JPS6130834A - Data transmission control system - Google Patents
Data transmission control systemInfo
- Publication number
- JPS6130834A JPS6130834A JP15142084A JP15142084A JPS6130834A JP S6130834 A JPS6130834 A JP S6130834A JP 15142084 A JP15142084 A JP 15142084A JP 15142084 A JP15142084 A JP 15142084A JP S6130834 A JPS6130834 A JP S6130834A
- Authority
- JP
- Japan
- Prior art keywords
- token
- time
- transmission
- frame
- node
- 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
Links
Abstract
Description
【発明の詳細な説明】
【技術分Ｙｆ１
本発明は通信媒体を介して複数の伝送装置を接続したネ
ットワークシステムのデータ伝送制御方式に関し、特に
トークンパッシング方式のデータ伝送におけるトークン
の周回時間が一定時間以上になる様制御するデータ伝送
制御方式に関するものである。Detailed Description of the Invention [Technical Part Yf1] The present invention relates to a data transmission control method for a network system in which a plurality of transmission devices are connected via a communication medium, and in particular, in data transmission using a token passing method, the token circulation time is a certain period of time. The present invention relates to a data transmission control method for controlling the above conditions.
［従来技術］
従来、トークンパッシング方式のデータ伝送においては
１つのトークンをネットワークに接続された伝送装置（
以下ノードと称す）総べてに巡回させ、このトークンを
受信したノードのみが送信権を獲得し、データを送信可
能とすることにより伝送路上でのデータの衝突をなくす
様にしていた。[Prior Art] Conventionally, in token passing data transmission, one token is transferred to a transmission device (
The token is circulated to all nodes (hereinafter referred to as nodes), and only the node that receives the token acquires the right to transmit data, thereby eliminating data collisions on the transmission path.
しかし、ノードは伝送路とノートに接続される情報処理
装置（以下ホストと称す）との間の制御を司どり、伝送
路との送受信制御、ホストとの送受信制御及びホスト、
伝送路よりのデータをフォーマツティングする等の制御
処理を行なっている。これらの処理を行なわなければな
らないためトークンの周回速度が速くなると伝送路より
の受信データの処理（フラグ判別、アドレス判別能）に
費やす時間が多くなり、他の処理を実行する時間が圧迫
されてしまい、結果としてシステム全体としての効率が
劣化してしまっていた。However, the node manages the control between the transmission path and the information processing device (hereinafter referred to as host) connected to the notebook, and controls the transmission and reception with the transmission path, the transmission and reception control with the host, and the host.
It performs control processing such as formatting data from the transmission path. Because these processes have to be performed, as the token circulation speed increases, more time is spent processing the data received from the transmission line (flag discrimination, address discrimination ability), and the time to perform other processes is squeezed. As a result, the efficiency of the system as a whole deteriorated.
［目的］
本発明は上述の従来例の欠点を除去することを目的とし
、ネットワークシステム内を周回するトークンの周回時
間を一定時間以上に保つことにより、システム全体の伝
送効率を上げるデータ伝送制御方式を提案することにあ
る。[Objective] The present invention aims to eliminate the drawbacks of the conventional example described above, and provides a data transmission control method that increases the transmission efficiency of the entire system by keeping the circulation time of tokens circulating within a network system at a certain time or more. The aim is to propose the following.
［実施例］
以下、図面を参照して本発明の一実施例について説明す
る。[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例のバス状ネットワークシステ
ムの構成図であり、図中１は伝送路、２．３，４．５は
伝送制御装置（以下ノードと称す）、６，７，８．９は
ノードに接続された各種端末装置である。また１０は伝
送路ｌよりの受信データフレームがトークンか否かを判
別するトークン判別回路、１１はタイマであリド−クン
送出回路１３が伝送路１ヘト−クンを送出した時点から
前記トークン判別回路１０のトークンの受信を判別した
時点の時間を測定している。１２は比較部であり、タイ
マ１１の値とタイマ設定回路１４の値との比較を行なう
、１３は伝送路１にトークンを送出するトークン送出回
路、１４はシステムの効率が最大となる様に選ばれた一
定時間の値を保持するタイマ設定回路である。FIG. 1 is a configuration diagram of a bus-like network system according to an embodiment of the present invention, in which 1 is a transmission path, 2.3, 4.5 are transmission control devices (hereinafter referred to as nodes), 6, 7, 8.9 are various terminal devices connected to the node. Further, 10 is a token discriminating circuit for discriminating whether or not the received data frame from the transmission line 1 is a token, and 11 is a timer which starts from the time when the redokun sending circuit 13 sends the token to the transmission line 1. The time at which it was determined that 10 tokens were received was measured. Reference numeral 12 is a comparison unit, which compares the value of the timer 11 and the value of the timer setting circuit 14. Reference numeral 13 is a token sending circuit that sends the token to the transmission path 1. Reference numeral 14 is a selection unit that is selected so as to maximize the efficiency of the system. This is a timer setting circuit that holds the value for a certain period of time.
次にノード２を例に本実施例の伝送制御を第２図のフロ
ーチャートを参照して説明する。Next, the transmission control of this embodiment will be explained using node 2 as an example with reference to the flowchart of FIG.
ノードはステップＳｌで伝送路ｌより伝送フレームが受
信されるのを監視し、伝送フレームが送られてくるとス
テップＳ２に進み、フレーム中の宛先アドレスを調べ、
自ノードアドレスと−・致し、自ノード宛のフレームで
あるか否かを調べる。自ノード宛フレームでない場合に
はステップＳ１に戻り自ノード宛フレームの受信を待つ
。In step Sl, the node monitors whether a transmission frame is received from transmission path l, and when the transmission frame is sent, it proceeds to step S2, checks the destination address in the frame, and
Checks whether the frame is addressed to the own node by matching it with the own node address. If the frame is not addressed to the own node, the process returns to step S1 and waits for reception of the frame addressed to the own node.
自ノード宛のフレームの場合にはステップ＄３でトーク
ンフレームか否かを調べ、トークンフレームでなければ
データ伝送フレームでありステップＳ４で通常受信処理
を行なう。通常受信処理が終了するとステップＳ１に戻
る。If the frame is addressed to the own node, it is checked in step $3 whether it is a token frame or not, and if it is not a token frame, it is a data transmission frame and normal reception processing is performed in step S4. When the normal reception process ends, the process returns to step S1.
ステップＳ３にてトークンフレームの場合にはステップ
Ｓ５に進み、端末装置よりの送信要求があるか否かを調
べ、送信要求があればステップＳ６にて送信処理を実行
し、ステップＳ７に進む。送信要求のない場合にはその
ままステップＳ５よりステップＳ７に進む。If it is a token frame in step S3, the process advances to step S5 to check whether there is a transmission request from the terminal device. If there is a transmission request, a transmission process is executed in step S6, and the process advances to step S7. If there is no transmission request, the process directly advances from step S5 to step S7.
ステップＳ７では比較部１２でタイマ１１の計時時間と
タイマ設定回路１４での設定値との比較を行ない、タイ
マ１１の計時時間がタイマ設定回路１４での設定値以上
の場合には後述のステップＳ９に進み、設定値以上でな
い場合にはステップＳ８に進み、タイマ１１の計時時間
がタイマ設定回路１４の設定値以上になるのを待ち、そ
の後ステップＳ９に進み、トークン送出回路により）−
クンを次のノードに対して送出する。そしてステップＳ
ＩＯでタイマ１１をリスタートさせてステップＳ１に戻
る。In step S7, the comparator 12 compares the time measured by the timer 11 with the set value in the timer setting circuit 14, and if the time measured by the timer 11 is greater than or equal to the set value in the timer setting circuit 14, step S9 described below If the time is not equal to or greater than the set value, the process proceeds to step S8, and waits until the time measured by the timer 11 becomes equal to or greater than the set value of the timer setting circuit 14, and then proceeds to step S9, where the token sending circuit
Send the command to the next node. and step S
The timer 11 is restarted by IO and the process returns to step S1.
以上の様に制御する事によりトークンの周回時間が確実
にタイマ設定回路１４の設定時間以上になる。By controlling as described above, the token circulation time is reliably equal to or longer than the time set by the timer setting circuit 14.
また以上の説明ではバス状ネットワークシステムに各ノ
ードを接続した例を説明したが、本発明はループ状ネッ
トワークシステムにも用いる事ができる。Further, in the above explanation, an example has been described in which each node is connected to a bus-like network system, but the present invention can also be used in a loop-like network system.
本発明をこのループ状ネットワークシステムに用いた例
を第３図に示す。FIG. 3 shows an example in which the present invention is applied to this loop network system.
第３図において第１図と同様構成については同一番号を
附した。In FIG. 3, the same components as in FIG. 1 are given the same numbers.
図中１′はループ状伝送路であり、伝送フレームは図示
の矢印Ａで示した方向でネットワークシステム上を周回
する。In the figure, 1' is a loop-shaped transmission line, and the transmission frame circulates on the network system in the direction indicated by arrow A in the figure.
この場合の伝送制御はノードに到達したトークンフレー
ムハ全て自ノード宛データフレームであるため直ちに端
末装置よりの送信要求に従い、必要に応じて送信処理が
行なわれる。In this case, the transmission control is such that since the token frames that arrive at the node are all data frames addressed to the node itself, transmission processing is performed as necessary immediately in accordance with the transmission request from the terminal device.
またトークンに引き続き送られてくるデータフレーム中
の宛先アドレスを調べ自ノード宛データフレームに関し
ては受信処理を実行する。この場合にトークンを送出す
るタイミングは第２図ステップ３７〜ステツプＳＩＯに
示した制御と全く同様である。It also checks the destination address in the data frame sent following the token and executes reception processing for the data frame addressed to its own node. In this case, the timing of sending the token is exactly the same as the control shown in steps 37 to SIO in FIG. 2.
以上の説明ではノード２を例に説明したが他のノードに
おいても同様構成同様制御を行なうことによりさらに確
実にトークン周回時間のコントロールが行なえる。In the above explanation, node 2 has been explained as an example, but the token circulation time can be controlled more reliably by performing the same configuration and control in other nodes as well.
一方、他のノードは何らの特別の処理を行なわない場合
にもノード２のみが上述の構成、制御を備えることによ
りトークン周回速度が必要以上に速くなることはない。On the other hand, even if the other nodes do not perform any special processing, since only node 2 has the above-described configuration and control, the token circulation speed will not become faster than necessary.
［効果］
以上説明した様に本発明によれば、トークン周回時間を
一定時間以上にすることができ、不必要な伝送制御を行
なうことのない、システム全体の伝送効率を向上させる
ことのできるデータ伝送制御方式が提供できる。[Effects] As explained above, according to the present invention, the token circulation time can be made longer than a certain period of time, and the data transmission efficiency of the entire system can be improved without performing unnecessary transmission control. A transmission control method can be provided.
第１図は本発明に係る一実施例のネットワークシステム
構成図、
第２図は本実施例におけるデータ伝送制御フローチャー
ト、
第３図は本発明に係る他の実施例のネットワークシステ
ム構成図である。
図において、１，１′・・・伝送路、２〜５・・・ノー
ド、６〜９・・・端末装置、１０・・・トークン刺刃１
［回路、１１・・・タイマ、１２・・・比較部、１３・
・・トークン送出回路、１４・・・タイマ設定回路であ
る。
特許 出願人 キャノン株式会社
第２図
第３図FIG. 1 is a network system configuration diagram of one embodiment according to the present invention, FIG. 2 is a data transmission control flowchart in this embodiment, and FIG. 3 is a network system configuration diagram of another embodiment according to the present invention. In the figure, 1, 1'...transmission line, 2-5...node, 6-9...terminal device, 10...token stabbing blade 1
[Circuit, 11... Timer, 12... Comparison section, 13.
. . . Token sending circuit, 14 . . . Timer setting circuit. Patent Applicant Canon Co., Ltd. Figure 2 Figure 3
Claims (3)
権委譲命令であるトークンにより送信権を委譲するネッ
トワークシステムのデータ伝送制御方式において、前記
伝送装置に前記トークンの送出後所定時間の計時を行な
う計時手段と、前記トークンの送出後自装置宛トークン
を受け取つた時点での前記計時手段の計時時間が前記所
定時間以内かを判別する判別手段とを備え、該判別手段
により前記計時手段の計時時間が所定時間以内と判別し
た時には計時時間が所定時間以上になるのを待つてトー
クンを他装置宛に送出する様制御することを特徴とする
データ伝送制御方式。(1) In a data transmission control method for a network system in which a plurality of transmission devices are connected via a communication medium and the transmission right is delegated using a token, which is a transmission right delegation command, the transmission right is sent to the transmission device for a predetermined period of time after sending the token. A clocking means for measuring time; and a determining means for determining whether the time measured by the clocking means at the time when the token addressed to the device is received after sending the token is within the predetermined time, and the determining means determines whether the time measured by the clocking means is within the predetermined time. A data transmission control method characterized in that, when it is determined that the time measured by the device is within a predetermined time, the method waits until the time measured exceeds the predetermined time and then controls the token to be sent to another device.
体により互いに接続されていることを特徴とする特許請
求の範囲第１項記載のデータ伝送制御方式。(2) The data transmission control method according to claim 1, wherein the transmission devices of the network system are connected to each other by a bus-like communication medium.
してループ状に接続されていることを特徴とする特許請
求の範囲第１項記載のデータ伝送制御方式。(3) The data transmission control method according to claim 1, wherein the transmission devices of the network system are connected in a loop via a communication medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15142084A JPS6130834A (en) | 1984-07-23 | 1984-07-23 | Data transmission control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15142084A JPS6130834A (en) | 1984-07-23 | 1984-07-23 | Data transmission control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6130834A true JPS6130834A (en) | 1986-02-13 |
Family
ID=15518226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15142084A Pending JPS6130834A (en) | 1984-07-23 | 1984-07-23 | Data transmission control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6130834A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0254648A (en) * | 1988-08-19 | 1990-02-23 | Omron Tateisi Electron Co | Bus type lan |
| JPH02246444A (en) * | 1989-03-18 | 1990-10-02 | Hitachi Ltd | Data transmission mechanism and system therefor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58170247A (en) * | 1982-03-31 | 1983-10-06 | Fujitsu Ltd | Automatic loop back controlling system |
| JPS59158161A (en) * | 1983-02-14 | 1984-09-07 | プライム・コンピュータ・インコーポレイテッド | Method and device for detecting and reproducing erased tokenin data communication network based on token |
| JPS6077551A (en) * | 1983-10-05 | 1985-05-02 | Canon Inc | Data transmission control system |
| JPS60253350A (en) * | 1984-05-30 | 1985-12-14 | Hitachi Ltd | Control system for communication of information |
-
1984
- 1984-07-23 JP JP15142084A patent/JPS6130834A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58170247A (en) * | 1982-03-31 | 1983-10-06 | Fujitsu Ltd | Automatic loop back controlling system |
| JPS59158161A (en) * | 1983-02-14 | 1984-09-07 | プライム・コンピュータ・インコーポレイテッド | Method and device for detecting and reproducing erased tokenin data communication network based on token |
| JPS6077551A (en) * | 1983-10-05 | 1985-05-02 | Canon Inc | Data transmission control system |
| JPS60253350A (en) * | 1984-05-30 | 1985-12-14 | Hitachi Ltd | Control system for communication of information |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0254648A (en) * | 1988-08-19 | 1990-02-23 | Omron Tateisi Electron Co | Bus type lan |
| JPH02246444A (en) * | 1989-03-18 | 1990-10-02 | Hitachi Ltd | Data transmission mechanism and system therefor |
| JPH0750887B2 (en) * | 1989-03-18 | 1995-05-31 | 株式会社日立製作所 | Data transmission method and system |
| US5426638A (en) * | 1989-03-18 | 1995-06-20 | Hitachi, Ltd. | Transmission method and system thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4494233A (en) | Method and apparatus for the detection and regeneration of a lost token in a token based data communications network | |
| EP0137438B1 (en) | Method for passing a token in a local-area network | |
| US4737953A (en) | Local area network bridge | |
| US4799052A (en) | Method for communicating data on a communication network by token passing | |
| US4561092A (en) | Method and apparatus for data communications over local area and small area networks | |
| US4516122A (en) | Communication system with collision detection and forced collision | |
| JPS63149939A (en) | Token passing method for communication network and the communication network | |
| US5426638A (en) | Transmission method and system thereof | |
| JPS63175549A (en) | Poling | |
| US5191580A (en) | Communication response control method | |
| US4511968A (en) | Communication channel interface unit | |
| JPS6130834A (en) | Data transmission control system | |
| JP3479816B2 (en) | Token passing communication method | |
| JPH0575622A (en) | Emergency communication control system with priority | |
| JPS58171150A (en) | Communication system equivalent to loop | |
| JP3112778B2 (en) | Token re-generation method | |
| JP2724567B2 (en) | Priority data transmission control method in LAN | |
| JPS6165642A (en) | Data communication system | |
| JPS6021651A (en) | Network system | |
| JPH10262073A (en) | Node alignment order check system for ring-type network | |
| JPS6215953A (en) | Data transmission control system | |
| JPS6069935A (en) | Data communication system | |
| JPS616952A (en) | Data transmission system | |
| JPH11205365A (en) | Token passing type data transfer system | |
| JPS59148448A (en) | Priority system of branched type network |