SU1522417A1 - Communication system with message-relaying - Google Patents

Abstract

This invention relates to radio. The purpose of the invention is to increase the capacity of the communication system. The message relay communication system comprises transmitting and receiving parties and a repeater. When a message is transmitted from the sending side, the elements of the "Start of transmission", "End of transmission" signals and symbols of message combinations are emitted. Upon reception of the transmitted message signals by the repeater, they are processed. The repeater inputs a relay tracking signal and blocks the reception after retransmission of the message for a time equal to the duration of the relayed message. When receiving a message from the repeater by the second repeater, the reception lock is excluded after the second repeater retransmits and the message is retransmitted without tracking retransmission signals. Such an algorithm for the operation of repeaters eliminates looping in their work without reducing the capacity of the communication system. 2 hp f-ly, 3 ill.

Description

one

(21) 4315265 / 24-09

(22) 10/09/87 (46) 11/15/89. Bul № 42 (72) I.I. Rodkin, V.A.Romanov, V.I.Bal bin and S.V.Denezhkin

(53) 621.396.6 (088.8)

(56) Livshits A.R. et al., Theory and design of multichannel communication systems for spatially dispersed objects. L .: OGU, 1975,

with. 91-92.

Copyright svdedelstvo USSR № 1075426, cl. H 04 B 7/24, 1984.

(54) COMMUNICATION SYSTEM WITH RETRAINING MESSAGES

(57) The invention relates to radio. The purpose of the invention is to increase the capacity of the communication system. The communication system with message retrieval contains transmitting and receiving parties and a repeater. Lrie

the transmission of the message from the transmitting side is emitted the elements of the signals. Upon reception of the transmitted message signals by the repeater, they are processed. The repeater inputs the retransmit tracking signal and blocks the reception after retransmission of the message for a time equal to the duration of the relayed message. When receiving a message from the repeater by the second repeater, the reception blocking is eliminated after the retransmission by the second repeater and the message is retransmitted without being accompanied by a retransmission signal. Such an algorithm for the operation of repeaters eliminates looping in their work without reducing the capacity of the communication system. 2 hp f-ly, 3 ill.

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The invention relates to radio and can be used in the transmission of telecontrol and tele-signaling signals to a large group of distributed objects in the presence of areas of uncertain reception, as well as the collection of information from these objects.

The aim of the invention is to increase the capacity of the communication system.

Fig. 1 shows a structural electrical circuit of the transmitting side of the communication system; Fig. 2 shows a structural electrical circuit of a repeater of a communication system; FIG. 3 is a diagram of the receiving side of the communication system.

The system contains on the transmitting side 1 a source 2 of information with error-correcting coding, a switch 3, a generator of 4 clock pulses, a generator of 5 trigger pulses, a transmitter 6, an antenna 7 and a driver 8 of interaction signals containing a sensor 9 of a signal. the element OR 11 and the counter 12.

The repeater 13 comprises an antenna 14, a receiver 15, a synchronizer 16,

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error protection block 17, clock generator 1 18 pulses, transmitter 19, first 20 and; 21 more switches, interaction signal reception unit 22, third switch 23, relay tracking signal receiving block 24, relay tracking signal generator 25, first Fifth elements 1-ШИ 26 - 30, first 31 and second 32 counters, number setting unit 33, subtractor 34, first - third triggers 35-37, random access memory unit 38, number comparison unit 39 and interaction signal generator 40 that contains a sensor . 41 signals The end of the transmission, the sensor 42 of the signal The start of the transmission, the element OR 43 and the counter 44.

Receiving side 45 of the communication system consists of a receiver 46, a synchronizer 47, an error protection block 48, information recipient 49, an interaction signal receiving block 50 and an antenna 51.

Transmission with retransmission of messages in the system proceeds as follows,

When the power is turned on at the transmitting side 1, the driver 8 of the interaction signals is set to the initial state. At the same time, the outputs of the transfer mode number of the imaging unit 8 connected to the control inputs of the switch 3 are set to level O signals. The switch 3 connects the channel outputs to its zero non-active inputs by the indicated signals, thereby preventing the clock pulses from the generator 4 clock pulses per source 2 information. And modulating signals to the input of the transmitter 6.

When a message is transmitted from the transmitting side 1, a signal is received from the trigger pulse generator 8 from the generator 5 trigger pulses, which through the OR element 11 sets the counter 12 into one state and starts the transmission sensor 10 via the trigger input. The single state of the counter 12 provides the connection of the first output of the switch 3 to the second input and the disconnection of the second output. The sensor 10 of the signal. The beginning of the transmission generates elements of the 5 clock pulses using the signals of the generator.

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The start of the signal from the starting output of the imaging unit 8 through the switch 3 is sent to the transmitter 6 and then radiated by the antenna 7. As a signal to begin the transmission, the recurrent sequence generated by the sensor 10 can be applied. output Stop sensor 10 generates a signal that through the OR element. 11 enters the counter 12 and changes its state per unit. According to the changed state of the counter 12, the switch 3 connects the first input to the first output, and the second input to the second output. Through the second input of the KOMt-gutator 3, the clock input of the information source 2 receives signals from the 4-clock pulse generator. The source 2 of information on these signals forms symbols of message combinations, which through the first input of switch 3 arrive at the input of transmitter 6 and are radiated by antenna 7. Source information 2 can be implemented, for example, in the form of a storage of combinations of message alphabet and a noise-resistant coding device which, according to the clock signals, encodes the combinations of the alphabet of messages and when reading from the accumulator the last combination of messages forms on an additional

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In the code signal The accumulator is empty (standing signal. The stop signal from the second output of information source 2 triggers sensor 9 to signal the end of the transmission and is changed from 1 to 12 e per unit of counter 12 state. Under the influence of signals from counter 12, switch 3 connects the first output to the fourth input and disables the second output, which ensures the arrival of signal elements. The end of the transmission from the output of the sensor 9 to the input of the transmitter 6. The sensor 9 of the signal. The end of the transmission after the end of the formation of the signal. The end of the transmission forms At its output, the stop signal is set to the initial state.When counter 12 is reset, the switch 3 turns off both outputs, which ensures readiness for a new transmission cycle of the transmitting side 1. As a signal, the end of the transmission

can be applied, for example, a recurrent sequence that is different from the sequence Start of transmission.

When the power is turned on at the repeater 13, the triggers 35, 36 and 37, the counters 31 and 32, and the counter 44 are set to the zero state.

Shaper 40 of the JQ interaction signals are set to a combination of numbers. By

STI At the same time, the first switch 20 switches off the first and quarter outputs from the outputs of the transfer mode number of the driver 40 of the outputs of counter 44, connects the second and third outputs to the sixth and third inputs respectively, the second switch 21 po connects the first and second the output, respectively, to the first and second inputs, the third switch 23 connects the first and second inputs respectively to the first and third output, the input of the number setting unit 33 is connected via the switch 14 to the bus with a signal level O, the control inputs of the number comparison unit 39 and the operational storage unit 38 from the output of the trigger 36 receive a level O signal, which prohibits the comparison of numbers in the block 39 and provides a recording mode in the operational storage unit 38. The sensors 41 and 42 of the driver 40 of the interaction signals set to ready to form signals. Start and end of transmission.

When receiving the transmitted message signals, the signal from the antenna 14 of the transponder 13 arrives at the receiver 15 and then to the blocks 22, 24 receiving the interaction and tracking signals, the error protection block J 7 and the synchronizer 16. At reception 15

20

Counter 32 combinations set the write numbers of the operative storage unit 38. After receiving the start of transmission, incoming message protection symbols received from the error protection block 17 are written into counter operative storage unit 38 cells set by the counter 32. Writing to the operational memorizing unit 38 continues until reception Signal The end of the transmission unit 22 receiving signals interaction. After receiving the signal. The end of the transmission at the end of block 22, connected to the starting input of the imaging unit 40 and the input of the OR element 30, generates a signal that the trigger 35 is set to the zero state through the ShSh 30 element and thus the recording is reduced to operational a storage unit 38, start-up of a signal sensor 42 Starting transmission and setting counter 44 to one state. According to the signals of counter 44, switch 20 connects the first output to the second input, and disconnects the remaining outputs, which ensures the connection of the output of sensor 42 of the signal. The transmission starts to the input of the transmitter 19 (through the first switch 20). Formed by the sensor 42 according to the clock signals of the generator 18 clock pulses the signal symbols The beginning of the transmission ne30

35

At the signal, the start of the transmission of the synchronization signal is transmitted by the transmitter 19 and the emit radiation of I6 ensures the formation of local clock signals synchronously with the clock signals of the generator 4 clock pulses of the transmitting side 1. According to the clock signals of the synchronizer 16, the interaction signal reception unit 22 processes the received signals and, in the presence of a reception signal, the Transmission Start generates a signal at the output connected to the trigger input 35. On a signal the start of the transmission, the trigger 35 is set to one. The signal from the output of the trigger 35 second

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with antenna 14. After the formation of the signal is completed. Start of transmission at the output. Stop of sensor 42. A signal is generated, which through the element OR 43 enters the counter 44.- and through the second start the output of the driver 40 to the trigger input 36 and through the element ШШ 26 to the installation input of the counter 32, set it back to its original state. The trigger signal 36 switch 21 connects the second output to the third input and disables the first output, which ensures the flow to the main input of the counter

the switch 21 connects the first and second outputs respectively to the first and second inputs, which provides signals from the synchronizer 16 to the counting inputs of the counters 31 and 32. The counters 31 and 32 start counting the signals from the synchronizer 16. When the outputs are counted

combinations of numbers are established. By

Counter 32 combinations set the write numbers of the operative storage unit 38. After receiving the start of transmission, incoming message protection symbols received from the error protection block 17 are written into counter operative storage unit 38 cells set by the counter 32. Writing to the operational memorizing unit 38 continues until reception Signal The end of the transmission unit 22 receiving signals interaction. After receiving the signal. The end of the transmission at the output of block 22, connected to the starting input of the imaging unit 40 and the input of the OR element 30, generates a signal that triggers the 35 into the zero state and thereby shortens the recording of the signals to the operational memory. unit 38, starting the sensor 42 of the signal. Begin transmission and set the counter 44 to one state. According to the signals of the counter 44, the switch 20 connects the first output to the second input, and disconnects the remaining outputs, which connects the output of the sensor 42 of the signal. Start of transmission to the input of the transmitter 19 (via the first switch 20). Formed by the sensor 42 according to the clock signals of the generator 18 clock pulses the signal symbols

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with antenna 14. After the formation of the signal is completed. Start of transmission at the output. Stop of sensor 42. A signal is generated, which through the element OR 43 enters the counter 44.- and through the second start the output of the driver 40 to the trigger input 36 and through the element ШШ 26 to the installation input of the counter 32, set it back to its original state. The trigger signal 36 switch 21 connects the second output to the third input and disables the first output, which ensures the flow to the main input of the counter

The 32 clock signals from the generator 28 are allowed to be compared in the number comparison block 39 and the read mode from the operational storage unit 38 is set. The input of the number setting block 33 from the fifth input of the switch 20 receives a level 1 signal, which sets the number code at the outputs of the block 33 Equal to the number of elements of the signal End of transmission, which ensures the installation of the code of the number at the outputs of subtractor 34, equal to the code of the number of the counter 31, reduced by the number of signals sent by the end of the transmission. This circumstance makes it possible to exclude reading of the received signal symbols recorded in it from the operational storage unit 38. Transmission termination. According to the signals of the generator 18, the counter 32 sequentially changes the codes of the numbers on the outputs of its bits, which ensures the sequential reading of the message symbols recorded in the operational storage block and transmitting them through the first input of the switch 20 to the input of the transmitter 19. the transmission retransmits the previously received message. The reading of information from the random access memory block continues until the codes of the numbers at the outputs of the counter 32 and the subtractor 34 are equal. When the indicated codes of numbers match, which takes place after scoring the last character of the previously recorded message from the operational storage unit 38, the number comparison unit 39 generates at its output a signal that enters the counting input of the counter 32 and the third input of the switch 20. The account

Signal generator 18 counter 32

stopping, and, therefore, stopping information from the operational storage unit 38. The signal from the output of the block 39 through the fourth output of the second switch 20 goes to the switching input of the driver 40 and the first input of the third switch 23. From the first output of the switch 23 this signal goes to the starting input a retransmission tracking signal generator 25. From the switching switch of the shaper 40, the signal enters through the OR 4 element to the counter 44 and changes its state

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connection, which leads to connecting the first output of the first switch 20 to the fourth input and disconnecting the other outputs. Under the action of signals from generator 18, shaper 25 of the tracking signal forms the symbols of this signal, which from the output of shaper 25 through the OR element 28 and switch 20 arrives at the transmitter 19 and is transmitted via the antenna 14. A recurrent sequence is taken as a signal of the relay. , formed in the same way as the sequences of signals. Start of transmission and End of transmission. After the formation of the signal is completed. Retransmission support at the output Shutdown of the driver 25 generates a signal that through the OR element 29 enters the table input of the driver 40 of the interaction signals. This signal is the start of the sensor 41 signal The end of the transfer. Signal symbols The end of the transmission from the second stop output of the transmitter 40 is transmitted through the element OR 28, the fourth input of the first switch 20 to the transmitter 19 and overeat by the antenna 14. After the generation of the signal symbols is completed. The end of the transmission at the output Stopping the sensor 41 generates a signal that sets the counter 44 to the initial state and from the first stop output of the former 40 is supplied via the third output of the third switch 23, the OR element 26 to the installation input of the counter 32. The signal from the output of the counter 44 com utator 20 is set to an initial state that provides transfer lock (I9 transmitter disable input). Installing the counter 32 leads to a violation of the equality of the codes at the inputs of the number comparison unit 39 and, therefore, to the removal of the counter-inhibiting signal to the counter 32. The counter 32 starts counting the signals of the generator 18. At the same time, reading signals from the cells of the block 38 is not accompanied by their transmission, since the switch 20 has disconnected the transmitter input from the output of the block 38. The counting in the counter 32 continues until the equality of the codes at the inputs of the number comparison block 39 is established. At the moment of equality of codes, the signal from the output of block 39 blocks the counter

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91522417

32, and passing from the third input to the third output of the first switch 20, through the OR element 27 enters the set inputs of the counter 31 of the trigger 36, respectively, and through the OR element 26, the set input of the counter 32, as well as the set input of the trigger 37. of these elements in the zero state, which ensures the alternate reception mode of the repeater 13. From the above, it follows that when a message is received, the repeater 13 inputs the retransmission tracking signal and blocks the reception after retransmission of the message time equal to the length of the relayed message.

When receiving a relayed message (with a retransmission tracking signal located in front of the End of Transmission signal), the reception of the signal and transmission of the message elements proceed as described above, and after receiving the Retransmit Acceptance signal by the unit 24, the processes proceed in another way. The signal from the output of the block 24 sets the trigger 37 to one state and through the CRPD element 30 sets the trigger 35 to the zero state. At that, only the tracking signal of the retransmission is recorded in the block 38, and the recording of the signal does not stop. reception of this signal, the operation of the counters 31 and 32 is terminated. By signal reception

The end of the transmission from the output of block 22 switches the repeater 13 to the transfer mode. Signal Transmission Process The start of transmission and message symbols from block 38 proceeds as described in paragraph 6. The signal from the output of the number comparison unit 39, passing from the third input to the fourth output of the first switch 20, through the second output of the third switch 23 and the OR 29 element triggers the start of the signal sensor 41.

transmissions (instead of triggering the relay follower shaper 25). After the transmission of signal elements The end of transmission by signal Stop from the output of sensor 41, coming through the fourth output of the third switch 23 and the element OR 27. The installation of triggers occurs

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36 and 37 to the zero state, reset of the counter 31 and through the OR element 26 of the counter 32.

Thus, when receiving a message from a repeater by the second repeater, the reception blocking is eliminated after the second repeater is retransmitted and the message is retransmitted without being accompanied by a retransmission signal. Such an algorithm for the operation of repeaters eliminates looping in the operation of repeaters without reducing the capacity of the communication system.

Claims (3)

1. A message relay communication system comprising on the transmitting side a serially connected information source, a switch, a transmitter and an antenna, a starting pulse generator and a clock pulse generator, the code of which is connected to the second input of the switch, on the retransmitter - serially connected antenna, receiver and synchronizer, the output of which is connected to the clock input of the error protection unit, the input of which is connected to the output of the receiver, serially connected. The first switch and transmitter, output which is connected to the antenna, clock generator, the first element OR, the first estimator and the first trigger, and on the receiving side - serially connected antenna, receiver and synchronizer, the output of which is connected to the clock input of the error protection unit, the receiver output is connected to the information input of the unit error protection, the output of which is connected to the information input of the recipient of information, characterized in that, in order to increase throughput I, a transmitting signal generator is introduced on the transmitting side. stg-: VIA ,. the outputs of the transfer mode number of which are connected to the control inputs of the switch, the output of the start-up pulse generator is connected to the start input of the interaction signal generator, the start output of which is connected to the third input of the switch, the second output of the switch is connected to the clock input of the information source, the second output which is connected to the stop input of the interaction signal generator, the output of the clock pulse generator is connected to the clock input of the interaction signal generator, the table output of which is connected to the fourth input of the switch, on the repeater the interaction signal reception unit, the interaction signal generator, the relay support signal reception unit are inserted, the second, third, third and fifth elements OR, the second switch, the third switch, the second counter, the number setting unit, the OUTPUT, in opy and third triggers, number comparison unit and random access memory unit, the output of which is connected to the first input of the first switch, the control inputs of which are connected to the outputs of the transfer mode number of the interaction signal generator, the first starting output of which is connected to the synchronizer with the clock inputs of the block of the signal of the retransmission and the block of reception of the signals of interaction and with the first and second inputs of the second switch, the first output of which connected to the counting input of the first counter, the output of which is connected to the input of the decrement number of the subtractor, the second output of the second switch is connected to the counting input of the second counter, the output of which is connected to the input of the address setting of the operational memory, the block and the input of the first compared number of the number comparison unit whose output is connected with the third input of the first switch and with the input of the resolution resolution of the second counter, the second output of the first switch is connected to the input of the number setting block whose output is n with the input of the subtracter's subtractive number, the output of the subtractor is connected to the input of the second comparable isla comparison block, the start output of the interaction signal receiving block is connected to the input of the first trigger, the output of which is connected to the first control input of the second switch, the second start output of the interaction signal generator is connected the first input of the first element OR and the input of the second trigger, the output of which five 0 five 0 five 0 five 0 five connected to the second control input of the second switch, the resolution input of the number comparison unit, the control mode input of the on-line storage unit and the control input of the receiver, the third code of the first switch is connected to the switching input of the interworking signal generator and the first input of the third switch, the quarter output of the first switch is connected with the first input of the second element OR, the output of which is connected to the second input of the first element OR, the installation inputs of the first counter and the second and third its triggers, the first stop output of the interaction signal generator is connected to the second input of the third switch, the first output of which is connected to the input of the relay tracking signal generator, the output of the pulse generator is connected to the third input of the second switch and the clock inputs of the interaction signal generator and the relay tracking signal generator the output of which is connected to the first input of the third OR element, the second output of the third switch is connected to the first input of the fourth The second OR element whose output is connected to the stop input of the interaction signal generator, the second stop output of which is connected to the second input of the third OR element, the output of which is connected to the fourth input of the first switch, the stop output of the tracking signal generator is connected to the second input of the fourth OR element, the third output of the third switch is connected to the third input of the first element OR, the output of which is connected to the installation input of the second counter, the output of the signal receiving unit The retransmission accompaniment is connected to the first input of the fifth OR element and the third trigger input, the outputs of which are connected to the control inputs of the third switch, the fourth output of which is connected to the second input of the second OR element, the receiver output is connected to the input of the retransmission accompaniment signal unit and with the input of the interaction signal receiving unit, the stop output of which is connected to the start input of the interaction signal conditioner and with the second input of the fifth CRPD element, the output of which is connected to the mouth First by the 1st trigger of the first trigger, the output of the error protection block is connected to the information input of the operational storage unit, the fifth input of the first switch is connected to the bus with a signal level 1, and the sixth input of the first switch is connected to the bus with a signal level o, and on the receiving side a block is entered receiving the interaction signals, the start and stop outputs of which are connected to the corresponding inputs of the receiver of information, the output of the receiver is connected to the input of the block for receiving interaction signals, the clock input of which is connected n to the output of the synchronizer. 2. The communication system in accordance with claim 1, d and i, is that the driver of the interaction signal of the transmitting side consists of a signal sensor. The end of the transmission and the serially connected sensor of the signal. transmission of the interaction signal generator, the sensor input of the signal The end of the transmission is connected to the second input of the OR element and is the stop input of the signal conditioning generator mode, the signal sensor input. The start of the transfer is connected to the third input of the OR element and is the starting input of the interaction signal conditioner, the output of the signal sensor. The end of the transmission is connected to the installation input of the counter, the clock inputs of the signal sensors are the Start of transmission and the End of transfer. "With n five 0 five 0 the driver of the interaction signals, the second outputs of the sensors of the signals. The start of transmission and the end of transmission are respectively the start and stop outputs of the driver of the interaction signals. 3. A communication system according to claim 1, characterized in that the transponder interaction driver is composed of a signal sensor. The end of transmission and the serially connected signal sensor. The beginning of the transmission of the OR element and the counter, whose outputs are the outputs of the transmission mode number of the interaction signal generator, signal sensor input The start of the transmission is connected to the second input of the OR element and is the starting input of the interaction signal conditioner, the third input of the OR element is the switching input of the reacting ers signals input sensor signal transmission Leaving is the stop input of signals {mutually interacting, the sensor output signal is coupled to transmit End adjusting input of the counter and the stop is the first output of the reaction signal, outputs the second signal sensor and transmission Start End. The transmissions are the first start and second stop outputs of the interaction signal conditioning unit, the first downstream of the signal sensor. Transmission start is the second stop output of the interaction signal conditioner, the clock inputs of the transmission signal sensors and the end of transmission are connected and are the clock input of the interaction signal generator. one. 1 5 / yI U 46 -ni / f7 J l 49 ".five