SU1438015A1 - Arrangement for automatic redundancy of trunks - Google Patents

Abstract

The invention relates to radio relay lines. The purpose of the invention is to reduce the number of interruptions in information transmission. The device contains on the transmitter side switch .1, transceiver 2 backup signals, driver 3 marker signals and delay delay 4, on the receiver side, the control unit 5 of the trunk state, switch 6, the control unit 7, transceiver 8 of the backup signals receiver 9 marker signals and delay delay 10, as well as service communication channel 11. The goal is achieved by eliminating the reverse switching from the backup trunk to the SS of the restored main trunk. 1 il. (L / JpufMHOff e / rrffffOHa

Description

Invention} 1 relates to radio lines and can be applied to lines equipped with main and reserve trunks working according to the principle of private reservations.

The purpose of the invention is to reduce the number of leveryv in the transmission of information by eliminating the reverse switching from the backup trunk to the primary trunk.

The drawing shows a block diagram of an automatic stem backup device.

The device contains a switch 1 on the transmitting side, a transceiver 2 of the backup signals g, a shaper 3 marker signals and a delay element 4, on the receiving side a trunk condition monitoring unit 5, a switch 6- (control unit 7, a transmitter 8 of the backup signals, a receiver 9 of marker signals and a delay element 10, as well as a service communication channel 11,,

The device works as follows

In the initial state, stem switching is performed as follows:

1 barrel - A-trunk - trunk

2 barrel - B-barrel - 2 barrel

3 barrel B-barrel - 3 barrel

I Grave Barrel - S-Barrel - Reser

new trunk

The role of the backup trunk is performed by the G-trunk,

When the state of all barrels is working, on all inputs of the state control unit 5 there is no signal of damage to the barrels and the alarms from the state control unit 5 do not arrive at the output of unit 7 The system is in a steady state. Suppose that a B-trunk was damaged. In this case, from block 5 of the monitoring of the state of the trunks to the input of block 7, a signal is received about an accident In the barrel and in addition, from the output of the receiver 9 markers signals to block 7, information is received that the backup shaft corresponds to the G-trunk, and is operable. of these signals, the block 7 forms; m. and draws two of the sixteen possible commands, namely: at the transmitting end to connect the G-trunk parallel to the input of the B-trunk, connect the G-trunk, switch the backup trunk to B - the trunk, and also generate an alarm signal, Whitefish

The emergency alarm along with the switching commands is transmitted to the transceiver 8 of the redundancy signals, where it is converted into signals of the corresponding frequencies and sprinkled on the transmitting side, where the transceiver 2 is allocated the redundancy signals. The alarm signal is transmitted by the transceiver 8 of the redundancy signals only if the service link 11 is operational, connecting the transceivers 2 and 8 of the redundancy signals on the transmitting and receiving sides. The operability is checked by the presence of the control signal g transmitted by the transceiver 2 of the backup signaling signals from the transmitting side to the corresponding input of the transceiver 8 of the backup signals 5 If the control signal is not received at the receiving side, the alarm signal to the transmitting side is not transmitted. The switching commands are received by the transceiver 2 of the backup signals only upon receipt of an alarm signal. The received switching commands are transmitted to switch 1, and the switching command of the backup trunk to the failed B-trunk is sent to switch i with a delay through delay element 4

This allows the G-trunk to be connected in parallel to the failed main B-trunk, and then after the time required for the confirmation signal from the transmitting side to the receiving one to pass, switch 1 on the transmitting side and receive a confirmation signal by the block 7 6 on the receiver side, switch the backup trunk to the B-trunk, disconnecting the B-trunk from the third trunk. A confirmation signal is generated in the transceiver 2 of the backup signals upon receiving an emergency sy and it is a parcel with a frequency of 30.5 kHz and a duration of -2 s. It is transmitted to the receiving side, where the transceiver 8 is allocated the backup signals as a command for switching the switch 6, and is sent to block 7. With the arrival of this signal, the backup commands are remembered by the memory elements of block 7 and sent to switch 6, and

 143801

the backup trunk switching command to any of the failed main shafts, in this case the B-trunk, arrives at switch 6 from the output of block 7 with a delay carried out

delay element 10; after that, block 7 generates a command clear signal, which is fed to transceiver 8 of the backup signals and stops feeding the alarm side of the transmitter. This completes the switching cycle, the backup system goes into a stable state. From this point on, the backup trunk performs the function 15 of the failing main trunk from which the switch was made, in this case B-trunk, While this signal is faulty, there is no reserve and the trailing block 20 geeks based on the information that the B-trunk corresponds to the reserve

the trunk and that the B-trunk is faulty, if another trunk fails, the switching command does not form, 25 After the restoration of the B-trunk, t, e, with the appearance of a working reserve, in case of failure of any of the main trunks (A, B, d) the failed, for example, Z-trunk, switches to the backup B-trunk in the same way as described, and after switching, the function of the backup trunk is performed by the failed main trunk, from which the switch was made,., g but only after its restoration, t, e. A-trunk.

Claims (1)

Claims An automatic trunk backup device comprising, on the transmitting side, a switch, a transceiver of backup signals, the first output of which is connected to the first yvpravl y switch input, on the receiving side of the receiver-transmitter 5 redundancy signals, the control unit of the trunk states, the switch and the control unit, the first output of which is connected to the first control input of the switch, the information 50 inputs of which are connected to the corresponding the inputs of the stem state monitoring unit, the output of which is connected to the first input of the control unit; the second output of which is connected to the first input of the transceiver of the backup signals, the first output connected to the second input of the control unit, the switch outputs on the transmitter side of the device are connected to the information inputs of the switch on the receiver side of the device through a communication link, the second transceiver output signal of the reserve resources on the receiver side is connected to the transceiver input of the backup signals on the transmitter side of the device through the service communication channel, the second output of which is connected to the second transceiver transceiver on the receiving side via the channel service communication, characterized in that, in order to reduce the number of transmission interruptions by excluding reverse switching from the backup trunk to the restored main trunk, a marker generator and a delay element are inputted on the transmitting side, while the second output of the transceiver of the redundancy signals on the transmitting side is connected with the input of the delay element, the output of which is connected to the second control input of the switch of the transmitting side, whose information inputs are connected with The current outputs of the marker-signal generator, at the receiving side are the receiver of marker signals and the delay element, the receiver inputs of the marker signals are connected to the corresponding information inputs of the switches of the receiving side, the output of the marker signals receiver is connected to the third input of the control unit, the third output of which is connected to the input a delay element whose output is connected to the second control input of the switch on the receiving side.