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jlivingood
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join:2007-10-28
Philadelphia, PA

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Re: [Connectivity] What is docsis 3.1?

said by telcodad:

OK, thanks for that update Jason. Are you at the Cable-Tec Expo in Denver this week?

Nope - too much work to do.

Chris 313
Because It's Geekier
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join:2004-07-18
Houma, LA
·AT&T FTTP
·Comcast XFINITY

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said by telcodad:

said by telcodad:

BTW - The National Cable & Telecommunications Association (NCTA), CableLabs and other cable organizations will now be marketing/promoting DOCSIS 3.1 technology to consumers using the "Gigasphere" brand name:
:

And today D3.1/"Gigasphere" has an official logo:

‘Gigasphere’ Has A Logo
Consumer-Facing Brand For DOCSIS 3.1 Announced In April

By Jeff Baumgartner, Multichannel News - September 23, 2014
»www.multichannel.com/blo ··· o/384096

Did you see this coming? A G shaped sphere. Wonder how long it took to think that up and how much it cost them?
Chris 313

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Chris 313 to jlivingood

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said by jlivingood:

said by telcodad:

OK, thanks for that update Jason. Are you at the Cable-Tec Expo in Denver this week?

Nope - too much work to do.

Crank the dial up to 11, Jason!

telcodad
MVM
join:2011-09-16
Lincroft, NJ

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telcodad to jlivingood

MVM

to jlivingood
said by jlivingood:

Yeah - we are pushing hard to go faster. Also interesting to note, D3.1 will natively include Active Queue Management (AQM) to better address buffer bloat. See »en.wikipedia.org/wiki/Bu ··· ferbloat and »www.cablelabs.com/how-do ··· agement/ and »www.cablelabs.com/wp-con ··· work.pdf for details.

This article appears to discuss Comcast's DOCSIS 3.1 plans in more detail:

Just moving to D3.1 modems can be a huge benefit
By Brian Santo, CED Magazine - September 23, 2014
»www.cedmagazine.com/news ··· -benefit
quote:
Comcast expects to start trialing DOCSIS 3.1 technology in the second half of next year, shortly after product becomes available in the first half of the year ...

telcodad

telcodad

MVM

Karl summed up all of these D3.1 news items today into one DSLR news article this evening: »CableLabs: DOCSIS 3.1 Slightly Ahead of Schedule [45] comments
telcodad

2 recommendations

telcodad

MVM

said by telcodad:

Intel and MaxLinear have announced the development of a DOCSIS 3.0 cable modem chipset that can bond up to 32 downstream channels and that is specifically designed to be be able work on (co-exist with) a DOCSIS 3.1 network:

Intel/MaxLinear Chip 'Compatible' With DOCSIS 3.1 Nets
New Silicon Can Bond 32 DOCSIS 3.0 Channels

By Jeff Baumgartner, Multichannel News - September 12, 2014
»www.multichannel.com/new ··· 1/383784

And now Cisco has a new line card upgrade for its model UBR10012 CMTS that enables the bonding of up to 32 D3 channels on that end:

Cisco Plays The Gigabit Card
New CMTS Line Card Can Bond 32 DOCSIS 3.0 Channels

By Jeff Baumgartner, Multichannel News - September 22, 2014
»www.multichannel.com/new ··· d/384079
telcodad

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telcodad to Thenewguy201

MVM

to Thenewguy201
FYI - A nice article explaining all about DOCSIS 3.1 by Leslie Ellis on the MCN site today:

DOCSIS 3.1 and the Bandwidth Bender
Traffic Growth Ready to Explode

By Leslie Ellis, Multichannel News - September 24, 2014
»www.multichannel.com/new ··· r/384135
 
EDIT: And also this article about the 'business side" of DOCSIS 3.1:

SCTE: The Business of DOCSIS 3.1
MSOs Must Look Beyond Capacity, Speed to Weigh Platform's Benefits

By Craig Kuhl, Multichannel News - September 24, 2014
»www.multichannel.com/new ··· 1/384147
quisp65
join:2003-05-03
San Diego, CA

quisp65 to Thenewguy201

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Will we still see the presence of channels in 3.1? Will the first set of hybrid modems use both the 3.0 and 3.1 end of the spectrum to achieve the first set of deployment speeds? In other words... will the user be getting the bandwidth off two different platforms.... 3.0 & 3.1?


Agent 86
@98.209.217.x

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Agent 86

Anon

"will the user be getting the bandwidth off two different platforms.... 3.0 & 3.1?"

Yes.
RightHere
Premium Member
join:2003-02-02

RightHere to telcodad

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Fabulous. Now where do I sign up for the trial?

telcodad
MVM
join:2011-09-16
Lincroft, NJ

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telcodad to Thenewguy201

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to Thenewguy201

DOCSIS 3.1 Field Trials now in progress

FYI - An article on the Light Reading site today:

Comcast Puts DOCSIS 3.1 Live in the Field
By Mari Silbey, Light Reading - March 18, 2015
»www.lightreading.com/cab ··· d/714494
quote:
... Comcast Vice President of Access Architecture Jorge Salinger has ... announced that Comcast is now testing DOCSIS 3.1 in the field.

"The target for us is to be in the field establishing network readiness in 2015," he said. "Our overall goal is to be able to deploy DOCSIS 3.1 and gigabit-per-second in a broad scale starting in 2016." ...
 
EDIT: Karl now has a DSLR news item up on this: »Comcast Is Preparing To Launch 1 Gbps Broadband Service [100] comments

EDIT2: Also an article on the MCN site now: »www.multichannel.com/new ··· t/388926

SeanWhite
@comcast.net

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Re: [Connectivity] What is docsis 3.1?

Let's not forget the 16x4 modems support at least 648Mbps and Comcast doesn't even offer anything near this yet so there is plenty of room to grow on DOCSIS 3.0 still. Interoperability better be very important to Comcast if they don't want to risk alienating and aggervating their customers.

telcodad
MVM
join:2011-09-16
Lincroft, NJ

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telcodad

MVM

said by SeanWhite :

Let's not forget the 16x4 modems support at least 648Mbps and Comcast doesn't even offer anything near this yet so there is plenty of room to grow on DOCSIS 3.0 still.

Well, one 256QAM 6 MHz wide, 5120 Ksym/sec carrier provides a net data throughput of about 38 Mbps. 16 of those add up to 608 Mbps max, and that assumes your modem has the node all to itself (i.e., no sharing with your neighbors).

That's why most areas are limited to Extreme 150 service or less.

Comcast does provide an "Extreme 250" tier in some Google Fiber areas though: »Comcast Offering 250 Mbps in Provo for $80

And Time Warner Cable has their Maxx 300/20 tier now: »Time Warner Cable: 75% Should Get 'Maxx' Upgrades By End of 2016

whfsdude
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join:2003-04-05
Washington, DC

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whfsdude

Premium Member

said by telcodad:

And Time Warner Cable has their Maxx 300/20 tier now: »Time Warner Cable: 75% Should Get 'Maxx' Upgrades By End of 2016

RCN also has a 330mbit/s plan. »www.multichannel.com/new ··· c/385641

telcodad
MVM
join:2011-09-16
Lincroft, NJ

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telcodad

MVM

said by whfsdude:

said by telcodad:

And Time Warner Cable has their Maxx 300/20 tier now: »Time Warner Cable: 75% Should Get 'Maxx' Upgrades By End of 2016

RCN also has a 330mbit/s plan. »www.multichannel.com/new ··· c/385641

Comcast is expected to eventually upgrade many areas to 24 downstream channels, which will help support some higher-speed DOCSIS 3.0 tiers then.

owlyn
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join:2004-06-05
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said by davidc502:

said by tshirt:

God save us all from buzz word marketing.

All you need is the "Cloud"!

Where does my data go? Well sir, it goes into the "Cloud".

I thought it went into the wall.

DarkLogix
Texan and Proud
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join:2008-10-23
Baytown, TX

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DarkLogix to train_wreck

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Re: [Connectivity] Re: What is docsis 3.1?

said by train_wreck:

so according to specs downstream speeds can apparently go above 1gbps? wonder if/how regular folk will see speeds like that on their LANs? 10gig ethernet? (prolly not cause of the length limitations)

Well 802.11 AC wave 1 is claimed to be upto 1.3gbps
and wave2 will bring some efficiency and 160mhz channels so 802.11ac wave 2 should be atleast 2.6gbps.
DarkLogix

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DarkLogix

Premium Member

As some post that I can't reply to said that 256 qam was the top I figured I'd mention that its not.
»blog.aviatnetworks.com/2 ··· m-usage/

now when can we get QAM 2048? Turn it to 11.
DarkLogix

DarkLogix to owlyn

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to owlyn

Re: [Connectivity] What is docsis 3.1?

said by owlyn:

said by davidc502:

said by tshirt:

God save us all from buzz word marketing.

All you need is the "Cloud"!

Where does my data go? Well sir, it goes into the "Cloud".

I thought it went into the wall.

The wall is the cloud too maybe, or not.

telcodad
MVM
join:2011-09-16
Lincroft, NJ

3 recommendations

telcodad

MVM

said by owlyn:

said by davidc502:

said by tshirt:

God save us all from buzz word marketing.

All you need is the "Cloud"!

Where does my data go? Well sir, it goes into the "Cloud".

I thought it went into the wall.

said by DarkLogix:

The wall is the cloud too maybe, or not.

I think we should actually call Comcast's version of it a "nebula."
quote:
Nebula

From the Latin word for “cloud.”

A nebula is a cloud of gas and dust located between stars that appears disorganized and disordered.

Also see: "Nebulous"

mediaguy
Politically Incorrect
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join:2014-01-22
Guitar Town

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mediaguy

Premium Member

The Comcast Nebula...

That explains SO much!

(I can't stop laughing)

owlyn
MVM
join:2004-06-05
Newtown, PA

4 recommendations

owlyn

MVM

Their new marketing name will be Xfinity Nebulosity. Xfinity is how long you wait to get your service fixed. Nebulosity is the kind of answer you get when you call for help.
bleagh
join:2004-03-11
Salt Lake City, UT

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bleagh to Thenewguy201

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to Thenewguy201
I would like to point out that the numbers being given are NOT real world usable numbers. For example, a D3 modem with 4 download channels will advertise 160 Mbps download, yet people using it with Comcast 105 service often notice slowdowns at peak usage hours.

To be more realistic, one should really only plan on using a D3 modem up to about half it's 'advertised' rating. Which means:
4 channel up to about 80 Mbps
8 channel up to about 160 Mbps
16 channel up to about 320 Mbps
24 channel up to about 480 Mbps
32 channel up to about 640 Mbps

This means you will NOT likely see DOCSIS 3.0 going much above 600 Mbps.

You can expect the same sort with DOCSIS 3.1.

For example, Broadcom is saying their first generation D3.1 chip will be capable of 4 to 5 Gbps. But it will be capable of BOTH D3.0 and D3.1, and supposedly be able to run the BOTH at the same time! And the 4 to 5 Gbps is assuming running both!

Subtract the 1.2+ Mbps they are claiming for D3.0 and you are left with 3+ Gbps for D3.1. Cut this in half and you are left with between 1 and 2 Gbps as the MAXIMUM for first generation D3.1.

So real world speeds, DOCSIS 3.0 is good for up to around 600 Mpbs (though you may never see such OFFERED). First generation DOCSIS 3.1 should be able to double that.

The speeds that will actually be offered with D3.1 will be another question. First generation D3.1 will be cables answer to the growing number of gigabit fiber and such. As such we will likely see speed up to 1 Gbps being offered in many markets (but maybe not all).

While it is possible that Comcast will want to beat the competition and offer something a bit higher (say 1.2 Gbps or even 1.5 Gbps), they may also decide such is too risky. Right now is seems that nobody is in a hurry to push things above 1 Gbps. I am guessing that cable will likely follow suit rather than buck this trend (tho I could be wrong! And I hope I am!).

And while DOCSIS 3.1 rollout is reportedly going to start as early as later this year, it will likely be 2-3 years (or more) before many (most?) can actually get such.

Cable is already ahead of the curve in most areas, and have only fallen behind in areas that are offering gigabit fiber and such. So they may just do a fast rollout of D3.1 in areas where they want to catch up, and do a much slower rollout everywhere else.

telcodad
MVM
join:2011-09-16
Lincroft, NJ

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telcodad

MVM

said by telcodad:

said by telcodad:

BTW - The National Cable & Telecommunications Association (NCTA), CableLabs and other cable organizations will now be marketing/promoting DOCSIS 3.1 technology to consumers using the "Gigasphere" brand name

And today D3.1/"Gigasphere" has an official logo:

‘Gigasphere’ Has A Logo
Consumer-Facing Brand For DOCSIS 3.1 Announced In April

By Jeff Baumgartner, Multichannel News - September 23, 2014
»www.multichannel.com/blo ··· o/384096

 
Gigasphere now has a new microsite »www.gigasphere.com/ that offers high-level details about DOCSIS 3.1:

Cable Unwraps ‘Gigasphere’ Microsite
Industry Using Term as Consumer-Facing Brand for DOCSIS 3.1

By Jeff Baumgartner, Multichannel News - April 10, 2015
»www.multichannel.com/new ··· e/389656
telcodad

telcodad

MVM

Re: DOCSIS 3.1 Field Trials now in progress

FYI - Technicolor will be demonstrating a DOCSIS 3.1-based device called the "MediaAccess TC4400" at an event in Chicago next week:

INTX 2015: Technicolor to Show D3.1-Based Modem
DOCSIS 3.1 Device in ‘Lab Testing With Major Cable Providers'

By Jeff Baumgartner, Multichannel News - May 1, 2015
»www.multichannel.com/new ··· m/390272
quote:
Indicating the progress being made on cable’s new multi-gigabit platform for HFC, Technicolor said it will show off a DOCSIS 3.1-based device called the MediaAccess TC4400 at next week’s INTX event in Chicago.

Technicolor (booth 2123), said the device is “currently in lab testing with major cable providers.”

The first wave of D3.1 modems will be hybrids that support and combine DOCSIS 3.0-based based on the bonding of multiple 6MHz-wide or 8MHz-wide channels, and a new portion of DOCSIS 3.1-based spectrum that uses blocks of OFDM-based subcarriers. The minimum configuration set by the CableLabs specs calls for those devices to handle a minimum of 24 bonded downstream and 8 upstream single-carrier QAM channels (on the D3.0 side), and two 192-MHz wide OFDM blocks in the downstream, and two 96 MHz-wide OFDM blocks in the upstream (on the D3.1 side).

That configuration, which Technicolor will show, will be capable of 5 Gbit/s down and up to 1 Gbps upstream when fully utilized. ...

SeanWhite
@myvzw.com

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Re: [Connectivity] Re: What is docsis 3.1?

Gotta wonder if firmware updates will bring wave 1 devices to wave 2 levels.
SeanWhite

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Re: [Connectivity] What is docsis 3.1?

Would love if Comcast would be transparent with their specific plans for DOCSIS 3.1. What is being purchased, what is being upgraded, brands, models, etc. Are they going to install brand new D3.1 CMTS's or are they just going to replace components on the CMTS's they are already using and if so what components? When are we gonna see faster speed increases nationwide that actually benefits the use of 8 and 16 and 24 bonded modems? Extreme 305 and Blast 200 and Performance 105 are a thought.

Mike Wolf
join:2009-05-24
Tuckerton, NJ

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Expected or reported to or announced?

SeanWhite
@myvzw.com

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Actually the reported speeds are:
4x4 is 172
8x4 is 343
16x4 is 686
24x8 is 1029
So that might be better for your math equation.

Mike Wolf
join:2009-05-24
Tuckerton, NJ

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Re: DOCSIS 3.1 Field Trials now in progress

I read that 3.1 adds some serious capabilities for identifying problems on the network remotely, which reduces costs, but I wonder if that remote diagnostic that is mentioned is compatible with the 3.0 devices as well.