1. Page - 1 71 th IETF – Philadelphia, March 2008 Signaling Extensions for Wavelength Switched Optical Networks Greg Bernsteingregb@grotto-networking.com Grotto Networkinggregb@grotto-networking.com Young Leeylee@huawei.comylee@huawei.com Huawei draft-bernstein-ccamp-wson-signaling-01.txt

2. Page - 2 71 th IETF – Philadelphia, March 2008 Signaling Extensions for WSON Provides extensions to Generalized Multi-Protocol Label Switching (GMPLS) signaling for control of wavelength switched optical networks (WSON). These extensions build on previous work for the control of G.709 based networks. Key extension areas: –Traffic parameters for optical signals –Fix bi-directional wavelength assignment issue Minor extension areas: –Wavelength Sets (useful optimization) –Distributed Wavelength Assignment control

3. Page - 3 71 th IETF – Philadelphia, March 2008 Relation to other Drafts Based on Routing with Distributed WA via Signaling (RWA computational architectures defined in WSON Framework) Xu - Extensions to GMPLS RSVP-TE for Bidirectional Lightpath with the Same Wavelength –Addresses bi-directional distributed wavelength assignment, proposes solution. We included this solution in our draft.

4. Page - 4 71 th IETF – Philadelphia, March 2008 Optical Signal Parameters Ideal Spectral Characteristics –Modulation Type General type such as NRZ, RZ, etc… Any modulation specific parameters such as duty cycle for RZ, etc… –Better for characterizing narrow line width stable sources –Bandwidth Mask More of an analog characterization Spectral width/stability –Characteristic of the source laser (to be added in next revision) –Or combined with bandwidth mask. Action –Review current ITU-T recommendations and supplements and take to SG15 question 6 if not adequately defined.

5. Page - 5 71 th IETF – Philadelphia, March 2008 PCE Architectures for RWA PCE NE D NE G NE F NE E NE H NE C NE B NE A (1,3,4,6) (1,3,6,7) (1,3,4,5,7) (1,3,5) (2,4,5,7) (3, 4, 7) (1, 3, 7) (4, 6, 7) 5 (1,3,4,6,7) 15 10 PCE communications NE #1 acting as a PCC Available wavelengths (channels) on link Link weights (used in some calculations) Example Network

6. Page - 6 71 th IETF – Philadelphia, March 2008 Routing with Distributed WA PCE R NE D NE G NE F NE E NE H NE C NE B NE A (1,3,4,6) (1,3,6,7) (1,3,4,5,7) (1,3,5) (2,4,5,7) (3, 4, 7) (1, 3, 7) (4, 6, 7) 5 (1,3,4,6,7) 15 10 RSVP-T Label set (1, 3, 4, 6, 7) RSVP-T Label set (1, 3) RSVP-T Label set () SETUP FAIL RSVP-T Path Err RSVP-T Label set (1, 3, 4, 6, 7) RSVP-T Label set (4, 6, 7) RSVP-T Label set (7) SUCCESS! (2)NE A attempts to establish lightpath on {A, D, E, F} with distributed WA (1)NE A requests a path to NE F, but no WA, PCE R returns {A, D, E, F} (4)NE A establishes lightpath on {A, D, G, H, F} via signaling and distributed WA. (3)NE A requests a different path to NE F, but no WA, PCE R returns {A, D, G, H, F}

7. Page - 7 71 th IETF – Philadelphia, March 2008 Problem with bi-directional wavelength assignment and RSVP-TE PCE R NE D NE G NE F NE E NE H NE C NE B NE A (1,3,4,6) (1,3,6,7) (1,3,4,5,7) (1,3,5) (2,4,5,7) (3, 4, 7) (1, 3, 7) (4, 6, 7) 5 (1,3,4,6,7) 15 10 RSVP-T Label set (1, 3, 4, 6, 7) RSVP-T Label set (4, 6, 7) RSVP-T Label set (7) SUCCESS! Need to specify upstream label here. Don’t know what upstream label we should have specified until here!

8. Page - 8 71 th IETF – Philadelphia, March 2008 Next Steps Determine how to move forward with various signaling drafts –Authors conference call in April. On how to combine. –Current draft authors: Sugang Xu, Hiroaki Harai, Daniel King, Greg Bernstein, Young Lee.