JPS647529B2 - - Google Patents
Info
- Publication number
- JPS647529B2 JPS647529B2 JP58046908A JP4690883A JPS647529B2 JP S647529 B2 JPS647529 B2 JP S647529B2 JP 58046908 A JP58046908 A JP 58046908A JP 4690883 A JP4690883 A JP 4690883A JP S647529 B2 JPS647529 B2 JP S647529B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- terminal
- information
- transmission
- bit
- 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.)
- Expired
Links
- 230000005540 biological transmission Effects 0.000 claims description 34
- 238000001514 detection method Methods 0.000 claims description 15
- 230000008054 signal transmission Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 101100493897 Arabidopsis thaliana BGLU30 gene Proteins 0.000 description 4
- 101100310686 Mus musculus Spata4 gene Proteins 0.000 description 4
- 101000651041 Homo sapiens Swi5-dependent recombination DNA repair protein 1 homolog Proteins 0.000 description 3
- 102100027777 Swi5-dependent recombination DNA repair protein 1 homolog Human genes 0.000 description 3
- 102100024619 Synaptotagmin-12 Human genes 0.000 description 2
- 101710161888 Synaptotagmin-12 Proteins 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 101150020421 SFR2 gene Proteins 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Communication Control (AREA)
Description
【発明の詳細な説明】
(1) 発明の技術分野
本発明はデイジタル端末が送信要求信号を送出
したとき相手端末からの応答を待つて、回線終端
装置が端末に対し送信可信号を送出することによ
り、端末間通信を確実なものとする信号方式に関
する。[Detailed Description of the Invention] (1) Technical Field of the Invention The present invention provides a system in which, when a digital terminal sends a transmission request signal, a line termination device waits for a response from the other terminal and then sends a transmission ready signal to the terminal. This invention relates to a signaling system that ensures reliable communication between terminals.
(2) 従来技術と問題点
信号の送受信方式は従来第１図に示すような構
成となつている。送信すべき信号を持つている送
信端末DTE１が回線終端装置DCE１を介して交
換機NWと接続され、他の端末DTE２へ送出す
るとき、まず端末DTE１から回線終端装置DCE
１へ送信要求信号RSを発する。この信号が相手
回線終端装置DCE２で受信されたことを確認で
きれば、伝送路が確保できたからそのとき送信す
べき信号を送出すれば良いが、従来装置では前記
確認ができなかつた。それは従来の構成では伝送
路と回線終端装置がアナログ型であつたから、他
の回線終端装置DCE２において、たとえ送信要
求信号RSを正常に受信しても、そのことを回線
終端装置DCE１へ向け返答する手段が設けられ
てなかつた。そのため回線終端装置DCE１内で
は送信可信号CSの発生装置CSGとタイマTMと
を内蔵しておき、前記送信要求信号RSを送信端
末DTE１より受けたときにタイマTMの計時を
開始させる。そして交換機NWと他の回線終端装
置DCE１が正常に動作して、送信要求信号RSを
受信しRSによつて発生するキヤリーを検出し、
端末DTE２にキヤリー検出信号CDを送出するの
に十分な時間の経過を待つ。この時間が経過した
とき回線終端装置DCE１は送信可信号CSを端末
DTE１に向けて送出し、DTE１から送信すべき
信号の送出を開始させる。この場合CSは他の端
末も含んだシステムの正常な動作を検出して送出
されたものでないから、送信すべき信号が相手回
線終端装置DCE２へ正常に到達できるか否か全
く不明であつた。(2) Prior art and problems The signal transmission and reception system has conventionally been configured as shown in Figure 1. When the transmitting terminal DTE1, which has a signal to be transmitted, is connected to the exchange NW via the line termination device DCE1 and sends it to another terminal DTE2, first the terminal DTE1 is connected to the exchange NW via the line termination device DCE1.
It issues a transmission request signal RS to 1. If it can be confirmed that this signal has been received by the other party's line terminating device DCE2, the transmission path has been secured and the signal to be transmitted can be sent at that time, but with conventional devices, this confirmation was not possible. In the conventional configuration, the transmission line and line termination device were analog type, so even if another line termination device DCE2 receives the transmission request signal RS normally, it sends a reply to the line termination device DCE1. No means were provided. For this reason, the line termination device DCE1 has a built-in transmittable signal CS generator CSG and a timer TM, and when the transmission request signal RS is received from the transmitting terminal DTE1, the timer TM starts counting. Then, the exchange NW and the other circuit termination device DCE1 operate normally, receive the transmission request signal RS, detect the carry generated by the RS,
Wait for sufficient time to elapse to send the carry detection signal CD to the terminal DTE2. When this time has elapsed, the circuit terminating device DCE1 sends a clear-to-send signal CS to the terminal.
The signal is sent to DTE1, and DTE1 starts transmitting the signal to be transmitted. In this case, since the CS was not sent after detecting the normal operation of the system including other terminals, it was completely unclear whether the signal to be sent could normally reach the other party's line termination device DCE2.
(3) 発明の目的
本発明の目的は前述の欠点を改善し比較的簡易
な手段で、受信側の回線終端装置から応答信号を
送出可能とし、送信側の回線終端装置は自己端末
に対し送出する送信可信号を信頼性の高いものと
したデイジタル信号伝送方式を提供することにあ
る。(3) Purpose of the Invention The purpose of the present invention is to improve the above-mentioned drawbacks and to enable the line termination device on the receiving side to send a response signal by relatively simple means, and the line termination device on the transmitting side to transmit a response signal to its own terminal. An object of the present invention is to provide a digital signal transmission system that makes a transmittable signal highly reliable.
(4) 発明の構成
前記の目的を達成するための本発明の構成は、
回線終端装置を介して交換機と接続されたデイジ
タル端末が、他のデイジタル端末へ信号を伝送す
るとき、該端末から回線終端装置への送信要求信
号に対し、回線終端装置から当該端末へ送出可信
号を送出する信号伝送方式において、前記回線終
端装置間の伝送情報に特定２ビツト信号を含み、
該２ビツト信号の一方を送信要求信号に、他方を
キヤリー検出完了信号に割合て、前記交換機を経
て受信する回線終端装置においては、受信情報中
の前記送信要求信号の信号情報をキヤリー検出完
了信号として受信側の前記デイジタル端末に向け
て送出する手段を設けるとともに、前記送信要求
信号の信号情報を送信側の回線終端装置へ送る伝
送情報中のキヤリー検出完了信号の位置に挿入す
る手段を設け、送信側の回線終端装置は、該キヤ
リー検出信号の検出により送信可信号をデイジタ
ル端末へ送出することである。(4) Structure of the invention The structure of the present invention to achieve the above object is as follows:
When a digital terminal connected to an exchange via a line terminating device transmits a signal to another digital terminal, in response to a transmission request signal from the terminal to the line terminating device, the line terminating device sends a send permission signal to the terminal. In the signal transmission method for sending out a specific 2-bit signal, the transmission information between the line termination devices includes a specific 2-bit signal;
One of the 2-bit signals is used as a transmission request signal, and the other is used as a carry detection completion signal, and the line terminating device that receives the signal via the exchange converts the signal information of the transmission request signal in the received information into a carry detection completion signal. and means for inserting the signal information of the transmission request signal into the position of the carry detection completion signal in the transmission information to be sent to the line termination device on the transmitting side. The line termination device on the transmitting side sends a transmittable signal to the digital terminal upon detection of the carry detection signal.
(5) 発明の実施例
第２図は本発明の一実施例の構成を示すブロツ
ク図であつて、第１図と同一符号は同様のものを
示す。第２図では端末DTE１，DTE２はデイジ
タル端末を示すものとする。回線終端装置DCE
１，DCE２は、信号ビツト割当手段と送信可信
号の送出手段とを具備する。送信側回線終端装置
DCE１は第３図Ａに示すように送信すべきデイ
ジタル伝送情報SGの例えば前後に、信号ビツト
Ｓ０，Ｓ１として各１ビツトずつの特定信号を設
け、一方の信号ビツトＳ０は自端末からの送信要
求信号RSがあつた時に使用するもので、他方Ｓ
１は相手からの応答をみるキヤリー検出完了信号
に割当てる。送信可信号CSの送出手段は送信可
信号CSの発生器CSGを設け、返答情報SG′中の
信号ビツトＳ１の情報をみることによりセツトさ
れていれば相手からの応答ありとし端末DTE１
へ送信可信号CSを伝送することである。(5) Embodiment of the Invention FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention, and the same reference numerals as in FIG. 1 indicate the same parts. In FIG. 2, terminals DTE1 and DTE2 are digital terminals. Line termination equipment DCE
1, the DCE 2 is equipped with signal bit allocation means and transmittable signal sending means. Sending line termination equipment
As shown in FIG. 3A, the DCE1 provides specific signals of one bit each as signal bits S0 and S1, for example before and after the digital transmission information SG to be transmitted, and one signal bit S0 is a transmission request from the own terminal. This is used when the signal RS is hot, and the other signal S
1 is assigned to the carry detection completion signal for checking the response from the other party. The transmitting means for transmitting the clear signal CS is provided with a generator CSG for the clear signal CS, and by checking the information of the signal bit S1 in the response information SG', if it is set, it is determined that there is a response from the other party, and the terminal DTE1
The purpose is to transmit a clear-to-send signal CS to the sender.
回線終端装置DCE１はデイジタル端末DTE１
より送信要求信号を受けると交換機を介してデイ
ジタル伝送情報SGとをDCE２向けに送出する。
回線終端装置DCE２では信号受信変換装置SRT
を設け、端末DTE２に対する送信情報SGを受信
するとその旨キヤリー検出信号CDを該端末DTE
２に送出するとともに、第３図Ｂに示すように受
信した情報SG中の信号ビツトＳ０の信号を返送
情報SG′の信号ビツトＳ１に挿入し、送信端末へ
この信号を送り返す。 Line termination device DCE1 is digital terminal DTE1
When it receives a transmission request signal from the switch, it sends the digital transmission information SG to the DCE 2 via the exchange.
In the line termination device DCE2, the signal reception conversion device SRT
When the transmission information SG for the terminal DTE2 is received, a carry detection signal CD to that effect is sent to the terminal DTE.
At the same time, as shown in FIG. 3B, the signal of the signal bit S0 in the received information SG is inserted into the signal bit S1 of the return information SG', and this signal is sent back to the transmitting terminal.
回線終端装置DCE１は第３図Ｂの返送情報
SG′を交換機NWを介して受信し、信号ビツトＳ
１が“１”となつていることを検出し、送信要求
が回線終端装置DCE２に到達したことを知る。
そして端末DTE１への送信可信号CSを発生さ
せ、該CS信号を端末DTE１へ送出する。 The line termination device DCE1 returns the information shown in Figure 3B.
SG′ is received via the exchange NW, and the signal bit S
It detects that 1 has become "1" and knows that the transmission request has reached the line terminating device DCE2.
Then, it generates a transmission enable signal CS to the terminal DTE1, and sends the CS signal to the terminal DTE1.
各回線終端装置における機能はDCE１とDCE
２とで、それぞれ送信側、受信側として説明した
が、本例に限らずDCE１が受信側、DCE２が送
信側となつても以下同様である。第２図で示した
信号受信変換装置の構成は通常のレジスタとシフ
トレジスタとを複数個具備し、第４図に示すよう
に構成される。即ち第３図Ａ，Ｂと示す直列デー
タを、並列データに変換するｎビツトのシフトレ
ジスタSFR１、並列データを直列データに変換
するｎビツトのシフトレジスタSFR２、同様な
ｎ−２ビツトのシフトレジスタSFR３，SFR４、
ｎビツトの通常のレジスタSRG１，SRG２とを
図示するように接続しておく。DRは送出駆動
器、RVは受信器を示す。第４図の装置がDCE１
として動作するときは、RS端子から信号RSが到
来して起動され、第３図Ａの信号をSRG２にお
いて作成し、送出駆動器DRを介して受信端末
（左方）へ交換機を介して送出する。このDCE１
に返答情報がくるときは左上方の受信端子RVか
ら信号を受信し、シフトレジスタSFR１におい
て並列データとなる。本例では第ｎビツトが取出
され送信可信号CSとするので、ここに“１”が
立つているとき相手端末DTE２側が準備できた
と認識し、端末DTE１へ信号CSが送られる。 The functions of each line termination device are DCE1 and DCE
2 and 2 are respectively referred to as a transmitting side and a receiving side, but this is not limited to this example, and the same applies hereinafter even if the DCE1 is the receiving side and the DCE2 is the transmitting side. The configuration of the signal receiving and converting device shown in FIG. 2 includes a plurality of ordinary registers and shift registers, and is configured as shown in FIG. 4. That is, an n-bit shift register SFR1 that converts serial data to parallel data as shown in FIG. 3A and B, an n-bit shift register SFR2 that converts parallel data to serial data, and a similar n-2-bit shift register SFR3. ,SFR4,
The n-bit ordinary registers SRG1 and SRG2 are connected as shown in the figure. DR indicates a transmission driver, and RV indicates a receiver. The device in Figure 4 is DCE1
When operating as a switch, the signal RS arrives from the RS terminal and is activated, the signal shown in Figure 3A is created in SRG2, and sent via the sending driver DR to the receiving terminal (on the left) via the exchange. . This DCE1
When response information arrives, the signal is received from the upper left receiving terminal RV, and becomes parallel data in the shift register SFR1. In this example, the n-th bit is taken out and used as the send ready signal CS, so when "1" is set here, it is recognized that the destination terminal DTE2 is ready, and the signal CS is sent to the terminal DTE1.
次に第４図の装置がDCE２として動作すると
きは左上方の端子RVから送信要求信号RSが、第
３図Ａの信号SGとして到来する。SFR１におい
て並列データに変換され、レジスタSRG１に格
納される。両端のビツトを除くｎ−２ビツトのデ
ータは、ｎ−２ビツトのシフトレジスタSFR３
において直列データとされ、図示しない端末
DTE２へデータとして送られる。レジスタSRG
１の第１ビツトＱ０は第３図において送信要求信
号相当の信号ビツトＳ０であり、これをｎビツト
レジスタSRG２の第ｎビツトとして挿入すると
共に、キヤリー検出信号CDとして右方へ送出す
る。ｎビツトレジスタSRG２はこの信号ビツト
Ｓ０を信号ビツトＳ１へ乗せ替えて交換機を介
し、送信端末側の方（左方）へ送出する。 Next, when the device of FIG. 4 operates as DCE2, the transmission request signal RS arrives from the upper left terminal RV as the signal SG of FIG. 3A. It is converted into parallel data in SFR1 and stored in register SRG1. The n-2 bit data excluding the bits at both ends is transferred to the n-2 bit shift register SFR3.
Serial data is stored at a terminal (not shown).
Sent as data to DTE2. register SRG
The first bit Q0 of 1 is the signal bit S0 corresponding to the transmission request signal in FIG. 3, and this is inserted as the n-th bit of the n-bit register SRG2 and sent to the right as the carry detection signal CD. The n-bit register SRG2 transfers the signal bit S0 to the signal bit S1 and sends it to the transmitting terminal side (left side) via the exchange.
(6) 発明の効果
このようにして本発明によれば、送信要求信号
を受付けた回線終端装置が、相手となる他の回線
終端装置からの応答を受信してから、自己の端末
へ送信可信号を送出しているから、従来の信号方
式と比較し、端末間に回線が正常に設定されたこ
との確認が容易にできる。また、送信要求信号を
受付けた回線終端装置において、従来必要とされ
ていたタイマを内蔵する必要がないため、構成が
簡易になる効果を有する。(6) Effects of the Invention In this manner, according to the present invention, a line terminating device that has received a transmission request signal can send the signal to its own terminal after receiving a response from another line terminating device. Because signals are sent, it is easier to confirm that the line has been set up correctly between terminals compared to conventional signaling methods. Furthermore, since there is no need to incorporate a timer, which was conventionally required, in the line termination device that receives the transmission request signal, the configuration can be simplified.
第１図は従来の信号の送受信方式の構成を示す
図、第２図は本発明の一実施例の構成を示す図、
第３図は伝送信号の例を示し、Ａが送信情報、Ｂ
が受信情報を示す図、第４図は回線終端装置の構
成の例を示す図である。
DTE１，DTE２……端末、DCE１，DCE２…
…回線終端装置、NW……交換機、RS……送信
要求信号、CD……キヤリー検出信号、CS……送
信可信号、SFR……シフトレジスタ、SRG……
レジスタ。
FIG. 1 is a diagram showing the configuration of a conventional signal transmission/reception system, and FIG. 2 is a diagram showing the configuration of an embodiment of the present invention.
Figure 3 shows an example of a transmission signal, where A is the transmission information, B
is a diagram showing received information, and FIG. 4 is a diagram showing an example of the configuration of a line termination device. DTE1, DTE2...Terminal, DCE1, DCE2...
…Line termination equipment, NW…Switchboard, RS…Send request signal, CD…Carry detection signal, CS…Send clear signal, SFR…Shift register, SRG…
register.
Claims (1)
イジタル端末が、他のデイジタル端末へ信号を伝
送するとき、該端末から回線終端装置への送信要
求信号に対し、回線終端装置から当該端末へ送出
可信号を送出する信号伝送方式において、前記回
線終端装置間の伝送情報に特定２ビツト信号を含
み、該２ビツト信号の一方を送信要求信号に、他
方をキヤリー検出完了信号に割当て、前記交換機
を経て受信する回線終端装置においては、受信情
報中の前記送信要求信号の信号情報をキヤリー検
出完了信号として受信側の前記デイジタル端末に
向けて送出する手段を設けるとともに、前記送信
要求信号の信号情報を送信側の回線終端装置へ送
る伝送情報中のキヤリー検出完了信号の位置に挿
入する手段を設け、送信側の回線終端装置は、該
キヤリー検出信号の検出により送信可信号をデイ
ジタル端末へ送出することを特徴とするデイジタ
ル信号伝送方式。1. When a digital terminal connected to an exchange via a line terminating device transmits a signal to another digital terminal, the line terminating device may send a signal to the terminal in response to a transmission request signal from the terminal to the line terminating device. In a signal transmission method for sending a signal, transmission information between the line termination devices includes a specific 2-bit signal, one of the 2-bit signals is assigned to a transmission request signal, the other is assigned to a carry detection completion signal, and the information is transmitted via the exchange. The receiving line terminating device is provided with means for transmitting the signal information of the transmission request signal in the received information as a carry detection completion signal to the digital terminal on the receiving side, and transmits the signal information of the transmission request signal. Means is provided for inserting the carry detection completion signal in the transmission information sent to the line terminating device on the transmitting side, and the line terminating device on the transmitting side sends a ready-to-send signal to the digital terminal upon detection of the carry detection signal. A distinctive digital signal transmission method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58046908A JPS59172868A (en) | 1983-03-19 | 1983-03-19 | Digital signal transmitting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58046908A JPS59172868A (en) | 1983-03-19 | 1983-03-19 | Digital signal transmitting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59172868A JPS59172868A (en) | 1984-09-29 |
| JPS647529B2 true JPS647529B2 (en) | 1989-02-09 |
Family
ID=12760453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58046908A Granted JPS59172868A (en) | 1983-03-19 | 1983-03-19 | Digital signal transmitting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59172868A (en) |
-
1983
- 1983-03-19 JP JP58046908A patent/JPS59172868A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59172868A (en) | 1984-09-29 |
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