JPH0661943A - Underwater branching device - Google Patents
Underwater branching deviceInfo
- Publication number
- JPH0661943A JPH0661943A JP4126996A JP12699692A JPH0661943A JP H0661943 A JPH0661943 A JP H0661943A JP 4126996 A JP4126996 A JP 4126996A JP 12699692 A JP12699692 A JP 12699692A JP H0661943 A JPH0661943 A JP H0661943A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- terminal
- branching
- submarine
- optical signal
- 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
Links
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- Optical Communication System (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は海中分岐装置に関し、特
に複数の光通話路を海中で２方向に分岐するための海中
分岐装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submarine branching device, and more particularly to a submarine branching device for branching a plurality of optical communication paths in two directions in the sea.
【０００２】[0002]
【従来の技術】従来の海中分岐装置の使用例について、
図２を参照して説明する。端局６−１は送信端子ａ、受
信端子ｂ の組と、送信端子Ｃ、受信端子ｄ の組とを
それぞれ１システムの線路に接続した２システム線路分
の通話路を有しており、同様にそれぞれ２システム線路
分の通話路を有する端局６−２及び６−３の各通信路
は、海底光ファイバーケーブル５−１，５−２，５−３
にて海中分岐装置１０を介して相互に接続されている。
例えば、端局６−１の送信端子ａから送出された光信号
は、海底ファイバーケーブル５−１，光信号分岐回路８
−１，光スイッチ駆動信号受信回路９−１，光信号分岐
回路８−２，海底光ファイバーケーブル５−３を経由し
て、端局６−３の受信端子ａ に達する。また端局６−
３の送信端子ｂから送出された光信号は、海底光ファイ
バーケーブル５−３、光信号分岐回路８−４及び８−
３，海底光ファイバーケーブル５−１を経て、端局６−
１の受信端子ｂ に達する。すなわち端局６−１及び６
−３間は、１システム線路分の通信路で相互接続され
る。2. Description of the Related Art Regarding an example of use of a conventional underwater branching device,
This will be described with reference to FIG. The terminal station 6-1 has a communication path for two system lines in which the set of the transmission terminal a and the reception terminal b and the set of the transmission terminal C and the reception terminal d are connected to the line of one system, respectively. The communication paths of the terminal stations 6-2 and 6-3 each having a communication path for two system lines are submarine optical fiber cables 5-1, 5-2, 5-3.
Are connected to each other via the underwater branching device 10.
For example, the optical signal sent from the transmission terminal a of the terminal station 6-1 is the submarine fiber cable 5-1 and the optical signal branching circuit 8
-1, the optical switch drive signal receiving circuit 9-1, the optical signal branching circuit 8-2, and the submarine optical fiber cable 5-3 to reach the receiving terminal a of the terminal station 6-3. In addition, terminal station 6-
The optical signal sent from the transmission terminal b of No. 3 is the submarine optical fiber cable 5-3 and the optical signal branch circuits 8-4 and 8-.
3, via the submarine optical fiber cable 5-1, terminal station 6-
1 to the receiving terminal b 1. That is, the terminal stations 6-1 and 6
-3 are mutually connected by a communication path for one system line.
【０００３】同様に端局６−１及び６−２と、端局６−
２及び６−３巻とはおのおの、１システム線路分の通信
路で相互接続されている。このゆに海底分岐装置１０
は、２システム線路分の通信路を有する３つの端局６−
１ないし６−３を２システム線路分の光ファイバーケー
ブルを有する海底光ファイバーケーブル５−１ないし５
−３で各システム線路単位で相互に接続する役割を、す
なわち海底光ファイバーケーブルを海中にて２方向に分
岐する役割を有する。Similarly, the terminal stations 6-1 and 6-2 and the terminal station 6-
Volumes 2 and 6-3 are interconnected by a communication path for one system line. This Yuni submarine branching device 10
Are three terminal stations 6- each having a communication path for two system lines.
Submarine optical fiber cables 5-1 to 5 having optical fiber cables 1 to 6-3 for two system lines
-3 has a role of interconnecting each system line unit, that is, a role of branching the submarine optical fiber cable into two directions in the sea.
【０００４】このような海中分岐装置１０を使用した海
底ケーブルシステムにおいて、例えば海底光ファイバー
ケーブル５−３に障害が発生し通信不能となった場合に
は、端局６−１及び６−２間の通信路のみが使用できる
だけの状態になる。海中分岐装置１０には、この様な事
態に対応して通信路を切替えるたの光スイッチ７−１な
いし７−３が装備されており、通信線路の有効活用を図
れる様な構成となっている。もし海底光ファイバーケー
ブル５−３が障害となった場合、端局６−１の送信端子
ａから海中分岐装置１０内の光スイッチを動作させるた
めの光信号すなわち光スイッチ駆動信号を送出すると、
この信号は光スイッチ駆動信号受信回路９−１で受信さ
れ、光スイッチ７−３を駆動して光スイッチ７−３内の
１対のスイッチを同時に閉とする。その結果、端局６−
１の送信端子ａから送出された光信号は海底光ファイバ
ーケーブル５−１，光信号分岐回路８−１，光スイッチ
駆動信号受信回路９−１を通り、光信号分岐回路８−２
で分岐したあと、光スイッチ７−３，光信号分岐回路８
−１２及び８−１１、海底光ファイバーケーブル５−２
を経て端局６−２の受信端子ｆ に達するよう接続切替
えされる。同様に端局６−２の送信端子ｅから送出され
た光信号は、海底光ファイバーケーブル５−２、光信号
分岐回路８−１０及び８−９を通り分岐し、光スイッチ
７−３、光信号分岐回路８−４及び８−３、海底光ファ
イバーケーブル５−１を経て端局６−１の受信端子ｂ
に達するように接続切替えする。In a submarine cable system using the submarine branching device 10 as described above, for example, when a fault occurs in the submarine optical fiber cable 5-3 and communication becomes impossible, the terminal stations 6-1 and 6-2 are connected to each other. Only the communication channel can be used. The submarine branching device 10 is equipped with optical switches 7-1 to 7-3 for switching communication paths in response to such a situation, and has a configuration that enables effective utilization of communication lines. . If the submarine optical fiber cable 5-3 becomes an obstacle, an optical signal for operating the optical switch in the undersea branching device 10, that is, an optical switch drive signal is transmitted from the transmission terminal a of the terminal station 6-1.
This signal is received by the optical switch drive signal receiving circuit 9-1 and drives the optical switch 7-3 to simultaneously close a pair of switches in the optical switch 7-3. As a result, the terminal station 6-
The optical signal sent from the transmission terminal a of No. 1 passes through the submarine optical fiber cable 5-1, the optical signal branching circuit 8-1, the optical switch drive signal receiving circuit 9-1, and the optical signal branching circuit 8-2.
After branching with optical switch 7-3, optical signal branch circuit 8
-12 and 8-11, submarine optical fiber cable 5-2
The connection is switched so as to reach the reception terminal f 1 of the terminal station 6-2 via. Similarly, the optical signal sent from the transmission terminal e of the terminal station 6-2 is branched through the submarine optical fiber cable 5-2, the optical signal branch circuits 8-10 and 8-9, and the optical switch 7-3 and the optical signal are output. The receiving terminal b of the terminal station 6-1 via the branch circuits 8-4 and 8-3 and the submarine optical fiber cable 5-1.
Switch connection to reach.
【０００５】この結果、障害となっていない海底光ファ
イバーケーブル５−１，５−２によって端局６−１及び
６−２間にて２システム線路分の通信路を確保できる。
このように、海中分岐装置１０は海中で通信路を２方向
に分岐するだけでなく、海底光ファイバーケーブルの障
害時に内部の光スイッチの切替えにより通信路を有効に
使用できるよう構成されている。As a result, it is possible to secure a communication path for two system lines between the terminal stations 6-1 and 6-2 by the submarine optical fiber cables 5-1 and 5-2 which are not obstructed.
As described above, the submarine branching device 10 is configured not only to branch the communication path into two directions in the sea but also to effectively use the communication path by switching the internal optical switch when the submarine optical fiber cable fails.
【０００６】[0006]
【発明が解決しようとする課題】上述した従来の海中分
岐装置は、多数の光部品が使用されているため、下記の
ような欠点を有している。すなわち、 （１）通信路の途中に多数の光部品が介在しているの
で、光信号に対する伝送損質が大きい。すなわち、海底
光ファイバーケーブルの故障時には４つの光分岐回路と
１つの光スイッチとを光信号が通過することになり、約
１０ｄＢ程度の伝送損失を生じる。この損失は、海底光
ファイバーケーブルの損失が０．２ｄＢ／Ｋｍ程度であ
る事を考慮すれば、５０Ｋｍ分に相当し、光信号の伝搬
可能距離を極度に短縮させてしまう。The above-mentioned conventional submarine branching device has the following drawbacks because a large number of optical components are used. That is, (1) Since many optical components are provided in the middle of the communication path, the transmission loss of the optical signal is large. That is, when the submarine optical fiber cable fails, an optical signal passes through four optical branch circuits and one optical switch, resulting in a transmission loss of about 10 dB. Considering that the loss of the submarine optical fiber cable is about 0.2 dB / Km, this loss corresponds to 50 Km, and the propagation distance of the optical signal is extremely shortened.
【０００７】（２）海中分岐装置の構成要素は、海底ケ
ーブルシステムの中の海底中継装置や端局装置などとの
間で共用性が無く、専用の設計が必要となる上に、生産
台数も少く、極めてコスト高となる。(2) The components of the submarine branching device are not sharable with the submarine relay device and terminal equipment in the submarine cable system, and a dedicated design is required, and the number of units produced is also high. It is few and extremely expensive.
【０００８】（３）振動や衝撃に弱く、温度による特性
変動も大きい光部品を多用しているので、光部品の相互
接続には特殊な技能を要し、組立所要時間も長くなり、
装置の生産効率が極めて悪い。(3) Since many optical parts that are susceptible to vibrations and shocks and have large characteristic fluctuations due to temperature are used, special skill is required for interconnection of optical parts, and assembly time becomes long,
The production efficiency of the device is extremely poor.
【０００９】[0009]
【課題を解決するための手段】本発明の海中分岐装置
は、複数の通信路の光信号をおのおの送受信する３つの
端局にそれぞれ光伝送路を経由して接続されており、前
記端局が送信する各通信路の光信号をおのおの再生増幅
して相手側の端局に送出し、相手側の端局を切替えるた
めの接続命令情報が送られて来たときには再生増幅した
光信号の送出先を切替える複数の中継器手段と、おのお
の前記送出先を切替えたときの前記再生増幅した光信号
をその切替え先の前記端局へ導くための複数の接続回路
とを備えている。The submarine branching device of the present invention is connected to three terminal stations respectively transmitting and receiving optical signals of a plurality of communication paths via optical transmission paths, and the terminal stations are connected to each other. Each optical signal of each communication channel to be transmitted is regenerated and amplified and sent to the other end station, and when connection command information for switching the other end station is sent, the destination of the regenerated and amplified optical signal And a plurality of connecting circuits for guiding the regenerated and amplified optical signal when the destination is switched to the terminal station of the destination.
【００１０】[0010]
【実施例】次に本実施例について図面を参照して説明す
る。Next, this embodiment will be described with reference to the drawings.
【００１１】図１は本発明の一実施例のブロック図であ
る。端局６−１の送信端子ａから送出された光信号は、
海底光ファイバーケーブル５−１を経て海中分岐装置１
に入力され、中継器４−１にて増幅又は再生されたあ
と、海底光ファイバーケーブル５−３を経て端局６−３
の受信端子ａ に入る。逆に端局６−３の送信端子ｂか
ら送出された光信号は、海底光ファイバーケーブル５−
３を経て海中分岐装置１内の中継器４−１１にて増幅又
は再生されたあと、海底光ファイバーケーブル５−１を
経て端局６−１の受信端子ｂ に入る。すなわち端局６
−１及び６−３間は、１システム線路分の通話路で相互
接続される。FIG. 1 is a block diagram of an embodiment of the present invention. The optical signal transmitted from the transmission terminal a of the terminal station 6-1 is
Submarine branching device 1 via submarine optical fiber cable 5-1
To the terminal station 6-3 via the submarine optical fiber cable 5-3.
Into the receiving terminal a. On the contrary, the optical signal sent from the transmission terminal b of the terminal station 6-3 is the submarine optical fiber cable 5-
After being amplified or reproduced by the repeater 4-11 in the submarine branching device 1 via 3, the signal enters the receiving terminal b 1 of the terminal station 6-1 via the submarine optical fiber cable 5-1. That is, terminal station 6
-1 and 6-3 are interconnected by a communication path for one system line.
【００１２】同様に端局６−１及び６−２間と、端局６
−２及び６−３間とはおのおの、１システム線路分の通
信路で相互接続される。従って、各局の２システム線路
分の通話路が海中で互いに２方向に分岐され、３局間の
相互通信が可能である。Similarly, between the terminal stations 6-1 and 6-2 and between the terminal stations 6
-2 and 6-3 are interconnected by a communication path corresponding to one system line. Therefore, the communication paths corresponding to the two system lines of each station branch in two directions in the sea, and mutual communication between the three stations is possible.
【００１３】本実施例において、例えば海底光ファイバ
ーケーブル５−３に障害が発生し通信不能になった場
合、端局６−１の送信端子ａから海中分岐装置１内の中
継器４−１に対し、他の通信路の中継器４−３の光信号
出力点に接続している接続回路３−１に光信号を送出さ
せるための接続命令情報を含む光信号を送ることによ
り、中継器４−１は中継器４−３の出力点に接続回路３
−１を介して端局６−１からの皮下信号を送出する。同
様に端局６−２の送信端子ｅから中継器４−１３に対し
接続命令情報を送り、中継器４−１３の出力信号を接続
回路３−１３を介して中継器４−１１の出力点に光信号
を送出させる。この結果、端局６−１及び６−２間にて
２システム線路分の通話路が相互接続されたことにな
る。In this embodiment, for example, when the submarine optical fiber cable 5-3 fails and communication becomes impossible, the transmission terminal a of the terminal station 6-1 to the repeater 4-1 in the undersea branching device 1 is used. , By transmitting an optical signal containing connection command information for transmitting the optical signal to the connection circuit 3-1 connected to the optical signal output point of the repeater 4-3 on another communication path, 1 is a connection circuit 3 at the output point of the repeater 4-3
Subcutaneous signal is transmitted from the terminal station 6-1 via -1. Similarly, the connection command information is sent from the transmission terminal e of the terminal station 6-2 to the repeater 4-13, and the output signal of the repeater 4-13 is output via the connection circuit 3-13 to the output point of the repeater 4-11. To send an optical signal. As a result, the communication paths for two system lines are interconnected between the terminal stations 6-1 and 6-2.
【００１４】同様にして海底光ファイバーケーブル５−
２が障害となった場合には、端局６−１の送信端子Ｃか
ら中継器４−１２に対し、また端局６−３の送信端子ｆ
から中継器４−３に対し、それぞれ接続命令情報を送る
ことにより、接続回路３−１２及び３−２を介して端局
６−１及び６−３間にてシステム線路分の通信路の相互
接続を形成できる。また海底光フアイバーケーブル５−
１が障害となった場合、端局６−２の送信端子ｄから中
継器４−２に対し、また端局６−３の送信端子ｂから中
継器４−１１に対し、それぞれ接続命令情報を送ること
により、接続回路３−３及び３−１３を介して端局６−
２及び６−３間にて２システム線路分の通信路の相互接
続を形成できる。Similarly, a submarine optical fiber cable 5-
2 becomes a failure, the transmission terminal C of the terminal station 6-1 to the repeater 4-12 and the transmission terminal f of the terminal station 6-3.
By sending connection command information from the relay station 4-3 to the repeater 4-3, the communication paths corresponding to the system lines are exchanged between the terminal stations 6-1 and 6-3 via the connection circuits 3-12 and 3-2. You can make a connection. Also, submarine optical fiber cable 5-
When 1 fails, connection command information is sent from the transmission terminal d of the terminal station 6-2 to the relay 4-2 and from the transmission terminal b of the terminal station 6-3 to the relay 4-11. By sending, the terminal station 6-via the connection circuits 3-3 and 3-13.
An interconnection of two system lines worth of communication lines can be formed between 2 and 6-3.
【００１５】この結果として実施例では、海中で通信路
を２方向に分岐するだけでなく、海底光ファイバーケー
ブルの障害時においても内部の中継器の接続回路を用い
て通信路を有効に活用できる。As a result, in the embodiment, not only the communication path is branched into two directions in the sea, but also when the submarine optical fiber cable fails, the communication path can be effectively utilized by using the connection circuit of the internal repeater.
【００１６】[0016]
【発明の効果】以上説明したように本発明によれば、光
信号を増幅もしくは再生する中継回路を各送信路に設け
ることにより、 （１）通信路上の光損失の増大を防止できる。As described above, according to the present invention, by providing a relay circuit for amplifying or reproducing an optical signal in each transmission path, (1) it is possible to prevent an increase in optical loss on the communication path.
【００１７】（２）一般の海底ケーブルシステムの中継
局に多数用いられている中継器を変更することなく利用
出来るので、専用設計が不要となり、生産台数が少なく
とも従来装置よりもコストの低減が計れる。(2) Since a large number of repeaters used in a repeater of a general submarine cable system can be used without modification, a dedicated design is not required, and the number of produced units can be reduced at least as compared with the conventional device. .
【００１８】（３）光部品の使用個数が少く、既存の中
継器をそのまま使用できるので、特性も安定し組み立て
作業等に特殊な技能を必要とせず、生産効率を向上し組
立てに要する時間を削減できる。などの効果が得られ
る。(3) Since the number of optical parts used is small and the existing repeater can be used as it is, the characteristics are stable, no special skill is required for assembly work, etc., the production efficiency is improved, and the time required for assembly is improved. Can be reduced. And the like.
【図１】本発明の実施例のブロック図FIG. 1 is a block diagram of an embodiment of the present invention.
【図２】従来の海中分岐装置のブロック図FIG. 2 is a block diagram of a conventional undersea branching device.
１，１０ 海中分岐装置 ３−１〜３−３，３−１１〜３−１３ 接続回路 ４−１〜４−３，４−１１〜４−１３ 中継器 ５−１〜５−３ 海底光ファイバーケーブル ６−１〜６−３ 端局 ７−１〜７−３ 光スイッチ ８−１〜８−１２ 光信号分岐回路 ９−１〜９−３ 光スイッチ駆動信号受信回路 1,10 Underwater branching device 3-1 to 3-3, 3-11 to 3-13 Connection circuit 4-1 to 4-3, 4-11 to 4-13 Repeater 5-1 to 5-3 Submarine optical fiber cable 6-1 to 6-3 Terminal station 7-1 to 7-3 Optical switch 8-1 to 8-12 Optical signal branch circuit 9-1 to 9-3 Optical switch drive signal receiving circuit
Claims (1)
する３つの端局にそれぞれ光伝送路を経由して接続され
ており、前記端局が送信する各通信路の光信号をおのお
の再生増幅して相手側の端局に送出し、相手側の端局を
切替えるための接続命令情報が送られて来たときには再
生増幅した光信号の送出先を切替える複数の中継器手段
と、おのおの前記送出先を切替えたときの前記再生増幅
した光信号をその切替え先の前記端局へ導くための複数
の接続回路とを備えていることを特徴とする海中分岐装
置。1. An optical signal of each communication path transmitted by said terminal station is connected to each of three terminal stations for transmitting and receiving the optical signals of a plurality of communication paths, respectively, and each reproduction signal is amplified. To the other end station, and when the connection command information for switching the other end station is sent, a plurality of repeater means for switching the destination of the regenerated and amplified optical signal, and each of the above-mentioned transmission An undersea branching device, comprising: a plurality of connection circuits for guiding the regenerated and amplified optical signal when the destination is switched to the terminal station to which the destination is switched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4126996A JPH0661943A (en) | 1992-05-20 | 1992-05-20 | Underwater branching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4126996A JPH0661943A (en) | 1992-05-20 | 1992-05-20 | Underwater branching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0661943A true JPH0661943A (en) | 1994-03-04 |
Family
ID=14949090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4126996A Pending JPH0661943A (en) | 1992-05-20 | 1992-05-20 | Underwater branching device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0661943A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002043286A1 (en) * | 2000-11-22 | 2002-05-30 | Mitsubishi Denki Kabushiki Kaisha | Circuit for switching optical paths |
-
1992
- 1992-05-20 JP JP4126996A patent/JPH0661943A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002043286A1 (en) * | 2000-11-22 | 2002-05-30 | Mitsubishi Denki Kabushiki Kaisha | Circuit for switching optical paths |
| US6934434B1 (en) | 2000-11-22 | 2005-08-23 | Mitsubishi Denki Kabushiki Kaisha | Circuit for switching optical paths |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19990413 |