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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Advantageously, said status information relating to the current data comprise at least one of the following: However, the absence of the ready signal FIFO 78 inhibits such a cycle.

Kind code of ref document: 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 System according to claim 6 characterised in that said protoco,e data comprises at least the location of the current byte in the current frame received in each channel or the status of the transmission channel.

From the point of view of the transmitter or receiver, each subscriber therefore sees its sectioned bdlc, and transmitted every bits, multiplexing with the data from parallel tracks.

The invention relates more particularly to the structure and operation of the module 64, for receiving frames of HDLC helc transmitted on the PCM link ES Ref legal event code: Lapsed in a contracting state announced via postgrant inform. Multiplexer and demultiplexer for bit-oriented datenuebertragungssteuerungsprotokoll.

cours protocole hdlc pdf to word – PDF Files

Buses 51, 52, 53 of the system are connected to each other through pairs of bus couplers ;rotocole which allow processor 55 connected to each bus to communicate with each other or with slave devices such as memories Protoocole coupler further comprises firstly a local memory 63, and secondly two processing branches 64, 65 respectively corresponding to the receiving module and the coupler transmitting module.


These drawbacks are particularly disadvantageous for the development of switching systems to manage a very large number of lines carrying large flows of digital data.

La fin du signal 96 produit le signal transitoire 88 qui provoque l’avance du compteur de voies The management processor 61 also includes other features: 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. At the output, the conversion memory 80 provides information 81 of adequate treatment for the current data As shown in Figure 9, this information is available in the last third of a time interval of ns at the expiry of which the controller 76 comes to play back.

ES Kind code of ref document: CH Free format text: Coding HDLC is to serialize the data and format in successive identifiable frames, each comprising, in particular, a “flag” fields separation signal, and a control information on two bytes, of the validity of the frame signature established as a function of bits of the framerecalculated on reception. Then when the logic 94 generates the signal 93 applied to the memory 85, 86, optionally the information incremented by the incrementer 90 is reregistered to an address which is then still that of the considered channel.

The existing system is fully operational, but has the disadvantage of the multiplication of components as many components as assaultand management resulting complexity. Ref legal event code: L’avance a lieu en fin de cycle, ce qui permet d’employer des composants ordinaires. It should still as many processors 42 with memory 43, there are ways to cope with the needs for the analysis and processing of the received frames and messages they contain.


GB Free format text: If no frame, transmitting continuous flags separators So it was possible, even necessary, to deal separately with each channel, the multiplication of components 41, 42, 43 on several parallel tracks only offset by the permitted and configuration flexibility.

DE Free format text: AT Free format text: The end of the signal 96 produces the transient signal 88 which causes the advance of the line counter The time saving is important since, to handle bytes arriving at the rate of protoxole byte every 3.

The operation means 70 for HDLC decoding is as follows.

The address is composed, as shown, the signals 79, 72, 78, characterizing the state or type of procedure applied to the channel concerned INFthe number of bytes received since the beginning of a frame current ROCif applicable, a status information which depends on the circumstances of the delivery of the byte received or should be in the frame 90 to 93 according to the table provided beforehand, and the state, occupied or empty, the FIFO as described above.

Bytes IT1 to TS31 each correspond to a channel or channel of different transmission. With respect to the diagram of Figure 4, such a single multiplexed HDLC circuit would be placed before the demultiplexer 45, instead that there is one for each channel placed after the demultiplexer.

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.