摘要:
A method of transmission of at least one data content by a source node associated with a generator application to at least one destination node, each associated with a consumer application, in a communications network comprising a plurality of nodes, each being associated with an application, the network implementing a first clocking which defines a first cycle, called a network cycle, for data transmission on said network.Each node of the network implements a second clocking which defines a second cycle, called a local cycle, for data transmission between the node of the network and its associated application, the network cycle being equal to an integer multiple P, P≧1, of the local cycle, the start of the network cycle coinciding with the start of a local cycle, the local cycle comprising a plurality of virtual channels corresponding to time slots, a set of the virtual channels being assigned to the transmission of the content or contents.
摘要:
A method of transmission of at least one data content by a source node associated with a generator application to at least one destination node, each associated with a consumer application, in a communications network comprising a plurality of nodes, each being associated with an application, the network implementing a first clocking which defines a first cycle, called a network cycle, for data transmission on said network.Each node of the network implements a second clocking which defines a second cycle, called a local cycle, for data transmission between the node of the network and its associated application, the network cycle being equal to an integer multiple P, P≧1, of the local cycle, the start of the network cycle coinciding with the start of a local cycle, the local cycle comprising a plurality of virtual channels corresponding to time slots, a set of the virtual channels being assigned to the transmission of the content or contents.
摘要:
The invention concerns a method for accessing a medium by a transmit node in a synchronous communications network comprising a plurality of nodes capable of accessing said medium during access time slots of predetermined duration to transmit data frames via said network. The plurality of nodes comprises a master node that implements a clocking that defines a network cycle for accessing said medium and comprises at least two slave nodes being slaves of said clocking including said transmit node. Each network cycle comprises a plurality of frames transmitted during said access time slots according to a predetermined transmission sequence.According to the invention, the transmit mode performs the following steps: receiving at least one frame coming from at least one of the other nodes of the network; from each frame received, obtaining synchronization information pertaining to a level of synchronization of the node having sent said frame, said level of synchronization being relative to the master node; selecting a reference node from the node(s) from which at least one frame has been received, as a function of said pieces of synchronization information; determining a start of access time slot from the positions in said transmission sequence of the frames associated with the reference node and with said slave node; and accessing said medium at said determined start of access time slot.
摘要:
A method for the transmission of data in a synchronous communications network comprising a plurality of nodes, a super frame being communicated based on a network cycle on the network and comprising a plurality of frames, each frame being associated with one of the nodes. Each frame comprises a payload part itself comprising an own data section and a repeat data section. The plurality of nodes comprises at least one relay node associated with an application generating own data of the relay node having to be transmitted to at least one second node. The relay node performs the following steps: reception of frames coming from the other nodes; reading of a predetermined part of the data from the received frames, enabling repeat data to be obtained; writing said repeat data in the repeat data section of a new frame; writing own data of said relay node in the own data section of the new frame; and transmission of the new frame.
摘要:
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.
摘要:
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.
摘要:
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, characterised 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”.
摘要:
A multimedia interface device for the transfer of information in a communications network comprises: at least two connection means to which, respectively, at least two sending devices can get connected by means respectively of two communications links compliant respectively with two protocols; means of connection to a single remote switching device by means of a single cable, the switching device comprising at least switching means between at least two ports; means to mix the information sent out by sending devices into only one stream of information in the form of segments being able to contain part of the information; and means to transfer the stream of information in the form of segments on at least one pair of cable to the switching device to which it is connected according to a third protocol.
摘要:
A coding method for a sequence of elements that can be equal to at least two distinct values, the elements forming at least one input symbol. The coding method comprises a stretching step of stretching at least one of the input symbols, to form a stretched symbol, such that the stretched symbol does not have any successive transitions. The coding method further comprises a cancelling step of canceling the disparity of the stretched symbol to form a coded symbol, such that the coded symbol comprises approximately the same number of elements of each value.
摘要:
This invention relates to a coding method for a sequence of elements that can be equal to at least two distinct values, the said elements forming at least one input symbol. According to the invention, this type of coding method comprises: a stretching step to stretch at least one of the said input symbols, to form a stretched symbol, such that the said stretched symbol does not have any successive transitions; a cancelling step to cancel the disparity of the said stretched symbol to form a coded symbol, such that the said coded symbol comprises approximately the same number of elements of each value.