JPS60254850A - Transmission system of ring network - Google Patents

Transmission system of ring network

Info

Publication number
JPS60254850A
JPS60254850A JP59112065A JP11206584A JPS60254850A JP S60254850 A JPS60254850 A JP S60254850A JP 59112065 A JP59112065 A JP 59112065A JP 11206584 A JP11206584 A JP 11206584A JP S60254850 A JPS60254850 A JP S60254850A
Authority
JP
Japan
Prior art keywords
station
transmission
data
transmitting
transmission module
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
JP59112065A
Other languages
Japanese (ja)
Inventor
Yuji Ogawa
小川 裕士
Katsuhiko Oimura
老邑 克彦
Kazuaki Urasaki
浦崎 一明
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP59112065A priority Critical patent/JPS60254850A/en
Publication of JPS60254850A publication Critical patent/JPS60254850A/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

Abstract

PURPOSE:To prevent the whole system from being shut down by placing a time- division type transmission module in reception mode except in a transmission time all the time and sending back a confirmation answer at intervals of data transfer between stations. CONSTITUTION:If the transmission line 3 between a repeater station 20b and a receiving station 20c is broken at 24 or if the transmission module 21c of the receiving station 20c enters a shutdown state, the repeater station 20b waits for an answer for a specific time and judges that abnormality occurs between the repeater station 20b and receiving station 20c unless a received answer signal is returned. Then, the transmission module 21b is placed in transmission mode and down information is sent to a transmitting station 20a. The transmitting station 20a receives the information, which reaches the repeater station 20b through the transmission module 22a, so that a confirmation answer signal to the down information is sent out. Then, the transmission module 21a is placed in transmission mode and sent data is returned in the opposite direction.

Description

【発明の詳細な説明】 (イ)発明の分野 この発明は、各局がリング状に結合されるリングネット
ワークの伝送方式に関する。
DETAILED DESCRIPTION OF THE INVENTION (A) Field of the Invention The present invention relates to a transmission system for a ring network in which stations are connected in a ring.

(ロ)従来技術とその問題点 従来、リングネットワークは第3図に示すように、各局
10.10、・・・、10を一本の信号線1.1、・・
・、1で結び、一方向にデータを送信するのが基本であ
った。
(b) Prior art and its problems Conventionally, as shown in Fig. 3, in a ring network, each station 10.10, . . . , 10 is connected to one signal line 1.1, .
・The basic idea was to connect with 1 and send data in one direction.

しかしながら、この方式は、1箇所でも異常が発生する
と、全体のシステムダウンを招くという重大な欠点があ
った。
However, this method has a serious drawback in that if an abnormality occurs at even one location, the entire system will go down.

そこで、上記方式の欠点を解消した実用的なリングネッ
トワークとして、信号の流れが逆になるような二重ルー
プを設け、通常は一つのループを使用して伝送し、伝送
路のどこかで異常が発生すれば、他のループを使用し、
いわゆるループバンク機能により、システムとしての機
能を維持する方式を採用している。この方式の各局10
の内部構成を第4図に示している。各局10は、通常、
伝送路1よりのデータを、受信モジュール11で受信し
、自局で取り込むデータであるかどうかをデータ判別部
15で判別するとともに、送信モジュール12からデー
タを送出する。もし、送信モジュール12の先方で異常
が発生すれば、送信モジュール14を駆動し、伝送路2
より、逆方向に信号を送信するようになっている。
Therefore, as a practical ring network that eliminates the drawbacks of the above method, we have created a double loop in which the signal flow is reversed, and normally one loop is used for transmission, and if there is an error somewhere along the transmission path. occurs, use another loop and
A so-called loop bank function is used to maintain the functionality of the system. Each station 10 of this method
The internal configuration of the is shown in FIG. Each station 10 usually
Data from the transmission path 1 is received by a receiving module 11, and a data determining unit 15 determines whether the data is to be taken in by the local station, and the transmitting module 12 transmits the data. If an abnormality occurs on the other side of the transmitting module 12, the transmitting module 14 is driven and the transmission line 2
It now sends signals in the opposite direction.

この方式は、ループハック機能により、システム全体の
ダウンが避けられるという利点があるが、反面、システ
ムは二重のループを設けねばならず、そのため、システ
ムコストが大幅に上昇するという欠点がある。
This method has the advantage that the loop hack function prevents the entire system from going down, but on the other hand, it has the disadvantage that the system must have a double loop, which significantly increases the system cost.

(ハ)発明の目的 この発明の目的は、上記従来方式の欠点を解消し、一本
の信号線を使用して、安価なリングネットワークを構成
し、それでいて、伝送路の1部で異常が発生しても、全
体のシステムダウンには至らない信頼性の高い、リング
ネットワークの伝送方式を提供することである。
(c) Purpose of the Invention The purpose of the present invention is to eliminate the drawbacks of the above-mentioned conventional system, to construct an inexpensive ring network using a single signal line, and yet, when an abnormality occurs in a part of the transmission line. An object of the present invention is to provide a highly reliable ring network transmission system that does not cause the entire system to go down even when the system is in use.

(ニ)発明の構成と効果 上記目的を達成するために、この発明のリングネットワ
ークの伝送方式は、各局に、それぞれ隣接局との間で送
受を行う単線双方向伝送手段を備え、各局は自局が送信
局になると、送信モードで一方の方向にデータ類の送信
を行い、送信終了後に受信モードに戻り、受信局あるい
は中継局になると、隣接局より送信されてくるデータ類
を受信し、受信後に確認応答をその隣接局に返送し、送
信局及び中継局は前記確認応答有無を一定時間検出して
、隣接の受信局、中継局を含む伝送路の異常を判定し、
中継局は異常発生を送信局側に返送し、送信局は、前記
一方の方向とは逆の方向にデータ類を再送信するように
している。
(d) Structure and Effect of the Invention In order to achieve the above object, the ring network transmission system of the present invention is such that each station is equipped with a single-line bidirectional transmission means for transmitting and receiving data to and from adjacent stations, and each station has its own When a station becomes a transmitting station, it transmits data in one direction in transmitting mode, returns to receiving mode after transmission is completed, and when it becomes a receiving station or relay station, it receives data transmitted from neighboring stations. After receiving, the acknowledgment is returned to the adjacent station, and the transmitting station and the relay station detect the presence or absence of the acknowledgment for a certain period of time to determine an abnormality in the transmission path including the adjacent receiving station and the relay station,
The relay station returns the occurrence of an abnormality to the transmitting station, and the transmitting station retransmits the data in the opposite direction to the one direction.

この発明によれば、一本の信号線で伝送路が構成される
ので、安価にシステムを構成できる上、伝送中に、その
伝送方向に異常が、生じた場合には、逆方向の伝送路を
使用してデータ類を伝送するので、たとえ、一部に異常
が発生してもシステム全体のダウンには至らず、信頼性
の高い伝送を行うことができる。
According to this invention, since the transmission path is configured with a single signal line, the system can be constructed at low cost, and if an abnormality occurs in the transmission direction during transmission, the transmission path in the opposite direction can be Since the data is transmitted using , even if an abnormality occurs in one part, the entire system will not go down, and highly reliable transmission can be performed.

(ホ)実施例の説明 以下、実施例により、この発明をさらに詳細に説明する
(e) Description of Examples The present invention will be explained in more detail below with reference to Examples.

第1図はこの発明の1実施例を示すリングネットワーク
の概略ブロック図である。この実施例ネットワークは、
一本の信号線3で、各局20a、20b、20C1・・
・がリング状に結ばれている。
FIG. 1 is a schematic block diagram of a ring network showing one embodiment of the present invention. This example network is
With one signal line 3, each station 20a, 20b, 20C1...
・ are tied in a ring shape.

局20aは、時分割の単線双方向伝送モジュール(以下
伝送モジュールという)21a、22aと、データ判別
部23aを含んでおり、他の局20b、20C1・・・
も同様の構成となっている。
The station 20a includes time-division single-line bidirectional transmission modules (hereinafter referred to as transmission modules) 21a and 22a and a data discrimination section 23a, and is connected to other stations 20b, 20C1, . . .
has a similar configuration.

各局20a、20b、20C1・・・は、通當時、受信
モードになっており、隣接局から送信されるトークン及
びデータ(データ類)が入ってくるのを待っている状態
にあるが、自局より、送信する場合には、送出側の伝送
モジュールが送信モードとなる。そして送信が終了する
と、その伝送モジュールは再び受信モードとなり、送信
した隣接局よりのアンサ(確認応答)を待つ。
At the time, each station 20a, 20b, 20C1, etc. is in reception mode, waiting for tokens and data (data type) transmitted from neighboring stations; Therefore, when transmitting, the transmission module on the sending side is in the transmission mode. When the transmission is completed, the transmission module returns to the reception mode and waits for an answer (acknowledgment) from the adjacent station that sent the transmission.

送信データ類の受信を開始した中継局は、次の隣接局側
の伝送モジュールを送信モードとし、受信データ類を次
の局に転送する。中継局又は受信局は、受信が終了する
と、送信局側の伝送モジュールを送信モードとし、アン
サを返送する。
The relay station that has started receiving the transmitted data sets the transmission module of the next adjacent station to the transmission mode, and transfers the received data to the next station. When the relay station or the receiving station completes reception, it sets the transmission module on the transmitting station side to a transmission mode and returns an answer.

アンサを受けた送信局あるいは中継局は次局までの伝送
路が正常であることを知ることができる。
The transmitting station or relay station that receives the answer can know that the transmission path to the next station is normal.

アンサの返送を待っていた中継局は、一定時間を経て、
アンサが返送されて来ない場合は、異常が発生したとし
て、送信局側にその旨をダウン情報として送信する。送
信局は、このダウン情報を受けると、当初とは逆の隣接
局に向けて、データ類を送信する。
After a certain period of time, the relay station that was waiting for the answer to be sent back will
If no answer is returned, it is assumed that an abnormality has occurred, and this fact is transmitted as down information to the transmitting station. When the transmitting station receives this down information, it transmits data to an adjacent station opposite to the original one.

次に、この実施例ネットワークの具体的な動作を説明′
する。−例として、局20aを送信局とし、中継局20
bを経て、受信局20cに伝送する場合を第2図に示す
信号タイムチャートを参照して説明する。
Next, we will explain the specific operation of this example network.
do. - As an example, the station 20a is the transmitting station, and the relay station 20a is the transmitting station.
The case where the signal is transmitted to the receiving station 20c via the signal line 20b will be explained with reference to the signal time chart shown in FIG.

先ず、送信局20aの伝送モジュール22aが送信モー
ドとなり、伝送モジュール22aから送信データDTの
送出が開始される。この送信データDTは伝送路3を介
して、中継局20bの伝送モジュール21bに、受信デ
ータDRとして受信され、さらに中継局20bは、この
データの受信で、伝送モジュール22bを送信モードと
し、受信したデータDRを、転送データDFとして、受
信局20cに送出する(第2図のt1参照)。中継局2
0bでは、伝送モジュール21bが、送信局20aから
のデータの受信を終了すると(第2図のt2参照)、伝
送モジュール21bが、すぐに送信モードとなり、デー
タ受信の確認のアンサ信号ASTIを、送信局20a側
に送信する。送信局20aの伝送モジュール22aは送
信終了で受信モードとなっているので、上記アンサ信号
ASTIを、受信アンサ信号ASR1として得る(第2
図のt3参照)。この受信アンサ信号ASR1により、
送信局20aは、中継局20bまでの伝送路3が正常で
あることを知る。
First, the transmission module 22a of the transmitting station 20a enters the transmission mode, and the transmission module 22a starts transmitting the transmission data DT. This transmission data DT is received by the transmission module 21b of the relay station 20b as reception data DR via the transmission path 3, and upon reception of this data, the relay station 20b sets the transmission module 22b to transmission mode and receives the data. Data DR is sent to receiving station 20c as transfer data DF (see t1 in FIG. 2). Relay station 2
At 0b, when the transmission module 21b finishes receiving data from the transmitting station 20a (see t2 in FIG. 2), the transmission module 21b immediately enters the transmission mode and transmits an answer signal ASTI confirming data reception. It is transmitted to the station 20a side. Since the transmission module 22a of the transmitting station 20a has finished transmitting and is in the receiving mode, it obtains the answer signal ASTI as the received answer signal ASR1 (second
(See t3 in the figure). With this received answer signal ASR1,
The transmitting station 20a knows that the transmission path 3 to the relay station 20b is normal.

また、中継局20bでは、伝送モジュール22bが、送
信局20aからのデータの転送を終了すると(第2図の
t2参照)、受信モードに切替わり、受信局20cから
のデータ受信アンサを待つことになる。
Furthermore, in the relay station 20b, when the transmission module 22b finishes transferring the data from the transmitting station 20a (see t2 in FIG. 2), it switches to the receiving mode and waits for a data reception answer from the receiving station 20c. Become.

ここで、もし、中継局20bと受信局20C間の伝送路
3の間で、線路断24が、発生していたとすると、ある
いは、受信局20cの伝送モジュール21c等がダウン
していると、受信アンサ信号ASR1’ が、中継局2
0bに戻ってこない。
Here, if a line breakage 24 occurs between the transmission line 3 between the relay station 20b and the receiving station 20C, or if the transmission module 21c etc. of the receiving station 20c is down, the reception Answer signal ASR1' is sent to relay station 2.
It doesn't return to 0b.

中継局20bは、一定時間をアンサ待ちしく第2図のt
4参照)、中継局20bと受信局20cの間で異常が発
生したと判断する。そして、伝送モジュール21bを送
信モードにして、ダウン情報DWTを、送信局20aに
送信する。送信局20aは、これをダうン情報DWRと
して受信する。
The relay station 20b waits for an answer for a certain period of time at t in FIG.
4), it is determined that an abnormality has occurred between the relay station 20b and the receiving station 20c. Then, the transmission module 21b is set to transmission mode and the down information DWT is transmitted to the transmission station 20a. The transmitting station 20a receives this as down information DWR.

そして、送信局20aの伝送モジュール22’aがら、
中継局20bに達し、ダウン情報の確認のアンサ信号A
ST2を送出しく第2図のt5参照)、今度は伝送モジ
ュール21aを送信モードとし、送信データDTを逆方
向に再送する(第2図のt6参照)。
Then, the transmission module 22'a of the transmitting station 20a,
The answer signal A reaches the relay station 20b and confirms the down information.
ST2 is sent out (see t5 in FIG. 2), the transmission module 21a is then set to the transmission mode, and the transmission data DT is retransmitted in the reverse direction (see t6 in FIG. 2).

上記のように、この実施例では、時分割型の伝送モジュ
ールを、送信時以外は、常に受信モードにしておき、ま
た局間のデータ転送毎に確認のアンサを返送するように
しているので、隣接局の動作状態がチェックでき、もし
一部で異常が発生してもすぐに、異常情報を送信局に送
れ、送信局は異常情報が送られてくれば、送信ルートを
逆にして伝送できるので、1箇所に異常が生しても、全
体のシステムダウンには至らない。
As mentioned above, in this embodiment, the time-division type transmission module is always in reception mode except when transmitting, and a confirmation answer is sent back every time data is transferred between stations. The operating status of neighboring stations can be checked, and if an abnormality occurs in one part, the abnormality information can be immediately sent to the transmitting station, and if the transmitting station receives abnormality information, it can reverse the transmission route and transmit. Therefore, even if an abnormality occurs in one location, the entire system will not go down.

なお、上記実施例では、双方向伝送モジュールとして、
時分割型のものを例に上げて説明したが、この発明は、
全二重型のものを用いてもよい。
In addition, in the above embodiment, as a bidirectional transmission module,
Although the explanation was given using a time-sharing type as an example, this invention
A full-duplex type may also be used.

また、上記実施例では、単純双方向伝送モジュール、伝
送経路は、電気式を想定して説明したが単純双方向光伝
送モジュール等を用いてもよいことはいうまでもない。
Further, in the above embodiments, the simple bidirectional transmission module and the transmission path are assumed to be electrical, but it goes without saying that a simple bidirectional optical transmission module or the like may be used.

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

第1図は、この発明の1実施例を示すリングネソトワ−
りの概略ブロック図、第2図は同リングネットワークの
動作を説明するための信号タイムチャート、第3図は従
来の基本的なリングネットワークを示す概略図、第4図
は従来の他のリングネットワークを構成する1局を示す
ブロック図である。 3:伝送路、20a、20b、20c:局、21a、2
1b、21c、22a、22b、22c:単残双方向伝
送モジュール、 23a、23b、23c:データ判別部、特許出願人 
立石電機株式会社 代理人 弁理士 中 村 茂 信 第3図 第4図 0
FIG. 1 shows a ringtone software showing one embodiment of the present invention.
Figure 2 is a signal time chart for explaining the operation of the ring network, Figure 3 is a schematic diagram showing a conventional basic ring network, and Figure 4 is a diagram of other conventional ring networks. It is a block diagram showing one station which constitutes. 3: Transmission line, 20a, 20b, 20c: Station, 21a, 2
1b, 21c, 22a, 22b, 22c: single residual bidirectional transmission module, 23a, 23b, 23c: data discrimination unit, patent applicant
Tateishi Electric Co., Ltd. Agent Patent Attorney Shigeru Nakamura Figure 3 Figure 4 0

Claims (1)

【特許請求の範囲】[Claims] (1)各局がリング状に結合されるリングネットワーク
において、 各局は、それぞれ隣接局との間で送受を行う単線双方向
伝送手段を備え、各局は自局が送信局になると、送信モ
ードで一方の方向にデータ類の送信を行い、送信終了後
に受信モードに戻り、受信局あるいは中継局になると、
隣接局より送信されて(るデータ類を受信し、受信後に
確認応答をその隣接局に返送し、送信局及び中継局は前
記確認応答有無を一定時間検出して、隣接の受信局、中
継局を含む伝送路の異常を判定し、中継局は異常発生を
送信局側に返送し、送信局は、前記一方の方向とは逆の
方向に、データ類を再送信するようにしたリングネット
ワークの伝送方式。
(1) In a ring network in which each station is connected in a ring, each station is equipped with a single-wire bidirectional transmission means for transmitting and receiving data between adjacent stations, and when each station becomes a transmitting station, it can switch to one side in transmission mode. It sends data in the direction of , returns to receive mode after transmission, and becomes a receiving station or relay station.
The data transmitted from the adjacent station is received, and after receiving it, an acknowledgment is sent back to the adjacent station, and the transmitting station and relay station detect the presence or absence of the acknowledgment for a certain period of time, and then transmit the data to the adjacent receiving station and relay station. The relay station determines whether there is an abnormality in the transmission path, including the abnormality, and the relay station returns the abnormality occurrence to the transmitting station, and the transmitting station retransmits the data in the opposite direction. Transmission method.
JP59112065A 1984-05-30 1984-05-30 Transmission system of ring network Pending JPS60254850A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59112065A JPS60254850A (en) 1984-05-30 1984-05-30 Transmission system of ring network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59112065A JPS60254850A (en) 1984-05-30 1984-05-30 Transmission system of ring network

Publications (1)

Publication Number Publication Date
JPS60254850A true JPS60254850A (en) 1985-12-16

Family

ID=14577170

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59112065A Pending JPS60254850A (en) 1984-05-30 1984-05-30 Transmission system of ring network

Country Status (1)

Country Link
JP (1) JPS60254850A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02172346A (en) * 1988-12-26 1990-07-03 Daido Signal Co Ltd Loop type parallel dual system transmission system
US7349329B2 (en) 2002-11-07 2008-03-25 Honda Motor Co., Ltd. Network system, data transmitter-receiver and failure location/compensation method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02172346A (en) * 1988-12-26 1990-07-03 Daido Signal Co Ltd Loop type parallel dual system transmission system
US7349329B2 (en) 2002-11-07 2008-03-25 Honda Motor Co., Ltd. Network system, data transmitter-receiver and failure location/compensation method

Similar Documents

Publication Publication Date Title
US4354267A (en) Data transmission system utilizing loop transmission lines between terminal units
US4959833A (en) Data transmission method and bus extender
US4058681A (en) Information transmission system
US4543574A (en) System for resolving collision in local network
EP0074672B1 (en) Asynchronous data bus system
JPH0638600B2 (en) Local area network system
JPH0344138A (en) Inter user's device communication network
EP0439646B1 (en) Optical star network protocol and system with minimised delay between consecutive packets
EP0026329B1 (en) Communications controller for a time division multiple access satellite communication network
JPS60254850A (en) Transmission system of ring network
JPS59131241A (en) Transmission system of carrier detection data
JP2669356B2 (en) PDS transmission system
JPH04124933A (en) Sequential multi-address data verifying system
SU1617668A1 (en) System for transmitting messages
JPS6322748B2 (en)
JPS60178766A (en) Terminal connection control system for facsimile store and exchange device
JPH01143539A (en) Station connection sequence confirming system for looped communication system
JPH0139259B2 (en)
JPS58173941A (en) Health check system of communication device
JPH01278131A (en) Demand assign communication device
JPH0145785B2 (en)
JPH0582100B2 (en)
JPH0583018B2 (en)
JPH02244831A (en) Radio communication system
JPH07110012B2 (en) Data transmission control method