JPS58142654A - Transmitting system - Google Patents

Transmitting system

Info

Publication number
JPS58142654A
JPS58142654A JP57025211A JP2521182A JPS58142654A JP S58142654 A JPS58142654 A JP S58142654A JP 57025211 A JP57025211 A JP 57025211A JP 2521182 A JP2521182 A JP 2521182A JP S58142654 A JPS58142654 A JP S58142654A
Authority
JP
Japan
Prior art keywords
frame
transmission
control
bits
signal
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
JP57025211A
Other languages
Japanese (ja)
Inventor
Shogo Nasu
那須 昭吾
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP57025211A priority Critical patent/JPS58142654A/en
Publication of JPS58142654A publication Critical patent/JPS58142654A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00Arrangements for synchronising receiver with transmitter
    • H04L7/04Speed or phase control by synchronisation signals
    • H04L7/048Speed or phase control by synchronisation signals using the properties of error detecting or error correcting codes, e.g. parity as synchronisation signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To improve the utilization efficiency of a transmission line, by reducing the number of time slots for synchronism control when the length of time slot is short. CONSTITUTION:When sending a transmission frame, a control station sends received signals as they are at T0, T1, T2,...TR-1, sends signals S0, S1, S2,...Sm of each bit of a control signal at Ai, and sends a complementary numbers ''1'' of the content of Ai at frames until the m-th frame and a signal having the same content as Ai has at the (m+1)-th frame at Bi. The other station already knows the length of one frame and detects that the exclusive OR of continuous two bits is ''1'' for (m) frames and ''0'' at the (m+1)-th frame and make the frame synchronization. Moreover, by utilizing that the above-mentioned exclusive OR at the (m+1)-th frame is ''0'', the control signal transmitted by Ai is confirmed.

Description

【発明の詳細な説明】 この発明は、1本の伝送路に仲数の局とこれらの局を制
御する1つの制御局が接続された伝送システム、特にそ
の伝送フレームの同ル1をとる手段に関するものである
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission system in which a number of stations and one control station that controls these stations are connected to one transmission path, and in particular, a means for keeping the same number of transmission frames. It is related to.

第1図は従来の伝送システムにおける伝送フレームの構
成の一例を示す詣明図である。
FIG. 1 is a diagram showing an example of the structure of a transmission frame in a conventional transmission system.

1フレームはそれぞれnビットよりなる複数のタイムス
ロットによって構成され、フレームの先頭Vcid n
ビットの連続する“0″よりなるタイムスロットがある
。普通、このタイムスロットk 同期スロットと呼ぶ。
One frame consists of multiple time slots each consisting of n bits, and the beginning of the frame Vcid n
There is a time slot consisting of consecutive "0" bits. This time slot k is usually called a synchronous slot.

この同期スロットの?& [先頭の”1″のビットと任
意データのn−1ビツトより々るタイムスロットが続い
ている。通常、同期スロットの直後のタイムスロットは
制御局からの制御信号伝送のために用いられる。その他
のタイムスロットは各局間の通信信号伝送のために用い
られる。
Of this sync slot? & [A time slot consisting of the leading "1" bit and n-1 bits of arbitrary data follows. Usually, the time slot immediately after the synchronization slot is used for transmitting control signals from the control station. Other time slots are used for transmitting communication signals between stations.

制411局以外の局はそれぞれnビットの連トn・する
”0″と、それvcW?、<“1 ″を検出することに
よQI リ、伝送フレームの同期をとっていた。
Each station other than the control 411 station sends a series of n bits "0" and vcW? , <“1”, the QI re-synchronizes the transmission frame.

従来の伝送システムにおける伝送フレームは以上のよう
に構成されているので、1つのタイムスロット内のデー
タ長が短いと、タイムスロットの先頗の”1″のフレー
ム中に占める割合が無視できなくなり、伝送路利用効率
の低下をきたすという欠点があった。
Transmission frames in conventional transmission systems are configured as described above, so if the data length in one time slot is short, the proportion of the first "1" in the time slot in the frame cannot be ignored. This has the disadvantage of reducing the efficiency of using the transmission path.

この発明は、上記のような従来のものの欠点を除去する
ため[3されたもので、制御信号の各ビットに同期信号
が重畳するように構成した伝送路利用効率のよい伝送シ
ステムを提供することを目的としている。
The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional system.It is an object of the present invention to provide a transmission system that is configured to superimpose a synchronization signal on each bit of a control signal and has good transmission path utilization efficiency. It is an object.

以下、この発明の一実施例を図について説明するO 第2図はこの発明の一実施例における伝送フレームの構
成の一例を示す説明図である。At + Biは制御信
号および同期信号用の1ピツト長のタイムスロット、T
o 、Tt 、 T2 、 =−Tk−1,Tkは1ビ
ツト長のタイムスロットを示す。
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is an explanatory diagram showing an example of the structure of a transmission frame in an embodiment of the present invention. At + Bi is a one-pit long time slot for control and synchronization signals, T
o, Tt, T2, =-Tk-1, Tk indicates a 1-bit length time slot.

第3図は第2図に示す構成のm+1個の伝送フレームの
一例を示す説明図、第4図は第3図に示す伝送フレーム
での制御信号を示す説明図である。
FIG. 3 is an explanatory diagram showing an example of m+1 transmission frames having the configuration shown in FIG. 2, and FIG. 4 is an explanatory diagram showing control signals in the transmission frames shown in FIG. 3.

伝送路にはS。、 So、 Too、 T、。、・・・
鑵、 Sm。
S in the transmission line. , So, Too, T. ,...
Kui, Sm.

・・・+ 1 kmの順に送出される。制御何月はS。...+1 km. The control month is S.

、Sl。, Sl.

・・・Smである。...Sm.

制御局は、伝送フレームケ送出するとき、To。When the control station sends out a transmission frame, the control station sets To.

T、’r、・・・、T   、T では受信した信号音
そ2R−IR のまま送出し、Aiでは制御信号の各ビットの1に号B
6 + 81 * 82 、=・、Smを送出し、Bi
  では第3図に示すようKm番目までのフレームでF
iAi  の内容の1の補数、m+1番目のフレームで
FiAiの内容と同じ信号を送出する。他の局は、あら
かじめ1フレームの長さを知っており、連続する2ビツ
トの排他的論理和がmフレーム連続して1であり、m+
1番目のフレームにおいて0であることを検出し、71
/−ム同期をとる。更に、m+1番目のフレームにおけ
る上記排他的論51i和が0であることを利用して、A
iで伝送されてくる制御信号を容易に確認することがで
きる。
At T, 'r,..., T, T, the received signal tone 2R-IR is sent as is, and at Ai, the signal B is set to 1 of each bit of the control signal.
6 + 81 * 82 ,=・, send Sm, Bi
Then, as shown in Figure 3, F in frames up to the Kmth
The one's complement of the contents of iAi is the m+1th frame, and the same signal as the contents of FiAi is transmitted. The other stations know the length of one frame in advance, and the exclusive OR of consecutive 2 bits is 1 for m consecutive frames, and m+
It is detected that it is 0 in the first frame, and 71
/- synchronize. Furthermore, by using the fact that the above exclusive theory 51i sum in the m+1th frame is 0, A
The control signal transmitted by i can be easily confirmed.

上記実施例では、At * Biタイムスロットell
jll接配置としたが、間隔さえ一定であれば、フレー
ム中のどこに配置してもかまわない。
In the above embodiment, At*Bi time slot ell
However, as long as the spacing is constant, it does not matter where they are placed in the frame.

以上のように、この発明によれば、タイムスロット長が
短い場合、同期制御のだめのタイムスロットが少h〈な
り、伝送路の利用効率が向上するという効果がある。
As described above, according to the present invention, when the time slot length is short, the number of time slots available for synchronization control is reduced, and the efficiency of use of the transmission path is improved.

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

第1図は従来の伝送システムにおける伝送フレームの構
成の一例を示す贈4明図、第2図はこの発明の一実施例
における伝送フレームの構成の一例を示す説明図、第3
図は第2図に示す構成のm+1個の伝送フレームの一例
を示す説明図、第4図は第3図に示す伝送フレームでの
制御信号を示す説明図である。 代理人 葛 野 信 一
FIG. 1 is a diagram showing an example of the configuration of a transmission frame in a conventional transmission system, FIG. 2 is an explanatory diagram showing an example of the configuration of a transmission frame in an embodiment of the present invention, and FIG.
This figure is an explanatory diagram showing an example of m+1 transmission frames having the configuration shown in FIG. 2, and FIG. 4 is an explanatory diagram showing control signals in the transmission frame shown in FIG. 3. Agent Shinichi Kuzuno

Claims (1)

【特許請求の範囲】[Claims] 1本の伝送路に複数の局とこれらの局を制御する1つの
制御局が接続された伝送システムにおいて、制御局が各
伝送フレームの定められた位置の各ビットと上記定めら
れた位置から定められた順番目の各ビットによって制御
信号を構成し、上記定められた位置のビットとこのビッ
トから上記定められた順番目のビットとけm(mは任意
の整数)フレーム連続して互に反対論理の信号を送出し
m+1番目のフレームにおいて同−論理の信号を送出す
る手段と、複数の局がそれぞれ上虻制御局から送出され
る各伝送フレームの上記定められた位置の各ビットの信
号と上配定められた位置から定められた順番目の位置の
対応する各ビットの信号との排他的論理和を検出して伝
送フレーム同期をとる手段とを備えたことを特徴とする
伝送システム、         1t1
In a transmission system in which multiple stations and one control station that controls these stations are connected to one transmission path, the control station performs a Each bit in the specified order constitutes a control signal, and the bits in the specified position and the bits in the specified order are connected for m consecutive frames (m is any integer) and have opposite logics to each other. means for transmitting a signal of the same logic in the m+1th frame; A transmission system comprising means for synchronizing a transmission frame by detecting an exclusive OR with a signal of each bit corresponding to a predetermined sequential position from a predetermined position, 1t1.
JP57025211A 1982-02-18 1982-02-18 Transmitting system Pending JPS58142654A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57025211A JPS58142654A (en) 1982-02-18 1982-02-18 Transmitting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57025211A JPS58142654A (en) 1982-02-18 1982-02-18 Transmitting system

Publications (1)

Publication Number Publication Date
JPS58142654A true JPS58142654A (en) 1983-08-24

Family

ID=12159621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57025211A Pending JPS58142654A (en) 1982-02-18 1982-02-18 Transmitting system

Country Status (1)

Country Link
JP (1) JPS58142654A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62154932A (en) * 1985-12-27 1987-07-09 Omron Tateisi Electronics Co Data transmission system among plural equipments
JPS6412639A (en) * 1987-07-06 1989-01-17 Omron Tateisi Electronics Co Digital data transmission exchange system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62154932A (en) * 1985-12-27 1987-07-09 Omron Tateisi Electronics Co Data transmission system among plural equipments
JPS6412639A (en) * 1987-07-06 1989-01-17 Omron Tateisi Electronics Co Digital data transmission exchange system

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