Alcatel Lucent

Alcatel

Luc Delamotte

Laurent Roullet

Jean Bouin

R&eacute;gis Lenormand

Philippe Voisin

Christian Rigal

Eric Belis

David Niddam

Muriel Aveline

Régis Lenormand

Claude Argagnon

Pascal Wuilque

Mickael Haddad

Rémi Schneegans

G&eacute;rald Chretien

A device (D) for compression of streams of packets of data, for a communication equipment (E) constituting a transmission end point in an Internet Protocol communication network (R), the packets of a stream each comprising, in particular, an IP header including a destination end point (E) identifier, a session identifier and stream attributes, and said packets being intended to be transmitted after decomposition into cells. This compression device (D) comprises processing means (MT) responsible, if they receive a packet of a stream, for determining if the IP header of the packet can be compressed as a function of at least one chosen criterion, and for determining if the compression can lead to a reduction in the number of cells having to result from the decomposition of that packet.

Compression device wherein compression is adapted as a function of the transport medium, and associated decompression device, for communication equipments

A relay for use in telecommunications equipment, said relay comprising:

Relay including a mass memory for temporarily storing differed-time information streams

The invention concerns a method of communication between ground stations via satellites traveling around the Earth and forming part of a constellation overflying at least a major portion of the Earth, each ground station communicating during a particular time with a given satellite of the constellation. Two ground stations communicate via respective given satellites with which the stations are respectively communicating. To minimize the control means on board each satellite, the two satellites communicate via a predetermined communications link. A link of the above kind generally comprises one or more predetermined satellites.

Method of communication between earth stations using a constellation of satellites

A satellite for a satellite telecommunication system transmits signals at different powers on the downlink connection. The powers are chosen to limit the relative dynamic range of signals received on the downlink connection. The relative dynamic range of signals received on the downlink connection is advantageously less than 5 dB and preferably less than 2 dB. A digital processor circuit is used, together with an analog-digital converter, a circuit taking the fast Fourier transform of the converted signals, a circuit for monitoring the gain of the signals, a circuit for switching the signals to at least two amplifier subsystems each including an inverse fast Fourier transform circuit, a digital-analog converter and a power amplifier.

Dynamic compensation of signals for space telecommunication repeaters

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Toulouse, France

Luc Delamotte