1. Page - 1 76 th IETF – Hiroshima, Japan, November 2009 Framework for GMPLS and PCE Control of Wavelength Switched Optical Networks (WSON) Greg Bernsteingregb@grotto-networking.com Grotto Networkinggregb@grotto-networking.com Young Leeylee@huawei.comylee@huawei.com Huawei Wataru Imajukuimajuku.wataru@lab.ntt.co.jpimajuku.wataru@lab.ntt.co.jp NTT draft-ietf-ccamp-rwa-wson-framework-04.txt

2. Page - 2 76 th IETF – Hiroshima, Japan, November 2009 Authors/Contributors Snigdho Bardalai (Fujitsu) Greg Bernstein (Grotto Networking) Diego Caviglia (Ericsson) Wataru Imajuku (NTT) Daniel King (Old Dog Consulting) Young Lee (Huawei) Dan Li (Huawei) Itaru Nishioka (NEC Corp.) Lyndon Ong (Ciena) Pierre Peloso (Alcatel-Lucent) Jonathan Sadler (Tellabs) Dirk Schroetter (Cisco)

3. Page - 3 76 th IETF – Hiroshima, Japan, November 2009 WSON RWA Framework Scope Control plane models for key wavelength switched optical network subsystems and processes. The subsystems include: –wavelength division multiplexed links, tunable laser transmitters, –reconfigurable optical add/drop multiplexers (ROADM) and wavelength converters. The RWA process is reviewed and the information requirements are presented, along with alternative implementation architectures. Limitations: focuses on topological elements and path selection constraints that are common across different WSON environments and does not address optical impairments, nor does it address potential incompatibilities between some types of optical signals and some types of network elements and links

4. Page - 4 76 th IETF – Hiroshima, Japan, November 2009 Relation to Signal Compatibility Work For the purposes of this document we assume that all signals used in a WSON are compatible with all network elements and links within the WSON. This can arise in practice for a number of reasons including: a)only one class of signal is used throughout the network b)only "relatively" transparent network elements are utilized in the WSON. c)different signal types are restricted to specific subnetworks and conversion takes place at all subnetwork boundaries (optical islands)

5. Page - 5 76 th IETF – Hiroshima, Japan, November 2009 Updates From 02 –Edited abstract and intro to differentiate between this document and impairment and compatibility drafts. –Removed discussion of fiber impairments –Removed most discussion of optical signal types and compatibility including regenerators. –Editorial enhancements and corrections From 03 –Added 4-degree bidirectional ROADM example to section 3.3.1 per WG mailing list request.

6. Page - 6 76 th IETF – Hiroshima, Japan, November 2009 Next Steps Last Call