JP2581419B2 - Transmission device and protection method using transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission device and a transmission device.
In particular, (n): 1
And a protection method using the transmission device .

[0002]

2. Description of the Related Art As shown in FIG.
A spare channel board 31, a plurality of channels board W _1, W _2, ... and W _n, a selection board 35 for selecting an output signal, the channel board W ₁ Apart from these externally,
W _2, and a monitoring board 51 to monitor ... W _n.

The spare channel board 31 includes a first selection circuit 32 for selecting input signals of a plurality of transmission paths S ₁ , S ₂ ,... _{Sn, and} an input signal selected by the first selection circuit 32. It has a first processing circuit 33 for processing and a first comparison circuit 34. Channel board W _1, W ₂
... W _n has on their second processing circuit _{d 1, d 2 ... d n} , and the second comparator circuit _{e 1, e 2 ... e n} . Selection board 35 is perforated channel board W _1, W _2, the output signal from ... W _n, the third selection circuit f _1, f ₂ to select the output signal from the spare channel board 1, a ... f _n doing. Monitoring board 51, first and second comparator circuit 34, e _1, e ₂ ... channel boards monitor signal 3 from e _n
8 is input to the control circuit 3 and output to the first selection circuit 32
6.

[0004] When a failure is detected by the second comparator circuit _{e 1, e 2 ... e n} , the monitoring board 51, and notifies the information (channel board monitor signal 38). In the control circuit 36 in the monitoring board 51, a third selection of the first selection circuit 32, and selects the board 35 in the spare channel board 31 circuit f _1, f ₂ by the information 38, controls the ... f _n A selection circuit control signal 39 is generated. Signals passing through channel board W _1, W ₂ ... W _n with disabilities, the third selection circuit f ₁ selection board 35 to bypass the spare channel board 31, f _2, normal transmission path at ... f _n S ₁ , S ₂ ,
... first selection circuit 32 and the third selection circuit f ₁ back to _{S n, f 2, ... f} n to operate (e.g., JP-6
JP-A-3-318839 and JP-A-2-141128
Reference).

[0005]

SUMMARY OF THE INVENTION In a conventional transmission device,
Channel board W _1, W _2, ... W comparator circuit e ₁ respectively second for fault detection of _n, e ₂ ... have e _n, and further monitor the results thereof, the third selection circuit f _1, f ₂ ,
... Since the monitoring board 51 for controlling f _n is separately required, there is a problem that the circuit scale (hardware scale), power consumption, and the like increase.

Accordingly, an object of the present invention is to simplify the circuit of a plurality of channel boards by performing fault detection of the channel boards collectively by a spare channel board, thereby obviating the need for a monitoring board for monitoring the channel boards. And a protection method using the transmission device .

[0007]

According to the present invention, a plurality of objects are provided.
Multiple channel boards connected to each of the transmission lines
And an input signal of the transmission line and the channel
A spare channel board to detect a failure of the board, the
Input the input signal of the transmission path via the channel board
The spare channel board has
A first selection circuit for selecting an input signal of a plurality of the transmission paths, a first processing circuit for processing the selected signal by the first selection circuit, the output from the channel boards
A second selection circuit for selecting the output signal of the transmission line, a control circuit for controlling the first and second selection circuits, an output signal of the first processing circuit, and the second selection circuit.
And a comparator circuit for reporting to the control circuit when it detects the fault by comparing the signal selected by the circuit, the tea
Each of the panel boards is equipped with a second
And a selection board for input signals of the transmission path.
From the channel board via the second processing circuit
The output signal output from the spare channel board
A transmission device having a third selection circuit for selecting an output signal to be output is obtained.

According to the present invention, a plurality of transmission paths
A plurality of channels board connected to respectively, the transmission
Circuit input signal and said channel board failure
A spare channel board for detecting the input of the transmission line
Select baud board to input signal through the channel board
And the spare channel board has a plurality of
A first selection circuit for selecting an input signal of the transmission path, the first
A first processing circuit for processing the signal selected by the selection circuit, the heat transfer output from the channel boards
A second selection circuit for selecting an output signal of a transmission path;
And a control circuit for controlling the second selection circuit, an output signal of the first processing circuit, and a selection circuit selected by the second selection circuit.
Signal comparing includes a comparison circuit for reporting to the control circuit upon detecting the failure, the channel board
Each having a second processing circuit mounted thereon,
The selection board converts the input signal of the transmission path into the channel box.
Output signal output from the second processing circuit through the second processing circuit.
Signal and the output signal output from the spare channel board.
A third selection circuit for selecting and No., the input signal of the transmission path selected by the first selection circuit is input to the comparator circuit via the first processing circuit, the channel < one of the output signals output from the board is selected by a second selection circuit and input to the comparison circuit, and the control unit selects the same channel selected by the first and second selection circuits. A signal of a board is selected, the channel boards are sequentially selected by the first and second selection circuits, and output signals are compared by the comparison circuit. When a failure is detected by the comparison circuit, the control is performed. A transmission apparatus for controlling a corresponding third selection circuit in the selection board from a circuit, selecting a signal of the first selection circuit, and performing protection of the failed channel board.
Thus, a protection method is obtained.

[0009]

The transmission device of the present invention and the protection by the transmission device
According to the operation method , the input signal of the transmission path is input to the selection board via the channel board. In the spare channel board, one of the input signals is selected, and the selected one of the signals output from the channel board via the first processing circuit is compared with the selected signal in the comparison circuit to detect a failure of the selected channel board. . In this case, the first and second selection circuits sequentially select signals of the same channel board. If a fault occurs, the first and second selection circuits stop the selection operation, and the third and the third selection circuits corresponding to the fault in the selection board are stopped.
Is controlled by the control circuit to select an output signal from the spare channel board. With the above operation, the protection of the channel board is performed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a transmission apparatus and a transmission apparatus according to the present invention will be described.
One embodiment of the protection method will be described with reference to FIG.

Referring to FIG. 1, the transmission device includes a plurality of transmission devices.
Road S _1, S _2, ... a plurality of tea connected to the respective S _n
N'nerubodo W _1, W _2, and ... W _n, the transmission path S _1,
S _2, receives an input signal of ... S _n and channel board
W _1, W _2, tea and reserved channels board 1 to detect a failure of ... W _n, the transmission path S _1, S _2, an input signal ... S _n
And a selection board 5 for inputting through the channel boards W ₁ , W ₂ ,..., W _n .

The spare channel board 1 includes a first selection circuit 8 for selecting one input signal of a plurality of transmission paths S ₁ , S ₂ ,... _{Sn, and} a signal selected by the first selection circuit 8. a first processing circuit 10 for processing, channel board W _1, W _2, ... transmission line S _1, S ₂ output from the W _n,
... and the second selection circuit 9 for selecting one of the output signals of S _n,
A comparator circuit 7 for receiving the output signal and <br/> The signal selected by the second selection circuit 9 of the first processing circuit 10, first and second
And a control circuit 6 for controlling the selection circuits 8 and 9.

Each of the channel boards W ₁ , W ₂ ,... W _n has a second processing circuit d ₁ , d _{2 ,.}
Is installed. The selection board 5, the channel board W _1, W _2, ... transmission line S _1, S ₂ from W _n, ... S _n
The output signal of the third selection circuit f _1, f ₂ to select a signal from the spare channel board 1 has a ... f _n.

Next, protection by this transmission device
The operation of the method will be described. Transmission path S _1, S _2, ... input signal S _n, the channel board W _1, W _2, is input to the selection board 5 through a ... W _n. Spare channel board 1 transmission paths S _1, S _2, ... enter the input signal S _n, the first selection circuit 8 by a single signal is selected, the first processing compared through the circuit 10 the circuit 7 Is input to

The channel boards W ₁ , W ₂ ,.
transmission path S _1, S ₂ output from _n, ... output signal S _n is input to the second selection circuit 9 by one selected comparison circuit 7. In this case, the first and second selection circuits 8, 9
Are controlled by the control circuit 6 in the same channel board W ₁ ,
W _2, to select the signal of ... W _n. In addition, the first and second
In the selection circuits 8 and 9 of the channel boards W ₁ , W ₂ ,.
W _n are sequentially selected. Comparison circuit 7, the channel board _{W 1, W 2, ... W} n transmission path S ₁ of, S _2, ... transmission line S ₁ through the S output signal processing circuit of the _n d _1, d ₂ and d _n, S _2, performs fault detection performed ... comparison between the output signal of S _n. The signal selected by the first selection circuit 8 is
The signal is processed by the first processing circuit 10 and compared with the signal selected by the second selection circuit 9 by the comparison circuit 7. If a failure is detected, the failure is reported to the control circuit 6.

At the time when a failure occurs, the first and second selection circuits 8 and 9 stop the selection operation. On the selection board 5,
The signal selected by the spare channel board 1 (the signal input to the faulty channel boards W ₁ , W ₂ ,..., W _n ) is input. Further, the control circuit 6 controls the corresponding third selection circuits f ₁ , f _{2 ,.}
Is controlled by the selection circuit control signal 19 to select the transmission path signal from the spare channel board 1.

By the above operation, the signals passing through the failed channel boards W ₁ , W ₂ ,..., W _n bypass the spare channel board 1 by the supervisory control of the spare channel board 1, and the channel boards W ₁ , W ₂ ,... W _n are executed.

[0018]

As described above with reference to the embodiments, the transmission device according to the present invention and the protection by the transmission device are provided .
According to the monitoring method , the selection circuit, the comparison circuit, and the control circuit are provided in the spare channel board, so that the other channel boards become only processing circuits, the circuit is simplified, and the monitoring of the channel board externally is performed. Boards and the like become unnecessary.

Therefore, since each channel is selected by the spare channel board and failure detection is performed by one circuit, the circuit becomes small, leading to reduction in power consumption and cost.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a transmission device according to the present invention and protection by the transmission device.
FIG. 4 is a block diagram showing one embodiment of an action method .

FIG. 2 is a block diagram illustrating an example of a conventional transmission device.

[Explanation of symbols]

1, 31 spare channel board 5, 35 selection board 6, 36 control circuit 7 comparison circuit 8, 32 first selection circuit 9 second selection circuit 10, 33 first processing circuit 34 first comparison circuit 51 monitoring board d _1, d ₂ ... d _n second processing circuit e _1, e ₂ ... e _n second comparator circuit f _1, f _2, ... the choice of f _n third circuit _{S 1, S 2, ... S} n transmission road _{W 1, W 2, ... W} n -channel board

Claims (2)

(57) [Claims] 1. A plurality of channel boards connected to a plurality of transmission paths, respectively, and an input signal of the transmission path is input.
And a spare channel board to detect a failure of the channel boards, the channel input signal of the transmission path
And a selection board to enter through the board, the preliminary
Channel board a first processing circuit for processing a first selection circuit for selecting <br/>-option input signal of the transmission path of the plurality of the signal selected by the first selection circuit, said Chang
A second selection circuit that selects an output signal of the transmission line output from the panel board; a control circuit that controls the first and second selection circuits; an output signal of the first processing circuit;
And a comparator circuit for reporting to the control circuit when it detects the fault by comparing the selected signal in the fine said second selection circuit, mounted is on their respective said channel board
A second processing circuit being, the selected boards said transmission
A second input signal from the channel board.
An output signal output through the
A transmission device comprising a third selection circuit for selecting an output signal output from a panel board . 2. A plurality of channel boards connected to a plurality of transmission paths, respectively, and an input signal of said transmission path is input.
And a spare channel board to detect a failure of the channel boards, the channel input signal of the transmission path
And a selection board to enter through the board, the preliminary
Channel board a first processing circuit for processing a first selection circuit for selecting <br/>-option input signal of the transmission path of the plurality of the signal selected by the first selection circuit, said Chang
A second selection circuit that selects an output signal of the transmission line output from the panel board; a control circuit that controls the first and second selection circuits; an output signal of the first processing circuit;
And a comparator circuit for reporting to the control circuit when it detects the fault by comparing the selected signal in the fine said second selection circuit, mounted is on their respective said channel board
A second processing circuit being, the selected boards said transmission
A second input signal from the channel board.
An output signal output through the
A third selection circuit for selecting an output signal output from the panel board, and selecting an input signal of the transmission line by the first selection circuit and sending the selected signal to the comparison circuit via the first processing circuit. type, the output signal outputted from the channel boards one selected by the second selection circuit is input to the comparator circuit, the same selected by the first and second selection circuits by the control unit Selecting a signal of the channel board, sequentially selecting the channel board by the first and second selection circuits, comparing output signals by the comparison circuit, and when a failure is detected by the comparison circuit, From the control circuit, the corresponding third
Protection by the transmission apparatus of controlling the selection circuit selects the signal of the first selection circuit, and performs protection of the channel board with disabilities
How .