Network Architectures: What’s On the Drawing Board?

Network Architectures: What’s On the Drawing Board?

Broadband Venture SeminarBroadband Venture Seminar

Doug JonesChief Architect

YAS Broadband Ventures, LLCSeptember 7, 2001







Rouzbeh YassiniFounder & CEO


Presented for

Broadband Ahead

Broadband Venture Seminar

Sep 7, 2001

Telecommunication Market Year PlatformNetwork Model60 Main frame

100:1 Batch-driven, Processing (high-latency, high cost)

70 Minicomputer 10:180 PC era 1:190 Enterprise 1:1000 Broadband

1:100 Real-time, Adoptive, Interactive (no latency, low cost)

• 100 MbPS / 1 GbPS switch architecture to each home


Sep 7, 2001


Broadband World

Home User E-Mail, Chat Web Surfing Music Delivery Game Playing Telephony

Educational Support

Learn @ Home School

Administration Distance Learning

Medical Patient Monitoring Medical Images Remote Diagnostics Telemedicine

Work @ Home Video Conferencing Intranet Access Network Management Shared Whiteboarding Research

Global Commerce Home-Based Shopping Real Estate, Insurance DMV, Local Town B2B, B2C

Publishing Business Book On-Demand Printing Shop Media Center

Sep 7, 2001

Classifying Next-Gen Network Developments

Local AccessCore Network


Sep 7, 2001

Drivers for Next Generation NetworksLocal Access Networks

• More Raw and Symmetric Bandwidth– Up to 10 times the interactive bandwidth per

user.

• Fiber-deeper architectures, reducing node size down to 50 homes or less– Improved Network Availability- (smaller failure

groups)

• Fewer active elements in the field– Improved quality and lower maintenance costs


Sep 7, 2001

Drivers for Next Generation NetworksLocal Access Networks

• Network cost savings– Combining equipment in headend and in

the home to deliver multiple services• Continued decline in costs of deep fiber

solutions– A recent study (Finisar) showed the cost of

optical transmitters dropped 80% in the 5 years


Sep 7, 2001

• Powerful multimedia networks that are capable of handling high-volume interactive services

• Alleviate potential network bottlenecks and improve network performance while delivering new advanced services

• Unconstrained managed bandwidth everywhere will accelerate the creation and integration of next-generation IP services

The End Result


Sep 7, 2001

Next Generation Local Access Networks

•Traditional Cable “tree and branch” network•Hybrid Fiber/Coax Cable network •Switched GigE over Cable •Fiber - to - the – Curb - (FTTC)•Passive Optical Network


Sep 7, 2001

Source: CIBC World Markets Corp. Estimates

1998 1999 2000 2001 2002 2003 2004

Year

0

20

40

60

80

HH

s (

mill

ion

s)

0

10

20

30

40

50

% p

enetratio

n

Total HHs

% of Internet HHs % of all HHs

Households with High Speed Internet Access


Sep 7, 2001

Traditional Cable ArchitectureTree and Branch

Headend

Trunks

Distribution

Tap

LEs


Sep 7, 2001

Fiber node area

Fiber optic cable

Coax

HFC Architecture


Sep 7, 2001

Corporate America used Broadband for factory automation (GM, Ford,etc)

U.S. government used Broadband for facility-wide network (Rock Island Arsenal in IL)

Universities used Broadband for campus-wide networks (Emory University, University of Michigan)

Cable operators empowered the consumers (all over the U.S., 400 sites were tried)

Millions are using Broadband technology worldwide

Estimated 100 Million will use Broadband technology worldwide

1984 - 20101984

1988

1991

1995

2001

2010

Broadband Deployment


Sep 7, 2001

HFC and FTTB Coexist Today

Key Questions: Merge these two over Cable HFC networks

HE

NODE

NODE

OLT

HFC

GbE FTTx


Sep 7, 2001

Exciting New Methods for Data over Cable

• Use spectrum above 860 MHz for 100 Mbps / 1 Gbps

• Coexists with existing services below 860 MHz• Brings huge amount of bandwidth to bear for home

and business use• Switched Ethernet, ubiquitous and low cost


Sep 7, 2001

+

Coax and/orCat5 wiring to homes

Optical node

Headend

Fiber-to-the-Curb (FTTC)Dedicated capacity to the home of business


Sep 7, 2001 Page 17

HFCNODE

switch

FTTC PON

& HFC

FTTBPON

OLTswitch

Headend

NODE

Dedicated GbE wavelengths enable high-bandwidth FTTB


Sep 7, 2001 Page 18

Network Migration: HFC to FTTx

Optical Line Termination (OLT)

Optical NetworkTermination (ONT)

Optical splitter

Passive Optical Network(PON)


Sep 7, 2001 Page 20

Summary• The broadband access network must serve both

residential and business customers• HFC is becoming more flexible and reliable

– Scaleable bandwidth via DWDM – More passive via DWDM, GbE return and RF

innovations• FTTx / GbE will co-exist with HFC to serve higher

bandwidth needs– WDM technology provides scalability, reliability

and compatibility with HFC– Networks leveraging both switched and passive

deep fiber architectures


Sep 7, 2001 Page 21

Summary

Local AccessCore Network


Sep 7, 2001 Page 22

Network Architectures: What’s On the Drawing Board?

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