JP3461475B2 - Optical wavelength division multiplexing transmission system and main signal bidirectional shutdown system used for it - Google Patents
Optical wavelength division multiplexing transmission system and main signal bidirectional shutdown system used for itInfo
- Publication number
- JP3461475B2 JP3461475B2 JP25372799A JP25372799A JP3461475B2 JP 3461475 B2 JP3461475 B2 JP 3461475B2 JP 25372799 A JP25372799 A JP 25372799A JP 25372799 A JP25372799 A JP 25372799A JP 3461475 B2 JP3461475 B2 JP 3461475B2
- Authority
- JP
- Japan
- Prior art keywords
- optical amplifier
- relay station
- optical
- main signal
- adjacent
- 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 - Fee Related
Links
Description
【０００１】[0001]
【発明の属する技術分野】本発明は光波長多重伝送シス
テム及びそれに用いる主信号双方向シャットダウン方式
に関し、特に光波長多重伝送装置用の主信号双方向シャ
ットダウン方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical wavelength multiplex transmission system and a main signal bidirectional shutdown system used for the same, and more particularly to a main signal bidirectional shutdown system for an optical wavelength multiplex transmission device.
【０００２】[0002]
【従来の技術】従来、光波長多重伝送システムとして
は、図５に示すように、末端局舎１００，６００の間に
中継局舎２００，３００，４００，５００を配置し、末
端局舎１００の光波長多重伝送装置１０１，１０２と末
端局舎６００の光波長多重伝送装置６０１，６０２との
間を中継局舎２００，３００，４００，５００各々の光
増幅器２０１，２０２，３０１，３０２，４０１，４０
２，５０１，５０２を通して光信号を送受信するものが
ある。2. Description of the Related Art Conventionally, as an optical wavelength division multiplexing transmission system, as shown in FIG. 5, relay stations 200, 300, 400, 500 are arranged between terminal stations 100, 600, and The optical amplifiers 201, 202, 301, 302, 401 of the relay stations 200, 300, 400, 500 are provided between the optical wavelength multiplexing transmission devices 101, 102 and the optical wavelength multiplexing transmission devices 601, 602 of the terminal station 600. 40
There are some which transmit / receive an optical signal through 2,501,502.
【０００３】今、伝送路（光ファイバ）中の切断点１１
０で切断が発生すると、切断された伝送路の端面で光信
号の反射が発生し、中継局舎３００の光増幅器３０１に
てそれが検知される。Now, a cutting point 11 in the transmission line (optical fiber)
When disconnection occurs at 0, reflection of an optical signal occurs at the end surface of the disconnected transmission path, and the optical amplifier 301 of the relay station 300 detects it.
【０００４】反射を検知した光増幅器３０１は光信号の
送信を中止する。この動作によって切断された片側方向
の光信号がシャットダウンされる。尚、その復旧は光増
幅器３０１内の押しボタン（図示せず）を押すことによ
って光信号が再出力されるという手動式のものである。The optical amplifier 301 detecting the reflection stops the transmission of the optical signal. This operation shuts down the unidirectional optical signal cut. Incidentally, the restoration is a manual type in which an optical signal is re-output by pushing a push button (not shown) in the optical amplifier 301.
【０００５】[0005]
【発明が解決しようとする課題】上述した従来の光波長
多重伝送システムのシャットダウン方式では、伝送路切
断時でも装置が反射アラームを検知しない限り、シャッ
トダウンを行わないため、伝送路切断端面から無差別に
主信号が出力されてしまう恐れがあるということであ
る。In the conventional shutdown method of the above-mentioned optical wavelength division multiplex transmission system, since the shutdown is not performed unless the device detects the reflection alarm even when the transmission line is cut, indiscriminately from the end face of the transmission line cut. This means that the main signal may be output.
【０００６】反射とは図５における切断点１１０での切
断時、光増幅器３０１から送出される光信号が切断端面
で跳ね返り、再び光増幅器３０１へ返って来ることであ
る。この時、ある一定以上の光パワーを持った反射光が
光増幅器３０１へ入力しないと、伝送路切断とは見なさ
れない。よって、伝送路の距離が十分に長いと、反射光
が帰還途中に減衰してしまい、伝送路切断とは判断され
ない可能性がある。Reflection means that at the time of cutting at the cutting point 110 in FIG. 5, the optical signal sent from the optical amplifier 301 bounces off at the cutting end face and returns to the optical amplifier 301 again. At this time, unless reflected light having an optical power of a certain level or more is input to the optical amplifier 301, it is not considered that the transmission line is cut. Therefore, if the distance of the transmission path is sufficiently long, the reflected light may be attenuated during the return, and it may not be determined that the transmission path is disconnected.
【０００７】また、従来のシャットダウン方式ではシャ
ットダウンが行われても制御信号に光信号停止アラーム
の状態を加味することが行われないので、自動復旧を行
うためのトリガとなるものが存在しないため、自動復旧
を行うことができないという問題がある。Further, in the conventional shutdown method, since the state of the optical signal stop alarm is not added to the control signal even if the shutdown is performed, there is no trigger that triggers the automatic recovery. There is a problem that automatic recovery cannot be performed.
【０００８】そこで、本発明の目的は上記の問題点を解
消し、端面の覗き込み等による障害発生を防ぐことがで
き、伝送路切断の場所を特定することができる光波長多
重伝送システム及びそれに用いる主信号双方向シャット
ダウン方式を提供することにある。Therefore, an object of the present invention is to solve the above-mentioned problems, prevent the occurrence of troubles due to looking into the end face, etc., and specify an optical wavelength division multiplex transmission system and a place where the transmission line is cut. It is to provide a main signal bidirectional shutdown method to be used.
【０００９】また、本発明の他の目的は、アラームの状
態を監視して自動復旧を行うことができる光波長多重伝
送システム及びそれに用いる主信号双方向シャットダウ
ン方式を提供することにある。Another object of the present invention is to provide an optical wavelength division multiplex transmission system capable of monitoring an alarm condition and performing automatic restoration, and a main signal bidirectional shutdown system used for the same.
【００１０】[0010]
【課題を解決するための手段】本発明による光波長多重
伝送システムは、第１の末端局舎の光波長多重伝送装置
と前記第１の末端局舎に対向する第２の末端局舎の光波
長多重伝送装置との間で互いに異なる方向の第１及び第
２の伝送路を介して光信号の送受信を行い、前記第１の
伝送路上に複数の中継局舎各々の第１の光増幅器が配置
されかつ前記第２の伝送路上に前記複数の中継局舎各々
の第２の光増幅器が配置されてなる光波長多重伝送シス
テムであって、前記第１の光増幅器に設けられかつ前記
第１の伝送路上の光信号が受信不可となった時に同一中
継局舎内の第２の光増幅器に主信号の受信不可の情報を
伝達する手段と、前記第２の光増幅器に設けられかつ同
一中継局舎内の第１の光増幅器から前記主信号の受信不
可の情報が伝達された時に隣接する中継局舎内の第２の
光増幅器への主信号の送出を停止して同一中継局舎内の
第１の光増幅器からの前記主信号の受信不可の情報を、
自中継局舎の制御信号に加えて隣接する中継局舎内の第
２の光増幅器へ送出する手段と、前記第２の光増幅器に
設けられかつ隣接する中継局舎内の第２の光増幅器から
の前記主信号の受信不可の情報の受信時にその情報を同
一中継局舎内の第１の光増幅器に伝達する手段と、前記
第１の光増幅器に設けられかつ同一中継局舎内の第２の
光増幅器から前記主信号の受信不可の情報が伝達された
時に隣接する中継局舎内の第１の光増幅器への主信号の
送出を停止して同一中継局舎内の第２の光増幅器からの
前記主信号の受信不可の情報を解除する解除要請を隣接
する中継局舎内の第１の光増幅器へ送出する手段とを前
記複数の中継局舎各々に具備している。An optical wavelength division multiplex transmission system according to the present invention is an optical wavelength division multiplex transmission device of a first terminal station and an optical wavelength division multiplexing device of a second terminal station opposite to the first terminal station. Optical signals are transmitted / received to / from the wavelength division multiplex transmission apparatus via the first and second transmission paths in mutually different directions, and the first optical amplifier of each of the plurality of relay station buildings is provided on the first transmission path. An optical wavelength division multiplexing transmission system, wherein the second optical amplifier of each of the plurality of relay stations is arranged on the second transmission line, the optical wavelength multiplexing transmission system being provided in the first optical amplifier, Means for transmitting the information indicating that the main signal cannot be received to the second optical amplifier in the same relay station when the optical signal on the transmission path of the second optical amplifier cannot be received, and the same relay provided in the second optical amplifier. Information that the main signal cannot be received is transmitted from the first optical amplifier in the station building. Information unreceivable of the main signal from the first optical amplifier in the same relay station building to stop the transmission of the main signal to the second optical amplifier in the repeater station building adjacent time was,
Means for transmitting to the second optical amplifier in the adjacent relay station in addition to the control signal of the own relay station, and the second optical amplifier in the adjacent relay station provided in the second optical amplifier. Means for transmitting that information to the first optical amplifier in the same relay station when receiving information indicating that the main signal cannot be received from the first relay station, and means for transmitting the information to the first optical amplifier in the same relay station. When the information indicating that the main signal cannot be received is transmitted from the second optical amplifier, the transmission of the main signal to the first optical amplifier in the adjacent relay station building is stopped and the second optical signal in the same relay station building is stopped. Each of the plurality of relay station buildings is provided with means for transmitting a release request for releasing the information indicating that the main signal cannot be received from the amplifier to the first optical amplifier in the adjacent relay station building.
【００１１】本発明による他の光波長多重伝送システム
は、上記の構成のほかに、前記第１の光増幅器に設けら
れかつ隣接する中継局舎内の第１の光増幅器から前記解
除要請を受信した時に同一中継局舎内の第２の光増幅器
に前記解除要請を伝達する手段と、前記第２の光増幅器
に設けられかつ同一中継局舎内の第１の光増幅器から前
記解除要請が伝達された時に隣接する中継局舎内の第２
の光増幅器への主信号の送出を開始して同一中継局舎内
の第１の光増幅器からの前記解除要請を隣接する中継局
舎内の第２の光増幅器へ送出する手段と、前記第２の光
増幅器に設けられかつ隣接する中継局舎内の第２の光増
幅器からの前記解除要請の受信時にその解除要請を同一
中継局舎内の第１の光増幅器に伝達する手段と、前記第
１の光増幅器に設けられかつ同一中継局舎内の第２の光
増幅器から前記解除要請が伝達された時に隣接する中継
局舎内の第１の光増幅器への主信号の送出を開始する手
段とを前記複数の中継局舎各々に具備している。In addition to the above-mentioned configuration, another optical wavelength division multiplex transmission system according to the present invention receives the cancellation request from a first optical amplifier provided in the first optical amplifier and adjacent to a relay station building. Means for transmitting the cancellation request to the second optical amplifier in the same relay station, and the cancellation request transmitted from the first optical amplifier provided in the second optical amplifier and in the same relay station. No. 2 in the relay station building adjacent to the
Means for starting the transmission of the main signal to the second optical amplifier in the same relay station and transmitting the cancellation request from the first optical amplifier in the same relay station to the second optical amplifier in the adjacent relay station. Means for transmitting the cancellation request to the first optical amplifier in the same relay station when the cancellation request is received from the second optical amplifier in the relay station adjacent to the second optical amplifier, When the release request is transmitted from the second optical amplifier provided in the first optical amplifier and in the same relay station, the transmission of the main signal to the first optical amplifier in the adjacent relay station is started. And means for each of the plurality of relay stations.
【００１２】本発明による主信号双方向シャットダウン
方式は、第１の末端局舎の光波長多重伝送装置と前記第
１の末端局舎に対向する第２の末端局舎の光波長多重伝
送装置との間で互いに異なる方向の第１及び第２の伝送
路を介して光信号の送受信を行い、前記第１の伝送路上
に複数の中継局舎各々の第１の光増幅器が配置されかつ
前記第２の伝送路上に前記複数の中継局舎各々の第２の
光増幅器が配置されてなる光波長多重伝送システムの主
信号双方向シャットダウン方式であって、前記第１の伝
送路上の光信号が受信不可となった時に同一中継局舎内
の第２の光増幅器に主信号の受信不可の情報を伝達する
工程と、同一中継局舎内の第１の光増幅器から前記主信
号の受信不可の情報が伝達された時に隣接する中継局舎
内の第２の光増幅器への主信号の送出を停止して同一中
継局舎内の第１の光増幅器からの前記主信号の受信不可
の情報を、自中継局舎の制御信号に加えて隣接する中継
局舎内の第２の光増幅器へ送出する工程と、隣接する中
継局舎内の第２の光増幅器からの前記主信号の受信不可
の情報の受信時にその情報を同一中継局舎内の第１の光
増幅器に伝達する工程と、同一中継局舎内の第２の光増
幅器から前記主信号の受信不可の情報が伝達された時に
隣接する中継局舎内の第１の光増幅器への主信号の送出
を停止して同一中継局舎内の第２の光増幅器からの前記
主信号の受信不可の情報を解除する解除要請を隣接する
中継局舎内の第１の光増幅器へ送出する工程とを前記複
数の中継局舎各々に具備している。In the main signal bidirectional shutdown system according to the present invention, an optical wavelength division multiplex transmission apparatus of a first terminal station and an optical wavelength division multiplexing transmission apparatus of a second terminal station opposite the first terminal station are provided. Optical signals are transmitted and received via first and second transmission lines in mutually different directions, and a first optical amplifier of each of a plurality of relay stations is arranged on the first transmission line, and A main signal bidirectional shutdown method of an optical wavelength division multiplexing transmission system in which the second optical amplifiers of each of the plurality of relay stations are arranged on two transmission lines, and an optical signal on the first transmission line is received. When it becomes impossible, the step of transmitting the information that the main signal cannot be received to the second optical amplifier in the same relay station, and the information that the main signal cannot be received from the first optical amplifier in the same relay station. Second optical amplification in the adjacent relay station when the signal is transmitted First stops the transmission of the main signals of the same relay station the building to the information of unreceivable of the main signal from the optical amplifier, in the repeater station building adjacent in addition to the control signal of the own relay station building The step of sending the information to the second optical amplifier and the reception of the unreceivable information of the main signal from the second optical amplifier in the adjacent relay station building are transmitted to the first optical amplifier in the same relay station building. And transmitting the main signal to the first optical amplifier in the adjacent relay station when the information indicating that the main signal cannot be received is transmitted from the second optical amplifier in the same relay station. Stopping and sending a cancellation request for canceling the unreceivable information of the main signal from the second optical amplifier in the same relay station to the first optical amplifier in the adjacent relay station. It is equipped in each relay station building.
【００１３】本発明による他の主信号双方向シャットダ
ウン方式は、上記の工程のほかに、隣接する中継局舎内
の第１の光増幅器から前記解除要請を受信した時に同一
中継局舎内の第２の光増幅器に前記解除要請を伝達する
工程と、 同一中継局舎内の第１の光増幅器から前記解
除要請が伝達された時に隣接する中継局舎内の第２の光
増幅器への主信号の送出を開始して同一中継局舎内の第
１の光増幅器からの前記解除要請を隣接する中継局舎内
の第２の光増幅器へ送出する工程と、隣接する中継局舎
内の第２の光増幅器からの前記解除要請の受信時にその
解除要請を同一中継局舎内の第１の光増幅器に伝達する
工程と、同一中継局舎内の第２の光増幅器から前記解除
要請が伝達された時に隣接する中継局舎内の第１の光増
幅器への主信号の送出を開始する工程とを前記複数の中
継局舎各々に具備している。Another main signal bidirectional shutdown method according to the present invention is, in addition to the above-mentioned steps, a method in which a cancellation request is received from a first optical amplifier in an adjacent relay station building. And transmitting the cancellation request to the second optical amplifier, and a main signal to the second optical amplifier in the adjacent relay station when the cancellation request is transmitted from the first optical amplifier in the same relay station building. And sending the release request from the first optical amplifier in the same relay station building to the second optical amplifier in the adjacent relay station building, and the second request in the adjacent relay station building. And transmitting the cancellation request to the first optical amplifier in the same repeater station when the cancellation request is received from the optical amplifier in the same relay station, and the cancellation request is transmitted from the second optical amplifier in the same repeater station. The main signal to the first optical amplifier in the adjacent relay station And a step of starting exiting is provided in each of the plurality of relay station buildings.
【００１４】すなわち、本発明の光波長多重伝送システ
ムは、障害等による伝送路（光ファイバ）の切断時の主
信号シャットダウンを双方向において実現し、従来より
も安全性を高めたことを特徴としている。That is, the optical wavelength division multiplex transmission system of the present invention is characterized in that the main signal shutdown at the time of disconnection of the transmission line (optical fiber) due to a failure or the like is realized bidirectionally, and the safety is improved as compared with the prior art. There is.
【００１５】より具体的に、本発明の光波長多重伝送シ
ステムでは、末端局舎の光波長多重伝送装置が末端側か
ら収容した複数本の光信号を波長変換して波長多重を行
い、一本の光信号として光増幅器へ送信する。光増幅器
では受信した光信号を増幅し、隣接局舎へ送信する。最
終的に、対向する光波長多重伝送装置がこの光信号を受
信し、元の複数本の光信号に変換して光波長多重伝送が
終了する。More specifically, in the optical wavelength division multiplex transmission system of the present invention, the optical wavelength division multiplexing transmission device of the terminal station wavelength-converts a plurality of optical signals accommodated from the terminal side to perform wavelength division multiplexing, and Is transmitted to the optical amplifier. The optical amplifier amplifies the received optical signal and transmits it to the adjacent station building. Finally, the opposed optical wavelength division multiplex transmission device receives this optical signal, converts it into the original plurality of optical signals, and the optical wavelength division multiplex transmission is completed.
【００１６】今、伝送路中のある地点にて障害による伝
送路切断が発生したとすると、その伝送路の切断によっ
て、光増幅器では主信号を受信することができなくな
る。その受信不可の情報を同じ中継局舎内の反対方向送
信用の光増幅器に伝え、その光増幅器は逆向きの伝送路
を使って同情報を隣接局舎の光増幅器に伝える。隣接局
舎の光増幅器は受信した情報を、受信不可を検出した光
増幅器に伝え、最終的にこの光増幅器が主信号の送信を
停止する。If a transmission line disconnection occurs due to a failure at a certain point in the transmission line, the optical amplifier cannot receive the main signal due to the disconnection of the transmission line. The unreceivable information is transmitted to the optical amplifier for transmission in the opposite direction in the same relay station, and the optical amplifier transmits the information to the optical amplifier in the adjacent station using the transmission path in the opposite direction. The optical amplifier in the adjacent station transmits the received information to the optical amplifier that has detected the reception failure, and finally this optical amplifier stops the transmission of the main signal.
【００１７】このようにして、本発明では逆方向の伝送
路を利用して伝送路切断の情報を切断場所直前の光増幅
器に伝えて双方向の主信号シャットダウンを行い、切断
ファイバ端面からの無差別なレーザ出力を防ぎ、安全性
の確保を実現している。As described above, in the present invention, the information of the transmission line disconnection is transmitted to the optical amplifier immediately before the disconnection site by using the transmission line in the opposite direction to perform the bidirectional main signal shutdown, and the information from the end face of the cut fiber is eliminated. This prevents discriminative laser output and ensures safety.
【００１８】[0018]
【発明の実施の形態】次に、本発明の一実施例について
図面を参照して説明する。図１は本発明の一実施例によ
る光波長多重伝送システムの構成を示すブロック図であ
る。図１において、本発明の一実施例による光波長多重
伝送システムは末端局舎１，６の間に中継局舎２，３，
４，５を配置して構成され、末端局舎１の光波長多重伝
送装置１１，１２と末端局舎６の光波長多重伝送装置６
１，６２との間を中継局舎２，３，４，５各々の光増幅
器２１，２２，３１，３２，４１，４２，５１，５２を
通して光信号を送受信している。BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an optical wavelength division multiplexing transmission system according to an embodiment of the present invention. Referring to FIG. 1, an optical wavelength division multiplex transmission system according to an embodiment of the present invention includes relay stations 2, 3, between terminal stations 1, 6.
4 and 5 are arranged, and the optical wavelength multiplex transmission apparatuses 11 and 12 of the terminal station 1 and the optical wavelength multiplexing transmission apparatus 6 of the terminal station 6 are arranged.
Optical signals are transmitted to and received from the relay stations 1 and 62 through the optical amplifiers 21, 22, 31, 32, 41, 42, 51 and 52 of the relay stations 2, 3, 4, and 5, respectively.
【００１９】尚、末端局舎１の光波長多重伝送装置１１
と末端局舎６の光波長多重伝送装置６１との間には中継
局舎２，３，４，５各々の光増幅器２１，３１，４１，
５１を介して第１の伝送路が、末端局舎６の光波長多重
伝送装置６２と末端局舎１の光波長多重伝送装置１２と
の間には中継局舎５，４，３，２各々の光増幅器５２，
４２，３２，２２を介して第２の伝送路がそれぞれ形成
されている。The optical wavelength division multiplexing transmission device 11 in the terminal station 1
Between the optical wavelength multiplexing transmission device 61 of the terminal station 6 and the optical amplifiers 21, 31, 41 of the relay stations 2, 3, 4, 5 respectively.
The first transmission path via 51 is provided between the optical wavelength multiplex transmission device 62 of the terminal station 6 and the optical wavelength multiplex transmission device 12 of the terminal station 1, and relay stations 5, 4, 3, 2 are respectively provided. Optical amplifier 52,
Second transmission lines are formed via 42, 32, and 22, respectively.
【００２０】末端局舎１，６の光波長多重伝送装置１
１，６２は末端側から受信した複数本の光信号を相異な
る波長に変換し、それらを一本の光信号に合波して主信
号とする。また、光波長多重伝送装置１１，６２は自局
舎の障害情報を含む制御信号を主信号と合波し、最終的
に一本の光信号に合成した後、中継局舎２，５の光増幅
器２１，５２へ送信する。Optical wavelength division multiplexing transmission device 1 in terminal stations 1 and 6
Reference numerals 1 and 62 convert a plurality of optical signals received from the terminal side into different wavelengths and combine them into a single optical signal to be used as a main signal. In addition, the optical wavelength division multiplexing transmission equipment 11, 62 multiplexes the control signal including the failure information of the own station building with the main signal, and finally combines them into one optical signal, and then the optical signals of the relay station buildings 2, 5 are combined. It transmits to the amplifiers 21 and 52.
【００２１】中継局舎２，５の光増幅器２１，５２は受
信した光信号を長距離伝送路を通過しても隣接する光増
幅器が受信可能な光信号まで増幅し、隣接局舎の光増幅
器（中継局舎３，４の光増幅器３１，４２）へ送信す
る。その際、中継局舎２，５の光増幅器２１，５２は受
信した光信号を主信号と制御信号とに分波し、自局の障
害情報を含む制御信号を合波して送信する。この動作を
繰返し、対向する末端局舎６，１へ光信号を送信する。The optical amplifiers 21 and 52 of the relay stations 2 and 5 amplify the received optical signals to optical signals that can be received by the adjacent optical amplifiers even if they pass through the long-distance transmission line, and the optical amplifiers of the adjacent stations. (The optical amplifiers 31 and 42 of the relay stations 3 and 4). At that time, the optical amplifiers 21 and 52 of the relay stations 2 and 5 demultiplex the received optical signal into a main signal and a control signal, and multiplex and transmit a control signal including failure information of the own station. By repeating this operation, the optical signal is transmitted to the opposite terminal stations 6 and 1.
【００２２】対向する末端局舎６，１の光波長伝送装置
６１，１２では光信号を受信した後、主信号と制御信号
とに分波し、主信号を波長変換して元の複数本の光信号
に復調する。After receiving the optical signal, the optical wavelength transmission devices 61 and 12 of the opposite terminal stations 6 and 1 demultiplex the optical signal into a main signal and a control signal, and the main signal is wavelength-converted into a plurality of original signals. Demodulate to an optical signal.
【００２３】上記の構成において、例えば伝送路中の切
断点７にて伝送路切断の障害が発生したとすると、中継
局舎４の光増幅器４１は伝送路カットのために光信号を
受信することができない。中継局舎４の光増幅器４１は
この非受信状態の情報を同じ中継局舎４内の光増幅器４
２に通知する。光増幅器４２はこの情報を自局制御信号
に加え、対向する中継局舎３の光増幅器３２へ送信す
る。尚、その際、主信号は自主的に送信を停止する。In the above configuration, if a failure of the transmission line disconnection occurs at the disconnection point 7 in the transmission line, the optical amplifier 41 of the repeater station 4 receives the optical signal for cutting the transmission line. I can't. The optical amplifier 41 of the repeater station 4 transmits the information of the non-reception state to the optical amplifier 4 in the same repeater station 4.
Notify 2. The optical amplifier 42 adds this information to its own control signal, and transmits it to the optical amplifier 32 of the relay station building 3 opposite thereto. At this time, the main signal voluntarily stops transmission.
【００２４】中継局舎３の光増幅器３２はこの制御信号
を受信すると、その情報を同じ中継局舎３内の光増幅器
３１へ通知し、光増幅器３１は自局主信号の送信を停止
する。この時、光増幅器３１は自局の制御信号を出力し
続ける。When the optical amplifier 32 of the relay station 3 receives the control signal, the optical amplifier 32 notifies the information to the optical amplifier 31 in the same relay station 3 and the optical amplifier 31 stops the transmission of its own main signal. At this time, the optical amplifier 31 continues to output its own control signal.
【００２５】図２は図１に示す中継局舎３，４の詳細な
構成を示すブロック図である。図２において、光増幅器
３１，３２，４１，４２は受信した光信号を増幅し、対
向装置へ送信する。FIG. 2 is a block diagram showing a detailed configuration of the relay station buildings 3 and 4 shown in FIG. In FIG. 2, the optical amplifiers 31, 32, 41 and 42 amplify the received optical signals and transmit them to the opposite device.
【００２６】伝送路中の切断点７において切断障害が発
生した場合、光増幅器４１は前段の光増幅器３１が送信
する主信号及び制御信号を受信することができないの
で、この状態を障害情報として同じ中継局舎４内にある
制御ユニット４３に伝える。When a disconnection failure occurs at the disconnection point 7 in the transmission line, the optical amplifier 41 cannot receive the main signal and the control signal transmitted by the optical amplifier 31 in the preceding stage. Therefore, this state is used as failure information. Notify the control unit 43 in the relay station building 4.
【００２７】制御ユニット４３はこの情報を自局制御信
号に取込み、光増幅器４２の制御信号として送信するよ
う指示を出す。また同時に、制御ユニット４３は光増幅
器４２の主信号の送信停止の指示も行う。光増幅器４２
は制御ユニット４３の指示を受取ると、主信号の送信を
中止し、障害情報を加味した制御信号を光増幅器３２へ
出力する。The control unit 43 takes this information into its own control signal and gives an instruction to transmit it as a control signal for the optical amplifier 42. At the same time, the control unit 43 also gives an instruction to stop the transmission of the main signal of the optical amplifier 42. Optical amplifier 42
When receiving the instruction from the control unit 43, stops the transmission of the main signal and outputs the control signal with the fault information to the optical amplifier 32.
【００２８】光増幅器３２は光増幅器４２から送信され
てきた制御信号を受信し、障害情報を同じ中継局舎３内
にある制御ユニット３３へ伝える。制御ユニット３３は
障害情報を受取ると、光増幅器３１へ主信号の送信停止
の指示を出す。光増幅器３１は制御ユニット３３から主
信号の送信停止の指示を受取ると、主信号の送信を停止
する。尚、この時、光増幅器３１は制御信号の送信停止
を行わずに、依然として制御信号を送信し続ける。The optical amplifier 32 receives the control signal transmitted from the optical amplifier 42 and transmits fault information to the control unit 33 in the same relay station building 3. Upon receiving the failure information, the control unit 33 gives an instruction to the optical amplifier 31 to stop the transmission of the main signal. When the optical amplifier 31 receives the instruction to stop the transmission of the main signal from the control unit 33, the optical amplifier 31 stops the transmission of the main signal. At this time, the optical amplifier 31 does not stop the transmission of the control signal but continues to transmit the control signal.
【００２９】以上、本発明の一実施例の構成を詳細に述
べたが、図１に示す光波長多重伝送装置１１，１２，６
１，６２及び光増幅器２１，２２，３１，３２，４１，
４２，５１，５２の波長多重伝送機能は当業者にとって
よく知られており、また本発明とは直接関係しないの
で、その詳細な構成の説明は省略する。The configuration of one embodiment of the present invention has been described above in detail. The optical wavelength division multiplexing transmission equipment 11, 12, 6 shown in FIG.
1, 62 and optical amplifiers 21, 22, 31, 32, 41,
The wavelength multiplexing transmission functions of 42, 51 and 52 are well known to those skilled in the art, and since they are not directly related to the present invention, detailed description of their configurations will be omitted.
【００３０】図３は本発明の一実施例による光波長多重
伝送システムの主信号双方向シャットダウンの処理動作
を示すシーケンスチャートであり、図４は本発明の一実
施例による光波長多重伝送システムの主信号双方向復旧
の処理動作を示すシーケンスチャートである。これら図
１〜図４を参照して本発明の一実施例による光波長多重
伝送システムの主信号双方向シャットダウン及び主信号
双方向復旧の処理動作について説明する。FIG. 3 is a sequence chart showing the processing operation of the main signal bidirectional shutdown of the optical wavelength division multiplex transmission system according to the embodiment of the present invention, and FIG. 4 is the optical wavelength division multiplex transmission system according to the embodiment of the present invention. 7 is a sequence chart showing the processing operation of main signal bidirectional restoration. The processing operation of the main signal bidirectional shutdown and the main signal bidirectional restoration of the optical wavelength multiplexing transmission system according to the embodiment of the present invention will be described with reference to FIGS.
【００３１】伝送路上において中継局舎３，４間の切断
点７にて障害が発生して伝送路が切断されると、中継局
舎４の光増幅器４１では中継局舎３の光増幅器３１が送
信する主信号８及び制御信号９を共に受信できなくな
る。この時、光増幅器４１は主信号停止及び制御信号停
止の障害アラームを発出する（図３のａ．参照）。この
両アラーム発生状態を光信号停止アラーム発生の条件と
定義し、本方式で採用する。光信号停止とは主信号及び
制御信号の双方ともに停止状態であることを意味する。When a failure occurs at the disconnection point 7 between the relay stations 3 and 4 on the transmission path and the transmission path is disconnected, the optical amplifier 41 of the relay station 4 causes the optical amplifier 31 of the relay station 3 to operate. It becomes impossible to receive both the main signal 8 and the control signal 9 to be transmitted. At this time, the optical amplifier 41 issues a failure alarm for stopping the main signal and stopping the control signal (see a. In FIG. 3). Both of these alarm occurrence states are defined as conditions for the optical signal stop alarm occurrence and are adopted in this method. The optical signal stop means that both the main signal and the control signal are in a stopped state.
【００３２】光増幅器４１は光信号停止アラームを同じ
中継局舎４内にある制御ユニット４３に発出し、制御ユ
ニット４３はそれを受信する。制御ユニット４３では光
信号停止アラームを受信後、二つの制御動作を指示する
（図３のｂ．参照）。すなわち、その制御動作の一つは
光増幅器４２の主信号停止指示であり、もう一つは制御
信号１０に光信号停止アラームが発生状態であることを
加味することである。The optical amplifier 41 issues an optical signal stop alarm to the control unit 43 in the same repeater station 4, and the control unit 43 receives it. After receiving the optical signal stop alarm, the control unit 43 instructs two control operations (see b. In FIG. 3). That is, one of the control operations is an instruction to stop the main signal of the optical amplifier 42, and the other is to add to the control signal 10 that an optical signal stop alarm is being generated.
【００３３】これらの指示動作によって、光増幅器４２
からの主信号の送信は停止し、かつ光信号停止アラーム
を加味した制御信号が送信される（図３のｃ．参照）。
尚、本システムで採用する制御信号の光パワーは十分安
全性を考慮したものであり、切断端面の覗き込み等によ
る事故が発生しない程度の値を維持することとする。By these instruction operations, the optical amplifier 42
From the main signal is stopped, and a control signal in which an optical signal stop alarm is added is transmitted (see c. In FIG. 3).
The optical power of the control signal used in this system is designed with safety in mind, and the value should be maintained at a level at which an accident such as looking into the cut end does not occur.
【００３４】中継局舎３の光増幅器３２では光増幅器４
２から送信されてきた光信号停止アラームが加味された
制御信号１０を受信し、その情報を同じ中継局舎３内に
ある制御ユニット３３へ伝える（図３のｄ．参照）。In the optical amplifier 32 of the relay station building 3, the optical amplifier 4
The control signal 10 added with the optical signal stop alarm transmitted from No. 2 is received, and the information is transmitted to the control unit 33 in the same relay station building 3 (see d. In FIG. 3).
【００３５】制御ユニット３３では光信号停止アラーム
を検知した後、二つの動作指示を行う（図３のｅ．参
照）。すなわち、その動作指示の一つは光増幅器３１が
送信する主信号８の停止指示であり、もう一つは制御信
号９に光信号停止アラームの解除要請を加味することで
ある。After detecting the optical signal stop alarm, the control unit 33 gives two operation instructions (see e. In FIG. 3). That is, one of the operation instructions is an instruction to stop the main signal 8 transmitted by the optical amplifier 31, and the other is to add a cancellation request of the optical signal stop alarm to the control signal 9.
【００３６】これらの指示動作によって、光増幅器３１
からの主信号８の送信は停止し、光信号停止アラーム解
除を加味した制御信号９が送信される（図３のｆ．参
照）。但し、この解除要請が加味された制御信号９は依
然として伝送路が切断されているために光増幅器４１へ
は到達しない。By these instruction operations, the optical amplifier 31
From the main signal 8 is stopped, and the control signal 9 in consideration of cancellation of the optical signal stop alarm is transmitted (see f. In FIG. 3). However, the control signal 9 to which the cancellation request is added does not reach the optical amplifier 41 because the transmission line is still disconnected.
【００３７】上記のような中継局舎３，４の動作によっ
て、伝送路切断による双方向の主信号シャットダウンが
完了し、伝送路切断端面から発出される光信号は制御信
号のみとなって安全性が確保される。By the operation of the relay stations 3 and 4 as described above, the bidirectional main signal shutdown due to the disconnection of the transmission path is completed, and the optical signal emitted from the end surface of the transmission path disconnection becomes only the control signal, which is safe. Is secured.
【００３８】光増幅器３１は伝送路切断中も光信号停止
アラーム解除の制御信号９を送信し続けているので、切
断点７での伝送路切断が復旧すると、光増幅器４１にて
制御信号９の受信が開始され、光増幅器４１は制御ユニ
ット４３に対して光信号停止アラームの解除を要請する
（図４のａ．参照）。Since the optical amplifier 31 continues to transmit the control signal 9 for releasing the optical signal stop alarm even during the disconnection of the transmission line, when the disconnection of the transmission line at the disconnection point 7 is restored, the optical amplifier 41 outputs the control signal 9 of the control signal 9. When the reception is started, the optical amplifier 41 requests the control unit 43 to release the optical signal stop alarm (see a. In FIG. 4).
【００３９】制御ユニット４３では光信号停止アラーム
の解除要請を受けて、二つの制御動作を行う（図４の
ｂ．参照）。すなわち、その制御動作の一つは光増幅器
４２からの主信号の送出指示であり、もう一つは制御信
号１０に光信号停止アラームに解除要請を加味すること
である。これらの指示動作によって、光増幅器４２から
主信号が送信され、かつ光信号停止アラーム解除を加味
した制御信号１０が送信される（図４のｃ．参照）。In response to the request for canceling the optical signal stop alarm, the control unit 43 performs two control operations (see b. In FIG. 4). That is, one of the control operations is an instruction to send the main signal from the optical amplifier 42, and the other is to add a cancellation request to the control signal 10 to the optical signal stop alarm. By these instruction operations, the main signal is transmitted from the optical amplifier 42, and the control signal 10 in which the cancellation of the optical signal stop alarm is added is transmitted (see c. In FIG. 4).
【００４０】光増幅器３２では光増幅器４２から送信さ
れた光信号停止アラーム解除が加味された制御信号１０
を受信し、その情報を制御ユニット３３へ伝える（図４
のｄ．参照）。制御ユニット３３は光信号停止アラーム
解除を検知した後、光増幅器３１からの主信号８の送信
指示を出す（図４のｅ．参照）。この指示動作によっ
て、光増幅器３１から主信号８が送信される（図４の
ｆ．参照）。In the optical amplifier 32, the control signal 10 transmitted from the optical amplifier 42 is added with the cancellation of the optical signal stop alarm.
Is received and the information is transmitted to the control unit 33 (see FIG. 4).
D. reference). After detecting the cancellation of the optical signal stop alarm, the control unit 33 issues an instruction to transmit the main signal 8 from the optical amplifier 31 (see e. In FIG. 4). By this instruction operation, the main signal 8 is transmitted from the optical amplifier 31 (see f. In FIG. 4).
【００４１】上述した中継局舎３，４の動作によって、
切断点７での伝送路切断が復旧した時に伝送路切断によ
る主信号シャットダウンから自動的に主信号双方向復旧
が完了する。By the operation of the relay stations 3 and 4 described above,
When the transmission line disconnection at the disconnection point 7 is restored, the main signal bidirectional restoration is automatically completed from the main signal shutdown due to the transmission line disconnection.
【００４２】尚、本実施例では片方向の伝送路切断時に
ついて述べてきたが、切断時も制御信号を常に流してい
ることによって両方向の伝送路が切断された時でもシャ
ットダウン及び自動復旧に対応することが可能である。In this embodiment, the case of disconnecting the transmission path in one direction has been described. However, even when the transmission path in both directions is disconnected, the system can be shut down and automatically restored even when the transmission line in both directions is disconnected. It is possible to
【００４３】このように、本発明の一実施例では、伝送
路切断面から出力される光信号を制御信号のみに限定す
ることができるので、端面の覗き込み等による障害発生
を防ぐことができる。As described above, in the embodiment of the present invention, since the optical signal output from the cut surface of the transmission line can be limited to the control signal only, it is possible to prevent the occurrence of troubles due to looking into the end face. .
【００４４】また、本発明の一実施例では、伝送路が切
断されても制御信号が依然として送出され続けるため、
アラーム発生の状況を対向局舎に送出可能であることか
ら、伝送路切断の場所を特定することができる。Further, in one embodiment of the present invention, since the control signal is still transmitted even if the transmission line is disconnected,
Since the status of alarm occurrence can be sent to the opposite station, it is possible to specify the location of the transmission path disconnection.
【００４５】さらに、本発明の一実施例では、伝送路が
切断されても制御信号が依然として送出され続けるた
め、アラームの状態を監視して自動復旧を可能にするこ
とができる。Further, in one embodiment of the present invention, since the control signal is still transmitted even if the transmission line is disconnected, it is possible to monitor the alarm condition and enable automatic recovery.
【００４６】尚、上記の説明では伝送路切断中でも光信
号停止アラームが加味された制御信号を送信している
が、制御信号を送信する代わりに、制御信号の出力パワ
ーで一定時間、パルス信号の出力を行うことも可能であ
る。In the above description, the control signal added with the optical signal stop alarm is transmitted even when the transmission line is cut. However, instead of transmitting the control signal, the output power of the control signal is used for a certain period of time to change the pulse signal. It is also possible to output.
【００４７】この場合、双方向シャットダウンが完了
し、一定時間が経過した状態であるとする時、光増幅器
４２はパルス信号を出力する。もし、伝送路が復旧して
いれば、このパルス信号が光増幅器３２，３１を介して
光増幅器４１まで到達するはずである。In this case, when it is assumed that the bidirectional shutdown is completed and a certain period of time has passed, the optical amplifier 42 outputs a pulse signal. If the transmission path is restored, this pulse signal should reach the optical amplifier 41 via the optical amplifiers 32 and 31.
【００４８】よって、このパルス信号が光増幅器４１に
て一定時間以上検出された場合、伝送路復旧とみなして
再び光増幅器４２から主信号の送信を開始して双方向シ
ャットダウンから復旧することができる。Therefore, when this pulse signal is detected by the optical amplifier 41 for a certain period of time or longer, it is considered that the transmission line has been restored, and the optical amplifier 42 can start transmitting the main signal again to recover from the bidirectional shutdown. .
【００４９】このように動作させることで、特別な制御
信号を使用することなく双方向シャットダウンからの復
旧を行うことができるので、機器構成を簡素化すること
ができ、安価に自動復旧を実現することができる。By operating in this way, it is possible to recover from the bidirectional shutdown without using a special control signal, so that the device configuration can be simplified and the automatic recovery is realized at a low cost. be able to.
【００５０】[0050]
【発明の効果】以上説明したように本発明の光波長多重
伝送システムによれば、第１の末端局舎の光波長多重伝
送装置と第１の末端局舎に対向する第２の末端局舎の光
波長多重伝送装置との間で互いに異なる方向の第１及び
第２の伝送路を介して光信号の送受信を行い、第１の伝
送路上に複数の中継局舎各々の第１の光増幅器が配置さ
れかつ第２の伝送路上に複数の中継局舎各々の第２の光
増幅器が配置されてなる光波長多重伝送システムにおい
て、複数の中継局舎各々が、第１の伝送路上の光信号が
受信不可となった時に同一中継局舎内の第２の光増幅器
に主信号の受信不可の情報を伝達し、同一中継局舎内の
第１の光増幅器から主信号の受信不可の情報が伝達され
た時に隣接する中継局舎内の第２の光増幅器への主信号
の送出を停止して同一中継局舎内の第１の光増幅器から
の主信号の受信不可の情報を隣接する中継局舎内の第２
の光増幅器へ送出し、隣接する中継局舎内の第２の光増
幅器からの主信号の受信不可の情報の受信時にその情報
を同一中継局舎内の第１の光増幅器に伝達し、同一中継
局舎内の第２の光増幅器から主信号の受信不可の情報が
伝達された時に隣接する中継局舎内の第１の光増幅器へ
の主信号の送出を停止して同一中継局舎内の第２の光増
幅器からの主信号の受信不可の情報に対する解除要請を
隣接する中継局舎内の第１の光増幅器へ送出することに
よって、端面の覗き込み等による障害発生を防ぐことが
でき、伝送路切断の場所を特定することができるという
効果がある。As described above, according to the optical wavelength division multiplex transmission system of the present invention, the optical wavelength division multiplex transmission device of the first terminal station and the second terminal station opposite to the first terminal station. Optical signal is transmitted / received to / from the optical wavelength division multiplexing transmission device via the first and second transmission lines in different directions, and the first optical amplifier of each of the plurality of relay stations is provided on the first transmission line. In the optical wavelength division multiplexing transmission system in which the second optical amplifiers of the plurality of relay stations are respectively arranged on the second transmission line, each of the plurality of relay stations has an optical signal on the first transmission line. When it becomes unreceivable, the information that the main signal cannot be received is transmitted to the second optical amplifier in the same relay station, and the information that the main signal cannot be received is transmitted from the first optical amplifier in the same relay station. When it is transmitted, stop sending the main signal to the second optical amplifier in the adjacent relay station building. Second in the relay station building adjacent information unreceivable the main signal from the first optical amplifier in one repeating station building
To the first optical amplifier in the same relay station when the information that the main signal cannot be received from the second optical amplifier in the adjacent relay station is received. When information indicating that the main signal cannot be received is transmitted from the second optical amplifier in the repeater building, the transmission of the main signal to the first optical amplifier in the adjacent repeater building is stopped and the same repeater building is provided. By sending the cancellation request for the unreceivable information of the main signal from the second optical amplifier to the first optical amplifier in the adjacent relay station building, it is possible to prevent the occurrence of a failure due to the end face peeping or the like. The advantage is that the location of the transmission line disconnection can be specified.
【００５１】また、本発明の他の光波長多重伝送システ
ムによれば、複数の中継局舎各々が、隣接する中継局舎
内の第１の光増幅器から解除要請を受信した時に同一中
継局舎内の第２の光増幅器に前記解除要請を伝達し、同
一中継局舎内の第１の光増幅器から解除要請が伝達され
た時に隣接する中継局舎内の第２の光増幅器への主信号
の送出を開始して同一中継局舎内の第１の光増幅器から
の解除要請を隣接する中継局舎内の第２の光増幅器へ送
出し、隣接する中継局舎内の第２の光増幅器からの解除
要請の受信時にその解除要請を同一中継局舎内の第１の
光増幅器に伝達し、同一中継局舎内の第２の光増幅器か
ら解除要請が伝達された時に隣接する中継局舎内の第１
の光増幅器への主信号の送出を開始することによって、
アラームの状態を監視して自動復旧を行うことができる
という効果がある。Further, according to another optical wavelength division multiplex transmission system of the present invention, each of the plurality of relay station buildings receives the cancellation request from the first optical amplifier in the adjacent relay station building. Main signal to the second optical amplifier in the adjacent relay station when the release request is transmitted to the second optical amplifier in the relay station and when the release request is transmitted from the first optical amplifier in the same relay station To send a cancellation request from the first optical amplifier in the same relay station building to the second optical amplifier in the adjacent relay station building, and the second optical amplifier in the adjacent relay station building. When the cancellation request is received from the relay station, the cancellation request is transmitted to the first optical amplifier in the same relay station building, and when the cancellation request is transmitted from the second optical amplifier in the same relay station building, the adjacent relay station building First of
By starting to send the main signal to the optical amplifier of
The effect is that the alarm status can be monitored and automatic recovery can be performed.
【図１】本発明の一実施例による光波長多重伝送システ
ムの構成を示すブロック図である。FIG. 1 is a block diagram showing a configuration of an optical wavelength multiplexing transmission system according to an embodiment of the present invention.
【図２】図１に示す中継局舎の詳細な構成を示すブロッ
ク図である。FIG. 2 is a block diagram showing a detailed configuration of a relay station building shown in FIG.
【図３】本発明の一実施例による光波長多重伝送システ
ムの主信号双方向シャットダウンの処理動作を示すシー
ケンスチャートである。FIG. 3 is a sequence chart showing a processing operation of bidirectional main signal shutdown in the optical wavelength division multiplexing transmission system according to the embodiment of the present invention.
【図４】本発明の一実施例による光波長多重伝送システ
ムの主信号双方向復旧の処理動作を示すシーケンスチャ
ートである。FIG. 4 is a sequence chart showing a processing operation of bidirectional restoration of the main signal in the optical wavelength division multiplexing transmission system according to the embodiment of the present invention.
【図５】従来例による光波長多重伝送システムの構成を
示すブロック図である。FIG. 5 is a block diagram showing a configuration of an optical wavelength division multiplexing transmission system according to a conventional example.
１，６ 末端局舎 ２〜５ 中継局舎 ７ 切断点 ８ 主信号 ９，１０ 制御信号 １１，１２，６１，６２ 光波長多重伝送装置 ２１，２２，３１，３２， ４１，４２，５１，５２ 光増幅器 ３３，４３ 制御ユニット 1,6 Terminal building 2-5 Relay station 7 cutting points 8 main signals 9,10 control signal 11, 12, 61, 62 Optical WDM transmission equipment 21, 22, 31, 32, 41, 42, 51, 52 Optical amplifier 33,43 Control unit
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｈ０４Ｊ 14/02 (56)参考文献 特開2000−286798（ＪＰ，Ａ) 特開 平９−46297（ＪＰ，Ａ) 特開 平２−209030（ＪＰ，Ａ) 特開 平11−225116（ＪＰ，Ａ) 特開 平７−30495（ＪＰ，Ａ) 特開 平５−336042（ＪＰ，Ａ) 米国特許4994675（ＵＳ，Ａ) 国際公開00／67251（ＷＯ，Ａ１) 国際公開00／01081（ＷＯ，Ａ１) (58)調査した分野(Int.Cl.7，ＤＢ名) H04B 17/02 H04B 10/02 H04B 10/08 H04B 10/24 H04J 14/00 H04J 14/02 Continuation of front page (51) Int.Cl. 7 Identification code FI H04J 14/02 (56) References JP 2000-286798 (JP, A) JP 9-46297 (JP, A) JP 2 209030 (JP, A) JP-A-11-225116 (JP, A) JP-A-7-30495 (JP, A) JP-A-5-336042 (JP, A) US Patent 4994675 (US, A) International Publication 00 / 67251 (WO, A1) International publication 00/01081 (WO, A1) (58) Fields investigated (Int.Cl. 7 , DB name) H04B 17/02 H04B 10/02 H04B 10/08 H04B 10/24 H04J 14/00 H04J 14/02
Claims (9)
前記第１の末端局舎に対向する第２の末端局舎の光波長
多重伝送装置との間で互いに異なる方向の第１及び第２
の伝送路を介して光信号の送受信を行い、前記第１の伝
送路上に複数の中継局舎各々の第１の光増幅器が配置さ
れかつ前記第２の伝送路上に前記複数の中継局舎各々の
第２の光増幅器が配置されてなる光波長多重伝送システ
ムであって、 前記第１の光増幅器に設けられかつ前記第１の伝送路上
の光信号が受信不可となった時に同一中継局舎内の第２
の光増幅器に主信号の受信不可の情報を伝達する手段
と、 前記第２の光増幅器に設けられかつ同一中継局舎内の第
１の光増幅器から前記主信号の受信不可の情報が伝達さ
れた時に隣接する中継局舎内の第２の光増幅器への主信
号の送出を停止して同一中継局舎内の第１の光増幅器か
らの前記主信号の受信不可の情報を、自中継局舎の制御
信号に加えて隣接する中継局舎内の第２の光増幅器へ送
出する手段と、 前記第２の光増幅器に設けられかつ隣接する中継局舎内
の第２の光増幅器からの前記主信号の受信不可の情報の
受信時にその情報を同一中継局舎内の第１の光増幅器に
伝達する手段と、 前記第１の光増幅器に設けられかつ同一中継局舎内の第
２の光増幅器から前記主信号の受信不可の情報が伝達さ
れた時に隣接する中継局舎内の第１の光増幅器への主信
号の送出を停止して同一中継局舎内の第２の光増幅器か
らの前記主信号の受信不可の情報を解除する解除要請を
隣接する中継局舎内の第１の光増幅器へ送出する手段と
を前記複数の中継局舎各々に有することを特徴とする光
波長多重伝送システム。1. An optical wavelength division multiplex transmission apparatus of a first terminal station and an optical wavelength division multiplex transmission apparatus of a second terminal station opposite to the first terminal station have first directions in mutually different directions. And the second
Optical signals are transmitted and received through the transmission line of the first transmission line, the first optical amplifiers of the plurality of relay station buildings are arranged on the first transmission line, and the plurality of relay station buildings are arranged on the second transmission line. An optical wavelength division multiplex transmission system in which the second optical amplifier is arranged, and the same relay station is provided when the optical signal provided on the first optical amplifier and on the first transmission line cannot be received. Second of
Means for transmitting the main signal unreceivable information to the optical amplifier, and the main signal unreceivable information transmitted from the first optical amplifier provided in the second optical amplifier and within the same relay station. When the main signal is not received from the first optical amplifier in the same relay station by stopping the transmission of the main signal to the second optical amplifier in the adjacent relay station, Building control
Means for sending to the second optical amplifier in the repeater station building adjacent in addition to the signal, the main signal from the second optical amplifier in the repeater station building where provided and adjacent to the second optical amplifier Means for transmitting the unreceivable information to a first optical amplifier in the same relay station; and a second optical amplifier provided in the first optical amplifier and in the same relay station, When the information indicating that the main signal cannot be received is transmitted, the transmission of the main signal to the first optical amplifier in the adjacent relay station building is stopped, and the main signal from the second optical amplifier in the same relay station building is stopped. And a means for sending a cancellation request for canceling the unreceivable information to the first optical amplifier in the adjacent relay station building in each of the plurality of relay station buildings.
する中継局舎内の第１の光増幅器から前記解除要請を受
信した時に同一中継局舎内の第２の光増幅器に前記解除
要請を伝達する手段と、 前記第２の光増幅器に設けられかつ同一中継局舎内の第
１の光増幅器から前記解除要請が伝達された時に隣接す
る中継局舎内の第２の光増幅器への主信号の送出を開始
して同一中継局舎内の第１の光増幅器からの前記解除要
請を隣接する中継局舎内の第２の光増幅器へ送出する手
段と、 前記第２の光増幅器に設けられかつ隣接する中継局舎内
の第２の光増幅器からの前記解除要請の受信時にその解
除要請を同一中継局舎内の第１の光増幅器に伝達する手
段と、 前記第１の光増幅器に設けられかつ同一中継局舎内の第
２の光増幅器から前記解除要請が伝達された時に隣接す
る中継局舎内の第１の光増幅器への主信号の送出を開始
する手段とを前記複数の中継局舎各々に含むことを特徴
とする請求項１記載の光波長多重伝送システム。2. The cancellation request is sent to the second optical amplifier in the same relay station when the cancellation request is received from the first optical amplifier provided in the first optical amplifier and adjacent to the relay station. To a second optical amplifier provided in the second optical amplifier and adjacent to the second optical amplifier in the adjacent relay station when the release request is transmitted from the first optical amplifier in the same relay station. Means for starting the transmission of the main signal and transmitting the cancellation request from the first optical amplifier in the same relay station building to the second optical amplifier in the adjacent relay station building; Means for transmitting the cancellation request to the first optical amplifier in the same relay station when the cancellation request is received from the second optical amplifier in the adjacent relay station building, and the first optical amplifier The release request is transmitted from the second optical amplifier installed in the same relay station building. 2. The optical wavelength division multiplexer according to claim 1, further comprising means for starting transmission of a main signal to a first optical amplifier in an adjacent relay station building when each of the plurality of relay station buildings is reached. Transmission system.
の第１の光増幅器から前記主信号の受信不可の情報が伝
達された時に隣接する中継局舎内の第２の光増幅器へ制
御信号の出力パワーでパルス信号の出力を一定時間行う
ことで同一中継局舎内の第１の光増幅器からの前記主信
号の受信不可の情報を送出するよう構成したことを特徴
とする請求項１または請求項２記載の光波長多重伝送シ
ステム。3. The second optical amplifier is a second optical amplifier in an adjacent relay station building when information indicating that the main signal cannot be received is transmitted from the first optical amplifier in the same relay station building. To output the pulse signal with the output power of the control signal for a certain period of time to transmit the information indicating that the main signal cannot be received from the first optical amplifier in the same repeater station. The optical wavelength multiplexing transmission system according to claim 1 or 2.
前記第１の末端局舎に対向する第２の末端局舎の光波長
多重伝送装置との間で互いに異なる方向の第１及び第２
の伝送路を介して光信号の送受信を行い、前記第１の伝
送路上に複数の中継局舎各々の第１の光増幅器が配置さ
れかつ前記第２の伝送路上に前記複数の中継局舎各々の
第２の光増幅器が配置されてなる光波長多重伝送システ
ムであって、 前記第１の光増幅器で前記第１の伝送路上の光信号が受
信不可となった時に同一中継局舎内の第２の光増幅器に
主信号の受信不可の情報を伝達する機能と、 前記主信号の受信不可の情報の伝達時に同一中継局舎内
の第２の光増幅器から隣接する中継局舎内の第２の光増
幅器への主信号の送出を停止させかつ前記主信号の受信
不可の情報を、自中継局舎の制御信号に加えて同一中継
局舎内の第２の光増幅器から隣接する中継局舎内の第２
の光増幅器へ送出させる機能と、 隣接する中継局舎内の第２の光増幅器からの前記主信号
の受信不可の情報を受信した時に当該主信号の受信不可
の情報を同一中継局舎内の第１の光増幅器に伝達する機
能と、 前記主信号の受信不可の情報の伝達された時に同一中継
局舎内の第１の光増幅器から隣接する中継局舎内の第１
の光増幅器への主信号の送出を停止させかつ前記主信号
の受信不可の情報を解除する解除要請を隣接する中継局
舎内の第１の光増幅器へ送出させる機能とを含む制御ユ
ニットを前記複数の中継局舎各々に有することを特徴と
する光波長多重伝送システム。4. An optical wavelength division multiplex transmission apparatus of a first terminal station and an optical wavelength division multiplex transmission apparatus of a second terminal station opposite to the first terminal station have first directions different from each other. And the second
Optical signals are transmitted and received through the transmission line of the first transmission line, the first optical amplifiers of the plurality of relay station buildings are arranged on the first transmission line, and the plurality of relay station buildings are arranged on the second transmission line. The optical wavelength division multiplexing transmission system in which the second optical amplifier of the above is arranged, and when the optical signal on the first transmission line cannot be received by the first optical amplifier, A function of transmitting information indicating that the main signal cannot be received to the second optical amplifier, and a second optical amplifier located in the adjacent relay station from the second optical amplifier in the same relay station when transmitting the information indicating that the main signal cannot be received. Of the main signal to the optical amplifier of the present invention and information indicating that the main signal cannot be received is added to the control signal of the own relay station , and the second optical amplifier in the same relay station adjoins the adjacent relay station. Second of
Function for sending to the optical amplifier of the main signal and the information that the main signal cannot be received from the second optical amplifier in the adjacent relay station. A function of transmitting to the first optical amplifier, and a first optical amplifier in the adjacent relay station from the first optical amplifier in the same relay station when the information indicating that the main signal cannot be received is transmitted.
And a function for stopping the transmission of the main signal to the optical amplifier and transmitting a cancellation request for canceling the unreceivable information of the main signal to the first optical amplifier in the adjacent relay station building. An optical wavelength division multiplex transmission system characterized by having a plurality of relay stations respectively.
の第１の光増幅器から前記解除要請を受信した時に同一
中継局舎内の第２の光増幅器に前記解除要請を伝達する
機能と、 前記解除要請の伝達時に隣接する中継局舎内の第２の光
増幅器への主信号の送出を開始させかつ前記解除要請を
隣接する中継局舎内の第２の光増幅器へ送出させる機能
と、 同一中継局舎内の第２の光増幅器が隣接する中継局舎内
の第２の光増幅器から前記解除要請を受信した時にその
解除要請を同一中継局舎内の第１の光増幅器に伝達する
機能と、 前記解除要請の伝達時に同一中継局舎内の第１の光増幅
器から隣接する中継局舎内の第１の光増幅器への主信号
の送出を開始させる機能とを含むことを特徴とする請求
項４記載の光波長多重伝送システム。5. The control unit includes a second optical amplifier in the same relay station building when the first optical amplifier in the same relay station building receives the cancellation request from the first optical amplifier in the adjacent relay station building. Function for transmitting the release request to the optical amplifier, and when transmitting the release request, start transmission of the main signal to the second optical amplifier in the adjacent relay station building and transmit the release request to the adjacent relay station building. The same function for sending to the second optical amplifier in the same relay station and the release request when the second optical amplifier in the same relay station receives the release request from the second optical amplifier in the adjacent relay station building. A function of transmitting to the first optical amplifier in the relay station, and a main signal from the first optical amplifier in the same relay station to the first optical amplifier in the adjacent relay station when transmitting the release request. 5. The method according to claim 4, further comprising: Wavelength multiplexing transmission system.
可の情報を同一中継局舎内の第２の光増幅器から隣接す
る中継局舎内の第２の光増幅器へ送出させる機能は、同
一中継局舎内の第１の光増幅器で前記第１の伝送路上の
光信号が受信不可となった時に同一中継局舎内の第２の
光増幅器から隣接する中継局舎内の第２の光増幅器へ制
御信号の出力パワーでパルス信号の出力を一定時間行わ
せるよう構成したことを特徴とする請求項４または請求
項５記載の光波長多重伝送システム。6. The function of transmitting the information indicating that the main signal cannot be received by the control unit from the second optical amplifier in the same relay station to the second optical amplifier in the adjacent relay station has the same relay function. When the optical signal on the first transmission line cannot be received by the first optical amplifier in the station building, the second optical amplifier in the relay station building adjacent to the second optical amplifier in the same relay station building 6. The optical wavelength division multiplex transmission system according to claim 4 or 5, wherein the output of the control signal is used to output the pulse signal for a certain period of time.
前記第１の末端局舎に対向する第２の末端局舎の光波長
多重伝送装置との間で互いに異なる方向の第１及び第２
の伝送路を介して光信号の送受信を行い、前記第１の伝
送路上に複数の中継局舎各々の第１の光増幅器が配置さ
れかつ前記第２の伝送路上に前記複数の中継局舎各々の
第２の光増幅器が配置されてなる光波長多重伝送システ
ムの主信号双方向シャットダウン方式であって、 前記第１の伝送路上の光信号が受信不可となった時に同
一中継局舎内の第２の光増幅器に主信号の受信不可の情
報を伝達する工程と、 同一中継局舎内の第１の光増幅器から前記主信号の受信
不可の情報が伝達された時に隣接する中継局舎内の第２
の光増幅器への主信号の送出を停止して同一中継局舎内
の第１の光増幅器からの前記主信号の受信不可の情報
を、自中継局舎の制御信号に加えて隣接する中継局舎内
の第２の光増幅器へ送出する工程と、 隣接する中継局舎内の第２の光増幅器からの前記主信号
の受信不可の情報の受信時にその情報を同一中継局舎内
の第１の光増幅器に伝達する工程と、 同一中継局舎内の第２の光増幅器から前記主信号の受信
不可の情報が伝達された時に隣接する中継局舎内の第１
の光増幅器への主信号の送出を停止して同一中継局舎内
の第２の光増幅器からの前記主信号の受信不可の情報を
解除する解除要請を隣接する中継局舎内の第１の光増幅
器へ送出する工程とを前記複数の中継局舎各々に有する
ことを特徴とする主信号双方向シャットダウン方式。7. A first wavelength-division multiplex transmission device of a first terminal station and an optical wavelength-division multiplex transmission device of a second terminal station opposite to the first terminal station in different directions. And the second
Optical signals are transmitted and received through the transmission line of the first transmission line, the first optical amplifiers of the plurality of relay station buildings are arranged on the first transmission line, and the plurality of relay station buildings are arranged on the second transmission line. Is a main signal bidirectional shutdown method for an optical wavelength division multiplex transmission system in which the second optical amplifier is installed, and when the optical signal on the first transmission line becomes unreceivable, The step of transmitting the information that the main signal cannot be received to the second optical amplifier, and the step of transmitting the information that the main signal cannot be received from the first optical amplifier in the same relay station Second
A relay station of the information of the unreceivable of the main signal from the first optical amplifier to stop the transmission of the main signal to the optical amplifier identical repeater station in building, adjacent in addition to the control signal of the own relay station building The step of sending the information to the second optical amplifier in the building and the reception of the unreceivable information of the main signal from the second optical amplifier in the adjacent relay station building are transmitted to the first optical amplifier in the same relay station building. And a step of transmitting the information indicating that the main signal cannot be received from the second optical amplifier in the same relay station,
Of the main signal from the second optical amplifier in the same relay station by stopping the transmission of the main signal to the optical amplifier of
A main signal bidirectional shutdown method, characterized in that each of the plurality of relay station buildings has a step of transmitting a release request to be released to a first optical amplifier in an adjacent relay station building.
ら前記解除要請を受信した時に同一中継局舎内の第２の
光増幅器に前記解除要請を伝達する工程と、 同一中継局舎内の第１の光増幅器から前記解除要請が伝
達された時に隣接する中継局舎内の第２の光増幅器への
主信号の送出を開始して同一中継局舎内の第１の光増幅
器からの前記解除要請を隣接する中継局舎内の第２の光
増幅器へ送出する工程と、 隣接する中継局舎内の第２の光増幅器からの前記解除要
請の受信時にその解除要請を同一中継局舎内の第１の光
増幅器に伝達する工程と、 同一中継局舎内の第２の光増幅器から前記解除要請が伝
達された時に隣接する中継局舎内の第１の光増幅器への
主信号の送出を開始する工程とを前記複数の中継局舎各
々に含むことを特徴とする請求項７記載の主信号双方向
シャットダウン方式。8. A step of transmitting the cancellation request to a second optical amplifier in the same relay station when the cancellation request is received from the first optical amplifier in the adjacent relay station, and the same relay station. When the release request is transmitted from the first optical amplifier in the same relay station, the main signal is started to be transmitted to the second optical amplifier in the adjacent relay station And sending the cancellation request to the second optical amplifier in the adjacent relay station building, and when receiving the cancellation request from the second optical amplifier in the adjacent relay station building, the cancellation request is sent to the same relay station. Transmitting to the first optical amplifier in the building, and the main signal to the first optical amplifier in the adjacent relay station when the release request is transmitted from the second optical amplifier in the same relay station And a step of starting the transmission of each of the plurality of relay stations. Item 7. A main signal bidirectional shutdown method according to item 7.
の第１の光増幅器から前記主信号の受信不可の情報が伝
達された時に隣接する中継局舎内の第２の光増幅器へ制
御信号の出力パワーでパルス信号の出力を一定時間行う
ことで同一中継局舎内の第１の光増幅器からの前記主信
号の受信不可の情報を送出するようにしたことを特徴と
する請求項７または請求項８記載の主信号双方向シャッ
トダウン方式。9. The second optical amplifier in a relay station adjacent to the second optical amplifier when the information indicating that the main signal cannot be received is transmitted from the first optical amplifier in the same relay station. The information indicating that the main signal cannot be received from the first optical amplifier in the same repeater station is transmitted by outputting the pulse signal for a certain period of time with the output power of the control signal. 9. The main signal bidirectional shutdown method according to claim 7 or claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25372799A JP3461475B2 (en) | 1999-09-08 | 1999-09-08 | Optical wavelength division multiplexing transmission system and main signal bidirectional shutdown system used for it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25372799A JP3461475B2 (en) | 1999-09-08 | 1999-09-08 | Optical wavelength division multiplexing transmission system and main signal bidirectional shutdown system used for it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001077731A JP2001077731A (en) | 2001-03-23 |
| JP3461475B2 true JP3461475B2 (en) | 2003-10-27 |
Family
ID=17255312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25372799A Expired - Fee Related JP3461475B2 (en) | 1999-09-08 | 1999-09-08 | Optical wavelength division multiplexing transmission system and main signal bidirectional shutdown system used for it |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3461475B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002335216A (en) * | 2001-05-09 | 2002-11-22 | Nec Corp | Optical signal shutdown system and optical signal processor using the same |
| JP4615155B2 (en) * | 2001-07-31 | 2011-01-19 | 古河電気工業株式会社 | Optical communication method and system |
| JP2004297790A (en) * | 2003-03-10 | 2004-10-21 | Nec Corp | Optical node apparatus, optical network system, and its control method |
| JP4636806B2 (en) * | 2004-02-24 | 2011-02-23 | 富士通株式会社 | Optical output control method and optical output control apparatus in optical transmission node |
| JP6416617B2 (en) * | 2014-12-25 | 2018-10-31 | Ｎｅｃプラットフォームズ株式会社 | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD |
-
1999
- 1999-09-08 JP JP25372799A patent/JP3461475B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001077731A (en) | 2001-03-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2096403C (en) | Fail-safe automatic shut-down apparatus and method for high output power optical communications system | |
| EP2271005B1 (en) | Optical bidirectional communication system with supervisory channel | |
| JP4495321B2 (en) | Light level control method | |
| JPH11205243A (en) | Automatic power stop system for optical transmission line | |
| WO2000001081A1 (en) | Optical amplification relay system | |
| JP2000174706A (en) | Method and device for automatically controlling output power of optical signal | |
| JPH0637717A (en) | Supervisory control system for optical repeater | |
| JP2682517B2 (en) | Light output blocking system | |
| US7551857B2 (en) | Optical transmission system | |
| EP1839402B1 (en) | Method of controlling optical amplifier located along an optical link | |
| US8958692B2 (en) | Optical fiber transmission system and power control method of the same | |
| US7430373B2 (en) | Optical node processor, optical network system and its control method | |
| JP3461475B2 (en) | Optical wavelength division multiplexing transmission system and main signal bidirectional shutdown system used for it | |
| EP1788727A1 (en) | Method to protect human eyes in optical communication system | |
| JP2003046413A (en) | Optical transmission line changeover system and optical transmission line changeover method | |
| JP4615155B2 (en) | Optical communication method and system | |
| JP4794775B2 (en) | Optical transmission system | |
| JPH0738506A (en) | Optical repeater and optical transmission system | |
| JP2001024589A (en) | Optical communication monitor system | |
| JP2882360B2 (en) | Optical reception monitoring system | |
| JP2004207811A (en) | Wavelength multiplex transmission apparatus and wavelength multiplex transmission system | |
| EP1130804A1 (en) | Optical transmission system automatic laser shut down | |
| JP2011182277A (en) | Transmission device and method for determining location of the failure | |
| JP2002335216A (en) | Optical signal shutdown system and optical signal processor using the same | |
| JPH1174912A (en) | Detection of disconnection of optical bus-type transmission line and its device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070815 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080815 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080815 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090815 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090815 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100815 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110815 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110815 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120815 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130815 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |