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Routing and Wavelength Assignment Information Encoding for Wavelength Switched Optical Networks

Routing and Wavelength Assignment Information Encoding for Wavelength Switched Optical Networks. draft-bernstein-ccamp-wson-encode-01.txt. Greg Bernstein gregb@grotto-networking.com Grotto Networking. Authors/Contributors. Greg Bernstein (Grotto Networking) Diego Caviglia (Ericsson)

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Routing and Wavelength Assignment Information Encoding for Wavelength Switched Optical Networks

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  1. Routing and Wavelength Assignment Information Encoding for Wavelength Switched Optical Networks draft-bernstein-ccamp-wson-encode-01.txt Greg Bernstein gregb@grotto-networking.com Grotto Networking 73th IETF – Minneapolis, MN, November 2008

  2. Authors/Contributors • Greg Bernstein (Grotto Networking) • Diego Caviglia (Ericsson) • Ander Gavler (Acreo AB) • Young Lee (Huawei) • Dan Li (Huawei) • Wataru Imajuku (NTT) • Jonas Martensson (Acreo AB) • Itaru Nishioka (NEC Corp.) 73th IETF – Minneapolis, MN, November 2008

  3. Encoding RWA Info in WSON • Encoding of RWA information • Reduce info transmission burden • Reduce path computation burden • Changes from Encoding 00.txt • Used RBNF according to A. Farrel, "Reduced Backus-Naur Form (RBNF) A Syntax Used in Various Protocol Specifications", work in progress: draft-farrel-rtg-common-bnf-07.txt, October 2008. 73th IETF – Minneapolis, MN, November 2008

  4. Encoding Overview • Sub-TLVs • Link Sets • Connectivity Matrix (Bipartite Graph) • Wavelength Sets • Port Wavelength Restrictions • Composite TLVs • Node TLV, Dynamic Node TLV • Link TLV, Dynamic Link TLV 73th IETF – Minneapolis, MN, November 2008

  5. Connectivity Matrix Encoding & Representation • Criteria • Reduce amount of information to transmit (scaling of control plane) • Reduce number of (internal) nodes and links needed to represent an asymmetric WDM switch (scaling of path computation algorithms is usually in terms of # of nodes and # of links). • Techniques • Sparse matrix • Minimum cover of complete bipartite subgraphs 73th IETF – Minneapolis, MN, November 2008

  6. Next Steps • Adopt as Working Group Document  • Encode Wavelength Converter Pools • Interconnection structure, Converter properties, Converter ingress/egress constraints, Converter Status • Finalize switch encoding • Multiple fixed and switched blocks or at most one of each? 73th IETF – Minneapolis, MN, November 2008

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