WSON Signal Characteristics and Network Element Compatibility Constraints for GMPLS

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WSON Signal Characteristics and Network Element
Compatibility Constraints for GMPLS
draft-bernstein-ccamp-wson-compatibility-01.txt
Greg Bernstein gregb_at_grotto-networking.com Grott
o Networking Young Lee ylee_at_huawei.com Huawei
Ben Mack-Crane tmackcrane_at_huawei.com Huawei
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Scope and Purpose

• Characterize optical signals and their attributes
• Extend the GMPLS/PCE control plane to a
  combination of transparent optical and hybrid
  electro optical systems where not all network
  elements are compatible with all optical signals
  or their attributes.
• Provision important optional processing functions
  at nodes, such as regeneration, as part of
  optical path establishment

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Revised Document Outline

• Optical Signals in WSONs
• Electro-Optical Systems
• Regenerators, OEO switches, and wavelength
  converters
• Further Characterizing WSON NEs
• Input and Output signal constraints Processing
  Capabilities
• Networking Scenarios the Control Plane
• Fixed and shared regenerators reconfigurable
  regenerators relation to translucent networks

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Optical Signal Parameters/Attributes

• Modulation format and parameters This can change
  along a path.
• FEC use and type This can change along a path
• Center frequency (wavelength). Can change along a
  path.
• Bit rate. Does not change along a path
• Client signal type (G-PID) Does not change along
  a path.

Can change along a path
Already in GMPLS
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Characterizing network elements

• Input Constraints
• Acceptable modulation formats
• Client Signal (GPID) restrictions
• Bit rate restrictions
• FEC coding restrictions
• Configurability none, self-configuring, required

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Characterizing network elements (cont.)

• Output Constraints
• Output modulation is the same as input modulation
  (default)
• A limited set of output modulations is available
  (more that one requires configuration)
• Output FEC is the same as input FEC (default)
• A limited set of output modulations is available
  (more that one requires configuration)

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Characterizing network elements (cont.)

• Processing Capabilities
• Regeneration (fixed, selective, etc)
• Fault and Performance Monitoring (FFS)
• Wavelength Conversion (already in RWA-WSON
  framework)
• Switching (already in GMPLS)

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Networking Scenarios GMPLS Implications

• Fixed regeneration capability
• Regenerator points are fixed and have not
  configurable options
• Routing would carry compatibility information for
  use in path computation.
• Shared regeneration pools
• Some nodes can selectively provide regeneration
  to a signal.
• Routing would carry compatibility and processing
  capability information
• Signal would include information to indicate
  which nodes along a path provide regeneration

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Networking Scenarios GMPLS Implications (cont.)

• Configurable regenerators
• Regenerator points have configurable input or
  output options
• Routing would carry compatibility/capability
  information for use in path computation.
• Signaling would include signal attributes for use
  in configuring regenerators.
• Translucent Networking Scenarios (subset of
  previous cases)
• Transparent Islands
• Limited number of opaque (OEO) nodes
• Limited number of nodes with shared regenerator
  pools

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Next Steps

• Adopt as a CCAMP WG document ?