KR20010054911A - A device of switching to protection unit in communication system - Google Patents

Abstract

PURPOSE: A preliminary switching apparatus of a communication system is provided to perform a required switching function even though there occurs an error in a main controller or the main controller fails to operate by rendering a preliminary processor to perform a monitoring function of each processor and each relay unit to directly perform a switching to a preliminary equipment for a defective equipment. CONSTITUTION: An interface unit(10) matches a plurality of external communication lines or channels which can transmit a signal corresponding to each optical cable and a corresponding processor of a unit. A plurality of relay units(100,200,300) respectively include receiving transformers(110,210,310) connected to the interface unit(10), for generating the same two signals from a signal applied through one path and outputting it to two different paths, a transmitting transformers(120,220,320) for outputting the signals applied through two paths into one path, receiving switches(130,230,330), transmitting switches(140,240,340) and switching switches(150,250,350) for performing an ON/OFF function according to a control signal applied from a preliminary processor. A plurality of processors(400,420,440) are connected to the relay units(100,200,300), receive a signal from the relay units(100,200,300), process and output the processing signal to the relay units(100,200,300). The preliminary processor(500) controls an ON/OFF switching operation of the receiving switches(130,230,330), transmitting switches(140,240,340) and the switching switches(150,250,350) according to a control signal applied from a main controller, and performs the same function as the processors(400,420,440). A CPU(90) is connected to the processors(400,420,440) and the preliminary processor(500) and collectively performs a signal processing and a switching processing of a communication system.

Description

A DEVICE OF SWITCHING TO PROTECTION UNIT IN COMMUNICATION SYSTEM}

The present invention, in the equipment that should be normally operated for 24 hours a day, such as a communication system used for public purposes, when a failure occurs in the current operating system is not possible to operate normally, the spare system provided as a replacement to operate In particular, the present invention relates to a preliminary switching device of a communication system that can be switched regardless of the number of operating systems, and improves reliability by distributing switching functions to each operating system.

A communication system used for public use must accommodate a communication line or communication channel by many subscribers, and the communication line or channel as described above is separated from the communication system in one embodiment through a pair of copper telephone lines. Is connected.

A communication channel connection between a communication system and a communication system that simultaneously accommodates a large number of subscribers as described above is also, in one embodiment, using a large number of copper telephone lines, or in another embodiment, a communication line such as a few optical cables. Use to transmit the signals of many communication channels as above.

In case of using a separate copper telephone line for a communication line or channel between the communication systems as described above, if one specific communication line or channel fails, only one subscriber is unable to communicate and the communication line is switched. Communication can continue through.

However, as shown in another embodiment of the present invention, when an optical cable is used as one communication line or channel to accommodate a large number of subscriber channels, the optical cable line is one, but a communication line transmitted through the optical cable line or The channel, i.e., the subscriber channel, becomes very large, and if the fiber cable line fails, many subscribers cannot communicate at the same time.

In other words, not only the above-described line but also a device for processing a high-capacity channel-class signal of communication equipment, a preliminary stagnation device in case of a failure is required. It was a one-to-one (1: 1) changeover concept, but the reliability of electronic components and the reliability of electronic devices are improved by modern advanced technology. In terms of waste, it was inefficient.

Therefore, when a failure occurs in any one of the N normal operating equipment by providing a reserve device in a constant numerical ratio, that is, N to 1 concept among a plurality of equipment to be operated, the transfer was made.

Hereinafter, with reference to the accompanying drawings will be described a preliminary switching device of the signal processing apparatus according to an embodiment of the prior art.

1 is a functional block diagram of a preliminary switching device of a communication system according to an embodiment of the prior art.

Referring to the accompanying FIG. 1, the preliminary switching device according to an embodiment of the prior art, as an embodiment, an interface unit 10 for connecting to a plurality of optical cable communication lines,

A first transformer 22 connected to the interface unit 10 to transmit and receive a signal, and outputting one input signal as two identical signals, each having a connection port of two to one; A first relay unit 20 comprising a first switch 24 having a two-to-one connection contact point,

Second to N-th relay units 30 and 40 having the same configuration and function as the first relay unit 20, and

The first to Nth transformers 22, 32, and 42, which are components of the relay units 20, 30, and 40, are connected to one output terminal to receive a signal, and at the same time, the first to Nth switches 24, 34. First, second, and Nth processing units (60, 62, 64) connected to one side contact of (44) and outputting a corresponding signal;

First N contact switch 52 to which contacts are connected to the other end of the first to Nth transformers 22, 32, and 42, respectively: the other end of the first to Nth switches 24, 34, and 44. A switching part 50 including a contact point and a second N contact switch 54 to which the corresponding contact point is respectively connected;

A protection unit 70 connected to the first N contact switch 52 to receive a signal and connected to the second N contact switch to output a signal;

It is composed of a central processing unit 90 is connected to the first to N-th processing unit (60, 62, 64) and the preliminary processing unit 70 for intensive processing.

With reference to the accompanying drawings a preliminary switching device according to the prior art of the above configuration will be described in detail.

The preliminary switching device according to the prior art is for switching the communication line, and is directly connected to the communication channel of each optical cable through the interface unit 10, and each of the connected channels or lines is corresponding to the first through the corresponding. The first to Nth transformers 22, 32 and 42 and the first to Nth switches 24, 34 and 44, which are components of the Nth relay unit 20, 30 and 40, respectively.

The signal applied to the input terminal of the first transformer 22, which is a component of the first relay unit 20, is output at the same magnitude to the two output terminals of the transformer, and one output terminal of the first transformer 22 is the first output terminal. 1 is applied to the processing unit 60, and is again applied to the central processing unit 90.

The output of the first processor is applied to one side contact of the first switch 24 and transmitted through the corresponding communication line or channel through the interface unit 10.

At the same time, the other one end of the first transformer 22 is connected to one contact of the first N contact switch of the switch 50, and the other end of the first switch 24 is connected to the switch ( Is connected to one contact of the second N contact switch of 50).

Since the second relay unit 30 and the N-th relay unit 40 also have the same configuration and function as the first relay unit, further description thereof will be omitted.

First, the operation of the first relay unit 20 will be described. A signal received from the interface unit 10 through one output of the first transformer 22 is applied to the first processor 60 to correct an error. Is processed, and is applied to the central processing unit 90 to be classified for each subscriber channel to perform data processing and switching processing, and the processed signal is applied to the first processing unit 60 again to perform error correction processing. Later, it is applied to the interface unit 10 through the first switch 24, so that it is transmitted to the corresponding optical cable. In addition, the second to Nth relay units 30 and 40 operate in the same manner.

The main controller 80 monitors and controls the first to Nth relay units 20, 30, and 40 through the first to Nth processing units 60, 62, and 64, and the preliminary processing unit 70 and The switching unit 50 directly monitors and controls.

As an example, a main controller (not shown) may confirm that a signal of a corresponding optical cable is not applied to the central processing unit 90 because a failure occurs in the first processing unit 60 or the first relay unit 20. When the main controller not shown in the drawing applies a control signal to the first relay unit 20 through the first processing unit 60, the contact point of the first switch 24 is changed, and The control signal is applied to the switching unit 50 and the preliminary processing unit 70.

The first and second N contact switches 52 and 54 of the switching unit 50, which receive a control signal from a main controller not shown in the drawing, are connected to the first transformer 22 and the first switch 24. The contact connected with is selected, and the preliminary processing unit 70 is made operable.

Therefore, the signal of the communication line applied from the interface unit 10 to the first relay unit 20 is transmitted to the first N contact switch 52 through the output of the other end of the first transformer 22. It is applied to the preliminary processing unit 70 by being applied.

The preliminary processing unit 70 has the same function as that of the first processing unit 60 in which the failure occurs, and after the error correction processing, the preliminary processing unit 70 is applied to the central processing unit 90 and the processing is completed from the central processing unit 90. The applied signal is applied to the second N contact switch 54 and applied to the interface unit 10 through the first switch 24.

Through this process, the preliminary processing unit 70 replaces the function of the first processing unit 60 in which the failure occurs, and the main controller not shown in the drawing is similarly provided to the maintenance personnel through the centralized management device not shown in the drawing. An alarm signal is generated, and when detecting that the repair is completed by the maintenance personnel, the control signal is applied to the first relay unit 20 and the switching unit 50 again, thereby providing the first switch 24. , Return the first and second N contact switch (52, 54) to the normal state.

The normal state of the first to Nth switches 24, 34 and 44 is connected to the upper contact in the drawing, and the first and second N contact switches 52 and 54 are connected to any one of the N contacts. It is not connected.

Since the operations of the second and Nth relay units 30 and 40 operate in the same manner as described above, a detailed description thereof will be omitted.

However, the preliminary switching device according to the prior art has a problem that the entire preliminary switching device becomes uncontrollable when a failure occurs in the main controller not shown in the drawing.

In addition, since the preliminary switching function is concentrated in the switching unit 50, when a failure occurs in the switching unit 50, all switching functions are stopped, and the first and second N contact switches have N contacts. Since it has to be expensive, there is a problem that the configuration is complicated and easily breakdown.

In the present invention, when the main controller fails, the monitoring function of each processing unit is replaced by the preliminary processing unit, and the transfer of the failing equipment to the preliminary equipment is performed directly by each relay unit, thereby preparing for the main controller's failure. It is an object of the present invention to provide a preliminary switching device which is capable of switching directly from the relay unit to the preliminary equipment instead of the centralized type of the preliminary switching.

In order to achieve the above object, the present invention provides an interface unit for matching a plurality of external communication lines and respective internal processing units, a receiving transformer and a transmitting transformer connected to the interface unit, a receiving switch, a transmitting switch, and switching. A plurality of relay units comprising switches; a plurality of processing units connected to the plurality of relay units, respectively, for processing an applied signal and outputting a processed signal; and the plurality of relay units switches by a control signal of an external main controller It is characterized in that the preliminary switching unit of the communication system comprising a pre-processing unit for controlling the switching operation and at the same time performing the same function as the function of the processing unit, and a central processing unit connected to the plurality of processing units and the preliminary processing unit. .

1 is a functional block diagram of a preliminary switching device of a communication system according to an embodiment of the prior art;

2 is a functional block diagram of a preliminary switching device of a communication system according to an embodiment of the present invention;

3 is a control signal connection diagram of a preliminary switching device according to the present invention.

** Explanation of symbols on the main parts of the drawing **

10: interface unit 20, 30, 40, 100, 200, 300: relay unit

22,32,42,110,120,210,220,310,320: Transformer

24,34,44,130,140,150,230,240,250,330,340,350: switch

52,54: N contact switch 50: switch

60,62,64,400,420,440: Processor 70,500: Preprocessor

Hereinafter, with reference to the accompanying drawings will be described a preliminary switching device of the communication system according to the technology of the present invention.

2 is a functional block diagram of a preliminary switching device of a communication system according to an embodiment of the present invention, and FIG. 3 is a block diagram of a control signal connection of the preliminary switching device according to the present invention.

Referring to the accompanying drawings, the apparatus for preliminary switching of the communication system according to the present invention includes a plurality of external communication lines or channels capable of transmitting signals corresponding to respective optical cables and corresponding processing units inside the apparatus, respectively. Interface unit 10 for matching (Matching),

Receiving transformer (110, 210, 310) connected to the interface unit 10, and generates a signal received through one path to the same two signals and output to each of two different paths; Transmission transformers 120, 220, and 320 for outputting signals applied through two paths to one path; The reception, transmission, and transfer switch includes a plurality of relay units (100, 200, 300) including a reception switch (130, 230, 330), a transmission switch (140, 240, 340), and a transfer switch (150, 250, 350) that perform an on / off function according to a control signal applied from the preliminary processing unit. ,

A plurality of processing units 400, 420, 440 connected to the plurality of relay units 100, 200, 300, respectively, after receiving and processing a signal from a corresponding relay unit 100, 200. 300, and then outputting the processed signal back to a corresponding relay unit 100, 200. 300. Wow,

Unification of each of the reception switches 130, 230, 330, the transmission switches 140, 240, 340, and the transfer switch 150, 250, 350 constituting the plurality of relay units 100, 200, 300 by a control signal applied from a main controller not shown in the drawing. A preliminary processing unit 500 that controls an on / off switching operation and performs the same function as that of the processing units 400, 420, and 440,

The central processing unit 90 is connected to the plurality of processing units 400, 420, 440 and the preliminary processing unit 500 to concentrate the signal processing and the switching processing of the communication system.

Hereinafter, the preliminary switching device of the present invention having the above configuration will be described in detail with reference to the accompanying drawings.

The corresponding receiving transformers 110, 210, and 310 of the relay units 100, 200, and 300 receiving the signals to be processed from the interface unit 10 through the corresponding optical cables or the lines of the communication channel receive the signals applied to the input side at the same level. After dividing into two signals, the output signal is applied directly to the input terminal of the processing unit 400, 420, 440, and the other output signal is applied to the corresponding receiving switch (130, 230, 330), respectively.

Each of the receiving switches 130, 230, and 330 is operated by a control signal of a main controller not shown in the figure, and a control signal applied from the preliminary processing unit 500 performing the same function as the first to Nth processing units 400, 420, and 440. It operates in the off state by the.

In other words, the receiving transformer (110, 210, 310) is applied to the processing unit (400, 420, 440) the received signal, the corresponding receiving switch (130, 230, 330) is turned off by the control signal of the main controller not shown in the figure Therefore, the pre-processing unit 500 is not applied.

Each of the corresponding processing units 400, 420, and 440 processes the received signal by the corresponding function and then applies the corresponding signal to the transmission switches 140, 240, 340 of the corresponding relay unit 100, 200, 300, respectively.

The output signal of the preliminary processing unit 500 operated by a control signal applied from a main controller not shown in the drawing controls the transmission switches 140, 240, and 340 so as to operate in an on state. The signals processed by the to N th processing units 400, 420, and 440 are applied to the corresponding transmission transformers 120, 220, and 320. At the same time, each of the transfer switches 150, 250, and 350 is turned off by the control signal of the preliminary processing unit 500, thereby preventing the signal generated and output from the preliminary processing unit 500 from being applied.

In detail, the transmission transformers 120, 220, and 320 receive signals from two input terminals receiving the same size signal, and corresponding transmission switches 140, 240, 340 are connected to one input terminal, and the other input terminal. The corresponding transfer switches 150, 250 and 350 are connected to each other to receive an input signal. However, one of the transfer switches 140, 240 and 340 and the transfer switches 150, 250 and 350 is turned on under the control of the preliminary processing unit 500. In operation, the other switch is turned off, and the signals applied through the transmission switches 140, 240, 340 and the transfer switches 150, 250, 350 are output at the same level and applied to the interface unit 10.

The state of the above configuration is a state in which each of the relay unit 100, 200, 300 and each processing unit 400, 420, 440 is operating normally, in one embodiment, when a failure occurs in any part does not operate normally, as shown in the figure The main controller, which is not present, detects the processing units 400, 420 and 440 having a fault and controls the relay units 100, 200 and 300 so that a received signal applied to the corresponding channel or line is not applied to the processing unit 400, 420 or 440 having a fault. At the same time, it is applied to the preliminary processing unit 500, and the signal is processed by the preliminary processing unit 500, and then applied to the corresponding relay unit (100, 200, 300) to be transmitted.

As an embodiment, when a fault occurs in the second processing unit 420 and a signal cannot be processed normally, a main controller not shown in the drawing, such as the control and monitoring signal connection diagram of FIG. By monitoring and controlling the units 100, 200, 300, the processing units 400, 420, 440, and the preliminary processing unit 500, the second processing unit 420 detects that a failure has occurred and applies a control signal to the preliminary processing unit 500.

The preliminary processing unit 500 applies the control signal to the corresponding second relay unit 200 of the second processing unit 420 in which the failure occurs, so that the second receiving switch 230 is turned on. The second transmission switch 240 is turned off, and the switching switch 250 is turned on.

Therefore, the received signal applied through the corresponding channel from the interface unit 10 is applied to the second receiving transformer 210 of the second relay unit 200 and through the second receiving switch 230. After being processed by the preliminary processing unit 500, the central processing unit 90 receives control and necessary processing.

The central processing unit 90 does not receive a signal from the second processing unit 420 in which the failure occurs by performing necessary control communication with the main controller not shown in the drawing through a communication line not shown in the drawing. After performing the necessary signal processing on the signal received from the processor 500, the control signal is applied to the preprocessor 500.

Signals processed and output from the preliminary processing unit 500 are simultaneously applied to all the switching switches 150, 250, and 350, but only the second transfer switch 250 is turned on by a control signal of the preliminary processing unit 500. Since it operates in a state, it is output to the interface unit 10 through the second transmission transformer 220.

Accordingly, the function of the second processing unit 420 in which the failure occurs is performed by the preliminary processing unit 500, which is switched, and is displayed on the display unit of the central processing unit 90 in control communication with the main controller. By displaying the fault occurrence status of the processing unit 420, the operation and maintenance personnel take necessary measures so that the fault occurrence situation of the second processing unit 420 is quickly released.

When the failure occurs by the maintenance personnel, the main controller not shown in the drawing applies a control signal to the preliminary processing unit 500, and the preliminary processing unit 500 is the second relay unit 200. By applying a control signal corresponding to the, the second receiving switch 230 is Off (Off) operation, the second transmission switch 240 is On (On), the second switching switch 250 is off By performing the operation (Off), the preliminary processing unit 500 returns to the standby state, and the normal processing second processing unit 420 receives and processes the signal of the corresponding communication channel or line and outputs the signal.

In addition, when a failure occurs in the main controller not shown in the drawing and does not operate normally, the preliminary processing unit 500 detects a failure state of each of the relay units 100, 200, 300 and the processing units 400, 420, 440, and the corresponding relay unit. By applying a control signal to (100, 200, 300), in place of the monitoring and control function of the main controller, the central processing unit 90 is unable to communicate with the main controller, so that the main controller has detected that a failure has occurred in the display unit By displaying, the maintenance personnel quickly repairs, and the main controller which has been canceled by the repair or maintenance starts communication with the central processing unit 90, so that the central processing unit 90 recognizes that the failure has been terminated, Monitor and control each function unit, and if there is a malfunctioning function unit, the control signal is By applying it to the rear part 500, the same control measures as above are taken.

Therefore, in the present invention as described above, the main controller not shown in the drawing may perform a necessary switching function even if the main controller does not operate or the main controller does not operate, and a switch having a switching function is distributed in each of the relay units 100, 200, and 300. Therefore, when a failure occurs in a specific relay unit, only the corresponding relay unit 100, 200, 300 may not operate, and other relay units 100, 200, 300 may operate normally. No switch for the contacts is required, only the unoff switch needs to be added.

According to the present invention as described above, even if a failure occurs in the main controller of the preliminary switching device, the preliminary processing unit can replace the switching function, so that the function of the processing unit in which the failure occurs can be replaced.

In addition, since the transfer switch is not concentrated and distributed to each relay unit, when the transfer switch fails, the entire preliminary transfer device does not work. Therefore, the use of expensive N contact switches is eliminated. The cost of the preliminary changeover device is low, the possibility of failure is reduced, and the reliability of the device has an industrial use effect.

Claims (2)

An interface unit for matching a plurality of external communication lines with respective internal processing units, A plurality of relay units comprising a receiving transformer, a transmitting transformer, a receiving switch, a transmitting switch, and a switching switch connected to the interface unit; A plurality of processing units connected to the plurality of relay units, respectively, for processing an applied signal and outputting a processed signal; A preliminary processing unit which controls the plurality of relay unit switches to be switched by a control signal of a main controller and performs the same function as that of the processing unit; And a central processing unit connected to the plurality of processing units and the preliminary processing unit for intensive processing. According to claim 1, Receiving, transmitting and switching switch of the relay unit is a pre-switching device of the communication system, characterized in that the function of the on / off by the control signal applied from the preliminary processing unit.