Abstract:
A communication system for communicating on a network that includes communication devices performs communications in a connected mode or a non-connected mode. For at least one of the communication devices, to effect a transmission in the connected mode, the system performs an information operation during which an item of information representing a passband necessary for the transmission in the connected mode is broadcast on the network. The system performs a passband allocation operation to allocate the passband for connected-mode transmissions, based on the item of information. A second allocation operation is performed to allocate, for non-connected-mode transmissions, all or part of the passband not allocated for the connected-mode transmissions. The system adjusts the allocated passband to avoid congestion on the network.
Abstract:
The invention concerns a concrete obtained by mixing with water, cement, granular elements, elements with puzzolanic reaction, constituents capable of improving the toughness of the matrix, metal fibers and at least a dispersing agent, in specified conditions and proportions. Said concrete has improved properties compared to prior art concrete comprising metal fibers.
Abstract:
Inorganic liquid filler compositions, well suited for the sealing or consolidation of ground formations or construction/building materials by injecting such composition into the fissures, cavities or interstices thereof (void volume) and permitting the composition to harden, comprise a homogeneous solution of (i) an alkali metal silicate, (ii) an alkali metal polyphosphate and (iii) an alkali metal aluminate.
Abstract:
Inorganic settable slurries well suited for the sealing and/or consolidation of unstable soil/ground formations, or for the sealing/repair of defective building materials, include (a) an aqueous solution of an alkali metal silicate, (b) a water-soluble calcium compound, e.g., lime, (c) an alkali metal aluminate, and (d) an alkali metal hydroxide, preferably sodium hydroxide.
Abstract:
A method for sending compressed data representing at least part of a digital image includes the following steps: encoding (220) source data representing said part to obtain first compressed data having a given size; based at least on said size, including (210) said first compressed data either in a first slice comprising second compressed data representing other parts of the digital image or in an empty second slice; sending the slice comprising said first compressed data. A corresponding device is also described.
Abstract:
A transmit mode performs indirect synchronization with a master node for accessing a medium, in a synchronous communications network comprising a plurality of slave nodes capable of accessing the medium during access time slots. The indirect synchronization includes receiving at least one frame coming from at least one of the slave nodes of the network. From each frame received, synchronization information pertaining to a level of synchronization of the slave node having sent the frame is obtained, the level of synchronization of the slave node being relative to the master node. A reference node is selected from among the at least one of the slave nodes from which at least one frame has been received, as a function of the pieces of synchronization information, the transmit node being indirectly synchronized with the master node via the reference node.
Abstract:
A method of transmitting data in a synchronous communications network, which includes multiple nodes, includes communicating a super frame that includes multiple frames, based on a network cycle, each frame being associated with one of the nodes. Each frame includes a payload that includes an own data section and a repeat data section. The nodes include at least one relay node associated with an application generating own data of the relay node to be transmitted to at least one second node. The relay node receives frames from other of the nodes, reads a predetermined part of data from the received frames, which enables repeat data to be obtained, writes the repeat data in the repeat data section of a new frame, writes the own data of the relay node in the own data section of the new frame, and transmits the new frame.
Abstract:
The invention relates to a method for allocating at least one identifier known as routing identifier to at least one bridge (1002, 1008, 1009, 1010, 1012) of a network (1000), the said bridge comprising at least two interconnection equipment (1021, 1035) a first (1021) of which is connected to at least one first part (1014) of the said network, characterized in that each one of the interconnection equipment of the said bridge being in a “state” determined by reference to the allocation of an identifier to this interconnection equipment, the said method includes the following steps:determination (1041, 1042; 1051, 1052, 1053; 1056, 1057) of at least one “state” which corresponds to the “state” of the said at least one second interconnection equipment of the said bridge,deciding (1044; 1054; 1059) as to the allocation of an identifier to the at least one first interconnection equipment of the said bridge as a function of the said at least one determined “state”.
Abstract:
A method is proposed for managing access to a communications network clocked in transmission cycles by a master node characterized in that, during a given transmission cycle, a slave node of the network performs steps for: obtaining (705) an active access sequence applicable for the given transmission cycle and a piece of information on duration of relevance associated with the active access sequence obtained; carrying out (740) a first check that at least one packet is received by the slave node during the given transmission cycle, according to the active access sequence; in the event of a positive first check, determining (745, 725, 730, 740) an access sequence for a following transmission cycle as a function of pieces of information contained in the received packet or packets; in the event of a negative first check, determining (725, 727, 710, 715, 720, 750, 755) an access sequence for the following transmission cycle as a function of the piece of information on duration of relevance associated with the active access sequence obtained.
Abstract:
Disclosed is a method for the broadcasting of a data packet, called a broadcast packet, within a switched network comprising a plurality of nodes connected to one another by a plurality of links, said broadcast packet being broadcast along a spanning tree of the network. Each node is of the type used to send said broadcast packets simultaneously on several links. The method comprises a step for the calculation of said spanning tree that consists in minimizing the number of links per node included in said spanning tree.