1. Page - 1 76 th IETF – Hiroshima, Japan, November 2009 WSON Signal Characteristics and Network Element Compatibility Constraints for GMPLS Greg Bernsteingregb@grotto-networking.com Grotto Networkinggregb@grotto-networking.com Young Leeylee@huawei.comylee@huawei.com Huawei Ben Mack-Cranetmackcrane@huawei.com Huawei draft-bernstein-ccamp-wson-compatibility-01.txt

2. Page - 2 76 th IETF – Hiroshima, Japan, November 2009 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

3. Page - 3 76 th IETF – Hiroshima, Japan, November 2009 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

4. Page - 4 76 th IETF – Hiroshima, Japan, November 2009 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

5. Page - 5 76 th IETF – Hiroshima, Japan, November 2009 Characterizing network elements Input Constraints –Acceptable modulation formats –Client Signal (GPID) restrictions –Bit rate restrictions –FEC coding restrictions –Configurability: none, self-configuring, required

6. Page - 6 76 th IETF – Hiroshima, Japan, November 2009 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)

7. Page - 7 76 th IETF – Hiroshima, Japan, November 2009 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)

8. Page - 8 76 th IETF – Hiroshima, Japan, November 2009 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

9. Page - 9 76 th IETF – Hiroshima, Japan, November 2009 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

10. Page - 10 76 th IETF – Hiroshima, Japan, November 2009 Next Steps Adopt as a CCAMP WG document