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Residential Broadband Internet Access in the United States: the Changing User Experience Dr. William Lehr Executive Director MIT Internet & Telecoms Convergence Consortium wlehr@rpcp.mit.edu http://itel.mit.edu Presentation to Sprint Research Symposium Lawrence, Kansas March 8-9, 2000

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Residential broadband internet access in the united states the changing user experience l.jpg

Residential Broadband Internet Access in the United States: the Changing User Experience

Dr. William Lehr

Executive Director

MIT Internet & Telecoms Convergence Consortium

wlehr@rpcp.mit.edu

http://itel.mit.edu

Presentation to

Sprint Research Symposium

Lawrence, Kansas

March 8-9, 2000


Outline l.jpg
Outline

  • What is broadband?

  • Cable vs. xDSL

  • Cable availability

  • Issues and Questions

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


What is broadband l.jpg
What is broadband?

  • “High speed”

    • greater than 200 Kbps (not 56K/ISDN)

    • both directions? (not DirectPC)

    • how measured? (CIR vs. burst)

  • “Always on”

  • Internet access

    • Access to standard Internet services: email, web browsing, telnet, and FTP

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


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What technologies?

  • Cable modems (since 1996)

    • pre- and DOCSIS modems

  • xDSL (since 1999)

    • ADSL, SDSL, HDSL, G.Lite, etc.

  • LMDS & other wireless (2000?)

    • Sprint’s MMDS plans

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


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Cable vs. DSL

  • Similar?

    • “High speed”, Always on, Internet access

    • Shared Internet access

    • Basic infrastructure ubiquitously available

  • Different?

    • Cable more mature, more standardized

    • Cable Operators vs. Local Telephone companies?

    • Bandwidth limitations? Sharing? Location?

    • Residential vs. Business (initially)

  • Cable early leader, DSL follows...

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


Cable vs xdsl l.jpg

200 - 2000

homes passed

per node

Coaxial Copper

Server,

Accounting,

Cache, etc.

Neighborhood

Optical Fiber

Node

...

Internet

Cloud

...

Optical Fiber

Coaxial Copper

Router

Neighborhood

Node

Twisted-pair Copper

Server,

Accounting,

Cache, etc.

Optical Fiber

DSLAM

Digital Loop Carrier

...

(DLC)

Internet

Cloud

...

Twisted-pair Copper

Optical Fiber

Router

DSLAM

Digital Loop Carrier

(DLC)

Cable vs. xDSL

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


Architecturally similar but with different uncertainties l.jpg

Shared LAN: bandwidth and security issues

Headend

Server,

Accounting,

Cache, etc.

Cable

Internet

Cloud

Router

Central Office

Connections to Internet backbone and other ISPs

Server,

Accounting,

Cache, etc.

DSL

Internet

Cloud

DSLAM

Router

Varying distances from CO, wire groupings etc.

Shared (muxed) bandwidth

Architecturally similar, but withdifferent uncertainties


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Pricing

  • $40-$60/month for residential service

    • Compare vs. 2nd POTS line + dialup ISP account

    • Higher installation charges typical

    • Prices much higher for DSL commercial services

  • Expect prices to fall….$40 or lower (?)

  • Competition

    • Free ISPs

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


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Availability

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


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Cable Deployment - 1998

1996

1997

1998

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


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Cable Modem Deployments

  • Broadband far from universal

    • 781 communities in US in 232 (3,133) counties through mid-1999

      • 10% of counties, 43%* of population

    • Deployments progressing rapidly (65% cable systems 2-way)

    • Still early phase

  • Deployment first to largest, affluent communities

    • Of largest 100 counties, 69 have modems

    • Where you would expect

  • Strong MSO effect

    • MediaOne clear leader

    • Different strategies, different infrastructure

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


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Demographics of cable modem deploymentsthrough June 1999

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


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Broadband impacts

  • Future of Internet is broadband access…

  • Broadband users...

    • More experienced Internet users

    • Richer, better educated, etc.

    • Like early adopters of Internet

  • More time on line…

    • Combine with telephone and other usage

    • Move PC to living space (??)

    • Wireless in-home networks (mobility, convenience)

  • “Always on” critical

    • Save connection time

    • Enable push and other capabilities

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


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Cable modem penetration: Prognosis

  • Much higher than we have seen…

    • Mergers (AT&T/TCI/MediaOne, Time-Warner/AOL)

    • Little real marketing yet: supplier push weak

      • Doubts about market acceptance

      • Fears re customer service costs

      • Little (if any) competitive pressure

  • “Broadband content” in its infancy

  • Internet not yet fully mainstream

  • Standards, regulation

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


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Issues and Challenges

  • Traffic management

    • More bursty (self-similarity problem)

  • Regulatory policy

    • Line sharing for DSL

    • Cable unbundling ???

  • New applications

    • Telephony over cable, over DSL

    • Streaming media

    • Napster, etc.

© Gillett & Lehr, Residential Broadband Internet Access in U.S.


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Issues and Challenges

  • New networks: content delivery networks

    • Push and pull…

  • Congestion

    • Managing consumer bandwidth expectations

    • Cable: upstream, DSL: cross-talk

    • Collocation space scarcity

  • Always on, Security (Privacy)

© Gillett & Lehr, Residential Broadband Internet Access in U.S.