SU919102A1 - Device for monitoring communication channel - Google Patents

Description

(54) DEVICE FOR THE CONTROL OF A COMMUNICATION CHANNEL

I

The invention relates to radio engineering and can be used to automatically predict the quality estimate of a discrete communication channel.

A device for controlling a communication channel is known, comprising a serially connected error detection unit, a current evaluation unit, a predicted evaluation unit, the output of which is connected to the input of the delay element and the input of the display unit, and the serially connected error counter, the control unit and the measuring interval driver, the output of which is connected to another input of the current evaluation unit and to another input of the predicted evaluation unit, and the other input of the measurement interval generator is connected to the output of the error counter iboc 1,

However, the device has low accuracy.

The purpose of the invention is to improve the accuracy,

To achieve the goal, the device for controlling the communication channel, containing the serially connected error detection unit, the current evaluation unit, the predicted evaluation unit, the output of which is connected to the input of the delay element and the input of the display unit, and the serially connected error counter, the control unit and the driver measuring intervals

lO output of which is connected to another input of the current evaluation unit and to another input of the predicted evaluation unit, and the other input of the measurement interval generator is connected to the output of the error counter, a switch, an addition element modulo two, the first and second inverters and the AND element are inputted, this switch outputs are connected to the inputs of the add

20 modulo two, the first and second inverters and the element To which the output of the first and the output of the second inverters are connected, and the output of the element And 391 are connected to another input of the addition element modulo two and the other input of the error counter, the inputs of the switch are connected to the output of the element delays and with the output of the current evaluation unit. The drawing shows a structural electrical circuit of the device. The device for monitoring the communication channel contains an error detection unit 1, a current evaluation unit 2, a predictive evaluation unit 3, an indication unit 4, a switch 5, a modulo two element 6, two inverters 7 and 8, an And 9 element, a counter 10 control unit 11, the imaging unit 12, the delay element 13, the device operates as follows. Signals Error from block 1 errors are received at the input of block 2 of the current assessment, in which the measuring interval; t, given by the measuring data generator 12, determines the current value of the error ratio K and compares it with its threshold value Knopj, which is divided by the Normal and Avar values of the current channel quality estimate. B, the moment of termination of the interval tj from the output of block 2 of the current estimate the signal of the current estimate Z | in the form of a single (Avari) or zero (Norm) potential is given to block 3 of the predicted estimate and to the second input of the commutator 5. In block 3 of the predicted estimate based on an analysis of the trend of the current channel quality changes, a predictable estimate of its quality Z is generated; lead. The predicted Avariya estimate in the form of a null Norma or a unit or potential, respectively, according to a signal from the generator 12 measurement intervals enters the display unit A and simultaneously to the input of the delay element 13. From the output of the delay element, the evaluation signal Zj + i is fed to the first input of switch 5. Depending on the option of interconnecting its inputs and outputs in switch 5, the proposed device allows you to further implement any of the three functioning algorithms 1. When connected to switch 5, its first input from its third output and second input from the sixth output signal evaluation Zj-t-- | expected at the (i + 1) -M interval from the output of block 3 delayed by the duration of the measuring interval in the element 13 delays and inverted by the first inverter 7, is fed to the first input of the element And 9, the second input of which from the current evaluation unit 2 receives the current signal estimates of ZyH actually obtained in the (1 + 1) -th measurement interval. From the output of the element And 9, the forecast error signal in the form of a single potential will be read only at Z - Norm Zif Avari. Thus, this variant of switching in switch 5 ensures the fixation of only one type of forecast errors, namely, erroneous gaps in the channel emergency state. 2 о When the first input with the 5 output is connected in the switch 5, the prediction error signal from the AND 9 element to the 10 error counter input will be read only when the I 9 element AND 9 input signal of the 2 i + - signal (Alarm from the output of the delay element 13 and receipt to the second input of the inverted signal Zj The norm from the output of current evaluation unit 2. In this case, only the second type of prediction error is detected — an erroneous rejection of the communication channel. 3. When the switch 5 connects its first input with its first output and the second input with four the output of the prediction error signal will be read from the output of the element 6 modulo two for any c) inconsistency between the evaluation signals Zf and Z | at its inputs, i.e. With this switching option, all prediction errors are recorded in switch 5, regardless of their type. Thus, if the prediction coincides .c measured estimate. | the actual state of the channel from the output of the element And 9 or the element 6 addition modulo two reads the zero potential in the counter 10. If the prediction Zj4 does not match the actual estimate, the unit potential is read into the 10 error counter, which records each control error (prediction). When above 59

The scientific research institute, with the frequency of control errors of the set threshold value from the output of the error counter 10, the control unit 11 generates a signal that changes the duration of the measurement intervals in the driver 12. control in these particular conditions.

Thus, the technical and economic efficiency of the proposed device lies in the fact that, taking into account the unevenness of the loss of communication reliability, with control errors, the switchgear has a more informative differentiated assessment of control reliability corresponding to each type of error. The use of differentiated evaluation, which takes into account the most dangerous type of control errors under these conditions, will make it possible to more accurately determine the time and direction of the control parameters restructuring, reduce the duration of non-optimal impact of the switchgear on the radio link, reduce the number of (due to them) communication interruptions and ultimately, increase communication reliability.

Claims (1)

Invention Formula A device for monitoring a communication channel, comprising in series 26 the connected error detection unit, the current evaluation unit, the predicted evaluation unit, the output of which is connected to the input of the delay element and the input of the display unit, and the serially connected error counter, the control unit and the measurement interval driver, the output of which is connected to another input of the current evaluation unit and to another input of the prediction unit “) of the evaluation, and another input of the measurement interval generator is connected to the output of the error counter, which is distinguished by the fact that, in order to improve the accuracy, a switch, The addition modulo two element, the first and second inverters and the element And, while the switch outputs are connected to the inputs of the addition element modulo two, the first and second inverters and the element And, to which the first output and the output of the second inverter are connected, and the output element And connected to another input of the addition element modulo two and another input of the error counter, the inputs of the switch are connected to the output of the delay element and to the output of the current evaluation unit. Information sources. Roman tions into account during examination 1, USSR author's certificate, cl. H Ok L 11/08, 1975.