JPS633494B2 - - Google Patents
Info
- Publication number
- JPS633494B2 JPS633494B2 JP14619178A JP14619178A JPS633494B2 JP S633494 B2 JPS633494 B2 JP S633494B2 JP 14619178 A JP14619178 A JP 14619178A JP 14619178 A JP14619178 A JP 14619178A JP S633494 B2 JPS633494 B2 JP S633494B2
- Authority
- JP
- Japan
- Prior art keywords
- station
- control station
- control
- stations
- dependent
- 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.)
- Expired
Links
- 230000001419 dependent effect Effects 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 6
- 238000012790 confirmation Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 2
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
Description
【発明の詳細な説明】
本発明はデータを相互に伝送し合う複数の局間
を共用する伝送路によつて接続したデータ伝送シ
ステムにおけるポーリング制御方式に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polling control system in a data transmission system in which a plurality of stations that mutually transmit data are connected by a shared transmission path.
従来この種のデータ伝送システムは第１図に示
す様に構成されている。図中１は制御局を、２は
予備制御局を、３―１，３―２，…３−ｍ＋ｎは
従属局を示す。今、図に示すシステムにおいて、
従属局３−２〜３−ｍ及び３−ｍ＋２〜３ｍ＋ｎ
から従属局３−１又は３−ｍ＋１へデータを伝送
する必要がある場合には、制御局１のポーリング
制御に従い従属局３―２〜３−ｍ及び３−ｍ＋２
〜３−ｍ＋ｎのデータを伝送路４を介して一度制
御局１へ伝送した後、セレクテイングデータによ
り従属局３−１又は３−ｍ＋１へ伝送することと
なる。また、信頼度を高める為に制御局１の障害
バツクアツプ用の制御局２を設置している。 Conventionally, this type of data transmission system has been constructed as shown in FIG. In the figure, 1 represents a control station, 2 represents a backup control station, and 3-1, 3-2, . . . 3-m+n represent dependent stations. Now, in the system shown in the figure,
Dependent stations 3-2 to 3-m and 3-m+2 to 3m+n
When it is necessary to transmit data from to dependent station 3-1 or 3-m+1, dependent stations 3-2 to 3-m and 3-m+2 follow the polling control of control station 1.
After the data of ~3-m+n is once transmitted to the control station 1 via the transmission line 4, it is transmitted to the dependent station 3-1 or 3-m+1 according to the selecting data. In addition, in order to increase reliability, a control station 2 is installed to back up failures of the control station 1.
このような従来方式においては従属局間でデー
タ伝送を行なう場合、制御局を経由して行なわな
ければならず、伝送時間が遅くなるという欠点、
制御局障害時データ伝送が全くできなくなるとい
う欠点、並びに制御局障害時のバツクアツプ用に
予備の制御局を設置しなければならないこと及び
制御局用と従属局用の２種類の装置を必要とする
というコスト上、保守上の欠点があつた。 In such conventional systems, when data is transmitted between dependent stations, it must be done via a control station, which slows down the transmission time.
Disadvantages: data transmission is not possible at all in the event of a control station failure; a backup control station must be installed for backup in the event of a control station failure; and two types of equipment are required: one for the control station and one for the subordinate stations. There were drawbacks in terms of cost and maintenance.
本発明はこれらの欠点を解決するため各局を制
御局又は従属局に固定しないで、全局に制御局と
従属局の両方の機能をもうけ、自らが制御局にな
ることを宣言する制御局宣言コマンドを送出した
任意の局へ制御局の機能を移動できるよう構成し
たもので、以下図面について詳細に説明する。 In order to solve these drawbacks, the present invention does not fix each station as a control station or a dependent station, but provides all stations with the functions of both a control station and a dependent station, and provides a control station declaration command that declares itself to be a control station. The control station is configured so that the functions of the control station can be transferred to any station that has transmitted the information, and the drawings will be explained in detail below.
第２図は本発明方式が適用されるデータ伝送シ
ステムの一実施例を示すブロツク図で、制御局と
従属局の両方の機能をそなえた局５−１〜ｎは共
用するループ状の伝送路４によつて接続されてい
る。また、第４図は制御局から従属局への切替動
作及び従属局から制御局への切替動作を示すタイ
ムチヤートである。電源投入時どの局も従属局で
あるが、自局が制御局になることを要求する制御
局要求信号がある場合、又は一定時間内に制御局
が従属局に対してデータを要求するポーリングコ
マンドPA，PB，PC…PZ等が他局から受信しな
い時、自局が制御局になることを他局に宣言する
制御局宣言コマンドを送出して制御局となる。第
４図のt0におけるＡ局がこれに相当し、Ａ局は制
御局要求信号があるので制御局宣言コマンドIA
を送出する。一方、他の局Ｂ，Ｃ〜ＺはIAの受
信によりＡ局が制御局になることを確認する応答
AB，AC〜AZを返送する。Ａ局はｔ１において
これらの符号を受信し制御局となる。以後ｔ２に
おいてＡ局の制御局要求信号がなくなつても他局
に制御局要求信号がなければＡ局は制御局となり
続けポーリングコマンドPAを繰返し送出する。 FIG. 2 is a block diagram showing an embodiment of a data transmission system to which the method of the present invention is applied. Stations 5-1 to 5-n, which have the functions of both a control station and a dependent station, share a loop-shaped transmission path. connected by 4. Further, FIG. 4 is a time chart showing the switching operation from the control station to the dependent station and the switching operation from the dependent station to the control station. When the power is turned on, any station is a dependent station, but if there is a control station request signal requesting that the own station become the control station, or a polling command in which the control station requests data from the dependent station within a certain period of time. When a PA, PB, PC...PZ, etc. does not receive information from other stations, it becomes a control station by sending out a control station declaration command to declare to other stations that it will become a control station. Station A at t0 in Figure 4 corresponds to this, and since station A has a control station request signal, the control station declaration command IA
Send out. On the other hand, other stations B, C to Z receive responses confirming that station A will become the control station upon receiving the IA.
Return AB, AC to AZ. Station A receives these codes at t1 and becomes a control station. Thereafter, even if the control station request signal from the A station disappears at t2, if there is no control station request signal from another station, the A station continues to be the control station and repeatedly sends out the polling command PA.
次にｔ３において従属局Ｃに制御局要求信号が
発生するとＣ局は制御局Ａからのポーリング・コ
マンドPAの応答DCの中にＣ局の制御局宣言コマ
ンドICを挿入する。ICを受信した制御局Ａはｔ
４において従属局に戻り、受信したIC及びAD〜
AZと共に自局の確認応答AAを送出する。一方
他の従属局においてはIAの場合と同様に確認符
号AB，AD〜AZを送出する。Ｃ局はこれらの符
号を受信したｔ５で制御局となる。 Next, at t3, when a control station request signal is generated in dependent station C, station C inserts the control station declaration command IC of station C into the response DC to the polling command PA from control station A. Control station A, which received the IC,
At step 4, return to the dependent station and receive the received IC and AD~
Sends own station's acknowledgment AA along with AZ. On the other hand, other dependent stations transmit confirmation codes AB, AD to AZ in the same way as in the case of IA. Station C becomes a control station at t5 when it receives these codes.
また、制御局要求信号が多数の局に同時にある
場合及び制御局要求信号がない状態で現制御局が
障害になつた場合には局間の制御局争奪を避ける
為各局に優先レベルを与え次の制御局を決定して
いる。尚、第４図中Ｅ及びｅは各メツセージの最
後を示すもので、各従属局におけるデータの送出
タイミングを決定している。 In addition, if the control station request signal is present in many stations at the same time, or if the current control station becomes a failure without the control station request signal, a priority level is given to each station to prevent control station contention between stations. The control station has been determined. Note that E and e in FIG. 4 indicate the end of each message, and determine the timing of data transmission in each dependent station.
第３図は第２図に示す本発明方式が適用された
データ伝送システムの一実施例を構成する為の局
構成である。６は本発明方式を制御するポーリン
グコントローラ、７は受信データRDをそのまま
送信側へ通過させるか又はポーリングコントロー
ラ６から生データSDを送出するかを選択する送
信切替回路、８はポーリングコントローラからの
送信切替制御信号、９は制御局要求信号である。 FIG. 3 shows a station configuration for constructing an embodiment of the data transmission system to which the method of the present invention shown in FIG. 2 is applied. 6 is a polling controller that controls the method of the present invention; 7 is a transmission switching circuit that selects whether to pass the received data RD to the transmitting side as it is or to send raw data SD from the polling controller 6; 8 is a transmission from the polling controller. The switching control signal 9 is a control station request signal.
送信切替回路７は正常時にはポーリングコント
ローラ６からのデータ又は受信データのどちらか
一方を選択して送出しているが、障害時には受信
データを全て送信側へ通過させる。 During normal operation, the transmission switching circuit 7 selects and transmits either the data from the polling controller 6 or the received data, but in the event of a failure, it passes all received data to the transmitting side.
第４図中大文字IA，AB，AC等で表わすもの
はポーリングコントローラ６から送出されるデー
タを示し、小文字ia，ab，ac等で表わすものは
従属局において送信切替回路７によつて受信側か
ら送信側へ通過するデータを示す。 Data indicated by uppercase letters IA, AB, AC, etc. in FIG. Shows the data passing to the sender.
このような構成にすることにより、共用する伝
送路によつて接続した複数の局をあらかじめ制御
局又は従属局に固定することなく、制御局要求信
号又は制御局の障害発生により任意を制御局と従
属局との関係を変えることができる。 By adopting such a configuration, multiple stations connected via a shared transmission path are not fixed as control stations or dependent stations in advance, and any station can become a control station due to a control station request signal or a failure in the control station. The relationship with dependent stations can be changed.
以上説明したように制御局と従属局を固定しな
い為、従属局間でデータを伝送する場合データを
受信する側の従属局を制御局に切替えることによ
つて伝送時間が速くなるという利点と制御局を含
めた多数の局に障害が発生しても残つた正常局間
でデータ伝送できるという利点及び予備の制御
局、制御局用と従属局用の２種類の装置を設置し
なくてもよいというコスト上、保守上の利点があ
る。 As explained above, since the control station and dependent stations are not fixed, when transmitting data between dependent stations, switching the dependent station receiving data to the control station has the advantage of speeding up the transmission time and control. The advantage is that even if a failure occurs in a large number of stations including one station, data can be transmitted between the remaining normal stations, and there is no need to install a backup control station or two types of equipment, one for the control station and one for the dependent stations. This has advantages in terms of cost and maintenance.
第１図は従来のポーリング制御方式によるデー
タ伝送システムのブロツク図、第２図は本発明の
データ伝送システムの一実施例を示すブロツク
図、第３図は第２図のシステムを構成するための
局構成の一実施例、第４図はポーリング制御方式
の概念を説明するタイムチヤートである。
１…制御局、２…予備の制御局、３―１〜ｍ＋
ｎ…従属局、４…共用する伝送路、５―１〜ｎ…
制御局と従属局の両方の機能をもうけた局、６…
ポーリングコントローラ、７…送信切替回路、８
…送信切替制御信号、９…制御局要求信号。
Fig. 1 is a block diagram of a data transmission system using a conventional polling control method, Fig. 2 is a block diagram showing an embodiment of the data transmission system of the present invention, and Fig. 3 is a block diagram showing an embodiment of the data transmission system of the present invention. FIG. 4, which shows an example of the station configuration, is a time chart explaining the concept of the polling control system. 1...Control station, 2...Backup control station, 3-1~m+
n...Subordinate station, 4...Shared transmission line, 5-1 to n...
A station that has the functions of both a control station and a dependent station, 6...
Polling controller, 7... Transmission switching circuit, 8
...Transmission switching control signal, 9...Control station request signal.
Claims (1)
するループ状の伝送路によつて接続したデータ伝
送システムのポーリング制御方式において、前記
複数の局の各々は制御局と従属局の両方の機能を
有し、且つ、自局が制御局になることを要求する
場合、又は、他局からのポーリングコマンドを受
信してから所定の時間内に再び他局からのポーリ
ングコマンドを受信しない場合、自局が制御局に
なることを宣言する制御局宣言コマンドを他局に
送出する手段と、前記制御局宣言コマンドを受信
することにより従属局を構成するとともに従属局
確認信号を送出する手段と、前記制御局宣言コマ
ンドを送出の後他のすべての局から送出された従
属確認信号を受信することにより制御局を構成す
る手段とを有するとともに予め与えられた各局の
優先レベルにより必要に応じて任意に制御局と従
属局との関係を設定することを特徴とするポーリ
ング制御方式。1. In a polling control method for a data transmission system in which multiple stations that mutually transmit data are connected by a shared loop transmission path, each of the multiple stations functions as both a control station and a dependent station. and if the own station requests to become a control station, or if the own station does not receive a polling command from another station within a predetermined period of time after receiving a polling command from another station, the own station means for sending a control station declaration command to other stations to declare that the station will become a control station; means for configuring a dependent station by receiving the control station declaration command and sending out a dependent station confirmation signal; It has means for configuring a control station by sending a control station declaration command and then receiving subordinate confirmation signals sent from all other stations, and also has means for configuring a control station by receiving subordinate confirmation signals sent from all other stations, and arbitrarily configures the control station as necessary according to the priority level given to each station in advance. A polling control method characterized by setting a relationship between a control station and dependent stations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14619178A JPS5573158A (en) | 1978-11-27 | 1978-11-27 | Polling control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14619178A JPS5573158A (en) | 1978-11-27 | 1978-11-27 | Polling control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5573158A JPS5573158A (en) | 1980-06-02 |
| JPS633494B2 true JPS633494B2 (en) | 1988-01-25 |
Family
ID=15402184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14619178A Granted JPS5573158A (en) | 1978-11-27 | 1978-11-27 | Polling control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5573158A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11355867A (en) * | 1998-02-24 | 1999-12-24 | Nec Corp | Communication system and its transmitter |
| US9225215B2 (en) | 2012-07-31 | 2015-12-29 | Denso Corporation | Rotating electric machine |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2540694B1 (en) * | 1983-02-07 | 1988-05-13 | Trt Telecom Radio Electr | TIME MULTIPLEX LOOP TELECOMMUNICATION SYSTEM COMPRISING FIRST AND SECOND TRANSMISSION LINES |
| JPH01228348A (en) * | 1988-03-09 | 1989-09-12 | Railway Technical Res Inst | Method for constituting optical dual system lan with high reliability |
| JP5012382B2 (en) * | 2007-10-03 | 2012-08-29 | ヤマハ株式会社 | Acoustic signal processing apparatus and network system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52115105A (en) * | 1976-03-24 | 1977-09-27 | Hitachi Ltd | Control station carrying-about system |
| JPS5372403A (en) * | 1976-12-10 | 1978-06-27 | Hitachi Ltd | Loop communication system |
| JPS53114630A (en) * | 1977-03-17 | 1978-10-06 | Toshiba Corp | Data highway system |
-
1978
- 1978-11-27 JP JP14619178A patent/JPS5573158A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11355867A (en) * | 1998-02-24 | 1999-12-24 | Nec Corp | Communication system and its transmitter |
| US9225215B2 (en) | 2012-07-31 | 2015-12-29 | Denso Corporation | Rotating electric machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5573158A (en) | 1980-06-02 |
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