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JPS58206257A - Loop multiplex transmitting system - Google Patents

Loop multiplex transmitting system

Info

Publication number
JPS58206257A
JPS58206257A JP57090105A JP9010582A JPS58206257A JP S58206257 A JPS58206257 A JP S58206257A JP 57090105 A JP57090105 A JP 57090105A JP 9010582 A JP9010582 A JP 9010582A JP S58206257 A JPS58206257 A JP S58206257A
Authority
JP
Japan
Prior art keywords
loop
transmission
terminal
terminal stations
backward
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
JP57090105A
Other languages
Japanese (ja)
Inventor
Seiichiro Shigaki
志垣 清一郎
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 JP57090105A priority Critical patent/JPS58206257A/en
Publication of JPS58206257A publication Critical patent/JPS58206257A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42Loop networks
    • H04L12/437Ring fault isolation or reconfiguration

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To transmit the communication of >=1 pair for each set, by providing two pairs of transmission lines to transmit the digital signal to both forward and backward directions and having a connection with priority to the transmission line having a smaller number of terminal offices which are connected in a range from a transmitting terminal office through a receiving terminal office. CONSTITUTION:The communications of 3 pairs are transmitted among terminal offices A-B, C-D and E-F via two loop transmission lines with features that a loop R1 goes backward and rise and fall signals are always transmitted through a backward loop between terminal offices. In such a case, the communications of 1.5 pairs are transmitted for each loop. If the station E exists between stations C and D, the transmission is impossible between either one of E-F and C-D. However, an N-multiplexed digital signal transmission line is used in place of N pieces of loop transmission lines in a loop transmission system, and >=10 systems are usually used for both the value of N and the number of terminal offices. Then an idle loop is looked for, and the rise and fall signals are connected in a backward loop and between the side close to the loops at all times. Thus the effective transmission is ensured on an average.

Description

【発明の詳細な説明】 本発明はループ伝送路、特に二組のループ伝送齋を使用
して効率よく信号を伝送するループ多重伝送方式に関す
るものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loop multiplex transmission system for efficiently transmitting signals using a loop transmission line, particularly two sets of loop transmission lines.

ループ伝送路は一つのループに同一の方向の信号を伝送
し゛Cループに接続された端局間の通信を付うため、1
組のループ伝送路にっき1ペアの通イ8を伝送するもの
である(参考文献、堀井他「光フアイバ通信によるデー
タハイウェイシステム」1子通16学会研究報告5E7
9−120)。かがる従来のループ伝送方式は、ループ
に接続された端局の間の信号の伝送方向が片方向に限ら
れるため、信号を伝送する二端局間の距離がループ伝送
路の長さに比べて短い場合でも、片方向の信号はループ
送伝路を大蜘すし、−組のループ伝送路当り、−ペアの
信号のみしか伝送できない欠点があった。
The loop transmission line transmits signals in the same direction in one loop and provides communication between terminal stations connected to the C loop.
(References: Horii et al., "Data Highway System Using Optical Fiber Communication," 16th Academic Conference Research Report 5E7
9-120). In the conventional loop transmission method, the signal transmission direction between the terminal stations connected to the loop is limited to one direction, so the distance between the two terminal stations transmitting the signal is equal to the length of the loop transmission path. Even if the signal is relatively short, a signal in one direction requires a large loop transmission path, and there is a drawback that only one pair of signals can be transmitted per one pair of loop transmission paths.

本発明の目的はそれぞれ逆廻りの2組のループ伝送路を
使って1組当り1ペア以上の通信を伝送できるループ多
重伝送方式を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a loop multiplex transmission system capable of transmitting communications of one or more pairs per pair using two sets of loop transmission lines in opposite directions.

本発明のループ多重伝送方式は複数の端局と、この端局
間をループ状に接続して時分割多l化ティジタル信号を
一方向に伝送する第1の伝送路と、該第1の伝送路に並
行して前記端局間をループ状に接続し前記時分割多重化
ディジタル信号を逆方向に伝送する第2の伝送路とを有
し、前記端間の一つが、自局から送られる前記ディジタ
ル信号を受信すべき前記端局の他の一つまでの間に接続
さ本 れるi11記端局の数の少い側のhij記第1または第
2の伝送路に優先酢に接続する手段を有することを%徴
とする。
The loop multiplex transmission system of the present invention includes a plurality of terminal stations, a first transmission path that connects the terminal stations in a loop and transmits time-division multiplexed digital signals in one direction, and the first transmission line. and a second transmission line that connects the terminal stations in a loop in parallel with the terminal station and transmits the time division multiplexed digital signal in the opposite direction, and one of the terminal stations is sent from the own station. (11) Prioritize connection to the first or second transmission line of the side with the smaller number of terminal stations connected between the other one of the terminal stations that should receive the digital signal. Having the means is a % mark.

以下、図面に従って説明する。第1図は従来の1ループ
当り1ベアの通信方式にとりFLQ、R1の2組の伝送
路でAB端局間CD端局 間の2ベアの信号を伝送する場合のブロック図である。
The explanation will be given below according to the drawings. FIG. 1 is a block diagram of a conventional one-bear-per-loop communication system in which two-bear signals are transmitted between AB terminal stations and CD terminal stations using two sets of transmission lines, FLQ and R1.

第2図は本発明の実施例で、2ループの伝送路でA−+
b 、C−>D 、E←→F端局間の3ベアの通信を伝
送する場合のブロック図で、この場合lループ当り1.
5ベアの通信を伝送していることになる。
Figure 2 shows an embodiment of the present invention, in which A-+
b, C->D, E←→F is a block diagram for transmitting 3-bear communication between terminal stations, in which case 1.
This means that 5 bear communications are being transmitted.

第1図と第2図の違いはループR1が逆蜘りであること
と、各端局間の、ヒリ、下りの信号か第1を伝わること
である。
The difference between FIG. 1 and FIG. 2 is that the loop R1 is a reverse loop, and that the downlink signal between each terminal station is transmitted through the first loop.

もちろん、E局がC局とD局の間に有れば第2し1の場
合でもE 、 F間筐たは019間のいずれかの通信は
伝送できなくなるものであるが、−剌にこのような通信
方式を適用するループ伝送システムではN個のループ伝
送路の代りに1本のへ多1化の時分側条1ディジタル信
号伝送路を使用り、、Nの値も、端局の数も数10以上
のシステムを構成するのか常であるから、空いているル
ープを探して、常にループの近い側聞で、上り下りの信
号を逆廻りのループで結ぶようにすれは、平均的には第
1図の方式より効率的となり特に近い端局間の通信振が
多い一般のシステムでそれに顕著である。
Of course, if E station is between C station and D station, even in the second to first case, communication between E and F boxes or between 019 and 019 cannot be transmitted. In a loop transmission system that applies a communication method such as this, one digital signal transmission line with multi-to-one digital signal transmission lines is used instead of N loop transmission lines, and the value of N also varies depending on the terminal station. Since the number of systems is usually 10 or more, searching for an empty loop and always connecting up and down signals with reverse loops on the side near the loop is a good idea. This is more efficient than the method shown in FIG. 1, especially in general systems where there is a lot of communication fluctuation between nearby terminal stations.

、本弁明によれば距離の短い通信に対して約端局数の1
/2倍だけ従来システムより効率が増加するという効果
が生じる(隣接局間に対しては従来方式が1ペア/ルー
プに対して本方式はN/2ペア/ループ(、NIr1端
局数)となる)。
, according to this defense, for short-distance communication, approximately 1 of the number of terminal stations
The effect is that the efficiency is increased by /2 times compared to the conventional system (for adjacent stations, the conventional method has 1 pair/loop, whereas the present method has N/2 pairs/loop (, NIr1 number of terminal stations)). Become).

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

第1図は従来のループ多重伝送方式を示すブロック図、
第2図は本発明のループ多重伝送方式の実施例を示すブ
ロック図である。 A、H,C,I)、j!;、F−・・−・端Thj k
 ft、Ro。 al・・・・・・伝送路。 代理人 弁理士  内 原   音
Figure 1 is a block diagram showing a conventional loop multiplex transmission system.
FIG. 2 is a block diagram showing an embodiment of the loop multiplex transmission system of the present invention. A, H, C, I), j! ;, F-... end Thj k
ft. Ro. al...Transmission line. Agent Patent Attorney Oto Uchihara

Claims (1)

【特許請求の範囲】 複数の端局と、この端局間をループ状に!&続して時分
割多重化ディジタル信号を一方向に伝送する第1の伝送
路と、該第1の伝送路に並行して前記端局間をループ状
に接続し^り記時分割多皇化ティジタル信号を逆方向に
伝送する第2の伝送路とを有し、前記端局の一つが、自
局から送られる前記ディジタル信号を受信すべき前記m
Uの他の−ぷ りまでの間に接続される前記端局の数の少い仙:の前記
第1または第2の伝送路に優先的に接続する手段を有す
ることを%徴とするループ多重伝送方式。
[Claims] Multiple terminal stations and a loop between these terminal stations! &Subsequently, a first transmission path for transmitting time-division multiplexed digital signals in one direction and the terminal stations are connected in a loop in parallel with the first transmission path. and a second transmission path for transmitting digital signals in the opposite direction, one of the terminal stations receiving the digital signal sent from the own station.
Loop multiplexing characterized by having means for preferentially connecting to the first or second transmission path of a small number of terminal stations connected between other terminals of U. Transmission method.
JP57090105A 1982-05-27 1982-05-27 Loop multiplex transmitting system Pending JPS58206257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57090105A JPS58206257A (en) 1982-05-27 1982-05-27 Loop multiplex transmitting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57090105A JPS58206257A (en) 1982-05-27 1982-05-27 Loop multiplex transmitting system

Publications (1)

Publication Number Publication Date
JPS58206257A true JPS58206257A (en) 1983-12-01

Family

ID=13989234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57090105A Pending JPS58206257A (en) 1982-05-27 1982-05-27 Loop multiplex transmitting system

Country Status (1)

Country Link
JP (1) JPS58206257A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61127247A (en) * 1984-11-26 1986-06-14 Nec Corp Transmission line changeover system of communication system
JPS62189841A (en) * 1986-02-17 1987-08-19 Nec Corp Communication system in line multiplex loop network
JPS6420753A (en) * 1987-07-16 1989-01-24 Agency Ind Science Techn Ring bus communication system
WO2005027423A1 (en) * 2003-09-12 2005-03-24 Matsushita Electric Industrial Co., Ltd. Radio communication method, radio communication terminal accommodating apparatus, and radio communication terminal
US7006523B2 (en) 1998-07-28 2006-02-28 Serconet Ltd. Local area network of serial intelligent cells
JP2008160869A (en) * 2008-01-17 2008-07-10 Matsushita Electric Ind Co Ltd Wireless communication method, wireless communication terminal accommodating apparatus, and wireless communication terminal
US8363797B2 (en) 2000-03-20 2013-01-29 Mosaid Technologies Incorporated Telephone outlet for implementing a local area network over telephone lines and a local area network using such outlets

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54148343A (en) * 1978-05-12 1979-11-20 Nec Corp Data transfer control unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54148343A (en) * 1978-05-12 1979-11-20 Nec Corp Data transfer control unit

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61127247A (en) * 1984-11-26 1986-06-14 Nec Corp Transmission line changeover system of communication system
JPS62189841A (en) * 1986-02-17 1987-08-19 Nec Corp Communication system in line multiplex loop network
JPS6420753A (en) * 1987-07-16 1989-01-24 Agency Ind Science Techn Ring bus communication system
US7424031B2 (en) 1998-07-28 2008-09-09 Serconet, Ltd. Local area network of serial intelligent cells
US7965735B2 (en) 1998-07-28 2011-06-21 Mosaid Technologies Incorporated Local area network of serial intelligent cells
US7016368B2 (en) 1998-07-28 2006-03-21 Serconet, Ltd. Local area network of serial intelligent cells
US7035280B2 (en) 1998-07-28 2006-04-25 Serconet Ltd. Local area network of serial intelligent cells
US7095756B2 (en) 1998-07-28 2006-08-22 Serconet, Ltd. Local area network of serial intelligent cells
US7187695B2 (en) 1998-07-28 2007-03-06 Serconet Ltd. Local area network of serial intelligent cells
US7221679B2 (en) 1998-07-28 2007-05-22 Serconet Ltd. Local area network of serial intelligent cells
US7292600B2 (en) 1998-07-28 2007-11-06 Serconet Ltd. Local area network of serial intellegent cells
US8908673B2 (en) 1998-07-28 2014-12-09 Conversant Intellectual Property Management Incorporated Local area network of serial intelligent cells
US8885659B2 (en) 1998-07-28 2014-11-11 Conversant Intellectual Property Management Incorporated Local area network of serial intelligent cells
US7830858B2 (en) 1998-07-28 2010-11-09 Mosaid Technologies Incorporated Local area network of serial intelligent cells
US7006523B2 (en) 1998-07-28 2006-02-28 Serconet Ltd. Local area network of serial intelligent cells
US7986708B2 (en) 1998-07-28 2011-07-26 Mosaid Technologies Incorporated Local area network of serial intelligent cells
US8885660B2 (en) 1998-07-28 2014-11-11 Conversant Intellectual Property Management Incorporated Local area network of serial intelligent cells
US8325636B2 (en) 1998-07-28 2012-12-04 Mosaid Technologies Incorporated Local area network of serial intelligent cells
US8867523B2 (en) 1998-07-28 2014-10-21 Conversant Intellectual Property Management Incorporated Local area network of serial intelligent cells
US8855277B2 (en) 2000-03-20 2014-10-07 Conversant Intellectual Property Managment Incorporated Telephone outlet for implementing a local area network over telephone lines and a local area network using such outlets
US8363797B2 (en) 2000-03-20 2013-01-29 Mosaid Technologies Incorporated Telephone outlet for implementing a local area network over telephone lines and a local area network using such outlets
US8023476B2 (en) 2003-09-12 2011-09-20 Panasonic Corporation Radio communication method, radio communication terminal accommodating apparatus, and radio communication terminal
WO2005027423A1 (en) * 2003-09-12 2005-03-24 Matsushita Electric Industrial Co., Ltd. Radio communication method, radio communication terminal accommodating apparatus, and radio communication terminal
JP2008160869A (en) * 2008-01-17 2008-07-10 Matsushita Electric Ind Co Ltd Wireless communication method, wireless communication terminal accommodating apparatus, and wireless communication terminal

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