SU1499343A1 - Multichannel arrangement for connecting users to common trunk - Google Patents

Abstract

The invention relates to computing and can be used to organize the access of several subscribers to a common highway. The purpose of the invention is the expansion of the field of application due to the dynamic assignment of channel priorities. The device contains a one-shot, an element of OR and K channels (K is the number of subscribers), each of which contains a trigger, a counter, two one-channel, three delay elements, five AND elements, six OR elements, two NOT elements. 1 il.

Description

The invention relates to the field of computer technology and can be used to organize access from several subscribers to a common highway.

The purpose of the invention is to expand the field of application of the device. - due to the dynamic prioritization of the channel

The drawing shows the functional diagram of the device.

The device contains M channels 1, one-shot 2, the element OR 3 and in each of the K channels 1 - the trigger 4, the elements AND 5-9, the elements 10-12 delay, the elements OR 13 - 18, the counter 19, the element OR-NOT 20, one-shot 21, elements HE 23 and 24, a channel request input 25 for a short exchange, a channel request input 26 for a long exchange, P control inputs 27; poll signal polling control; the output of the acknowledgment of the seizure of the trunk channel 28, the inputs 29-31 of the device, the outputs 32-34 of the device. The device works as follows.

in the way

In the initial state, the trigger 4 of all channels is at zero, the contents of counter 19 is zero. When the device is turned on, a pulse appears at the output of the single-vibrator 2, which, as a polling signal, flows through the element OR 3 to the second input 30 of the device of the first channel, starting to poll channels.

In the operation of the device at the choice of a channel, in the absence of a request signal, the trigger 4 is set to one does not 4th. And the interrogation signal passes from the second input 30 of the device through delay element 10, element 5, not channel selection, or, respectively, in the opposite direction. nii - from the output of the element OR 15 through the element 12 of the delay, the element And 7, do not select the channel. With a signal

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channel request - low potential at the channel request inputs 25 and 26 for a short or long exchange, respectively, when there is a low potential at the input 31 of the device, a low potential appears at the output of the AND 6 element and a polling pulse appearing at the output of the element OR 13 from the input 30 of the device or from the output of the element OR 15, the trigger 4 is set to one, a high potential appears at the output 28 of the channel confirmation — the subscriber is capturing

 tentsiap at the output of element 20 and there is no high potential at the input 31 of the device — the output of the element OR 16 is kept low and the interrogation signal passes from the output of the element OR 17 through the element AND 8, the element OR 15 at the output 32 of the device When the contents of the counter become zero, a high potential appears at the output of the element OR-NOT 20, at the output of the element OR 16 and the polling pulse from the output of the element OR 17 passes through the element AND 9,

the main line is dwindling, the impulse of the survey is not 15 passing to the next channel, skidding

It passes neither through the element AND 5, nor respectively through the element AND 7 — the interrogation of the channels is terminated. When the request signal is removed, a high potential appears at the output of the element 6, the trigger 4 is set to zero, a low potential appears at the output 28 of the confirmation of the channel request, on the front of which the one-vibrator 21 produces a pulse that passes through the element OR 17, resumed channel survey

thirty

35

40

In the operation of the polling device, the polling signal of all subscribers is divided into main channels by the frequency of the seizure of the trunk, and subscribers who frequently exchange in the system are connected to channels that have lower sequence numbers. On the P inputs 27, the polling signal control signals of all channels in the group j except the last are set to the subscriber code 00 ... 01, where 1 is in the low-order bit, and for the last channel of the group, the code determining the polling frequency of the next group, while the larger the value of the code assigned to the last channel of the group, the less often the polling signal will flow to this group, since it will more often resume the opros from the output of the previous group, starting from the first channel. When the device is turned on, the one-shot 22 produces an impulse that zeroes, the contents of the counter 19 and the delayed delay element 11 pulse the counter 59 to record the value from the P inputs 27 of the polling signals. Each polling signal appearing at the input 30 of the channel device, the contents of the counter 19 of this channel is reduced by one. If the contents of the counter 19 is not zero - 45

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at the same time, in the channel counter 19, there is a value with P inputs 27 for controlling the interrogation signal.

The operation of the device for interrupting a long exchange by a subscriber making a request for a short exchange.

When a request signal arrives at the channel request input 25 for a short exchange via the NOT element 23, a high potential is fed to the input 31 and the output 34 of the channel device, from which the exchange of the subscriber of any channel making the long exchange is interrupted, since the second input of the OR element 14 all channels appears high potential. Since a high potential appears at the second input of the OR element of all 16 channels, regardless of the contents of the counter of 19 channels, a polling pulse polls all channels and the channel whose subscriber requires a short exchange captures the trunk.

Claims (1)

Invention Formula A multichannel device for connecting subscribers to a common line containing a one-shot, element OR and K channels (K is the number of subscribers), each of which contains the first and second delay elements, a trigger, a counter, the first and second one-vibrators, and the first to fourth elements And, the element OR NOT, the first and second elements IL, the first and second elements are NOT, and the output of the solid vibrator is connected to the first input IPI element, the output of which is connected to the input of the first delay element of the first channel, in each channel the output of the first delay element is connected to the first input of the first ; element And, the second input of which is connected to the inverse output of the trigger, the direct output of which is connected to the output of the device's channel seizure confirmation and to the input of the first single-oscillator, the output of which is connected to the first input of the first OR element, the second input of which is connected to the output of the first element And, the outputs of the counter are connected to the inputs of the OR-NOT element, the output of the first element OR is connected to the first input of the second element AND, characterized in that, in order to expand the field of application by dynamically specifying according to the channel priorities, each channel additionally contains a third delay element, the fifth element AND, the third to sixth elements OR, and in each channel the output of the SH-ST element is NOT connected to the first input of the second OR element, the output of which is connected to the first input of the third AND element and the input of the first element is NOT, the output of which is connected to the second input of the second element AND, the output of which is connected to the first input of the third OR element, the output of which is connected to the input of the second delay element and the first input of the fourth OR element, output one of which is connected to the trigger sync input, the installation input of Oh which is connected to the output of the fourth element I, the first input of which is connected to the first input of the request for capturing the device’s trunk and the input of the second element NOT, the second input even jBBpToro of the element AND OR, the first input of which is connected to the second input , ten 499343 the request to capture the device’s mainline bus, the logic unit of the device is connected to the information input of the trigger and the input of the second one-oscillator, the output of which is connected to the first input of the sixth OR element, the output of which is connected to the input of the third delay element and whose information input is connected respectively to the output of the second delay element and the control input of the device channel interrogation signal, the output of the second delay element is connected to the first input: Of the element And, the second input of which is connected to the inverse output of the trigger, the output of the third element And The 20th Mth (, K-1) channel is connected to the second input of the sixth OR element, the Mth channel, the input of the first delay element, the second input of the fourth OR element, and the subtraction input of the counter (Mtl) -ro channel, the output of the third AND element K-th channel is connected to the second inputs of the sixth and third elements OR of the K-th channel, the output of the fifth element AND from the second 30 on the K-th channel is connected / with the second input of the third element OR, respectively, from the first to (K-1) -th channel of the device, the output of the fifth AND element of the first channel is connected to 35 by the second input of the sixth OR element, the output of which is connected to the second input of the fourth OR element and the subtraction input of the counter unit of the first channel, the codes of the second NOT elements of all channels are combined through the OR installation and connected to the second inputs of the fifth and sixth OR elements of all channels. 40 / 5/27 28. J isisii e