Call : (+91) 968636 4243
Mail : info@EncartaLabs.com
EncartaLabs

DOCSIS - Essentials

( Duration: 2 Days )

This DOCSIS Essentials training course covers DOCSIS terminology, basic features, and functions. This course is primarily based on the DOCSIS RFI specification, DOCSIS PHY specification, and DOCSIS MULPI specification. The course explores key DOCSIS management messages required to control the cable modem and manage the access link, both upstream and downstream. In addition, this course covers various Quality of Service (QoS) options for cable modem provisioning as well as the basics of load balancing and load balancing groups.

By attending DOCSIS Essentials workshop, delegates will learn to:

  • Identify the components of the DOCSIS network and the terms used to describe a DOCSIS network
  • Describe how the CMTS and the cable modem interact to range, provision, and register the cable modem –both single-channel and multi-channel modems, (i.e., channel bonding modems)
  • Explain what impairments might interfere with the registration process or normal operation (after CM registration, for example) and mitigation strategies to compensate for those impairments

  • A basic understanding of CATV systems, RF plant fundamentals, and data networking is recommended.

The DOCSIS Essentials class is ideal for:

  • Anyone wishing to learn about DOCSIS. It would be particularly useful to CMTS technical support staff and other headend personnel.

COURSE AGENDA

1

DOCSIS Overview

  • Evolution of the cable network
  • Cable Television Laboratories
  • DOCSIS major components
  • DOCSIS interfaces
  • DOCSIS operations
  • DOCSIS protocol stack
  • DOCSIS headers
  • History of DOCSIS 1.0, 1.1, 2.0, 3.0
2

PHY Layer—Downstream Channel

  • Downstream spectrum
  • Modulation in the downstream
  • Transmission Convergence Sublayer
  • MPEG format
  • Physical Media Dependent Sublayer
  • DS interleaver
  • DS signal processing: Symbol mapping, pulse shaping, I and Q modulation
3

Upstream Channel

  • Upstream spectrum range (D1.x, D2.0, D3.0, D3.1)
  • Signal processing: FEC, interleaver, scrambler, preamble, symbol mapper, equalizer, pulse-shaping, modulation (QPSK, 8-, 16-, 32-, 64-, and 128-QAM)
  • Access technologies:
  • TDMA: burst, mini-slot, timeslot
  • S-CDMA: Signal spreading, framer, S-CDMA compared to TDMA, SAC mode, MSC
  • Modulation profiles and burst parameters
4

RF Impairments

  • Typical upstream signal impairments: AWGN, roll-off, tilt, CPD, impulse noise, ingress noise, micro-reflections, non-linear distortion
  • Signal power levels at CM, CMTS, optical transmitter, and fiber node
  • Noise/distortion measurements: SNR, CNR, MER, CTO, CTB, return loss
  • Mitigating signal impairments (coding, frequency agility, QAM selection)
5

MAC Layer—MAC Domain Fiber Node and Service Group

  • Logical fiber node and DS and US channels
  • How fiber node, service group, and MAC domain interact
  • MAC domain DS service group
  • MAC domain US service group
  • MAC domain CM service group
6

DOCSIS MAC Management Messages

  • Synchronization (SYNC) and the time stamp: why modems need have the same clock
  • MAC Domain Descriptor Message (MDD), the MAC domain DS service group, and ambiguity resolution
  • Initial ranging (RNG, INIT-RNG, B-INT-RNG)
  • On-going ranging (RNG-REQ/RSP)
  • Bandwidth allocation (MAP, IUCs, D3.0 vs. legacy)
  • Contention resolution (Request, Data Grant)
  • Priority requests mechanism
  • Logical channels (four channel types) and what really is a logical channel
  • Modulation profiles and burst parameters (UCD): What are they and why use them?
7

Cable Modem Registration

  • Cable modem registration (REG)
  • Cable modem status (ranging, DHCP, ToD, offline, etc.)
  • TOD, DHCP, TFTP servers, and modem registration
8

Downstream Channel Bonding

  • Primary and secondary DS channels
  • Transmit channel set
  • Extended DOCSIS header, sequence number, and DSID
  • Downstream channel bonding groups
  • Downstream partial service
9

Upstream Channel Bonding

  • Receive channel sets
  • Multiple-Transmit Channel Mode
  • Continuous concatenation and fragmentation
  • Segments and SID clusters
  • Upstream channel bonding groups
  • Upstream partial service
10

Load Balancing

  • General load balancing groups
  • Restricted load balancing groups
  • Load balancing policies and rules
  • Commands for moving modems
  • Initialization techniques
11

Service Flows, Cable Modem Configuration, and Quality of Service

  • Data forwarding (cable modem as bridge and IP host)
  • Service flows and upstream scheduler types: BE, UGS, UGS-AD, RTP, NRTP
  • Quality of Service, including max and min rate, max concatenated burst, and peak rate
  • Classifiers and how classifiers work
  • TLVs
  • CM and CMTS MIC and shared secret
  • Downloading CM software

Encarta Labs Advantage

  • One Stop Corporate Training Solution Providers for over 6,000 various courses on a variety of subjects
  • All courses are delivered by Industry Veterans
  • Get jumpstarted from newbie to production ready in a matter of few days
  • Trained more than 50,000 Corporate executives across the Globe
  • All our trainings are conducted in workshop mode with more focus on hands-on sessions

View our other course offerings by visiting https://www.encartalabs.com/course-catalogue-all.php

Contact us for delivering this course as a public/open-house workshop/online training for a group of 10+ candidates.

Top
Notice
X