JPS63221725A - Optical transmission system - Google Patents
Optical transmission systemInfo
- Publication number
- JPS63221725A JPS63221725A JP62054256A JP5425687A JPS63221725A JP S63221725 A JPS63221725 A JP S63221725A JP 62054256 A JP62054256 A JP 62054256A JP 5425687 A JP5425687 A JP 5425687A JP S63221725 A JPS63221725 A JP S63221725A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- cmi
- optical
- sent
- optical repeater
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 30
- 230000005540 biological transmission Effects 0.000 title claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、端局側に光入力信号異常を検出して回線を切
替える切替装置を有する光中継器を含む光伝送系の伝送
方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmission system for an optical transmission system including an optical repeater having a switching device on a terminal station side that detects an optical input signal abnormality and switches lines.
〔従来の技術及び発明が解決しようとする問題点〕第２
図に示すような両端局に監視装置を接続した構成を取っ
た場合を説明する。ここでは１対１の切替えを示してお
り、端局９から端局１０に送出される信号は全く同一で
あり、端局９では端局１０からの受信信号だけを切替え
る。[Problems to be solved by conventional technology and invention] Part 2
A case will be described in which a configuration in which monitoring devices are connected to both terminal stations as shown in the figure is adopted. Here, one-to-one switching is shown, in which the signals sent from terminal station 9 to terminal station 10 are exactly the same, and only the signal received from terminal station 10 is switched at terminal station 9.
今、仮にＡ点で回線が切断された場合を想定すると、光
中継器２でＡＩＳ （Ａｌａｍ Ｉｎｄｉｃａｔｉｏｎ
Ｓｉｇｎａｌ ）信号を送出しない場合、光中継器２
より右側の回線は全部信号が断になる。それ故、監視信
号を主信号と同一の回線で伝送している時には、端局１
０側の監視装置１０３から光中継器２にポーリングが行
なえなくなる。したがって、第２図の構成では光中継器
の監視を行なうために必ず光中継器でもＡＩＳ信号を送
出する必要が生ずる。ところが、オール”１″のＡＩＳ
信号を用いると、端局１０では端局９からのＡＩＳ信号
と区別ができなくなるので１図中、光中継器２より左側
の回線が断になった場合には１回線が切替らないという
欠点がある。Now, assuming that the line is disconnected at point A, optical repeater 2 will use AIS (Alam Indication)
Signal) If the signal is not sent, the optical repeater 2
All lines on the right side lose signal. Therefore, when the supervisory signal is transmitted on the same line as the main signal,
It becomes impossible to poll the optical repeater 2 from the monitoring device 103 on the 0 side. Therefore, in the configuration shown in FIG. 2, in order to monitor the optical repeater, the optical repeater must also send out an AIS signal. However, all “1” AIS
If the signal is used, the terminal station 10 cannot distinguish it from the AIS signal from the terminal station 9, so if the line on the left side of the optical repeater 2 in Figure 1 is disconnected, one line will not be switched. There is.
一方、伝送路符号としてＣＭＩ符号を使用すると。On the other hand, if a CMI code is used as a transmission line code.
監視信号をＣＭＩ符号則違反を利用して副情報として主
信号に重畳できるので、主信号と同一の伝送路で伝送で
きる利点がある。しかし、光中継器でＣＭＩ符号をもと
のデータ信号に変換してから副情報の分離と重畳を行な
うので、光中継器の入力信号から検出された伝送路誤り
が次局に伝搬しなくなる。したがって９例えば図中、光
中継器２より左側の回線で発生した伝送路誤りは端局１
ｏ側で検出できず１回線が切替らないという問題もある
。Since the supervisory signal can be superimposed on the main signal as sub information by using CMI coding rule violation, there is an advantage that it can be transmitted on the same transmission path as the main signal. However, since the optical repeater converts the CMI code into the original data signal and then separates and superimposes the sub information, transmission path errors detected from the input signal of the optical repeater are not propagated to the next station. Therefore, 9. For example, in the figure, a transmission line error that occurs on the line to the left of optical repeater 2 is caused by terminal station 1.
There is also the problem that one line cannot be switched because it cannot be detected on the o side.
以上のような問題点を解消するため９本発明では、光中
継器の入力信号断の場合、 ＡＩＳ信号としてオール″
１”以外の固定パターンを伝送する手段と、光中継器入
力で伝送路誤りが検出された場合、誤シ情報を次局に伝
送する手段を有することを特徴とする。In order to solve the above-mentioned problems, in the present invention, when the input signal of the optical repeater is cut off, all "
The present invention is characterized by having means for transmitting a fixed pattern other than 1", and means for transmitting error information to the next station when a transmission path error is detected at the optical repeater input.
次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示す。本図は光中継器のブ
ロック図で２片方向だけを示している。FIG. 1 shows an embodiment of the invention. This figure is a block diagram of an optical repeater, showing only two directions.
光中継器は大別して光−電気変換部１１．ＣＭＩ復号部
１２．選択回路１３−１．１３−２．発振器１４、副情
報多重化／分離回路１５ 、 ＣＭＩ符号化部１６．電
気−光変換部１７．及びフリップフロップＦ／Ｆで構成
されている。The optical repeater is roughly divided into an optical-to-electrical converter 11. CMI decoding section 12. Selection circuit 13-1.13-2. Oscillator 14, sub information multiplexing/separating circuit 15, CMI encoding section 16. Electrical-optical converter 17. and a flip-flop F/F.
光入力信号１８は光−電気変換部１１で電気信号に変換
された後、 ＣＭＩ信号１９とクロック信号２０として
出力され、 ＣＭＩ復号部１２に送られる。The optical input signal 18 is converted into an electrical signal by the optical-to-electrical converter 11, and then outputted as a CMI signal 19 and a clock signal 20, and sent to the CMI decoder 12.
ＣＭＩ復号部１２でデータ信号２１とクロック信号２３
、誤り情報信号２５．副情報信号２８に分離される。デ
ータ信号２１とクロック信号２３はそれぞれ１選択回路
１３−１．１３−２を通った後。The CMI decoding unit 12 receives the data signal 21 and the clock signal 23.
, error information signal 25. The sub information signal 28 is separated. After the data signal 21 and the clock signal 23 have passed through the 1 selection circuits 13-1 and 13-2, respectively.
ＣＭＩ符号化部１６に送られる。選択回路１３−１゜１
３−２ではそれぞれ、光−電気変換部１１で入力信号断
が検出された場合に、データ信号２１をフリップフロッ
プＦ／Ｆからの固定ノぐターン２２に。It is sent to the CMI encoding section 16. Selection circuit 13-1゜1
3-2, when an input signal disconnection is detected in the optical-to-electrical converter 11, the data signal 21 is sent to the fixed output terminal 22 from the flip-flop F/F.
クロック信号２３を発振器１４からのクロック信号２４
にそれぞれ切替える。実施例では、固定パターンは１０
１０・・・になっておシ、端局側でのパターン検出が比
較的容易である。The clock signal 23 is converted into a clock signal 24 from the oscillator 14.
Switch to each. In the example, the fixed pattern is 10
10..., pattern detection on the terminal station side is relatively easy.
誤り情報信号２５はそのままＣＭＩ符号化部１６に送ら
れ、符号則違反を用いて主信号に重畳されて次局へ送出
される。したがって誤り情報信号を重畳してもデータ信
号の内容が変化することはない。The error information signal 25 is sent as is to the CMI encoder 16, superimposed on the main signal using a coding rule violation, and sent to the next station. Therefore, even if an error information signal is superimposed, the content of the data signal does not change.
副情報信号２８は９通常は何種類かの副情報が多重化さ
れているので、副情報多重化／分離回路１５で各副情報
信号３０に分離された後、何らかの処理を施されて再び
多重化され、 ＣＭＩ符号化部１６に送られる。ＣＭＩ
符号化部１６から出力されたＣＭＩ信号１９とクロック
信号２０は電気−光変換部１７で光信号に変換され、光
出力信号３２として伝送路に送出される。Since the sub information signal 28 is usually multiplexed with several types of sub information, it is separated into each sub information signal 30 by the sub information multiplexing/demultiplexing circuit 15, and then subjected to some processing and multiplexed again. and sent to the CMI encoding section 16. CMI
The CMI signal 19 and clock signal 20 output from the encoder 16 are converted into optical signals by the electro-optical converter 17, and sent to the transmission line as an optical output signal 32.
以上説明してきた通り１本発明では、光中継器からＡＩ
Ｓ信号としてオール“１”以外の固定ノ４ターンを送出
すると共に、光中継器の入力側で検出された伝送路部シ
を主信号に重畳して次局に伝送することによシ、端局側
で伝送路障害を全て検出して回線切替を確実に行うこと
ができる。As explained above, in the present invention, AI
By sending out 4 fixed turns other than all "1" as the S signal, and superimposing the transmission line part S detected at the input side of the optical repeater on the main signal and transmitting it to the next station, All transmission path failures can be detected on the station side and line switching can be performed reliably.
以下今日Below today
第１図は本発明の実施例の光中継器ブロック図。
第２図は光伝送系の回線構成図である。
１．２．３．４・・・光中継器、１１・・・光−電気変
換部、１２・・・ＣＭＩ復号部、１３−１．１３−２・
・・選択回路、１４・・・発振器、１５・・・副情報多
重化／分離回路、１６・・・ＣＭＩ復号化部、１７・・
・電気−光変換部。
／″−ゝ、
代理人（７７８３）弁理士池田憲保に’：：゛ご−・FIG. 1 is a block diagram of an optical repeater according to an embodiment of the present invention. FIG. 2 is a line configuration diagram of an optical transmission system. 1.2.3.4... Optical repeater, 11... Optical-electrical converter, 12... CMI decoder, 13-1.13-2.
... Selection circuit, 14... Oscillator, 15... Sub information multiplexing/separation circuit, 16... CMI decoding section, 17...
・Electricity-optical conversion section. /''-ゝ、Representative (7783) Patent attorney Noriyasu Ikeda'::゛go-・
Claims (1)
において、光中継器の入力信号断の場合、ＡＩＳ信号と
してオール“１”以外の固定パターンを伝送する手段と
、光中継器入力で伝送路誤りが検出された場合、誤り情
報を次局に伝送する手段を有することを特徴とする光伝
送方式。1. In an optical transmission system including an optical repeater having a switching device on the terminal side, a means for transmitting a fixed pattern other than all "1" as an AIS signal when the input signal of the optical repeater is cut off; An optical transmission system characterized by having means for transmitting error information to the next station when a transmission path error is detected at the input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62054256A JPH0797761B2 (en) | 1987-03-11 | 1987-03-11 | Optical transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62054256A JPH0797761B2 (en) | 1987-03-11 | 1987-03-11 | Optical transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63221725A true JPS63221725A (en) | 1988-09-14 |
| JPH0797761B2 JPH0797761B2 (en) | 1995-10-18 |
Family
ID=12965475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62054256A Expired - Lifetime JPH0797761B2 (en) | 1987-03-11 | 1987-03-11 | Optical transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0797761B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5144469A (en) * | 1988-06-03 | 1992-09-01 | Ke Kommunications Elektronik Gmbh & Co. | Method for the transmission of data between two stations by means of optical waveguides |
| JP2005167935A (en) * | 2003-12-05 | 2005-06-23 | Fujitsu Ltd | Optical transmission device and optical transmission system |
| JP2008078749A (en) * | 2006-09-19 | 2008-04-03 | Furukawa Electric Co Ltd:The | Optical repeater and optical transmission system |
| JP2012160938A (en) * | 2011-02-01 | 2012-08-23 | Nec Corp | Path switching control system and path switching control method |
| CN106506060A (en) * | 2016-11-07 | 2017-03-15 | 南京理工大学 | Based on the spaceborne AIS collision signals separation method for improving independent component analysis |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60169246A (en) * | 1984-02-13 | 1985-09-02 | Fujitsu Ltd | Supervisory system of optical wavelength multiplex transmission system |
| JPS60229556A (en) * | 1984-04-27 | 1985-11-14 | Nec Corp | Locating system for fault point on digital light signal transmission line |
-
1987
- 1987-03-11 JP JP62054256A patent/JPH0797761B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60169246A (en) * | 1984-02-13 | 1985-09-02 | Fujitsu Ltd | Supervisory system of optical wavelength multiplex transmission system |
| JPS60229556A (en) * | 1984-04-27 | 1985-11-14 | Nec Corp | Locating system for fault point on digital light signal transmission line |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5144469A (en) * | 1988-06-03 | 1992-09-01 | Ke Kommunications Elektronik Gmbh & Co. | Method for the transmission of data between two stations by means of optical waveguides |
| JP2005167935A (en) * | 2003-12-05 | 2005-06-23 | Fujitsu Ltd | Optical transmission device and optical transmission system |
| JP4516739B2 (en) * | 2003-12-05 | 2010-08-04 | 富士通株式会社 | Optical transmission device and optical transmission system |
| JP2008078749A (en) * | 2006-09-19 | 2008-04-03 | Furukawa Electric Co Ltd:The | Optical repeater and optical transmission system |
| JP2012160938A (en) * | 2011-02-01 | 2012-08-23 | Nec Corp | Path switching control system and path switching control method |
| CN106506060A (en) * | 2016-11-07 | 2017-03-15 | 南京理工大学 | Based on the spaceborne AIS collision signals separation method for improving independent component analysis |
| CN106506060B (en) * | 2016-11-07 | 2019-06-21 | 南京理工大学 | Based on the spaceborne AIS collision signal separation method for improving independent component analysis |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0797761B2 (en) | 1995-10-18 |
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