JP2616508B2 - Monitoring signal detection method - Google Patents
Monitoring signal detection methodInfo
- Publication number
- JP2616508B2 JP2616508B2 JP6964991A JP6964991A JP2616508B2 JP 2616508 B2 JP2616508 B2 JP 2616508B2 JP 6964991 A JP6964991 A JP 6964991A JP 6964991 A JP6964991 A JP 6964991A JP 2616508 B2 JP2616508 B2 JP 2616508B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- binary
- average voltage
- electric signal
- average
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
- Optical Communication System (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は光中継器用の監視信号検
出方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to monitoring signal detection for optical repeaters.
Outgoing system.
【0002】[0002]
【従来の技術】従来のこの種の監視信号検出方式におけ
る監視信号の重畳方式としては、非サービス時に監視信
号で2値データのマーク率を変調するマーク率変調方式
や、サービス時に監視信号で通信用データにパリティ側
違反を生じさせるパリティバイオレーション方式があ
る。2. Description of the Related Art In a conventional monitoring signal detection system of this kind,
As a superimposition method of a supervisory signal, a mark rate modulation scheme that modulates a mark rate of binary data with a supervisory signal during non-service, or a parity violation scheme that causes a parity violation in communication data with a supervisory signal at the time of service is provided. is there.
【0003】[0003]
【発明が解決しようとする課題】このような従来の監視
信号検出方式における監視信号の重畳方式において、マ
ーク率変調方式はサービス状態では適用できず、またパ
リティバイオレーション方式は符号誤りが低い、などの
欠点がある。SUMMARY OF THE INVENTION Such conventional monitoring
In the superimposition method of the monitoring signal in the signal detection method , the mark rate modulation method has a drawback that it cannot be applied in the service state, and the parity violation method has a low code error.
【0004】[0004]
【課題を解決するための手段】本発明による監視信号検
出方式は、主信号である第1の2値の電気信号の基本周
期よりは長い周期で変化する第1の監視信号の有無に応
じて前記第1の2値の電気信号を振幅変調しかつ光信号
に変換して送信された2値の光信号を受信し光信号から
電気信号に変換して第2の2値の電気信号として出力す
る光受信手段と、前記光受信手段からの前記第2の2値
の電気信号にもとづき前記第1の2値の電気信号の基本
周期と同じ周期のクロック信号を再生するタイミング発
生手段と、前記光受信手段からの前記第2の2値の電気
信号を前記タイミング発生手段からの前記クロック信号
により識別して前記振幅変調される前の前記第1の2値
の電気信号に対応した第3の2値の電気信号として再生
出力する識別再生手段と、前記光受信手段出力の前記第
2の2値の電気信号の平均電圧を検出して第1の平均電
圧信号として出力する第1の平均電圧検出手段と、前記
識別再生手段出力の前記第3の2値の電気信号の平均電
圧を検出して第2の平均電圧信号として出力する第2の
平均電圧検出手段と、前記第1の平均電圧検出手段から
の前記第1の平均電圧信号と前記第2の平均電圧検出手
段からの前記第2の平均電圧信号とを比較して前記第1
の監視信号に対応する第2の監視信号を検出する信号比
較手段とを備える。 According to the present invention, there is provided a monitoring signal detecting method according to the present invention.
The output method is based on the basic cycle of the first binary electric signal which is the main signal.
Response to the presence of the first monitoring signal that changes in a cycle longer than the
Amplitude-modulating the first binary electric signal and generating an optical signal
Receives the binary optical signal transmitted by converting to
Convert to an electrical signal and output as a second binary electrical signal
Light receiving means, and the second binary from the light receiving means
Of the first binary electric signal based on the electric signal
Generates a timing to reproduce a clock signal with the same cycle as the cycle
Generating means, and the second binary electricity from the light receiving means.
A clock signal from the timing generating means;
The first binary before being amplitude modulated, identified by
As a third binary electric signal corresponding to the electric signal
Identification reproducing means for outputting, and the
2 to detect the average voltage of the binary electric signal,
First average voltage detecting means for outputting as a pressure signal;
Average electric power of the third binary electric signal output from the identification reproducing means.
A second average voltage signal detected and output as a second average voltage signal.
Average voltage detection means, and the first average voltage detection means
The first average voltage signal and the second average voltage detection means
Comparing the second average voltage signal from the first stage to the first
Signal ratio for detecting a second monitor signal corresponding to the monitor signal of
Comparing means.
【0005】[0005]
【実施例】次に本発明について図面を参照して説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.
【0006】図1は本発明の一実施例のブロック図であ
り、図2は本実施例の動作を例示する信号波形図であ
る。図1を参照すると、本発明による監視信号検出方式
は、主信号である第1の2値の電気信号の基本周期より
は長い周期で変化する監視信号の有無に応じて第1の2
値の電気信号を振幅変調しかつ光信号に変換して送信さ
れた2値の光信号を受信し光信号から電気信号に変換し
て第2の2値の電気信号として信号aを出力する光受信
回路1と、光受信回路1からの第2の2値の電気信号で
ある信号aにもとづき第1の2値の電気信号の基本周期
と同じ周期のクロック信号を再生するタイミング回路2
と、光受信回路1からの第2の2値の電気信号である信
号aをタイミング回路2からのクロック信号により識別
して振幅変調される前の第1の2値の電気信号に対応し
た第3の2値の電気信号である信号bを再生出力する識
別回路3と、光受信回路1出力の第2の2値の電気信号
である信号aの平均電圧を検出して第1の平均電圧信号
としての信号cを出力する平均電圧検出回路4と、識別
回路3出力の第3の2値の電気信号である信号bの平均
電圧を検出して第2の平均電圧信号としての信号d出力
する平均電圧検出回路5と、平均電圧検出回路4からの
第1の平均電圧信号である信号cと平均電圧検出回路5
からの第2の平均電圧信号である信号dとを比較して第
1の2値の電気信号を振幅変調した送信側の監視信号e
を検出して出力する比較回路6と、比較回路6からの監
視信号eにより動作する監視回路7とから構成される。
次に図2を図1と併せて参照して動作について説明す
る。本実施例では、受信して監視信号を検出する対象と
する信号は、送信側にて2値光信号に監視信号を重畳す
るとき、光パルス信号の振幅を増大して伝送された光信
号を対象としている。受信側では、この振幅重畳した光
信号を光受信回路1で電気信号に変換したあと、タイミ
ング回路2で再生したクロックにより識別回路3で識別
再生する。光受信回路1が出力する信号aは、図2に示
すように、時刻A以前の監視信号非送出時と、時刻A以
降の監視信号送出時とでパルス振幅P1とP2とが異
る。一方、識別回路3が出力する信号bは、パルス振幅
が一定である。従って、平均電圧検出回路4の出力する
信号Cのレベルは、監視信号の有無により変動するが、
平均電圧検出回路5が出力する信号dのレベルは一定で
ある。この信号c,dの両レベルを比較回路6で比較す
ることにより、信号eを得て監視信号を復調でき、監視
回路を動作させる。FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a signal waveform diagram illustrating the operation of the present embodiment. Referring to FIG. 1, a monitoring signal detection method according to the present invention
Is greater than the fundamental period of the first binary electrical signal which is the main signal.
Is the first 2 depending on the presence or absence of a monitoring signal that changes in a long cycle.
Value electrical signal is amplitude modulated and converted to an optical signal for transmission.
Receiving the binary optical signal and converting the optical signal to an electrical signal.
Receiving a signal a as a second binary electrical signal
Circuit 1 and the second binary electric signal from the optical receiving circuit 1
Basic period of a first binary electric signal based on a certain signal a
Circuit 2 that reproduces a clock signal having the same cycle as
And a signal which is a second binary electric signal from the optical receiving circuit 1.
Signal a is identified by the clock signal from the timing circuit 2.
Corresponding to the first binary electric signal before being amplitude-modulated
For reproducing and outputting the signal b which is the third binary electric signal.
Another circuit 3 and a second binary electric signal output from the optical receiving circuit 1
To detect a first average voltage signal
An average voltage detection circuit 4 that outputs a signal c
Average of signal b, which is the third binary electrical signal output from circuit 3
Detecting a voltage and outputting a signal d as a second average voltage signal
From the average voltage detection circuit 5 and the average voltage detection circuit 4
Signal c as a first average voltage signal and average voltage detection circuit 5
From the second average voltage signal d.
Monitor signal e on the transmission side obtained by amplitude-modulating the binary electric signal of 1
Circuit 6 for detecting and outputting
And a monitoring circuit 7 operated by the visual signal e.
Next, the operation will be described with reference to FIG.
You. In this embodiment, the target for receiving and detecting the monitoring signal is
Signal, when superimposing the supervisory signal on the binary optical signal at the transmission side, Mitsunobu which increases the amplitude of the optical pulse signal is sent Den
No. that is intended for. On the receiving side, the optical signal on which the amplitude is superimposed is converted into an electric signal by the optical receiving circuit 1 and then discriminated and reproduced by the discriminating circuit 3 using the clock reproduced by the timing circuit 2. As shown in FIG. 2, the signal a output from the optical receiving circuit 1 has different pulse amplitudes P1 and P2 between when the monitoring signal is not transmitted before time A and when the monitoring signal is transmitted after time A. On the other hand, the signal b output from the identification circuit 3 has a pulse amplitude
Is constant. Therefore, the level of the signal C output from the average voltage detection circuit 4 varies depending on the presence or absence of the monitoring signal.
The level of the signal d output from the average voltage detection circuit 5 is constant. By comparing both levels of the signals c and d by the comparison circuit 6, the signal e can be obtained and the monitoring signal can be demodulated, and the monitoring circuit is operated.
【0007】[0007]
【発明の効果】以上説明したように本発明によれば、監
視信号により光信号振幅を変化させて伝送された光信号
を、受信側で平均振幅を検出して監視信号を再生するこ
とにより、サービス状態でも監視信号を伝送可能であ
り、かつ符号誤り耐力を劣化させず済む。As described above, according to the present invention, an optical signal transmitted by changing an optical signal amplitude by a monitoring signal is transmitted.
By detecting the average amplitude on the receiving side and reproducing the monitor signal, the monitor signal can be transmitted even in the service state, and the code error tolerance does not deteriorate.
【図1】本発明の実施例のブロック図。FIG. 1 is a block diagram of an embodiment of the present invention.
【図2】本発明の実施例の信号波形図。FIG. 2 is a signal waveform diagram according to the embodiment of the present invention.
1 光受信回路 2 タイミング回路 3 識別回路 4,5 平均電圧検出回路 6 比較回路 7 監視回路 DESCRIPTION OF SYMBOLS 1 Optical receiving circuit 2 Timing circuit 3 Identification circuit 4, 5 Average voltage detection circuit 6 Comparison circuit 7 Monitoring circuit
Claims (1)
本周期よりは長い周期で変化する第1の監視信号の有無
に応じて前記第1の2値の電気信号を振幅変調しかつ光
信号に変換して送信された2値の光信号を受信し光信号
から電気信号に変換して第2の2値の電気信号として出
力する光受信手段と、 前記光受信手段からの前記第2の2値の電気信号にもと
づき前記第1の2値の電気信号の基本周期と同じ周期の
クロック信号を再生するタイミング発生手段と、 前記光受信手段からの前記第2の2値の電気信号を前記
タイミング発生手段からの前記クロック信号により識別
して前記振幅変調される前の前記第1の2値の電気信号
に対応した第3の2値の電気信号として再生出力する識
別再生手段と、 前記光受信手段出力の前記第2の2値の電気信号の平均
電圧を検出して第1の平均電圧信号として出力する第1
の平均電圧検出手段と、 前記識別再生手段出力の前記第3の2値の電気信号の平
均電圧を検出して第2の平均電圧信号として出力する第
2の平均電圧検出手段と、 前記第1の平均電圧検出手段からの前記第1の平均電圧
信号と前記第2の平均電圧検出手段からの前記第2の平
均電圧信号とを比較して前記第1の監視信号に対応する
第2の監視信号を検出する信号比較手段と を備えること
を特徴とする監視信号検出方式。 (1)Base of the first binary electric signal which is the main signal
Presence / absence of the first monitoring signal that changes in a cycle longer than this cycle
Amplitude modulates the first binary electric signal according to
Receives a binary optical signal that has been converted to a signal and transmitted
To an electrical signal and output as a second binary electrical signal.
Light receiving means for powering; Based on the second binary electric signal from the optical receiving means
Of the same period as the basic period of the first binary electric signal.
Timing generating means for reproducing a clock signal; The second binary electric signal from the optical receiving means
Identification by the clock signal from the timing generation means
The first binary electric signal before being subjected to the amplitude modulation
For reproducing and outputting as a third binary electric signal corresponding to
Another reproduction means, Average of the second binary electric signal output from the light receiving means
A first detecting means for detecting a voltage and outputting it as a first average voltage signal;
Average voltage detecting means, The average of the third binary electric signal output from the discrimination / reproduction means.
Detecting the average voltage and outputting it as a second average voltage signal.
2 mean voltage detecting means; The first average voltage from the first average voltage detection means
Signal and the second average signal from the second average voltage detecting means.
Comparing with the equalized voltage signal and corresponding to the first monitoring signal.
Signal comparing means for detecting a second monitoring signal; Having
A monitoring signal detection method characterized by the following.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6964991A JP2616508B2 (en) | 1991-04-02 | 1991-04-02 | Monitoring signal detection method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6964991A JP2616508B2 (en) | 1991-04-02 | 1991-04-02 | Monitoring signal detection method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05244046A JPH05244046A (en) | 1993-09-21 |
JP2616508B2 true JP2616508B2 (en) | 1997-06-04 |
Family
ID=13408905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6964991A Expired - Lifetime JP2616508B2 (en) | 1991-04-02 | 1991-04-02 | Monitoring signal detection method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2616508B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6772695B2 (en) | 2016-09-13 | 2020-10-21 | 富士通株式会社 | Transmission equipment, transmission system, and data detection method |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS564949A (en) * | 1979-06-26 | 1981-01-19 | Fujitsu Ltd | Transmission system for previous-arrangement supervisory signal |
-
1991
- 1991-04-02 JP JP6964991A patent/JP2616508B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH05244046A (en) | 1993-09-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2785741B2 (en) | Monitoring system for all-optical regenerator | |
JP2616508B2 (en) | Monitoring signal detection method | |
JP3455621B2 (en) | Communication device | |
JPH07326139A (en) | Recorded and coded digital-signal reproducing apparatus | |
US5231394A (en) | Signal reproducing method | |
CA1324218C (en) | Zero string error detection circuit | |
JP2562093B2 (en) | Ternary signal transmission method using optical transmission pulse | |
JP2705625B2 (en) | Optical fiber cable break detection method | |
JP2888011B2 (en) | Pulse communication method | |
JPH07288502A (en) | Frame synchronization optical transmission system | |
JPH0716169B2 (en) | Optical repeater | |
JPH01292927A (en) | Data transmitting system | |
JP2950171B2 (en) | Reception alarm circuit and regenerative repeater | |
JPH08191269A (en) | Optical communication system | |
JPH01290335A (en) | Auxiliary signal transmission system | |
JPH0528547B2 (en) | ||
JPH0715477A (en) | Triangle wave transmission method | |
JPS63193624A (en) | Light receiving device | |
JP2004336200A (en) | Burst signal start detection circuit, optical receiver, and optical transmission system | |
JPH0740697B2 (en) | Identification circuit | |
JPS59204352A (en) | Optical receiver | |
JPH0317421B2 (en) | ||
JP2006352679A (en) | Optical transmission and reception system and optical receiving circuit | |
JPH02281849A (en) | Optical signal transmitter and receiver | |
JPH02145045A (en) | Optical repeater |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19970114 |