Abstract: A method and system for determining a path between a cluster which has a plurality of mobile stations and a main station and/or a zone network. The cluster is linked with the main station and/or the zone network by a long-range link. The method includes transmitting pieces of information between the cluster and the main station and/or the zone network via the long-range link, determining a first piece of information properly received by one of the mobile stations, designating the mobile station that receives the first piece of information properly received as an associated mobile station, and associating with the associated mobile station a preferred path to be taken by all or a majority of pieces of information to be transmitted between the cluster and the main station and/or the zone network.

Abstract: Method and system for exchanging information between at least one cluster comprising several mobile stations and at least one main station, or one zone network, the cluster or clusters being linked with the main station or the zone network by means of a long-range link. The method consists in transmitting information by means of a routing channel determined on the basis of an existing “internal connectivity” (LAN) between the different mobile stations and means adapted to the determining, at the reception level by each mobile station of a cluster and among a given type of pieces of information, of the first piece of information properly received by a mobile station; the “designating” of the associated mobile station; and the associating, with this mobile station, of the preferred reverse path to be taken by all or the majority of the pieces of information to be transmitted from the cluster to the main station.

Abstract: The method enables the control of congestion in sporadic exchanges of packets of data in a digital transmission network. Each packet is formed by a header enabling it to be identified and to be guided through virtual channels and by a part containing information elements to be conveyed. The method includes detecting, at each node of the network, channels that are congested, and, on nodes upline with respect to each congested virtual channel detected, transmitting a congestion indicator to stop connections on the congested virtual channels so long as the congestion observed by a node on the congested virtual channels has not been cleared.

Abstract: An optical interconnection circuit includes a fixed number (N) of interconnected circuits (C1 to C16). Each circuit has an optical emitter (E1 to E16) and at least one optical receiver (R1, R16). The emitter outputs an optical wavelength which is specific to the circuit on which it is located. An optical coupler (CE) connects the emitter in each circuit to all receivers in the other circuits and each circuit (C1 to C16) has an address for identifying that particular circuit. The value of this address is applied to the emitter to adjust the optical wave length at which the emitter operates.

Abstract: An inter-terminal telecommunications network for the transmission of data by packets includes a transport layer formed by switching micronodes connected to one another by lines. The transport layer is adapted to enable the communication and conveyance of packets or cells of data elements, on the one hand among units of equipment of the network and, on the other hand, between the network and other units of equipment external to the network. Each micronode is controlled by means of instructions contained in each cell header that is presented to it on a line of the network to enable the routing of the cell on another line of the network and the transmission of the number and of the states of the neighboring micronodes towards a unit of a centralized management layer so as to keep the management layer constantly informed about the configuration of the network.

Abstract: The packet switch for asynchronous mode transfer in a transmission network is organized around a multiplexed bus which absorbs all the throughput. For this, the incoming trunk lines are connected to an 8-bit series/parallel adapter made with fast technology elements, followed by memory stacks associated with the incoming trunk lines, from which the pieces of data are removed at moderate speed in wider packets. A multiplexer transmits these pieces of data to the central bus. At this level, a centralized translation of the headers is done. Then the pieces of data are transmitted to the outgoing channels through a reversed structure, with output memory stacks restoring 8-bit words at moderate speed, and then an adapting circuit transmitting the series data at high speed to the outgoing arteries.

Abstract: In asynchronous mode transmission for multiple-service networks with a wide range of throughput rates, it is stipulated that the digital data will be conveyed in standard cells having a header and a data field, with fixed lengths. For the low throughput rate services, which are penalized by this type of transmission as regards their transmission efficiency, the method disclosed provides for the transmission, while performing all the switching operations on the standardized cells, of microcells on those trunk lines where this type of transmission occupies a major place. These microcells result from the cutting up of the standardized cells, preventing the transmission of unnecessary data field lengths.

Abstract: The network of the invention comprises, in the transmitter, a "marker" generator which inserts bits of a cyclical sequence into the binary data flow and, in the receiver, a marker processing circuit by which it is possible to identify the start of the marker cycle in order to re-justify the useful data signal in accordance with the detection of this start of a cycle.

Abstract: In a radiotelephone system comprising a ground central station and a plurality of peripheral stations having access to a geostationary satellite, demand-assignment multiple-access (DAMA) conversations are established by single-span transmission between subscribers of the peripheral stations. In order to prevent conflicts arising from two simultaneous call demands, a rectangular-wave synchronization signal is transmitted by the central station to the peripheral stations in a specialized channel and the demands are caused to coincide with the active wavefronts of the synchronization signal.