Routing and Wavelength Assignment Information Model for Wavelength Switched Optical Networks

This RFC 7446 was published in 2015.

Abstract

This document provides a model of information needed by the Routing and Wavelength Assignment (RWA) process in Wavelength Switched Optical Networks (WSONs).
The purpose of the information described in this model is to facilitate constrained optical path computation in WSONs.
This model takes into account compatibility constraints between WSON signal attributes and network elements but does not include constraints due to optical impairments.
Aspects of this information that may be of use to other technologies utilizing a GMPLS control plane are discussed.

RFC 7446 introduction

The purpose of the WSON information model described in this document is to facilitate constrained optical path computation, and as such it is not a general-purpose network management information model.
This constraint is frequently referred to as the "wavelength continuity" constraint, and the corresponding constrained optical path computation is known as the Routing and Wavelength Assignment (RWA) problem.
Hence, the information model must provide sufficient topology and wavelength restriction and availability information to support this computation.
More details on the RWA process and WSON subsystems and their properties can be found in [RFC6163].
The model defined here includes constraints between WSON signal attributes and network elements but does not include optical impairments.

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