The DOCSIS3.1: the practical realities of implementation

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Date: 22-May-2015
No. of pages: 30
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DOCSIS3.1 access is nearly 2 years away for end users, but cable operators should begin preparing to deploy it because the capacity and maximum speed benefits will be significant.

Cable operators need more capacity in their networks to cope with the growing volume of downstream and upstream traffic. In addition, the threat of infrastructure competition from FTTH players will force them to increase maximum upload and download speed service tiers. DOCSIS3.1 will enable cable operators to boost capacity and maximum speeds. This report analyses the practical realities of DOCSIS3.1 and what will be required to implement the technology.

This Strategy Report:


  • provides recommendations for cable operators on what they will need to do to roll out DOCSIS3.1 and what the best possible roll-out strategy might be

  • assesses the costs associated with rolling out DOCSIS3.1

  • analyses the capacity and speed benefits of the technology

  • provides recommendations for telcos that are seeking to compete with DOCSIS3.1 roll-outs.

The DOCSIS3.1: the practical realities of implementation

Table of Contents

About this report
Executive summary
The increasing volume of data traffic and the availability of higher speeds from competitors are driving cable operators to upgrade networks
DOCSIS3.1 upgrade strategies differ in terms of the capacity boost and maximum speed provided as well as cost and time to market
Recommendations

Potential Deployment Scenarios
DOCSIS3.1 can be implemented in several ways, but might not necessarily be an operator’s next upgrade step
Operators have various options when changing their frequencies and implementing DOCSIS3.1

Maximum Speed And Capacity Benefits
DOCSIS3.1 provides capacity and maximum speed benefits through the use of higher-order QAM and better forward error correction
DOCSIS3.1 can boost maximum download and upload speeds, but is not necessary for gigabit access nor to surpass many incumbents
Opportunities for refarming downstream spectrum make using existing frequencies for DOCSIS3.1 a viable strategy
Upstream capacity will grow considerably in all DOCSIS3.1 deployment scenarios, but symmetrical gigabit access will still be problematic
Moving to remote PHY brings further capacity benefits, although marginal gains begin to decline

Implementation Costs And Timelines
Deployment timing is a greater challenge than cost for DOCSIS3.1 modems
Deployment timing is also the greater challenge for DOCSIS3.1 headend devices
DOCSIS3.1 modem and CMTS/CCAP costs are not insignificant for most emerging market operators
Upstream frequency upgrades may require the replacement of the whole amplifier
1.2GHz downstream frequency upgrades present significant additional challenges
The existence of MoCA might require an engineer installation when moving to 1.2GHz
Moving to 204MHz on the upstream with DOCSIS3.1 introduces significant logistical challenges

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