Alcatel Lucent

Alcatel

Geert Bert Maarten Ysebaert

Jan Sylvia Verlinden

Etienne André Hubert Van Den Bogaert

Marc Suzanne Paul Moonen

Katleen Peggie Florimond Van Acker

Tom Bostoen

Frank Cyriel Michel Defoort

Marc Fossion

Piet Vandaele

Raphaël Jean Cendrillon

Peter Luyten

Gert Gaston Delphinus Cuypers

Piet Michel Albert Vandaele

Zoltan Balint

Cyriel Michel Defoort Frank

Katleen Van Acker

Igor Popov

A device for mitigating effects of impulse noise on data packet transfer over a communication line is configured at least partially according to physical layer characteristics of the communication line. As an example, a data packet retransmission device might be configured to retransmit in response to each retransmission request an amount of data packets depending on the physical layer interleaving delay ID and/or data bit rate DBR.

Device and method for mitigating effects of impulse noise on data packet transfer

The present invention relates to a wired transmission line testing method for determining at least one physical characteristic of a wired transmission line where the wired transmission line is coupled between a first line transceiver device and a second transceiver device. The wired transmission line testing method first comprises the steps of a first transceiver sending a first known excitation signal over the wired transmission line and subsequently the step of the first transceiver and the second transceiver both generating a first representation of a received signal respectively including reflected or forwarded portions of the known excitation signal and third a processing part deriving at least one physical characteristic of the wired transmission line based on the first representations generated by the first transceiver and the second transceiver. Furthermore, the wired transmission line testing method may comprise the additional steps of the second transceiver sending a second known excitation signal, then first transceiver and second transceiver both generating a second representation of a received signal respectively including forwarded or reflected portions of the second known excitation signal and the processing part deriving the at least one physical characteristic of the wired transmission line based on the first and second representations generated by the first transceiver and the second transceiver.

Wired transmission line testing method

A transmitter device () and associated receiver device () providing a retransmission scheme for use in communications involving lossy media. The transmitter device () receives data packets () from a source and adds protection to selected subflows before delivering () them to the receiver device (). The receiver device () is able to remove the protection and process () the data packets further. The retransmission scheme introduces greater reliability on the lossy medium by restricting the retransmission () to a particular link and to selected subflows of traffic in the connection between a source and a destination.

Retransmission scheme for lossy media

A method for determining at least one operational transmit power Sover a communication channel (L) coupled to a disturbance causing transceiver (n) for at least one tone (k), comprises the steps of provision of at least one reference victim communication channel (L) for representing at least one reference victim for all victim communication channels which are degraded by cross-talk interferences by said communication channel (L), and maximizing the data rate (R) over said at least one reference victim communication channel (L) under the constraint that the data rate over said communication channel (L) achieves a target rate (R) without exceeding a power constraint (P).

Power spectrum control method for communication channels limited by disturbers and apparatus for performing such a method

The present invention relates to a method for determining a transmit PSD over a remotely-deployed line, which method comprising the steps of: A method according to the invention further comprises the steps of: The present invention also relates to a power control unit.

Method and apparatus for determining a transmit PSD at a remote location

A multicarrier receiver which receives a cyclically extended multicarrier symbol which is in a serial format is provided. The multicarrier receiver includes a serial to parallel converter, a window which decreases spectral side lobes of the multicarrier symbol and outputs a windowed multicarrier symbol, a difference term generating unit which generates difference terms from the multicarrier symbol in parallel format, a first Fourier transformer which fast Fourier transforms a single carrier of the windowed multicarrier symbol for all carriers of the windowed multicarrier symbol and outputs a first Fourier transformed carrier, a second Fourier transformer which fast Fourier transforms difference terms, and a per-carrier frequency domain equalizer which equalizes all frequencies by deriving necessary fast Fourier transforms utilizing linear combinations of the first fast Fourier transformed carrier, one or more non-windowed fast Fourier transformed carriers from the second Fourier transformer and the difference terms.

Multicarrier receiver

Growing community of inventors

Winksele, Belgium

Geert Bert Maarten Ysebaert