ANSI SCTE 235:2017 pdf download.Operational Practice for the Coexistence of DOCSIS 3.1 Signals and MoCA Signals in the Home Environment.
1.1. Executive Summary
DOCSIS 3.1 signals and MoCA’ signals can both exist at frequencies above I GHz. This operational practice explains how operators can use frequencies above I GHz for both types of services. MoCA versions 1.1 and 2.0 are included in the analysis. The three cases of how these signals may coexist are:
• Overlapping
• Adjacent
• Non-overlapping
This document provides many recommendations for operational best practices for the coexistence between DOCSIS 3.1 signals and MoCA signals. Each recommendation is preceded with the text “Guideline” and is numbered. The guidelines are summarized in Section 12.
This document demonstrates that the hybrid fiber coax (HFC) network performance impacts the calculations. The initial conclusions are conservative in light of the ability of DOCSIS 3.1 technology to adapt to real-world environments. Final calculations are based on the selection of optimal DOCSIS 3.1 bit loading, which allows adequate performance with less isolation.
This document explains the need for sufficient isolation and suggests the proper location and required performance of filters. Filters are necessary in most architectures to:
• Prevent MoCA signals from one residence from bridging to a nearby residence
• Prevent overload of DOCSIS receivers and MoCA receivers
Filter locations can be at the consumer premises equipment (CPE) and/or at the point of entry (PoE). Finally, home-run vs. loop-through architectures are explained, with the final recommendation that non- overlapping channels and home-run architectures he used whenever possible.
This operational practice applies to any network that contains DOCSIS downstream signals at frequencies greater than I GHz and has MoCA signals in the premises. The calculations are valid for DOCSIS 3.1 and for MoCA 1.1 and 2.0 single channel operation.
1.3. Benefits
The recommendations in this document are designed to assure that the DOCSIS networks and MoCA networks perform with minimal impact on each other. If these recommendations are not followed, significant performance degradation could occur to either network and, in some scenarios, one or both networks could completely fail to operate.
1.4. Intended Audience
This operational practice is intended to be used by network designers, cable industry technical personnel, equipment designers and others who have an interest in coexistence of DOCSIS 3.1 signals and MoCA signals above I GHz to assure that proper frequencies are selected and that proper filters are specified to be installed.
1.5. Areas for Further Investigation or to be Added in Future Versions
Additional documents could:
• Analyze MoCA 2.5 signals
• Provide recommendations for filters in mid-split systems
• Coexistence of DOCSIS 3.1 technology with other home networking technologies such as G.hn, HomePlug. etc.ANSI SCTE 235 pdf download.