Advances in Optical Technology

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Advances in Optical Technology FI

• 2007.5.30
• ???

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OCS, DOCS, OPS, OBS

• OCS (Optical Circuit Switching)
• Limited circuit
• Low efficiency (due to fixed bandwidth)
• Unfashionable
• DCS (Dynamic Circuit Switching)
• Well-suited to optics
• Circuit switches are simple
• Higher capacity per unit volume/watt
• Lower cost per Gb/s
• OBS (Optical Burst Switching)
• Assemble the packets (have same destination)
• make bursts at the edge
• Switched through transparently without any
  conversion
• No need for Optical buffer.
• OPS (Optical Packet Switching)
• Using Packet ( Header (for routing) Data )
• Need buffers, Long Switching time, difficulty of
  bit-level processing

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Comparison
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DOCS Network Example
DOCS Node
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OFS-MIT, Chan(scheduled flow-based transport
architecture)

• Physical and logical architecture
• Transport mechanisms flow switching
• Routing separate IP and optical control planes
• Very fast dynamics lt 100mS
• Scalable
• Low cost

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References

• Clark2005 David D. Clark, What is
  "Architecture"?, Background Paper for FIND
  Informational Meeting AGENDA presentation,
  November 2005
• Bannister2000 Joe Bannister and et al., Optical
  Networks Will Future Networks Be Structured
  Differently Than Today's Networks?, NSF Workshop
  on The Future Revolution in Optical
  Communications and Networking, December 2000
• 2007 Blumenthal-Optical Techniques For
  Circuits And Packet-Based Networking
• Broadnets 2006 Nick McKeown-Dynamic Optical
  Circuit Switched (DOCS) Networks for Future Large
  Scale Dynamic Networking Environments
• The Stanford Clean Slate Program Nick McKeown
• ECOC 2005 Nick McKeown-Introducing optical
  switching into the network