JPS6380643A - Transmission control system for loop network - Google Patents

Transmission control system for loop network

Info

Publication number
JPS6380643A
JPS6380643A JP61225721A JP22572186A JPS6380643A JP S6380643 A JPS6380643 A JP S6380643A JP 61225721 A JP61225721 A JP 61225721A JP 22572186 A JP22572186 A JP 22572186A JP S6380643 A JPS6380643 A JP S6380643A
Authority
JP
Japan
Prior art keywords
data
loop network
node
transmitting
receiving
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
JP61225721A
Other languages
Japanese (ja)
Inventor
Naomi Taniguchi
谷口　尚己
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
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 filed Critical NEC Corp
Priority to JP61225721A priority Critical patent/JPS6380643A/en
Publication of JPS6380643A publication Critical patent/JPS6380643A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To efficiently transmit data by keeping on circulating data from a transmitting node on a loop network without receiving it according to the operation states of receiving nodes. CONSTITUTION:When a transmitting node 2 sends data to a receiving node 4' a discriminating circuit 3 sends the data on condition that no data is sent through the loop network 1. If the receiving node 4 is in the middle of processing last data and can not receive the new data, the new data from the transmitting node 2 is not received through the operation of a transmitting circuit 5. Consequently, the data from the transmitting node 2 is circulated on the loop network 1 continuously and respective transmitting nodes wait without sending data through decision circuits 3. The receiving node 4 finishes processing the last data and receives the new data, so there is no sent data on the loop network and the transmitting node 2 becomes possible to send next data.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、ループネットワークにおけるデータ通信方式
に関し、特に、送信ノードの送信を一時規制するループ
ネットワーク送信規制方式に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a data communication system in a loop network, and more particularly to a loop network transmission restriction system that temporarily restricts transmission from a transmitting node.

（従来技術） 従来、この種のループネットワークにおける複数のノー
ド間の通信【おいては、複数のノードからの単一のノー
ドに対してデー、夕が送信された場合、受信側のデータ
処理速度が送信速度に追いつかないことがあるため、受
信側に複数のバッファを備え、これによって受信データ
処理を一時留保していた。(Prior Art) Conventionally, in communication between multiple nodes in this type of loop network, when data is transmitted from multiple nodes to a single node, the data processing speed of the receiving side is Because the data may not be able to keep up with the transmission speed, multiple buffers are provided on the receiving side, which temporarily suspends processing of the received data.

（発明が解決しようとする問題点） 上述したように従来の方式では、受信側に複数のバッフ
ァを備えることにより、受信側の処理能力の不足に対処
していたので、ループ内のノードの数が増加すればそれ
だけバッファ等の複雑なハードウェアが大きくなるとい
う欠点があった。(Problems to be Solved by the Invention) As mentioned above, in the conventional system, the lack of processing capacity on the receiving side was dealt with by providing multiple buffers on the receiving side. The problem is that the larger the number of buffers, the more complicated hardware such as buffers will need to be.

（問題点を解決するための手段） 本発明の送信規制方式は、データを伝達するループネッ
トワークと、このループネットワークの状態によりデー
タの送信の可否を判断する機能を持つ複数の送信ノード
と、受信データの処理状態により送信ノードの動作を一
時的に禁止するべく受信データを取り込まずに再びルー
プネットワーク上に送信する手段を持つ受信ノードとを
有して構成されている。(Means for Solving the Problems) The transmission regulation system of the present invention includes a loop network that transmits data, a plurality of transmitting nodes that have a function of determining whether or not data can be transmitted based on the state of this loop network, and a receiving The receiving node has a means for temporarily prohibiting the operation of the sending node depending on the data processing state and transmitting the received data onto the loop network again without taking in the received data.

（実施例） 次に、本発明について図面を参照して実施例を説明する
。(Example) Next, an example of the present invention will be described with reference to the drawings.

第１図は本発明の１実施例に係るループネットワーク通
信システムのブロック図であり、１はループネットワー
ク、２Ｆｉ送信ノード、３は送信の可否を判断する判別
回路、４は受信ノード、５は受信データを再送する送信
回路である。この実施例において、送信ノード２で受信
ノード４に対してデータを送信する場合、判別回路３Ｖ
Ｃより、ループネットワーク１にデータが流れていない
時のみデータを送信する。受信ノード４では、以前の受
信データを処理中で新しいデータを受信できない場合に
は、送信回路５により、送信ノード２からの新しいデー
タは内部に取り込まない。このなめ、送信ノード２から
のデータはループネットワーク１上ｔ−まわり続けるこ
とになり、各送信ノードでは判別回路３によりデータを
送信せず送信を待つことになる。FIG. 1 is a block diagram of a loop network communication system according to an embodiment of the present invention, in which 1 is a loop network, 2Fi transmitting node, 3 is a discrimination circuit for determining whether transmission is possible, 4 is a receiving node, and 5 is a receiving node. This is a transmitting circuit that retransmits data. In this embodiment, when the transmitting node 2 transmits data to the receiving node 4, the discriminating circuit 3V
From C, data is transmitted only when no data is flowing to the loop network 1. If the receiving node 4 is processing previously received data and cannot receive new data, the transmitting circuit 5 does not take in the new data from the transmitting node 2 . As a result, the data from the transmitting node 2 continues to circulate on the loop network 1 for t times, and each transmitting node waits for transmission without transmitting the data by the determination circuit 3.

受信ノード４では、前データの処理が終了後新５・・・
受信データを再送する送信回路。After the receiving node 4 finishes processing the previous data, the new data 5...
A transmitting circuit that retransmits received data.

しいデータを取り込むため、これによってループネット
ワーク上に送信データがなくなる。このため、送信ノー
ド２でははじめて次のデータの送信が可能となる。This eliminates any transmitted data on the loop network since new data is captured. Therefore, the transmitting node 2 can transmit the next data for the first time.

（発明の効果） 以上説明したように本発明は、受信ノードの動作状態に
よって送信ノードからのデータを取り込まずにループネ
ットワーク上てまわし続けることにより、送信ノードで
はループネットワーク上にデータがある間は送信を禁止
することが可能となり、受信ノードのデータ処理速度に
あわせて送信ノードが送信を行うため、新旧データの衝
突が防止でき、データの鉄達が効率よく行える効果があ
る。(Effects of the Invention) As explained above, the present invention allows data from the sending node to continue to be passed on the loop network without being taken in depending on the operating state of the receiving node. It becomes possible to prohibit transmission, and since the transmitting node transmits according to the data processing speed of the receiving node, collisions between new and old data can be prevented, and data can be efficiently transferred.

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

第１図は本発明の実施例に係るループネットワーク通信
システムのブロック図である。 １・・・ループネットワーク、　　２・・・送信ノード
、３・・・送信の可否を判断する判別回路、４・・・受
信ノード、FIG. 1 is a block diagram of a loop network communication system according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Loop network, 2... Sending node, 3... Discrimination circuit that determines whether transmission is possible, 4... Receiving node,

Claims (1)

【特許請求の範囲】[Claims] データを伝達するループネットワークと、前記ループネ
ットワークの状態によりデータの送信の可否を判断する
機能を有する複数の送信ノードと、受信データの処理状
態によつて受信データを取り込まず再び前記ループネッ
トワークに送信する機能をもつ受信ノードとを有するこ
とを特徴とするループネットワーク送信規制方式。A loop network that transmits data; a plurality of transmitting nodes that have a function of determining whether data can be transmitted based on the state of the loop network; and depending on the processing state of the received data, the received data is not captured and sent to the loop network again. A loop network transmission regulation method characterized by having a receiving node having a function of
JP61225721A 1986-09-24 1986-09-24 Transmission control system for loop network Pending JPS6380643A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61225721A JPS6380643A (en) 1986-09-24 1986-09-24 Transmission control system for loop network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61225721A JPS6380643A (en) 1986-09-24 1986-09-24 Transmission control system for loop network

Publications (1)

Publication Number Publication Date
JPS6380643A true JPS6380643A (en) 1988-04-11

Family

ID=16833773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61225721A Pending JPS6380643A (en) 1986-09-24 1986-09-24 Transmission control system for loop network

Country Status (1)

Country Link
JP (1) JPS6380643A (en)

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