NEW ADVANCES IN TELECOMMUNICATIONS Lancaster University : 11 March 2002

1
NEW ADVANCES IN TELECOMMUNICATIONSLancaster
University 11 March 2002

• Dai Davies General Manager
• dai.davies_at_dante.org.uk
• www.dante.net

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Telecommunications - The Building Blocks

• Access
• Transmission
• Switching
• Management

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DANTE

• Builds and Manages the Pan-European Research
  Internet
• Organises Development of New Services
• Interested in Advancement of Technology

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Development of Prices for International
Bandwidth (Logarithmic Scale)
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Pan European Network History
GEANT 2001-
TEN-155 1998-2001
TEN-34 1997-1998
EUROPANET 2 1996-1997
EUROPANET 1993-1996
IXI 1990-1993
2000
4000
6000
8000
10000
12000
Trunk Network Capacity (KBps)
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Pan European Network History - Logarithmic Scale
GEANT 2001-
TEN-155 1998-2001
TEN-34 1997-1998
EUROPANET 2 -
1996-1997
EUROPANET
1993-1996
IXI 1990-1993
1
10
100
1,000
10,000
100,000
1,000,000
10,000,000
KBps
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GEANT Backbone Topology March 2002
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Access

• xDSL
• Cable Modem
• G-Ethernet
• Dark Fibre
• 3G Mobile

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Transmission Building Blocks
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Transmission Building Blocks

• Development
• 2003 40 GBps
• 2005 80 GBps
• Denser DWDM

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DWDM Implementation and Switching

• Analogue Technology
• power budgets
• attenuation
• chromatic dispersion
• Mechanical (physical) Switching
• Crude Management

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Switching

• Architecture - Software vs Hardware
• Wire Speed Performance
• Back to Crossbar

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Data Switching Building Blocks
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Switching Building Blocks Performance
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Management

• Less rather than More
• Quality of Service
• Network Intelligence
• A Forgotten World

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Network Management

• Per Flow vs Per Packet
• Network Statistics
• Network Configuration
• Optical Switching

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Telecommunications Successes

• Switched Voice
• TELEX
• FACSIMILE - Group 3
• Mobile - including GSM
• World Wide Web

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Telecommunications Lemons

• Teletex
• I.S.D.N.
• Videotext
• Low Flying Satellites

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The New Challenges

• Network Management
• New Services
• New Applications