Model of impairment aware routing algorithm for Generalized Multi-Protocol Label Switching

This paper deals with impairment aware routing and wavelength assignment problem in all optical networks. It provides information about current state of the art of GMPLS impairment aware interface for patch computation. The paper gives suggestion to use OMNeT++ simulation tool for evaluation of routing and wavelength assignment problem especially in its enhanced version encompassing physical properties of fibers. The paper discusses nonexistence of models for simulations of impairment aware routing and wavelength assignment problem and thus suggests a model that could fulfill the gap. The model implementation is clearly described and mathematical evaluation of fiber model is provided. The evaluation is based on attenuation of fiber that causes optical signal to noise ratio (OSNR) and consequently bit error rate (BER) degradation. Evaluation is made using Artis OptSim simulator and OMNeT++. Measurement of BER is carried out using both simulators and results are compared. The correlation of results verifies that model is correct. The following discussion provides information about additional model extension and calculations of impairment aware routing and wavelength assignment problem for Generalized Multi-Protocol Label Switching framework.