End-to-end path protection considering four wave mixing in multi-domain WDM optical networks

In this paper, we have proposed an end-to-end path protection technique that includes the impact of four wave mixing (FWM) on the connections established in a multi-domain optical WDM network. Earlier, survivability schemes were implemented with the assumption that the physical layer conditions are ideal in nature. However, in long haul WDM connections FWM affects the quality of transmission in a fiber. Therefore, the optical connections that generates erroneous data needs to be discarded so that only flawless connections are established. Further, most of the proposed schemes in the literature considered optical networks as a single domain network, whereas most of the real backbone networks are of multiple domains, each having separate physical area with independent policies. Here we first present the above issues as an Integer Linear programming (ILP) problem. We then develop an end-to-end path protection algorithm that considers the effect of FWM for error free transmission and the issue of domain separation in a multi-domain optical network. Simulation results show that our proposed scheme establishes connections eluding FWM noise and has better resource utilization compared to that of the existing popular schemes. © 2013 Optical Society of India.