DOCSIS 4.0 引入 FDD 和 FDX 技術，支援 10Gbps 下行與 7Gbps 上行，為 10G 時代鋪路；多系統運營商（MSOs）需升級設備並採用自動化測試工具，以確保網路穩定與高效運行。

Successful Full Duplex DOCSIS (FDX) operation was based on the expectation that interference conditions would be more challenging and diversified, so mechanisms including interference group (IG) and transmission group (TG) management were included to minimize their impact and maintain DOCSIS fidelity.

2023年2月27日 · Comcast first tested FDX amplifiers in September 2022, demonstrating the ability to deliver symmetrical speeds across a complete network-to-home 10G loop, reflective of architecture that is inclusive of the vast majority of the Comcast network.

2023年2月27日 · Comcast first tested FDX amplifiers in September 2022, demonstrating the ability to deliver symmetrical speeds across a complete network-to-home 10G loop, reflective of architecture that is inclusive of the vast majority of the Comcast network.

2021年10月14日 · Our team implemented Full Duplex (FDX) DOCSIS 4.0 capabilities into a CMTS, or “virtualized” vCMTS, which is an essential component of our network and will be a critical link to delivering 10G. In order to complete the full connection, DOCSIS 3.1 modems were configured to operate in the FDX band.

Discover how DOCSIS 4.0 is revolutionizing cable networks with 10G-ready multi-gig speeds, lower latency, and enhanced security. Explore Extended Spectrum (ESD) and Full Duplex (FDX) paths, the challenges of network upgrades, and the competitive edge for cable operators in the race against fiber.

A powerful capability being added to the DOCSIS family at the heart of 10G is DOCSIS 4.0 Full Duplex (FDX), formerly known as DOCSIS 3.1FDX. FDX offers a massively expanded upstream spectrum and capacity on existing coaxial networks, introducing several key innovations that promise to carry the network long into the future.

2022年9月19日 · With the FDX Amplifier, a product that bakes in echo-cancellation techniques needed to operate an FDX band, Comcast says it can deploy FDX to HFC networks that have as many as six amplifiers...

Evaluations indicate increased spectral efficiency beyond the minimum performance requirements in the FDX specification. This paper will analyze the implied capacity limitations in the specs. A comparison to the measured performance is made which demonstrates exceeding these limits.

2022年1月13日 · Connected by Broadcom 10G technology, the modem test utilized the DOCSIS 4.0 FDX SoC device, which Comcast demonstrated in April 2021, to pair with two cable modem chips to deliver the breakthrough performance. These were successfully connected over a lab-based hybrid fiber-coaxial network to the vCMTS operating in DOCSIS 4.0 mode.