Abstract: A hybrid architecture for avionics data transmission and a corresponding system are disclosed. In one aspect, the architecture includes a plurality of subscriber stations connected by a data transmission capability. The stations are connected on the one hand by a first capability for transmitting data to their neighbors to form at least a first data transmission network in a closed ring between the stations and on the other hand by a second capability for transmitting data to a capability forming a central communication plan switch to form at least one second data transmission network in a star between the stations and the capability forming the central plan switch.

Abstract: This digital data exchange architecture includes at least one communication network having at least one communication plane, a plurality of pieces of subscriber electronic equipment, and several switches. Each switch includes means forming a time referencing server able to: generate a local current time reference; transmit this local current time reference generated on the corresponding communication plane via a frame; receive via one or several frames the current time references generated by at least some of the switches of the corresponding communication plane; analyze the received current time references, in order to generate a local following time reference according to a predetermined generation law; and associate the local following time reference with the local current time reference.

Abstract: The present invention relates to a method that may be used in a digital data communication system comprising a communication network constituted of a plurality of nodes, and a plurality of subscriber equipment units each connected to a node, includes: a transmission phase (P1) including the steps of limiting of the size of each frame to be transmitted, adding identification-authentication credentials, and transmitting the frames with a predetermined transmission interval; and a transmission phase (P2) including the steps of monitoring-checking for compliance with the input conditions; removal of each frame that is non-compliant, replicating each frame that is compliant, monitoring-checking for compliance with the output conditions, removing each frame that is non-compliant, transmitting each frame that is compliant, and recording and storing of the identification-authentication credential for each frame transmitted.

Abstract: A data security system for securing the critical data of an on-board airplane avionics system comprising access control means for controlling access to the said data on the basis of the security related information of a user, wherein the security related information is selected from the group consisting of: a list of authorised users; a maximum number of allowed accesses, as well as the types of allowed accesses; a time window allowed for access; a series/concatenation allowed for access, by various different users; and a hierarchical prioritisation of the zones associated with the data storage means.

Abstract: This multi-user processor system for processing information, of the type including a data exchange engine (3) associated with multiple users (1) of shared resources (2), is characterized in that it includes means (4) for controlling data exchange in the processor, associated with each user, the exchange engine and the shared resources, in order to authorize transactions or not and in that the engine includes means (5) for breaking down authorized transactions into elementary sub-transactions, means (6) for interlacing the sub-transactions obtained from the breaking down of the authorized transactions of several users and the means (6) for distributing these interlaced sub-transactions among the different resources.

Abstract: A transmission system for avionics application data is disclosed. In one aspect, the system is for transmitting avionics application data between data producing means and data consuming means, the application data being transmitted in the form of data transmission units, each including: at least one portion of an application message, and an additional message containing identification and control information. The additional message includes: an identification sequence including a static part making it possible to identify the application message and its source and a variable part making it possible to distinguish the message in a unique manner, and a control sequence designed to check the integrity of the application message and based on a sequence representing a cyclic redundancy control code of the concatenation of at least one portion of the application message corresponding to said unit, with the identification sequence.

Abstract: This system for transmitting avionic information of the type including means for transmitting data frames through at least one transmission network based on avionic switches, intended for corresponding receiving means. The system further includes means for determining the crossing time by at least some of the data frames of at least some of the switches and means on the network for transmitting a corresponding crossing time information frame associated with this data frame, intended for corresponding receiving means.

Abstract: A critical data transmission architecture in avionics systems is disclosed. The system includes a module of production, a module of consumption, and at least one physical pathway linking the module of production to the module of consumption. The module of production is configured to transmit each critical datum by at least two data, one of a first independent type and one of a second independent type that cannot interfere with one another. Each datum of the first type or the second type is transmitted in the form of a data transmission unit including a portion of an application message and a message. The additional message of each transmission unit includes a verification sequence and each datum of the first type and the second type is transmitted by the same physical pathway and is generated by different module of generation.

Abstract: This switched data transmission system, particularly for use in avionics applications, of the type comprising a plurality of electronic devices and equipment units adapted for transmitting discrete messages over a transmission network, and in which each of the devices and equipment units is connected to a network switch, the switches being connected to each other by means of data transmission links so as to form a physical topology of a loop network, each message being associated with information regarding data flow priority in the network comprising of functional priority information, is characterized in that each message is also associated with information regarding temporal priority of data flow in the network.

Abstract: This switched data transmission system, that may be used in particular in avionics applications, of the type comprising a plurality of electronic devices and equipment units adapted for transmitting discrete messages over a transmission network, and in which each of the equipment units is connected to a network switch, the switches being connected to each other by means of data transmission links so as to form a physical topology of a loop network, each message being associated with information regarding data flow priority in the network comprising of functional priority information, is characterized in that each message is also associated with information regarding topological priority of data flow in the network.

Abstract: A transmission system for avionics application data is disclosed. In one aspect, the system is for transmitting avionics application data between data producing means and data consuming means, the application data being transmitted in the form of data transmission units, each including: at least one portion of an application message, and an additional message containing identification and control information. The additional message includes: an identification sequence including a static part making it possible to identify the application message and its source and a variable part making it possible to distinguish the message in a unique manner, and a control sequence designed to check the integrity of the application message and based on a sequence representing a cyclic redundancy control code of the concatenation of at least one portion of the application message corresponding to said unit, with the identification sequence.

Abstract: A data security system for securing the critical data of an on-board airplane avionics system comprising access control means for controlling access to the said data on the basis of the security related information of a user, wherein the security related information is selected from the group consisting of: a list of authorised users; a maximum number of allowed accesses, as well as the types of allowed accesses; a time window allowed for access; a series/concatenation allowed for access, by various different users; and a hierarchical prioritisation of the zones associated with the data storage means.

Abstract: A hybrid architecture for avionics data transmission and a corresponding system are disclosed. In one aspect, the architecture includes a plurality of subscriber stations connected by a data transmission capability. The stations are connected on the one hand by a first capability for transmitting data to their neighbors to form at least a first data transmission network in a closed ring between the stations and on the other hand by a second capability for transmitting data to a capability forming a central communication plan switch to form at least one second data transmission network in a star between the stations and the capability forming the central plan switch.

Abstract: This system for transmitting avionic information of the type including means for transmitting data frames through at least one transmission network based on avionic switches, intended for corresponding receiving means. The system further includes means for determining the crossing time by at least some of the data frames of at least some of the switches and means on the network for transmitting a corresponding crossing time information frame associated with this data frame, intended for corresponding receiving means.

Abstract: The present invention relates to a method that may be used in a digital data communication system comprising a communication network constituted of a plurality of nodes, and a plurality of subscriber equipment units each connected to a node, includes: a transmission phase (P1) including the steps of limiting of the size of each frame to be transmitted, adding identification-authentication credentials, and transmitting the frames with a predetermined transmission interval; and a transmission phase (P2) including the steps of monitoring-checking for compliance with the input conditions; removal of each frame that is non-compliant, replicating each frame that is compliant, monitoring-checking for compliance with the output conditions, removing each frame that is non-compliant, transmitting each frame that is compliant, and recording and storing of the identification-authentication credential for each frame transmitted.

Abstract: This digital data exchange architecture includes at least one communication network having at least one communication plane, a plurality of pieces of subscriber electronic equipment, and several switches. Each switch includes means forming a time referencing server able to: generate a local current time reference; transmit this local current time reference generated on the corresponding communication plane via a frame; receive via one or several frames the current time references generated by at least some of the switches of the corresponding communication plane; analyze the received current time references, in order to generate a local following time reference according to a predetermined generation law; and associate the local following time reference with the local current time reference.

Abstract: This multi-user processor system for processing information, of the type including a data exchange engine (3) associated with multiple users (1) of shared resources (2), is characterized in that it includes means (4) for controlling data exchange in the processor, associated with each user, the exchange engine and the shared resources, in order to authorize transactions or not and in that the engine includes means (5) for breaking down authorized transactions into elementary sub-transactions, means (6) for interlacing the sub-transactions obtained from the breaking down of the authorized transactions of several users and the means (6) for distributing these interlaced sub-transactions among the different resources.

Abstract: A critical data transmission architecture in avionics systems is disclosed. The system includes a module of production, a module of consumption, and at least one physical pathway linking the module of production to the module of consumption. The module of production is configured to transmit each critical datum by at least two data, one of a first independent type and one of a second independent type that cannot interfere with one another. Each datum of the first type or the second type is transmitted in the form of a data transmission unit including a portion of an application message and a message. The additional message of each transmission unit includes a verification sequence and each datum of the first type and the second type is transmitted by the same physical pathway and is generated by different module of generation.

Abstract: This switched data transmission system, particularly for use in avionics applications, of the type comprising a plurality of electronic devices and equipment units adapted for transmitting discrete messages over a transmission network, and in which each of the devices and equipment units is connected to a network switch, the switches being connected to each other by means of data transmission links so as to form a physical topology of a loop network, each message being associated with information regarding data flow priority in the network comprising of functional priority information, is characterized in that each message is also associated with information regarding temporal priority of data flow in the network.

Abstract: This switched data transmission system, that may be used in particular in avionics applications, of the type comprising a plurality of electronic devices and equipment units adapted for transmitting discrete messages over a transmission network, and in which each of the equipment units is connected to a network switch, the switches being connected to each other by means of data transmission links so as to form a physical topology of a loop network, each message being associated with information regarding data flow priority in the network comprising of functional priority information, is characterized in that each message is also associated with information regarding topological priority of data flow in the network.