Patent ID: 7224895

Claim:
A method for managing traffic protection in an Optical Multiplex Section-Shared Protection Ring (OMS-SPRing) network in case of failure to a span of an installed path, said network comprising network elements connected one to each other through fiber spans in a ring configuration, said fiber spans comprising working wavelengths for transporting high priority traffic and protecting wavelengths for transporting low priority traffic, wherein said method comprises the steps of: providing the installed path according to a wavelength interchange mechanism allocating different wavelengths between an input fiber and an output fiber of at least one network element of the installed path; implementing a ring Span Switch action by an Optical Multiplex Section-Shared Protection mechanism; re-routing a data flow of the installed path using the protecting wavelength corresponding to the working wavelength of the failed span, wherein a further span is affected by a failure and a ring switch near end protection process is provided, wherein the method comprises the step of selecting one between two spans affected by a failure to define a selected failed span and the step of re-routing the data flow of the wavelength interchanged path using the protecting wavelength corresponding to the working wavelength of the selected failed span.