Constraint-based routing across multi-domain optical WDM networks

We consider the problem of dynamic provisioning of an end-to-end optical path that is subject to certain user and network constraints and spanning multiple wavelength-routed WDM optical domains. We propose a hierarchical connection-provisioning algorithm for the computation and setup of the end-to-end constraint-based path. We present initial results for the QoS routing scheme with two constraints (cost and delay). We conduct simulation experiments using a discrete event simulation tool that we developed based on the described model in order to evaluate the effectiveness of the proposed scheme.