JPH0482440A - Multiplex link data transfer system - Google Patents
Multiplex link data transfer systemInfo
- Publication number
- JPH0482440A JPH0482440A JP2197164A JP19716490A JPH0482440A JP H0482440 A JPH0482440 A JP H0482440A JP 2197164 A JP2197164 A JP 2197164A JP 19716490 A JP19716490 A JP 19716490A JP H0482440 A JPH0482440 A JP H0482440A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- frame
- data
- slave station
- rej
- 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
- 230000005540 biological transmission Effects 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
Landscapes
- Synchronisation In Digital Transmission Systems (AREA)
- Time-Division Multiplex Systems (AREA)
- Small-Scale Networks (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は親局と複数の子局間に多重リンクを設定してデ
ータ転送を行なう多重リンクデータ転送方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multilink data transfer system in which data is transferred by setting up multiple links between a master station and a plurality of slave stations.
不平衡型データリンクによる多重リンクを設定しデータ
転送を行なう場合は、二次局どうしのデータ送信の衝突
を制御する必要がある。従来の方法として正規応答モー
ドを使用して衝突を発生させない方法や、衝突検出をお
こなって再送をする方法が取られてきた。When setting up multiple links using unbalanced data links and performing data transfer, it is necessary to control data transmission collisions between secondary stations. Conventional methods include using a normal response mode to prevent collisions, and detecting collisions and retransmitting data.
上述した従来の多重リンクデータ転送方式は、正規応答
モードを使用する方法はポーリングを行うためデータの
転送効率が悪く、衝突検出を行う方法は回路構成が複雑
であるという欠点がある。The above-described conventional multilink data transfer methods have disadvantages in that the method using the normal response mode has poor data transfer efficiency due to polling, and the method using collision detection requires a complicated circuit configuration.
本発明の多重リンクデータ転送方式は、親局と複数の子
局間でＨＤＬＣ手順による多重リンクを設定しデータ転
送を行う方式において、前記親局と前記複数の子局のそ
れぞれとの間を集線装置を介して接続し、前記集線装置
内に前記子局からのデータ送信開始を検出する手段と、
前記複数の子局のそれぞれからのデータ送信を調停する
手段と、１つの子局を選択して前記親局と接続し送信フ
レームを転送する手段と、送信フレームから送信順序番
号を識別しＲＥＪフレームを作成する手段と、前記子局
に対する送信フレームを送信する手段とを有し、アウト
スタンディングフレーム数を１として通信を行う構成で
ある。The multilink data transfer method of the present invention is a method in which data is transferred by setting up multiple links between a master station and a plurality of slave stations using an HDLC procedure, in which a line is concentrated between the master station and each of the plurality of slave stations. means for connecting through the device and detecting the start of data transmission from the slave station within the line concentrator;
means for arbitrating data transmission from each of the plurality of slave stations; means for selecting one slave station and connecting it to the master station to transfer the transmission frame; and means for identifying a transmission sequence number from the transmission frame and transmitting the REJ frame. and means for transmitting a transmission frame to the slave station, and is configured to perform communication with one outstanding frame.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示すブロック図である。親
局１が集線装置３を介して複数の子局２−１〜２−ｎと
接続される。FIG. 1 is a block diagram showing one embodiment of the present invention. A master station 1 is connected to a plurality of slave stations 2-1 to 2-n via a line concentrator 3.
集線装置３は、子局２−１〜２−ｎのそれぞれからのデ
ータ送信開始を検出するデータ送信検出部（ＤＥＴ）４
−１〜４−ｎと、それらのデータ送信を調停するデータ
送信調停部（ＡＲＢ＞７と、データ送信調停部７の制御
を受は子局２−１〜２−ｎのうち１つの選択して親局１
と接続し送信フレームを転送する子局選択部（ＳＥＬ）
８と、送信フレームから送信順序番号を識別しＲＥＪフ
レームを作成するＲＥＬフレーム作成部（ＲＥＪ）５−
１〜５−ｎと、データ送信調停部７の制御を受は対応す
る子局２−１〜２−ｎに送信フレームを送信するフレー
ム送信部（ＳＮＤ）６−１〜６−ｎとを備えている。The line concentrator 3 includes a data transmission detection section (DET) 4 that detects the start of data transmission from each of the slave stations 2-1 to 2-n.
-1 to 4-n, a data transmission arbitration unit (ARB>7) that arbitrates their data transmission, and one of the slave stations 2-1 to 2-n that receives control of the data transmission arbitration unit 7 is selected. Master station 1
Slave station selection unit (SEL) that connects with and transfers transmission frames
8, and a REL frame creation unit (REJ) 5- that identifies a transmission sequence number from a transmission frame and creates an REJ frame.
1 to 5-n, and frame transmitting units (SND) 6-1 to 6-n that receive the control of the data transmission arbitration unit 7 and transmit transmission frames to the corresponding slave stations 2-1 to 2-n. ing.
次に、動作を説明する。Next, the operation will be explained.
データ送信検出部（ＤＥＴ） ４−１〜４−ｎは、それ
ぞれ対応する子局２−１〜２−ｎからのデータが“１”
の連続から変化したことを検出してデータ送信開始を検
出する。また、データ送信の終了はデータの“１″連続
により検出する６子局２−１〜２−ｎからのデータ送信
の衝突制御はデータ送信調停部（ＡＲＢ）７により行な
う。データ送信調停部（ＡＲＢ）７では各子局２−１〜
２−ｎがらのデータ送信開始を比較して最初の子局を選
択する。その選択結果により子局選択部（ＳＥＬ）８を
起動し１つの子局からの送信フレームを親局１に中継す
る。Data transmission detection units (DET) 4-1 to 4-n each have data “1” from the corresponding slave stations 2-1 to 2-n.
The start of data transmission is detected by detecting a change from the continuity of . Further, the end of data transmission is detected by continuous "1" data. Collision control of data transmission from the six slave stations 2-1 to 2-n is performed by a data transmission arbitration unit (ARB) 7. In the data transmission arbitration unit (ARB) 7, each slave station 2-1 to
The first slave station is selected by comparing the start of data transmission from 2-n. Based on the selection result, a slave station selection unit (SEL) 8 is activated and a transmission frame from one slave station is relayed to the master station 1.
また、データ送信を開始したが選択されながった子局２
−１〜２−ｎに対しデータの再送をさせる必要がある。In addition, the slave station 2 that started data transmission but was not selected
It is necessary to cause data to be retransmitted for -1 to 2-n.
再送要求を子局２−１〜２−ｎに対して通知する手段と
してＲＥＪフレームを使用する。ＲＥＪフレーム作成部
（ＲＥＪ）５−１〜５−ｎでは対応する子局２−１〜２
−ｎからの送信フレームを監視して送信順序番号を識別
しておく。データ送信調停部（ＡＲＢ）７がら非選択を
通知された場合その送信順序番号を使用してＲＥＪフレ
ームを作成し対応するフレーム送信部（ＳＮＤ）６−１
〜６−ｎを経由して子局２−１〜２−ｎに送信する。こ
のときフレーム送信部（ＳＮＤ＞６−１〜６−ｎでは親
局１からの送信フレームとの衝突を制御する必要がある
一ＲＥＪＲＥＪフレームタ長が短いため、親局１がらの
送信フレームにデイレイをもたせる等の方法で、容易に
ＲＥＪフレームを割り込ませ衝突を回避することができ
る。The REJ frame is used as a means of notifying the slave stations 2-1 to 2-n of a retransmission request. In the REJ frame creation units (REJ) 5-1 to 5-n, the corresponding slave stations 2-1 to 2
- Monitor the transmission frame from n and identify the transmission sequence number. When the data transmission arbitration unit (ARB) 7 is notified of non-selection, the transmission order number is used to create a REJ frame and the corresponding frame transmission unit (SND) 6-1
~6-n to the slave stations 2-1 to 2-n. At this time, the frame transmitter (for SND > 6-1 to 6-n, it is necessary to control collisions with the frame transmitted from the master station 1).Since the REJREJ frame length is short, there is a delay in the frame transmitted from the master station 1. It is possible to easily interrupt the REJ frame and avoid collisions.
子局２−１〜２−ｎではこのＲＥＪフレームを受信して
再送を行う。このときアウト・スタンディング・フレー
ム数を１としているので、親局からのレスポンスとＲＥ
Ｊフレームとが影響し合うことはない。The slave stations 2-1 to 2-n receive this REJ frame and retransmit it. At this time, since the number of out-standing frames is 1, the response from the master station and the RE
There is no interaction with the J frame.
以上説明したように、本発明は簡単な回路でデータ送信
の衝突を検出しＲＥＪフレームにより再送を要求するこ
とにより多数の子局と親局を多重リンクで接続したデー
タ転送システムを容易に実現できる効果がある。As explained above, the present invention has the effect of easily realizing a data transfer system in which a large number of slave stations and a master station are connected by multiple links by detecting a data transmission collision using a simple circuit and requesting retransmission using an REJ frame. There is.
また、本発明では基本的にフレームの中継のみを行って
、終端を行なわない方式なので、データ転送のデイレイ
が少なく、多段階の集線も可能となる効果がある。Furthermore, since the present invention basically performs only frame relaying without terminating, it has the effect of reducing data transfer delay and making multi-stage line concentration possible.
第１図は本発明の一実施例を示すブロック図である。
１・・・親局、２−１〜２−ｎ・・・子局、３・・・集
線装置、４−１〜４−ｎ・・・データ送信検出部（ＤＥ
Ｔ）、５−１〜５−ｎ・・−ＲＥＪフレーム作成部（Ｒ
ＥＪ ） 、６−１〜６−ｎ−フレーム送信部（ＳＮＤ
）、７・・・データ送信調停部（ＡＲＢ＞、８・・・子
局選択部（ＳＥＬ）。FIG. 1 is a block diagram showing one embodiment of the present invention. 1... Master station, 2-1 to 2-n... Slave station, 3... Line concentrator, 4-1 to 4-n... Data transmission detection section (DE
T), 5-1 to 5-n...-REJ frame creation section (R
EJ), 6-1 to 6-n-frame transmitter (SND
), 7...Data transmission arbitration unit (ARB>, 8...Slave station selection unit (SEL).
Claims (1)
設定しデータ転送を行う方式において、前記親局と前記
複数の子局のそれぞれとの間を集線装置を介して接続し
、前記集線装置内に前記子局からのデータ送信開始を検
出する手段と、前記複数の子局のそれぞれからのデータ
送信を調停する手段と、１つの子局を選択して前記親局
と接続し送信フレームを転送する手段と、送信フレーム
から送信順序番号を識別しＲＥＪフレームを作成する手
段と、前記子局に対する送信フレームを送信する手段と
を有し、アウトスタンディングフレーム数を１として通
信を行うことを特徴とする多重リンクデータ転送方式。In a method of setting up multiple links and transferring data between a master station and a plurality of slave stations using an HDLC procedure, the master station and each of the plurality of slave stations are connected via a line concentrator, and the line concentrator means for detecting the start of data transmission from the slave station; means for arbitrating data transmission from each of the plurality of slave stations; and means for selecting one slave station and connecting it to the master station to send a transmission frame. It is characterized by having a means for transferring, a means for identifying a transmission order number from a transmission frame and creating an REJ frame, and a means for transmitting a transmission frame to the slave station, and performing communication with the number of outstanding frames being 1. A multilink data transfer method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2197164A JPH0482440A (en) | 1990-07-25 | 1990-07-25 | Multiplex link data transfer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2197164A JPH0482440A (en) | 1990-07-25 | 1990-07-25 | Multiplex link data transfer system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0482440A true JPH0482440A (en) | 1992-03-16 |
Family
ID=16369847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2197164A Pending JPH0482440A (en) | 1990-07-25 | 1990-07-25 | Multiplex link data transfer system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0482440A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8714836B2 (en) | 2009-08-07 | 2014-05-06 | Fujitsu Component Limited | Optical/electrical composite connector and manufacturing method thereof |
| US20140157956A1 (en) * | 2011-07-19 | 2014-06-12 | Koninklijke Philips N.V. | Domestic appliance comprising an actuator |
-
1990
- 1990-07-25 JP JP2197164A patent/JPH0482440A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8714836B2 (en) | 2009-08-07 | 2014-05-06 | Fujitsu Component Limited | Optical/electrical composite connector and manufacturing method thereof |
| US20140157956A1 (en) * | 2011-07-19 | 2014-06-12 | Koninklijke Philips N.V. | Domestic appliance comprising an actuator |
| US10364811B2 (en) * | 2011-07-19 | 2019-07-30 | Koninklijke Philips N.V. | Domestic appliance comprising an actuator |
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