JPH0220132A - Data transmitting system - Google Patents

Data transmitting system

Info

Publication number
JPH0220132A
JPH0220132A JP16904988A JP16904988A JPH0220132A JP H0220132 A JPH0220132 A JP H0220132A JP 16904988 A JP16904988 A JP 16904988A JP 16904988 A JP16904988 A JP 16904988A JP H0220132 A JPH0220132 A JP H0220132A
Authority
JP
Japan
Prior art keywords
transmission
data
station
master station
slave
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
JP16904988A
Other languages
Japanese (ja)
Inventor
Yasumasa Imai
康雅 今井
Masaru Kuriyama
栗山 勝
Fumiki Sone
曽根 文樹
Tatsu Watari
亘理 達
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable Ltd
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 Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP16904988A priority Critical patent/JPH0220132A/en
Publication of JPH0220132A publication Critical patent/JPH0220132A/en
Pending legal-status Critical Current

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  • Time-Division Multiplex Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To minimize the time necessary for transmission control, shorten the transmission period, attain the soft data transmission and increase a transmission efficiency by combining a comparatively short data transmission and a comparatively long data transmission and forming one transmitting time. CONSTITUTION:Slave stations 3a-3n are connected through a bidirectional information transmission line 2 to a master station 1. In data transmission between the master station 1 and a slave station group 3, when the master station 1 fetches the data from any slave station out of the slave station group 3, the master station 1 sends a transmitting request signal to only one station out of the slave stations which become the object, and after the slave station receives the signal, the data are returned for the master station 1 in the specified time. The transmission from the slave station to the master station is constituted of time slots SD1-SDn to transmit the data, in which one transmission period is comparatively shorter in the sequence from a slave station 3 to 3n, by the repeating transmitting system with the period as T2 and a comparatively long time slot LDG to transmit the data by the slave station to receive the transmitting request from the master station 1.

Description

【発明の詳細な説明】 [産業上の利用分Il’F] 本発明は1つの親局と−ないし複数の子局間でデータ伝
送をするデータ伝送方式に係り、特に密結合無線に適用
することができるデータ伝送方式に関するものである。
[Detailed Description of the Invention] [Industrial Application Il'F] The present invention relates to a data transmission system for transmitting data between one master station and one or more slave stations, and is particularly applicable to tightly coupled radio. This relates to a data transmission method that can be used.

[従来の技術] 従来、1つの親局と−ないし複数の子局間でデータ伝送
をする方式には種々のものかある。
[Prior Art] Conventionally, there are various methods for transmitting data between one master station and one or more slave stations.

例えば第3図に示すように、情報伝送路103により接
続された親局100と子局群101間のデータ伝送にお
いて、親局100が子局# 101のいずれかの子局か
らデータを取込む場合に、親局100が対象となる子局
101aないし子局10111のうちの1局、例えは子
局101aに送信要求18号を送り、その子局101a
がその信号を受信した後、定められた時間内に親局10
0に対してそのデータを送り終える。
For example, as shown in FIG. 3, in data transmission between the master station 100 and the slave station group 101 connected by the information transmission path 103, when the master station 100 receives data from one of the slave stations #101. , the master station 100 sends transmission request No. 18 to one of the target slave stations 101a to 10111, for example, the slave station 101a, and the slave station 101a
After receiving the signal, the master station 10
Finish sending the data to 0.

この手順を時間軸上でのデータの流れ(タイムチャート
)として現したのが第4図である。
FIG. 4 shows this procedure as a data flow (time chart) on the time axis.

第4図を参照して説明するに、例えば、親局100から
送信要求信号Sl  (時間’r”o)か子局101a
に送られると、子局101aには所定時間T、経過後に
送信データD、(時間′r、)が送られる。そして、所
定時間Tb経過後に、次の信号要求S2が前記子局Io
1aに送られ、同様の動作か繰り返される。
To explain with reference to FIG. 4, for example, if the transmission request signal Sl (time 'r''o) from the master station 100 or the slave station 101a
When the data is sent to the slave station 101a, the transmission data D, (time 'r,) is sent to the slave station 101a after a predetermined time T has elapsed. Then, after a predetermined time Tb has elapsed, the next signal request S2 is sent to the slave station Io.
1a, and the same operation is repeated.

そして、この伝送方式では、最後のデータD。が送られ
、所定時間′I゛、が経過すると、再び最初の状態に戻
り親局100から送信要求信号Stか前記子局101a
に送られる。
In this transmission method, the last data D. is sent, and when a predetermined time 'I' has elapsed, the state returns to the initial state again and the transmission request signal St is sent from the master station 100 or the slave station 101a
sent to.

し発明か解決しようとする課題] かかる伝送方式では子局1局当りの送信データを長くし
、かつ送信繰り遅し周期′I゛1を短くすることか望ま
しいが、1局でも長いデータを送ろうとすると、時間1
゛4を長くしなければならないため、周期T1も長くな
ってしまう、また、この送信方式では子局群101から
親局100への送信チャンネルにおいて、例えばデータ
送信時のデータD1とデータ送信時の待ち時間や、親局
100か送信要求信号を送信している時間には送信かで
きないため伝送効率か悪くなり、伝送効率が良好なデー
タ伝送方式か要求される。
[Problems to be solved by the invention] In such a transmission system, it is desirable to lengthen the transmission data per slave station and shorten the transmission delay period 'I゛1, but it is difficult to transmit long data even to one station. Then time 1
In addition, in this transmission method, in the transmission channel from the slave station group 101 to the master station 100, for example, data D1 at the time of data transmission and data D1 at the time of data transmission are Since transmission is not possible during waiting time or when the master station 100 is transmitting a transmission request signal, the transmission efficiency deteriorates, and a data transmission method with good transmission efficiency is required.

本発明の目的は上記した従来の技術の課題に鑑みてなさ
れたもので、送信データ長か柔軟に変更でさ、かつ伝送
効率の高いデータ伝送方式を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention has been made in view of the above-mentioned problems of the conventional technology, and it is an object of the present invention to provide a data transmission system that allows for flexible changes in transmission data length and has high transmission efficiency.

[課題を解決するための手段] 上記[−1的を解決するための手段として、本発明の7
3−夕伝送方式は、−の親局と複数の子局からなり、該
了−局か時分割多重方式により同一伝送チャンネルを使
用することにより前記親局にデータを伝送するデータ伝
送方式であって、前記各γ′局かfム送周期毎に送信す
る比較的短いタイムスロツj・と、上記親局から送信要
求を受けた1局か送信4−る−ないし複数の比較的長い
タイムスロッ1〜とから1伝送周期を形成したものであ
る。まな、このデータ伝送方式の好ましい形態としては
、親局が全ての了−局に対して周期的に同期信号を送信
し、その子局が同期信号を受信した時刻を基壁にして(
云送周期の開始時刻を検出し、複数の子局が同時に送信
しないようにする。
[Means for Solving the Problems] As a means for solving the above-mentioned [-1], the seventh aspect of the present invention
The 3-night transmission system is a data transmission system that consists of a master station and a plurality of slave stations, and in which the master station transmits data to the master station by using the same transmission channel using a time division multiplexing method. Then, each γ' station transmits at a relatively short time slot j for every f transmission cycle, and one station that receives a transmission request from the master station transmits at a relatively long time slot 1 to 4 or a plurality of relatively long time slots One transmission period is formed from . The preferred form of this data transmission system is that the master station periodically transmits a synchronization signal to all the terminals, and the slave station transmits the synchronization signal based on the time when it receives the synchronization signal (
Detects the start time of the transmission cycle and prevents multiple slave stations from transmitting at the same time.

、” f1Jl’l 1 1つの伝送周期は、各−r−局か伝送周期4に送(1−
する比較的短いタイムスロットたけて構成されるのでは
なく、親局から送信要求を受?fな子局か送1、]ツる
一ないし複数の比較的長いタイムスロットを片む9この
比較的長いタイムスロットは、親局からの送信要求、あ
るいは子局に対する送信許可に基つき、特定のj′局か
親局に対して長いデータを送ISするのに初層できる。
, "f1Jl'l 1 One transmission period is sent to each -r- station or transmission period 4 (1-
Rather than consisting of relatively short time slots, the transmission request is received from the master station. 9 This relatively long time slot is specified based on a transmission request from the master station or transmission permission for the slave station. The initial layer can be used to send long data to either the j' station or the master station.

すべてか短いタイムスロットだりで1伝送周期を構成す
る場合は、1局でも長いデータを扱うことになれば11
云送周期ら長くなってしまうか、全タイムスロット中の
1または複数のタイムスロットだC1か比較的長くなっ
ているにすぎないので、結果としてγ−局の伝送周期が
短くなる。Utっで、送信効率の高い伝送方式となる。
If one transmission cycle is made up of all or short time slots, if even one station handles long data, 11
As a result, the transmission period of the γ-station becomes shorter, because one or more time slots C1 out of all the time slots are only relatively long. Ut is a transmission method with high transmission efficiency.

b’t=つて、親局が全子局に対し周期的に送ISする
同期信号の受1.)時刻を基準として所定のタイムスロ
ットに送信を開な−?することにより、7局の送信伝送
周期にずれを生じ同時に 2局以1−の1局か送信する
不都合は生じなくなる。
b't=Reception of the synchronization signal that the master station periodically sends to all slave stations 1. ) Start transmission at a predetermined time slot based on the time. By doing so, there will be no inconvenience that the transmission transmission cycles of the seven stations will be shifted and at the same time one of the two stations will be transmitting.

[実施例1 次に、本データ伝送方式の一実施例を第1図および第2
図を参照して説明する。
[Example 1] Next, an example of this data transmission method is shown in Figs. 1 and 2.
This will be explained with reference to the figures.

第1図は本データ伝送方式を適用したデータ伝送装置の
一実施例を示すブロック図、第2図は同タイミングチャ
ートである。
FIG. 1 is a block diagram showing an embodiment of a data transmission device to which this data transmission method is applied, and FIG. 2 is a timing chart of the same.

第1図において、符号1は親局で、この親局lに情報伝
送線路2を介して子局3aないし子局311が接続され
ている。なお、子局3aないし子局3 nにおいて、n
は整数を示し、また情報伝送&!路2はいわゆる双方向
情報伝送線路である。かかる装置では親局1と子局n3
間のデータ伝送において、親局1が子局群3のいずれか
の子局からデータを取込む場合に、親局1が対像となる
子局3aないし子局3nのうちの1局のみ、例えば子局
3aに送信要求信号を送り、その子局3aがその信号を
受信した後、定められた時間内に親局1に対して上述の
データを返送するように構成される。
In FIG. 1, reference numeral 1 denotes a master station, to which slave stations 3a to 311 are connected via an information transmission line 2. In addition, in slave station 3a to slave station 3n, n
indicates an integer, and also information transmission &! Line 2 is a so-called bidirectional information transmission line. In such a device, master station 1 and slave station n3
When the master station 1 receives data from one of the slave stations in the slave station group 3, the master station 1 receives data from only one of the slave stations 3a to 3n, for example, the slave station group 3. A transmission request signal is sent to the station 3a, and after the slave station 3a receives the signal, it is configured to return the above-mentioned data to the master station 1 within a predetermined time.

まな、この装置では子局から親局への伝送は、周期を′
r2とした繰返し伝送方式によって1伝送周期か子局3
aから子局3nまで順番に比較的短いデータを送信する
タイムスロットS D +〜SD。と、親局1から送信
要求を受けた子局3a〜子局3nがデータを送信する比
較的長いタイムスロットLD、から構成される。
However, in this device, the transmission from the slave station to the master station is
Depending on the repeat transmission method set to r2, one transmission cycle or three slave stations
Time slots S D + to SD in which comparatively short data is sequentially transmitted from a to the slave station 3n. and a relatively long time slot LD in which the slave stations 3a to 3n that have received a transmission request from the master station 1 transmit data.

かかる装置の好ましい形態としては、親局1か全子局3
に対して周期的に同期信号を送信し、これら子局3は同
期信号を受信した時刻を基準として伝送周期の開始時刻
を検知し、かつ同時に2局以上の子局3か送信すること
を避けるように構成されるものである。
A preferred form of such a device is that the master station 1 or all slave stations 3
These slave stations 3 detect the start time of the transmission cycle based on the time they receive the synchronization signal, and avoid transmitting from two or more slave stations 3 at the same time. It is configured as follows.

上記親局1は同期信号(図示せず)及び子局3g(1≦
g≦n)に対する長いデータの送信要求P、llを全て
の子局に送信する。この時、各子局3a〜3nでは同期
信号を受信した時刻を伝送周期の開始時刻とし、所定タ
イムスロット間に短いデータを送信し、また親局1から
長いデータの送信要求を受けた子局3gではタイムスロ
ツl−1、Doにおいて長いデータを送信する。
The master station 1 receives a synchronization signal (not shown) and a slave station 3g (1≦
A long data transmission request P, ll for g≦n) is transmitted to all slave stations. At this time, each of the slave stations 3a to 3n sets the time when the synchronization signal is received as the start time of the transmission cycle, and transmits short data between predetermined time slots, and the slave stations that receive a request to transmit long data from the master station 1 In 3g, long data is transmitted in time slots l-1 and Do.

この伝送°方式は複数地点から定期的にデータを収集す
るような通信システムに好適であり、例えば1局3をデ
ータ観a1点に配置して、データ観測装置(図示せず)
に接続すると共に、親局1をデータ収集装置に接続する
This transmission method is suitable for a communication system that periodically collects data from multiple points. For example, one station 3 is placed at one data observation point, and a data observation device (not shown) is
At the same time, the master station 1 is connected to the data collection device.

了−局3は(壺先度の高い情報のみを短いタイムスロッ
トSD、〜SD、で親局1に送信する。また親局1では
、詳細なデータが必要になると、子局3に対して送信要
求を発信し、この子局3がその要求に応えることにより
データが収集される。またこれとは逆に、子局3が短い
タイムスロットを用いて親局1に対して長いデータの送
信許可を求めることも可能である。従って、子局3が異
常等を検知し詳細なデータを送信しなければならないと
判断した場合には、親局1に対する送信許可を求め、直
ちに詳細な情報を送信することができる。
- Station 3 (transmits only high-level information to master station 1 in short time slots SD, ~SD). Also, when master station 1 needs detailed data, it sends information to slave station 3. Data is collected by transmitting a transmission request and the slave station 3 responding to the request.Conversely, the slave station 3 transmits long data to the master station 1 using a short time slot. It is also possible to request permission. Therefore, when the slave station 3 detects an abnormality and determines that detailed data must be sent, it can request transmission permission from the master station 1 and immediately send the detailed information. Can be sent.

また本装置において、親局lから子局3への伝送−1−
ヤンネルは子局3から親局1への伝送チャンイ・ルを使
用してもよいし、別のチャンネルを設けてもよい。別の
チャンネルを使用する場合には同期13号や送1工要求
信号Pgの送信はタイムスロットSD、等の送信と同時
になってもよい、また長いデータ用のタイムスロットは
1つの伝送周期期間に複数設けてもよい、この場合には
、親局1か送信要求を複数回送信することになる。
In addition, in this device, transmission-1- from the master station 1 to the slave station 3
The transmission channel from the slave station 3 to the master station 1 may be used, or another channel may be provided. When using another channel, the transmission of synchronization number 13 and transmission request signal Pg may be performed at the same time as the transmission of time slot SD, etc., and the time slot for long data is divided into one transmission cycle period. A plurality of them may be provided; in this case, the master station 1 will transmit the transmission request multiple times.

第1図に示す情報伝送線路2として、具体的には次のよ
うな無線方式、有線方式及び光ゲーブル方式の伝送線路
がある。
Specifically, the information transmission line 2 shown in FIG. 1 includes transmission lines of the following wireless type, wired type, and optical cable type.

無線方式においては、子局群3から親局11\の情報伝
送を同一の周波数を用いて行う。親局1から子局3への
情報伝送を同一周波数により行うが、別の周波数であっ
てもよい。
In the wireless system, information is transmitted from the slave station group 3 to the master station 11\ using the same frequency. Although information is transmitted from the master station 1 to the slave station 3 using the same frequency, different frequencies may be used.

有線方式は親局1と子局3間が双方向の情報伝送線路に
より接続されるものであり、ベースバンド方式あるいは
搬送波方式がある。この搬送波方式の場合は、親局1と
子局3の送信周波数を変えることにより、1つの・情報
伝送線路で2チヤンネルの伝送をすることかできる。
The wired system is one in which the master station 1 and the slave station 3 are connected by a bidirectional information transmission line, and includes a baseband system and a carrier wave system. In the case of this carrier wave system, by changing the transmission frequencies of the master station 1 and the slave station 3, two channels of transmission can be performed using one information transmission line.

また、光ゲープル方式では情報伝送線路2としてバス型
の光ゲーブルを用い、親局1と子局3間の情報伝送を行
う。
Furthermore, in the optical gable system, a bus-type optical cable is used as the information transmission line 2 to transmit information between the master station 1 and the slave stations 3.

かかる装置σでは1台の:1ンピュータと複数台のCR
i’端末装置間のデータ伝送にも有効で、この装置には
親局1をコンビ、1−夕に、また、子局3をCRT端末
装置に接続しているものがある。ここで、子局3は短い
タイムスロットで端末からの入力データの有無を送信す
るが、親局1は入力データのあった子局3に送信要求を
発し、この子局3から長いタイムスロットを用いて、入
力データを親局lに送信する。
Such a device σ has one computer and multiple CRs.
It is also effective for data transmission between i' terminal devices, and some of these devices have the master station 1 connected to a combination, and the slave station 3 connected to a CRT terminal. Here, the slave station 3 transmits the presence or absence of input data from the terminal in a short time slot, but the master station 1 issues a transmission request to the slave station 3 that had the input data, and the slave station 3 sends a long time slot. is used to transmit input data to the master station l.

以上のように、本データ伝送方式では比較的短いデータ
送信と比較的長いデータ送信を組み合わせることにより
伝送制御に要する時間が少なくなるので、伝送周期を短
くすることができ、かつ柔軟なデータ送信を可能にする
ので、伝送効率を高くすることができる。
As described above, this data transmission method reduces the time required for transmission control by combining relatively short data transmission and relatively long data transmission, making it possible to shorten the transmission cycle and realize flexible data transmission. Therefore, transmission efficiency can be increased.

[発明の効果] 上記のように本発明によれば、比較的短いデータ送(i
Eと比較的長いデータ送信とを組み合せることにより伝
送制御に要する時間が少なくなり、伝送周期を短くする
ことかでき、かつ柔軟なデータ送信か可能になるので、
伝送効率を高くすることができる。
[Effects of the Invention] As described above, according to the present invention, relatively short data transmission (i.e.
By combining E and relatively long data transmission, the time required for transmission control is reduced, the transmission cycle can be shortened, and flexible data transmission is possible.
Transmission efficiency can be increased.

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

第1図は本発明の一実施例を示す回路図、第2図は本発
明の一実施例を示すタイミンクチャート、第3図は従来
のデータ伝送装置の−・例を示す回路図、第・・1図は
同データ伝送装置の−・例を示すタイミングチャートで
ある。 図中、■は親局、2は情報伝送線路、3は子局群、3 
a P)至3■は子局である。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a timing chart showing an embodiment of the present invention, FIG. 3 is a circuit diagram showing an example of a conventional data transmission device, and FIG.・Figure 1 is a timing chart showing an example of the same data transmission device. In the figure, ■ is the master station, 2 is the information transmission line, 3 is the slave station group, 3
aP) to 3■ is a slave station.

Claims (1)

【特許請求の範囲】 1、一の親局と複数の子局からなり、該子局が時分割多
重方式により同一伝送チャンネルを使用することにより
前記親局にデータを伝送するデータ伝送方式において、
前記各子局が伝送周期毎に送信する比較的短いタイムス
ロットと、上記親局から送信要求を受けた子局が送信す
る一ないし複数の比較的長いタイムスロットとから1伝
送周期を形成したことを特徴とするデータ伝送方式。 2、前記親局が全ての子局に対して周期的に同期信号を
送信し、該子局が同期信号を受信した時刻を基準に伝送
周期の開始時刻を検出し、複数の子局が同時に送信しな
いようにしたことを特徴とする請求項1記載のデータ伝
送方式。
[Claims] 1. A data transmission system consisting of one master station and a plurality of slave stations, in which the slave stations transmit data to the master station by using the same transmission channel by time division multiplexing,
One transmission cycle is formed from a relatively short time slot that each of the slave stations transmits in each transmission cycle and one or more relatively long time slots that are transmitted by the slave stations that have received a transmission request from the master station. A data transmission method characterized by 2. The master station periodically transmits a synchronization signal to all slave stations, detects the start time of the transmission cycle based on the time when the slave station receives the synchronization signal, and multiple slave stations simultaneously 2. The data transmission method according to claim 1, wherein the data transmission method is configured such that the data is not transmitted.
JP16904988A 1988-07-08 1988-07-08 Data transmitting system Pending JPH0220132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16904988A JPH0220132A (en) 1988-07-08 1988-07-08 Data transmitting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16904988A JPH0220132A (en) 1988-07-08 1988-07-08 Data transmitting system

Publications (1)

Publication Number Publication Date
JPH0220132A true JPH0220132A (en) 1990-01-23

Family

ID=15879379

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16904988A Pending JPH0220132A (en) 1988-07-08 1988-07-08 Data transmitting system

Country Status (1)

Country Link
JP (1) JPH0220132A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007135163A (en) * 2005-10-13 2007-05-31 Denso Corp Communications system and method, and distributed control system and method
JP4679691B2 (en) * 1999-05-06 2011-04-27 トムソン ライセンシング Method for automatically adjusting time slot period and system for data communication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4679691B2 (en) * 1999-05-06 2011-04-27 トムソン ライセンシング Method for automatically adjusting time slot period and system for data communication
JP2007135163A (en) * 2005-10-13 2007-05-31 Denso Corp Communications system and method, and distributed control system and method

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