With increasing demand for high capacity mobile data services and a simultaneous decline in revenue per bit, network operators face the challenge of providing high capacity while reducing overall network costs. A key aspect within Passive Optical Networks is the implementation of simple monitoring strategy on the physical layer which gives the possibility for the operator to save a signicant amount of operation and maintenance expenses (OpEx). In this framework, we propose an emerging and promising technique, i.e. Optical Frequency Domain Reflectometry, in order to localize any kind of...