Methods and apparatuses for supervision of optical networks

摘要

Methods and apparatuses for enabling supervision of fibers in an optical communication network, where a Central Office provides data signals to a Remote Node for distribution to Optical Network Terminals (ONTs). The Central Office generates and sends test signals of different monitoring wavelengths associated to predefined groups of said ONTs, to the Remote Node. The Remote Node routes each test signal to a corresponding associated group of ONTs according to the wavelength of the test signal. When receiving a back-scattered and back-reflected test signal caused by a faulty optical fiber, the Central Office is able to identify the faulty optical fiber based on the wavelength of the back-scattered and back-reflected signal.

主权项

1. A method in a Central Office providing data signals over a feeder fibre to Optical Network Terminals (ONTs), in an optical communication network, the data signals being distributed to the ONTs by a Remote Node communicatively coupled to the Central Office, for enabling supervision of optical fibres in the optical communication network, the method comprising:
creating test signals of different monitoring wavelengths associated to predefined groups of said ONTs, each group comprising a plurality of ONTs; and sending the created test signals to the Remote Node, thereby enabling the Remote Node to route said test signals to corresponding associated groups of ONTs according to the wavelengths of the test signals, said monitoring wavelengths including a first component being an integer multiple of a separation parameter (nFSR) configured in the Remote Node for routing the test signals to said groups of ONTs, wherein a received backscattered and back-reflected test signal caused by a faulty optical fibre is used for identifying the faulty optical fibre based on the wavelength, including a combination of the first and a second component, of the back-scattered and back-reflected signal.