1. [1] Y. Lee, G. Bernstein, and W. Imajuku, “Framework for GMPLS and path computation element (PCE) of wavelength switched optical networks (WSONs),” IETF, RFC 6163, April 2011.
2. Issues for routing in the optical layer
3. [3] “Architecture of optical transport networks,” ITU-T recommendation G.827, Feb. 1999.
4. Sparse Regeneration in Translucent Wavelength-Routed Optical Networks: Architecture, Network Design and Wavelength Routing
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