Abstract: A method of resource reservation with service guarantee in terms of throughput and deadline at the level of the N nodes of a radio network using time slots to send and transmit data is disclosed, which implements a global reservation process in which a reservation message sent uses at least one of the following two parameters: the maximum deadline required to access the radio medium, the minimum throughput required in order to satisfy the service guarantee. A dynamic time slot allocation scheme is used that is defined in the following manner: the N nodes each include K slots, including a control slot, P elastic slots and (K-1-P) session slots, and the (K-1-P) session slots are amalgamated for the allocation of resources required by a node at a given instant.

Abstract: Method of resource reservation with service guarantee in terms of throughput and deadline at the level of the N nodes of a radio network using time slots to send and transmit data, characterized in that it implements a global reservation process in which, a reservation message sent uses at least one of the following two parameters: the maximum deadline required to access the radio medium, the minimum throughput required in order to satisfy the service guarantee. According to an embodiment, the method implements a dynamic time slot allocation scheme defined in the following manner: the N nodes each comprising K slots, including a control slot, P elastic slots and (K-1-P) session slots, the (K-1-P) session slots are amalgamated for the allocation of resources required by a node at a given instant.

Abstract: In a method for the conveying of data between several users A, B, in a communications network comprising at least one low-bit-rate artery and one or more standard-bit-rate arteries, the network comprises a basic transmission unit, such as a cell, and at least one adaptation layer protocol, the data to be transmitted taking the form of packets Pi having a size smaller then the size of the basic transmission unit, the method comprising at least the following steps: extracting the packets Pi from the upstream and/or downstream cells of a low-bit-rate artery (steps (4a) or (5a)), inserting said packets according to a given adaptation layer protocol, in the cells of a virtual circuit set up between the ends of the low-bit-rate artery (steps (4b)), or between the users (steps (5b) and (5c)).

Abstract: Disclosed is a carrier network fulfilling a distributed virtual routing function, said carrier network comprising one or more components, each of the components comprising at least two nodes communicating with one another by means of an artery, a node comprising a an access function. At least one component of said network comprises the following elements: several bridge ELANs, each bridge ELAN being connected to a virtual network VLAN, at least one transit ELAN, all access functions of the same component being adjacent through said transit ELAN, and at the level of an access function: router LEC means adapted to connect the access function to at least one bridge ELAN associated with a VLAN means for the identification of the VLANs serviced by the access function, means (transit LEC) to connect the transit ELAN to the access function.

Abstract: Disclosed is a virtual router distributed on a carrier network, said carrier network comprising one or more components, each of the components comprising at least two nodes communicating with one another by means of an artery, a node comprising a FAx access function and server functions (LES/BUS, LECS, MPS). At least one component of said network comprises the following elements: several ELANi-bridges, each ELANi-bridge being connected to a virtual network VLANi, at least one transit ELAN, Tx, at the level of an access function Fax, LEC router means Rix adapted to connecting the access function FAx to at least one ELANi associated with a VLANi, means (Lx) for the identification of the VLANi serviced by the access function FAx, means (LEC transit) to connect-the transit ELAN to the access function. Use of a distributed virtual router ATM type carrier networks and IP data packets.

Abstract: A method for the control of flows particularly within an ATM switch transmission network with a distributed architecture. The method distributes a specified number n of shapers to each input line card, a specific shaper being dedicated to the VBRnrt (Variable Bit Rate non real time) category flows as a function of the totalized mean bit rate, and n−1 other shapers being adjusted as a function of the available bit rate (AVCR) of the output ports.

Abstract: The invention relates to a process for translating an ATM cell header for the routing thereof on a transmission highway of a communication network via an ATM switch. The header of the cell includes a first field VPI and a second field VCI, the first field VPI identifying a virtual path number and the second field VCI selecting a specified virtual channel within the virtual path. The process includes in] storing indirect addressing context page numbers in a first major table (3), storing context page numbers for the circuits in VP switching mode in a second major table (4), storing context page numbers (7) for the circuits in VC switching mode in indirect addressing (5) context pages (2), addressing the context pages (7) of circuits in VC switching mode by way of an indirect addressing (5) context page on the basis of the first major table (3) and of the field VCI, and addressing the context pages (9) of the VP switching mode on the basis of context page numbers contained in the second major table (4).

Abstract: A device for ATM cell switching having failure tolerance. The device is divided into two types of equipment modules. The first type includes connecting modules while the second type includes two branching and managing modules, one operating in an active mode while the other operates in a passive mode. An accessing device is implanted in each connector. Devices to execute the ATM layer function are almost identically implanted in each connector and in each of the two branching and managing modules. A supervision bus connects both types of modules to ensure quick and automatic reconfiguration of the device in case of failure in one of its components. The supervising bus is of simple configuration and only serves to carry, under the control of the managing module, signals indicative of the master and slave managing means as well as a signal indicative of the active branching module.

Abstract: A process for detecting upstream congestion within an ATM switch. The switch includes several junctions linked together by a cross-connector. In each input junction, the number of incoming cells bound for a same specified output port of a junction are counted. Results of the count supplied by the input junctions are transferred to the output port. Results of the counts in the output junction are aggregated and a congestion is declared in the output port if the aggregate number of cells is greater than a specified threshold value.

Abstract: The method consists in distributing a specified number n of shapers (91 . . . 9n) to each input line card (7i), a shaper being dedicated to the VBRnrt (Variable Bit Rate non real time) category flows as a function of the totalized mean bit rate and the n−1 other shapers being adjusted as a function of the available bit rate (AVCR) of the output ports. Application to ATM transmission networks.

Abstract: In a method for the conveying of data between several users A, B, in a communications network comprising at least one low-bit-rate artery and one or more standard-bit-rate arteries, the network comprises a basic transmission unit, such as a cell, and at least one adaptation layer protocol, the data to be transmitted taking the form of packets Pi having a size smaller then the size of the basic transmission unit, the method comprising at least the following steps:

Abstract: Disclosed is a virtual router distributed on a carrier network, said carrier network comprising one or more components, each of the components comprising at least two nodes communicating with one another by means of an artery, a node comprising a FAx access function and server functions (LES/BUS, LECS, MPS).

Abstract: A process and device for measuring the proportion of ATM cells satisfying a criterion. The process includes allocating a first numerical value to the cells passing through a specified point of an ATM network for satisfying criterion and allocating a second numerical value to the cells which do not satisfy the criterion. An exponential mean is then performed of the string of values thus allocated to each cell.

Abstract: The process applies to the approximate calculation of the exponential mean of a string of numbers u.sub.n coded in a floating-point format used to convey certain bit rate information in ATM networks, each number being defined with the aid of an exponent e.sub.n and a mantissa m.sub.n by a relation of the form u.sub.n =2.sup.e n.(1+m.sub.n /512). It consists in approximating the exponential mean by the code value associated with the exponential mean of the code words U.sub.n =512.e.sub.n +m.sub.n.

Abstract: The invention relates to a process for translating an ATM cell header for the routing thereof on a transmission highway of a communication network via an ATM switch. The header of the cell includes a first field VPI and a second field VCI, the first field VPI identifying a virtual path number and the second field VCI selecting a specified virtual channel within the virtual path. The process includes in]storing indirect addressing context page numbers in a first major table (3), storing context page numbers for the circuits in VP switching mode in a second major table (4), storing context page numbers (7) for the circuits in VC switching mode in indirect addressing (5) context pages (2), addressing the context pages (7) of circuits in VC switching mode by way of an indirect addressing (5) context page on the basis of the first major table (3) and of the field VCI, and addressing the context pages (9) of the VP switching mode on the basis of context page numbers contained in the second major table (4).

Abstract: A method for the control of flows particularly within an ATM switch transmission network with a distributed architecture. The method distributes a specified number n of shapers to each input line card, a specific shaper being dedicated to the VBRnrt (Variable Bit Rate non real time) category flows as a function of the totalized mean bit rate, and n?1 other shapers being adjusted as a function of the available bit rate (AVCR) of the output ports.