Flexible and economic Metro / Access Ring architecture

摘要

An optical fiber ring having a plurality of passive ring nodes and an active ring node with a switch to interrupt or close the fiber ring, wherein the passive ring nodes are configured to connect an optical feeder section to each direction of the fiber ring and wherein arbitrary wavelengths signals generated in a feeder section can be distributed to all other ring nodes and feeder sections and wherein receivers in the feeder sections are configured to select an arbitrary number of wavelength signals in receiving direction.