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Research on Wavelength Switched Optical Networks for the Next 10 years ICT

Research on Wavelength Switched Optical Networks for the Next 10 years ICT. Session 1 of PhD Academy. Oct. 05, 2011. Xin WANG TANAKA Lab. Waseda University. Outline. Background GMPLS based WSON Architecture Control Plane in WSON Research Cases. 1. Background.

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Research on Wavelength Switched Optical Networks for the Next 10 years ICT

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  1. Research on Wavelength Switched Optical Networks for the Next 10 years ICT Session 1 of PhD Academy Oct. 05, 2011 Xin WANG TANAKA Lab. Waseda University

  2. Outline • Background • GMPLS based WSON Architecture • Control Plane in WSON • Research Cases

  3. 1. Background • Optical network evaluation: opaque  translucent transparent; • Limitations: physical layer impairments(PLIs), technology and expenditures; • Study network scenario: translucent WDM networks. • Wavelength Switched Optical Network (WSON, RFC 6163); • Generalized Multi-Protocol Label Switching (GMPLS, RFC 3945); Transparency O/E/O At several sites, the signal will undergo an O/E/O conversion O/E/O O/E/O O/E/O O/E/O At each site, the optical signal will undergo an O/E/O conversion O/E/O O/E/O Time Fig. 1 Optical network evaluation WDM router Optical link (fibres) Optical-electronic-optical O/E/O

  4. 2. GMPLS based WSON Architecture • Optical control plane locates between management plane and data plane，i.e, Fig. 2. • Data plane includes: • MUX/DMUX; • OXC; • O/E transponders; • 3R (Reamplifying, Reshaping and Retiming) regenerator pool: • 3R regenerator shown in Fig. 3. • GMPLS optical control plane: • OSPF-TE; • RSVP-TE; • LMP, etc. • Routing, wavelength assignment and 3R regenerator allocation; • Centralized vs. Distributed. DMUX MUX Management Plane … … … … Optical Control Plane Data plane DMUX MUX … … OXC … … … … O/E O/E 3R Module Pool … Add Drop … Fig. 3 O/E/O 3R regenerator model Fig. 2 WSON operating layer

  5. 3. Control Plane – centralized mode Central Node (PCE) • Advantages: • Simple; • No conflict. • Drawbacks: • No scalability; • Require real time state info. RWA TED Extended OSPF-TE RSVP-TE …… OCP OCP OCP Node 1 Node 2 Node n Fig. 5 Centralized control plane

  6. 3. Control Plane – distributed mode (PCE) RWA TED Extended RSVP-TE Extended OSPF-TE • Advantages: • Scalable; • Robust; • Drawbacks: • Conflict; • Contention; • Set-up delay. …… OCP OCP OCP Node 1 Node 2 Node n Fig. 6 Distributed control plane

  7. 4. Research Cases Table. 1 RWA processing scheme in WSON

  8. Thank you! Q&A

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