SU987861A1 - Device for selecting stationary radio station for connecting to dispatcher's communication line - Google Patents

Description

The invention relates to radio communications with mobile objects and can be used for automatic control of a radio wire communication system.

A device for selecting a fixed radio station for connection to a dispatching communication line is known, comprising a fixed radio station, the first output of which is connected to the first input of an electronic relay through the first level driver, and the second output is connected to the second input of an electronic relay through the unit control is connected to the input of the blocking signal generator and the output of the blocking signal receiver, connected to the dispatching communication line 11.

However, the known device is characterized by insufficient accuracy in the selection of a stationary radio station for connection to the dispatching communication line due to the low resolution of the electronic relay.

It is also known that a stationary radio station selection device for connecting to a dispatching communication line, comprising a series-connected radio station and a shaper, a comparator, the first input of which is connected to a reference voltage source, the second output of the fixed radio station being connected to the dispatching communication line, which is connected to the output of the blocking signal generator and to the signal input of the blocking signal receiver, the first control output of which is connected to the second input of the coincidence unit, the third input of which is connected to the preemptive output of the first

15 pulse generator, the blocking and triggering outputs of which are connected respectively to the first control input of the receiver of the blocking signal and the first input of the generator of the blocking signal 2.

However, the known device has insufficient accuracy in the selection of a fixed radio station for connection to a dispatching communication line in

25 due to the fact that the formed time interval from the beginning of the call from the mobile radio station to the blocking signal for the different stationary radio stations in the dispatching line does not correspond to the actual ratios of the voltage levels of the received signals. The purpose of the invention is to improve the selection of a fixed radio station for connection to a dispatching communication line. For this, a stationary radio station selector for connecting to a dispatching communication line, containing a series-connected radio station and a shaper, a comparator whose first input is connected to a source of reference voltage, the second output of the stationary radio station being connected via a matching unit to the control room connection, which is connected to the output of the blocking signal generator and to the signal input of the blocking signal receiver, the first control output of which is connected to the second The third input of the coincidence unit, the third input of which is connected to the control output of the first pulse shaper, whose blocking and triggering output is connected respectively to the first control input of the blocking signal receiver and the first input of the blocking signal generator, is introduced two pulse generators, a edge separator, a second pulse shaper , a controlled integrator connected between the output of the level generator and the second input of the comparator, as well as series-connected first generator in belt interval, the first element And reversible counter and decoder, serially connected to the second shaper time interval, the second element And and the pulse converter, the second input and output of which are connected respectively to the first and second inputs of the reversible counter, while the comparator output is connected to the control the input of the controlled integrator and to the first input of the first shaper of the time interval, the output of which is connected to the first input of the second shaper of pulses, the outputs of which are under COOs are connected to the second lock signal generator and the second control input of the lock signal receiver, the decoder output is connected to the input of the first pulse generator and the first input is the second time switch, the third stationary output is connected to the front-end selector unit, the first output which is connected to the second input of the second pulse maker and to the second input of the second shaper of the time interval, and the second output to the other control input of the control The second integrator and the output of the blocking signal are connected to the third input of the second time interval generator, and the outputs of the first and second pulse generators are connected respectively to the second inputs of the first and second elements I. And the pulse converter contains two registers, the outputs of which are connected respectively to the bit inputs of the comparison unit, the output of which is connected to the first input of the first register, while the second input d of the first register, second register input and a comparison output is block are respectively input and output transducer pulses. The drawing shows a structural electrical circuit of the device. The stationary station selection device contains a stationary radio station 1, a shaper 2, a controlled integrator 3, a comparator 4, the first shaper 5 of the time interval, the first element And b, a reversible counter 7, a decoder 8, the first shaper of 9 pulses, a generator 10 of the block signal, ki , receiver 11 of blocking signal, block 12 of coincidence, second pulse shaper 13, edge selection block 14, second time interval shaper 15, second AND 16 element, pulse converter 17, first imp generator 18 sov, 1.9 vtoroygenerator pulses. Moreover, the edge selection block 14 comprises a leading edge selector 20 and a trailing edge selector 21, and the pulse converter 17 comprises a first register 22, a second register 23, and a comparison unit 24. The device works as follows. The signal from the first output of the stationary radio station 1 is fed to the input of the level 2 generator, the output of which generates a voltage level of which is directly proportional to the input level of the stationary radio station 1. When receiving a call from the mobile radio station from the different radio station 1, the third stationary radio station 1 responded. The signal corresponding to the received call that goes to the inputs of the edge extraction block 14. A pulse from the output of the front 20 selector starts the first shaper 5 of the time interval and the controlled integrator 3, the input of which receives the voltage from the output of the shaper 2 level. Signal

from the output of the controlled integrator 3 is fed to the second input of the comparator 4, to the first input of which the reference voltage is applied. When the output voltage of the controlled integrator 3 reaches the level of the reference voltage, the comparator 4 generates a pulse, which returns to its initial state integrable 3 and the first shaper 5 time interval. The relationship between the voltage level at the output of the shaper 2 level and the duration of the formed time interval at the output of the first shaper 5 time interval is inversely proportional to the linear or logarithmic law, i.e. a higher voltage level corresponds to a smaller time interval and vice versa. .

During the formed time interval, pulses from the output of the first generator 18 pulses through the first element Ib, to the first input of which the resolving potential is fed from the output of the first generator 5 of the time interval, are fed to the first input of the reversible counter 7 and the second input of the pulse converter 17.

At the end of the formed time interval, the second pulse generator 13 is started, which turns on the blocking signal generator 10 and blocks the blocking signal receiver 11. The blocking signal sent to the control room is detected by the blocking signal receivers 11 of other stationary radio stations that have received the call but have not converted the voltage level to the time interval yet. At each of these stationary stations, the signal from the second control output of the receiver 11 of the blocking signal goes to the third input of the second shaper 15, thus preventing further reading of the pulses from the reversible counter 7 and connecting the second output of the radio station 1 to the control room.

At the end of the call, pulses recorded in the counter are read by a sequence of pulses arriving at the second input of the reversing counter 7. For this, a pulse from the output of the trailing edge selector 21 returns the second pulse shaper 13 to the initial state, which turns off the blocking signal generator 10 and starts the second shaper 15 time interval. When the pulses from the output of the second generator 19 pulses through the second element And 16 to the first input of which the resolving potential from the output of the second generator 15 of the time interval is fed, is fed to the input of the first register 22. The number of pulses recorded in the second register 23,

corresponds to the number of pulses fixed in the reversible counter 7, since their input: u are connected in parallel. When the number of pulses in the first register 22 coincides, the number of pulses in the second register 23 compare unit 24 generates a pulse that arrives at the second input of the first register 22, sets it to its initial state, and the second

reversible counter input 7, reducing the number of pulses fixed in it. When receiving a call from the spacing signal zone, the signal at the input of one stationary radio station 1 will be larger than at the input of others, therefore, a smaller number of pulses will be written to its reversible counter 7 and read more quickly. When the reversing counter 7 is zeroed, a pulse appears at the output of the decoder 8, which starts the first pulse generator 9, which turns on the lock signal generator 10, locks the lock signal receiver 11 and connects the output

fixed radio station 1 to the dispatching line of communication.

A blocking signal sent to the control line is fixed by blocking signal receivers 11

The other stationary radio stations 1 that received the call made the conversion of the voltage level to the time interval, but have not yet fixed resetting the reversing counter 7. At each of these stationary radio stations, the signal from the second control output of the receiver 11 of the blocking signal goes to the third input of the second shaper

15 a time interval, as a result of which the pulses from the reversible counter 7 are prevented from being read and the second output of the fixed radio station 1 connected to the dispatcher communication line.

When receiving a call from a mobile radio station from the equal-signal zone, the input signals of the stationary radio stations 1 are the same or close in level. For

excluding the simultaneous connection of several stationary radio stations 1 to the dispatching communication line, the first pulse shaper 9 have for three neighboring stationary

radio stations of different durations of sending a blocking signal.

At the end of the pulse at the trigger output of the first shaper 9 pulses, the generator 10 is turned off.

lock signal, and at the end

the pulse at the blocking output of the first driver 9 pulses is unlocked from the receiver. 11 of the blocking signal. The second output of the stationary radio station 1 is connected to the dispatching communication line by a pulse, which from the control output of the first pulse shaper arrives at the third input of the coincidence unit 12, and in the absence of a blocking signal in the dispatching communication line, i.e. the presence of an enable signal at the second input of the block 12; Thus, only the stationary radio station 1 out of the number of those who sent a call that has been assigned the longest time to send a blocking signal will be connected to the dispatching line.

After the end of negotiations on the control line, a release signal is sent, which brings all the units of the device back to their original state.

The technical and economic efficiency of the invention is to improve the quality indicators of a radio conduction communication system with mobile objects by increasing the accuracy of selecting one fixed radio station for connecting it to the dispatching communication line when sending a call from a mobile radio station.

Claims (2)

1. A stationary radio station selection device for connection to a dispatching communication line, comprising a series-connected fixed radio station and a shaper, a comparator, the first input of which is connected to a voltage source, the second output of the fixed radio station being connected to the dispatching communication line, which is connected to the output of the blocking signal generator and to the signal input of the blocking signal receiver, the first control output of which is connected to the second input a coincidence unit, the third input of which is connected to the control output of the first pulse shaper, which blocks and triggers the outputs of which are connected respectively to the first control input of the lock signal receiver and the first input of the lock signal generator, characterized in that, to improve the selection accuracy, Two pulse generators, a front edge isolation unit, a second pulse generator, a controlled integrator connected between the output of the level generator and the second input of the comparator, and t kzhe series-connected first driver slot 5, the first AND gate, down counter and decoder, successively connected to the second driver temporarily in. the second element and the converter of pulses, the second input and output of which are connected respectively to the first and second inputs of the reversible counter, while the input of the comparator is connected to the control input of the controlled integrator, and to the first input of the first time interval generator The output of which is connected to the first input of the second pulse driver, the outputs of which are connected respectively to the second input of the blocking signal generator and the second control input of the receiver of the blocking signal, The output of the decoder is connected to the input of the first pulse generator and the first input of the second time interval generator, the third output of the stationary radio station is connected to the inputs of the edge selector unit, the first output of which is connected to the second input of the second pulse conditioner and the second input of the second time interval generator, and the second exit - to 5 to another control input of the controlled integrator and the second input of the first time interval generator, the second control output of the blocking signal receiver is connected to the third input of the second time interval generator, and the outputs of the first and second pulse generators are connected respectively to the second inputs of the first and second elements AND. 5 2. Device POP.1, characterized in that the pulse converter contains two registers, the outputs of which are connected respectively to the bit inputs of the block 0 comparison, the output of which is connected to the first input of the first register, while the second input of the first register, the input of the second register and the output of the comparison unit are respectively the inputs and output of the pulse converter. Sources of information taken into account in the examination 1.Ustinsky A.A. Train radio is a selective call communication. M., Transzheldorizdat, 1957, p.23-25, 2. Authors certificate of the USSR 372743, cl. H 04 Q 7/04, 1971 (prototype). I s il S n) 7 / H e rtjn . e " Jh / r S $ .