Alcatel

Alcatel Lucent

Jacques Bousquet

Guillaume Calot

Bertrand Duros

Philippe R Sehier

Cédric Baudoin

Jean Farineau

Xavier Denis

Tarif Zein Al-Abedeen

Cédric Lapaille

Christophe Gerrier

Yves Peligry

Francois Durnez

Herv&eacute; Radureau

Jean-Pierre Dehaene

Pierre Menard

Fran&ccedil;ois Durnez

Hervé Radureau

The invention relates to a method for the allocation of packets on a carrier containing timeslots, comprising the step of defining an interleaving length and an allocation window characterized in that packets are allocated within groups defined by the power needed for the transmission and that the size of groups is at most equal to the interleaving length.

Scheme for packet allocation in a radiocommunication system

The invention relates in particular to a TDMA transmission system including transmitters synchronized to a single receiver, each of the transmitters being able to transmit to the receiver on a given carrier frequency bursts with lengths which are all multiples of that of a unit burst including a guard time, the unit bursts including at least one guard time and the receiver being adapted to receive simultaneously bursts from different transmitters. According to the invention, each transmitter includes means for inserting a filler sequence into each burst to be transmitted at each location of the burst that is likely to correspond to a guard time in a burst received simultaneously on a different carrier frequency. The invention reduces the harmful effects of interference if the time of reception of the guard time of a burst on a first carrier frequency corresponds to the time of reception of information symbols in another burst received simultaneously on another carrier frequency.

Multipoint-to-point tdma transmission system using a particular burst structure, and a corresponding transmitter

The invention concerns a method of transmitting non-dated digital data between a transmitter and a receiver in which the data can take at least two different paths between the transmitter and the receiver and handover from one path to another occurs during transmission. In the transmitter, packets intended for the second path are transmitted only after the last packet intended for the first path has been transmitted and in the transmitter and in the receiver packets on the first or second path are delayed in order for packets on the second path to arrive after packets on the first path. It is therefore not necessary to transmit signaling to differentiate the two paths at the receiver, which can include a single demodulator.

Packet mode telecommunications method and system in which calls can be handed over from one path to another

A method of controlling power in a transmission link between a central station and a terminal in a point to multi-point communication network and system for carrying out the method, particularly suitable for implementation in satellite access networks or terrestrial point to multi-point access networks. A transmitter transmits a plurality of reference signals ( ) to a plurality of receivers ( ); each receiver ( ) measures the respective quality of the signals so as to determine a reference signal ( ) corresponding to the receiver ( ); each receiver ( ) indicates to the transmitter ( ) the reference signal ( ) corresponding thereto; and if required, the transmitter ( ) adjusts the power level of transmission of the traffic data ( ).

Method of controlling power in a transmission link between a transmitter and a receiver in a point to multi-point communication network and system for carrying out said method

The invention concerns a method of transmitting data from a plurality of sources ( ) to a plurality of receivers ( ) via a single gateway ( ) using at least two separate data transmission media ( ), said receivers ( ) being able to receive selectively data transmitted on any of said transmission media ( ), the method being characterized in that it assures dynamic distribution of said data to be transmitted to said transmission media ( ) in accordance with a global analysis of all of said data to be transmitted, signalling data ( ) regularly specifying to each of said receivers ( ) the transmission medium or media ( ) it is to use.

Method for transmitting on a plurality of transmission media, with dynamic data dispatching, and corresponding transmitter and terminal

Method for TDMA transmission on a plurality of carrier frequencies, corresponding signal and receiver

Communication method used in a shared resource transmission system

The invention concerns an antenna system including at least two antennas (,), each of said antennas (,) being capable of pointing independently of the other(s) in any direction within a solid angle. According to the invention, the antennas (,) are mounted on a common support (,) co-operating with rotation means (,) for rotating the common support (,), the rotation means (,) being activated to prevent masking of one of the antennas (,) by another of the antennas (,). The invention applies in particular to tracking non-geostationary satellites.

Antenna system, in particular for pointing at non-geostationary satellites

Method of locating a fixed terminal using a constellation of satellites

Growing community of inventors

Croissy sur Seine, France

Jacques Bousquet