Alcatel Lucent

Alcatel

Heinz-Georg Krimmel

Harald Schmuck

An exemplary method and apparatus are provided for transferring data from a central unit in a network to a subscriber-sided network termination unit via a distribution network that connects the central unit with the subscriber-sided network termination unit and multiple of other subscriber-sided network termination units. Measures for providing correct data transmissions, such as scrambling or forward error correction, are applied to the data for the single subscriber-sided network termination unit before the data are combined with data for other subscriber-sided network termination units. As a consequence, there is no longer a need to completely process the transferred data at each and every subscriber-sided network termination unit.

Method for discontinuously transferring data in a point-to-multipoint access network, central unit, and network termination unit

The invention concerns a method as a pre-condition for a gain control of an optical amplifier that amplifies a whole signal out of a multiple of optical signals and where each of these signals includes regular gaps, in which these optical signals are synchronized with respect to each other such that the gaps coincide, as well as a tree-shaped optical access network, a central station, and a terminal.

Method as a pre-condition for a gain control, optical access network, central station and terminal

The invention relates to a method of operating a passive optical network. The passive optical network comprises an optical line termination being connected via optical fibers to a number of network terminations. The method comprises the step of generating an optical signal to be transmitted on one of the optical fibers comprising a number of signal states. The method is characterized in that the number of signal states is changed.

Method of operating a passive optical network

A method for operating a passive optical network transmitting sub-frames of data arranged in a common transmission frame in at least two signalling modes from an optical line termination to a plurality of optical network units comprises the step of arranging first sub-frames of data to be transmitted in a first signalling mode which requires lower specifications of the optical network units ahead of second sub-frames of data to be transmitted in a second signalling mode which requires higher specifications of the optical network units. The invention is also realized in an optical line termination which comprises means for performing the method, a passive optical network equipped with such an optical line termination, and a corresponding transmission frame structure.

Method for operating a massive optical network, optical line termination and transmission frame structure

This invention relates to a method for monitoring at least one section () of an optical fiber link (), preferably a distribution section behind a passive distribution node (-), of a passive Optical Network, and a passive Optical Network being designed to perform the steps of the method. The method is comprising the steps of:&#x2014;sending a first optical monitoring signal () through said section at a first signal sending time by sending means () of a first transceiver device (-) of the passive Optical Network,&#x2014;sending at least a second optical monitoring signal (-) through said section at a second signal sending time by sending means () of a second transceiver device (-) of the passive Optical Network, wherein the sending times of said optical monitoring signals (-), preferably Optical Time Domain Reflectometry Signals, are coordinated in such a way that the optical monitoring signals (-) are superimposed while travelling through said section, building a measuring signal (), and&#x2014;detecting and analysing characteristics of at least parts of said measuring signal () preferably by at least one of the optical monitoring signal sending transceiver devices (-).

Passive optical network monitoring method and passive optical network

The invention relates to a method for the reflectometric testing of an optical transmission line from an optical transmission and reception device, in which a test signal is fed into the transmission line from the direction of the optical transmission and reception device and the signal reflected back to the optical transmission and reception device is analysed, in which the transmission device provided for transmitting the useful signal is also used as the transmitter of the test signal by switching it from transmission mode to test mode, and the transmission device itself is used as the receiver of the reflected signal, as well as to an optical device and to an optical transmission and reception device therefore.

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Korntal-Münchingen, Germany

Heinz-Georg Krimmel