Mitsubishi Electric Corporation

Mitsubishi Electric R&d Centre Europe B.v.

Olivier Weppe

Gwillerm Froc

Eric Lavillonniere

For determining equalization parameters for performing equalization for optical signals transmitted by a first device to a second device via an optical band-pass filter, the second device being configured for receiving optical signals output by said optical band-pass filter and transmitted by the first device on a carrier wavelength when said carrier wavelength is comprised in the passband of the optical band-pass filter, said carrier wavelength and/or said passband of the optical band-pass filter being a priori unknown, a monitoring device performs: determining information representative of a level of detuning between the carrier wavelength of the optical signals and the nominal wavelength of the optical band-pass filter; and determining said equalization parameters, on the basis of said determined information representative of the level of detuning between the carrier wavelength of the optical signals and the nominal wavelength of the optical band-pass filter.

Method and monitoring device for determining equalization parameters, computer program, information storage means

For determining whether a configuration of an optical transmission interface of a first device has to be adjusted for transmitting optical signals to a second device via an optical band-pass filter, the second device having an optical reception interface configured to enable receiving optical signals output by said optical band-pass filter and transmitted by the first device on a carrier wavelength when said carrier wavelength is comprised in the passband of the optical band-pass filter, said carrier wavelength and/or said passband of the optical band-pass filter being a priori unknown, a monitoring device performs: monitoring an evolution of a difference level between codewords received by the second device via said optical signals and corresponding codewords transmitted by the first device; and determining whether the configuration of the optical transmission interface of the first device has to be adjusted, on the basis of said monitoring.

Method and device for determining whether a configuration of an optical transmission interface has to be adjusted and the configuring thereof

A method for determining whether a configuration of an optical transmission interface of a first device has to be adjusted for transmitting an optical signal to a second device via an optical band-pass filter, the second device including an optical reception interface configured to enable receiving optical signals output by said optical band-pass filter and transmitted by the first device on a carrier wavelength when the carrier wavelength is in the passband of the optical band-pass filter. A monitoring device performs: obtaining an information representative of a time drift between successive symbols of an optical signal received by the second device, from the first device, via the optical band-pass filter; and determining whether the configuration of the optical transmission interface of the first device has to be adjusted, on the basis of the information representative of the time drift.

Method and device for determining whether a configuration of an optical transmission interface has to be adjusted

A method for determining whether a configuration of an optical transmission interface of a first device has to be adjusted for transmitting an optical signal to a second device via an optical band-pass filter, the second device including an optical reception interface configured to enable receiving optical signals output by the optical band-pass filter and transmitted by the first device on a carrier wavelength when the carrier wavelength is included in the passband of the optical band-pass filter. A monitoring device performs: obtaining an information representative of a signal temporal shape corresponding to a symbol of an optical signal received by the second device, from the first device, via the optical band-pass filter; determining whether the configuration of the optical transmission interface of the first device has to be adjusted, on the basis of the information representative of the signal temporal shape.

A Passive Optical Network (PON) comprises at least a first sub-network () with a first Optical Line Terminal () and a first set of Optical Network Units (), a second sub-network () with a second Optical Line Terminal () and a second set of Optical Network Units () interconnected to a same splitter (). In downlink direction from Optical Line Terminals to Optical Network Units, each sub-network uses a different wavelength (&#x3bb;) and in uplink direction all ONUs () are able to access all Optical Line Terminals through an uplink TDMA access by using one single wavelength (&#x3bb;). The dynamic transmission resources allocation units of all Optical Line Terminals have the same process and coordination of the uplink TDMA access is carried out by sending () from a determined master Optical Network Unit to the other Optical Line Terminals different from its associated Optical Line Terminal an echoed synchronization message containing synchronization information related to its corresponding Optical Line Terminal referred as master Optical Line Terminal.

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Rennes, France

Olivier Weppe