The Links Only for Protection with the Accurate Methods of the Finite Differences

In this paper, we considered the wavelength division multiplexing (WDM) optical networks that transmit large quantities of data. These networks need to be maintained fault-free at all times of their operation so the protection and restoration strategies are critical to provide optical network survivability from a variety of failure scenarios that can occur in this environment. Any failure may cause the failure of several optical channels and led to large data losses. This study examines the finite differences methods (linear and polynomial accurate) which are used to study the problem of the links only for protection and the restoration is executed dynamically.