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Zero Touch Photonic Networks: Implementation of GMPLS for Hybrid Optical Networking Gert Grammel PLM Crossconnect Product Group Sept 15, 2009.

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Presentation on theme: "Zero Touch Photonic Networks: Implementation of GMPLS for Hybrid Optical Networking Gert Grammel PLM Crossconnect Product Group Sept 15, 2009."— Presentation transcript:

1 Zero Touch Photonic Networks: Implementation of GMPLS for Hybrid Optical Networking Gert Grammel PLM Crossconnect Product Group Sept 15, 2009

2 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 2 | GMPLS for Hybrid Optical Networking | May 2009 The challenge Zero Touch Photonics GMPLS CONTROL PLANE REAL TIME RESTORATION HIGH SURVIVABILITY 10/40/100 G LAMBDAS AUTOMATIC PROVISIONING OPTICAL PATH FEASIBILITY ABCD B C D A PLANNING&DESIGN

3 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 3 | GMPLS for Hybrid Optical Networking | May 2009 GMPLS Path computation Path feasibility When the OSNR and/or NLE thresholds are crossed, the physical path is considered unfeasible Transponder type (bit rate, modulation format, FEC type…): Transponder types have different OSNR, NLE and PMD penalties/tolerances Optical route impairment accumulation (wavelength independent): OSNR margin: remaining margin before reaching the OSNR Threshold NLE margin: remaining margin before reaching the Nonlinear Threshold PMD: accumulated PMD (also influencing the OSNR margin, by imposing a penalty) NLE 1 OSNR Link1 PMD Link1 Section/OMS 1 Node1Node2Node3Node4 Path NLE 2 OSNR Link2 PMD Link2 NLE 3 OSNR Link3 PMD Link3 Section/OMS 2 Section/OMS 3

4 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 4 | GMPLS for Hybrid Optical Networking | May 2009 Domain considerations 1

5 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 5 | GMPLS for Hybrid Optical Networking | May 2009 Control Plane Networking How to manage growth? GMPLS / WDM λ GMPLS control plane 3R ODU/OTH λ GMPLS control plane 3R ODU/OTH

6 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 6 | GMPLS for Hybrid Optical Networking | May 2009 Control Plane Networking using E-NNI? λ GMPLS control plane λ E-NNI 3R λ GMPLS control plane ODU E-NNI 3R λ GMPLS control plane

7 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 7 | GMPLS for Hybrid Optical Networking | May 2009 Control Plane Networking using E-NNI? λ GMPLS control plane ODU E-NNI 3R λ GMPLS control plane 3R CP architecture forcing Transponder duplication to cross domains

8 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 8 | GMPLS for Hybrid Optical Networking | May 2009 Control Plane Networking using E-NNI? λ GMPLS control plane ODU E-NNI 3R λ GMPLS control plane 3R λ E-NNI How to decide at the source node which E-NNI to use?

9 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 9 | GMPLS for Hybrid Optical Networking | May 2009 Control Plane Networking using E-NNI? λ GMPLS control plane ODU E-NNI 3R λ GMPLS control plane 3R λ E-NNI E-NNI Network abstraction does not allow to reliably decide which way to use: λ or ODU? How to decide at the source node which E-NNI to use? λ or ODU?

10 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 10 | GMPLS for Hybrid Optical Networking | May 2009 Control Plane Networking Integrated Control 3R Integrated GMPLS control plane 3R Shared knowledge of optical parameters and 3R resources 3R

11 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 11 | GMPLS for Hybrid Optical Networking | May 2009 GMPLS Implementation based on RFC 3945Generalized Multi-Protocol Label Switching Architecture 2

12 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 12 | GMPLS for Hybrid Optical Networking | May 2009 GMPLS Path computation Path restoration (functional scheme) Calculate Path Hard constraints: SRLG, opt. feasibility Soft Constraints: Cost, Wavelength Calculate Path Hard constraints: SRLG, opt. feasibility Soft Constraints: Cost, Wavelength Start Route found Route found Establish Path e2e Calculate Path Hard constraints: SRLG, opt. feasibility, 3R-Regen Soft Constraints: Cost, Wavelength Calculate Path Hard constraints: SRLG, opt. feasibility, 3R-Regen Soft Constraints: Cost, Wavelength Route found Route found Notify operator yes no yes

13 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 13 | GMPLS for Hybrid Optical Networking | May 2009 Routing Constraints Hard constraints are: Shared Risk Link Group: Diversity constraint imposed by Operator Transponder type (bit rate, modulation format, FEC type…): Optical Parameters: Wavelength available OSNR margin: remaining margin before reaching the OSNR Threshold NLE margin: remaining margin before reaching the Nonlinear Threshold PMD: accumulated PMD (also influencing the OSNR margin, by imposing a penalty) Soft constraints are: cost of link: parameter to prefer/avoid a link configured by the operator GMPLS parameters Optical parameters S T O c

14 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 14 | GMPLS for Hybrid Optical Networking | May 2009 Routing information: Link characteristic: OSNR, NLE, PMD, SRLG, cost Available TRBs: capacity, Modulation, tuning capability Available Regenerator sites Example Network Source Node Tail Node 3R S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c S T O c 3R site Shared Risk Link Group Transponder type Optical Parameters: : cost S T O c

15 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 15 | GMPLS for Hybrid Optical Networking | May R 1) Apply Unconstraint Dijkstra Algorithm: find all possible ways from Source to destination R

16 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 16 | GMPLS for Hybrid Optical Networking | May ) Apply optical constraints: remove all unfeasible path from the list NLE 1 OSNR Link1 PMD Link1 Section/OMS 1 Node1Node2Node3Node4 Path NLE 2 OSNR Link2 PMD Link2 NLE 3 OSNR Link3 PMD Link3 Section/OMS 2 Section/OMS opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: NOK

17 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 17 | GMPLS for Hybrid Optical Networking | May R 3) If list was empty: apply again Dijkstra Algorithm: find all possible ways from Source to destination considering intermediate 3R R

18 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 18 | GMPLS for Hybrid Optical Networking | May ) Apply optical constraints: remove all unfeasible path from the list NLE 1 OSNR Link1 PMD Link1 Section/OMS 1 Node1Node2Node3Node4 Path NLE 2 OSNR Link2 PMD Link2 NLE 3 OSNR Link3 PMD Link3 Section/OMS 2 Section/OMS 3 opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: OK NOK OK OK with regeneration

19 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 19 | GMPLS for Hybrid Optical Networking | May ) Optimization: Find path without tuning colors: Prioritize path without re-tuning opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: opt.-constraints: OK NOK OK c=5c=5 c=6 c=5 c=6 hard constraints soft constraints 3R

20 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 20 | GMPLS for Hybrid Optical Networking | May 2009 Summary Hybrid optical Networks must deal dynamically with 3R resources and optical parameters thereby integrating 2 layer information in one control plane Control plane concepts enforcing administrative boundaries are suitable for multi-vendor/multi-domain networks but are not cost efficiently address regeneration issues in single-vendor hybrid optical networks. Experience in deployed networks confirm that control plane performance is not critical.

21 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 21 | GMPLS for Hybrid Optical Networking | May 2009 Acknowledgements We acknowledge gratefully that part of this work has been supported by the German Ministry for Research and Education (BMBF) under the EUREKA project 100GET100Gbit/s Carrier-Grade Ethernet Transport Technologies (grant 01BP0720).

22 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 22 | GMPLS for Hybrid Optical Networking | May 2009 Material: Whats going on … 1.ITG-Fachtagung (Leipzig) May, : Implementation of GMPLS for Hybrid Optical Networking Gert Grammel 2.Sept, [Docs] [txt] [pdf] [WG] [ ] [Diff1] [Diff2] [Nits] Versions: (draft-ietf-ccamp-wavelength-switched-framework) Network Working Group Y. Lee (ed.) Internet Draft Huawei Intended status: Informational G. Bernstein (ed.) Expires: March 2010 Grotto Networking Wataru Imajuku NTT September 8, 2009 Framework for GMPLS and PCE Control of Wavelength Switched Optical Networks (WSON) draft-ietf-ccamp-rwa-wson-framework-03.txtDocstxtpdfWG Diff1Diff2Nitsdraft-ietf-ccamp-wavelength-switched-framework Oct, JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 27, NO. 19, OCTOBER 1, 2009; Accounting for Shared Regenerators in GMPLS-Controlled Translucent Optical Networks; Nicola Sambo, Alessio Giorgetti, Filippo Cugini, Nicola Andriolli, Luca Valcarenghi, Member, IEEE, and Piero Castoldi, Member, IEEE

23 All Rights Reserved © Alcatel-Lucent 2009, XXXXX 23 | GMPLS for Hybrid Optical Networking | May 2009


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