JPS63171034A - Method for turning back optical signal on u type optical transmission line - Google Patents
Method for turning back optical signal on u type optical transmission lineInfo
- Publication number
- JPS63171034A JPS63171034A JP62002329A JP232987A JPS63171034A JP S63171034 A JPS63171034 A JP S63171034A JP 62002329 A JP62002329 A JP 62002329A JP 232987 A JP232987 A JP 232987A JP S63171034 A JPS63171034 A JP S63171034A
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- Japan
- Prior art keywords
- optical
- optical transmission
- signal
- transmission line
- repeater
- Prior art date
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- 230000003287 optical effect Effects 0.000 title claims abstract description 134
- 230000005540 biological transmission Effects 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims description 10
- 230000002463 transducing effect Effects 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 241000272201 Columbiformes Species 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔概要〕
光信号による衝突検出機能付き搬送波感知多重アクセス
通信方式（Ｃａｒｒｉｅｒ ５ｅｎｓｅ Ｍｕｌｔｉｐ
ｌｅ Ａｃｃｅｓｓ ／Ｃｏ１１ｉｓｉｏｎ Ｄｅｔｅ
ｃｔｉｏｎ−、以下Ｃ３ＭＡ／ＣＤ通信方式と称する）
において、特に小規模構成におけるシステムコストの低
減を図るために、光中継器に双方向折り返し機能を付加
することにより１．安価に小規模システムが構成できる
ようにしたものである。[Detailed Description of the Invention] [Summary] Carrier sensing multiple access communication system with collision detection function using optical signals (Carrier 5ense Multi-access communication system)
le Access /Co11ision Dete
(hereinafter referred to as C3MA/CD communication method)
In order to reduce the system cost, especially in a small-scale configuration, we added a bidirectional folding function to the optical repeater. This allows a small-scale system to be constructed at low cost.
本発明は、光信号によるＣ３ＭＡ／ＣＤ通信方弐を用い
た伝送系におけるＵ字型光伝送路の光信号折り返し方法
の改良に関するものである。The present invention relates to an improvement of an optical signal return method of a U-shaped optical transmission line in a transmission system using a C3MA/CD communication method using optical signals.
この際、システムコストの点からより少ない光中継器の
数でより多くの端末を接続して使用できるシステムであ
ることが望ましい。In this case, from the viewpoint of system cost, it is desirable to have a system that can connect and use a larger number of terminals with a smaller number of optical repeaters.
第３図は従来例の光信号折り返し方法を使用したシステ
ムの構成を示すブロック図である。FIG. 3 is a block diagram showing the configuration of a system using a conventional optical signal folding method.
第３図は、光伝送路１０の送信側伝送路に１５台の光カ
ブラ（５−１、〜、５−１５）を挿入し、受信側伝送路
に同じ＜１５台の光カプラ（５−１６、〜、５−３０）
を挿入している。そして端末装！（７−１、〜、？−１
５）から出力した電気信号を光トランシーバ（６−１、
〜、１５）内の電気／光変換部（以下Ｅ１０と称する）
で光信号に変換して、上記の送信側の光カプラ（５−１
、〜、５−′Ｌ５） ４“加えている。FIG. 3 shows that 15 optical couplers (5-1, 5-15) are inserted into the transmitting side transmission line of the optical transmission line 10, and the same <15 optical couplers (5-15) are inserted into the receiving side transmission line. 16, ~, 5-30)
is inserted. And terminal equipment! (7-1, ~, ?-1
5) to the optical transceiver (6-1,
, 15) (hereinafter referred to as E10)
Convert it to an optical signal and connect it to the optical coupler (5-1) on the transmitting side.
, ~, 5-'L5) 4" is added.
一方、受信側の光カプラ（５−１６、〜、５−３０）で
は、光伝送路１０を伝送する光信号を分岐して、上記光
トランシーバクロー１、〜．６−１５）内の光／電気変
換部（以下０／Ｅと称する）で電気信号に変換し、受信
を希望する端末装置（７−１、〜、７−１５）で受信す
る。On the other hand, the receiving-side optical couplers (5-16, . The signal is converted into an electrical signal by an optical/electrical converter (hereinafter referred to as 0/E) in 6-15), and is received by a terminal device (7-1 to 7-15) that desires to receive the signal.
光伝送路１０の光ファイバの伝送損失や光カブラの挿入
損失により、伝送する光信号のパルス波形が劣化し、受
信する端末装置においてエラーレートが増大するのを防
ぐため、光伝送路１０の途中に光中継器３を挿入してい
る。In order to prevent the pulse waveform of the transmitted optical signal from deteriorating due to the transmission loss of the optical fiber of the optical transmission line 10 and the insertion loss of the optical coupler, and from increasing the error rate at the receiving terminal device, An optical repeater 3 is inserted in the
今の場合、送信側に挿入した１組のＯ／Ｅ３５とＥ１０
３６で１０台の光カブラ（５−１１、〜、５−２０）
（端末装置の台数は５台）をサポートできると想定し
ている。同様に受信側に挿入したＥ ／ ０３７とＯ／
Ｅ３８でも１０台の光カプラ（５−２１、〜、５−３０
） （端末装置の台数は１０台）をサポートしている。In this case, a pair of O/E35 and E10 inserted on the sending side
36 and 10 optical converters (5-11, ~, 5-20)
(The number of terminal devices is 5) is assumed to be supported. Similarly, E/037 and O/ inserted on the receiving side.
E38 also has 10 optical couplers (5-21, ~, 5-30
) (The number of terminal devices is 10).
つまり、１台の光中継器３“により１５台の端末装置、
をサポートしていることになる。In other words, one optical repeater 3" can connect 15 terminal devices,
This means that it supports
次に第３図に示すシステムの動作を説明する。Next, the operation of the system shown in FIG. 3 will be explained.
例えば端末装置７−１が端末装置７−１５と信号のやり
とりを希望するとする。この鳩舎、光トランシーバ６−
１から受信データが何も無い、即ち光伝送路１０が空い
ているということを端末装置７−１が検知すると、送信
側の端末装置７−１が送信データを出力し、光トランシ
ーバ６−１のＥｌｏにより光信号に変えられ、光カプラ
５−１を介して光伝送路１０に加えられる。そして光中
継器３″のＯ／Ｅ３５で、光信号のパルス波形が例えば
ＰＩＮホトダイオード等により電気信号のパルス波形に
変換され、波形整形され増幅された後、Ｅ１０３６で発
光ダイオード等により再び光信号のパルス波形に変換さ
れて出力される。そして折り返し部にて受信側伝送路に
折り返され、光カブラ５−１６により分岐されて、光ト
ランシーバ６−１５内のＯ／Ｅで電気信号に変換され、
端末装置７−１５で受信される。For example, assume that the terminal device 7-1 desires to exchange signals with the terminal device 7-15. This pigeon house, optical transceiver 6-
When the terminal device 7-1 detects that there is no received data from the optical transceiver 6-1, that is, the optical transmission line 10 is empty, the transmitting-side terminal device 7-1 outputs the transmitted data, and the optical transceiver 6-1 The signal is converted into an optical signal by Elo, and is added to the optical transmission line 10 via the optical coupler 5-1. Then, at O/E35 of the optical repeater 3'', the pulse waveform of the optical signal is converted into an electric signal pulse waveform by, for example, a PIN photodiode, and after the waveform is shaped and amplified, at E1036, the optical signal is converted again by a light emitting diode, etc. It is converted into a pulse waveform and output.Then, it is looped back to the reception side transmission line at the folding section, branched by the optical coupler 5-16, and converted into an electrical signal by the O/E in the optical transceiver 6-15.
It is received by the terminal device 7-15.
端末装置７−１５から端末装置７−１に向けて信号を送
る場合も、上記の径路と類似の径路をたどって行われる
。When sending a signal from the terminal device 7-15 to the terminal device 7-1, the signal is also sent along a route similar to the above-described route.
尚、光信号を受信する場合、受信側の光カプラ（５−１
６、〜、５−３０）を介してどの端末装置でも希望すれ
ば受信できるようになっている。In addition, when receiving optical signals, the receiving side optical coupler (5-1
6, -, 5-30), any terminal device can receive it if desired.
しかしながら上述の光信号折り返し方法においては、１
台の光中継器でサポートできる端末装置の台数が少なく
、特に小規模システムにおいては、システムコストの上
昇という問題点を生じていた。However, in the optical signal folding method described above, 1
The number of terminal devices that can be supported by one optical repeater is small, and this poses a problem of increased system costs, especially in small-scale systems.
上記問題点は第１図に示すように、送信側と受信側が折
り返し部を境に分離された２組の光伝送路１及び２と、
光伝送路１及び２に挿入し、光信号を分岐し、あるいは
挿入するための光カプラ５−１、〜５−ｎと、光カプラ
５−１、〜．５−ｎに接続され、電気信号を光信号に変
換し、光信号を電気信号に変換する機能を有する光トラ
ンシーバ６−１、〜．６−ｍと、光トランシーバ６−１
、〜．６−ｍに接続・され、光伝送路１及び２の使用状
態を監視し、かつ信号の送受を行う端末装置７−１、〜
．７−ｍとから成る光伝送系の、光伝送路１と２の折り
返し部を対向させて、光伝送路１と壱の折り返し部に光
伝送路１あるいは２の光信号を増幅する、光伝送路１及
び２に共通の光中継器３を挿入し、光中継器３内に２つ
の入力の論理和を求めて出力する論理和回路４を設け、
光伝送路１あるいは２の送信側の信号を、論理和回路４
を介して光伝送路１及び２の受信側へ出力するように構
成した本発明〔作用〕
第１図において、例えば端末装置７−１から出力した信
号は光トランシーバ６−１で光信号に変換され、光カブ
ラ５−１を介して光伝送路１の送信側に伝送される。そ
してこの光伝送路１の折り返し部に接続した光中継器３
の光／電気変換部で電気信号に変換され、論理和回路４
に入力される。論理和回路４の出力は、同光中継器３の
電気／光変換部を介して光伝送路１、及び２の受信側に
伝送される。The above problem is caused by two sets of optical transmission lines 1 and 2, in which the transmitting side and the receiving side are separated by a folding part, as shown in FIG.
Optical couplers 5-1, . Optical transceivers 6-1, . 6-m and optical transceiver 6-1
, ~. 6-m, terminal devices 7-1, which monitor the usage status of optical transmission lines 1 and 2, and send and receive signals;
．． An optical transmission system in which the folded parts of optical transmission lines 1 and 2 of an optical transmission system consisting of 7-m are made to face each other, and the optical signal of optical transmission line 1 or 2 is amplified at the folded part of optical transmission line 1 and 1. A common optical repeater 3 is inserted into paths 1 and 2, and an OR circuit 4 is provided in the optical repeater 3 to calculate the logical sum of two inputs and output the result.
The signal on the transmitting side of the optical transmission line 1 or 2 is sent to the OR circuit 4.
[Operation] In FIG. 1, for example, a signal output from a terminal device 7-1 is converted into an optical signal by an optical transceiver 6-1. and is transmitted to the transmission side of the optical transmission line 1 via the optical coupler 5-1. And an optical repeater 3 connected to the folded part of this optical transmission line 1
It is converted into an electrical signal by the optical/electrical conversion section of
is input. The output of the OR circuit 4 is transmitted to the receiving side of the optical transmission lines 1 and 2 via the electrical/optical converter of the optical repeater 3.
その結果、受信を希望する相手側の端末装置（例えば光
伝送路２の端末装置７−ｍ）では、光カプラ５−ｍ＋１
と光トランシーバ６−ｍを介してこの信号を受信する。As a result, the terminal device of the other party (for example, the terminal device 7-m of the optical transmission line 2) that desires to receive the signal, the optical coupler 5-m+1
and receives this signal via the optical transceiver 6-m.
第２図は本発明の実施例の光信号折り返し方法を使用し
たシステムの構成を示すブロック図である。FIG. 2 is a block diagram showing the configuration of a system using the optical signal folding method according to the embodiment of the present invention.
全図を通じて同一符号は同一対象物を示す。The same reference numerals indicate the same objects throughout the figures.
第２図において、本発明が従来例と異なる点は光伝送路
１′、及び２′の折り返し部を対向させて、その送信側
と受信側の間に光中継器３′を挿入し、光中継器３′内
に論理和回路４を設けることにより、２個の光伝送路１
′、２′に対し１台の光中継器３′で兼用させたことに
ある。In FIG. 2, the present invention differs from the conventional example by arranging the folded parts of optical transmission lines 1' and 2' to face each other, and inserting an optical repeater 3' between the transmitting side and the receiving side. By providing the OR circuit 4 in the repeater 3', the two optical transmission lines 1
The reason is that one optical repeater 3' is used for both optical relays 3' and 2'.
以下にその動作について説明する。The operation will be explained below.
例えば、端末装置７−１が端末装置７−１〆と信号のや
りとりを希望するとする。この場合、光伝送路２′がも
し使用中であれば光中継器３′内に設けた論理和回路４
の出力が分岐され、光カブラ５−２０、光トランシーバ
６−１を介して端末装置７−１で、光伝送路２′の使用
中であることを検知することができる。For example, assume that the terminal device 7-1 desires to exchange signals with the terminal device 7-1. In this case, if the optical transmission line 2' is in use, the OR circuit 4 provided in the optical repeater 3'
The output of the terminal device 7-1 is branched, and the terminal device 7-1 can detect that the optical transmission line 2' is in use via the optical coupler 5-20 and the optical transceiver 6-1.
光伝送路１′についても同様にして検知することができ
る。The optical transmission line 1' can also be detected in the same manner.
このようにして、光伝送路１′、２′が空いていること
を確認した後、端末装置７−１は送信データを出力し、
光トランシーバ６−１、光カブラ５−１を介して光伝送
路１′に信号を送り、光中継器３′内でＯ／Ｅ３１によ
り電気信号に変換され、論理和回路４に送られる。論理
和回路４では入力した信号を光伝送路１′、及び２′に
分岐して出力し、今の場合、Ｅ１０３４で再び光信号に
変換し、光伝送路２′の光カプラ５−１１、光トランシ
ーバ６−１０’を介して、端末装置７−１０’に送られ
る。端末装置？−１０′ｌＪＸら７−１に信号を送る場
合も同様に行われる。After confirming that the optical transmission lines 1' and 2' are free in this way, the terminal device 7-1 outputs the transmission data,
The signal is sent to the optical transmission line 1' via the optical transceiver 6-1 and the optical coupler 5-1, converted into an electrical signal by the O/E 31 in the optical repeater 3', and sent to the OR circuit 4. The OR circuit 4 branches the input signal to the optical transmission lines 1' and 2' and outputs it. In this case, it is converted into an optical signal again at E1034, and the optical coupler 5-11 of the optical transmission line 2' It is sent to the terminal device 7-10' via the optical transceiver 6-10'. Terminal device? -10'lJX and others 7-1 are sent in the same manner.
即ち、端末装置７−１０’から出力した信号は光トラン
シーバ６−１０’により光信号に変換されて、光カブラ
５−１０を介して光伝送路２′から光中継器３′、論理
和回路４を介して分岐された出力の一方の出力として、
光伝送路１′から光カブラ５−２０、光トランシーバ６
−１を介して、端末装置７−１に送られる。That is, the signal output from the terminal device 7-10' is converted into an optical signal by the optical transceiver 6-10', and is transmitted from the optical transmission line 2' to the optical repeater 3' and the logical sum circuit via the optical coupler 5-10. As one output of the output branched through 4,
From the optical transmission line 1' to the optical coupler 5-20 and the optical transceiver 6
-1 to the terminal device 7-1.
このようにして、例えば端末装置７−１と７−１０’と
の間で通信が行われる。In this way, communication is performed between, for example, the terminal devices 7-1 and 7-10'.
この結果、本実施例の場合１台の光中継器３′により２
０台の端末装置を接続して使用できることになる。As a result, in this embodiment, one optical repeater 3' allows two
This means that 0 terminal devices can be connected and used.
以上説明のように本発明によれば、中継器によりサポー
ト可能な端末数を増やすことができるため、システムコ
ストの低減の効果がある。As described above, according to the present invention, it is possible to increase the number of terminals that can be supported by a repeater, thereby reducing system costs.
第１図は本発明の原理図、
第２図は本発明の実施例の光信号折り返し方法を使用し
たシステムの構成を示すブロ
ック図、
第３図は従来例の光信号折り返し方法を使用したシステ
ムの構成を示すブロック図で
ある。
図において
工、２．１′、２′、１０は光伝送路、３．３′、３″
は光中継器、
３１．３２は光／電気変換部（０／Ｅ）、３３．３４は
電気／光変換部（Ｅｌｏ）、４は論理和回路、
５−１、〜．５−ｎ は光カプラ、
６−１、〜．６−ｍは光トランシーバ、７−１、〜．７
−ｍは端末装置
を示す。Figure 1 is a diagram of the principle of the present invention. Figure 2 is a block diagram showing the configuration of a system using the optical signal loopback method of the embodiment of the present invention. Figure 3 is a system using the conventional optical signal loopback method. FIG. 2 is a block diagram showing the configuration of FIG. In the figure, 2.1', 2', 10 are optical transmission lines, 3.3', 3''
is an optical repeater, 31.32 is an optical/electrical converter (0/E), 33.34 is an electrical/optical converter (Elo), 4 is an OR circuit, 5-1, ~. 5-n is an optical coupler, 6-1, -. 6-m is an optical transceiver, 7-1, . 7
-m indicates a terminal device.
Claims (1)
伝送路（１）及び（２）と、 該光伝送路（１）及び（２）に挿入し、光信号を分岐し
、あるいは挿入するための光カプラ（５−１、〜、５−
ｎ）と、 該光カプラ（５−１、〜、５−ｎ）に接続され、電気信
号を光信号に変換し、光信号を電気信号に変換する機能
を有する光トランシーバ（６−１、〜、６−ｍ）と、該
光トランシーバ（６−１、〜、６−ｍ）に接続され、光
伝送路（１）及び（２）の使用状態を監視し、かつ信号
の送受を行う端末装置（７−１、〜、７−ｍ）とから成
る光伝送系の、 該光伝送路（１）と（２）の折り返し部を対向させて、
該光伝送路（１）と（２）の折り返し部に該光伝送路（
１）あるいは（２）の光信号を増幅する、光伝送路（１
）及び（２）に共通の光中継器（３）を挿入し、該光中
継器（３）内に２つの入力の論理和を求めて出力する論
理和回路（４）を設け、該光伝送路（１）あるいは（２
）の送信側の信号を、該論理和回路（４）を介して該光
伝送路（１）及び（２）の受信側へ出力するように構成
したことを特徴とするＵ字型光伝送路における光信号折
り返し方法。[Claims] Two sets of optical transmission lines (1) and (2) in which a transmitting side and a receiving side are separated by a folding part, and an optical transmission line inserted into the optical transmission lines (1) and (2), Optical couplers (5-1, ~, 5-
n), and an optical transceiver (6-1, to , 6-m) and a terminal device connected to the optical transceiver (6-1, to, 6-m), which monitors the usage status of the optical transmission lines (1) and (2) and sends and receives signals. (7-1, ~, 7-m), with the folded parts of the optical transmission lines (1) and (2) facing each other,
The optical transmission line (
An optical transmission line (1) that amplifies the optical signal of (1) or (2).
) and (2), a common optical repeater (3) is installed in the optical repeater (3), and an OR circuit (4) that calculates the logical sum of the two inputs and outputs the result, and the optical transmission Path (1) or (2
) is configured to output the signal on the transmitting side of the optical transmission line (1) and (2) via the OR circuit (4) to the receiving side of the optical transmission lines (1) and (2). optical signal folding method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62002329A JPH0622349B2 (en) | 1987-01-08 | 1987-01-08 | Optical signal return method in U-shaped optical transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62002329A JPH0622349B2 (en) | 1987-01-08 | 1987-01-08 | Optical signal return method in U-shaped optical transmission line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63171034A true JPS63171034A (en) | 1988-07-14 |
| JPH0622349B2 JPH0622349B2 (en) | 1994-03-23 |
Family
ID=11526269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62002329A Expired - Fee Related JPH0622349B2 (en) | 1987-01-08 | 1987-01-08 | Optical signal return method in U-shaped optical transmission line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0622349B2 (en) |
-
1987
- 1987-01-08 JP JP62002329A patent/JPH0622349B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0622349B2 (en) | 1994-03-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |