SU1506560A2 - Arrangement for remote monitoring of regenerators of communication line - Google Patents

Abstract

The invention relates to telecommunications. The purpose of the invention is to improve the accuracy of telecontrol by reducing the time of interfering influence on the regenerators when measuring the noise margin of the regenerators of the communication line without disturbing the communication channel. To achieve the goal, a second additional key block, a time slot generator, a front selector and an error counter are entered into the device. When measuring the noise margin of regenerators, there is no deterioration in the reliability of information transmission over communication channels below the permissible value. 4 il.

Description

The invention relates to telecommunications, can be used for telecontrol of communication lines with intermediate stations installed on them, and is an improvement of the telecontrol device of communication line regenerators by auth. No. 1283986.

The purpose of the invention is to improve the accuracy of telecontrol by reducing the time of the interfering effect on the regenerators when measuring the noise margin of the regenerators of the communication line without disturbing the communication channel.

FIG. 1 shows a structural electrical circuit of a telecontrol device of communication regenerators; in fig. 2 - structural electrical circuit of the front selector; in fig. 3 is a structural electrical circuit of a time interval generator; in fig. 4 is a structural electrical error counter circuit.

The telecontrol device of the link regenerators (Fig. 1) contains at the terminal station 1 a telecontrol driver 2, a remote control receiver 3, a control signal receiver 3, and 4 each remote control channel 5 telecontrol channel 6 telecontrol, control channel 7 of controlled regenerators 8, key block 9 , shift register 10, switch 11, peak detector 12, code detector 13, one-shot 14, element ШШ-НЕ 15, element OR 16, key 17, pilot signal generator 18, first additional block 19 of keys, trigger 20, optocouplers 21, second will complement flax key unit 22, driver 23 slots, the front extractor 24 and the counter 25 errors.

Shaper 23 time intervals (figure 2) consists of a counter 26 and a decoder 27, the inputs of which coi (L

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are connected with the corresponding outputs of the counter 26, the counting input of which is the counting input of the generator of 23 time intervals, the setup input of which is the installation input of the counter 26, and the output of the decoder 27. The front lane 24 (FIG. 3) consists of Element 28 OR and D - trigger 29, inclusive in division mode by 2. Error counter 25 (FIG. 4) consists of counter 30 and decoder 31.

The device works as follows.

During normal operation, all the telecontrol nodes at the end station 1 and intermediate station 4 are de-energized and do not affect the digital signal transmission. If it is necessary to check the monitored regenerators 8 at one of the intermediate stations 4, they are first checked without measuring the noise immunity. In this case, the shaper 2 remote control commands are turned on, and the remote control channel 5 is given commands for switching non-switches, 11, operating according to the following algorithm: on the first command it switches on the first switch from the first stage 11, on the second command the team is left on the second stage at this intermediate station 4 and the first stage of the hub on the next intermediate station -. When the first stage of the switch 11 is turned on, the resolution signal is supplied to the shift register 10 and the OR element 16, the same meter, 1 m, the monitoring of the regenerators 8 of this intermediate station 4 is unambiguously monitored. To halve the length of the shift register 10 and reduce the required the number of commands for its control, the controlled regenerators 8 in the intermediate station 4 are divided into two groups, the choice of which is determined by the presence or absence of a signal at the output of the second stage of the switch 11 supplied to the key block 9.

The choice of the controlled regenerator 8 within the group is determined by applying the appropriate command from the driver 2 telecontrol commands on the control channel 7 to the input of the shift register 10. At the same time on the first output of the register 10 shift in

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There is 1 pulse, which, through the edge selector 24, in the form of a narrow 1 pulse arrives at the setup inputs of the shaper 23 time slots and the error counter 25 and performs the initial setting of the shaper 23 time slots and zeroing the counts of the bugs 25 errors. Next, at the outputs of the shift register 10, a combination of signals is established so that the controlled output of the desired controlled regenerator 8 is connected to the inputs of the peak detector 12 and the detector 13 of the code. During normal operation of the controlled regenerator 8 (the presence of pulses at its output and the absence of code violations), all the inputs of the OR 16 element are transmitted to signals that, passing through it, open the key 17, and the signal of the control signal generator 18 goes through the key 17 to channel 6 telecontrol and is recorded at end station 1 by receiver 3 of the pilot signal. In the absence of pulses at the control output of the controlled regenerator 8, the peak detector 12 generates a signal which, through the OR element 16, locks the key 17, thereby interrupting the signal of the control signal generator 18 fixed by the receiver 3 of the control signal. Each violation of the code at the control output of the controlled regenerator 8, allocated by the detector 13, triggers the one-shot 14 and locks the key 17 through the element OR-NE 15 necessary for matching the levels, which interrupts the signal from the control signal generator 18, which is fixed at the terminal station 1 receiver 3 control signal. The pulse duration at the output of the one-shot 14 is chosen so that even a single error of the controlled regenerator 8 is reliably recorded by the receiver 3 of the control signal. At the same time, from the trigger output 20 pa the enabling input of the key block 19 receives the signal O. At the outputs of the key block 19, at the outputs of the optrons 21, at the outputs of the key block 22, at the output of the driver 23 time intervals, at the output of the front 24 selector and on the output of the 25 error counter also contains zero signals, as a result of the controllable regenerators 8, there is no effect,

A check is then made of the controlled regenerator 8 when measuring the noise margin by shifting the trigger threshold of the regenerator. Suppose we check the Kth regenerator of the first group. After checking it without changing the noise immunity, a command is sent from driver 2 via channel 7 to the input of shift register 10. This command consists of two series of pulses. The first series contains (pK) pulses, which leads to the appearance of pulse 1 at the nth output of the shift register 10. This signal transfers the D flip-flop 20 to the second steady state, and the shift register 10 returns to the initial state. Then the second series of pulses in the command from the driver 2 remote control commands on channel 7 is again fed to the shift register 10, and the signal 1 is set at its 4th output.

This thereby ensures that the controlled output of the K-th regenerator is again connected to the inputs of the peak detector 12 and the detector 13 code. Logic 1 from the output of the D-flip-flop 20 allows the command to pass also to the K-th output of the block of 19 keys. This command, in the form of 1, through the optocoupler 21, acts on the regenerator 8, changing the division ratio in its threshold control circuit. At the same time, at one of the address inputs of the key block 22 there is a logical 1, which allows passing through the block 22 with the key signal from the output of the control signal generator 18 to the counting input of the former 23 time intervals and the signal from the output of element 15 of the IPI-NOT to the counting input of the counter 25 mistakes. Through the time, expressed in the number of frequency pulses produced by the generator 18 of the control signal at the outputs of the counter 26. 2) there is such a combination of signals that at the input of the decoder 27 there is a pulse 1, which through the front selector 24 sets the shaper of 23 time intervals and zeroes the counter of 25 errors, if during this time the counter input of the error 25 does not A certain number of 1 pulses will arrive. If for from 065606

time between 1 pulses at the output of the imager 23 time intervals to the input of the counter 25 errors received 1 pulses less than the number determined by the decoder 31 of the counter 25 oga-. sideways, this means that the reliability of information transfer of the controlled regenerator 8 when measuring the noise immunity margin is higher than permissible and that the measurement of the noise immunity margin of the controlled regenerator can be continued. It should be noted that the reliability of information transfer is a value that characterizes the average number of characters of information, which is one error symbol. So, authenticity

20 10 means that there is one error per thousand characters of information. When measuring the margin of interference immunity, the reliability of information transfer for the controlled regenerator 8 is permissible. The maximum possible time interval for error counting is allowed and the number of errors allowed on this time interval is 10 transmission reliability, taking into account the counters 26 and 30 as well as the complexity of the decoders 27 and 31. The noise immunity is measured

, until the command from the driver of the 2 remote control commands to disable the interfering effect or did not automatically disable it. An automatic Q switching off of the interfering action is performed as follows. If over the length of time between two 1 pulses at the output of the former 23 time intervals, defined by the decoder 27, the counting input of the error counter 25 received the number of 1 pulses determined by the decoder 31, then the output of the decoder 31 is 1 imgp pulse, which , getting to the corresponding input of the counter 30, transfers it to the Inhibit Counting mode, hits the third input of the trigger setup 20, translates it to the zero state,. thereby removing the interfering effect on the regenerators 8 and the passage through the block 22 of the keys of the signal from the output of the OR-NOT 15 element and the signal from the output of the generator 18 is prohibited

a control signal for the estimated flow, respectively, of the counter of 25 errors and the generator of 23 time intervals. Impulse 1 from the output of the 25 error counter also goes to the fourth input of the element OR 16. At the output of the element OR 16, a signal is set that, on entering the first control input of the key 17, prevents the control signal 18 from the control signal 18 from passing to the channel 6 telecontrol. After the telecontrol command driver has sent a command to channels 5 and 7 to measure the noise immunity of the controlled regenerator 8, the loss of the control signal from the generator 18 in channel 6 the telecontrol is fixed by the receiver 3 of the control signal and perceived by the operator as an indication that the intervening station 4, the automatic interruption of the interfering effect took place. Then, following a command from the driver 2, the remote control commands are performed or a new measurement of the noise immunity is performed. The controlled regenerator 8, or the control of the next regenerator 8. If the control is performed again at this intermediate station 4, then in both cases it is necessary to start the initial installation of the former 23 timeslots and reset the counter bits 25 mistakes. If the control is carried out at the next intermediate station: 4, it is sufficient that the device is depleted at the previous intermediate station 4.

Claims (1)

Invention Formula Telecontrol device for regenerators of the communication line by aut. St., No. 1283986, characterized in that, in order to ensure telecontrol accuracy by reducing the time interfering with the regenerators when measuring the noise margin of the communication link regenerators, the second additional key block sequentially inserted at each intermediate station, driver time intervals, a front selector and an error counter, with m inputs of the second additional key block connecting with the corresponding outputs of the first additional block keys, the first signal input is connected to the output of the pilot signal generator, the second signal input is connected to the output of the OR element, NOT, the setup input of the time interval generator is connected to the output of the edge selector, the counter input of the error counter is connected to the second output of the second additional key block, and - with the third input of the trigger and the fourth input of the OR element, the second input of the front selector is connected to the first output of the shift register. 2: Fig.z