KR20000061906A - Supervisory apparatus of optical transmission system - Google Patents

Abstract

The present invention relates to a monitoring apparatus for an optical transmission system, wherein an optical / electric converter receiving an optical signal according to an operation mode converts data of information transmitted or received from another functional unit or information depending on a state of a line into an electrical signal. Output,

In the demultiplexer receiving the electrical signal, demultiplexing the AU-3 or AU-4 signal while extracting the relay section and the multi-section overhead,

The switching unit that receives the demultiplexed AU-3 or AU-4 signal transmits information according to data input to the MPU through an interface or receives and transmits information about a line selection from the MPU through an interface. Outputting data to the lower function unit together with the frame start signal and the received clock,

The supervisory control unit installed between the interface and the switching unit recognizes the state of the failure or hernia of the MPU as a strobe signal and switches the MPU by outputting a control signal for monitoring and controlling the alarm and switching the line. After the strobe signal transmitted to the unit is in a normal state or not, the switching unit recognizes a failure or hernia, and the switching unit performs the transfer of the line.

Description

Supervisory apparatus of optical transmission system

The present invention relates to a monitoring apparatus of an optical transmission system, and in particular, to diagnose a failure of a monitoring function unit between a monitoring function unit and a functional unit in an optical transmission system, and performs a function of monitoring, switching and alarm monitoring of a communication line by itself when a failure occurs. If it returns to normal after that, it relates to the monitoring device of the optical transmission system that allows the monitoring function unit to read the contents up to now and perform normal operation again.

In general, in the optical transmission system, there is a unidirectional monitoring function between the monitoring function unit and the function unit, and when a problem occurs in the line connected to each function unit in the monitoring function unit, an alarm is generated accordingly. It was.

The branch unit controller, which is the above functional unit, is mounted on the HSS self to convert the STM-16 optical signal inputted according to the operation mode of the system into an electrical signal, extracting the relay section and the multi-section overhead, and a plurality of AU-3s. After demultiplexing with the AU-4 signal, the data was sent to the lower function unit along with the frame start signal and the received clock.

In addition, the functional unit is an opto-electric converter (1) receiving a 2.5 Gbps STM-16 optical signal input according to the operation mode of the neighboring system as shown in FIG. )Wow,

A demultiplexer 2 which receives electrical data from the photoelectric converter 1 and demultiplexes the signals into 48 AU-3 or 16 AU-4 signals;

Receives 48 demultiplexed AU-3 or 16 AU-4 signals, extracts relay section and multi-section overhead, and transmits information based on data overhead input to MPU 5 via interface 4 The lower functional unit is connected with the frame start signal and the received clock while data is transmitted through the interface 4 to transmit or receive information on which line should be selected from the MPU 5. The switching unit 3 is configured to output.

However, since the MPU 5 is responsible for all functions of the optical transmission system by the conventional functional unit as described above, the alarm is extracted from the interface 4 due to the state of a hernia of the MPU 5 or a failure. If you do not take this function, the function unit will continue to receive abnormal data, which will prevent the system from functioning normally.

Accordingly, the present invention is to solve the above-mentioned disadvantages, it is installed in each functional unit in the optical transmission system to diagnose the failure of the monitoring function unit itself in the event of a failure of the monitoring and switching of the communication line and alarm monitoring It is an object of the present invention to provide a monitoring device for an optical transmission system that, when performing a function and recovering to normal, allows the monitoring function unit to read the contents of the operation so far and perform normal operation again.

The monitoring device of the optical transmission system according to the present invention for achieving the above object is to receive the data of the information transmitted or received with the other functional unit or the information according to the state of the line as the STM-16 optical signal of 2.5Gbps according to the operation mode, An optical / electric converter that converts a signal into a digital signal

A demultiplexer receiving electrical data from the opto-electric converter and demultiplexing into 48 AU-3 or 16 AU-4 signals,

Receives 48 demultiplexed AU-3 or 16 AU-4 signals and extracts the relay section and the multi-section overhead, and transfers information according to the overhead input of the data to the MPU through an interface or from any of the MPUs. Switching unit for outputting the data to the lower functional unit with the frame start signal and the received clock while performing the transfer of the line to receive and transmit the information about whether to select the line through the interface,

It is installed between the interface and the switching unit to recognize the status of the failure or hernia of the MPU as a strobe signal to configure the monitoring control unit for outputting the control signal for monitoring and control of the alarm and switching of the line to the switching unit MPU It is characterized in that the switching unit performs the transfer of the line after recognizing the state of the failure or hernia of the MPU by whether the strobe signal transmitted from the switching unit is in a normal state.

1 is a block diagram schematically showing a part of the internal configuration of a conventional functional unit;

2 is a block diagram showing a configuration of the present invention.

3 is a block diagram showing a detailed configuration of the present invention monitoring control unit.

Figure 4 is a waveform diagram showing the operation of the monitoring control unit of the present invention.

Explanation of symbols on the main parts of the drawings

11: optical / electric converter 12: demultiplexer

13 switch 14 interface

15: MPU 16: supervisory control unit

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows the overall configuration according to an embodiment of the present invention,

Opto-electric converter (11) for converting the data of the information transmitted and received with the other functional unit or the information according to the condition of the line as an STM-16 optical signal of 2.5Gbps according to the operation mode and converts it into an electrical signal and outputs it as data ,

A demultiplexer 12 which receives electrical data from the photoelectric converter 11 and demultiplexes the signals into 48 AU-3 or 16 AU-4 signals;

Receives 48 demultiplexed AU-3 or 16 AU-4 signals, extracts relay section and multi-section overhead, and sends information according to the overhead input of data to the MPU 15 via the interface 14. The lower functional unit includes the frame start signal and the received clock while performing data transfer over the interface 14 receiving information on which line should be transmitted or selected from the MPU 15. A switching unit 13 for outputting the

It is installed between the interface 14 and the switching unit to recognize the status of the failure or hernia of the MPU 15 as a strobe signal, and the control unit for monitoring and controlling the alarm and switching of the line to the switching unit 13 It consists of the monitoring control unit 16 to output.

3 illustrates the configuration of the monitoring control unit in detail.

The strobe signal from the MPU 15 is applied to the clock end of the first flip-flop 17 and the reset end of the up counter 18 and the second flip-flop 19,

An applied power source Vcc is applied to an input load of the up counter 18 at the output terminal Q of the first flip-flop 17 that is applied to the data terminal.

In the output terminal Q of the second flip-flop 19, to which the clock terminal is connected to the output terminal co of the up counter 18 and the applied power supply Vcc is applied to the data terminal, the failure or hernia of the MPU 15 is lost. It is to be recognized as a signal according to.

The monitoring apparatus of the optical transmission system of the present invention configured as described above is monitored by the switching unit 11 of the functional unit that receives the data of the information according to the state of the switching or operation of any line from the MPU 15 via the interface 14 The controller 16 determines a state in which the strobe signal is normally transmitted.

When the MPU 15 is in a normal operating state, the switching unit 11 converts the information or data of the 2.5 Gbps STM-16 optical signal to the optical / electric converter by the control signal transmitted from the MPU 15. In step 11, 48 AU-3 or 16 AU-4 signals, which are converted into electrical data and demultiplexed by the demultiplexer 12, are received and the information according to the over input of the data is passed through the interface 14. The frame start signal and the received clock are transmitted to the MPU 15 so as to perform information transfer based on which line should be selected from the MPU 15 through the interface 14 to perform the transfer of the line. To the lower function unit.

In addition, the switching unit 11 which receives data of information from another functional unit in the functional unit transfers the data of information according to the input of the data to the MPU 15 through the interface 14.

On the other hand, while performing the operation in the functional unit 10, the monitoring control unit 16 determines the state of normal or failure or hernia as the state of the strobe signal transmitted from the MPU 15 to control the switching unit 11 In the state where the strobe signal is normally applied to the clock terminal of the first flip-flop 17 as shown in FIG. 4A, the output terminal of the strobe signal as shown in FIG. While the signal is output, it is input to the input load of the up counter 18, but there is no change in the input value so that the count is not performed.

As shown in Fig. 4D, at the output end of the second flip-flop 19 to which the "L" as shown in Fig. 4C is output, the output of the up counter 18 is applied. A signal of "L" is output so as to recognize that the MPU 15 is operating normally.

In this state, when the strobe signal is abnormally applied to the clock terminal of the first flip-flop 17 as shown in (a) of FIG. 4, the output of the strobe signal is shown in (b) of FIG. As described above, a signal of "L" is output and is input to an input load of the up counter 18.

The up counter 18 counts " 1 " according to the change of the signal at the position where the cycle of the internal clock ends, and outputs a signal having a value of " H ".

As shown in Fig. 4D, at the output end of the second flip-flop 19 to which the "H" as shown in Fig. 4C is output, the output of the up counter 18 is applied. As the signal of H "is outputted, the MPU 15 is outputted as a signal indicating that the failure or hernia state is recognized.

Therefore, if it is determined that the failure of the MPU 14, the monitoring and control unit 16 performs the operation of switching the current line by reading the state of the switching unit 11 while performing the operation by the internal program logic.

When the strobe signal transmitted from the monitoring control unit 16 is normally reduced, a failure or hernia is released, and the operation of switching the line of the switching unit 11 is again stopped and then controlled by the MPU 14 again. Return to normal state.

Accordingly, in the optical transmission system of the present invention, in the optical / electric converter receiving the optical signal according to the operation mode, the data of the information transmitted or received with the other functional units or the information according to the condition of the line is converted into an electrical signal. Output,

In the demultiplexer receiving the electrical signal, demultiplexing is performed by the AU-3 or AU-4 signal,

The switching unit receiving the demultiplexed AU-3 or AU-4 signal extracts the relay section and the multi-section overhead, and transfers information according to the overhead input of the data to the MPU through an interface or from the MPU. Outputs data to the lower function unit along with the frame start signal and the received clock while making the transfer of the transmission and receiving information about the selection through the interface.

The supervisory control unit installed between the interface and the switching unit recognizes the state of the failure or hernia of the MPU as a strobe signal and switches the MPU by outputting a control signal for monitoring and controlling the alarm and switching the line. After the strobe signal transmitted to the unit is in a normal state or not, the switching unit recognizes a failure or hernia, and the switching unit performs the transfer of the line.

Claims (2)

Converts the data of the information according to the information or the state of the line into an electrical signal in the optical / electric converter 11 that receives the optical signal, The demultiplexer 12 receiving the electrical signal is demultiplexed into an AU-3 or AU-4 signal, The switching unit 13 receiving the demultiplexed AU-3 or AU-4 signal transfers information based on data overhead input to the MPU 15 while extracting the relay section and the multi-section overhead. A monitoring apparatus for an optical transmission system configured to output information to a lower functional unit together with a frame start signal and a received clock while performing transfer of a line for receiving and transmitting information according to a line selection from (15). The supervisory control unit 16 installed between the interface 14 and the switching unit recognizes a state of a failure or a hernia of the MPU 15 as a strobe signal and monitors and controls an alarm and controls a signal for switching over a line. Monitoring device for an optical transmission system, characterized in that configured to output to the switching unit (13). The strobe signal from the MPU 15 is transmitted to the clock end of the first flip-flop 17 and the reset end of the up counter 18 and the second flip-flop 19. To be authorized, An applied power source Vcc is applied to an input load of the up counter 18 at the output terminal Q of the first flip-flop 17 that is applied to the data terminal. The failure or disengagement of the MPU 15 at the output terminal Q of the second flip-flop 19 to which the clock terminal is connected to the output terminal co of the up counter 18 and the applied power supply Vcc is applied to the data terminal. Monitoring apparatus of the optical transmission system to output a signal according to.