limit the downstream bit rate per home to about 11
Mbps as I have shown repeatedly.

The FCC and the broadband industry believe the solution is to move to much
higher bit rates. The FCC redefined broadband as 25/3, but stated that they
would have preferred 100 Mbps downstream.

You are an order of magnitude behind the times.

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

I did not change my tune. I noted the issues much earlier in this thread.

You talk about labor. The reality is that to get to 1.788 GHz a bunch of stuff
must be upgraded:
- The amps in the PONs
- old drops with inadequate cable
- trunks that cannot handle the higher frequencies
- and yes, dirty connectors.


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.

I did not. We've been down this dead-end before. The days of having only 3-4
live linear choices ended in the early '80s.


Let me know when the Internet delivers all of the content available from the
MVPDs. It probably will some day, but the content owners are not ready yet.

Regards
Craig

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