JPH04213249A - Method of connecting data transmission line and data transmission line connected by using the method - Google Patents
Method of connecting data transmission line and data transmission line connected by using the methodInfo
- Publication number
- JPH04213249A JPH04213249A JP2400828A JP40082890A JPH04213249A JP H04213249 A JPH04213249 A JP H04213249A JP 2400828 A JP2400828 A JP 2400828A JP 40082890 A JP40082890 A JP 40082890A JP H04213249 A JPH04213249 A JP H04213249A
- Authority
- JP
- Japan
- Prior art keywords
- data transmission
- transmission line
- speed
- high speed
- speed data
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 230000003287 optical effect Effects 0.000 abstract description 10
- 239000013307 optical fiber Substances 0.000 abstract description 9
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 230000008054 signal transmission Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Small-Scale Networks (AREA)
- Communication Control (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、光ファイバ等を使った
高速のデータ伝送ができる高速データ伝送路に低速デー
タ伝送路を接続する方法、およびこのようにして接続さ
れたデータ伝送路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of connecting a low-speed data transmission line to a high-speed data transmission line capable of high-speed data transmission using an optical fiber or the like, and to a data transmission line connected in this manner.
【0002】0002
【従来の技術】通常、データ伝送路において高速のディ
ジタル信号を伝送する場合、光のような高速伝送媒体が
必要であり、各中継端末局において信号処理をする場合
にも、光を取り扱う光分岐器、光電変換器等の高価で複
雑な素子が必要となる。このような高速のデータ伝送路
に、限られた地域内、例えば工場内でデータ伝送路を接
続する場合、データ伝送路として経済上の理由から、光
ファイバ等の高速伝送路でなく、メタリックケーブル等
の低速伝送路を用いたい場合がある。メタリックケーブ
ル等の低速伝送路を用いれば、上記のような高価な素子
は必要でなくなり、一般に使用される電子素子のみで足
りるからである。[Background Art] Normally, when transmitting high-speed digital signals on a data transmission line, a high-speed transmission medium such as light is required, and when signal processing is performed at each relay terminal station, an optical branch that handles light is required. This requires expensive and complicated elements such as photoelectric converters and photoelectric converters. When connecting a data transmission line to such a high-speed data transmission line within a limited area, such as within a factory, it is necessary to use metallic cable instead of optical fiber or other high-speed transmission line for economical reasons. There are cases where it is desired to use a low-speed transmission line such as This is because if a low-speed transmission line such as a metallic cable is used, the above-mentioned expensive elements are no longer necessary, and only commonly used electronic elements are sufficient.
【0003】0003
【発明が解決しようとする課題】しかし、メタリックケ
ーブル等の低速伝送路を光ファイバ等の高速伝送路に単
に接続するだけでは、伝送網の信号伝送速度は当然のこ
とながら低速伝送路の上限伝送速度で決定されてしまい
、システム全体の信号伝送速度は低下する。そこで本発
明は、低速のデータ伝送路であっても、システムの信号
伝送速度を低下させることなく、高速データ伝送路に接
続することができる方法およびこのようにして接続され
たデータ伝送路を提供することを目的とする。[Problems to be Solved by the Invention] However, simply connecting a low-speed transmission line such as a metallic cable to a high-speed transmission line such as an optical fiber will naturally limit the signal transmission speed of the transmission network to the upper limit of the low-speed transmission line. The signal transmission speed of the entire system decreases. Therefore, the present invention provides a method that allows even a low-speed data transmission path to be connected to a high-speed data transmission path without reducing the signal transmission speed of the system, and a data transmission path connected in this way. The purpose is to
【0004】0004
【課題を解決するための手段】上記の目的を達成するた
めの本発明のデータ伝送路の接続方法は、高速データ伝
送路を伝送するディジタル信号に対してシリアル/パラ
レル変換を施し、そのパラレル変換をされたデータを複
数本数の低速データ伝送路に接続する方法である。[Means for Solving the Problems] The data transmission line connection method of the present invention to achieve the above object performs serial/parallel conversion on digital signals transmitted through a high-speed data transmission line, and performs the parallel conversion. This method connects the transmitted data to multiple low-speed data transmission lines.
【0005】また、本発明のデータ伝送路は、高速デー
タ伝送路をループ状に設け、伝送中のディジタル信号に
対してシリアル/パラレル変換を施す変換回路を、この
高速データ伝送路途中の両端にそれぞれ設け、パラレル
変換されたデータを伝送する複数本数の低速データ伝送
路の両端を上記各変換回路に接続して構成したものであ
る。Furthermore, the data transmission line of the present invention has a high-speed data transmission line arranged in a loop, and a conversion circuit for performing serial/parallel conversion on the digital signal being transmitted is installed at both ends of the high-speed data transmission line. A plurality of low-speed data transmission lines are provided, respectively, and both ends of a plurality of low-speed data transmission lines for transmitting parallel-converted data are connected to each of the conversion circuits.
【0006】[0006]
【作用】上記の構成のデータ伝送路の接続方法によれば
、高速データ伝送路を伝送するディジタル信号に対して
シリアル/パラレル変換を施すことにより、高速で伝送
されるデータを、その内容を損なわずに低速に落とすこ
とができる。そして、そのパラレル変換をされたデータ
を複数本数の低速データ伝送路に接続してそのまま送り
出し、低速で伝送することができる。この場合、データ
はシリアル/パラレル変換されているので、全体のデー
タ伝送路の伝送速度が低下することはない。[Operation] According to the method for connecting the data transmission line with the above configuration, by performing serial/parallel conversion on the digital signal transmitted on the high-speed data transmission line, the data transmitted at high speed is damaged. You can slow down to low speed without any problems. Then, the parallel-converted data can be connected to a plurality of low-speed data transmission lines and sent out as is, allowing low-speed transmission. In this case, since the data is serial/parallel converted, the transmission speed of the entire data transmission path does not decrease.
【0007】また、本発明のデータ伝送路によれば、伝
送中のディジタル信号に対してシリアル/パラレル変換
を施す変換回路を、ループ状の高速データ伝送路途中の
両端にそれぞれ設け、パラレル変換されたデータを伝送
する低速データ伝送路の両端を上記各変換回路に接続し
て構成したので、ループ状の高速データ伝送路に、低速
データ伝送路を用いたループを、高速データ伝送路の伝
送速度を落とさないで付加することができる。Further, according to the data transmission path of the present invention, conversion circuits that perform serial/parallel conversion on digital signals being transmitted are provided at both ends of the loop-shaped high-speed data transmission path, so that parallel conversion is performed. Since both ends of the low-speed data transmission line that transmits the data are connected to each of the conversion circuits described above, a loop using the low-speed data transmission line is connected to the loop-shaped high-speed data transmission line, and the transmission speed of the high-speed data transmission line is can be added without dropping.
【0008】[0008]
【実施例】以下実施例を示す添付図面によって詳細に説
明する。図1は、中継局S1,S2,S3 を含む光フ
ァイバケーブルFからなる高速データ伝送路(以下「高
速光LAN」という)を伝送するディジタル信号に対し
てシリアル/パラレル変換を施し、そのパラレル変換を
されたデータを中継局T1,T2,T3,T4 をつな
ぐ複数本数のメタリックケーブルMすなわち複数本数の
低速データ伝送路(以下「支線LAN」という)からな
る伝送路に接続した場合の構成を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples will be explained in detail below with reference to the accompanying drawings showing examples. Figure 1 shows serial/parallel conversion of digital signals transmitted through a high-speed data transmission line (hereinafter referred to as "high-speed optical LAN") consisting of optical fiber cables F including relay stations S1, S2, and S3, and the parallel conversion. This figure shows a configuration in which the transmitted data is connected to a transmission line consisting of a plurality of metallic cables M connecting relay stations T1, T2, T3, and T4, that is, a plurality of low-speed data transmission lines (hereinafter referred to as "branch LAN"). .
【0009】高速光LANは、この実施例では約100
Mbps の速度でデータを送るもので、支線LANは
、約10Mbpsの速度でデータを送ることができるも
のである。したがって、両伝送路を接続する場合、速度
変換をする必要があるので、高速光LANの中継局S1
に変換回路を設けている。この変換回路は、図2に示
すように、それぞれ10ビットのシフトレジスタB1,
B2 等からなるもので、光ファイバケーブルFを通し
て送られた100Mbps の高速シリアルデータ(時
間的に1ビットずつ伝送されるデータ)は変換器O/E
により電気信号に変換され、この変換された電気信号
はシフトレジスタB1 に入力され、10ビットのパラ
レルデータ(2以上の伝送路に分割され同時に伝送され
るデータ)として取り出され、支線LANにそれぞれ入
力される。[0009] In this embodiment, the high-speed optical LAN is about 100
Data is sent at a speed of Mbps, and the branch LAN can send data at a speed of about 10 Mbps. Therefore, when connecting both transmission lines, it is necessary to convert the speed, so the relay station S1 of the high-speed optical LAN
A conversion circuit is provided. As shown in FIG. 2, this conversion circuit consists of 10-bit shift registers B1,
B2, etc., and the 100Mbps high-speed serial data (data transmitted one bit at a time) sent through the optical fiber cable F is sent to the converter O/E.
This converted electrical signal is input to the shift register B1, taken out as 10-bit parallel data (data that is divided into two or more transmission lines and transmitted simultaneously), and input to each branch LAN. be done.
【0010】したがって、支線LANを伝送するデータ
の速度は1/10の10Mbpsに低下しているので、
支線LANを支障なく通過することができる。支線LA
Nを一巡して帰ってきたパラレル信号は、シフトレジス
タB2により100Mbps のシリアル信号にふたた
び変換され、変換器E/O により光信号に変換され光
ファイバケーブルFを通して次の局に送られる。[0010] Therefore, the speed of data transmitted over the branch LAN has decreased to 1/10, 10 Mbps, so
It is possible to pass through the branch LAN without any problem. Branch line LA
The parallel signal that has returned after going around N is converted again into a 100 Mbps serial signal by shift register B2, converted into an optical signal by converter E/O, and sent to the next station via optical fiber cable F.
【0011】以上のように構成したので、光ファイバケ
ーブルFを伝送するデータの速度は低下させずに、伝送
速度の遅い支線LANを高速光LANに接続し、データ
伝送させることができる。[0011] With the above configuration, a branch LAN with a slow transmission speed can be connected to a high-speed optical LAN for data transmission without reducing the speed of data transmitted through the optical fiber cable F.
【0012】0012
【発明の効果】以上のように、本発明のデータ伝送路の
接続方法によれば、高速データ伝送路を伝送するディジ
タル信号に対してシリアル/パラレル変換を施し、その
パラレル変換をされたデータを複数本数の低速データ伝
送路に接続することにより、全体としてデータ伝送速度
を落とすことなく、高速データ伝送路と低速データ伝送
路とのスムーズな接続が可能になる。As described above, according to the data transmission path connection method of the present invention, serial/parallel conversion is performed on digital signals transmitted through a high-speed data transmission path, and the parallel-converted data is By connecting to a plurality of low-speed data transmission paths, it is possible to smoothly connect the high-speed data transmission path and the low-speed data transmission path without reducing the overall data transmission speed.
【0013】また、本発明のデータ伝送路によれば、シ
リアル/パラレル変換回路を、ループ状の高速データ伝
送路途中の両端にそれぞれ設け、パラレル変換されたデ
ータを伝送する低速データ伝送路の両端を上記各変換回
路に接続して構成したので、ループ状の高速データ伝送
路の伝送速度を落とさないで低速データ伝送路を用いた
ループを付加し利用することができる。しかも、この低
速データ伝送路を構成する線路や素子に、低速伝送に対
応したものを使用することができ、全体のコストダウン
を図ることができる。Further, according to the data transmission line of the present invention, serial/parallel conversion circuits are provided at both ends of the loop-shaped high-speed data transmission line, and both ends of the low-speed data transmission line for transmitting parallel-converted data are provided. Since the converter is connected to each of the conversion circuits described above, a loop using a low-speed data transmission path can be added and used without reducing the transmission speed of the loop-shaped high-speed data transmission path. Furthermore, the lines and elements constituting this low-speed data transmission line can be compatible with low-speed transmission, and the overall cost can be reduced.
【図1】シリアル/パラレル変換手法を用いて高速光L
ANに支線LANを接続した伝送路の構成を示す図であ
る。[Figure 1] High-speed optical L using serial/parallel conversion method
FIG. 2 is a diagram showing the configuration of a transmission line in which a branch LAN is connected to an AN.
【図2】高速光LANの中継局に設置されたシリアル/
パラレル変換回路の構成を示すブロック図である。[Figure 2] Serial/
FIG. 2 is a block diagram showing the configuration of a parallel conversion circuit.
B1,B2 シフトレジスタ、 F 光ファイバケーブル、 M メタリックケーブル、 B1, B2 shift register, F Optical fiber cable, M metallic cable,
Claims (2)
号に対してシリアル/パラレル変換を施し、そのパラレ
ル変換をされたデータを複数本数の低速データ伝送路に
接続するデータ伝送路の接続方法。1. A method for connecting a data transmission line, which performs serial/parallel conversion on a digital signal transmitted over a high-speed data transmission line, and connects the parallel-converted data to a plurality of low-speed data transmission lines.
中のディジタル信号に対してシリアル/パラレル変換を
施す変換回路を、この高速データ伝送路途中の両端にそ
れぞれ設け、パラレル変換されたデータを伝送する複数
本数の低速データ伝送路の両端を上記各変換回路に接続
してなることを特徴とする、データ伝送路の接続方法を
用いて接続されたデータ伝送路。Claim 2: A high-speed data transmission path is provided in a loop, and conversion circuits that perform serial/parallel conversion on the digital signal being transmitted are provided at both ends of the high-speed data transmission path, and the parallel-converted data is 1. A data transmission line connected using a data transmission line connection method, characterized in that both ends of a plurality of low-speed data transmission lines for transmitting the data are connected to each of the conversion circuits.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2400828A JPH04213249A (en) | 1990-12-07 | 1990-12-07 | Method of connecting data transmission line and data transmission line connected by using the method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2400828A JPH04213249A (en) | 1990-12-07 | 1990-12-07 | Method of connecting data transmission line and data transmission line connected by using the method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04213249A true JPH04213249A (en) | 1992-08-04 |
Family
ID=18510705
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2400828A Pending JPH04213249A (en) | 1990-12-07 | 1990-12-07 | Method of connecting data transmission line and data transmission line connected by using the method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04213249A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7424227B2 (en) | 1999-07-15 | 2008-09-09 | Fujitsu Limited | Optical repeater converting wavelength and bit rate between networks |
-
1990
- 1990-12-07 JP JP2400828A patent/JPH04213249A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7424227B2 (en) | 1999-07-15 | 2008-09-09 | Fujitsu Limited | Optical repeater converting wavelength and bit rate between networks |
US7522843B2 (en) | 1999-07-15 | 2009-04-21 | Fujitsu Limited | Optical repeater converting wavelength and bit rate between networks |
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