Optimizing the 10G Transition to Full-Duplex DOCSIS 4.0 (2020)

By Richard S Prodan, Ph.D., Comcast Cable

Comcast has been deploying optical fiber deeper into its infrastructure, in “Node + 0” /, “N+0” mid-split configurations to support the ever-increasing demand for higher speeds and throughput to customers. The first step was the transition from traditional Node + N sub-split networks, with 5 to 42 MHz upstream and1002 MHz downstream bandwidth, to current mid-split Node + 0 networks with 5 to 85 MHz upstream and 1218 MHz downstream bandwidth.

Future Node + 0 networks will transition to Full-Duplex (FDX) DOCSIS, to significantly increase the upstream bandwidth to multi-gigabit speeds with high throughput. This will not be accomplished in one giant leap, but rather a transition from mid-split to high-split networks. The first step will be a shift to a 5to 204 MHz upstream and 1218 MHz downstream bandwidth, supporting a 1 Gbps upstream tier and multi-Gbps downstream. As demand for multi-gigabit services grows, FDX can be deployed, with overlapping bidirectional spectrum from 108 to 204 MHz that eventually increases up to the full 108 to684 MHz FDX limit plus legacy DOCSIS 3.0 to the 1002 MHz limit and legacy DOCSIS 3.1to the 1218MHz limit.

This paper will discuss considerations that need to be addressed in the transition. Scenarios will be described, as well as some node and modem architectures that provide flexible signal support to optimize the end-to-end performance, toward 10G Full-Duplex operation of the network.

By clicking the "Download Paper" button, you are agreeing to our terms and conditions.

Similar Papers

Full Duplex DOCSIS over Active (N+X) Cable Networks
By Werner Coomans, Ph.D., Nokia Bell Labs; Rex Coldren, Nokia/Gainspeed
Full Duplex DOCSIS PHY Layer Design and Analysis for the Fiber Deep Architecture
By Richard S. Prodan, Ph.D., Broadcom Limited
Roaring into the ‘20s with 10G
By Dr. Robert Howald, Robert Thompson, Sebnem Ozer, Daniel Rice & Larry Wolcott, Comcast; Dr. Tom Cloonan, Dr. Ruth Cloonan & John Ulm, CommScope; Jan Ariesen, Technetix
What is 10G – The Technology Foundation
By Dr. Robert Howald, Dr. Sebnem Ozer, Robert Thompson, Saif Rahman, Dr. Richard Prodan & Jorge Salinger, Comcast
Impact of Access Environment in Cable’s Digital Coherent System – Coexistence and Full Duplex Coherent Optics
By Zhensheng (Steve) Jia, Ph.D., L. Alberto Campos, Ph.D., Mu Xu, Ph.D., Haipeng Zhang, Ph.D., Jing Wang, Ph.D. & Curtis Knittle, Ph.D., CableLabs
Full Duplex DOCSIS
By John T. Chapman and Hang Jin, Cisco
Blueprint for 3 GHz, 25 Gbps DOCSIS
By John T Chapman & Hang Jin, Cisco Systems; Thushara Hewavithana, Intel Corporation; Rainer Hillermeier, Qorvo
DOCSIS 4.0 Network Migration Made Easy
By Ayham Al-Banna, Ph.D. & Tom Cloonan, Ph.D., CommScope
Full Duplex DOCSIS Technology over HFC Networks
By Belal Hamzeh, CableLabs, Inc.
Echo Cancellation Techniques for Supporting Full Duplex DOCSIS
By Hang Jin & John Chapman, Cisco Systems
More Results >>