& cplSiteName &

Cable Ponders Life After Docsis

Jeff Baumgartner
LR Cable News Analysis
Jeff Baumgartner
4/26/2010
50%
50%

Two industry sources have confirmed that CableLabs has begun work on a data-over-coax project that looks beyond Docsis 3.0 and might bring an end to the practice of dividing bandwidth into 6MHz or 8MHz channels.

The discussions, reported by Multichannel News on Sunday, are in the "pretty early stages," a source confirmed to Light Reading Cable. "This would be a big effort," the person added, saying it would require the development of new chips and new systems.

According to the report, CableLabs and its members are working from scratch, targeting capacities of 5 Gbit/s or more using new media access control (MAC) and physical layer (PHY) components.

That means it would be years before products are developed, and even longer before they might be deployed.

"I assume they're planning for the second half of the decade, because this would be a massive effort," says Heavy Reading senior analyst Alan Breznick, noting that several operators are already looking at ways to graft EPON to their Docsis systems for business services and some limited residential service scenarios.

And no one is suggesting that the industry is getting ready to migrate to a channel-free, and possibly more efficient, spectrum environment anytime soon. "Docsis 3.0 is very strong, and has good legs," notes an industry source who is familiar with the CableLabs project.

CableLabs declined to comment. The Louisville, Colo.-based R&D house told Multichannel News that it "is in business to explore many different technologies on behalf of its members."

Getting to 1 Gig
Capacity of 5 Gbit/s already exists on most upgraded cable plant, but the bandwidth is divided into the aforementioned channels. (North American Docsis uses a 6MHz channel width; EuroDocsis uses 8MHz.) A plant built to 750MHz supports capacity for almost 5 Gbit/s, while 1GHz plants support more than 6 Gbit/s, with the individual channels divided up for the actual cable services (broadcast video, video-on-demand, switched digital video, VoIP, high-speed data, etc.).

And Docsis 3.0 is perfectly capable of delivering burst speeds in excess of 1 Gbit/s. Vendors have already told Light Reading Cable that they are working on D3 modem configurations that can bond eight or 16 downstream channels, and are seeing requests to bond 32 downstream channels -- enough for a 1.2 Gbit/s burst. (See The Ultimate Cable Modem .)

Comcast Corp. (Nasdaq: CMCSA, CMCSK) and other MSOs have been deploying wideband aggressively; Heavy Reading forecasts that among North American MSOs, Docsis 3.0 will pass 90 million homes by 2012. (See Wideband Growth Continues in North America.)

Comcast, meanwhile, is hooking up with an array of partners on a next-generation access architecture project that mixes Docsis 3.0, PON, and a way to help cable migrate to more IP-delivered video services. (See Cox Adds Weight to Comcast's Big Box Project and Comcast Proposes Its God Box .)

Even if the CableLabs project is just starting, the fact that such work is underway indicates that the cable industry intends to squeeze as much out of its hybrid fiber/coax (HFC) plant as it can before moving to a fiber-to-the-home (FTTH) platform.

That has not stopped operators such as Canada's Shaw Communications Inc. from considering the use of FTTH architectures and Radio Frequency Over Glass (RFoG) in all their new buildouts. (See Shaw Vetting FTTH for All New Builds and Costs Could Keep RFoG a Niche Player .)

The CableLabs effort also calls into question whether the consortium will go to the lengths to specify a Docsis-optimized FTTH platform that uses the technology's management plane. A July 2006 CableLabs report called "Cable Response Alternatives to FTTP" caused a bit of a stir by suggesting that it might be more cost-effective for MSOs to deploy FTTP when node sizes are less than 125 homes passed.

— Jeff Baumgartner, Site Editor, Light Reading Cable

(3)  | 
Comment  | 
Print  | 
Newest First  |  Oldest First  |  Threaded View        ADD A COMMENT
Jeff Baumgartner
50%
50%
Jeff Baumgartner,
User Rank: Light Beer
12/5/2012 | 4:38:25 PM
re: Cable Ponders Life After Docsis
Getting more word on this project, and I'm hearing that this approach under consideration isn't entirely new, since it's been on the table for some time.



But it's interesting that cable's taking a fresh look at this idea now, and suggests that D3 won't be the end-game for data-over-coax.



I'm still cultivating details on all this, but any thoughts out there as to why a channel-free world would offer cable a more efficient environment to deliver multi-gigabit speeds?
JB

rjmcmahon
50%
50%
rjmcmahon,
User Rank: Light Beer
12/5/2012 | 4:26:09 PM
re: Cable Ponders Life After Docsis


Probably cheaper to use optical ethernet equipment and the broadcast biz-model would likely get in the way.

furious_george
50%
50%
furious_george,
User Rank: Light Beer
12/5/2012 | 4:26:09 PM
re: Cable Ponders Life After Docsis


I would assume that going channel free would indicate the reduction in guardband for each 6 or 8 MHz channel. 


Note I am an optics guy, and I am assuming that this is being handled similarly to some of the talk around flexible ROADM channels for speeds of 400G and beyond.


furious_george

From The Founder
NFV's promises of automation and virtualization are intriguing, but what really excites service providers is the massive amount of money they could save.
Flash Poll
Live Streaming Video
Charting the CSP's Future
Six different communications service providers join to debate their visions of the future CSP, following a landmark presentation from AT&T on its massive virtualization efforts and a look back on where the telecom industry has been and where it's going from two industry veterans.
Huawei Videos
The Power of Next-Gen Unified Communications

8|23|17   |   04:46   |   (0) comments


How Huawei's unified communications and videoconferencing platforms are saving time and money and improving customer experience for users in Italy.
LRTV Documentaries
Phone Review: Moto Z2 Play

8|22|17   |   1:54   |   (0) comments


Light Reading Mobile Editor Dan Jones reviews the Moto Z2 Play, which he calls 'a nice modern Android phone with good battery life and one of the nicest cameras' he's seen. The Moto Z2 Play is a Gigabit LTE-ready phone, but we were not able to test speeds that fast in the US.
LRTV Documentaries
Three Gets Smart(y), BT Invokes Twitter – The Recap

8|21|17   |     |   (0) comments


From Telecoms.com, a recap of the week's telecoms talking points. It's been a week of gimmicks as Three tests out a pay-as-you-go sub-brand called Smarty; Comcast
Women in Comms Introduction Videos
VMWare VP Brings Women Up With Her

8|16|17   |   6:49   |   (1) comment


It's an art and a science to make mentorship, inclusive leadership, diversity and promotion of high-potential women work, says Honore' LaBourdette, vice president of Global Market Development at VMWare.
LRTV Documentaries
5G Spectrum Wars – The Recap

8|15|17   |   2:22   |   (0) comments


Service provider 3 has filed a lawsuit against Ofcom over 5G spectrum auction in the UK.
LRTV Custom TV
Say What? Facebook Unleashes AI Anarchy – The Recap

8|7|17   |     |   (0) comments


A recap of the week's talking points on Light Reading's sister site, telecoms.com. Facebook AI programmers had a bit of a brain-fade as they allowed one of its AI applications to invent its ...
Women in Comms Introduction Videos
Fujitsu's Women Band Together to Help Girls Do STEM

8|2|17   |   9:35   |   (1) comment


Supporting women both inside and outside of Fujitsu is a top priority of the telecom vendor. Yanbing Li, Fujitsu Network Communication's director of System Software Development & Delivery, shares why it's important, but why there's still a long road ahead.
LRTV Custom TV
If You're Not First, You're Last – The Recap

7|31|17   |   08:18   |   (1) comment


In case you missed it, Amazon's 1% stock increase helped Jeff Bezos dethrone Bill Gates as the richest man in the world. Also, Taiwanese electronics manufacturer
Women in Comms Introduction Videos
AT&T's Tech President Preps Workforce for the Future

7|26|17   |   5:47   |   (10) comments


AT&T is focused on the software-defined network of the future and is reskilling its workforce to get ready too, according to AT&T's President of Technology Development Melissa Arnoldi.
Women in Comms Introduction Videos
Cisco: Mentoring Critical to Attract & Retain Women

7|19|17   |   6:40   |   (1) comment


Liz Centoni, senior vice president and general manager of Cisco's Computing System Product Group, shares why mentoring in all its forms is important for women and what Cisco is doing that's made a difference for women in tech.
LRTV Custom TV
Gigabit LTE With Snapdragon 835

7|12|17   |     |   (1) comment


At an event in Wembley stadium, EE used its live network to demonstrate gigabit LTE using a Sony Xperia XZ Premium smartphone with a Qualcomm Snapdragon 835 chip.
LRTV Custom TV
Implementing Machine Intelligence With Guavus

7|12|17   |     |   (0) comments


Guavus unites big data and machine intelligence, enabling many of the the largest service providers in the world to save money and drive measureable revenue. Learn how applying Machine Intelligence substantially reduces operational costs and in many cases can eliminate subscriber impact, meaning a better subscriber experience and higher NPS.
Upcoming Live Events
September 28, 2017, Denver, CO
October 18, 2017, Colorado Convention Center - Denver, CO
November 1, 2017, The Royal Garden Hotel
November 1, 2017, The Montcalm Marble Arch
November 2, 2017, 8 Northumberland Avenue, London, UK
November 30, 2017, The Westin Times Square
All Upcoming Live Events
Infographics
With the mobile ecosystem becoming increasingly vulnerable to security threats, AdaptiveMobile has laid out some of the key considerations for the wireless community.
Hot Topics
Why AT&T May Dump Home Security Biz
Mari Silbey, Senior Editor, Cable/Video, 8/21/2017
Verizon & Friends Bust Through Gigabit LTE in the Lab
Dan Jones, Mobile Editor, 8/21/2017
WiCipedia: Dolly Babes, Manifesto Backlash & 'Brotastic' Failures
Eryn Leavens, Special Features & Copy Editor, 8/18/2017
Disney, iflix Team Up to Take Down Netflix
Aditya Kishore, Practice Leader, Video Transformation, Telco Transformation, 8/22/2017
AT&T Spreads Fiber & G.fast Wings
Alan Breznick, Cable/Video Practice Leader, Light Reading, 8/22/2017
Like Us on Facebook
Twitter Feed
Animals with Phones
Talk About a Custom-Made Workstation! Click Here
Proper ergonomics indeed.
Live Digital Audio

Understanding the full experience of women in technology requires starting at the collegiate level (or sooner) and studying the technologies women are involved with, company cultures they're part of and personal experiences of individuals.

During this WiC radio show, we will talk with Nicole Engelbert, the director of Research & Analysis for Ovum Technology and a 23-year telecom industry veteran, about her experiences and perspectives on women in tech. Engelbert covers infrastructure, applications and industries for Ovum, but she is also involved in the research firm's higher education team and has helped colleges and universities globally leverage technology as a strategy for improving recruitment, retention and graduation performance.

She will share her unique insight into the collegiate level, where women pursuing engineering and STEM-related degrees is dwindling. Engelbert will also reveal new, original Ovum research on the topics of artificial intelligence, the Internet of Things, security and augmented reality, as well as discuss what each of those technologies might mean for women in our field. As always, we'll also leave plenty of time to answer all your questions live on the air and chat board.