SU1185347A1 - Device for simulating communication systems - Google Patents

Abstract

A DEVICE FOR MODELING COMMUNICATION SYSTEMS, containing a trigger for controlling the duration of operation, first and second pulse counters, a pulse generator, an AND element, a display unit and a group of service units, each of which contains an OR element, a group of AND elements in series and delayed elements connected in series random number sensor, register and decoder, sequentially connected trigger, AND element and pulse counter, with the first inputs of AND elements of the group being controlled house of the service unit, are combined and connected by the first input of the trigger of the service unit, the installation input of the pulse counter, the information input of the service unit is another input of the AND unit of the service unit, the decoder outputs are connected respectively to rods of the AND elements, the outputs of the delay elements of the group are connected to the corresponding inputs of the element OR, the output of which is the first output of the service unit and is connected to the second input of the trigger, the service unit, the second output of the service unit The output of the pulse counter, the first outputs of all the service units of the group and the output of the second pulse counter are connected to the corresponding inputs of the display unit, the output of the pulse generator is connected to the first input of the device element AND, the second input of which is connected to the output triggered S And the device C / is connected to the information input of the second pulse counter and the informational inputs of all the service units of the group, the first input of the slave duration control trigger You are the control input of the device, characterized in that, in order to expand the functionality by (X simulate the operation mode of the star communication system with handshaking. commands, it additionally contains an OR element, the inputs of which are connected respectively to the second outputs of the service units the group, the output of the OR element is connected to the input of the first pulse counter, the output of which is connected to the second input of the operating time control trigger, and the control inputs of all service units of the group of are connected and connected to the first input of the control trigger for the duration of the operation.

Description

The invention relates to computing and communication technology and can be used to simulate data acquisition, transmission and processing systems, as well as to simulate automated control systems. The purpose of the invention is the expansion of functional capabilities by simulating the mode of operation of a stellar communication system with command acknowledgment. / FIG. 1 shows a block diagram of a device for modeling a communication system; in fig. 2 is a block diagram of a modeling block. The device contains the first pulse counter 1, the output of which is connected to the second input of the operating time trigger 2, the second pulse counter 3, the output of which is connected to the input of the display unit 4, as well as the pulse generator 5, the output of which is connected to the input of the And 6 element. also a group of service units 7, an element OR 8. In this case, the inputs of the units 7, the first input of the trigger 2 and the installation input of the second pulse counter 3 are combined and are the installation input of the device. The output of the trigger 2 is connected from.; From the inputs of the element 6, the output of which is connected to the counting input of the second counter 3 pulse and the information inputs of the service units 7, the first outputs of which are connected to the corresponding inputs of the display unit 4, and the second outputs connected to the corresponding inputs element OR 8, the output of which is connected to the input of the first counter 1 pulses. The simulation unit 7 contains the element OR 9, K of serially connected elements AND 10 and delay elements 11, serially connected sensor 12 of random numbers, register 13 and decoder 14, as well as sequentially connected trigger 15, element AND 16 and pulse counter 17. The device for modeling the communication system operates as follows: From the installation input of the device, a pulse arrives that wraps the second counter 3 pulses, sets the trigger 2 to state 1, and goes to the installation inputs of all the service units 7. 1 72 Pulse generator 5 generates pulses of the reference frequency, which enter the input of element 6. At the output of element 6, pulses arrive at the input of the second counter of 3 pulses and at (1) the input inputs of blocks 7. Service blocks 7 are designed to simulate random transmission times control commands from the central station (CA) to the corresponding receiving stations (MS) and receiving from them the corresponding receipts. The pulses from the second outputs of the modeling units 7 at random times arrive at the corresponding inputs of the element OR 8. From the output of the element OR 8, the pulses arrive at the input of the first pulse counter 1, which is designed to determine the time when the last receipt arrives at the CA. When the last pulse arrives at the input of counter 1, the contents of the counter are nullified, and at its overflow output a signal arrives at the input of trigger 2, which is set to the zero state, prohibiting the arrival of reference frequency pulses through AND 6. in the following way. The control pulse arrives at the first inputs of the And 10 elements, zeroes the pulse counter 17, and sets the trigger 15 to one state. In this case, the passage of the pulses of the reference frequency, received through the information input of the block 7, to the input of the pulse counter 17 is allowed. The random number sensor 12 generates a sequence of random codes input to the register 13, which is intended for the operational storage of codes. From the output of register 13, the code arrives at the input of the decoder 14. In accordance with the received code, a control signal appears at one of the outputs of the decoder 14, allowing the control pulse to pass through one of the K elements And 10. The control pulse from the output of the element And 10 enters the input of the corresponding element 11 of the delay. All delay elements 11 provide different delay times.

which allows simulating a random command transmission time from the CA to the MS and obtaining the corresponding receipts. From the output of the delay element 11, the control pulse passes through the OR element 9 and is fed to the second output of the block 7 to the second input of the trigger 15. In this case, the trigger 15 is set to zero state, prohibiting the passage of reference frequency pulses through elements 16.

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The code from the output of the counter 17. pulses through the first output of block 7 is fed to the corresponding input of block 4 of the display.

Thus, on display unit 4, the total execution time of the functional task is indicated.

(the contents of the counter 3 pulses), Q and also the time of receipt from it

receipts (the contents of the counters 17 pulses).

FIG. one

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Claims (1)

DEVICE FOR MODELING COMMUNICATION SYSTEMS, containing a trigger for controlling the duration of operation, the first and second pulse counters, a pulse generator, an element And, an indication unit and a group of service units, each of which contains an OR element, a group of series-connected elements And 'and delay elements, a random number sensor connected in series, a register and a decoder, a trigger connected in series, an AND element and a pulse counter, the first inputs of elements AND groups, which are the control input of the service unit, are combined and connected by the first input of the trigger of the service unit, the installation input of the pulse counter, the information input of the service unit ia is another input of the AND element of the service unit, the decoder outputs are connected respectively to the inputs of the AND elements of the group, the outputs of the group delay elements are connected to the corresponding inputs of the OR element, the output of which is the first output of the service unit and connected to the second input of the trigger, the service unit, the second output of the unit of service is the output of the pulse counter, the first outputs of all the service units of the group and the output of the second pulse counter are connected to the corresponding inputs of the display unit, output g the pulse generator is connected to the first input of the AND element of the device, the second input of which is connected to the output of the duration control trigger, the output of the And element of the device is connected to the information input of the second pulse counter and information inputs of all the service units of the group, the first input of the duration of the trigger control is the control input devices, characterized in that, in order to expand functionality by modeling the operation mode of the stellar communication system with acknowledgment · Commands, it additionally contains an OR element, the inputs of which are connected respectively to the second outputs of the group service units, the output of the OR element is connected to the input of the first pulse counter, the output of which is connected to the second input of the duration control trigger, and the control inputs of all group service units are combined and connected to the first input of the duration control trigger. ς> υ ... "118534 / to be used for the model of collection, transmission and delighted systems, as well as for model-automated systems