The invention discloses a non-blocking extended
system and method based on multiple non-intersected unidirectional
fiber ring networks, and the
system comprises an input stage, a central stage, and an output stage, wherein the input stage and the output stage respectively consists of a space division switching modules. The central stage consists of a plurality of non-intersected
wavelength division switching modules comprising unidirectional
fiber ring networks, and allows any mapping from input to output. The connection of unidirectional
fiber rings of the central stage accords with the basic features of a
Clos network, and the central stage is in one-one connection with the input and output stages through fiber ports. The number n of module ports of the input is consistent with the number n of module ports of the output stages, wherein n is not greater than the number M of switching modules of the central stage. The invention also provides a specific implementation method for completing the non-blocking extension through employing the
system. The method and system increase the network capacity efficiently at low cost, employs
all fiber link resources flexibly and effectively, improve the
utilization rate of
wavelength resources in a network, reduce the blocking rate of the network, and facilitate the implementation of a high-performance optical network in the future.