KR950004499Y1 - Remoting loop back circuit of synchronous optical fiber multi plexing device - Google Patents
Remoting loop back circuit of synchronous optical fiber multi plexing device Download PDFInfo
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- KR950004499Y1 KR950004499Y1 KR92026771U KR920026771U KR950004499Y1 KR 950004499 Y1 KR950004499 Y1 KR 950004499Y1 KR 92026771 U KR92026771 U KR 92026771U KR 920026771 U KR920026771 U KR 920026771U KR 950004499 Y1 KR950004499 Y1 KR 950004499Y1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
- H04J3/0623—Synchronous multiplexing systems, e.g. synchronous digital hierarchy/synchronous optical network (SDH/SONET), synchronisation with a pointer process
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- Time-Division Multiplex Systems (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 비동기식 광다중화 장치에서의 원격 루프백 회로도.1 is a remote loopback circuit diagram of a conventional asynchronous optical multiplexing device.
제2도는 본 고안의 동기식 광다중화 장치에서의 원격 루프백 회로도.2 is a remote loopback circuit diagram of a synchronous optical multiplexing apparatus of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 광 수신부 20 : 역다중화부10: light receiving unit 20: demultiplexer
30 : 다중화부 40 : 광 송신부30: multiplexer 40: optical transmitter
50 : 일래스틱 버퍼50: elastic buffer
본 고안은 동기식 광다중화 장치에 적합하도록 한 원격 루프백 회로에 관한 것이다.The present invention relates to a remote loopback circuit adapted for a synchronous optical multiplexing device.
종래의 비동기식 광다중화 장치는 제1도에 도시된 바와 같이, 수신된 광신호를 전기적인 신호로 변환하고 클럭을 추출해내는 광 수신부(10)와, 광 수신부(10)에서 출력된 데이타와 클럭 신호를 역다중화하는 역다중화부(20)와, 송신 데이타와 송신 클럭 신호를 발생시키는 다중화부(30)와, 원격 루프 카운트값(CNT)에 따라 다중화부(30)에서 발생된 송신 데이타 및 클럭 신호나 광 수신부(10)에서 출력된 수신데이타 및 클럭신호를 광신호로 변환하여 송신하는 광 송신부(40)로 구성되어 있었다.In the conventional asynchronous optical multiplexing apparatus, as shown in FIG. 1, the optical receiver 10 converts a received optical signal into an electrical signal and extracts a clock, and data and clock signals output from the optical receiver 10. A demultiplexer 20 for demultiplexing the multiplexer, a multiplexer 30 for generating transmit data and a transmit clock signal, and a transmit data and clock signal generated by the multiplexer 30 according to a remote loop count value (CNT). And an optical transmitter 40 for converting the received data and the clock signal output from the optical receiver 10 into optical signals.
이와 같이 구성된 종래의 비동기식 광다중화 장치에서는 원격 루프백을 위하여 광 수신부(10)에서 수신된 데이타와 추출된 수신 클럭을 광 송신부(40)로 루프백시켜 수신 클럭에 맞추어 수신 데이타를 대국으로 전송하였다.In the conventional asynchronous optical multiplexing device configured as described above, the data received from the optical receiver 10 and the extracted received clock are looped back to the optical transmitter 40 for remote loopback, and the received data is transmitted to the power station in accordance with the received clock.
이를 좀더 상세히 설명하면, 수신된 광 데이타는 광 수신부(10)에서 전기적인 데이타로 변환되고, 여기서 추출된 수신 클럭과 함께 역다중화부(20)와 광송신부(40)로 전송된다.In more detail, the received optical data is converted into electrical data in the optical receiver 10, and is transmitted to the demultiplexer 20 and the optical transmitter 40 together with the extracted reception clock.
광 송신부(40)에서는 입력된 원격 루프 카운트값(CNT)에 따라 다중화부(30)에서 출력된 송신 데이타와 송신 클럭을 전송할 것인지 광 수신부(10)에서 출력된 수신 데이타와 수신 클럭을 전송할 것인지를 결정하게 되고, 결정된 데이타를 결정된 클럭 신호에 맞추어 광 데이타로 변환한 후 전송하게 된다.The optical transmitter 40 transmits the transmission data and the transmission clock output from the multiplexer 30 or the reception data and the reception clock output from the optical receiver 10 according to the input remote loop count value CNT. The determined data is converted into optical data according to the determined clock signal and then transmitted.
그러나 이러한 비동기식 광다중화 장치에서 사용되어진 원격 루프백 방식은 수신된 광 데이타에서 추출되어진 수신 클럭을 광전송 클럭으로 사용하므로 시스템 클럭으로 전송해야 하는 동기식 광다중화 장치에서는 사용할 수 없다는 문제점이 있었다.However, the remote loopback method used in the asynchronous optical multiplexing device has a problem that it cannot be used in the synchronous optical multiplexing device which needs to transmit the system clock since the received clock extracted from the received optical data is used as the optical transmission clock.
본 고안은 상기와 같은 종래의 문제점을 해결하기 위하여 안출한 것으로, 본 고안의 목적은 동기식 광다중화 장치에서의 원격 루프백을 위하여 광 수신부에서 발생된 수신 데이타를 송신 클럭인 시스템 클럭에 맞추어 송신할 수 있도록 하는 원격 루프백 회로를 제공하는데 있다.The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to transmit the received data generated at the optical receiver according to the system clock which is the transmission clock for the remote loopback in the synchronous optical multiplexing apparatus. To provide a remote loopback circuit.
이하, 첨부된 제2도를 참조하여 본 고안의 실시예를 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying Figure 2 will be described an embodiment of the present invention in detail.
제2도는 본 고안의 동기식 광다중화 장치에서의 원격 루프백 회로도로서 이에 도시된 바와 같이, 수신된 광신호를 전기적인 신호로 변환하고 수신 클럭을 추출해내는 광 수신부(10)와, 광 수신부(10)에서 출력된 데이타와 클럭 신호를 역다중화 처리하는 역다중화부(20)와, 송신할 데이타를 시스템 클럭에 따라 다중화 처리하여 발생시키는 다중화부(30)와, 광 수신부(10)에서 출력된 데이타를 수신 클럭에 따라 저장하고 저장된 데이타를 시스템 클럭에 따라 읽어 출력하는 일래스틱 버퍼(50)와, 원격 루프 카운트값(CNT)에 따라 다중화부(30)에서 출력된 송신 데이타나 일랙스틱 버퍼(50)에서 출력된 수신 데이타를 광신호로 변환하여 송신하는 광 송신부(40)로 구성되어 있다.2 is a remote loopback circuit diagram of the synchronous optical multiplexing apparatus of the present invention. As shown therein, an optical receiver 10 converting a received optical signal into an electrical signal and extracting a reception clock, and an optical receiver 10 A demultiplexer 20 for demultiplexing the data and the clock signal output from the multiplexer, a multiplexer 30 for multiplexing the data to be transmitted according to a system clock, and a data output from the optical receiver 10 An elastic buffer 50 which stores according to the reception clock and reads out the stored data according to a system clock, and transmits data or an elastic buffer 50 output from the multiplexer 30 according to a remote loop count value (CNT). And an optical transmitter 40 for converting the received data output from the optical signal into an optical signal for transmission.
상기와 같이 구성된 본 고안의 동기식 광다중화 장치에 광전송 데이타가 수신되면, 이 광신호는 광 수신부(10)에서 전기적인 데이타로 변환되고, 광 수신부(10)내부의 클럭 추출 회로에 의해 수신 데이타로부터 수신클럭이 추출되어진다. 광 수신부(10)에서 출력된 수신 데이타와 수신 클럭 신호는 역다중화 처리를 위해 역다중화부(20)로 전송되고, 동시에 원격 루프백을 위하여 상기 수신 데이타와 수신 클럭 신호가 일래스틱 버퍼(Elastic Buffer;50)로 전송된다.When the optical transmission data is received by the synchronous optical multiplexing apparatus of the present invention configured as described above, the optical signal is converted into electrical data in the optical receiving unit 10, and is converted from the received data by a clock extraction circuit inside the optical receiving unit 10. The receiving clock is extracted. The received data and the received clock signal output from the optical receiver 10 are transmitted to the demultiplexer 20 for the demultiplexing process, and at the same time, the received data and the received clock signal are stored in an elastic buffer for remote loopback. 50).
일래스틱 버퍼(50)에 전송된 수신 데이타는 수신 클럭에 동기되어 일래스틱 버퍼(50)에 저장되고, 저장된 데이타는 시스템 클럭 신호에 의해 읽혀져 광 송신부(40)로 전송된다.The received data transmitted to the elastic buffer 50 is stored in the elastic buffer 50 in synchronization with the reception clock, and the stored data is read by the system clock signal and transmitted to the optical transmitter 40.
광 송신부(40)에서는 입력된 원격 루프 카운트값(CNT)에 따라 일래스틱 버퍼(50)에서 생성된 데이타를 전송할 것인지 다중화부(30)에서 출력된 데이타를 전송할 것인지를 결정하게 되고 결정된 데이타를 광 데이타로 변환한 후 전송하게 된다.The optical transmitter 40 determines whether to transmit the data generated by the elastic buffer 50 or the data output from the multiplexer 30 according to the input remote loop count value CNT. The data is converted and then transmitted.
이상에서와 같이 본 고안은 동기식 광다중화 장치에서 일래스틱 버퍼를 사용하여 원격 루프백을 위해 수신된 데이타를 시스템 클럭에 동기시켜 전송하므로 데이타 손실없이 루프백을 행할 수 있는 효과가 있다.As described above, the present invention uses an elastic buffer in the synchronous optical multiplexing apparatus to transmit the received data for remote loopback in synchronization with the system clock, thereby performing loopback without data loss.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR92026771U KR950004499Y1 (en) | 1992-12-28 | 1992-12-28 | Remoting loop back circuit of synchronous optical fiber multi plexing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR92026771U KR950004499Y1 (en) | 1992-12-28 | 1992-12-28 | Remoting loop back circuit of synchronous optical fiber multi plexing device |
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| Publication Number | Publication Date |
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| KR940018221U KR940018221U (en) | 1994-07-30 |
| KR950004499Y1 true KR950004499Y1 (en) | 1995-06-05 |
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| KR92026771U KR950004499Y1 (en) | 1992-12-28 | 1992-12-28 | Remoting loop back circuit of synchronous optical fiber multi plexing device |
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