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Framework for GMPLS and PCE Control of G.709 Optical Transport Networks

Framework for GMPLS and PCE Control of G.709 Optical Transport Networks. CCAMP WG, IETF 77th, Anaheim, California , USA draft-zhang-ccamp-gmpls-g709-framework-02.txt Fatai Zhang (zhangfatai@huawei.com) Dan Li (danli@huawei.com) Han Li (lihan@chinamobile.com)

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Framework for GMPLS and PCE Control of G.709 Optical Transport Networks

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  1. Framework for GMPLS and PCE Control of G.709 Optical Transport Networks CCAMP WG, IETF 77th, Anaheim, California, USA draft-zhang-ccamp-gmpls-g709-framework-02.txt Fatai Zhang (zhangfatai@huawei.com) Dan Li (danli@huawei.com) Han Li (lihan@chinamobile.com) Sergio Belotti (sergio.belotti@alcatel-lucent.it )

  2. Changes from 00 • We welcome a new co-author (sergio.belotti@alcatel-lucent.it) and new contributors (Malcolm Betts, Pietro Grandi, Eve Varma); Thanks to Maarten Vissers. • Reconstructed Section 3, which is about OTN overview from the perspective of control plane. • Generalized two kinds of network topology from the perspective of control plane. • Removed non-normative stuff, e.g., ODU3ex. • Removed description of LO ODU terminology and two typical ODU connection examples to Appendix A. Note that we had version 01, but it is not presented.

  3. Reconstruction on Section 3 • Client Signal Mapping • ODU types and parameters • Multiplexing ODUj onto Links (i.e., TS allocation) • Link parameters • TPN (Tributary Port Number) Assignment

  4. Conn Management of the ODU(1) • ODU layer: Link #5 Link #4 ODXC Node E Link #2 Link #3 Link #1 ODXC ODXC ODXC ODXC Node B Node A Node C Node D • Work only with the ODU layer • In this layer there are links with a variety of TSes available, and nodes that are ODXCs (e.g., the ODU links (e.g., link#1-link#5) are presented between adjacent OTN nodes) • Lo ODU connections can be setup based on the network topology (e.g., Path computation will select a path that has the required number of TS available and offers the lowest cost. Signaling is then invoked to set up the path by carrying conn the information)

  5. Conn Management of the ODU(2) • ODU layer with OCh switching capability: Link #5 Link #4 ODXC Node E Node f Node g Node h ODXC ODXC ODXC ODXC Link #1 Link #2 Link #3 Node B Node A Node C Node D • OTN nodes interconnect with wavelength switched node (e.g., ROADM,OXC) that are capable of OCh switching • It is MLN (i.e, ODU layer and OCh layer) • HO-ODU/OCh connection will appear at ODU level as a Forwarding Adjacency which will be used to create the ODU connection

  6. Next Steps • Adopt it as a WG document • Continue discussion with ITU-T • Comments are always appreciated

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