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telcodad

join:2011-09-16
Lincroft, NJ
kudos:6

2 edits
reply to telcodad

Re: Dream Modem - 24x8

FYI -Some early reports on that DOCSIS 3.1 session today at the Cable-Tec Expo:

Cable-Tec Expo: DOCSIS 3.1 to Blaze Trail Toward 10 Gig Speeds
CableLabs: Spec Won’t Require Plant Upgrades, Will Be Backward-Compatible With 3.0

By Todd Spangler, Multichannel News - October 18, 2012
»www.multichannel.com/cable-opera···s/139883

and:

Diving Into Docsis 3.1
By Jeff Baumgartner, Light Reading Cable - October 18, 2012
»www.lightreading.com/document.as···lr_cable

EDIT: And also:

Cable-Tec Expo: SCTE Forms Working Group for DOCSIS 3.1
Motorola Technical Fellow Jack Moran Named Chair

By Todd Spangler, Multichannel News - October 18, 2012
»www.multichannel.com/broadband/c···1/139880

EDIT 2: And now:

Docsis 3.1 Targets 10-Gig Downstream
By Jeff Baumgartner, Light Reading Cable - October 18, 2012
»www.lightreading.com/document.as···lr_cable



telcodad

join:2011-09-16
Lincroft, NJ
kudos:6

Today's news items on the new DOCSIS 3.1 spec:

Cable ops reveal game plan for DOCSIS 3.1
With FTTH threat diminished, MSOs can wring more from HFC

By Jim Barthold, FierceIPTV - October 19, 2012
»www.fierceiptv.com/story/cable-o···12-10-19

and:

DOCSIS 3.1: Engineers finding a way to continue using HFC
Improved technology, gateway device promise big bandwidth to home

By Jim Barthold, FierceIPTV - October 19, 2012
»www.fierceiptv.com/story/docsis-···12-10-19



telcodad

join:2011-09-16
Lincroft, NJ
kudos:6

Well, they did say things will move faster with DOCSIS 3.1 than with 3.0:

Docsis 3.1 Set for a Spring Fling
By Jeff Baumgartner, Light Reading Cable - October 29, 2012
»www.lightreading.com/document.as···lr_cable

From the article:

The first iteration of hardware specs for Docsis 3.1 could emerge as soon as next March or April to help cable modem and cable modem termination system (CMTS) vendors get a jump on product development for the new, speedier CableLabs platform, multiple industry sources tell Light Reading Cable.
:
According to the information presented by CableLabs at this month's Society of Cable Telecommunications Engineers (SCTE) Cable-Tec Expo in Orlando, the plan is to have the Docsis 3.1 specs "substantially complete in 2013," setting the stage for the first wave of Docsis 3.1 products to appear sometime in 2014.


telcodad

join:2011-09-16
Lincroft, NJ
kudos:6

1 recommendation

This item »www.lightreading.com/blog.asp?bl···d=227176 on the Light Reading Cable site concisely lists the main areas in which DOCSIS 3.1 signaling will be significantly different from earlier versions:


•Using a higher order of modulation, for greater spectral efficiency, could conceivably add at least 25 percent more capacity and up to 50 percent more over the same HFC network. Note that the proposed DVB-C2 specification in Europe has been tested to support 4096 QAM downstream within existing cable networks.

•A new modulation format, Orthogonal Frequency-Division Multiplexing (OFDM), that takes efficiency and robustness to new levels. OFDM enables sub-carriers to be squeezed directly against one another, eliminating the need to use valuable RF spectrum as guard bands. At the same time, the longer symbol durations of the sub-carriers make OFDM more capable of dealing with impulse and burst noise than are SC-QAM guard bands.

•The use of Low Density [Parity] Check (LDPC) coding to improve noise immunity by several dB over current Reed-Solomon encoding at similar channel efficiency, or to provide greater channel efficiency at the same MER (modulation error ratio).


telcodad

join:2011-09-16
Lincroft, NJ
kudos:6

2 recommendations

An article about technology developed by Javelin (f/k/a Vyyo), that can help cable companies extend their operations above the current 1GHz limit, and enable new DOCSIS 3.1 features:

Ex-Moto Execs Hope to Revive Javelin
By Jeff Baumgartner, Light Reading Cable - December 3, 2012
»www.lightreading.com/document.as···lr_cable