Optical network structure

摘要

An optical ring network structure comprising two or more network elements, and a single optical fiber connection between each pair of neighboring network elements for carrying an optical signal, wherein the ring network structure is arranged in a manner such that, in use, band allocation utilizing multiplexing on each single fiber connection is chosen in a manner such that groups of wavelengths for bi-directional data transfer and for bi-directional redundant data transfer for protection respectively are provided on each single fiber connection.