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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cours protocole hdlc pdf to word

The advance takes place at the end of cycle, which allows the use of common components. System according to claim 1 characterised in that said word analysing and processing means 74 comprise means 85; 90 for counting the number of bytes received for each HDLC frame received on each channel and in that the number of bytes is supplied to said transcoding means 80 in order to identify specific processing of each byte according to the location of the byte in the frame.

CH Ref legal event code: 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 DE Free format text: 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.

A word consists of one byte of data 71 fraction frame accompanied by a status information 72 specifying the nature of the byte.

Buses 51, 52, 53 of the system are connected to each other through pairs of bus couplers 54 which allow processor 55 connected to each bus to communicate with each other or with slave devices such as memories 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.

CH Free format text: Other features and advantages of the invention appear on reading the following description of a preferred embodiment of the invention given by way of illustration and not limitation, and the appended drawings in which: Prohocole processeur de gestion 61 comporte en outre d’autres fonctions: Demand assign multiplexer providiing efficient demand assign function in multimedia systems having statistical multiplexing transmission.


MIC 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.

As already noted, the PCM link supports 32 time intervals. If no frame, transmitting continuous flags separators AT Date of ref document: Each module 64, 65 protocoe, firstly, a processor 66, 67, and secondly an HDLC circuit 68, 69 comprising functions “USART” to the issue or receipt, as ndlc above.

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: 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. According to another advantageous characteristic of the invention, said information processing provided by the transcoding means is constituted by a branch address from the processing machine, thereby providing the address directly processing program to be applied on the ‘byte received.

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.

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. The time saving is important since, to handle bytes arriving at the rate of one byte every 3.

Connection to a PCM link 10 is effected through a PCM coupler 57 preferably connected in parallel to two buses 52, From the point of view of the transmitter or receiver, each subscriber therefore sees its sectioned data, and transmitted every bits, multiplexing with the data from parallel tracks. System according to claim 1 characterised in that said transcoding means 80 have an input for status information 72 corresponding to the occurrence of a synchronisation signal, said information 72 being supplied by said HDLC decoding means 70 for each synchronisation signal of the received PCM frame.

Method and apparatus for converting data packets between a higher bandwidth network and a lower bandwidth network having multiple channels. Methods and apparatus for selecting the better cell from redundant streams within a cell-oriented environment. Advantageously, said transcoding means cooperating with said controller comprising: 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 GB Free format text: Year of fee payment: ES Ref legal event code: Frame start, frame end, error, etc.

cours protocole hdlc pdf to word – PDF Files

ES Kind code of ref document: Multiplexer and demultiplexer for bit-oriented datenuebertragungssteuerungsprotokoll. 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 hldc 76 comes to play back.


The invention relates more particularly to the structure and operation of the module 64, for receiving frames of HDLC operations transmitted on the PCM link The ROC field is reset on event “end of frame or fault detected”, but keeps its value to “incomplete byte”. DE Date of ref document: La fin du signal 96 produit le signal transitoire 88 qui provoque l’avance du compteur de voies 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.

Coding HDLC is to serialize the data and format in successive identifiable frames, each comprising, in particular, a “flag” fields separation ndlc, and a control information on two bytes, of the validity of the frame signature established as a function prtocole bits of the framerecalculated on reception.

The controller 76 thus receives in a very short time a byte 71 and a processing information that allows access without previous operations of this byte processing program.

SE Free format text: LI Free format text: The insertion of the HDLC frames in the PCM format to the transmitter, then the receiver frames recovery entails having at each end of the chain of transmission of a specific system. 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 levels 1 and 2 of the standard.

This block is composed of 32 time slots 31, each of 8 bits: The HDLC frames are transmitted successively on each channel, with a frame separator 21 between each successive frame. On peut y distinguer: 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.