KR200282088Y1 - Interface board of the transmission system having a self-diagnosis function - Google Patents

Abstract

The present invention transmits and receives an STM1 optical signal from an external optical cable and loops back a self-diagnosis signal, an S / P converter for inputting / outputting a self-diagnosis signal via the optical transmitter and receiver, and the STMP converter. The STM1 ASIC unit performs overhead and STM1 frame processing on the optical signal and generates and outputs an internal self-diagnosis signal, and generates a self-diagnosis signal inputted and outputted through the STM1 ASIC unit to diagnose an abnormality of the STM1 interface board. Provided is an interface board of a transmission device having a self-diagnosis function including an FPGA unit and a display unit for displaying a result signal according to whether an abnormality of the STM1 interface board diagnosed by the FPGA unit to the outside.

The present invention as described above by generating a pattern signal for self-diagnosis in the STM1 interface board of the transmission equipment by measuring the loopback of the optical transmission and reception path of the STM1 interface board, it is possible to check the abnormality of the STM1 interface board without any additional measurement equipment accordingly Not only can the measurement cost of the STM1 interface board be significantly reduced, but the measurement range also accurately measures the overall transmit and receive path of the STM1 interface board, thus significantly improving the measurement accuracy of the STM1 interface board.

Description

Interface board of the transmission equipment having a self-diagnosis function

The present invention relates to an interface board of a transmission device equipped with a self-diagnostic function, and in particular, a self-diagnosis pattern signal is generated from the STM1 interface board of the transmission device, and the self-diagnosis function of loopbacking the optical transmission / reception path of the STM1 interface board is provided. It relates to the interface board of the transmission equipment.

In general, a transmission technology is a technology used to exchange information converted into an electrical signal with a counterpart, and is classified into a subscriber transmission connecting a subscriber and an exchange and an inter-station transmission connecting an exchange period. In particular, various types of systems such as a synchronous digital hierarchy (SDH) and a lesiochronous digital hierarchy (PDH) are currently developed and used in the transmission system for inter-station transmission. However, such a transmission system usually includes a function of processing data in a bit-interleaving manner and then transmitting the data to another wired system through an external optical communication cable using an STM1 device. Here, the SDH-based transmission is one of a method of transmitting a 53-byte ATM (Asynchronous Transfer Mode) cell in a frame of a synchronous transmission system, and some of them use SONET as a transmission system. In addition, the transmission rate of STM-1, the first level of the SDH, is 155.520 Mbps, the transmission rate of the second level, STM-4, is 622.080 Mbps, and the transmission rate of the third level, STM-16, is 2.488.320 Mbps. In the SDH based cell transmission, a cell boundary is identified using a pointer. At this time, the STM1 transmission system as described above is usually provided with an STM1 interface board for interfacing an external optical signal.

Then, referring to the conventional STM1 interface board as described above with reference to Figure 1, the optical transmission and reception unit 70 for transmitting and receiving the STM1 optical signal from an external optical cable, and the serial STM1 optical signal input from the optical transmission and reception unit 70 S / P converter 71 for converting in parallel or vice versa and overhead and STM1 frame processing are performed on the STM1 optical signal of S / P converter 71 and the measured signal is The STM1 ASIC unit 72, which executes the loopback function, converts the optical signal input from the STM1 ASIC unit 72 into a signal unit suitable for the upper board 73, outputs it through the connector pin 74, and vice versa. It includes an FPGA (75: field programmable gate array) for executing the.

In addition, the STM1 interface board 76 may be connected to the STM1 photometer 77 that can measure the abnormality of the board.

On the other hand, referring to the operation of the conventional STM1 interface board 76 as described above, first, when the STM1 class optical signal is input from an external optical cable (not shown), the optical signal is received by the optical transmitter / receiver 70 and receives a predetermined signal. The process is then output to the S / P conversion section 71. Then, the S / P converter 71 compresses the input serial STM1 optical signal into a parallel signal and outputs it to the STM1 ASIC unit 72. In addition, the STM1 ASIC unit 72 performs overhead and STM1 frame processing of the input parallel STM1 optical signal to the FPGA unit 75. In addition, the FPGA unit 75 converts the input STM1 optical signal into a signal unit suitable for the upper board 73 and transmits the signal to the upper board 73 through the connector pin 74.

In this case, when it is desired to measure the abnormality of the STM1 interface board 76, first, the STM1 photometer 77 is connected to the optical transmitting and receiving unit 70 of the STM1 interface board 76. When the STM1 photometer 77 generates a measurement signal and inputs the measurement signal to the optical transmitter / receiver 70, the optical transmitter / receiver 70 processes the input measurement signal to the S / P converter 71. Enter it. In addition, the S / P converter 71 converts the input serial measurement signal into a parallel signal and outputs the parallel signal to the STM1 ASIC unit 72. Then, the STM1 ASIC unit 72 analyzes the input measurement signal and loops it back to the S / P conversion unit 71 without passing it to the next FPGA unit 75.

The loopback measurement signal is received by the STM1 photometer 77 via the S / P converter 71 and the optical transmitter / receiver 70. Therefore, the STM1 photometer 77 analyzes and evaluates the measurement signal detected from the STM1 interface board 76 and displays the result signal corresponding to the outside so that the measurer determines whether there is an abnormality of the STM1 interface board 76. .

However, since the conventional STM1 interface board must be connected to an expensive photometer separately in order to measure the abnormality of the STM1 interface board, the measurement maintenance cost of the STM1 interface board is increased accordingly, as well as the optical Since the measurement signal transmitted from the instrument is not looped back through the transmission and reception path of the STM1 interface board, but only looped back in the STM1 ASIC unit 72, the accuracy of the measurement of the abnormality of the STM1 interface board is significantly reduced. .

Therefore, the present invention is designed to solve the above-mentioned problems, and by generating a pattern signal for self-diagnosis in the STM1 interface board of the transmission equipment and loopback measuring the optical transmission / reception path of the STM1 interface board, STM1 without any additional measurement equipment The purpose of the present invention is to provide an interface board of a transmission device equipped with a self-diagnosis function that can significantly reduce the measurement cost of the STM1 interface board since the interface board can be checked for abnormalities.

Another object of the present invention is to provide an interface board of a transmission device equipped with a self-diagnostic function that significantly improves the measurement accuracy of the STM1 interface board.

The present invention for achieving the above object is an optical transmission and reception unit for transmitting and receiving the STM1 optical signal from an external optical cable and loops back the self-diagnosis signal, S / P conversion unit for inputting and outputting the self-diagnosis signal via the optical transmission and reception unit; And an STM1 ASIC unit for performing overhead and STM1 frame processing on the STM1 optical signal of the S / P converter and generating and outputting an internal self-diagnosis signal, and generating a self-diagnosis signal inputted and outputted through the STM1 ASIC unit. An interface board of a transmission device having a self-diagnosis function includes an FPGA unit for diagnosing an abnormality of an interface board, and a display unit for displaying a result signal according to the abnormality of the STM1 interface board diagnosed by the FPGA unit. to provide.

1 is an explanatory diagram illustrating an STM1 interface board to which conventional measurement equipment is connected.

2 is an explanatory diagram illustrating an STM1 interface board of the present invention.

<Detailed Description of Codes>

1: optical transmitting and receiving unit 2: S / P conversion unit

3: STM1 ASIC part 4: Upper board

5: STM1 Interface Board 6: FPGA

7: display unit 8: optical transmitter

9: optical receiver 10: RBS pattern generator

11: AU3 frame generator 12: PRBS pattern checker

13: connector pin

Hereinafter, the present invention will be described in detail based on the accompanying drawings.

The apparatus of the present invention, as shown in FIG. 2, transmits and receives an STM1 optical signal from an external optical cable and loops back a self-diagnosis signal, and a serial STM1 optical signal input from the optical transmitter / receiver 1. S / P converter 2 for converting in parallel or performing the reverse process and inputting / outputting the self-diagnosis signal, and overhead and STM1 frame processing for the STM1 optical signal of the S / P converter 2 And the STM1 ASIC unit 3 for inputting and outputting the internal diagnosis signal, and converting and outputting the optical signal inputted and outputted from the STM1 ASIC unit 3 into a signal unit suitable for the upper board 4 and outputting the self-diagnosis signal. To generate an external display of a result signal according to the abnormality of the FPGA unit 6 and the STM1 interface board 5 diagnosed by the FPGA unit 6 to diagnose an abnormality of the STM1 interface board 5. And a display unit 7.

The FPGA unit 6 inputs an optical transmitter 8 for converting and outputting the STM1 optical signal input from the STM1 ASIC unit 3 into a signal unit suitable for the upper board 4 and the upper board 4. An optical receiver 9 for converting and outputting the processed STM1 optical signal to a lower processing signal, a PRBS pattern generator 10 for generating a PRBS pattern signal for self-diagnosis of the STM1 interface board 5, and the PRBS pattern STM1 input via the optical transmitter 8 and the AU3 frame generation unit 11 for generating an AU3 signal including the PRBS pattern signal generated by the generation unit 10 and outputting the AU3 signal to the STM1 ASIC unit 3. The PRBS pattern checking unit 12 detects and compares the PRBS pattern signal for self-diagnosis of the interface board 5 and outputs the result signal.

Next, the operation and effects of the present design device will be described.

The operation of the device of the present invention is, first, when an STM1 level optical signal is input from an external optical cable (not shown), the optical signal is received by the optical transmitter / receiver 1 and processed by a predetermined signal, and then the S / P converter 2 Is output. Then, the S / P converter 2 compresses the input serial STM1 optical signal into a parallel signal and outputs it to the STM1 ASIC unit 3. In addition, the STM1 ASIC unit 3 processes the input parallel STM1 optical signal through overhead and STM1 frames, and then outputs the processed AU3 signal to the optical transmitter 8 of the FPGA unit 6. The optical transmitter 8 of the FPGA unit 6 converts the input STM1 optical signal into a signal unit suitable for the upper board 4, and then transmits the STM1 optical signal to the upper board 4 through the connector pin 13.

On the other hand, when the STM1 optical signal is input to the optical receiver 9 of the FPGA unit 6 on the upper board 4, the optical receiver 9 converts the input optical signal into a signal suitable for the optical cable. Transfers to the reverse process.

Here, if it is desired to measure the abnormality of the STM1 interface board 5, first, the PRBS pattern for self-diagnosis of the STM1 interface board 5 in the PRBS pattern generator 10 of the FPGA unit 6 The AU3 frame generator 11 generates a signal. Then, the AU3 frame generation unit 11 generates an AU3 signal including the PRBS pattern signal output from the PRBS pattern generation unit 10 and then generates the AU3 signal through the optical receiver 9 to the STM1 ASIC unit 3. ) The STM1 ASIC unit 3 then inputs the AU3 signal including the input PRBS pattern signal to the S / P converter 2 after performing overhead and STM1 frame configuration. Further, the S / P converter 2 converts the input parallel AU3 signal into a serial signal and inputs it to the optical transmitter / receiver 1. Then, the optical transmitter / receiver 1 loops back to the S / P converter 2 after optical / pre-converting the input PRBS pattern signal. The S / P converter 2 converts the serial PRBS pattern signal looped back into a parallel signal and outputs the parallel signal to the STM1 ASIC unit 3. Then, the STM1 ASIC unit 3 converts the input PRBS pattern signal into an AU3 signal through overhead and STM1 frame processing, and then outputs the AU3 signal to the optical transmitter 8 of the FPGA unit 6.

Accordingly, the optical transmitter 8 outputs the AU3 signal including the PRBS pattern signal input via all transmission paths of the STM1 interface board 5 to the PRBS pattern checker 12. Then, the PRBS pattern checking unit 12 detects and compares the PRBS pattern signal for self-diagnosis of the STM1 interface board 5 input through the optical transmitter 8 and compares the result signal with the display unit 7. )

Therefore, the administrator of the STM1 interface board 5 may determine whether there is an abnormality of the STM1 interface board 5 by analyzing and evaluating the measurement result signal currently displayed on the display unit 7 without the need for connecting a separate measuring equipment to the board. .

As described above, the present invention generates a self-diagnostic pattern signal from the STM1 interface board of the transmission equipment and loops back and measures the optical transmission / reception path of the STM1 interface board, thereby checking whether there is an abnormality of the STM1 interface board without additional measurement equipment. This has the advantage of significantly reducing the measurement cost of the STM1 interface board.

In addition, according to the present invention, since the measurement range also accurately measures the entire transmission / reception path of the STM1 interface board, the measurement accuracy of the STM1 interface board is also significantly improved.

Claims (2)

An optical transmitter / receiver for transmitting and receiving an STM1 optical signal from an external optical cable and looping back a self-diagnostic signal, an S / P converter for inputting / outputting a self-diagnosis signal via the optical transmitter / receiver, and an STM1 optical signal for the S / P converter An STM1 ASIC unit that executes overhead and STM1 frame processing, and processes an internal self-diagnosis signal in and out, and an FPGA unit which generates an internal diagnostic signal inputted and outputted through the STM1 ASIC unit to diagnose an abnormality of the STM1 interface board. And a display unit for displaying a result signal according to the abnormality of the STM1 interface board diagnosed by the FPGA unit to the outside. The method of claim 1, wherein the FPGA unit generates a AU3 signal including a PRBS pattern generator for generating a PRBS pattern signal for self-diagnosis of the STM1 interface board, and a PRBS pattern signal generated by the PRBS pattern generator; And an AU3 frame generation unit for outputting through the bride and a PRBS pattern checker for detecting and comparing PRBS pattern signals for self-diagnosis of the STM1 interface board looped back through the optical transmitter and outputting the resultant signals. Interface board of transmission equipment with self-diagnostic function.