RU1795497C - Device for transmitting discrete information in ring communication channel - Google Patents

Abstract

The invention relates to devices used in data transmission systems, in particular to devices for receiving, transmitting data over a common communication channel of a local area network LAN. The invention improves the information content of the device. The device contains receivers 1, 19, 20, 21, a transmitter 3, switches 5.18, triggers 4, 6,10, 25, elements 7, 9, 13, 26, 27, 28, 29, elements OR 30-40, OR element 41, registers 8, 22, 23, comparison unit 24, chroniser 11, information input 12. devices, first communication channel 2, counter 14, decoder 15, delay elements 16, 17. 1 il .. 7 ft ate with

Description

The invention relates to computer technology, to devices used in data transmission systems, in particular to devices for receiving, transmitting data over a common communication channel (mono channel) of a local area network LAN, as well as protection against conflicts in the mono channel due to superposition of signals to a friend.

The main quality criterion for any data transmission system is throughput. It is determined by the number of packets or frames of information transmitted over the mono channel per unit time. The throughput is significantly affected by the speed of the hardware and software that monitors the mono channel and blocks the transmitters in case of detection of someone else's information transmission.

The detection of foreign transmission in the LAN mono channel is carried out by special mono channel status monitoring circuits. In an analogue, which in terms of technical nature and the achieved result can be attributed to the basic object of the present invention, the detection and resolution of a conflict in a mono channel is carried out as follows.

The device listens on the channel in order to detect foreign transmissions. In the event that a foreign transmission is detected, the device breaks the mono channel and transmits a special sounding frame with its own address, which informs this device about whether there are similar mono channel breaks in other places or not. In the event that the device detects breaks in the monochannel, which means that some other device connected to the monochannel is trying to transmit its information, then this device switches to sending special frames to notify other devices of a conflict situation in the monochannel and after some time makes a second attempt to transmit his information. If a constant probe frame is returned and detects no breaks in the mono channel, this device enters the session mode and transmits information to the mono channel. After the end of information transfer, this device sends a special code to end the transfer and expects it to arrive after passing through the mono channel. The device then connects the mono channel.

Thus, the main advantage of the base object is the possibility of using a distributed method for controlling the data transmission system of the competition method. The essence of this method is that any station in a LAN,

possessing an analog device, it can transmit its information spontaneously at any time and at the same time is able to avoid the situation when two or more stations are trying to transmit simultaneously

your information.

However, this advantage is achieved by increasing the share of overhead information in the overall spread of the amount of transmitted information.

5 To eliminate this drawback of the base object (a more complex way to prevent conflict and only in the conditions of using a ring mono channel), a device that is technically

0 essence and the achieved result closest to the proposed invention. This device implements the functions of the state method for a ring LAN mono channel without sending any overhead frames 5 tokens.

The prototype device monitors the mono channel before and during the transmission of information; blocking the transmitter when a conflict is detected in the mono channel, delaying the retransmission after a conflict is detected in order to work back, which depends on the number of detected conflicts per unit time; disconnecting the communication channel when a conflict is detected in the mono channel.

The device comprises a receiver, the input of which is connected to the communication channel, a transmitter, a first trigger, the direct output of which is connected to the first input of the first

0 element And, a register, the first output of which is connected to the first input of the second element And, a chronizer, the first output of which is connected to the third input of the second element And, the second and third outputs of the chronizer 5 are connected respectively to the first and second inputs of the register, the third input of which is information input of the device, the third element And, and a counter connected in series, de0 encoder and a group of delay elements.

Thus, the prototype device allows you to apply in pure form the method of competition between stations for the right to own a monochannel and at the same time eliminates the main

5, the disadvantage of an analog device is to increase the amount of overhead information establishing a connection and disconnecting a LAN mono channel.

At the same time, the prototype device retains another commonality between the analog device and the prototype device, the disadvantage of which is that both devices assume that if the packet of information is successfully transmitted to the mono channel, until this packet is reaches the destination station, all devices connected to the mono channel block their transmitters and wait for release from the sent mono channel packet. Thus, the longer the mono channel, the more time the stations wait for a second attempt to transmit their information. This case refers to homogeneous packet flows in a mono channel, when a packet transmitted from one station to another necessarily goes to all other stations with equal probability, which is extremely rare in practice. In addition, both devices are able to effectively implement swap functions only when using a ring mono channel, capable of returning packets of information sent in a ring, packed in frames to the sending station in the likeness of a boomerang. When using a mono channel bus, special signal reflectors are required at the ends of the bus so that both devices can fulfill the above functions.

The aim of the invention is to increase the information content of the device, which in fact allows you to create a new generation of LANs with the so-called forwarding of packets to clusters of stations. Moreover, a new qualitative level of LAN throughput indicators is achieved without significant costs for station equipment.

The goal is achieved in that a device for transmitting discrete information in an annular communication channel, comprising a first receiver, the input of which is connected to the first communication channel, a transmitter, a first trigger, the direct output of which is connected to the first input of the first switch, a second trigger. the direct output of which is connected to the first input of the first element And, the first register, the first output of which is connected to the first input of the second element And, the third trigger, the output of which is connected to the second input of the second element And, chronically p, the first output of which is connected to the third input of the second element And, the second and third outputs of the chronizer are connected respectively to the first and second inputs of the first register, the third input of which is the information input of the device, the third element And, and the counter, decoder and series-connected a group of delay elements according to the invention are introduced

second switch, second, third and fourth receivers, second and third registers, comparison unit, fourth trigger, fourth to seventh elements I. elements 5 OR and the element OR NOT, the output of the transmitter is connected to the second input of the first switch and the first input of the second switch, the output of the first switch is connected to the first communication channel, the output of the second switch is connected to

. the second communication channel and connected to the inputs

second and third receivers, the first and

second outputs of the second receiver and output

third receiver connected to the first

5 inputs respectively of the first, second and third OR elements, the input and output of the fourth receiver are connected respectively to the first communication channel and the second input of the third OR element, the output of which is connected to the first input of the fourth OR element, the output of which is connected to the counter input and the input the third trigger, the first and second outputs of the first receiver are connected to the second inputs

5, respectively, of the first and second OR elements, the output of the first OR element is connected to the first input of the third AND element, the first inputs of the fifth and sixth OR elements, and the first inputs of the second and

0 of the third registers, the output of the second OR element is connected to the input of the chronizer, the fourth output of which is connected to the fourth input of the first register, the first input of the transmitter, the second inputs of the second and third registers, the first output of the second register directly, and the second outputs of the second register through the fourth element AND connected respectively to the third and fourth inputs of the third regi,

0 country, the first outputs of which are connected to the corresponding inputs of the fifth and sixth elements AND, the second output of the third register is the information output of the device and is connected to the second input

5 of the first AND element, the output of which and the output of the second AND element are connected respectively to the first and second inputs of the seventh OR element, the output of which is connected to the second inputs of the transmitter and the third

0 AND element, the output of which is connected to the second input of the fourth OR element, the output of the fifth AND element is connected to the first input of the eighth OR element. the output of which is connected to the S-input of the second trigger 5, the output of the sixth element And is connected to the R-input of the second trigger and is the address output of the device, the fifth output of the chronizer is connected to the first input by a comparison unit, the second inputs of which are combined with the corresponding inputs

of the seventh element And and connected to the corresponding outputs of the first register, the output of the seventh element And is connected to the first inputs of the seventh and eighth elements OR, the outputs of which are connected to the S-inputs of the fourth and first triggers, the sixth output of the chronizer is connected to the second inputs of the ninth and tenth elements OR. the seventh output of the chronizer is connected to the second input of the eighth OR element and the first input of the eleventh OR element, the second input and output of which are connected respectively to the output of the last delay element of the group and the S-input of the third trigger, the output of the comparison unit is connected directly to the second input of the fifth OR element and through an OR-NOT element with the second input of the sixth OR element, the output of which is connected to the R-input of the first trigger, the output of the fifth OR element is connected to the R-input of the fourth trigger, whose direct output is connected inen with the second input of the second switch.

The drawing shows a diagram of the proposed device for transmitting discrete information in an annular communication channel.

A device for transmitting discrete information in an annular communication channel contains, a first receiver 1, the input of which is connected to the first communication channel 2, a transmitter 3, a first trigger 4, the direct output of which is connected to the first input of the first switch 5, the second trigger 6, pr my output is connected to the first input of the first element And 7, the first register is 8, the first output of which is connected to the first input of the second element And 9, the third trigger 10, the output of which is connected to the second input of the second element And 9, chronator 11, the first output whose soy inen with the third input of the second element And 9, the second and third outputs of the chronizer 11 are connected respectively to the first and second inputs of the first register 8, the third input of which is the information input of the device 12, the third element And 13, and a counter 14, a decoder 15 and series-connected a group of delay elements 16, 17.

The second switch 18, second 19, third 20 and fourth 21 receivers are introduced into the circuit: second 22 and third 23 registers, comparison unit 24. fourth trigger 25, fourth 26, fifth 27, sixth 28, seventh .29 elements AND, elements OR 30-40 and the element OR NOT 41, the output of the transmitter 3 is connected to the second input of the first switch 5 and the first input of the second

switch 18, the output of the first switch 5 is connected to the first communication channel 2, the output of the second switch 18 is connected to the second communication channel 42 and connected

with the inputs of the second 19 and third 20 receivers, the first and second outputs of the second receiver 19 and the output of the third receiver 20 are connected to the first inputs of the first 30, second 31 and third 32, respectively

0 OR elements, the input and output of the fourth receiver 21 are connected respectively to the first communication channel 2 and the second input of the third OR element 32, the output of which is connected to the first input of the fourth element OR 33; the output of which is connected to the input of the counter 14 and the R-input of the third trigger 10, the first and second outputs of the first receiver 1 are connected to the second inputs of the first 30 and second, respectively

0 31 OR elements, the output of the first 30 OR element is connected to the first input of the third AND element 13, the first inputs of the fifth 34 and sixth 35 OR elements and the first inputs of the second 22 and third 23

5 registers, the output of the second element OR 31 is connected to the input of the chronizer 11, the fourth output of which is connected to the fourth input of the first register 8, the first input of the transmitter 3, the second inputs of the second 22

0 and the third 23 registers, the first output of the second 22 registers directly, and the second outputs of the second 22 registers through the fourth element And 26 are connected respectively to the third and fourth inputs of the third

5 23 registers, the first outputs of which are connected to the corresponding inputs of the fifth 27 and sixth 28 elements AND, the second output of the third register 23 is the information output 43 of the device and is connected to

0 the second input of the first element And 7 whose output and the output of the second element And 9 are connected respectively with the first and second inputs of the seventh element OR 36, the output of which is connected to the second inputs of transmitter 5 and the third element And 13, the output of which is connected to the second input of the fourth element OR 33, the output of the fifth AND element 27 is connected to the first input of the eighth element OR 37, the output of which

0 is connected to the S-input of the second trigger 6, the output of the sixth element And 28 is connected to the R-input of the second trigger 6 and is the address output 44 of the device, the fifth output of the chroniser 11 is connected to the first

5 by the input of the comparison unit 24, the second inputs of which are combined with the corresponding inputs of the seventh element And 29 and connected to the corresponding outputs of the first register 8, the output of the seventh element And 29 is connected to the first inputs of the seventh 36 and

of the eighth OR element, the outputs of which are connected to the S-inputs of the fourth 25 and the first 4 triggers, the sixth output of the chronizer 11 is connected to the second inputs of the ninth 38 and the tenth 39 elements of the OR, the seventh output of the chroniser 11 is connected to the second input of the eighth element OR 37 and the first input of the eleventh element OR 40, the second input and output of which are connected respectively to the output of the last delay element of group 17 and the S-input of the third trigger 10, the output of the comparison unit 24 is connected directly to the second input of the fifth element OR 34 and through the OR-NOT element 41 with the second input of the sixth element OR 35, the output of which is connected to the R-input of the first trigger 4, the output of the fifth element OR 34 is connected to the R-input of the fourth trigger 25, the direct output of which is connected to the second input of the second switch 18 .

The device operates as follows.

Depending on the situation in the mono channel and in the device, three main modes of operation of the device are possible. The first mode of the passive state is that the device has closed switches 5 and 18 and does not respond to incoming information from the mono channel. Information packets transit through closed switches 5 and 18, and the device thereby disconnects the station from the mono channel, not interfering with the operation of other active LAN stations. The shutdown is carried out along the line of the fourth output of the chroniser 11, along which clock pulses are transmitted, which shift information in registers 22, 23 and 8. If the chroniser 11 starts to produce clock signals at the fourth output, the device switches to one of the following two modes: reception or transmitting information. The information reception mode is as follows. that the device initializes the operation of registers 22, 23 and 8. As a result of this, packets of information of the left and the right of the pair of receivers 1, 21,20,19 begin to be received. Each information packet has a fixed length and is packed in a special frame, which necessarily has a header or preamble in accordance with international standards, a sender address and a recipient address, a frame type field, then an information packet itself, a frame trailer containing a code to check for errors in the frame . All attributes of a frame have a fixed length, therefore, any sequence of bits of a frame smaller than the minimum frame size is considered corrupted and lost. as a fragment of the conflict.

Each frame is transmitted in a man-partner code, which provides a 50% span and guarantees a transition of the signal level in the middle of each interval specified by the frequency of the clock signals at the fourth output of the chroniser 11. The first half of the bit interreps contains

10 is the inverse value of the bit, the second half is the true value of bit 3.

Receivers 1 and 19 extract two components from the sequence of the Manchester frame code: frame data signals and synchronization signals. According to the 1E.EE802.3 standard, the lines for the signals of the Manchester frame code are denoted by Rx, the data lines at the output of receiver 1 or 19 are denoted by RXD, and the clock line by RXC. Thereby from

0 of the total self-synchronizing frame signal stream on the Rx line, receivers 1 and 19 receive a data stream on the RXD line and a clock stream on the RXC line. Output signals of receivers 1 and 19 on line x

5 RXC go to the inputs of the element OR 31, the output signal of which acts on the clock input of the chronizer 11. As a result, the chroniser 11 generates clock signals at the fourth output with

0 frequency synchronous with the frequency of the synchronizing pulses in the channel. This ensures the mutual linking of the chronometers of various devices connected to the mono channel, and there may be several

5 hundred.

Receivers 21 and 20 perceive the presence of layers, her. If the signal transitions are not detected within the 0.7.5-1.25 bit interval, counted from the center of the last interval, then the carrier is considered absent, which indicates the end of the frame. Any other activity is recorded by the receiver 21 or 20 and on the SDT line of the output of the receiver 21 or 20

5, a conflict signal appears indicating the presence of a carrier in the mono channel. In the mode of receiving information, packets can arrive at the left 2 or right 42 terminals from the mono channel. In both cases, the incoming packet along the line from receivers 1 and 19 through the OR 30 element is fed to the information input (serial) of the parallel-serial register 22, which is capable of receiving a sequence of bits to a serial input under the control of clock signals from the fourth output of the chronizer 11, issue this sequence of bits from the serial output or issue this sequence in parallel code

to the inputs of the element And 26. The element And 26 recognizes the sequence of the preamble of the frame and in this case gives the output permission to receive a sequence of bits in parallel-serial register 23, into which the complete frame is written in the serial code under the control of the clock shift signals from the fourth output of the synchronizer 11 The frame is placed in register 23 in such a way that the address code is read by the And 28 element. If the recipient address in the frame matches the address of this device, the And 28 element issues a device to the address output properties (terminal 44), one bit of the sign of the presence of a frame in register 23 for the external device of the LAN station and, at the same time, sets the trigger latch 6 to 0. As a result of its direct output, trigger 6 blocks the And 7 element and prevents the distribution of the packet received in register 23, through the AND element 7 and the OR element 36 to the transmitter 3 on the line TXD.

Simultaneously with writing the packet to registers 22 and 23, the first bit of information “when the output of the OR element 30 through the OR element 35 is set, the trigger latch 4 is set to O, and through the OR element 34 the trigger latch 25. As a result, the state Switches 5 and 18 are turned off and the mono channel is broken. Thus, in the information reception mode, any packet received from the left or from the right is analyzed by the And element 28 and, if the received packet belongs to this device, it will not pass further and will remain in the registers 22 and 23 of this device. If this packet is addressed to another device connected to the monochannel, then the And 28 element does not work, the trigger 6 remains in state 1 and from the register 23 the packet is transmitted through the And 7 element, OR 36 to the transmitter 3 via the TXD line and then through closed switches 5 and 18 under the condition of free mono channel on the line to other destinations of the aircraft. As a result, this device selects its packets without passing them further along the mono channel and freely transmits other people's packets. Thus, the number of pass, e6v in; mb, on the channel is significantly reduced in contrast to the analogue and prototype of the proposed invention, where packets, even if they are addressed to this device, transit further through the mono channel and increase the residence time of each packet in the mono channel, preventing other devices transmit their information. This device is capable of storing a copy of someone else's packet, which can be used in case of damage to the packet forwarded in the event of a conflict. Copies can be stored in registers 22 and 23, as well as sent to external devices from the serial output of register 23.

The process of freeing the register 23 is controlled by the AND element 27, which, in the event of the zeroing of the register 23, acts through the OR element 37 on the input of the installation in 1 of the trigger-latch 6 and returns the trigger b to state 1, allowing the transfer through the And element 7. This ensures automatic recovery the initial state of the device after the end of the transmission of the received packet further or to the external device. A packet destined for this device is prescribed from register 23 to an external device via terminal 43.

Information transfer mode can be considered taking into account two states of receivers 2 and 9; conflict registration

by the presence of a carrier in the mono channel and the normal transmission of the packet to another destination. Conflict registration over the presence of a carrier in a monochannel (a constant component of the Manchester code) is performed

receivers 21. or 20, at the output of which, in this case, a mono channel activity signal appears. This signal is fed to the corresponding input of the OR 32 element and through the OR 33 element is fed to the input of the conflict counter in the mono channel 14. The signal from the output of the counter 14 acts on the conflict decoder. 15, which, depending on the code read from the counter 14, i.e. number of conflicts

selects one way or another through delay elements 16, 17. This controls the delay in waiting before retransmitting the device to the mono channel. The signal from the output of the last delay element selected by the decoder 15 is fed to the installation input of 1 trigger latch 10 through the OR element 40. The signal from the direct output of the trigger latch 10 allows the operation of the And 9 element to transfer the packet from the register 23. Setting the trigger to 0 the latch 10 is produced immediately after the signal from one of the receivers 21 or 20 is received at the input of the OR element 33. Thus, the transmitter is blocked through the And 9 element after the operation of one of the receivers 21 or 20. An approximately similar conflict protection scheme is used in the prototype (2) the present invention.

This device employs yet another level of protection against conflict. This stu

the stump is implemented on the And 13 element, where in the presence of any activity in the mono channel (signal appears on the SDT line) and the transmission of the received packet addressed to another device through the And 7 element, the And 13 element is also triggered through the chain of the OR 33 elements, counter 14, decoder 15 , delay elements 16, 17, OR 40 first sets trigger 10 to state 0 (via OR element 33), and then returns it to state 1, thereby resuming the transmission of the packet to the mono channel .. Here, as a sign of conflict, unlike the prototype ( 2) is the presence of signals on the lines RXD and TXD. Such a two-stage conflict protection circuit works more efficiently than a single-stage one and allows large deformations of signals in a mono channel, i.e. allows the use of a cheaper signal transmission medium, for example, a twisted pair of long-length conductors.

The native packet to be transmitted is placed in register 8, and it is transmitted as a sequence of bits along the first information input of register 8 from the information terminal of device 12. After the packet has filled register 8 under the control of clock signals from the fourth output of chroniser 11, its recipient address is read to the address analysis block 24 of the parallel code according to the enable signal from the seventh output of the chronizer 11. The address analysis block 24 implements threshold logical functions for comparing the recipient address and some Ora fixed value - a threshold block 24. The comparison is performed using the formula:

Ј o,. f (o,) 1,

eleven

2 SI, f (0 |) 0. I 1

r / fe «i is the corresponding bit of the n-bit recipient address code in the packet;

 - weight yes

TB - threshold switch unit 30.

The threshold is set in this way, that which relates to the values of p.

TB refers to devices, i

connected to the mono channel to the left of this structure, or else. what is the icon

and m Ј a - / 9 | TB relates to device 1 1

Am connected to the right of this unit. Therefore, if block 24 takes a single value, then with this signal it sets the OR element 34 to O

flip-flop 25, the direct output of which locks switch 18 and thereby cuts off the path of the transmitted packet on line T to the left. If block 24 assumes a value of zero 5, then through the AND AND NOT 41, OR 35 element, it sets trigger 4 to 0, disconnects switch 5, and cuts off the packet path along the TX line to the right. The analysis unit 24 can be implemented on the basis of a 10 programmable logic matrix or read-only memory with logical functions sewn there.

Chronization of the operation of the device is carried out according to the signals generated at seven outputs and at one input of the chroniser 11. Using the first output of the chronizer 11, the operation blocking element of the transmitter lock is issued. 9. In this case, if register 8 has a packet for

0 transfer, then he will do this on command from the first output of the chronizer 11 and provided that there is no or completion of the conflict (setting trigger 10 to 1). Using the second output of chronizer 11

5, the trigger 10 is forced to be installed through the OR element 40 at the beginning of the device operation, and the trigger 6 is forced to be installed through the OR element 37 as well. This allows forcing the transmission of the packet in the normal mode without conflicts. Using the third output of the chronizer 11, the triggers 4 and 25 are set to 1 through the OR elements 39 and 38, thereby connecting the switches 5 and 18, i.e.

5 transfer the device to an idle state, disconnect from the mono channel. The fourth output of the chronizer 11 produces a signal to clock the operation of the triggers 22, 23 and 8, as well as to synchronize the operation of the transmitter 3 in the information shift mode. The same output allows the device to go into an off state.

The fifth output of the chronizer 11 generates a signal for enabling the recording of a serial code from the input terminal of the device to register 8. The test output gives a signal to reset the register 8 in the case of a short stop of the device and its disconnection from the mono channel. The seventh output of the chroniser 11 generates an enable signal for the operation of the analysis unit 24. The single input of the chroniser 11 is used to externally synchronize the operation of the device from the monochannel via the OR element 31 from the synchronizing outputs of the receivers 1 and 19. The monochannel from the device is synchronized by the transmitter 3 Th. which the

. Converts two data streams on the TXD line and clock signals on the TX line into a common self-synchronizing signal stream in the Manchester code.

The completion of the transmission of the packet by this device is controlled by the AND element 29, which is triggered as soon as the register 8 is released (all bits go to state 0). The output signal 1 of the AND 29 element through the OR 38 element and the OR 39 element sets the triggers 25 and 4 to 1. These triggers directly connect the switches 5 and 18 and restore the mono channel connection. Thereby, a transition to the initial mode of disconnecting the LAN station from the mono channel is carried out.

Thus, three main modes of operation of the device are considered, which ensure disconnecting the device from the mono channel, receiving its frames and jamming them in this device, skipping other people's frames, blocking transmission in the event of a conflict (external) in the mono channel and its own conflict on the basis of signal coincidence on the line x receiving RXD and transmitting TXD, transmitting the packet in the direction in which the desired destination is located, automatically returning to the initial state of disconnecting from the mono channel.

Automatic transmission of the packet in the right direction is of great importance

in the monochannel bus. Thus, typically when a packet is transmitted in known devices, it propagates in both directions of the monochannel bus at once. This leads to

the packet moving on the bus blocks the transmitters of all other devices connected to the mono channel through the conflict protection circuits. Considering the fact that the pause time of each device increases with each unsuccessful attempt to transmit its information until the packet reaches the destination device to which it is addressed, and this can continue for a rather long time with an increase in the monochannel valley (and it amounts to modern LANs of ten kilometers), all devices connected to the mono channel are silent. Naturally, this circumstance significantly reduces the number

packets that were successfully transmitted in the time interval necessary for successful transmission of a packet of a fixed length, i.e. LAN bandwidth. The reduction in throughput increases further with increasing incoming load. Incoming load - the total number of packets submitted to the network for transmission over the time interval necessary for successful transmission of the packet

fixed length. The average transmission delay time, as an indicator of user throughput, is the average time from the time the packet was first generated until it was successfully received at the destination,

Formula of a sample A device for transmitting discrete information in an annular communication channel, comprising a first receiver, the input of which is connected to the first communication channel, a transmitter, a first trigger, the direct output of which is connected to the first input of the first a switch, a second trigger, the direct output of which is connected to the first input of the first element AND, the first register, the first output of which is connected to the first input of the second element I. the third trigger, whose output is connected to the second input of the second element I. synchronizer, the first output to connected to the third input of the second element And, the second and third outputs, respectively, with the first and second inputs of the first register, the third input of which is the information input of the device, the third element And

connected by a counter, a decoder and a group of delay elements, characterized in that, in order to increase the information content of the device, a second switch, second, third and fourth receivers, second and third registers, a comparison unit, a fourth trigger, fourth and seventh elements And , OR elements and OR-NOT element, the output of the transmitter is connected to the second input of the first switch and the first input of the second switch, the output of the first switch is connected to the first communication channel, the output of the second switch to the second channel with communication and is connected to the inputs of the second and third receivers, the first and second outputs of the second receiver and the third receiver output coupled to the first inputs of respective first, second and third element or fourth input and output

the receiver is connected respectively to the first communication channel and the second input of the third OR element, the output of which is connected to the first input of the fourth OR element, the output of which is connected to the counter input and the R-input of the third trigger, the first and second outputs of the first receiver are connected to the second inputs, respectively, of the first and the second OR element, the output of the first OR element is connected to the first input of the third AND element, the first inputs of the fifth and sixth OR elements and the first inputs of the second and third registers, the output of the second This OR is connected to the input of the chronizer, the fourth output of which is connected to the fourth input of the first register, the first input of the transmitter, the second inputs of the second and third registers, the first output of the second register directly, and the second outputs of the second register through the fourth AND element connected to the third and fourth inputs, respectively third register, the first outputs of which are connected to the corresponding inputs of the fifth and sixth elements AND, the second output of the third register is the information output of the device and is connected is connected to the second input of the first AND element, the output of which and the output of the second AND element are connected respectively to the first and second inputs of the seventh OR element, the output of which is connected to the second inputs of the transmitter and the third AND element, the output of which is connected to the second input of the fourth OR element, output of the AND element is connected to the first input of the eighth OR element, the output of which is connected to the S-input of the second trigger, the output of the sixth AND element is connected to the R-input of the second trigger and is the address output of the device, the fifth output is chron the isator is connected to the first input of the comparison unit, the second inputs of which are combined with the corresponding inputs of the seventh AND element and are connected to the corresponding outputs of the first register, the output of the seventh element And is connected to the first inputs of the seventh and eighth elements OR, the outputs of which are connected to the S-inputs of the fourth and first flip-flops, the sixth output of the chronizer is connected to the second inputs of the ninth and tenth OR elements, the seventh output is connected to the second input of the eighth OR element and the first input of the eleventh OR element, the second input d and whose output is connected respectively to the output of the last group delay element and the S-input of the third trigger, the output of the comparison unit is connected directly to the second input of the fifth OR element and, through the OR-NOT element, to the second input of the sixth OR element, the output of which is connected to By the R-input of the first trigger, the output of the fifth OR element is connected to the R-input of the fourth trigger, the direct output of which is connected to the second input of the second switch.