JPH01223838A - Ordering communication system for optical submarine relay system - Google Patents

Abstract

PURPOSE:To facilitate the build-up of the ordering communication with the digital communication system by sending continuously an optical pulse subject to phase modulation by a voice signal to an optical submarine cable and allowing the reception side to apply phase demodulation to the pulse and to reproduce it into a voice signal. CONSTITUTION:Since the period of an output pulse of a sender side pulse oscillator 6a is synchronized with the clock signal period, when the output signal of a modulator 5a is used for the clock signal, the period of the output pulse is fluctuated proportional to the amplitude of the voice signal. The output pulse of the pulse oscillator 6a is converted into an optical pulse by an electrooptic converter 8a at the sender side and sent to a submarine cable 2 and propagated through an optical fiber in the cable 2. The optical pulse is subjected to waveform distortion in the optical fiber an recovered by an optical submarine repeater 1, reaches an phtoelectric converter 9b at the receiver side and is converted into an electric signal by a converter 9b. Then only timewise jitter component of the pulse is extracted by a demodulator 7b as a voltage. Thus, the output of the demodulator 7b is connected to the receiver side telephone set 3b to reproduce the input voice of the sender side telephone set 3b.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は光海底ケーブルシステムにおける打ち合せ通信
方式に関し、特に端局障害時の一時的な通信あるいは布
設工事の際の布設船と端局間の通信における打ち合せ通
信方式に関する。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a meeting communication system in an optical submarine cable system, particularly for temporary communication in the event of a terminal failure or between a laying ship and a terminal station during installation work. Concerning a meeting communication method in communication.

（従来技術） この種の光海底ゲーブルシステムにおける通信方式は、
従来、音声信号の符号化、復号化、パルスの挿入・再配
列等の手段を用いて行っていた。(Prior art) The communication method in this type of optical submarine cable system is
Conventionally, this has been done using means such as encoding and decoding the audio signal, and inserting and rearranging pulses.

従来の方式を第２図を参照して説明すれば、一方の電話
器３ａから送出された音声電気信号は、打ち合せ通信装
置１０ａにより８ＫＨ２でサンプリングされ、１サンプ
リング当り８ピントのパルス列に符号化されて６４　Ｋ
　ｂ　／　ｓのパルス列となり、光端局装置１１ａに送
られる。光端局装置１１ａではＡ１から入力されたＰＣ
Ｍ多重化一般通信信号のパルス列と前記通信製Ｎ　１０
　ａの出力パルス列を時系列的に再配列し、さらに光パ
ルス信号に変換して光海底ケーブル２に送出する。光海
底ケーブル２に送出された光パルス信号は、光海底ケー
ブル内に配置された光海底中継器１で再生され、他方の
端局装置１１ｂに達する。この他方の端局袋Ｗ　１　ｌ
　ｂでは、入力された光パルスを電気信号に変換し、一
般の通信信号をＢ２に送出するとともに、打ち合せ通信
の６４　Ｋ　ｂ　／　ｓのパルス列を抽出し、前記打ち
合せ通信装置１０ａで行った符号化とは逆の操作で通信
装置１０ｂにて復号化し、音声信号を再生する。こうし
て再生された音声信号は電話器３ｂで可聴音声として送
出される。To explain the conventional system with reference to FIG. 2, an audio electrical signal sent from one telephone 3a is sampled at 8KH2 by a meeting communication device 10a, and encoded into a pulse train of 8 pints per sampling. 64K
This becomes a b/s pulse train and is sent to the optical terminal equipment 11a. In the optical terminal equipment 11a, the PC input from A1
Pulse train of M multiplexed general communication signal and N10 made by the above-mentioned communication company
The output pulse train of a is rearranged in time series, further converted into an optical pulse signal, and sent to the optical submarine cable 2. The optical pulse signal sent to the optical submarine cable 2 is regenerated by the optical submarine repeater 1 disposed within the optical submarine cable, and reaches the other end station 11b. This other terminal bag W 1 l
In b, the input optical pulse is converted into an electrical signal, a general communication signal is sent to B2, and a 64 Kb/s pulse train of the meeting communication is extracted and encoded by the meeting communication device 10a. In the reverse operation, the communication device 10b decodes the audio signal and reproduces the audio signal. The audio signal thus reproduced is sent out as audible audio by the telephone 3b.

（発明が解決しようとする問題点） 上述したように従来の打ち合せ通信装置の機能は、要約
すれば、サンプリング化、符号化、および復号化であり
、光端局装置の機能はパルスの挿入、再配列、および電
気−光変換の機能である。(Problems to be Solved by the Invention) As mentioned above, the functions of conventional meeting communication equipment can be summarized as sampling, encoding, and decoding, and the functions of optical terminal equipment are pulse insertion, It is a function of rearrangement and electro-optical conversion.

いずれの機能も高度技術であり、このような装置の設置
、調整、操作、修理は複雑で多くの時間、労力および熟
練を必要とし、必然的に可搬形として構成したものは今
のところ存在しない。その結果、（イ）海底ケーブルの
布設工事のように端局と充分な端局設備を所有しない布
設船との間の通信の確保、（ロ）端局障害時の一時的な
緊急通信の確保、（ハ）端局システムの建設が未完成の
段階での布設工事の開始、（ニ）海底ケーブルの修理に
おけける修理船と端局間の通信の確保、（ホ）試験実行
中のシステムを用いての通信の確保、などの観点からみ
ると、従来の打ち合せ通信方式は不向きであるという問
題があった。Both functions are highly technical, and the installation, adjustment, operation, and repair of such devices is complex and requires a lot of time, effort, and skill, and as a result, there is currently no portable device available. . As a result, (a) ensuring communication between terminal stations and a laying ship that does not have sufficient terminal equipment, as in the case of submarine cable installation work, and (b) securing temporary emergency communications in the event of terminal station failure. , (c) Starting installation work when the construction of the terminal station system is not completed, (d) Securing communication between the repair ship and the terminal station during submarine cable repair, (e) System under test execution From the perspective of securing communications using the Internet, there was a problem in that the conventional meeting communication method was unsuitable.

本発明は上述の問題に鑑みてなされたものであって、従
来方式のように音声信号の符号化、復号化、パルスの再
配列等は行わず、音声信号で位相変調された光パルスを
連続的に光海底ケーブルに送出し、受信側で前記パルス
を位相復調して原信号である音声信号を再生する打ち合
せ通信方式を提供することにある。The present invention was made in view of the above-mentioned problems, and does not involve encoding, decoding, or rearranging the pulses of the audio signal as in the conventional method, but continuously generates optical pulses that are phase-modulated with the audio signal. The object of the present invention is to provide a meeting communication system in which the pulses are transmitted to an optical submarine cable, and the receiving side phase-demodulates the pulses to reproduce the original audio signal.

（問題点を解決するための手段） 本発明による打ち合せ通信方式は、自局側例えば送信側
においては、パルスのクロック信号を生成する単一正弦
波を発生する発振器と、音声信号を前記発振器の出力信
号で位相変調する変調器と、この変調器出力をクロック
信号として利用しパルスを作り出すパルス発振器と、前
記パルス発振器の出力パルスを光パルスに変換する電気
−光変換器とを有し、他局側即ち受信側においては、受
信した光パルスを電気信号に変換する光−電気変換器と
、変調を受けたパルス列から音声信号成分を抽出する復
調器および電話器とを有して構成されている。(Means for Solving the Problems) In the meeting communication system according to the present invention, on the local station side, for example, on the transmitting side, an oscillator that generates a single sine wave that generates a pulse clock signal, and an oscillator that generates a single sine wave that generates a pulse clock signal, It has a modulator that performs phase modulation with an output signal, a pulse oscillator that uses the output of the modulator as a clock signal to generate pulses, and an electro-optical converter that converts the output pulse of the pulse oscillator into an optical pulse. On the station side, that is, on the receiving side, the system includes an optical-to-electrical converter that converts received optical pulses into electrical signals, a demodulator that extracts audio signal components from the modulated pulse train, and a telephone set. There is.

（実施例） 次に、本発明を実施例について図面を参照しつつ説明す
る。(Example) Next, an example of the present invention will be described with reference to the drawings.

第１図は本発明の実施例に係る光海底ケーブルシステム
の概略図であり、４ａ、４ｂはそれぞれ送信側および受
信側の発振器、５ａ、５ｂは変調器、６ａ、６ｂはパル
ス発振器、７ａ、７ｂは復調器、８ａ、８ｂは電気−光
変換器、９ａ、９ｂは光−電気変換器である。まず送信
側電話器３ａからの音声電気信号は、送信側変調器５ａ
により送信側発振器４ａからの正弦波信号で位相変調さ
れる。その結果、変調器５ａの出力信号の周波数は音声
信号の振巾に比例した変動量で変動する。FIG. 1 is a schematic diagram of an optical submarine cable system according to an embodiment of the present invention, in which 4a and 4b are transmitting and receiving side oscillators, 5a and 5b are modulators, 6a and 6b are pulse oscillators, 7a, 7b is a demodulator, 8a and 8b are electrical-optical converters, and 9a and 9b are optical-electrical converters. First, the audio electrical signal from the transmitting side telephone 3a is transmitted to the transmitting side modulator 5a.
The signal is phase-modulated by the sine wave signal from the transmitter oscillator 4a. As a result, the frequency of the output signal of the modulator 5a varies by an amount proportional to the amplitude of the audio signal.

送信側パルス発振器６ａの出力パルスの周期はクロック
信号周期に同期するため、変調器５ａの出力信号をクロ
ック信号に利用すれば前記出力パルスの周期は音声信号
の振巾に比例して変動する。Since the period of the output pulse of the transmitting pulse oscillator 6a is synchronized with the clock signal period, if the output signal of the modulator 5a is used as a clock signal, the period of the output pulse will vary in proportion to the amplitude of the audio signal.

罪ちパルス発振器６ａの出力パルスは音声信号により時
間ジッタを受けたことになる。パルス発振器６ａの出力
パルスは送信側で電気−光変換器８ａにより光パルスに
変換された後、海底ケーブル２に送出され、該ケーブル
２内の光ファイバを伝搬する。前記光パルスは光フアイ
バ内で波形歪を受けるが、光海底中継器１で再生され、
受信側の光−電気変換器９ｂに到達し、該変換器９ｂで
電気信号に変換される。その後、このパルスの時間ジッ
タ成分のみが復調器７ｂにより電圧値よして抽出される
。したがって復調器７ｂの出力を受信側の電話器３ｂに
接続すれば送信側電話器３ａの入力音声が再生できる。The output pulse of the faulty pulse oscillator 6a is subject to time jitter due to the audio signal. The output pulses of the pulse oscillator 6a are converted into optical pulses by an electro-optical converter 8a on the transmitting side, and then sent to the submarine cable 2 and propagated through the optical fiber within the cable 2. The optical pulse undergoes waveform distortion within the optical fiber, but is regenerated by the optical submarine repeater 1,
The signal reaches the optical-to-electrical converter 9b on the receiving side and is converted into an electrical signal by the converter 9b. Thereafter, only the time jitter component of this pulse is extracted as a voltage value by the demodulator 7b. Therefore, by connecting the output of the demodulator 7b to the receiving telephone 3b, the input audio from the transmitting telephone 3a can be reproduced.

第３図（Ａ）〜（Ｆ）は上述の各機器における出力信号
波形を示したものであり、同図（Ａ）は送信側電話器３
ａの出力波形、（Ｂ）は発振器４ａの出力波形、（Ｃ）
は位相変調器５ａの出力波形、（Ｄ）はパルス発振器６
ａの出力波形である。また同図（Ｅ）は光海底ケーブル
２のファイバ内部を伝搬する光パルス波形、（Ｆ）は受
信側の復調器７ｂの出力波形である。FIGS. 3(A) to 3(F) show the output signal waveforms of each of the above-mentioned devices, and FIG. 3(A) shows the output signal waveform of the transmitting side telephone 3.
Output waveform of a, (B) output waveform of oscillator 4a, (C)
is the output waveform of the phase modulator 5a, (D) is the pulse oscillator 6
This is the output waveform of a. Further, (E) in the figure shows an optical pulse waveform propagating inside the fiber of the optical submarine cable 2, and (F) shows an output waveform of the demodulator 7b on the receiving side.

（発明の効果） 以上説明したように本発明によれば、音声信号で位相変
調された光パルスを連続的に光海底ケーブルに送出し、
受信側で前記パルスを位相復調し音声信号に再生するの
で、光海底ケーブルシステムを含むディジクル通信方式
での打ち合せ通信の構築が容易に実現でき、結果として
従来方式では困難とされていた、（イ）布設工事中の端
局と布設船との間の通信、（ロ）端局障害時の一時的な
緊象、通信、（ハ）端局システムが未建設時の布設工事
、（ニ）海底ケーブルの修理時における修理船と端局間
の通信、（ホ）試験実行中のシステムを用いての通信、
などが可能となる。なお本発明では、各部の構成を市販
の測定器類を組み合せて実現することができるという点
でも効果がある。(Effects of the Invention) As explained above, according to the present invention, optical pulses phase-modulated by an audio signal are continuously sent to an optical submarine cable,
Since the pulse is phase-demodulated on the receiving side and regenerated into an audio signal, it is easy to establish a meeting communication using a digital communication system including an optical submarine cable system. ) Communication between the terminal station and the cable laying ship during installation work, (b) Temporary emergencies and communications in the event of terminal station failure, (c) Laying work when the terminal station system has not yet been constructed, (d) Undersea Communication between the repair ship and the terminal station during cable repair, (e) Communication using the system during test execution,
etc. become possible. The present invention is also effective in that the configuration of each part can be realized by combining commercially available measuring instruments.

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

第１図は本発明の実施例に係る光海底ケーブルシステム
の概略図、第２図は従来の光海底ケーブルシステムの概
略図、第３図は第１図に示す実施例の各部の出力点での
信号波形を示した図である。 １・・・光海底中継器、２・・・光海底ケーブル、３ａ
、３ｂ・・・電話器、！１１　ａ、４　ｂ・・・発振器
、５ａ、５ｂ・・・変調器、６ａ、６ｂ・・・パルス発
振器、７ａ、７ｂ・・・復調器、８　ａ　＋　８　ｂ・
・・電気−光変換器、９ａ、９ｂ・・・光−電気変換器
、 １０ａ、１０ｂ・・・打ち合せ通信装置、１１ａ、ｌｌ
ｂ・・・光端局装置。 代理人　　弁理士　　染　川　利　吉 第１ −２しFigure 1 is a schematic diagram of an optical submarine cable system according to an embodiment of the present invention, Figure 2 is a schematic diagram of a conventional optical submarine cable system, and Figure 3 shows the output points of each part of the embodiment shown in Figure 1. FIG. 2 is a diagram showing a signal waveform of 1... Optical submarine repeater, 2... Optical submarine cable, 3a
, 3b...telephone,! 11 a, 4 b... oscillator, 5 a, 5 b... modulator, 6 a, 6 b... pulse oscillator, 7 a, 7 b... demodulator, 8 a + 8 b.
...Electric-optical converter, 9a, 9b... Optical-electrical converter, 10a, 10b... Meeting communication device, 11a, ll
b...Optical terminal equipment. Agent Patent Attorney Toshiyoshi Somekawa 1st - 2nd

Claims (1)

【特許請求の範囲】[Claims] 光海底中継器を有する光海底ケーブルシステムにおいて
、自局側に、音声信号を電気信号に変換する電話器と、
単一正弦波信号を発振する発振器と、前記電話器の出力
信号を前記発振器の出力信号で位相変調する変調器と、
前記変調器の出力信号をクロック信号として受信しパル
ス信号を生成するパルス発振器と、前記パルス発振器の
出力パルスを光信号に変換し光パルスとして光海底ケー
ブルに送出する電気−光変換器とを有し、他局側に、前
記光海底ケーブルを介して伝搬されてきた光パルスを電
気信号に変換する光−電気変換器と、前記光−電気変換
器の出力信号を復調し音声信号成分を抽出する復調器と
、前記復調器の出力信号を音声に変換する電話器とを有
し、音声信号で位相変調された光パルスを連続的に光海
底ケーブルに送出し、受信側で前記光パルスを位相復調
し原信号の音声信号を再生することを特徴とする打ち合
せ通信方式。In an optical submarine cable system having an optical submarine repeater, a telephone device on the own station side that converts voice signals into electrical signals,
an oscillator that oscillates a single sine wave signal; a modulator that phase modulates the output signal of the telephone with the output signal of the oscillator;
It has a pulse oscillator that receives the output signal of the modulator as a clock signal and generates a pulse signal, and an electrical-to-optical converter that converts the output pulse of the pulse oscillator into an optical signal and sends it as an optical pulse to an optical submarine cable. Then, on the other station side, there is provided an optical-to-electrical converter that converts the optical pulse propagated through the optical submarine cable into an electrical signal, and an optical-to-electrical converter that demodulates the output signal of the optical-to-electrical converter and extracts an audio signal component. The device includes a demodulator that converts the output signal of the demodulator into audio, and continuously sends optical pulses phase-modulated with the audio signal to an optical submarine cable, and receives the optical pulses on the receiving side. A meeting communication method characterized by phase demodulating and reproducing the original audio signal.