Architecture de réseau en boucle de transmission à accès multiple par routage spectral.

摘要

The network includes a number of stations (S1-S3) which are distributed around a closed optical loop (30) and recover information by extraction and insertion of the wavelength assigned to each. A secondary loop (BS) has two access nodes (N1,N2) on a transmission line (LT) or arc of a main loop. The information from these nodes is carried on different wavelengths. The loop includes an emergency optical fibre (31) and is completely protected against failure of either node. For data reception, a station chooses one of the two wavelengths on the normal loop, or in the emergency loop if the other is broken.