PROTOCOLES DE ROUTAGE: pour rôle l’échanges des informations de routes calculées par les Tâches d’une passerelle IP. Pour chaque datagramme IP qui traverse une passerelle, le protocole IP: . Niveau 2: HDLC. Niveau 3: X In this course, we discuss peer-to-peer protocols and local area networks. Part one in this course is to answer the question of how does a peer-to-peer protocol. The field of the invention is that of data transmission in the telecommunications sector, according to the ISO standards track protocol, particularly according to the .

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The means 70 dispose the data received from the PCM link, their HDLC envelope and provide relevant data in an amount of information per time interval e. Of course, a symmetric component is used in the reception part, to recover the transmitted data, by performing the following functions: He suffers no advance FIFO 88 if the channel is empty, and is incremented otherwise.

The advance takes place at the end of cycle, which allows the use of common components. Method for handling redundant switching planes in packet switches and a packet switch for carrying out the method. Lapsed in a contracting state announced via postgrant inform.

In each PCM frame, each channel sees reservations same predetermined rank byte. FR Free protodole text: The end of the signal 96 produces the transient signal 88 which causes the advance of the line counter Preferably, the analysis means and word processing rpotocole counting means the number of bytes received for each HDLC frame received on each channel, and said number of bytes of information is supplied to said transcoding means for identifying a specific processing of each byte according to the rank of this byte in the complete frame to which said byte belongs.

The time saving is important since, to handle bytes arriving at the rate of one byte every 3. This is achieved by means of a specific line for each of the channels, comprising firstly a HDLC circuit own 41, and secondly an own processor 42 associated with a buffer memory ES Kind code of ref document: Another object of the invention is to provide such a system for receiving and processing frames, together with a standard processor, reduces the execution time of repetitive frames of analysis.

The operation of the state diagram is as follows: The transcoding memory 80 works in cooperation with the following modules: Le processeur de gestion 61 hclc en outre d’autres fonctions: Date of ref document: Such data switch is for example constituted by a prootcole multiprocessor system wherein one can distinguish: System according to claim 1 characterised in that it comprises a FIFO memory 73 between said frame receiving means 70 and said word analysing and processing means AT Date of ref document: B1 Designated state s: Connection to a PCM link 10 is effected through a PCM coupler 57 cors connected in parallel to two buses 52, At the output, the conversion memory 80 provides information 81 of adequate treatment for the current data The byte TS0 contains a synchronization signal.


The invention relates to the receiving part of such a system. It is known, in this direction, to perform the functions of the circuit 41, for multiple channels multiplexed in time, using a single circuit multiplexed channels having a state memory, and the receipt of a byte from each channel in a frame, reading from the memory the state of the channel stored in the previous frame, in order to resume processing of the track, as it had been left after the receipt of a byte of that channel in the preceding frame.

If no frame, transmitting continuous flags separators MIC hdc is connected to two buses 52, 53 from the data switch by means of two isolation circuits 62, the type of buffer tristate circuits, controlled by the control processor This counter 84 undergoes a reset 87 in the presence of ITO code.

Bytes IT1 to TS31 each correspond to a channel or channel of different transmission.

cours protocole hdlc pdf to word – PDF Files

ES Free format text: In response, directly, the transcoding device provides the information written to this address identifier comprises a processing information, as indicated above, a program which should be run on the data byte System according to claim 1 characterised in that said automatic processor comprises means for triggering each new cycle of said word analysing and processing device 74 triggered after performing each of the word processing cycles.

In a preferred embodiment of the invention, said means for analyzing and word treatment include, for addressing said channel information memory, determining means of the channel number of the received current word, cooperating with means for writing said channel information in the memory and reading of said means to channel information of said transcoding means. Another object of the invention is to provide such a system allowing a variable processing time for the received data. The signal 96 is then generated by the logic 94 and it is applied to the input FIFO advance, commanding a reading operation regarding the next channel.


Are already known HDLC frame receiving systems transmitted over such channels MIC, comprising either a machine specialized from slice processors or a plurality of processors each assigned to a channel of the PCM link. A cycle of operation of the means 74 of Figure 8 begins by receiving a trigger signal LEC 95 from the controller 76, when it is ready to receive and process a received byte in one of the channels of the link MIC The processing device preferably further comprises means for triggering the next cycle of the means for analyzing and processing words, after execution of the current word processing cycle.

Elementary switch for automatic switching unit using an asynchronous multiplexing technique. GB Ref legal event code: DE Date of ref document: Device for transferring binary data between a multiplex time division and a memory. Taking into account the rank of the current byte is used to selectively address each of the received frames as a function of its length.

BE Free format text: With respect to the diagram of Figure 4, such a single multiplexed HDLC circuit would be placed before prorocole demultiplexer 45, instead that there is one for each channel placed after the demultiplexer. An advantageous embodiment of the structure of the means 74 of analysis and processing of words is shown in Figure 8.

The data is transmitted in successive blocks of bits, being repeated endlessly, the type of the block shown in Figure 3. The signal 95 causes protoco,e further read cycle in the memory 80 constituting the transcoding device.

cours protocole hdlc pdf to word

This signal opens the switches transferring the data signal 71 and the processing information 81 in the direction of the controller 76, but the information in question is not yet ready. Multiplexer and demultiplexer for bit-oriented datenuebertragungssteuerungsprotokoll.

On peut y distinguer: Ref legal event code: System according to any one of claims 1 to 9 characterised in that said processing information 81 supplied at the output of said transcoding means 82 is a logic address for branching to a processing program.