JPS58133067A - Local area network system - Google Patents

Local area network system

Info

Publication number
JPS58133067A
JPS58133067A JP1613082A JP1613082A JPS58133067A JP S58133067 A JPS58133067 A JP S58133067A JP 1613082 A JP1613082 A JP 1613082A JP 1613082 A JP1613082 A JP 1613082A JP S58133067 A JPS58133067 A JP S58133067A
Authority
JP
Japan
Prior art keywords
node
loop
stage
terminals
speed
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
Application number
JP1613082A
Other languages
Japanese (ja)
Inventor
Yoshitsugu Watanabe
渡辺　義次
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP1613082A priority Critical patent/JPS58133067A/en
Publication of JPS58133067A publication Critical patent/JPS58133067A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/427—Loop networks with decentralised control
    • H04L12/43—Loop networks with decentralised control with synchronous transmission, e.g. time division multiplex [TDM], slotted rings

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Small-Scale Networks (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

PURPOSE:To accommodate distributed terminals very finely and more efficiently in comparison with accommodating by a node station, by providing a low-speed loop besides a high-speed loop. CONSTITUTION:A node station NS0 is provided with not only a node station remote control part NSRC but also a low-speed loop transmission line L-LOOP and a remote station RS having the line concentrating function. The control part NSRC performs signal processings of terminals similarly to a node station control part NSC and has the function for communication between node stations NS. In the remote station, data is sampled in a speed corresponding to the terminal speed and is put onto a PCM channel by a remote station control part RSC. A part of the PCM channel is used as an out channel to transmit the signal of the terminal. Thus, the local area network system for communication between terminals which are distributed in respective places is constituted efficiently.

Description

【発明の詳細な説明】 （１）発明の分野 本発明はオフィス内の各所に分散配置される各種の端末
間通信に適用するループ状のローカルエリアネットワー
クに関する。DETAILED DESCRIPTION OF THE INVENTION (1) Field of the Invention The present invention relates to a loop-shaped local area network that is applied to communications between various terminals distributed throughout an office.

（２）　　従来技術と問題点 近年端末の°分散配置指向の高まシから効率的に端末を
結合するローカルエリアネットワークの重要性が認識さ
れてきた。(2) Prior Art and Problems In recent years, the importance of local area networks for efficiently connecting terminals has been recognized due to the increasing trend toward distributing terminals.

この種のローカルエリアネットワークには、中央に位置
する制御装置で散在する端末の通信を集中制御するスタ
ー形（従来のＰＢＸがこの例になる）と、ループ状を構
成する分散された制御装置で端末の通信を制御するルー
プ形と、通信の制御をする制御装置を端末側にもち同軸
ケーブルで結ぶだけのプ２ンチ形とがある。This type of local area network has two types of local area networks: a star type (conventional PBX is an example of this), in which a centrally located control unit centrally controls communications between scattered terminals, and a star type, in which a centrally located control unit centrally controls communications between scattered terminals (a conventional PBX is an example of this), and a distributed control unit that forms a loop. There are two types: the loop type, which controls communication at the terminal, and the two-inch type, which has a control device on the terminal side and simply connects it with a coaxial cable.

ループ形のローカルエリアネットワークには比較的大規
模なオフィスに利用され高速伝送路に光フアイバーケー
ブルを利用することができ高速化可能である、ネットワ
ークの同期をとシやすめ、伝送路コストが安い等の利点
がある。Loop-type local area networks are used in relatively large-scale offices, and can use optical fiber cables for high-speed transmission lines, making it possible to increase the speed, eliminating network synchronization, and reducing transmission line costs. There are advantages.

さらにループ形のローカルエリアネットワークはスター
形の個別配線方式に比較して端末間の個別の配線が不要
となゐので工事費の低減、接読経路の簡略化、保守運用
の容易化等トータルで経済的なシステムを構築すること
が可能となるＯ 従来、この種のループ形のローカルエリアネットワーク
は第１図に示すような構成がとられていた。第１図にお
いて本システムは広い地域の各所に分散配置された端末
Ｔを集めるノードステージ■ンＮ８と、ノードステージ
曹ンＮ８間を例えば元ファイバーケーブルを使用して接
続する高速ループ状伝送路Ｈ−ＬＯＯＰから構成される
。ノードステージ冒ンＮ８は「光峠電気」変換部０／１
３　Ｃ０ＮＶと、ノードステージ■ン制御部ＮＳＣと、
回線終端回路ＬＵＴから構成される。「光→電気」変換
部０／Ｂ　Ｃ０ＮＶはノードステージｌノ制御部Ｎ８Ｃ
からの電気信号を伝送路ｌ−１−ＬＯＯＰ上の直列の光
信号へ変換すると共に光信号から電気信号への変換とク
ロックの抽出吟の機能をもつ。ノードステージ璽ンＮ８
は回線終端回路ＬＵＴ経由で各種の速度の多数の回線を
収容しノードステージ習ン制御部Ｎ８Ｃの制御のもとに
指定された回線のデータを伝送路Ｈ−ＬＯＯＰに挿入す
る。また伝送路Ｈ−ＬＯＯＰ。Furthermore, compared to the star-type individual wiring system, the loop-type local area network eliminates the need for individual wiring between terminals, resulting in total benefits such as reduced construction costs, simplified access routes, and easier maintenance and operation. It becomes possible to construct an economical system. Conventionally, this type of loop-type local area network has been configured as shown in FIG. In Figure 1, this system consists of a high-speed loop-shaped transmission line H that connects a node stage N8, which collects terminals T distributed throughout a wide area, and a node stage N8, using, for example, an original fiber cable. - Consists of LOOPs. Node stage adventure N8 is "Light Pass Electric" conversion part 0/1
3 C0NV, node stage controller NSC,
It consists of a line termination circuit LUT. “Optical → Electric” conversion unit 0/B C0NV is node stage l control unit N8C
It has the functions of converting the electrical signal from the LOOP into a serial optical signal on the transmission line l-1-LOOP, converting the optical signal into an electrical signal, and extracting the clock. Node stage seal N8
accommodates a large number of lines of various speeds via the line termination circuit LUT, and inserts the data of the designated line into the transmission line H-LOOP under the control of the node stage learning control unit N8C. Also, transmission line H-LOOP.

上のデータを分岐して指定された回線へ接続するための
制御を行なう。すなわちノードステージ冒ン制御部Ｎ８
Ｃは、伝送路Ｈ−ＬＯＯＰを介してノードステージ冒ン
関通信を行なうことにより分散交換機能を有する。Performs control to branch the above data and connect it to the specified line. In other words, the node stage access control unit N8
C has a distributed switching function by performing node stage interrelated communication via the transmission path H-LOOP.

ところが、このようなループ形のローカルエリアネット
ワーク方式では、ノードステージ璽ンＮ８の近辺にある
端末はそのノードステージ璽ンＮ８にに％収容できるが
、ある程度の距−がある場合には電気的特性を犠牲にし
て端末との間を長−ケーブルでＷ！続するか、または高
価なノードステージ曹ンＮ８を設置しなければならなか
つ九。However, in such a loop-type local area network system, terminals located near the node stage N8 can be accommodated in the node stage N8, but if there is a certain distance, the electrical characteristics may change. A long cable between the terminal and the terminal at the expense of W! 9, or an expensive node stage N8 must be installed.

（３）発明の目的 本発明はループ形システムのノードステージーン内に簡
単な回路を付加すると共に、簡単なりモートステージ冒
ンと安価な低速ループ状伝送路を設けることによル分散
され九端末の収容をノードステージ冒ンにより収容する
場合よりさらに効率的に極め細かく行なう仁とを可能と
したローカルエリアネットワーク方式を提供することに
ある。(3) Purpose of the Invention The present invention adds a simple circuit to the node stage of a loop-type system, and also provides a simple mote stage and an inexpensive low-speed loop-shaped transmission line. An object of the present invention is to provide a local area network system that enables more efficient and finely accommodating information than when accommodating information by accessing node stages.

（４）発明の構成 本発明のローカルエリアネットワーク方式は、制御機能
をもつ複数のノードステージ■ンと該ノードステージｌ
ン関をループ状の高速ループ状伝送路で結ぶローカルエ
リアネットワークにおいて、該ノードステージ冒ンの少
なくとも１つに低速ループ状伝送路を収容すると共に、
該低速ループ状伝送路に対し集−機能をもつ複数のリモ
ートステージ冒ンを設け、端末をノードステージ冒ン、
リモートステージ冒ンｔｌｃ分散して収容したことを特
徴とする。(4) Structure of the Invention The local area network system of the present invention comprises a plurality of node stages having a control function and the node stage l.
In a local area network that connects nodes with a high-speed loop-shaped transmission line, at least one of the node stages accommodates a low-speed loop-shaped transmission line, and
A plurality of remote stages with aggregation functions are provided for the low-speed loop-shaped transmission path, and the terminals are connected to the node stages.
It is characterized by distributing and accommodating remote stage access TLC.

（５）発明の実施例 次に図面を参照して本発明の実施例について説明する。(5) Examples of the invention Next, embodiments of the present invention will be described with reference to the drawings.

第２図は本発明の一実施例を示すブロック図である。第
２図においてノードステージｍ＋７Ｎ８の第１図と同一
の機能プ四ツクと、高速ループ状伝送路Ｈ−ＬＯＯＰの
動作は第１図に示す動作と同様である。第２図において
はノードステージ璽ンＮ８・の近辺にある端末はノード
ステージ冒ンＮ８・に直接収容するが、ノードステージ
曹ンＮ８・からめる程度の距−がある場合には端末Ｔと
の距離を伸ばすか、または高価なノードステージ璽ンＮ
８を置くことになる。そこでノードステージ曹ンＮＳ・
にり七−トステージ冒ン制御部Ｎ８ＲＣを設けると共に
、低速ループ状伝送Ｗ、Ｌ−ＬＯＯＰと集線機能をもつ
リモートステージ璽ンＲ８を設置、ノードステージ璽ン
Ｎ８−から離れた端末をリモートステージ曹ンＲ８に収
容することによシ総合的に経済的なシステムを提供でき
る仁とになる。FIG. 2 is a block diagram showing one embodiment of the present invention. In FIG. 2, the same functional blocks as in FIG. 1 of the node stage m+7N8 and the operation of the high speed loop transmission line H-LOOP are the same as those shown in FIG. In Fig. 2, terminals near the node stage N8 are directly accommodated in the node stage N8, but if there is a distance to the extent that they can be entwined with the node stage N8, the distance from the terminal T is Stretch or expensive node stage
I will put 8. So the node stage NS.
In addition to installing a stage control unit N8RC, a remote stage R8 with low-speed loop transmission W, L-LOOP and line concentration functions is installed, and a terminal far from the node stage N8- is connected to the remote stage. By accommodating it in the Soun R8, it becomes possible to provide a comprehensively economical system.

第２図においてリモートステージ冒ン制御部Ｎ８ＲＣは
、ノードステージ璽ン制御部ＮＳＣと同様端末を交換接
続するための発呼終話検出機能、信号送受信機能等端末
の信号処理を行うと共に、ノードステージ璽ンＮ８間の
通信機能をもつものでマイクロプロセッサから成る制御
装置である。低速ループ状伝送路Ｌ−ＬＯＯＰは高速ル
ープ状伝送路Ｈ−ＬＯＯＰが例えば３２ＭｂＡ、。In FIG. 2, the remote stage connection control unit N8RC performs terminal signal processing such as call termination detection function and signal transmission/reception function for connecting terminals in an exchange manner, as well as the node stage connection control unit NSC. It is a control device consisting of a microprocessor and has a communication function between the cables N8 and N8. For example, the low speed loop transmission line L-LOOP is 32 MbA, and the high speed loop transmission line H-LOOP is 32 MbA.

等の速度に対し１、ｓ４４Ｍｂ、４ま九は２．０４８Ｍ
ｂ／。For the speed of 1, s44Mb, 4M is 2.048M
b/.

の速度で一般に使用される１チヤネル６４ＫｂイのＰＣ
Ｍ２４または３２チヤネルの伝送路である。A single channel 64Kb PC commonly used at speeds of
This is an M24 or 32 channel transmission line.

すなわち信号送受信回路ＣＤ／ＣＲはバイポー２信号の
送受信回路でクロックの抽出機能等も含む一般的な伝送
路である。リモートステージ璽ンＲ８においては回線終
端回路ＬＵＴ経由の端末データはリモートステージ冒ン
制御部几ＳＣで端末速度に対応する速度でサンプリング
してＰＣＭチャネルにのせる。端末の信号はＰＣＭチャ
ネルの一部をアウトチャネルとして使用して送出する。That is, the signal transmitting/receiving circuit CD/CR is a bipolar 2 signal transmitting/receiving circuit, and is a general transmission line that also includes a clock extraction function and the like. In the remote stage R8, the terminal data via the line termination circuit LUT is sampled by the remote stage control unit SC at a rate corresponding to the terminal speed and is placed on the PCM channel. Terminal signals are transmitted using part of the PCM channel as an out channel.

リモートステージ璽ンＲ８においては収容する回線は１
〜８回線と少ないのでリモートステージ冒ン制御部Ｒ８
Ｃを含むリモートステージ冒ンＲ８は十分安価で小型化
されたものである。The remote stage R8 accommodates 1 line.
~Since there are only 8 lines, remote stage access control section R8
The remote stage engine R8 including C is sufficiently inexpensive and compact.

（６）　　発明の効果 本発明は以上説明したように、高速ループに対しさらに
低速ループを設ける仁とにより各所に分散配置された端
末の通信を行なうローカルエリアネットワークシステム
を効率的に構築することができる。(6) Effects of the Invention As explained above, the present invention makes it possible to efficiently construct a local area network system for communicating between terminals distributed in various locations by providing a low-speed loop in addition to a high-speed loop. can.

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

第１図は従来のローカルエリアネットワークのループ系
を示すブロック図、第２図は本発明の一実施例を示すブ
ロック図である。 Ｈ−ＬＯＯＰ・・・・・・高速ループ状伝送路、Ｎ８ａ
−ｎ・・・・・・ノードステージ冒ン、Ｏ／Ｂ　　Ｃ０
ＮＶ・・・・・・［光→電気Ｊ変換部、ＮＳＣ・・・・
・・ノードステージ冒ン制御部、ＬＵＴ・・・・・・回
線終端回路、Ｔ・・・・・・端末、Ｎ５ＲＣ・・・・・
ツードステーシ冒ンリモート制御ｉ１１部、ＣＤ／ＣＲ
・・・・・・信号送受信回路、Ｌ−ＬＯＯＰ・・・・・
・低速ループ状伝送路、Ｒ８＃？〜ｎ・・・・・・リモ
ートステージｌン、Ｒ８Ｃ・・・・・・リモートステー
ジ冒ン制御部代理人　弁理士内　原　　　糺ｈ・FIG. 1 is a block diagram showing a loop system of a conventional local area network, and FIG. 2 is a block diagram showing an embodiment of the present invention. H-LOOP・・・High-speed loop transmission line, N8a
-n...Node stage attack, O/B C0
NV・・・・・・[Optical → Electrical J converter, NSC・・・・
...Node stage access control unit, LUT...Line termination circuit, T...Terminal, N5RC...
Tsudo station remote control i11 part, CD/CR
...Signal transmitting and receiving circuit, L-LOOP...
・Low speed loop transmission line, R8#? ～n...Remote stage, R8C...Remote stage operation control department agent Tadasu Hara, patent attorney

Claims (1)

【特許請求の範囲】[Claims] 制御機能をもつ複数のノード　ステージ嘗ンと蚊ノード
ステージ嘗ン関をループ状の高速ループ状伝送路で結ぶ
一一カルエリアネットワークにおいて、該ノードステー
ジ冒ンの少なくとも１つに低速ループ状伝送路を収容す
ると共に、誼低速ループ状伝送路に対し集線機能をもつ
複数のりモートステージ曹ンを設け、端末をノードステ
ージ冒ン、リモートステージ冒ンに分散して収容し九こ
とを特徴とするローカルエリアネットワーク方式。In a local area network that connects a plurality of nodes with control functions and a mosquito node stage via a high-speed loop-shaped transmission line, at least one of the node stages has a low-speed loop-shaped transmission line. In addition to accommodating the low-speed loop-shaped transmission line, a plurality of remote stage stations having a concentrating function are provided, and the terminals are distributed and accommodated in the node stage and remote stage. Area network method.
JP1613082A 1982-02-03 1982-02-03 Local area network system Pending JPS58133067A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1613082A JPS58133067A (en) 1982-02-03 1982-02-03 Local area network system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1613082A JPS58133067A (en) 1982-02-03 1982-02-03 Local area network system

Publications (1)

Publication Number Publication Date
JPS58133067A true JPS58133067A (en) 1983-08-08

Family

ID=11907906

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1613082A Pending JPS58133067A (en) 1982-02-03 1982-02-03 Local area network system

Country Status (1)

Country Link
JP (1) JPS58133067A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10819217B2 (en) 2017-03-03 2020-10-27 Mitsubishi Electric Corporation Power conversion device and communication method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10819217B2 (en) 2017-03-03 2020-10-27 Mitsubishi Electric Corporation Power conversion device and communication method

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