The telecontrol device for transmission of digital information

 

(57) Abstract:

The device relates to communication technology, in particular to systems of discrete information transmission on metallic and fiber-optic cables, microwave paths. The technical result of the invention is the simplification of the device, improving the accuracy of telecontrol and expansion applications. The result is achieved that the device contains at each terminal station, the source of the information signal, the pseudo-random sequence generator, the first and second switches, the control unit, the first analyzer pseudo-random sequence, the memory element at each intermediate station - regenerators forward and reverse directions and, accordingly, the artificial line, the memory element, the key entered: at the end of the third switch, the second and third analyzers pseudo-random sequence, the error indicator, and the intermediate terminal of the fourth switch. The introduction of the third and fourth switches allows you to create the generator and analyzer pseudo-random sequence with a dial-up structure, the signals telecontrol presents a pseudo-random posledovatel, a separate transmission channel in the diagnostic mode is not needed. Receiver commands telecontrol and quality analyzer transmission mode telecontrol performed on the same analyzer pseudo-random sequence. Generator test signal is simultaneously the driver commands telecontrol and made in the form of a pseudorandom sequence generator. The telecontrol device works in all systems transmit digital information regardless linear code transmission. 7 Il.

The alleged invention relates to communication technology and can be used to build systems of discrete information transmission as metal cables, and microwave paths and fiber-optic cables (FOC).

Known telecontrol device for detecting defective regeneration section of transmission lines for digital information.with. USSR N 1117845, MKI H 04 B 3/46 published 7.10.84, and and. C. the USSR N 1185620, MKI H 04 B 3/46 published 15.10.85 year).

Included in these copyright certificates of the device allow to find the fault in the transmission of digital information, but have significant drawbacks: for telecontrol is Rusovce remote power. In addition, the detection time of a faulty regenerator section is too large, so as to determine the health of a tract you must alternately, starting with the first maintenance-free regeneration of the item, inspection of all regeneration stations tract.

Other analogues of the proposed invention can be telecontrol device, described in and. C. the USSR N 951731, MKI H 04 3/14 published 15.08.82,, and and. C. the USSR N 1035812, MKI H 04 B 3/46 published 15.08.83, the disadvantages of the first device is the complexity of the phasing of the transmitted and received test signals, so as to fail the test signal leads the clock skew of the stresses that come on the unit of comparison. In addition, the accuracy of such a device small in the presence of jitter of the received signal in the range specified by the relevant CCITT recommendations. The accuracy of determining the reliability of the second device is also small. So the extinction of one information symbol and the appearance of another false on the selected time interval will not result in the detection counter error, even though there was two of them.

The closest in technical essence to th is, The KI H 04 B 3/46 published 07.09.83, containing at each terminal station, the source of the information signal, the first switch, the pseudo-random sequence generator (gpsa), the control unit, the managed code Converter, decoder fixed combination, a divider with a variable division ratio, the analyzer violations of bipolarity, the analyzer pseudo-random sequence (CRR), take the second switch, the counter, the first and second memory elements, and at each intermediate station regenerator straight direction, the regenerator reverse direction, the artificial line, the memory element key, the detector disorders bipolar and linear analyzer violations of bipolarity, at each terminal station, the source of the information signal and gpsa their outputs connected to information inputs of the first switch, the output of which is connected to the first input of the control of the code Converter, the output of which is connected with the linear path, the detector violations of bipolarity and the CSCA, the inputs are combined and connected to a linear path, the output from CSCA connected to the first input of the second switch, the second input and the output of which is connected respectively with the output of the m inputs of the control unit, utility inputs of the first and second switches connected to the corresponding outputs of the control unit, and the clock input of the counter and the CSCA filed heartbeats in addition, the output of the first switch connected in series through the decoder fixed combination and the divider with a variable division ratio setting input of which is connected to respective outputs of the control unit connected to the second input of the control of the Converter code, set input connected to the corresponding input of the control unit, and the first, second and third inputs of the analyzer violations of bipolarity connected respectively to the output and the inputs of the detector violations of bipolarity, and the first, second, third, the fourth and fifth outputs of the analyzer violations of bipolarity are connected respectively through the first and second memory elements with the third and fourth inputs of the control unit and the fifth input of the control unit directly, the respective outputs of which are connected with the installation inputs analyzer violations of bipolarity and counter, the input device is the input source of the information signal, and the output - input linear tract of terminal stations, each PR is to the inputs of the regenerator reverse direction, the memory element, the output of which is connected through the key to a switching input of the artificial line and to another input of the regenerator reverse direction, the inputs of the detector violations of bipolarity are connected to the outputs of the regenerator straight direction and with the first and second inputs of the linear analyzer violations of bipolarity, the third input and the outputs of which are connected respectively with chronium output of the regenerator straight direction and to the inputs of the memory element, and the fourth input line analyzer violations of bipolarity is connected to the output of the detector violations of bipolarity, and the regenerators forward and reverse direction are connected with a linear path.

A disadvantage of this device is limited scope, as his work is associated with a specific linear code (quazatron), the structure of which is violated by a law.

Moreover, the accuracy of determining of the faulty area regeneration is low due to different conditions of signal transmission PCM in quazatron code during operation of the transmission system and telecontrol with quazatron code that contains some breaking changes. The device works with the Converter of generator signal PCM, thus the frequency response of the offset becomes suboptimal and interference regenerator is deteriorating. So it terms of recovery of the signal regenerator in the working mode, telecontrol and various suboptimal in diagnostic mode, which may lead to the identification of defective regeneration section, which works fine with the working signal. The last remark is especially important if no measures are taken the balancing of such a modified code. In addition to the disadvantages described device can be attributed to the complexity.

The basis of the invention is the task in the telecontrol device for transmission of digital information by introducing new units and interconnections in terminal and intermediate stations at simplification of the device to improve the accuracy of telecontrol and the opportunity to use the device in various transmission systems regardless of the underlying linear code, resulting in expanding the scope of its application.

The problem is solved in that in the telecontrol device for transmission of digital information containing in each terminal station, the source of the information signal, gpsa, the first and second commutator direction, artificial line, the memory element, the key, and the terminal station outputs of the source information signal and gpsa connected respectively to the first and second information inputs of the first switch, the output of which is connected with the linear path, the first input of the first of the CSCA is connected to the output of the linear path, the output of memory element connected to the first input of the control unit, the first output of which is connected to the fourth input of the first switch, the input device the input source of the information signal, and the output - input linear tract of the target station, and at the intermediate station, the first output of the regenerator straight direction through the first entrance of the artificial line connected to the first input of the regenerator reverse direction, the output of the memory element via a dongle connected to a switching input of the regenerator reverse direction and the second input of the artificial line, while the regenerator straight direction input and the first output, and a regenerator reverse direction of the second input and output sequentially enabled in a linear path connecting terminal and intermediate stations, according to the invention, in the terminal station introduced: a third switch, the second from CSCA and indicator oshibok first input connected to the output of the linear tract and to the third input of the first switch, and a second input to the output of the third switch, the second output from CSCA connected to the memory element, the first and second outputs of the second switch respectively connected to the input of the gpsa and the second input of the first of the CSCA, the output of which is connected to the input of the error indicator, the third output of the second switch is connected to the second input of the control unit, the second output of which is connected to the fifth input of the first switch, at the intermediate station to the second output of the regenerator straight direction and the fourth switch are connected respectively to the information and set inputs of the third from CSCA, the output of which is connected to the input of the memory element.

Simplification of the device telecontrol compared with the prototype is achieved using the introduced blocks of the third and fourth switches that set the "length" of registers gpsa and the CSCA, the device command to the organization plume gpsa is simultaneously the source of the information signal in the diagnostic mode, and the device receiving the command to implement loopback test station and the reception device and evaluation of the transmission quality on Slaveevo the plot also performed on the same device the nation in the proposed device is thus not needed.

This implementation of telecontrol device for transmission of digital information requires, in addition, a single channel or circuit for sending receipts from unattended stations.

Increase the accuracy of telecontrol in the proposed device is provided by the introduction of the gpsa and the CSCA up with a structure that allows you to work with pseudo-random sequences of different lengths, the structure of the signal is not changed, the frequency response range regenerator optimal, interference regenerator stable. Conditions recovery signal regenerator in the working mode and telecontrol (diagnostics) are the same.

The proposed device telecontrol can work in any transmission system, which uses a linear not only quasiturbine codes, i.e., expands the scope of its application.

The invention is illustrated by drawings, where:

in Fig.1 shows a functional diagram of the device;

in Fig. 2 is a functional diagram of the inclusion of the third and fourth switches;

in Fig.3 is a functional circuit of the second switch;

in Fig.4 is a block diagram of the control unit;

in Fig.5 - is - unctionally diagram of the error indicator.

The telecontrol device for transmission of digital information contains at each terminal station 1: the source of the information signal 2, the pseudo-random sequence generator 3, the first switch 4, the second switch 5, the control unit 6, the third switch 7, the memory element 9, the first and second analyzers pseudorandom sequence 8 and 10, respectively, the error indicator 11, and at each intermediate station 12 regenerators forward and reverse directions 13 and 19, respectively, the fourth switch 14, the third analyzer pseudorandom sequence 15, the memory element 16, the key 17, an artificial line 18, at the terminal station 1, the outputs of the source information signal 2 and gpsa 3 connected respectively to first and second inputs of the first switch 4, the output of which is connected with the linear path, the first input of the first analyzer pseudorandom sequence 8 is connected to the output of the linear path, the output of the memory element 9 is connected to the first input of the control unit 6, the first output of which is connected to the fourth input of the first switch 4, the second from CSCA 10 to its first input connected to the output of the linear path and is connected to the memory element 9, the first and second outputs of the second switch 5, respectively connected to the input of the gpsa 3 and the second input of the first from CSCA 8, the output of which is connected to the input of the error indicator 11, the third output of the second switch is connected to the second input of the control unit 6, the second output of which is connected to the fifth input of the first switch 4, at an intermediate station, the first output of the regenerator straight direction 13 through the first entrance of the artificial line 18 connected to the first input of the regenerator reverse direction 19, the output of memory element 16 through the key 17 is connected to a switching input of the regenerator reverse direction 19 and the second input of the artificial line 18, the second output of the regenerator straight direction 13 and the output of the fourth switch 14 connected respectively to the information and set inputs of the third from CSCA 15, the output of which is connected to the input of the memory element 16, with the regenerator forward 13 entrance and the first exit, and the regenerator reverse direction 19 of the second input and output sequentially enabled in a linear path connecting terminal and intermediate stations, input devices input source information signal 2 and the output - input linear tract of terminal stations is mi no matter which code line signal.

Gpsa 3 and the CSCA 8, 10, and 15 can be performed by known schemes based on shift registers similar to the corresponding devices in the prototype, and change the length of the pseudorandom sequence is connected with the second 5, the third 7 and 14 fourth switches a predetermined number of flip-flops in the registers. The third and fourth switches 7 and 14 are functionally the same and can be implemented, for example, by setting jumpers.

Functional diagram of the switches 7 and 14 shown in Fig.2. The second switch 5 may be implemented, for example, by using the push-button switch, and installation of the gpsa and the first from CSCA is in the same state that allows you to check past the train signal gpsa to the first recurrence of the CSCA. Enabling a second switch on his third outputs the control signal for the control unit 6.

Functional diagram of the second switch is shown in Fig.3. The control unit is implemented on the keys, switched depending on whether their control inputs of signals from the memory element or the second switch so that the outputs appear DC signals for the

The first switch may be implemented using a simple relay circuit, prolucuma depending on the availability of control signals one of the input signals on its output in a linear path.

Functional diagram of the first switch is shown in Fig.5. The memory element 16 may be implemented on RC - chain with the selected time constant. Functional diagram of the memory element shown in Fig.6.

The error indicator 11 may be implemented in the form of LEDs, the input of which receives pulses from the output from CSCA generated by one-shot for convenience of visual observations and socket connection error counter Functional block circuit error indicator is shown in Fig.7.

The device operates as follows. In the conditions of the working of the information signal from input terminal stations 1 through the source of the information signal 2, the first switch 4 transmits it to the line path. At each intermediate station 12 third from CSCA 15 check for recurrence of the output signal of the regenerator 13 and, not finding it a pseudo-random sequence of a given length, carries on through the memory element 16 and the key 17 train received signal Nanoha tract is supplied at the output station and parallel to the CSCA 10 to check for recurrence of the received signals. As in the intermediate station from CSCA 10, not finding "their" pseudo-random sequence, generates at its output pulses with a sufficiently high repetition rate to the memory element 9 via the control unit 6 has not created the conditions for closing the loop remote terminal station 1 via the first switch 4. Gpsa 3 and the error indicator 11 it does not work.

In diagnostic mode to check the whole line of the tract or any part of the regeneration switching of the second switch 5 to the terminal station 1 starts gpsa 3, and the control unit 6 operates the first switch 4, resulting in lieu of the information signal in a linear path signal from block 3. In addition, the second switch 5 sets the particular length of the pseudorandom sequence gpsa 3 and a corresponding state diagram of the first from CSCA 8. Now, if the loop-back signal will return to the terminal station 1, the CSCA 8 will check the quality of the scanned area on the violation patterns pseudo-random sequence, and the pulse errors are indicated by error indicator 11.

For the implementation of the train the N-th intermediate station 12, the second switch 5 sets the intermediate station 12, while in line at the N-th intermediate stations via the fourth switch 14 from CSCA 15 also has to work with a pseudo-random sequence of the same length. Then the unit 15 detects "their" pseudo-random sequence and the corresponding signal at its output through the memory element 16, the key 17, an artificial line 18 provides a circuit loop with the regenerator straight direction 13 through the regenerator reverse direction 19 in the direction of the terminal station 1, where, as described above, when a reception and analysis of the received signal blocks from CSCA 8 and error indicator 11. The signal from the subsequent (N+1)-th intermediate station is disconnected from the regenerator reverse direction.

For loop N+1-th intermediate station gpsa 3 and the CSCA 8 switched by the second switch 5 is in the operating mode with a pseudorandom sequence of a different length, and from CSCA 15 in the N+1-th intermediate station of the fourth switch 14 is set to work with this pseudo-random sequence.

To implement loopback remote terminal station 1 and the second switch 5 sets the gpsa 3 and the CSCA 8 on the authenticating station as well as checking the intermediate station, in operation RETIM switch 7 in the state, corresponding to the state of the gpsa 3 reviewers station, for example, when you train the entire tract work is carried out with a pseudorandom sequence of length 2^15-1 clock intervals recommended by the CCITT as a test signal for transmission rate of 2048 kbit/sec Adopted a remote terminal station 1, the second signal from CSCA 10 and the memory element 9 is treated the same as in the intermediate station 12 and, acting via the control unit 6 to the first switch 4, disables an information signal from the linear path and passes it back to relying station signal, organizing train. The quality of the received signal when it is also estimated to test the recurrence of the block 8 and the error display unit 11.

The telecontrol device for transmission of digital information containing in each terminal station, the source of the information signal, the pseudo-random sequence generator, the first and second switches, the control unit, the first analyzer pseudo-random sequence, the memory element at each intermediate station: regenerators forward and reverse directions, an artificial line, the memory element, the key, and the terminal station output is connected to first and second inputs of the first switch, the output of which is connected with the linear path, the first input of the first analyzer pseudo-random sequence is connected to the output of the linear path, the output of memory element connected to the first input of the control unit, the first output of which is connected to the fourth input of the first switch, and at the intermediate station, the first output of the regenerator straight direction through the first entrance of the artificial line connected to the first input of the regenerator reverse direction, the output of the memory element via a dongle connected to a switching input of the regenerator reverse direction and the second input of the artificial line, while the regenerator straight direction input and the first output, and the regenerator reverse direction of the second input and output sequentially enabled in a linear path connecting terminal and intermediate stations, characterized in that the terminal station entered the third switch, the second analyzer pseudo-random sequence and the error indicator, and in the intermediate station is the third analyzer pseudo-random sequence and the fourth switch, and the terminal station of the second analyzer pseudo-random sequence to its first input connected to the output of the d of the second analyzer pseudo-random sequence is connected to the memory element, the first and second outputs of the second switch respectively connected to the input of the pseudo-random sequence generator and the second input of the first analyzer pseudo-random sequence, the output of which is connected to the input of the error indicator, the third output of the second switch is connected to the second input of the control unit, the second output of which is connected to the fifth input of the first switch, the input device the input source of the information signal, and the output - input linear tract of the target station to the intermediate station to the second output of the regenerator forward voltage and the output of the fourth switch are connected respectively to the information and set inputs of the third analyzer pseudo-random sequence, the output of which is connected to the input of the memory element.

 

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