[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

JPS58177041A - Optical transmission system - Google Patents

Optical transmission system

Info

Publication number
JPS58177041A
JPS58177041A JP57059936A JP5993682A JPS58177041A JP S58177041 A JPS58177041 A JP S58177041A JP 57059936 A JP57059936 A JP 57059936A JP 5993682 A JP5993682 A JP 5993682A JP S58177041 A JPS58177041 A JP S58177041A
Authority
JP
Japan
Prior art keywords
optical transmission
transmission line
star
loop
failure
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.)
Pending
Application number
JP57059936A
Other languages
Japanese (ja)
Inventor
Kazunari Kiyota
清田 一成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP57059936A priority Critical patent/JPS58177041A/en
Publication of JPS58177041A publication Critical patent/JPS58177041A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27Arrangements for networking
    • H04B10/272Star-type networks or tree-type networks
    • H04B10/2725Star-type networks without a headend
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27Arrangements for networking

Landscapes

  • Engineering & Computer Science (AREA)
  • Computing Systems (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To continue processing without stopping the operation of an optical transmitter entirly even at a mutliplex failure, by providing a star shaped optical transmission line as a waiting system, and bypassing a faulty point with the star optical transmission line even at a failure of a loop optical transmission line of a common use system. CONSTITUTION:Plural optical transmission line terminals 1-7 are coupled with loop optical transmission line branches 8-14 to form a unidirectional loop optical transmission line as a whole and this loop optical transmission line is used as the common use system normally. A star coupler 22 is connected to the optical transmission line terminals 1-7 to the present system via star optical transmission line branches 15-21 respectively to form the star optical transmission line as a whole. The star optical transmission line is used as the waiting system, and even if a failure takes place in the loop optical transmission line of the present system, the failed point is bypassed with the star optical transmission line, and the processing is continued without stopping the entire operation even at a multiplex fialure.

Description

【発明の詳細な説明】 本発明は光通信方式に関し、木に障害発生時における光
伝送路のバイパス方式に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical communication system, and more particularly to a bypass system for an optical transmission line when a tree failure occurs.

従来、この種の光伝送方式においては、ループ形光伝送
路を机川系のものと待機系のものと2Mに設けて、机川
系の障害時、待機系に切シ換える方式や、障害点の前段
と後段の光伝送終端末で現。
Conventionally, in this type of optical transmission system, a loop type optical transmission line is provided in 2M, one for the cableway system and one for the standby system, and when a failure occurs in the cableway system, the system is switched to the standby system. It is present at the optical transmission terminals before and after the point.

細糸と待機系との間を移9変わってこれを折シ返すルー
プバック方式勢があるが、2m障害が起った場合、糸の
保−をする手段がなく、光通信装置システムの動作不能
となっていた。
There is a loopback system that transfers between the fine thread and the standby system and returns it, but if a 2m failure occurs, there is no means to protect the thread, and the operation of the optical communication equipment system will be affected. It had become impossible.

本発明の目的は、待機系としてスター形光伝送路′1r
W!iけ、埃用系のループ形光伝送路の障害時、障害点
をスター形光伝送路でバイパスすることにより上記欠点
を解決し、多重障害発生時にも系の処理を可能にする光
伝送方式を提供することにあるO 本発明の構成について述べると、本発明は、埃用系とし
てのループ形光伝送路上、待機系としてのスター形光伝
送路を肩する光伝送方式において。
The object of the present invention is to provide a star-shaped optical transmission line '1r as a standby system.
W! An optical transmission system that solves the above drawbacks by bypassing the failure point with a star-shaped optical transmission line when there is a failure in the loop-type optical transmission line of the dust system, and enables the system to process even when multiple failures occur. To describe the configuration of the present invention, the present invention is an optical transmission system that supports a loop-type optical transmission line as a dust system and a star-type optical transmission line as a standby system.

前記ループ形光伝送路およびまたは光伝送終端末の障害
時、障害点の前段の光伝送終端末と前記障害点の後段の
光伝送終端末との間をスター形光伝送路で結合させるこ
とを%黴とする光伝送方式である。
When a failure occurs in the loop optical transmission line and/or the optical transmission terminal, the optical transmission terminal preceding the failure point and the optical transmission termination terminal succeeding the failure point are coupled by a star optical transmission line. This is an optical transmission method that uses % mold.

以下本発明を実施例によシ図面の簡単な説明する。Hereinafter, the present invention will be briefly explained using examples and drawings.

第1図は本発明の一実施例を示すブロック図である。本
発明は桧数個の光体送路端末から構成されるが、ここで
は7つの光体送路端末1〜7で代表させるものとする。
FIG. 1 is a block diagram showing one embodiment of the present invention. Although the present invention is composed of several optical path terminals, seven optical path terminals 1 to 7 are representative here.

第1図において、光伝送路端禾1と光伝送路端禾2とは
ループ形光伝送路ブランチ8で結合されている。111
11.1様に光体送路端末2〜7は、それぞれI@着に
ループ形光伝送路ブランチ9〜13で結合され、最終的
に光体送路端末1へ接続され、全体としては片方向ルー
プ形光伝送路を構成している。また、もう1つの光伝送
路として、光体送路端末1はスター形光伝送路ブランチ
15を介してスターカップラ22に接続され、同様に光
体送路端末2〜7もまたスター形光伝送路ブランチ16
〜21により前記のスターカップラ22に′i&続され
、全体とトてスター形光伝送路をwI成している。そし
て通常はループ形光伝送路は現用系として使われており
、スター形光伝送路は待機ホとして動作を停止している
In FIG. 1, an optical transmission line end wire 1 and an optical transmission line end wire 2 are coupled by a loop-shaped optical transmission line branch 8. As shown in FIG. 111
11.1, the optical transmission line terminals 2 to 7 are connected to the I@ terminals by loop type optical transmission line branches 9 to 13, and finally connected to the optical transmission line terminal 1, and the optical transmission line terminals 2 to 7 are connected to the optical transmission line terminal 1 as a whole. It constitutes a directional loop type optical transmission line. Further, as another optical transmission line, the optical transmission line terminal 1 is connected to a star coupler 22 via a star optical transmission line branch 15, and similarly, the optical transmission line terminals 2 to 7 are also connected to a star optical transmission line. ro branch 16
21 are connected to the star coupler 22, and together form a star-shaped optical transmission line wI. Usually, the loop optical transmission line is used as a working system, and the star optical transmission line is inactive as a standby system.

第2図はループ形光伝送路ブランチ10が切断障害奮起
こした時の光伝送ktlt、のデータ信号の径のデータ
フォーマ、ト及び入力断を常時監視しているが、この時
光伝送路端末4は光信号の入力断音検出し、待機糸のス
ター形光伝送路を通して前段の光体送路端末3に系の切
シ換え要求を行なう。
FIG. 2 shows the data former of the data signal diameter of the optical transmission ktlt when the loop type optical transmission line branch 10 suffers from a disconnection failure, and the input disconnection is constantly monitored. detects an interruption in the input of the optical signal, and issues a system switching request to the optical body transmission path terminal 3 in the previous stage through the star-shaped optical transmission path of the standby thread.

その光体送路泡末3はこれを受け、スター形光伝送路ブ
ランチ17を用いて伝送路端末4に向けて時間スター形
伝送路ブランチ18からの応答データを監視する。ここ
でデータが入力され、データが1冨であることを確認し
、後段の光体送路端末5に向けてループ形光伝送路ブラ
ンチ11を用いて送信を始めると共に、全光伝送路端末
あてに光体送路端末3との間でバイパス路を形成したこ
とを宣百する。よってループ形光伝送路がスター形光伝
送路ブランチ17.18を用いて成立する。
In response to this, the optical transmission line end 3 uses the star optical transmission line branch 17 to monitor the response data from the time star transmission line branch 18 toward the transmission line terminal 4. Here, the data is input, it is confirmed that the data is 1 value, and transmission is started using the loop type optical transmission line branch 11 toward the optical transmission line terminal 5 at the subsequent stage, and the data is sent to all optical transmission line terminals. It is declared that a bypass path has been formed between the light body path terminal 3 and the light beam path terminal 3. Therefore, a loop-shaped optical transmission line is established using star-shaped optical transmission line branches 17 and 18.

第3図は第2図で示した障害の他に光体送路端末6が2
1障害を匙こした時の光伝送装置のデータ信号の径路図
を示す。第2図と同様に記号は第1図と対応している。
FIG. 3 shows that in addition to the obstacles shown in FIG.
1 shows a route diagram of a data signal in an optical transmission device when one failure occurs. As in FIG. 2, the symbols correspond to those in FIG.

さてスター形光伝送路では、伝送路がすべての光体送路
端末で共鳴されることから、伝送路の時間的使用率を任
意に選定できるデマンドアサイン方式がとられている。
Now, in a star-shaped optical transmission line, since the transmission line resonates at all the optical transmission line terminals, a demand assignment method is used in which the temporal usage rate of the transmission line can be arbitrarily selected.

ここではあらかじめ設定された時間の1周期を′Pとす
ると、1つの障害に対してT−a時間(aは送信要求信
号付加時間)が与えられる。2つの障害に対しては、そ
れぞれ(T−aン2時間が与えられ、一般的にnの障害
に対して(T−a)/nの時間が与えられる。
Here, if one preset period of time is 'P', a time Ta (a is the transmission request signal addition time) is given to one failure. For two failures, each is given (T-a) 2 hours, and generally for n failures, (T-a)/n time is given.

光体送路端末7では、前段の光体送路端末6からのデー
タを常時監視し、異常の場合、送信要求信号付加時間a
の間に光伝送方式用6ヘスター形伝送路への切り候え要
求をスター形光伝送路ブランチ21を介して行ない、所
定の時間光伝送路端禾6からのデータを待つ。応答がな
い場合、その前段の光体送路端末5へ同様にスター形伝
送路への切り換え要求をする。同様にして応答があるま
でこれは繰シ返される。そして応答があった場合、第2
図での障害後出と同様に全光伝送路端末あてに、ここで
は、光体送路端末5との間でバイパス路を形成したこと
を百肖する。この宣1を認識した他のバイパス路を形成
している光体送路端末3゜4は、所定の手順でデータ送
出時間をT−aがら(’I’−aン2へ変更する。これ
を確認した光伝送方式用5,7.は、あきの(T−aし
2の時間を用いてデータの伝送を始める。このようにし
て、スター形光伝送路ブランチ17.18,19.21
を用いてループ形光伝送路が形成される。
The optical transmission path terminal 7 constantly monitors the data from the optical transmission path terminal 6 at the previous stage, and in case of an abnormality, the transmission request signal addition time a
During this period, a request for switching to the 6-Hester type optical transmission line is made via the star type optical transmission line branch 21, and data from the optical transmission line end 6 is waited for a predetermined period of time. If there is no response, a similar request is made to the optical transmission line terminal 5 at the preceding stage to switch to the star transmission line. This process is repeated in the same way until a response is received. and if there is a response, the second
As in the case after the failure in the figure, it will be explained here that a bypass path was formed between the optical transmission line terminal 5 and the optical transmission line terminal 5. Recognizing this declaration 1, the light transmission path terminal 3-4 forming the other bypass path changes the data transmission time from T-a to ('I'-a-2) according to a predetermined procedure. After confirming the above, the optical transmission systems 5 and 7 start data transmission using the time of Akino (T-a and 2.) In this way, the star-shaped optical transmission line branches 17, 18, 19,
A loop-type optical transmission line is formed using

以上に説明したように、本発明によれば、障害発生時ス
ター形光伝送路をループ形光伝送路の一部として使用す
ることによ勺、多1障害においても光伝送装置全体の動
作停止とならず、処理を継続することができる利点があ
る。
As explained above, according to the present invention, by using a star optical transmission line as a part of a loop optical transmission line when a failure occurs, the operation of the entire optical transmission equipment can be stopped even in the event of multiple failures. This has the advantage that the process can be continued.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の光伝送方式用の装置の一実施例を示す
プロ、り図、第2図、第3図はそれぞれば「 楢2圀 第3 圀
FIG. 1 is a schematic diagram showing an embodiment of the optical transmission system device of the present invention, and FIGS. 2 and 3 are respectively shown in FIG.

Claims (1)

【特許請求の範囲】[Claims] 祝用系としてのループ形光伝送路と、待機糸とし象のス
ター形光伝送路を有する光伝送方式において、前記ルー
プ形光伝送路およびまたは元伝送路端末の障害時、障害
点の前段の光伝送終端末と前記障害点の後段の光伝送終
端末との間をスター形光伝送路で結合させることを特徴
とする光伝送方式。
In an optical transmission system that has a loop-type optical transmission line as a special system and a star-shaped optical transmission line as a standby line, when a failure occurs in the loop-type optical transmission line and/or the original transmission line terminal, the An optical transmission system characterized in that an optical transmission terminal and an optical transmission terminal subsequent to the failure point are coupled by a star-shaped optical transmission line.
JP57059936A 1982-04-10 1982-04-10 Optical transmission system Pending JPS58177041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57059936A JPS58177041A (en) 1982-04-10 1982-04-10 Optical transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57059936A JPS58177041A (en) 1982-04-10 1982-04-10 Optical transmission system

Publications (1)

Publication Number Publication Date
JPS58177041A true JPS58177041A (en) 1983-10-17

Family

ID=13127513

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57059936A Pending JPS58177041A (en) 1982-04-10 1982-04-10 Optical transmission system

Country Status (1)

Country Link
JP (1) JPS58177041A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63108843A (en) * 1986-10-27 1988-05-13 Nippon Telegr & Teleph Corp <Ntt> Method for recovering fault of subscriber optical fiber cable
JPH01241937A (en) * 1988-03-24 1989-09-26 Nec Corp Standby line constitution system
US4871225A (en) * 1984-08-24 1989-10-03 Pacific Bell Fiber optic distribution network
WO1998033287A1 (en) * 1997-01-27 1998-07-30 British Telecommunications Public Limited Company Communications system with star topology
WO1999037050A1 (en) * 1998-01-03 1999-07-22 British Telecommunications Public Limited Company Communications system with star/ring topology

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4871225A (en) * 1984-08-24 1989-10-03 Pacific Bell Fiber optic distribution network
JPS63108843A (en) * 1986-10-27 1988-05-13 Nippon Telegr & Teleph Corp <Ntt> Method for recovering fault of subscriber optical fiber cable
JPH01241937A (en) * 1988-03-24 1989-09-26 Nec Corp Standby line constitution system
WO1998033287A1 (en) * 1997-01-27 1998-07-30 British Telecommunications Public Limited Company Communications system with star topology
WO1999037050A1 (en) * 1998-01-03 1999-07-22 British Telecommunications Public Limited Company Communications system with star/ring topology

Similar Documents

Publication Publication Date Title
JP2553193B2 (en) Protection line control method for network control path network
EP0305994B1 (en) Data communication system having means for switching between main and stand-by apparatuses
JP2001511964A (en) Redundant configuration for telecommunication systems
JPS58177041A (en) Optical transmission system
JPH03132222A (en) Method for branching signal
JPH0352016A (en) Double actuation system for power unit
JPH1117724A (en) Data transmission system
US5459772A (en) External apparatus for monitoring a communication system
JPS634733A (en) Fault detecting and eliminating method for optical communication system
JPS63316541A (en) Detection of troubled place at ring network
JPS60245336A (en) Circuit supervisory device switching system
JPH0423642A (en) Order wire system of ring constitution
JPH0653980A (en) Order wire signal transmission system
JP2765496B2 (en) Path route switching method for SDH transmission network
JPS58182359A (en) Self-control system switching system of electronic exchange
JPS58116840A (en) Centralized annular type data communication network system
JPS6372242A (en) Network system
JPH10133032A (en) Method and device for switching optical fiber cable line
JPS6399632A (en) Connecting method for local area network
JPS6115444A (en) Loopback control system
JPH02272842A (en) Base band network system
JPS6359224A (en) Line switching device
JPH10107742A (en) Digital transmission network
JPH11331226A (en) Order wire connector in optical transmission equipment of ring configuration
JPS59165594A (en) Signal monitor control system