SU1396288A1 - Arrangement for reserving channels in data transmission tract - Google Patents

Abstract

The invention relates to telecommunications and eliminates the loss of information when switching channels. The device contains control units (BC) of 1.2 main channels (OK), BC 3 backup channels, delay blocks 4.5, reservation control blocks (BUR) 6, 7, elements 8, 11-14, 17-19 , switching units 9,10,15,16, backup channel 20 and OK 21, 22. In the initial state, OK 21, 22 through the normally closed contacts of switching units 16, 15 and 9, 10 are connected respectively to, LC 1.2. With a sustained failure of the working OK 21 and a good backup channel 20 through the delay unit 4, a signal is received at the BUR 6. The reservation signal BUR 6 triggers element 8 and switching unit 9. This causes OK 21 to connect to BC 3, and instead of it to AC 1 and to the corresponding. The signal conversion device is connected to the backup channel 20. Similar switching is also carried out at the station interacting with this station. If after this a malfunction signal is received from BC 2, element I 18 and switch unit 16 will work. As a result, OK 22 will be replaced by OK 21. Then, if necessary, the backup channel 20 will be replaced by OK 22. 1 Il. wore

Description

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The invention relates to telecommunications and can be used in data transmission systems.

The purpose of the invention is to eliminate loss of information during switching of communication channels.

The drawing shows a structural electrical circuit of the proposed device.

The device for reservation of channels in the data transmission path contains the first and second blocks 1 and 2 of the control of the main channels, block 3 of the control of the backup channel, the first and second blocks 4 and 5 of the delay, the first and second blocks 6 and 7 of the redundancy control, the first element AND 8, the first and second blocks 9 and 10 of switching, the second, third, fourth and fifth elements And 11, 12, 13 and 14, the third and fourth blocks 15 and 16 of switching, the sixth, seventh and eighth elements And 17, 18 and 19, reserve channel 20, main channels 21 and 22.

The device works as follows.

At the moment of switching on the power supply, a pulse of the initial installation goes to the installation inputs of the delay blocks 4 and 5, the backup control blocks 6 and 7, and the switching blocks 9, 10, and 16. At the same time, the mentioned blocks are set to the initial state, at which the receive (PM) and transmission (PD) circuits of the backup communication channel 20 are connected in series with normally closed contacts of the switching units 10.9 and connected respectively to the input and output of the control unit 3 backup channel. The reception circuits of the first communication channel 21 are connected in series with normally closed contacts of switching units 16, 15, 9 to the input of control unit 1 of the main channel and the input of the receiver of the first signal conversion device (OCS 1), not indicated in the drawing, and the transmission circuit of the first channel 21 through connected in series normally closed contacts of switching blocks 16, 15, 9 are connected to the output of the UPS 1 transmitter (not indicated in the drawing). Similarly, via serially connected normally closed contacts of blocks 16, 15, 10 of the switching circuit of the second channel 22 are connected to the input of the receiver of the second GSM 2

(not shown in the drawing) and the input of the control unit 2 of the main channel, and the transmission circuits of the second channel are connected to the output of the UPS 2 transmitter (not shown in the drawing). If the working channel 21 fails, a signal is received at the second input of the delay unit 4. If the channel failure is steady, then after a certain period of time, block 4 of a delay on one of the clock pulses coming from UPS 1 (not shown in the drawing) at its quarter input will generate its signal which from the second output of block 4 of delay arrives at the input of block 6 of control redundancy provided that from the backup channel control unit 3 to the third input of the delay unit 4 there is no signal about the emergency condition of the backup channel 20.

Thus, with a sustained failure of the working channel 21 and a good backup (free) channel 20, the input of the backup control unit 6 receives a signal on which the unit 6 generates a backup signal (the signal to replace the failed channel 21 with the healthy channel 20). From the output of the backup control control unit 6, the signal goes to the first inputs of the AND elements 8, 11, 12, 13, but since the input signals only coincide at the input of the And 8 element, the signal from the output of block 6 through the And 8 element goes to the second control input switching unit 9. This signal causes the switching unit 9 to switch, resulting in the receiving circuit of channel 20 through the normally closed contacts of unit 10 being switched and the normally open contacts of the switch 9 of the switching unit 9 are connected to the input of the control unit I, and the transmission channels of channel 20 through the normally closed contacts of the unit 10 switching and normally open contacts of block 9 are connected to the output of the transmitter of the first OOPS 1 (not shown in the drawing). In this case, the reception and transmission circuits of the channel 21 through the normally closed contacts of the switching blocks 16, 15 and the normally open contacts of the switching unit 9 are respectively connected to the input and the output of the control unit 3. After the switching is completed, the supply of the dilution potential signal from the switching unit 9 to the second inputs from th

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elements and 8, 14 and performs the supply of a permissive potential signal to the second input of the element

And the second inputs of the elements And 18, To accomplish a similar switching at the interacting station, the delay unit 4 of this station before generating a signal at the second output generates a signal at its first output, which is transmitted in the UPS 1 transmitter (not shown in the drawing) signal (instead of the actual level, the level is transmitted zero). At the same time, at the station interacting with this, the reception level disappears, as a result of which the switching unit 9 of the interacting station also performs for prison on which the station is similar channel 21 is replaced by a channel 20. At a time interval from the moment of switching on the station until the switch

Secondly, the output of which is connected to the input of the control unit of the backup channel, the second control unit of the main channel, the input of which is connected to the second output of the second switching unit, and communication channels, characterized in that, in order to eliminate information loss when switching channels zi, eight And, third and fourth switching blocks and a second redundancy control block are introduced, the first input of which is connected to the first input of the first delay block, to the first input of the second delay block, with the first control the inputs of the first, second, third and fourth switching units and the first input of the first

0 of the redundancy control unit, the output of which is connected to the first inputs of the first, second, third and fourth elements AND, the output of the second redundancy control unit

neither at the station of the interacting block 25 is connected to the first inputs of the fifth,

The transmission level at the station is prohibited.

After performing the switch on both stations, the place of the backup (free) channel 20 is occupied by channel 21,

If, after the mentioned switching, the emergency signal again comes from control unit 2, then the output of the backup control unit 7 will generate a signal that will go to one of the inputs of AND elements 14,17,18,19. Since the signals coincide only at the inputs of AND 18, switching unit 16 will perform a direct switch, in which channel 22 will be replaced by channel 21, while channel 22 will perform the functions of the backup channel. If, after the mentioned switchings, the signal emergency state from control unit 1, the switching unit 9 will switch back, as a result of which the channel .. 20 will be replaced by channel 22.

Formulation Code

A device for reserving channels in the data transmission path containing the first control unit of the backup units is connected to the repeater, the first and second delay blocks, the first control unit of the main channel, whose input is connected to the first input of the first switch unit and the third control input of the third switch unit, respectively. , the third output of which is connected to the first output of the fourth switching unit

0

five

0

the sixth, seventh and eighth elements And, the output of the first control unit of the main channel is connected to the second input of the first delay unit, the third input of which is connected to the output of the backup channel control unit and to the third input of the second delay unit, the second input of which is connected to the output of the second control unit of the main channel, the outputs of the first and second elements And are connected respectively to the second and third control inputs of the first switching unit, the third output of which is connected to the first output of the third switching unit nor, the second one of which is connected to the fourth one of the second switching unit, the first terminal of which is connected to the fourth one of the first g of the switching unit, the fifth terminal of which is connected to the second input of the fifth And element and the second input of the first And element, the third input of which is connected to the third the input of the fifth element And the fifth of the second switch unit, the sixth of which is connected to the second input of the sixth element And and the second inputs of the third and fourth And elements, the outputs of which

the rum and the third control inputs of the third switching unit, the third output of which is connected to the first output of the fourth switching unit

5 13962886

The second one of which is connected to the fourth and eighth elementary unit of the third block of relays I, the outputs of the first and second block, the fifth and sixth terminals of the delays are connected to the second inputs connected to the third inputs of the first and second

the third and fourth backup management blocks respectively

And elements, the second input of the second elec- tresses of the fifth and sixth elements And

ment And is connected to the sixth one connected to the second and

the first switching unit and the second and third control inputs of the second

the inputs of the seventh and eighth elements of the Switching block, the third output of the koI, the outputs of which are connected to the corresponding one, is connected to the first channel

to the second and third control communication, the second and third communication channels

the main inputs of the fourth block are switched-connected, respectively, to the third

No, the fifth and sixth terminals of which to the fourth one of the fourth one are connected to the third inputs of the corresponding switching.

Claims (1)

Claim A device for reservation of channels in a data transmission path, comprising a first reservation control unit, a first and second delay unit, a first main channel control unit, the input of which is connected to the first output of the first switching unit, the second output of which is connected to the input of the backup channel control unit, the second control unit of the main channel, the input of which is connected to the second output of the second switching unit, and communication channels, characterized in that, in order to eliminate information loss during channel switching with ideally, eight And elements are introduced, a third and fourth switching unit and a second redundancy control unit, the first input of which is connected to the first input of the first delay unit, with the first input of the second delay unit, with the first control inputs of the first, second, third and fourth switching units and the first input of the first reservation control unit, the output of which is connected to the first inputs of the first, second, third and fourth AND elements, the output of the second reservation control unit is connected to the first inputs of the fifth, sixth, seventh and eighth elements AND, the output of the first control unit of the main channel is connected to the second input of the first delay unit, the third input of which is connected to the output of the control unit of the backup channel and to the third input of the second delay unit, the second input of which is connected to the output of the second unit control of the main channel, the outputs of the first and second elements AND are connected respectively to the second and third control inputs of the first switching unit, the third output of which is connected to the first output of the third block radiation, the second output of which is connected to the fourth output of the second switching unit, the first output of which is connected to the fourth output of the first switching unit, the fifth output of which is connected to the second input of the fifth element And the second input of the first element And, the third input of which is connected to the third input of the fifth element And the fifth output of the second switching unit, the sixth output of which is connected to the second input of the sixth element And and the second inputs of the third and fourth elements And, the outputs of which are connected respectively to the second and third control inputs of the third switching unit, the third output of which is connected to the first output of the fourth switching unit ^ the second output of which is connected to the fourth output of the third switching unit, the fifth and sixth outputs of which are connected to the third inputs of the third and fourth elements, respectively, the second input of the second element And is connected to the sixth output of the first switching unit and the second inputs of the seventh and eighth elements Yu And, the outputs of which are connected respectively to the second and third control the inputs of the fourth switching unit, the fifth and sixth outputs of which are connected to the third inputs of the correspondingly seventh and eighth elements of And, the outputs of the first and second delay units are connected to the second inputs of the first and second control units of redundancy, the outputs of the fifth and sixth elements of And are connected respectively, with the second and third control inputs of the second switching unit, the third output of which is connected to the first communication channel, the second and third communication channels are connected respectively to The family and the fourth terminals of the fourth switching unit.