JPH03230629A - Optical submarine relay system - Google Patents
Optical submarine relay systemInfo
- Publication number
- JPH03230629A JPH03230629A JP2026688A JP2668890A JPH03230629A JP H03230629 A JPH03230629 A JP H03230629A JP 2026688 A JP2026688 A JP 2026688A JP 2668890 A JP2668890 A JP 2668890A JP H03230629 A JPH03230629 A JP H03230629A
- Authority
- JP
- Japan
- Prior art keywords
- terminal station
- optical
- systems
- optical submarine
- phase modulation
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 38
- 239000013307 optical fiber Substances 0.000 claims description 9
- 230000010355 oscillation Effects 0.000 abstract description 3
- 238000012790 confirmation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は光海底中継方式に関し、特にシステム切替機能
を有する光海底中継器を内蔵した光海底中継方式に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical submarine repeater system, and more particularly to an optical submarine repeater system incorporating an optical submarine repeater having a system switching function.
従来、この種の光海底中継システムは、光海底中継器の
信頼性が非常に高いことがらシステム冗長性を有する考
え方は採用せず、必要システム数のみを内蔵していた。Conventionally, this type of optical submarine repeater system did not adopt the concept of system redundancy because the reliability of optical submarine repeaters was extremely high, and only the required number of systems were built-in.
その為、端局においては、受信システムの番号がシステ
ム建設時に確定されていた。Therefore, at the terminal station, the receiving system number was determined at the time of system construction.
第２図は従来の光海底中継方式の構成図である。第２図
は、上り、下りのうちの上り方向のみを示し、端局（Ａ
）ｌａは３つのシステム、システム（１）１１−１．シ
ステム（２）１１−２およびシステム（３）１１−３の
送信側端局であり、３つのシステムの出力をそれぞれ光
出力回路（１）〜（３）４−１〜４−３によって光信号
に変換し光ファイバ（１）〜（３）６−１〜６−３に送
出、光ファイバ（１）〜（３）６−１〜６−３は光海底
ケーブル７に組み入れられ、システム（１）１１−１．
システム（２）１１−２．システム（３）１１−３の受
信側端局としての端局（Ｂ）ｌｂに供給される。端局（
Ｂ）ｌｂでは、光ファイバ〈１）〜＜３）６−１〜６−
３による信号をそれぞれ光受信回路（１）〜（３）８−
１〜８−３に供給して電気信号に変換し、システム（１
）１１−１．システム（２）１１−２およびシステム（
３）１１−３に供給する。このように、受信システムの
番号構成は、システム建設時に確定されていた。FIG. 2 is a block diagram of a conventional optical submarine relay system. Figure 2 shows only the upstream direction of the upstream and downstream directions, and shows the terminal station (A
) la has three systems, system (1) 11-1. It is a transmitting side terminal station of system (2) 11-2 and system (3) 11-3, and outputs from the three systems are sent as optical signals through optical output circuits (1) to (3) 4-1 to 4-3, respectively. The optical fibers (1) to (3) 6-1 to 6-3 are incorporated into the optical submarine cable 7, and the optical fibers (1) to (3) 6-1 to 6-3 are incorporated into the optical submarine cable 7 and sent out to the optical fibers (1) to (3) 6-1 to 6-3. )11-1.
System (2) 11-2. The signal is supplied to terminal station (B) lb as a receiving side terminal station of system (3) 11-3. Terminal (
B) In lb, optical fibers <1) to <3) 6-1 to 6-
3 to optical receiving circuits (1) to (3) 8-
1 to 8-3, convert it into an electrical signal, and send it to the system (1
)11-1. System (2) 11-2 and system (
3) Supply to 11-3. In this way, the number structure of the receiving system was determined at the time of system construction.
上述した従来の光海底中継方式は、光海底中継システム
全体の信頼性をより一層高める為システム冗長性を持つ
という考えが近年活発になり、システム冗長性を持つ可
能性が高くなった。また、システム冗長方式も種種案が
考えられており、複雑な冗長方式では光海底ケーブル区
間に配設した中継器のシステムライン切替に対応した受
信側端局でのシステム番号の確認が必要となる可能性が
極めて高いが、従来の光海底中継方式ではシステム番号
確認機能を有していないという欠点がある。In recent years, the idea of having system redundancy in the conventional optical submarine relay system described above to further improve the reliability of the entire optical submarine relay system has become active, and the possibility of having system redundancy has increased. In addition, various types of system redundancy methods are being considered, and in complex redundancy methods, it is necessary to confirm the system number at the receiving end station that supports system line switching of repeaters installed in the optical submarine cable section. Although this possibility is extremely high, the conventional optical submarine relay system has the disadvantage that it does not have a system number confirmation function.
本発明の方式は、上り及び下りの光フアイバペアを１シ
ステムとする多システムを伝送する光海底中継方式にお
いて、前記多システムのシステムごとに異った特定周波
数の位相変調をかけ、受信側端局において前記特性周波
数を復調して受信したシステムの番号を判別する構成を
有する。The system of the present invention is an optical submarine relay system that transmits multiple systems including uplink and downlink optical fiber pairs as one system. The receiver has a configuration for demodulating the characteristic frequency and determining the number of the received system.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の光海底中継方式の一実施例のブロック
図であり、上り、下りの光フアイバペアのうち上り方向
のみを示している。FIG. 1 is a block diagram of an embodiment of the optical submarine relay system of the present invention, showing only the upstream direction of the upstream and downstream optical fiber pairs.
端局Ａ１は、２つのシステム（１）１１−１゜システム
（２）１１−２およびシステム（３）１１−３の送信側
端局である。システム（１）１１−１は、発振器（１）
５−１．位相変調回路（１）３−１、および光出力回路
（１）４−１を有する。また、システム（２）１１−２
およびシステム（３）１１−３もシステム（１）１１−
１と同様に、それぞれ発振器（２＞５−２．位相変調回
路＜２）３−２および発振器（３）５−３゜位相変調回
路（３）３−３を有する。一方、端局（Ｂ）２は、シス
テム（１）１１−１．システム（２）１１−２．システ
ム（３）１１−３の受信側端局であり、システム（１）
１１−１は本実施例の場合、光受信回路（３）８−３位
相復調回路（３）９−３および周波数カウンタ（３）１
０−３を有する。またシステム（２）１１−２は、光受
信回路＜１）８−１．位相復調回路（１）９−２、周波
数カウンタ（２＞１０−２を有して成る。Terminal station A1 is a transmitting terminal station of two systems (1) 11-1° system (2) 11-2 and system (3) 11-3. System (1) 11-1 is an oscillator (1)
5-1. It has a phase modulation circuit (1) 3-1 and an optical output circuit (1) 4-1. Also, system (2) 11-2
and system (3) 11-3 as well as system (1) 11-
1, each has an oscillator (2>5-2.phase modulation circuit<2) 3-2 and an oscillator (3)5-3.degree. phase modulation circuit (3) 3-3. On the other hand, terminal station (B) 2 has system (1) 11-1. System (2) 11-2. System (3) is the receiving side terminal station of 11-3, and system (1)
In this embodiment, 11-1 is an optical receiving circuit (3) 8-3 a phase demodulation circuit (3) 9-3 and a frequency counter (3) 1
Has 0-3. Further, the system (2) 11-2 includes an optical receiving circuit <1) 8-1. It comprises a phase demodulation circuit (1) 9-2 and a frequency counter (2>10-2).
次に、本実施例の動作を第１図を参照して説明する。シ
ステム（１）１１−１の電気信号は端局Ａ１の発振器（
１）５−１で発振された周波数ｆ１で位相変調回路（１
）３−１により位相変調され、光出力回路（１１４−１
によって電気信号から光信号に変換されて光ファイバ（
１）６−１を通して光海底ケーブル７に入り、端局Ｂ２
に伝達される。この時、光海底ケーブル７の区間内に、
システム切替状態を有する光海底中継器が入っていると
、第１図に示すように、たとえば端局Ｂ２の上からシス
テム（２）、１１−２．システム（３）１１−３．シス
テム（１）１１−１というように信号が入って来ること
もあり得る。この時、入力された光信号を光受信回路（
１）８−１で光から電気信号に変換し、次に位相復調回
路（１）９−１で復調し、周波数カウンタ（１）１０−
１で周波数を読み取る、すると、端局Ａ１の発振器（２
）５−２により発振された周波数であることが判り、端
局Ｂ２の最上段のシステムはシステム＜２）１１−２で
あることが識別できる。他のシステムも同様にして識別
ができる。Next, the operation of this embodiment will be explained with reference to FIG. The electric signal of system (1) 11-1 is transmitted to the oscillator (
1) The phase modulation circuit (1
)3-1, and the optical output circuit (114-1
The electrical signal is converted into an optical signal by the optical fiber (
1) Enter the optical submarine cable 7 through 6-1, and enter the terminal station B2
is transmitted to. At this time, within the section of optical submarine cable 7,
If an optical submarine repeater with a system switching state is included, as shown in FIG. 1, systems (2), 11-2, . System (3) 11-3. It is also possible that a signal such as system (1) 11-1 comes in. At this time, the input optical signal is transmitted to the optical receiving circuit (
1) 8-1 converts light into an electrical signal, then demodulates it in phase demodulation circuit (1) 9-1, and frequency counter (1) 10-
1 to read the frequency, then the oscillator (2
)5-2, and it can be identified that the system at the top of the terminal station B2 is system<2)11-2. Other systems can be similarly identified.
このようにして、光海底ケーブル内で任意にシステム切
換が行われても、受信端局側で自動的にシステム番号の
確認が可能となる。下り方向も全く同様に識別を行う。In this way, even if the system is arbitrarily switched within the optical submarine cable, the system number can be automatically confirmed on the receiving end station side. Identification is performed in exactly the same way in the downward direction.
以上説明したように本発明は、送信する信号に、システ
ムごとに特有の発振信号で位相変調を施しておくことに
より、光海底ケーブル区間に配設した中継器による任意
のシステム切替が行われても、受信側で発振信号を復調
・識別しシステム番号を容易に特定できる効果がある。As explained above, the present invention applies phase modulation to the transmitted signal using an oscillation signal specific to each system, thereby making it possible to perform arbitrary system switching using a repeater installed in an optical submarine cable section. This also has the effect of allowing the receiving side to demodulate and identify the oscillation signal and easily identify the system number.
第１図は本発明の光海底中継方式の一実施例のブロック
図、第２図は従来の光海底中継方式のブロック図である
。
１．１２・・・端局Ａ、１ａ・・・端局（Ａ）−２・・
・端局Ｂ、２ ａ一端局（Ｂ）、３−１〜３−３．．．
位相変調回路（１）〜（３）、４−１〜４−３・・・光
出力回路（１）〜（３）、５−１〜５−３・・・発振器
、（１）〜（３）、６−１〜６−３・・・光ファイバ（
１）〜（３）、７・・・光海底ケーブル、８−１〜８−
３・・・光受信回路（１）〜（３＞、９−１〜９−３・
・・位相復調回路（１）〜（３）、１０−１〜１０−３
・・・周波数カウンタ（１）〜（３）。FIG. 1 is a block diagram of an embodiment of the optical submarine relay system of the present invention, and FIG. 2 is a block diagram of a conventional optical submarine relay system. 1.12...Terminal station A, 1a...Terminal station (A)-2...
・Terminal station B, 2a one terminal station (B), 3-1 to 3-3. ．． ．．
Phase modulation circuits (1) to (3), 4-1 to 4-3... Optical output circuits (1) to (3), 5-1 to 5-3... Oscillators, (1) to (3) ), 6-1 to 6-3... optical fiber (
1) ~ (3), 7... Optical submarine cable, 8-1 ~ 8-
3... Optical receiving circuit (1) to (3>, 9-1 to 9-3.
...Phase demodulation circuits (1) to (3), 10-1 to 10-3
...Frequency counters (1) to (3).
Claims (1)
ステムを伝送する光海底中継方式において、前記多シス
テムのシステムごとに異った特定周波数の位相変調をか
け、受信側端局において前記特性周波数を復調して受信
したシステムの番号を判別することを特徴とする光海底
中継方式。In an optical submarine relay system that transmits multiple systems with uplink and downlink optical fiber pairs as one system, phase modulation of a specific frequency that is different for each of the multiple systems is applied, and the characteristic frequency is modulated at the receiving end station. An optical submarine relay system that is characterized by demodulating and determining the number of the received system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2026688A JPH03230629A (en) | 1990-02-05 | 1990-02-05 | Optical submarine relay system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2026688A JPH03230629A (en) | 1990-02-05 | 1990-02-05 | Optical submarine relay system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03230629A true JPH03230629A (en) | 1991-10-14 |
Family
ID=12200337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2026688A Pending JPH03230629A (en) | 1990-02-05 | 1990-02-05 | Optical submarine relay system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03230629A (en) |
-
1990
- 1990-02-05 JP JP2026688A patent/JPH03230629A/en active Pending
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