Comcast Proprietary and Confidential Next Gen Access Architecture July, 2011 CCAP (CMAP) Program at...

Comcast Proprietary and Confidential

Next Gen Access Architecture

July, 2011

CCAP (CMAP) Program at Comcast

SCTE 2011


Why would MSOs need CCAP?• Engineering: Capacity and efficiency, frees significant HE capacity

50% space savings with 4x capacity 60% power savings plus less cooling Improve existing UPS and battery backup performance

• Architecture: Simplicity and flexibility is already a key driver Minimum, simplified combining wiring Full-spectrum, MPEG/DOCSIS QAMs, easier migration to ADS Future proof, single access platform

• Purchasing: Cost will quickly become a big driver CMTS 4-6 DOCSIS channel cost equals CCAP 16 DOCSIS + 16 MPEG Channels !!

• Operations: Reliability and manageability will also drive adoption Fully redundant (N+1 LC & 1+1 Commons) Configuration change between QAM types vs. equipment swap-out Much shorter maintenance window (ISSU) Far less equipment to manage and maintain

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Top view of headend rack line-up

Each box represents a rack

Example for illustrative purposes

Top view of headend rack line-up

Each box represents a rack

Example for illustrative purposes

CCAP space efficiency exampleToday’s HE: 16 NC QAMs per SG

Digital Broadcast

VOD

CMTS

Combiner & Amps

Lasers & Receivers

SDV

After CCAP: 64 NC QAMs per SG

NOTES:• Deployment example assuming 40K homes passed, 200 nodes, 140 D3 HSD service groups at 16 SG/chassis,

120 VOD SGs @ 6QAMs/SG and 4 QAMs/RF Port, and same SDV service groups.• Larger or smaller headends would scale accordingly, but savings will be proportional.

1/21/2Space

Space

4x 4x

Capacity

Capacity

3

CCAP eliminates the need for headend expansions


CCAP yearly power savings in a typical headend

4

CCAP saves 60% of power, not including cooling energy savings!CCAP saves 60% of power, not including cooling energy savings!

UPS and battery requirements are also reduced – existing capacity UPS and battery requirements are also reduced – existing capacity will last considerably longer when power is interrupted. will last considerably longer when power is interrupted.


Integrated Integrated CCAPCCAP

CCAP in a nutshellCCAP DS Port AssignmentsCCAP DS Port Assignments

DS RF Port

32/48/64 NC QAMs +

96 BC QAMs

HSD CDV

VODnDVR

SDV

DO

CS

ISM

PE

G T

S

Simplify, and eventually

eliminate RF Combining

AVS

Bro

ad

ca

st

US

DS

Legacy OOB

Narrowcast & Broadcast Digital Services

CCAPAnalog

SplitLegacy OOB

Modular Modular CCAPCCAP

USUS R

edun

danc

yUS US US USDSDS

Red

unda

ncy

DS DS DS DSXR1

XR2

Power Supply

Modules

Primary Switch/Route Engine

12 Ports/DS Card32/48/64 Narrowcast QAMs/Port

96 Broadcast QAMs/Port

Fan Modules

Intake Air

Primary 100-Gig-E Ports

Secondary 100-Gig-E Ports

Exhaust Air

Secondary Switch/Route Engine

24 Ports/US Card(Implemented using

high density UCH w/

MCX-75 connectors)

Front View16U Chassis

Rear View16U Chassis

• Converged Cable Access Platform• Combines the functions of the CMTS and Edge QAM• Implements all narrowcast and broadcast QAMs


Operational features of CCAP

6

Open decryption/encryption interfaces


Integrated vs. Modular CCAP components

7

Each approach has pros and cons

HE Router ICCAPI-CCAPSingle CCAP

Vendor

IP

Routing

HE Router / M-CCAP PS ICCAPM-CCAP

ASBest-in-Class

Expertise

PASI

Sub & Flow Management


CCAP use cases examples (two of several)

8

Where I-CMTS exists

US

DS

To

day

To

day

Fu

ture

Fu

ture

HE Router

Bc

as

t

VO

D

SD

V

URURI-CMTS

US

HE Router

URI-CCAP

US

DS

HE Router

BC

as

t

VO

D

SD

V

M-CMTS Core

URUEQAM

US DS

HE Router

M-CMTS Core

URM-CCAP ASin DS mode

DS

HE Router / M-CCAP PS

URM-CCAPAS

US

DS

US

HE Router

URURI-CCAP

DS

Add density with CCAP Access Shelf

in DS-only mode

Add density with CCAP Access Shelf

in DS-only mode

Shorter TermShorter Term

Lo

ng

er T

erm

O

pti

on

sL

on

ger

Ter

m

Op

tio

ns • Migrate to

I-CCAP & relocate CCAP-AS

• Or, add CCAP PS

• Existing Router w/PS SW

• Add US LCs

…M-CCAP

For M-CMTS marketsFor M-CMTS markets

Eventually I-CCAP or…


CCAP migration options

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Capacity Augment

New ServiceDeployment

InfrastructureUpgrade

• Drop in CCAP as SGs are split or EQAMs/CMTSs are added

• Keep current equipment and eventually move to other locations

• Add CCAP for new service• Maintain existing equipment

for existing services• Eventually integrate other

services into CCAP

• Add CCAPs for all SGs in key HEs

• Independent of services• Existing equipment relocated

Broadcast and OOB

SDV/VOD EQAMs

CMTSs

Combiner

Lasers and Receivers

Existing SGs New SGs

CCAP

Existing SGs

CCAP for New Service

Broadcast and OOB

SDV/VOD EQAMs

CMTSs

Combiner

Lasers and ReceiversExisting SGs

CCAP

Broadcast and OOB

Combiner

Lasers and Receivers


Preparing for CCAP

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• Work underway in the many areas at Comcast: Systems: configuration, monitoring, logging, fault detection, trouble

management, inventory, databases, etc. Operations: changes to deploy and manage single device Testing: process (who/how/when and what order), and edge QAM, DRFI

performance, new features, and new services (RS-DVR, AVS)

• Deployment planning: Network models for system types: very large to very small HEs Trials starting in 2011: operational readiness focus, not equipment

• New combiner equipment: optimized for CCAP and remaining inputs

• Working with Motorola and Cisco on encryption licensing model and ECMG implementation plan


• CCAP-like network to understand technical/ops issues and prepare Operational processes, tools, network engineering, etc.

• The trial is about MSO operations, NOT to test equipment

• The scope will be minimal but meaningful (few service groups)

CCAP operational readiness trial – concept diagram

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DS

US

VOD

SDV

BCAST

OTHER QAMs

6

4

4

4

20-24

DTA2-4

ANALOGTEST

~120

All servicesM-CMTS

Core

M-CCAP ASin DS-only mode

Co

mb

ine

r

Collaborative effort with Cox and Rogers


Completing CCAP specifications• Large team of industry experts developing CCAP specs

Key engineers and architects from all EQAM and CMTS vendors Agreements with Cablevision, Charter, Cox, LGI/UPC, NCTC, Rogers, and

others, plus working with TWC on common requirements Direct support from CableLabs; now working on CL CCAP Specs Cable Europe Labs representing the 15 largest MSOs in Europe

• MSO specification documents:

Phase 1 completed in March 2010 (focus on HW & Functions)

Phase 2 completed in July 2010 (added Config & Mgmt and PASI)

Phase 3 completed in Nov. 2010 (expanded all specs; wrote CL TR) Phase 4 in progress, adding adv. Functions, ATP and updated CL TR (target

Sept. ’11)

– CableLabs working on CCAP OSSI and PASI specs

– Changed name to converge TWC and Comcast efforts12


Summary and conclusions• CCAP Platform is the Next Gen CMTS and Edge QAM

Natural technology evolution; cost effective, simple and redundant Supports all digital services (VOD, SDV, Broadcast, HSD/voice) Easy migration from MPEG-TS to DOCSIS

• Many MSOs need the CCAP ASAP Operational simplicity and benefits are staggering CCAP QAMs are much more cost effective

• Expect initial trials in 2011 and initial deployments in 2012

• Please let us know of any interest in participating, or of questions, comments and especially suggestions

[email protected]

[email protected]

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Thank You!!

Comcast Proprietary and Confidential Next Gen Access Architecture July, 2011 CCAP (CMAP) Program at...

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