Patent ID: 6456407
Filing Date: 2002-09-24
Classification: H04J,H04Q

Abstract:
An optical telecommunications network comprising several nodes (N1 to N4) interconnected by optical transmission paths that form several working rings (R1 to R5), each of which passes via every node, in which network information is transmitted at several different wavelengths, characterized in thatthe network comprises a group of nodes (N1 to N8) including N nodes, a group of working rings including N/2 working rings (R1 to R4), and a group of wavelengths including N/2 wavelengths (&lgr;1 to &lgr;4) in such a way that each node in the group of nodes is configured to receive signals at all the wavelengths in the group of wavelengths from only one of the rings in the group of rings, and to transmit at only one wavelength in the group of wavelengths at least to those rings in the group of rings from which that particular node does not receive signals.