摘要:
The present invention relates to a method of synchronisation between communication networks exchanging information by frame of informations, each communication network having clock and the number of clock pulses is monitored by a counter. The synchronisation is made by reading information representing the counted clock pulses of the clock of the first network at the appearance of a reference event, inserting at least said information or calculated information on the basis of said information into the frame of information as the synchronisation information, transferring said frame of information from the first to the second network, reading information representing the number of counted clock pulse of the clock of the second network at the appearance of reference event, reading synchronisation information inserted in received frame of information from the first network, calculating a difference between information and synchronising the second network.
摘要:
The present invention concerns a method and an apparatus of generating a reference event in a receiving node receiving frames of information, when a frame of information is received, the method and the apparatus sample the frame of information in order to form sampled data, process sampled data in order to detect among said sampled data a specific data, monitor the number of processed sampled data until the detection of a specific data and generate a reference event according to the result of processing and monitoring.
摘要:
The present invention relates to a method of synchronization between communication networks exchanging information by frame of informations, each communication network having clock and the number of clock pulses is monitored by a counter the synchronization is made by reading information representing the counted clock pulses of the clock of the first network at the appearance of a reference event, inserting at least said information or calculated information on the basis of said information into the frame of information as the synchronization information, transferring said frame of information from the first to the second network, reading information representing the number of counted clock pulse of the clock of the second network at the appearance of reference event, reading synchronization information inserted in received frame of information from the first network, calculating a difference between information and synchronizing the second network.
摘要:
The present invention relates to a method of synchronization between communication networks exchanging information by frame of informations, each communication network having clock and the number of clock pulses is monitored by a counter the synchronization is made by reading information representing the counted clock pulses of the clock of the first network at the appearance of a reference event, inserting at least said information or calculated information on the basis of said information into the frame of information as the synchronization information, transferring said frame of information from the first to the second network, reading information representing the number of counted clock pulse of the clock of the second network at the appearance of reference event, reading synchronization information inserted in received frame of information from the first network, calculating a difference between information and synchronizing the second network.
摘要:
A method of transmitting binary data by a sender to a receiver over a transmission channel includes a formatting function integrated with a function of external coding of the binary data. The method applies in particular to the case where the sender uses a turbocoder with an interleaver of the “x to xe” type, and where the receiver uses a turbodecoder with an interleaver of the “x to xe” type.
摘要:
An information packet transmission device for a communication system has a transmission part and a reception part, at least one of the transmission or reception parts having a turbocoder, and an external interleaver upstream of the turbocoder. The turbocoder preferentially has an interleaver, and a deinterleaver of the “x to xe” type. The external interleavers are of the row column or column row type.
摘要:
In order to adjust the maximum size of the information sequences transmitted by a plurality of terminals in a network, according to a predetermined network protocol, between two subnetworks supporting different maximum sizes of information sequence: there is stored in an information base, for each of the terminals, an identifier for this terminal and the maximum size of the information sequences allowed by the network protocol for communicating with this terminal; the information base is updated from the analysis of any information sequence conveyed in one of the subnetworks; then, for each information sequence to be transmitted: the identifier of the destination terminal and the corresponding maximum size of the information sequences are read in the information base; the maximum size read is compared with the current maximum size allowed by the network protocol; and, if the maximum size read is less than the current maximum size, the current maximum size is adjusted by allocating to it the value of the maximum size read.
摘要:
A method of accessing a communication medium used by a plurality of communication terminals, comprising the following steps, performed by a first communication terminal belonging to a group of communication terminals from the plurality of communication terminals: detecting 410 an upcoming reservation, by a second communication terminal of the group, of an occupancy time interval of the communication medium, determining 420 a timeslot in the occupancy time interval, and transmitting 460 data over the communication medium during the determined timeslot. The method provides improvements in the communications of communication terminals sharing a communication medium.
摘要:
The disclosure provides an acknowledgement of data received by a communication device, the data being received by data packets, with each data packet comprising a plurality of data blocks. The communication device determines, for a data packet, a number of data blocks whose data can be processed correctly. The communication device further sends an acknowledgement for at least one data block in the data packet if the number of data blocks whose data can be processed correctly is between a first and a second threshold. The communication device also sends, for the data packet, a piece of information at packet level representing the number of data blocks whose data can be processed correctly if the number of data blocks whose data can be processed correctly is lower than the first threshold or higher than the second threshold.
摘要:
The invention is directed to the optimization of an access to a medium in wireless networks which can be accessed by a plurality of nodes, each node of the plurality of nodes using a medium access mechanism of the Carrier Sense Multiple Access with Collision Avoidance type based on a computation of a backoff value. A specific value is associated with each node of a set of nodes of the plurality of nodes, the specific value of a node being known by the other nodes of the set of nodes. According to the invention, a backoff value is determined for each node of the set of nodes, in each node of the set of nodes, the backoff value associated with a node being determined as a function of the specific value associated with that node.