Abstract: The invention relates to a telecommunications method in which multidestination information is transmitted from a terminal or from a server to a plurality of destinations using a protocol of the same type as the Internet Protocol (IP), and a control unit, such as a router, is provided to detect the presence of at least one destination. One destination or at most a limited number of destinations (72) is assigned a group representative function. That destination periodically sends a presence signal (62) to the control unit (54). The method can be used in a satellite telecommunications system. It requires less signaling than the IGMP.

Abstract: A satellite telecommunication system includes a plurality of user stations and at least one satellite. A resource manager for the satellite telecommunication system includes a congestion controller that assigns resources to uplinks, a demand assignment device that assigns resources to uplinks, and, for each satellite, a central entity that includes a subsystem of the congestion controller adapted to receive requests sent by user stations using the satellite, each request expressing the bit rate necessary for a group of connections supported by a user station and by the same downlink of the satellite, and to determine the bit rate authorized for the group of connections. It further includes, for each satellite, a subsystem of the demand assignment device adapted to allocate resources to an uplink, at each user station, as a function of the bit rates authorized by the congestion controller subsystem and globally for all connections supported by the user station.

Abstract: A resource manager for a satellite telecommunication system including user terminals sending data to spots via a satellite, all data streams from a given terminal to the same given destination spot constituting a virtual path comprising a set of uplinks from the terminal to the satellite and a set of downlinks from the satellite to the spot, includes a central entity associated with each satellite for receiving requests sent by the user terminals and each expressing a requirement to use resources of the satellite corresponding to the virtual path. The central entity groups the requests into request groups each associated with a set of uplinks from the same spot to the destination spot, the set of uplinks constituting a virtual link, and determines authorized resources for each request group.

Abstract: A device (D) is dedicated to processsing data frames for satellite terminals (ST) of a satellite communication network, connected to at least one logical bus (B) defined on a satellite connection. The device (D) comprises processing means (MT) adapted, on receiving packets of a data frame from a first communication equipment (UE11), connected to a first satellite terminal (ST1) coupled to said device (D), and addressed to a second communication equipment (UE2), connected to a second satellite terminal (ST2), to encapsulate each packet received in a level 2 transmisstion protocol header (of the ISO layered model) comprising at least the identifier of the bus to which the second satellite terminal (ST2) is connected and the communication identifier of the first satellite terminal (ST1), before it is transmitted to the satellite (SAT), via the connection.

Abstract: The invention relates to a telecommunications method in which multidestination information is transmitted from a terminal or from a server to a plurality of destinations using a protocol of the same type as the Internet Protocol (IP), and a control unit, such as a router, is provided to detect the presence of at least one destination. One destination or at most a limited number of destinations (72) is assigned a group representative function. That destination periodically sends a presence signal (62) to the control unit (54). The method can be used in a satellite telecommunications system. It requires less signaling than the IGMP.

Abstract: 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.

Abstract: A resource manager for a satellite telecommunication system including user terminals sending data to spots via a satellite, all data streams from a given terminal to the same given destination spot constituting a virtual path comprising a set of uplinks from the terminal to the satellite and a set of downlinks from the satellite to the spot, includes a central entity associated with each satellite for receiving requests sent by the user terminals and each expressing a requirement to use resources of the satellite corresponding to the virtual path. The central entity groups the requests into request groups each associated with a set of uplinks from the same spot to the destination spot, the set of uplinks constituting a virtual link, and determines authorized resources for each request group.

Abstract: A satellite telecommunication system includes a plurality of user stations and at least one satellite. A resource manager for the satellite telecommunication system includes a congestion controller that assigns resources to uplinks, a demand assignment device that assigns resources to uplinks, and, for each satellite, a central entity that includes a subsystem of the congestion controller adapted to receive requests sent by user stations using the satellite, each request expressing the bit rate necessary for a group of connections supported by a user station and by the same downlink of the satellite, and to determine the bit rate authorized for the group of connections. It further includes, for each satellite, a subsystem of the demand assignment device adapted to allocate resources to an uplink, at each user station, as a function of the bit rates authorized by the congestion controller subsystem and globally for all connections supported by the user station.

Abstract: This invention relates to a method for allocating a resource in a periodic frame of an asynchronous digital satellite network, to each of cell bursts of sporadic connections which are transmitted by earth stations. Allocation requests for resources, such as a time intervals in a data sub-frame of a frame, are respectively transmitted by an earth station to a central network management station, from beginnings of reception of the bursts and therefore well before the earth station has completely received said bursts coming from an user station. Each of the resource allocation requests relating to the bursts of a connection is satisfied since the request does not comprise any information on lengths of bursts. Thus, during a connection phase, acceptance or refusal of a connection request is decided as a function of an algorithm avoiding overloading of the network and slumping of its performances.

Abstract: The invention concerns a protocol for multiple access to a networked telecommunications channel. A current auxiliary terminal of a plurality of auxiliary terminals address reservation messages to a central terminal. The latter addresses to the current auxiliary terminal an allocation message of transmission capacity in terms of number of data packets of an information message of the current auxiliary terminal dedicated to another auxiliary terminal. The reservation messages are provided with an item of information relating to the number of data packets forming the information message of current auxiliary terminal, stored but not yet transmitted to the other auxiliary terminal, which are thus present between the last allocation message reception and the current reservation message transmission of given order, so that stability of the channel is improved.