Alcatel Espace

Alcatel Lucent

Alcatel

Nokia Technologies Oy

Alcatel N.v.

Centre National Detudes Spatiales

Alcatel Lecent

Denis Rouffet

Frederic Berthault

Yannick Tanguy

Michel Mazzella

Guillaume Calot

Jean-Claude Faye

Alain Feniou

Cyril Michel

Chan-Byoung Chae

Doru Calin

Luc Dartois

Veronique Capdevielle

Bernd Haberland

Alistair Urie

Kai Yang

Simon Yiu

Michel Cohen

Andreas Pascht

Jérôme Brouet

Hang Nguyen

Herve Maillard

Didier Casasoprana

Jens Strauss

Anne Sauvageot

Jean-Francois Dulck

Robert Mort

Gerard Boucheret

Alain Bailly

Anne Magnier

Gerald Sebastien

Hervé Maillard

A method, in abase station of a wireless telecommunications system comprising multiple radiating elements, the method comprising modifying a number of uplink or downlink information streams, each information stream corresponding to an element in a space sampling basis for the system, wherein, in the downlink, the space sampling basis is configured so that the number of information streams is the same as the number of radiating elements of the system, and in the uplink, the space sampling basis is configured using a composite antenna derived from multiple radiating elements of the system to form a synthesised beam.

Modifying a number of uplink or downlink information streams

Example embodiments are directed to methods of reducing interference in a communication system. In at least one example embodiment, a method includes first determining, by a first transmitter having a multi-directional antenna configured to produce a plurality of beams, at least one interference level of at least one interfering beam of a plurality of beams of at least one transmitter in the communication system, second determining a transmitting beam pattern based on the interference level, the transmitting beam pattern indicating a sequence of illuminating the plurality of beams at corresponding time slots, third determining a fractional frequency reuse pattern based on the transmitting beam pattern, and transmitting data based on the transmitting beam pattern and the frequency reuse pattern.

Methods for reducing interference in a communication system

A method is dedicated to the opening of a communication session between a radio terminal (MS), connected to a radio network (R) and a fixed communication terminal (TC), coupled to at least one target screen (EC) and connected to a communication network (R). This method consists in sending, by means of the radio terminal (MS), an identifier displayed on the target screen (EC) to open a communication session between the said radio terminal (MS) and the fixed communication terminal (TC), and then to control display of the information on the target screen (EC) by means of the radio terminal (MS).

Method for opening communication sessions for remote control by a radio terminal of the display of information on a screen, and associated server

The present invention relates to a method for configuring a base station () of a mobile communication network over a software defined radio module (), that base station () serving at least one mobile terminal () over an air interface () served by that software defined radio module. When selecting the communication standard for the configuration of the base station () the characteristics of the air interface () are taken into account. The invention also relates to a base station () of a mobile communication network, that base station () serving at least one mobile terminal () over an air interface (), that base station () comprising a configurable software defined radio module (). The configurable software defined radio module () is adapted to take into account the characteristics of the air interface () when selecting the communication standard for the configuration of the base station ().

Software defined radio base station and configuration method

The present invention comprises a method for communicating in a wireless communication network () comprising a number of cells () served by respective base stations (). According to the proposed method, the following steps are performed: splitting up one at least one of a frequency bandwidth and a time interval allocated to the communication in at least a first part and a second part; using said first part for communication according to a first reuse scheme; and using said second part for communication according to a second reuse scheme.

Communication method, base station, and user terminal for a wireless communication network

A method of transmitting data between a content server () and a terminal () belonging to a discontinuous coverage network, the terminal () moving from a first radio coverage area () to a second radio coverage area () over an area () comprising no radio coverage. The method includes: terminating () one or more protocols used by the content server () for the data transmission with the terminal () within a proxy, wherein the proxy is seen as the entry point of the discontinuous coverage network by the content server (), and using a caching mechanism provided within the discontinuous coverage network for forwarding () data from the proxy to the terminal ().

Method of transmitting data and network

For ensuring a low cost transport of signals in a radio network, in particular with a high density of radio access points, a method is proposed, where the signals are transported over wires between a base station and radio access points, comprising the steps of: Further proposed are a radio head and a radio controller both adapted to the present method.

Method for transporting a signal in a radio network

The invention refers to a method for establishing a radio connection () for transmitting and receiving data across one of a plurality of radio interfaces () of a mobile radio telecommunication terminal (). The multiple radio interfaces () serve for data transmission and reception across radio connections () according to various radio protocols within different sub-radio access networks (). The coverage of sub-radio access networks () is determined and the radio connection () is established across at least one of the available sub-radio access networks (). In order to establish a radio connection () for transmitting and receiving data across one of the plurality of radio interfaces () of the mobile radio telecommunication terminal () more efficiently without waste of energy and waste of bandwidth on the radio connections () the necessity for a determination of sub-radio access network () coverage is established and coverage of the sub-radio access networks () is determined only if determination of sub-radio access network () coverage is deemed to be necessary.

Method for selecting one of a plurality of radio interfaces of a mobile radio telecommunication terminal

The present invention relates to a method for selecting another access network when transmitting data from a content server to a terminal in a multi access network environment comprising a discontinuous coverage radio access network. According to the present invention, the method comprises the step of:

Method for improving access network selection in the context of discontinuous coverage access networks, corresponding access controller, and corresponding multicast element

A communication system comprising a set of non-geostationary satellites provides communication links between ground stations and terminals, a communication link from a particular station via a satellite terminating at associated terminals in a limited geographical area including the station and providing a communication channel to at least some of the associated terminals. The communication link is switched to another satellite during the process of communication link handover. A communication link between a particular station and its associated terminals includes an additional communication channel which enables advance data to be transmitted between the particular station and a terminal before the latter executes a communication link handover. This data masks any interruption of communication caused by the communication link handover.

Non-geostationary satellite communication systems, and station and

In a method of handing off traffic in a low orbit satellite communication system serving terminals, a terminal being connected to a terrestrial communication network by means of a connection station, handing off of the satellite-terminal and satellite-connection station links is possible only within a particular area. The decision to hand off the traffic is based on deterioration of the quality of service and of the radio environment for a group of terminals of said area. The system for implementing this method includes transmit/receive terminals and terrestrial connection stations.

Method of handing off traffic in a low orbit satellite communication

The invention provides a method of switching a call set up between a first station and a second station from a current propagation path to a following propagation path. The method includes the following steps:

Method of switching a channel from a first propagation path to a second

In a telecommunication network, the power of a first signal transmitted via a satellite by a first station to be received in the form of a second signal by a second station is regulated. At a given time, a value representative of a signal-to-noise ratio of the second signal is predicted for a later time, and, at an intermediate time, the power of the first signal is regulated in the first station as a function of the predicted value. The intermediate time precedes the later time by a time period substantially equal to the propagation time between the first and second stations.

Method of regulating the power of a signal transmitted by a first

The invention provides a method of regulating the power of transmission between first and second stations in a multiple satellite visibility satellite telecommunication network. The method comprises the following cyclic steps: regulation, for each of said N channels, of an isolated transmit power level command signal such that when it commands the power at which the first station transmits the first isolated signal in each channel the quality level of the corresponding isolated second signal received by the second station is equal to a reference quality level, and regulation, for all of the N channels, of N combined transmit power level command signals such that when they command the levels at which the first station respectively transmits the N first combined signals on the N channels the quality level of the global signal received formed from the N combined second signals is equal to the reference quality level. Depending on whether the isolated command signal having the minimal level is such that this minimal level is less than or greater than a maximal tolerated isolated command level, the minimal level isolated command signal is selected to command the power with which the first station transmits a call signal in the corresponding channel, or the N combined command signals are selected to command the power with which the first station transmits respective combined call signals on the N channels.

Method of power regulation in a satellite telecommunication network with

The present invention relates to a communications system between low-orbit satellites and terminals, in which the beams (12) of each service area (14) are illuminated according to a beam-hopping spatial scanning. For each satellite and for each terminal transmission and reception are separated in time and synchronized. Time-division duplex is used. Applicable especially to the field of space telecommunications.

Growing community of inventors

Boulogne-Billancourt, France

Denis Rouffet