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DOCSIS® 4.0 Technology

Formerly Full Duplex DOCSIS technology, DOCSIS 4.0 technology is the result of applying emerging techniques from wireless networks to achieve a breakthrough increase in DOCSIS upstream speeds.

Highlights Initial cable broadband technology, high speed internet access Added voice over IP service, gaming, streaming Higher upstream speed, capacity for symmetric services Greatly enhances capacity, channel bonding, IPv6 Capacity and efficiency progression, OFDM, wideband channel Symmetrical streaming and increased upload speeds
Downstream Capacity 40 Mbps 40 Mbps 40 Mbps 1 Gbps 10 Gbps 10 Gbps
Upstream Capacity 10 Mbps 10 Mbps 30 Mbps 100 Mbps 1-2 Gbps 10 Gbps
Production Date 1996 1999 2001 2006 2013 2017


What is DOCSIS® 4.0 technology?

Now DOCSIS® 4.0 technology is an extension of the DOCSIS 3.1 specifications that will significantly increase upstream capacity and enable symmetric multi-Gbps services over existing HFC networks. DOCSIS 4.0 technology builds on the successful completion of the DOCSIS 3.1 specifications, which will make 10 Gbps downstream and 1 Gbps upstream broadband speeds a reality.

How did DOCSIS 4.0 evolve?

CableLabs has a rich involvement with academic institutions in the USA and around the world. As part of CableLabs engagement with academia, we were following ongoing research in the wireless industry and identified wireless full duplex as a technology that could be applied to cable networks, and most importantly, leverages the existing investment in HFC infrastructure. CableLabs leveraged the FDX communication concept, and developed a solution that is ideal for the HFC network architecture and characteristics.

How does DOCSIS 4.0 work?

By leveraging the combination of DOCSIS 3.1 technology, passive HFC network characteristics, self-interference cancellation technology and intelligent scheduling, CableLabs has developed a solution that enables full duplex communications over the HFC network while still maintaining backward compatibility with previous generations of DOCSIS technology.

In full duplex communication, the upstream and downstream traffic concurrently use the same spectrum, doubling the efficiency of spectrum use. With current DOCSIS networks and TDD (Time Division Duplexing), spectrum is split between the upstream and downstream. Full Duplex communication enables upstream and downstream traffic to efficiently use the same spectrum at the same time.

How does DOCSIS 4.0 benefit consumers?

Full Duplex DOCSIS technology enables Multi-Gbps symmetrical services possible over the existing HFC networks thus supporting future applications with high upstream traffic demand such as sensor networks, virtual reality, smart cars, the tactile internet and new applications not yet imagined.

Full Duplex DOCSIS technology can be introduced with no disruption to the consumer as it is backward compatible with previous DOCSIS technologies and works with existing HFC infrastructure.

How is CableLabs and the industry cooperating to develop DOCSIS 4.0?
  • In June 2016, Full Duplex DOCSIS 3.1 transitioned from an innovation project to an industry-wide R&D effort led by CableLabs, where vendors and member cable operators of CableLabs can collaborate on developing Full Duplex DOCSIS 3.1 specifications
  • CableLabs estimates that the specifications will be released by late 2017.
  • Cisco has contributed a silicon reference design to accelerate the technology’s development and eventual deployment.
Where can I find DOCSIS 3.1 resources?

DOCSIS 3.1 information and resources can be found in its new home URL: