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DOCSIS

On the Path to 10G: CableLabs Publishes DOCSIS® 4.0 Specification

Doug Jones
Principal Architect

Mar 26, 2020

Today we are pleased to announce the release of the DOCSIS 4.0 specification, which incorporates both full duplex and extended spectrum capabilities. A part of the suite of technologies that support the 10G platform, DOCSIS 4.0 technology achieves a downstream speed of up to 10 Gbps (doubling the maximum download speed available with the implemented DOCSIS 3.1 technology) and an upstream speed of up to 6 Gbps - quadrupling what DOCSIS 3.1 technology could do. These speed increases build on the ample capacity deployed by cable operators today–with gigabit services nearly saturating the US cable footprint–and will enable cable broadband to deliver symmetric multigigabit services, with significantly enhanced upstream capabilities. As cable operators respond to the evolving connectivity needs of customers in our current public health crisis, remote work, learning, and health services stand to benefit from upstream broadband enhancements as DOCSIS 4.0 technology is deployed. 

Specification development started in August 2016. The full duplex capabilities were described in an October 2017 blog post, and now the extended spectrum capabilities have been completed as described in a September 2019 blog post.  

With these speed increases, we intend to change the consumer broadband industry by ushering in a new era of application development. Although speed numbers are important, broadband is about so much more than speed: it’s about changing the way we collaborate to make the world a better place. We have more devices, and our experiences increasingly rely on connectivity. Streaming video continues to explode. We’re video-chatting instead of making calls, we’re playing music off the web instead of our own media, and we’re playing games with people around the world. As technology continues to advance, we don’t know what the next trend will be, but we do know that the Internet will be central to whatever it is.

DOCSIS 4.0 Technology Increases Upstream Speed

A key piece of this story is the DOCSIS 4.0 multigigabit upstream capability, which greatly increases how fast information can be uploaded from your computer. Traditionally, businesses have required faster upload speeds to move large files around or to perform in-house web hosting. Now consumers are expecting more upstream speed as they work and learn from home. In addition, upstream speed is important to do things such as the following: 

  • Hard drive backups
  • Uploading videos and pictures
  • Cloud applications
  • Video conferencing
  • Smart homes and IoT devices
  • Home security cameras
  • Distance learning and visual classrooms

These applications are just the beginning. The higher speeds available with DOCSIS 4.0 technology will serve as a catalyst for the next wave of innovations.

The 10G Platform

The DOCSIS 4.0 specification takes to heart the four pillars of the 10G platform initiative. Below are quick descriptions of these pillars, and links to more information. 

  • Speed is addressed in this blog post. Multigigabit symmetric speeds raise the bar for consumer broadband.
  • Lower latency was incorporated into the DOCSIS 3.1 specification and has been brought forward into the DOCSIS 4.0 specification. Lower latency will provide a better experience for consumers on applications such as online gaming and multimedia.
  • Increased security comes with every new DOCSIS release. Our security experts are constantly monitoring network threats to the network and taking measures to increase the confidentiality, integrity and availability of communications.
  • Higher reliability must be planned into the network and DOCSIS technology takes this to a new level by including methods to proactively identify and address network issues before consumers are even aware of them.

CableLabs continually makes advances in these areas and others, bringing state-of-the-art breakthroughs to cable broadband. 

Mapping Out the Next Steps for DOCSIS Technology 

Delivery of the specification is the first step of a three-part DOCSIS lifecycle. The second step includes interoperability events and the final step is certification, which will be discussed in future blog posts. These three steps—specification, interoperability and certification—have been part of the DOCSIS process for over 20 years and constitute a time-proven method to deliver high-speed, low-cost, interoperable cable modems to consumers. 

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Wired

Preparations for Full Duplex DOCSIS® Technology are Marching Along

Doug Jones
Principal Architect

Mar 7, 2019

Built on the successful completion of CableLabs’ DOCSIS 3.1 specification, Full Duplex (FDX) DOCSIS® technology (now a part of DOCSIS 4.0 technology) is a key component of the 10G platform that will significantly elevate the level of services available to consumers using existing cable broadband networks. With FDX DOCSIS technology (now a part of DOCSIS 4.0 technology), the same frequencies are simultaneously used for both upstream and downstream traffic, virtually greatly increasing the capacity of the coaxial cable. More capacity means lower latency and speeds of up to 10 Gbps for downstream traffic and up to 6 Gbps for upstream traffic. Cable broadband users will be much more satisfied with services, leading to greater customer retention and the ability to attract new customers.

Field Testing Analysis

In the past year, CableLabs has thoroughly scrutinized FDX DOCSIS technology (now a part of DOCSIS 4.0 technology) in the field. Test equipment and engineers have flown around North America performing analysis on real cable broadband networks, including both a newly constructed plant and coaxial cable that was installed back while I was in college (that coax is well past voting age…). Volumes of data were collected, such as technical parameters on various configurations and various weather conditions: data from real networks in the real world.

And it works. The testing results were positive and in line with expectations, and products built to the specifications are expected to deliver the higher symmetrical bit rates associated with full duplex operation. Now, coaxial cable networks won’t be a limiting factor in getting to full duplex and the next generation of broadband services.

Now that CableLabs has developed FDX DOCSIS specifications (now a part of DOCSIS 4.0 technology), members can move forward with this exciting technology. Members can further benefit from the Kyrio testing services that provide all the engineering expertise and lab equipment needed for testing FDX DOCSIS (now a part of DOCSIS 4.0 technology). All the operator has to do is identify network segments where the work is to be performed.

What’s Coming in 2019

Getting back to the lab (which is a lot dryer and warmer than some of the outside plant scenarios where CableLabs has worked), CableLabs is:

  • Hosting lab activities to support the development and interoperability of FDX DOCSIS (now a part of DOCSIS 4.0 technology) products
  • Bringing back important discoveries from the field testing into the labs to support testing in real-world situations and scenarios.
  • Building the lab infrastructure needed to rigorously analyze performance and reliability in a variety of configurations

CableLabs and the cable industry are continuing to advance cutting-edge developments in cable broadband networks to remain ahead of consumer demand. The focus is on developing innovative network technologies, as well as defining optimal network architectures that provide the necessary capacity and performance in each network segment for multi-gigabit services today and in the future.

You can learn more about Full Duplex DOCSIS technology (now a part of DOCSIS 4.0 technology) and the 10G platform by clicking below. 


Learn More About 10G
 

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Events

CableLabs Hosting a Free Full Duplex DOCSIS® Technology Seminar

Doug Jones
Principal Architect

Mar 13, 2018

CableLabs is hosting a free Full Duplex (FDX) DOCSIS® technology (now DOCSIS 4.0 technology) seminar , April 17–18, 2018 that will be attended by both cable operators and DOCSIS suppliers. The seminar will take place at a private events center to provide attendees with a comfortable and professional setting to learn all about Full Duplex DOCSIS technology (now DOCSIS 4.0 technology).

Scheduled speakers will be technologists who developed the FDX DOCSIS (now DOCSIS 4.0 technology) specifications, . Most have been involved with DOCSIS technology since the beginning, all are accomplished speakers who possess a wealth of knowledge to share not only about FDX DOCSIS (now DOCSIS 4.0 technology) but also about how the technology integrates into the family of DOCSIS generations.

FDX DOCSIS 3.1 technology (now DOCSIS 4.0 technology) allows cable operators to offer symmetric gigabit-speed data services over their existing Hybrid Fiber/Coax (HFC) networks, building on the core DOCSIS 3.1 orthogonal frequency-division multiplexing (OFDM)/orthogonal frequency-division multiple access (OFDMA) technology. This additional set of features significantly increases upstream capacity and allows for the same spectrum to be simultaneously used for both downstream and upstream.

The technology seminar will cover a wide range of topics, including:

  • The physical layer: The physical layer topic includes how both OFDM and OFDMA have been extended to allow full duplex operation. This also includes how FDX DOCSIS (now DOCSIS 4.0 technology) fits into the channel plan, and how the system is expected to operate.
  • The Media Access Control (MAC) layer: This topic includes both how the cable modem termination system (CMTS) manages the full duplex spectrum and how today’s FDX (now DOCSIS 4.0 technology) modems initialize and communicate with the CMTS for full duplex operation.
  • Link Budgets and System Performance: This topic will discuss how to manage both signal levels and loss throughout the system in order to maintain peak operating performance.
  • FDX DOCSIS support of existing DOCSIS modems: This topic concerns how FDX DOCSIS (now DOCSIS 4.0 technology) modems will be tested for backward compatibility with earlier versions of DOCSIS modems; they will all operate on the same cable plant with no need to upgrade older modems.
  • Fiber Node changes: What will change in the Fiber Node, which now supports a Distributed Access Architecture (DAA) solution to distribute part (or all) of the CMTS to the fiber node?
  • Node+0 Tips: These tips and considerations will focus on Node+0 (passive coax) plant construction to support FDX DOCSIS (now DOCSIS 4.0 technology).

The technology seminar has been designed to foster interactive discussion with the audience. FDX DOCSIS (now DOCSIS 4.0 technology) is an extension of the DOCSIS 3.1 technology and now involves the HFC network to create a system that offers symmetric capacity. Presentations will offer critical insights into these aspects of the architecture and technology. Attendees will come away with a greater appreciation and understanding of FDX DOCSIS’s (now DOCSIS 4.0 technology) underlying mechanisms.

Seminar Details

The FDX DOCSIS technology (now DOCSIS 4.0 technology) seminar is free to attend and is open to all CableLabs members and DOCSIS NDA suppliers. The audience is intended to be composed of technology leaders involved with the early deployments of DOCSIS, including not only the DOCSIS engineers but also experts in outside plant and construction as FDX DOCSIS (now DOCSIS 4.0 technology) uses a Node+0 HFC network.

This technology seminar overlaps with an FDX DOCSIS (now DOCSIS 4.0 technology) interop being held at CableLabs the week of April 16. All CableLabs members and suppliers participating in the interop have the opportunity to tour the interop and witness FDX DOCSIS technology (now DOCSIS 4.0 technology) in operation, viewing—for perhaps the first time—the same spectrum carrying simultaneous upstream and downstream traffic.

With the CableLabs membership spanning five continents, the seminar will provide a unique opportunity for networking, as well as connecting or reconnecting with colleagues involved with the introduction of new DOCSIS technology. The seminar will offer a diverse set of deployment scenarios, and the discussions will include how FDX DOCSIS (now DOCSIS 4.0 technology) can support the needs of cable operators.


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Technology

Introduction to Proactive Network Maintenance (PNM): The Importance of Broadband

Doug Jones
Principal Architect

Aug 24, 2017

This is the introduction for our upcoming series on Proactive Network Maintenance (PNM).

The advent of the Internet has had a profound impact on American life. Broadband is a foundation for economic growth, job creation, global competitiveness and a better way of life. The internet is enabling entire new industries and unlocking vast new possibilities for existing ones. It is changing how we educate children, deliver health care, manage energy, ensure public safety, engage government and access, organize and disseminate knowledge.

There is a lot riding on broadband service which places a focus on customer service; to create both a faster and more reliable broadband experience that delight customers. Recent technological advancements in systems and solutions, as well as agile development, have enabled new cloud-based tools to enhance customer experience.

Over the past decade, CableLabs has been inventing and refining tools to improve the experience of broadband. CableLabs is providing both specifications and reference designs to interested parties to improve how customers experience their broadband service. Proactive Network Maintenance (PNM) is one of these innovations.

What is Proactive Network Maintenance and Why Should You Care?

Proactive network maintenance (PNM) is a revolutionary philosophy. Unlike predictive, or preventive maintenance, proactive maintenance depends on a constant and rigorous inspection of the network to look for the causes of a failure, before that failure occurs, and not treating network failures as routine or normal. PNM is about detecting impending failure conditions followed by remediation before problems become evident to users.

In 2008 the first instantiation of PNM was pioneered at CableLabs. This powerful innovation used information available in each cable modem and mathematically analyzed it to identify impairments in the coax portion of the cable network. From this time forward, every cable modem in the network is a troubleshooting device and could be used as a preventive diagnostic tool.

This is important when trying to track down transient issues related to the time of day, temperature, and other environmental variables, which can play a huge role in the performance of the cable system. With transient issues, it is important to have sensors continually monitoring the network. Since then, with improvements in technology, more sophisticated tools have been added giving operators unprecedented amounts of information about the state of the network.

Problems are solved quickly and efficiently because we can pinpoint where the problems are. Technicians like PNM because they become empowered to find and fix issues. An impairment originating from within a customer’s home can be dispatched to a service technician. While impairments originating on the cable plant itself can be dispatched to line technicians. Customer service agents also like the tools because they create actionable service requests. Lastly, impairments that can be attributed to headend alignment issues can be routed to a headend technician. All of this can be done before the customer is even aware there is a problem!

So, what does CableLabs have to do with all this?

The PNM project continues to innovate. Because of the success of PNM for the cable network, capabilities have been added to investigate in-home coax, WiFi and soon fiber optic networks.   Monitoring is key, and by using powerful cloud-based predictive algorithms and analytics, networks can be monitored 24 x 7 to provide insights, follow trends and detect important clues with the goal to identify, diagnose and fix issues before customers notice any impact.

CableLabs provides a toolkit of technical capabilities and reference designs that interested parties can use to create and customize tools fitting specific business needs. Operators can get started with reference designs, build expertise and their own solutions, and integrate the tools into their own systems. In addition, suppliers have licensed the technology and are creating a turn-key solution that operators can choose to work with.

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In my upcoming series, I will cover DOCSIS PNM, MoCA PNM, Optical PNM, Common Collection Framework and explore in greater depth how PNM enhances the customer experience. Be sure to subscribe to our blog to find out more.

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