& cplSiteName &
Video

The End of Docsis

4/28/2011
50%
50%
Newest First  |  Oldest First  |  Threaded View        ADD A COMMENT
Page 1 / 2   >   >>
lightreader100
50%
50%
lightreader100,
User Rank: Light Beer
12/5/2012 | 5:06:31 PM
re: The End of Docsis


very insightful point of view.  this approach could take us to the next level

techgeneral
50%
50%
techgeneral,
User Rank: Light Beer
12/5/2012 | 5:06:30 PM
re: The End of Docsis


Excellent interview.  What he's proposing is a fundamental shift in how services are delivered...a very radical & expensive notion.  It's fun to use GOOG as the example of your world view, but it's a bit of revisionist history; they were trying to find quality research papers...world domination came later.  Also, there's a little problem called content.  Ad-supported search results (you know urls that contain the keywords you're searching), is a fundamentally different experience than the QoS of full motion video.  Seems wasteful to advocate storing (caching) large amounts of copyrighted content through the network, so users can access it with a couple of mouse clicks.  I like the idea of brokering access, but can't seem to get my head around how it all works; I'm imagining giant data centers everywhere.  Maybe I'm missing something?

Duh!
50%
50%
Duh!,
User Rank: Light Sabre
12/5/2012 | 5:06:30 PM
re: The End of Docsis


He clearly has a grand vision, but seems to conflate a lot of issues that I think of as disjoint.  


The 6MHz channel plan, and the 50 MHz split has clearly become a handicap.    I can think of several possible approaches to better utilize the usable bandwidth of fiber-fed coax.   The big question is how to transition to any such scheme without massive breakage.


The need for caching is apparent, not just for the reasons he's given, but also because we have reached a tipping point in TCP performance gains.  TCP goodput in congestion avoidance is roughly proportional to sqrt(RTT)/packet loss rate.  As bit rates increase on the access and in the backbone, the RTT term ceases to be dominated by serialization/deserialization delays and instead becomes dominated by prop delay.  As a result, investment in moving content closer to the user starts to yield better performance gains than comparable investment in higher speeds.   What is not clear to me is whether this caching needs to be an integral part of the MSO's network, or layered over and collocated (as done now with Akamai and Limelight). 


Finally, I'm wondering when we're going to reach the tipping point with ad-supported models.  It seems to me that consumers are becoming saturated with too many messages, frustrated by the insatiable demands on their attention and concerned about invasions of privacy.   The news business' move toward pay walls may be the canary in the coal mine.  If that is the case, I'd suggest that the providing the dumb pipe, plus usage based charging plus access control plus billing and customer care form a stronger long-term business model.

paolo.franzoi
50%
50%
paolo.franzoi,
User Rank: Light Beer
12/5/2012 | 5:06:29 PM
re: The End of Docsis


 


Then the other issue with TCP is assymmetry.  The upstream to downstream ratio of more than about 8:1 causes slowdowns in the downstream (there are lots of papers out there on this).


seven

Duh!
50%
50%
Duh!,
User Rank: Light Sabre
12/5/2012 | 5:06:29 PM
re: The End of Docsis


Mr. Yassini covered the video/UDP case.

paolo.franzoi
50%
50%
paolo.franzoi,
User Rank: Light Beer
12/5/2012 | 5:06:29 PM
re: The End of Docsis


 


Duh,


I agree with the need for caching, but I think we need to be thinking about UDP not TCP for video.


seven


 

RBR
50%
50%
RBR,
User Rank: Light Beer
12/5/2012 | 5:06:28 PM
re: The End of Docsis

Excellent statement Rouzbeh and well articulated as always. 

We are migrating from an era where Internet Access was simply a product addition on an HFC network into one of all data; then make that the biggest and best it can be.  Services then become just an application on that network.  MetaSwitch said it best recently:  “We need to become the FedEx and UPS of data package delivery, who cares about the bits inside.”

We were reaching for that end in 802.14 but were not able to meet the timely demands of the Cable Industry and ceded our efforts.  DOCSIS was an outstanding solution for the industry’s needs and Cable Labs was second to none in offering the industry revenue generating solutions.  Hat’s off to what DOCSIS created!  Underlying principles return though as we see in the advent of Carrier Ethernet and embedded CORE router controls such as Cisco’s.  The old battles of flow management, QoS, concatenation and fragmentation remain though our channel model performances are well settled.

Be data first and watch your revenue models transform your view of business. 


Thanks Rouzbeh, y’all were a great set of mentors.  It continues to be a fun ride!

Duh!
50%
50%
Duh!,
User Rank: Light Sabre
12/5/2012 | 5:06:28 PM
re: The End of Docsis


Yup.  That comes in the category of the 50 MHz split being a handicap.  At least the TI Cable Modem ASICs (don't remember Broadcom having also picked this up) support ACK decimation, which significantly mitigates the problem. 

comtech3
50%
50%
comtech3,
User Rank: Light Beer
12/5/2012 | 5:06:24 PM
re: The End of Docsis


It is nice to have a vision about next generation cable architectural approach,but that's what it is, a vision.This gentle has never spent a day in the field is telling us this nonsense.The current HFC architecture utilizes a sub-split.This means using bands of frequencies from 8MHz to 862MHz.All prone to noise and interference,especially in the sub-band.Now is this gentleman proposing an all IP  data based transmission of services no matter what it is,be it voice,video, or plain internet traffic? I can see the cable systems going down with all those retransmissions when the data is corrupted in transit to their destination.To have this kind of service, the cable companies would have to change their infrastructure to all fiber where there would be less chance of noise being generated not only from ingress,but from amplifier generated noise.Even with an all fiber infrastructure, there is a chance of retransmission caused by LASER misalignment and delays caused by light scattering.My Yassini's proposal may seem noble on the surface,but he needs to see what it is like in the field and not in a vacuum!

bahlmann
50%
50%
bahlmann,
User Rank: Light Beer
12/5/2012 | 5:06:24 PM
re: The End of Docsis


Like any other technology it has its uses, but its not the answer, and I'd agrue there are more problems with it operationally and legally.


Call it a conspiricy theory, is just the precursor to the operators wanting to store everying at the network's edge. However, what they call the network's edge is where its "gray" - is it atop the fiber node or near the Internet NAPs. If the latter, the size and extent of caching will begin to look more like archiving rather than caching.


I agree, that DOCSIS is at best an iterim step. But lets face it, DSL and any other fiber/copper, RF, etc. combination is too. Problem is, will the next migration end up costing cable operators more than this interim step - or has fiber now become so cheap that it is hyper competitive to quick and dirty coax.


While cable's headends look more like an IP network these days, migrating out of DOCSIS or the use of coax would be painful and very expensive. Particularly since the it would render a majority of their headend and plant technicians obsolete. Thus, I'm afraid cable is stuck with coax and some flavor of RF (not IP) for the unforesable future - it won't happen in my lifetime.

Page 1 / 2   >   >>
Light Reading’s Upskill U is a FREE, interactive, online educational resource that delivers must-have education on themes that relate to the overall business transformation taking place in the communications industry.
NEXT COURSE
Wednesday, September 14, 1:00PM EDT
What Is Agile?
Kent J. McDonald, Product Owner, Agile Alliance
UPCOMING COURSE SCHEDULE
Friday, September 16, 1:00PM EDT
How to Implement Agile
,
Wednesday, September 21, 1:00PM EDT
What Is DevOps?
Colin Kincaid, CTO, Service Provider, Cisco
Friday, September 23, 1:00PM EDT
How to Implement DevOps
,
in association with:
From The Founder
Light Reading today starts a new voyage as part of a larger Enterprise.
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.
LRTV Custom TV
F5 Virtual Network Function Integrations With Partner Orchestration Platform

8|24|16   |   6:38   |   (0) comments


F5's Kishore Patnam, product manager for F5's service provider solutions, discusses why service providers are moving towards virtualization and how his clients are utilizing F5's solutions.
Between the CEOs
CEO Chat: Intel's Alexis Black Bjorlin

8|17|16   |   06:23   |   (0) comments


Join us for an in-depth interview between Steve Saunders of Light Reading and Alexis Black Bjorlin of Intel as they discuss the release of the company's Silicon Photonics platform, its performance, long-term prospects, customer expectations and much more.
Telecom Innovators Video Showcase
Accelerating Telecom Digital Transformation With Nominum DNS

8|1|16   |   12:04   |   (0) comments


Light Reading's Steve Saunders gets an update from Nominum CEO Gary Messiana on how his company is helping carriers on the digital transformation journey.
LRTV Custom TV
Reinventing Operations for a Virtual, Software-Defined World

7|28|16   |   5:23   |   (0) comments


Heavy Reading Senior Analyst Jim Hodges speaks with Accenture's Larry Socher and Matt Anderson about what service providers must do to transform their business to get the benefits of SDN and NFV including: leveraging DevOps, introducing real-time OSS and implementing analytics.
Women in Comms Introduction Videos
Fujitsu Sales Leader Shares Lessons Learned

7|27|16   |   5:12   |   (1) comment


As Fujitsu's only female sales leader, Annie Bogue knows the importance of asking for what you want, being flexible (she's been relocated five times), keeping a meticulous calendar, 'leaning in,' working harder than everyone else around you, being aware and more.
Telecom Innovators Video Showcase
VeEX Test & Measurement Solutions

7|25|16   |   08:57   |   (0) comments


Cyrille Morelle, president and CEO of VeEX Inc., talks test and measurement with Light Reading's Steve Saunders at BCE 2016. This includes innovative products such as VeSion Cloud-Based platform for network monitoring; MTTplus Modular Test platform for Access, Business, Carrier Ethernet, Transport and Core services; and OPX-BOX+ for Fiber Optics.
LRTV Custom TV
VeEX: Live From BCE 2016

7|25|16   |   03:20   |   (0) comments


VeEX's Senior Director of Business Development, Perry Romano, explains how VeEX provides tools to help install, maintain, monitor and manage network infrastructure efficiently and effectively. The portfolio of products on display include the RXT-6000, MTTplus and TX300s.
LRTV Custom TV
Real-Time Telemetry & Analytics for Intelligent SDN Orchestration

7|25|16   |   03:09   |   (0) comments


Packet Design CEO Scott Sherwood discusses how real-time network telemetry and analytics are enabling a new breed of SDN orchestration applications.
From the Founder
The Russo Report: Driving Disruption

7|25|16   |   07:44   |   (2) comments


In the first episode of a four-part series, Light Reading Founder and CEO Steve Saunders and Calix President and CEO Carl Russo drive around town discussing the disruptive mega-changes in the communications industry and where hope lies for service providers to meet the escalating demands of the cloud.
LRTV Custom TV
NetScout: Maximizing Enterprise Cloud for Digital Transformation

7|20|16   |   04:53   |   (0) comments


Light Reading Editor Mitch Wagner talks to NetScout CMO Jim McNiel about maximizing the benefits of enterprise cloud and digital transformation while minimizing potential pitfalls with a proper monitoring and instrumentation strategy.
Women in Comms Introduction Videos
Ciena's VP Offers a Career Crash Course

7|20|16   |   4:14   |   (2) comments


How did Ciena's Vice President of Sales, Angela Finn, carve out her career path? Simple, she tells WiC. She stayed true to her company, customers and principles. She shares her advice for women on how to be authentic and credible, as well as for companies that want to make a real change to their culture and practices.
LRTV Custom TV
NFV in 2016: Part 2 – Climbing the Virtualization Maturity Curve

7|19|16   |   06:56   |   (0) comments


Many of the initial use case implementations are single-vendor and self-contained. The industry is still climbing the virtualization maturity curve, needing further clarity and stability in the NFV infrastructure (NFVi) and greater availability and choice of virtualized network functions (VNFs). Interoperability between NFVis and VNFs from different vendors ...
Upcoming Live Events
September 13-14, 2016, The Curtis Hotel, Denver, CO
November 3, 2016, The Montcalm Marble Arch, London
November 30, 2016, The Westin Times Square, New York City
December 1, 2016, The Westin Times Square, New York, NY
December 6-8, 2016, The Westin Excelsior, Rome
May 16-17, 2017, Austin Convention Center, Austin, TX
All Upcoming Live Events
Infographics
Five of the Top 10 most targeted countries in Check Point Software Technologies' global Malware & Threat Index for Q1 2016 are in Africa.
Hot Topics
Cisco Developing 'Monica' Digital Assistant
Mitch Wagner, West Coast Bureau Chief, Light Reading, 8/22/2016
Cisco Throws 5,500 Overboard on Cruise to Richer Waters
Mitch Wagner, West Coast Bureau Chief, Light Reading, 8/17/2016
VoLTE Can Drive 4G Small Cells Adoption
Ravi Narayanan, Senior Analyst – Cloud & Next Generation Mobile Networks, Heavy Reading, 8/18/2016
Rocket Fiber Lights Up Detroit With Gigabit
Elizabeth Miller Coyne, Managing Editor, 8/22/2016
Rumors of a Sprint/T-Mobile Merger Again
Dan Jones, Mobile Editor, 8/17/2016
Like Us on Facebook
Twitter Feed
BETWEEN THE CEOs - Executive Interviews
Join us for an in-depth interview between Steve Saunders of Light Reading and Alexis Black Bjorlin of Intel as they discuss the release of the company's Silicon Photonics platform, its performance, long-term prospects, customer expectations and much more.
There's no question that, come 2020, 5G technology will turn the world's conception of what mobile networking is on its head. Within the world of 5G development, Dr. ...
Animals with Phones
Live Digital Audio

Bridging the tech skills gap is a major challenge for service providers and suppliers alike today – and the challenge is two-fold when it comes to increasing the number of women in the comms space. Level 3 Communications has made it a priority to overcome both challenges by implementing several unique programs focused on building the right candidates from within – in addition to filling the funnel by supporting STEM and other education programs. During this radio show, you’ll learn about these programs from Mary Beth McGrath, SVP of Global Talent Management at Level 3, and the best ways to bridge your own skills gap so that you are motivated and equipped for change. Plus you’ll have the chance to ask Mary Beth your questions live on the air.