RU1797125C - Multichannel device for connection of subscribers to common trunk - Google Patents

Abstract

The invention relates to computer technology and can be used in multi-machine systems and networks to control access to a common trunk. The purpose of the invention is to increase productivity. The device comprises two counters, five triggers, a memory unit, two comparison circuits, seven AND elements, NOT, OR elements, an isolation element and a delay element. The essence of the invention is compelled by the fact that when the trunk is released and there is no requirement to display the configuration (composition of connected subscribers), the device goes into arbitration mode, and if available, into the configuration display mode, in which when the K-ro subscriber is connected in the Kth state the counter of the interval number on the common line is issued 1. and when it is not connected, O is displayed on the line. The status of the line is stored in the memory unit at the K-th address. In the arbitration mode, at the Kth state of the interval counter, the contents of the memory block cell are read at the Kth address; at its zero value, the interval dividing the access rights of the next subscriber in turn is reduced, and at a single value, it is fully counted. 1 ill. Serf. Yo

Description

V

about VI

The invention relates to computer technology and can be used in multi-machine systems and networks to control access to a common trunk.

A multi-channel device is known for connecting an information source to a common trunk, comprising two counters, two triggers, AND, OR, NOT and elements. decoupling elements, however, it does not allow displaying network configuration information and speeding up the access procedure based on this information.

The closest in technical essence to the claimed is a device

for connecting subscribers to a common trunk containing two counters, a first comparison circuit, two triggers, a delay element, an isolation element and a memory unit, while the input is connected to the counting input of the first counter connected by the transfer output to the input of the delay element and to the counting input the second counter connected by a code output to the address input of the memory unit and to the first input of the first comparison circuit, the first and second inputs of the device are connected to the first and second inputs of the first trigger connected by the output to the first th input of the second

y eat

a trigger connected by the output through the isolation element to the first common line and to the input of zeroing the first and second counters.

However, the known device does not allow dynamically displaying information about subscribers connected to the trunk and does not make it possible to increase productivity (reduce access time) by reducing the access interval of subscribers not connected to the trunk.

The purpose of the invention is to increase productivity by dynamically displaying the composition of subscribers connected to the trunk and reducing the interval for allowing access to subscribers not connected to the trunk.

This goal is achieved by the fact that in a multi-channel device for connecting subscribers to a common trunk, each channel contains two counters, a first comparison circuit, two triggers, a delay element, an isolation element and a memory unit, while the device channel clock input is connected to the counting input the first counter connected by the transfer output to the input of the delay element and to the counting input of the second counter connected by the code output to the address input of the memory unit and to the first input of the first comparison circuit, the first and second of polling, and resetting the channel of the device, connected to the single and zero inputs of the first trigger, connected by the output to the zero input of the second trigger, connected by the output through the isolation element to the first common line and to the inputs of zeroing the first and second counters of all channels of the device, three a trigger, seven AND elements, a second comparison circuit, an NOT element and an OR element, while the output of the first comparison circuit is connected to the first inputs of the first and second AND elements connected by the second inputs to the versatile and direct outputs of the third trigger, connected by a single input to the output of the third AND element, connected by the first input to the output of the second comparison circuit and to the first input of the fourth AND element, connected by the second input to the output of the fourth trigger, and by the third input to the output of the element AND the second input of the third AND element, connected by the third input through the second common line to the outputs of the second and fourth elements AND of all channels of the device and to the data input of the memory unit, the third input of the second AND element is connected to move the trigger connected to a single. input to the null input

the channel of the device and to the first input of the OR element, and the zero input to the inhibition of the operation of the channel of the device and to the second input of the OR element, connected by the output to the single input of the fourth trigger, connected by the zero input to the output of the fifth AND element and to the zero input of the third trigger connected direct exit to the second entrance

of the fifth AND element to the first input of the sixth AND element, connected by the second input to the transfer output of the first counter, and by the output to the recording input of the memory unit, connected by the output to the first input, seventh5. of the And element, connected by the second input to the inverse output of the third trigger, and by the output to the installation input of the first counter, the input of the element is NOT connected to the first common line, the first input is the second

0 of the comparison circuit is connected to the code output of the second counter, the second inputs of the first, first and second comparison circuits are connected to the first and second code inputs of the device channel. :

5 . The essence of the invention lies in the fact that when the trunk is released and there is no requirement to display the configuration (composition of connected subscribers), the device goes into arbitration mode

0 if there is a configuration display mode, in which when a K-ro subscriber is connected at the Kth counter state, the interval number on the common line is given T, and when it is not connected, the line is issued

5 0. The line status is stored in the memory unit at the K-th address. In the arbitration mode, at the Kth state of the interval counter, the contents of the memory block cell are read at the Kth address, with a zero value, the interval dividing the access rights of the next successive subscriber is reduced, and at a single value it is counted by the cavity. . The drawing shows a structural

5 circuit diagram of the device.

The device contains counters 1, 2, triggers .3-7, comparison circuits 8, 9, block of lamite 10, element NOT 11, elements AND 12-18, element OR 19, delay element 20,

0 isolation element (main amplifier) 21, signal output 22, control inputs 23-26, common lines 27, 28, clock input 29, code inputs for setting slot numbers 30, 31.

5. The operation of the device is as follows.

The request to capture the line is recorded in trigger 3 by a signal at input 23.

Trigger 7 records information about the subscriber connecting to the trunk, at 1

in trigger 7, the subscriber’s network operation is allowed, and when 0 is prohibited. The content of trigger 7 is changed when the subscriber is turned on or before it is turned off. Write 1 to trigger 7 is carried out at input 25, and 0 at input 26. According to the signals at inputs 25, 26 through element OR 19, 1 is written to trigger b, which fixes the request for the configuration display procedure.

When the common trunk is busy on line 27 1 from the trigger output of channel 4 of the subscriber who has captured the trunk. With 1 on line 27, a signal blocking their counter mode is received at the input of zeroing the counters 1, 2.

To release the trunk, the subscriber who captured it, applying a signal to input 24, writes 0 to trigger 3, while in trigger 4, 0 is written to the trigger at the P-input and the busy signal is removed from line 27. As a result, the signal from the zeroing input of the counters 1, 2 is taken and they switch to the counting mode, starting from the zero state. When the state of counter 2 is zero, at the output of comparison circuit 9, 1 is formed, which is transmitted to line 28 through element And 15 in the single state of trigger 6, i.e. upon request of a configuration mapping procedure. According to the signal from line 28 with an unoccupied trunk (O on line 27) and zero state of counter 2, the signal at the output of element And 14 in all channels of the device enters triggers 5 into 1, thereby locking the device to the configuration display mode.

In this mode, at the Kth state, the counters 2 from the output of the And 13 element to line 28 set 1 when the Kth subscriber is connected and 0 otherwise. In this case, on the leading edge of the transfer signal of counter 1, a record is made in the memory block 1.0 of the state from line 28 to the K-th address determined by the code in counter 2, and on the falling edge of the transfer signal of counter 1, the state of counter 2 is increased by 1, Thus Thus, after enumerating all the states of counter 2, the memory unit 10 will display information about the composition of subscribers connected to the trunk, and the Kth address of the memory unit 10 contains 1 when the Kth is connected and 0 when it is not connected. By the transfer signal of counter 2, the triggers 6, 5 in all channels are set to state 0, which fixes the output of the device from the configuration display mode. In this case, the transition to arbitration occurs.

In arbitration mode at 0 in trigger 5 at the moment of transition of counter 2 from (K-1) to

Kth state of transferring counter 1. with a delay sufficient for reading from the memory unit 10 on element 10 AND a signal for setting the counter 1 is generated if the Kth address of the memory unit 10 contains O (K-th subscriber is absent) , while in-. the versioned output of the memory unit 10 connected to the input of the AND 18-1 element. According to the signal from the output of the And 18 element, the counter 1 is set to a state that ensures the transfer upon receipt of a clock pulse from the input 29. If no signal is generated at the output of the And 18 element, the installation of counters 1 does not occur and the access authorization separation interval is fully counted.

With the K-th state of the counter 2, and the requirement to capture the trunk from the K-th subscriber (in the trigger 3 unit) by a signal with

the output of the comparison circuit 8 through element And 12 to trigger 4 is recorded T. When the trigger 3 is in a zero state, the signal at the zero input blocks the recording of units in trigger 4 by the difference at the C-input from the output of element 12. When recording 1 to trigger 4 through The isolation element (trunk amplifier) on the line 27 sets the bus busy signal.

Thus, the proposed device allows you to automatically display the composition of subscribers connected to the highway and based on this information during the arbitration process, shorten the intervals for granting access privileges when

non-connection of the respective subscribers, which allows to reduce the time of the access procedure (arbitration) and increase the productivity of the device.

40

Claims (1)

The claims A multi-channel device for connecting subscribers to a common trunk, each channel of which contains two counters, a first comparison circuit, two triggers, a delay element, an isolation element, and a memory unit, while the device channel clock input is connected to the counting input of the first counter connected to the output transfer to the input of the delay element and to the counting input of the second counter connected by a code output to the address input of the memory unit and to the first input of the first comparison circuit, request and reset inputs device channels are connected to the single and zero inputs of the first trigger, connected by the output through the isolation element to the first common line and to the zeroing inputs of the first and second counters of all device channels, different the fact that, in order to increase productivity, each channel of the device is equipped with three triggers, seven AND elements, a second comparison circuit, an NOT element and an OR element, while the output of the first comparison circuit is connected to the first inputs of the first and second AND elements connected by the second inputs, respectively to the inverse and direct outputs of the third trigger, connected as a single input to the output of the third AND element, connected by the first input to the output of the second comparison circuit and to the first input of the fourth AND element, connected the second input to the output of the fourth trigger, and the third input to the output of the element NOT and to the second input of the third element And connected by the third input through the second common line to the outputs of the second and fourth elements And all the channels of the device and to the data input of the memory unit, the third input of the second element And is connected to the output of the fifth trigger connected by a single input to the channel enable input of the device and to the first input of the element OR, and with a zero input - to the device channel inhibit input and to the second input of the OR element, connected by the output to the single input of the fourth trigger, connected by the zero input to the output of the fifth AND element, and to the zero input of the third trigger, connected by the direct output to the second the input of the fifth AND element and to the first input of the sixth AND element connected by the second input to the transfer output of the first counter, and by the output to the recording input of the memory block connected by the output to the first input of the seventh AND element connected to the second the input to the inverse output of the third trigger, and the output to the input of the installation of the first counter, the input of the element is NOT connected to the first common line, the first input of the second comparison circuit is connected to the code output of the second counter, the second inputs of the first and second comparison circuits are connected to the first and second code inputs of the device channel, the overflow output of the second counter is connected to the first input of the fifth element I.