JPH04113749A - System for transmitting constant interval short fixed length data - Google Patents
System for transmitting constant interval short fixed length dataInfo
- Publication number
- JPH04113749A JPH04113749A JP2233711A JP23371190A JPH04113749A JP H04113749 A JPH04113749 A JP H04113749A JP 2233711 A JP2233711 A JP 2233711A JP 23371190 A JP23371190 A JP 23371190A JP H04113749 A JPH04113749 A JP H04113749A
- Authority
- JP
- Japan
- Prior art keywords
- reception
- data transmission
- fixed length
- data
- fixed
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Communication Control (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、固定長データ伝送方式に関し、特に伝送間隔
が一定でその間隔に比しデータ送信時間が短かい伝送方
式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fixed length data transmission system, and particularly to a transmission system in which the transmission interval is constant and the data transmission time is short compared to the interval.
従来、固定長データ伝送方式では、送信側と受信側の同
期が乱された場合、同期の回復が困難であった。Conventionally, in fixed-length data transmission systems, if the synchronization between the transmitting side and the receiving side is disrupted, it is difficult to recover the synchronization.
例えばデータ受信の終了を固定長、または長い一定の時
間のタイムアウトで検出する方式では、第４図に示すよ
うに同期が乱れると、送信の部分ａと部分すの受信で受
信バッファが一杯となり、部分すの終端で受信終了とさ
れこの状態が繰り返えされ、同期の乱れが回復しない。For example, in a method that detects the end of data reception using a fixed length or a long fixed time timeout, if the synchronization is disrupted as shown in Figure 4, the reception buffer becomes full with the reception of transmission parts a and part s. The reception ends at the end of the partial frame, and this state is repeated, and the synchronization disorder is not recovered.
そのために従来は、データの終りに特別なコードストッ
パーを付加し、送信時は固定長で送信し、受信時は固定
長でなくストッパーによりデータ終了を検出する方式、
また送信時は固定長で送信し、受信時は固定長でなくデ
ータが一定時間こないことをもってデータ終了を検出す
る方式等が用いられていた。To this end, conventional methods include adding a special code stopper to the end of the data, transmitting it with a fixed length when transmitting, and detecting the end of data with the stopper instead of the fixed length when receiving.
In addition, a method was used in which a fixed length was used for transmission, and a fixed length was not used for reception, and the end of the data was detected when the data did not arrive for a certain period of time.
この従来の固定長データ伝送方式のうちストッパーを用
いた方式ではストッパーのコードをデータ内で使用でき
ない問題点があり、一定時間データかこないことを用い
た方式ではデータ受信検出がデータ伝送完了より遅れる
問題点がある。Among these conventional fixed-length data transmission methods, the method using a stopper has the problem that the stopper code cannot be used in the data, and the method that uses the data not passing for a certain period of time causes data reception detection to be delayed after data transmission is completed. There is a problem.
口課題を解決するための手段〕
本発明の定間隔短円定長データ伝送方式は、データ伝送
定間隔をデータ伝送時間のＮ倍とし、データ伝送定間隔
のＮ分のＮ−１を受信タイムアウト時間とする固定長の
受信Ａと、データ伝送定間隔のＮ分の２を受信タイムア
ウト時間とする固定長の受信Ｂとを備え、Ｎを４以上と
し、前記受信ＡまたはＢてタイムアウトとなれば次に前
記受信Ａを行い、前記受信ＡまたはＢでデータ受信すれ
ば次に前記受信Ｂを行うことを特徴とする。[Means for Solving the Problems] In the fixed interval short circle fixed length data transmission method of the present invention, the data transmission fixed interval is set to N times the data transmission time, and the reception timeout is N-1 of N of the data transmission fixed interval. A fixed-length reception A whose reception time is set as the time, and a fixed-length reception B whose reception timeout time is 2/N of the fixed data transmission interval, where N is 4 or more, and when the reception A or B times out. Next, the reception A is performed, and if data is received by the reception A or B, the reception B is performed next.
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〜第３図は本発明の一実施例を示す図である。本
実施例は送信側は固定長で送信し、データ伝送定間隔を
データ伝送時間の５倍とした場合である。受信側はデー
タ伝送定間隔の５分の４を受信タイムアウト時間とする
固定長の受信Ａと、データ伝送定間隔の５分の２を受信
タイムアウト時間とする固定長の受信Ｂとを備えている
。1 to 3 are diagrams showing one embodiment of the present invention. In this embodiment, the transmitting side transmits data in a fixed length, and the data transmission regular interval is set to five times the data transmission time. The receiving side is equipped with a fixed-length reception A whose reception timeout time is four-fifths of the data transmission regular interval, and a fixed-length reception B whose reception timeout time is two-fifths of the data transmission regular interval. .
受信側が固定長の受信Ａを行なった場合、データ受信す
れば次に固定長の受信Ｂを行ない、タイムアウトなら次
に固定長の受信Ａを繰り返す。受信側が固定長の受信Ｂ
を行なった場合、データ受信すれば次に固定長の受信Ｂ
を繰り返し、タイムアウトなら次に固定長の受信Ａを行
なう３固定長の受信Ａを行なってタイムアウトの場合は
次も固定長の受信Ａを縁り返す。When the receiving side performs fixed-length reception A, if data is received, then fixed-length reception B is performed, and if a timeout occurs, then fixed-length reception A is repeated. Receiving side has fixed length reception B
When data is received, fixed-length reception B is performed.
is repeated, and if a timeout occurs, the next fixed-length reception A is performed.3Fixed-length reception A is performed, and if a timeout occurs, the next fixed-length reception A is repeated.
第１図は受信側がまず受信Ａてデータ受信した以降の正
常なデータ伝送例てあり、受信Ａは毎回タイムアウトに
なる前にデータ受信し、受信Ｂは毎回タイムアウトをお
こす。FIG. 1 shows an example of normal data transmission after the receiving side first receives data at receiver A. Receiver A receives data before a timeout occurs every time, and receiver B causes a timeout every time.
第２図は受信側がまず受信Ｂでデータ受信した以降の正
常なデータ伝送例であり、後半は第１図に等しい。FIG. 2 shows an example of normal data transmission after the receiving side first receives data at reception B, and the latter half is the same as FIG. 1.
第３図は送信側の送信間隔がずれ、受信側が受信中受信
Ａでタイムアウトが発生した異常な伝送例であり、高々
３回目の受信Ａでデータ受信し、後半は第１図に等しい
。FIG. 3 shows an example of an abnormal transmission in which the transmission interval on the transmitting side is shifted and a timeout occurs during reception A on the receiving side, and the data is received at most on the third reception A, and the latter half is the same as in FIG. 1.
なお、データ伝送定間隔がデータ伝送時間の５倍以外の
場合にも本発明を適用し得る。データ伝送定間隔をデー
タ伝送時間のＮ倍とした場合は、Ｎは４以上とし、デー
タ伝送定間隔のＮ分のＮ１を受信タイムアウト時間とす
る固定長の受信Ａと、データ伝送定間隔のＮ分の２を受
信タイムアウト時間とする固定長の受信Ｂを備えるよう
にすることができる。Note that the present invention can be applied to cases where the data transmission regular interval is other than five times the data transmission time. When the data transmission regular interval is N times the data transmission time, N is 4 or more, and the fixed length reception A is set to N1 of the data transmission regular interval as the reception timeout time, and the data transmission regular interval is N. It is possible to provide a fixed length reception B with a reception timeout time of 2/2.
以上説明したように、本伝送方式では２種類の受信タイ
ムアウト時間をもつ固定長の受信を採用したので、固定
長のデータの内容は任意のコードを使用でき、又データ
受信検出はデータ伝送完了より遅れることはない。As explained above, this transmission method uses fixed-length reception with two types of reception timeout times, so any code can be used for the fixed-length data content, and data reception can be detected from the completion of data transmission. Never be late.
回復しない例を示す図である。It is a figure which shows the example which does not recover.
Claims (1)
伝送定間隔のＮ分のＮ−１を受信タイムアウト時間とす
る固定長の受信Ａと、データ伝送定間隔のＮ分の２を受
信タイムアウト時間とする固定長の受信Ｂとを備え、Ｎ
を４以上とし、前記受信ＡまたはＢでタイムアウトとな
れば次に前記受信Ａを行い、前記受信ＡまたはＢでデー
タ受信すれば次に前記受信Ｂを行うことを特徴とする定
間隔短固定長データ伝送方式。A fixed length reception A where the data transmission regular interval is N times the data transmission time, N-1 of the data transmission regular interval is the reception timeout time, and the reception timeout time is 2/N of the data transmission regular interval. with a fixed length reception B, and N
is 4 or more, and if a timeout occurs in the reception A or B, the reception A is performed next, and if data is received by the reception A or B, the reception B is performed next. Data transmission method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2233711A JP2969868B2 (en) | 1990-09-04 | 1990-09-04 | Fixed interval short fixed length data transmission method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2233711A JP2969868B2 (en) | 1990-09-04 | 1990-09-04 | Fixed interval short fixed length data transmission method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04113749A true JPH04113749A (en) | 1992-04-15 |
| JP2969868B2 JP2969868B2 (en) | 1999-11-02 |
Family
ID=16959359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2233711A Expired - Fee Related JP2969868B2 (en) | 1990-09-04 | 1990-09-04 | Fixed interval short fixed length data transmission method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2969868B2 (en) |
-
1990
- 1990-09-04 JP JP2233711A patent/JP2969868B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2969868B2 (en) | 1999-11-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |