JPH05110542A - Data transmission system - Google Patents
Data transmission systemInfo
- Publication number
- JPH05110542A JPH05110542A JP3266684A JP26668491A JPH05110542A JP H05110542 A JPH05110542 A JP H05110542A JP 3266684 A JP3266684 A JP 3266684A JP 26668491 A JP26668491 A JP 26668491A JP H05110542 A JPH05110542 A JP H05110542A
- Authority
- JP
- Japan
- Prior art keywords
- data
- case
- transmitted
- signal
- retransmitted
- 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 title claims abstract description 20
- 238000012790 confirmation Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 13
- 230000003111 delayed effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Communication Control (AREA)
- Selective Calling Equipment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、データ伝送方式に関
し、特に電力の監視制御システムに使用されるパケット
方式によるデータ伝送方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission system, and more particularly to a packet-based data transmission system used in a power supervisory control system.
【０００２】[0002]
【従来の技術】従来、この種のデータ伝送方式はデータ
の発生の都度、即ちデータが変化した時に変化したデー
タを伝送しており、この時に受信側よりの受信確認信号
の到着をもって着信を確認しデータの伝送を完結してい
る。この受信確認信号がある定められた確認時間（以下
ＡＣＫ＝Ａｃｋｎｏｕｌｅｄｇｅタイムと称する）以内
に到着しなかった場合はデータを再送するが、このＡＣ
Ｋタイム中にデータの再度の変化がなかった場合はその
まま再送するが、ＡＣＫタイム中にデータに再度の変化
があった場合は前のデータを再送しこの後で再度変化後
のデータを伝送するか或は再度変化後のデータのみを伝
送している。尚、データ伝送方式としては上述した方式
以外に定周期で全データを伝送する方式もある。2. Description of the Related Art Conventionally, this type of data transmission system transmits the changed data each time the data is generated, that is, when the data is changed. At this time, the incoming call is confirmed by the arrival of a reception confirmation signal from the receiving side. The data transmission has been completed. If this reception confirmation signal does not arrive within a certain confirmation time (hereinafter referred to as ACK = Acknowledge time), the data is retransmitted.
If the data does not change again during the K time, the data is retransmitted as it is. If the data changes again during the ACK time, the previous data is retransmitted and the data after the change is transmitted again. Alternatively, only the changed data is transmitted again. Incidentally, as a data transmission method, there is also a method of transmitting all data in a fixed cycle other than the above-mentioned method.
【０００３】[0003]
【発明が解決しようとする課題】このように従来例にお
いては、ＡＣＫタイムアウト時にデータに再度の変化が
あった場合、前のデータを再送した後に再度変化後のデ
ータを送信しているので、データが連続して変化する場
合は伝送タイミングが遅れてしまうという問題がある。
又再度変化後のデータのみを送信する方式も受信側にお
いて再度変化後のデータであるという識別が難かしくな
り処理に時間がかかるという問題がある。As described above, in the conventional example, when the data changes again at the time of ACK timeout, the data after the change is transmitted again after the previous data is retransmitted. However, there is a problem that the transmission timing will be delayed if is continuously changed.
Further, in the method of transmitting only the changed data again, it is difficult for the receiving side to identify the changed data again, and there is a problem that the processing takes time.
【０００４】[0004]
【課題を解決するための手段】本発明のデータ伝送方式
はデータが変化した時に変化後のデータを送信しある定
められた確認時間以内に受信側より発っせられる受信確
認信号の到着があった場合は前記データの送信を完結
し、前記受信確認信号の到着がなくかつ前記データに再
度の変化がなかった第１の場合は前記データを再送し、
前記受信確認信号の到着がなく前記データに再度の変化
があった第２の場合は前記データを再送しその後で再度
変化後のデータを送信するパケット方式によるデータ伝
送方式において、前記第１の場合は前記データと識別信
号とを同一パケットで再送し、前記第２の場合は前記デ
ータと前記再度変化後のデータと前記識別信号とを同一
パケットで送信する。According to the data transmission method of the present invention, when the data changes, the changed data is transmitted, and a reception confirmation signal is sent from the receiving side within a predetermined confirmation time. In the case, the transmission of the data is completed, and in the first case in which the reception confirmation signal has not arrived and the data has not changed again, the data is retransmitted,
In the second case in which the reception confirmation signal has not arrived and the data has changed again, in the first case in the packet transmission data transmission method in which the data is retransmitted and then the changed data is transmitted again. Retransmits the data and the identification signal in the same packet, and in the second case, transmits the data, the changed data and the identification signal in the same packet.
【０００５】[0005]
【実施例】次に本発明の一実施例について図を参照して
説明する。図１は本実施例の信号送受信手順を示すシー
ケンスである。図２は本実施例の送信信号の伝送フォー
マットを示す構成図である。図１において、データ１が
発生した場合、受信側装置にこのデータ１を伝送し、Ａ
ＣＫ信号を受信したため正常に終了する。次にデータ２
が発生したため、受信側装置にデータ２を伝送したが、
ＡＣＫ信号が受信できず再送を行った。このとき、デー
タ２は再度の変化が発生していないため、パケットの識
別ビットは“０”として再送する。受信側装置は、識別
ビットの“０”を識別してデータ２に対する処理を行
う。Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sequence showing a signal transmission / reception procedure of this embodiment. FIG. 2 is a block diagram showing the transmission format of the transmission signal of this embodiment. In FIG. 1, when data 1 is generated, this data 1 is transmitted to the receiving side device, and A
Since the CK signal is received, the process ends normally. Next data 2
Occurred, so data 2 was transmitted to the receiving device,
The ACK signal could not be received and the packet was retransmitted. At this time, since the data 2 has not changed again, the identification bit of the packet is retransmitted as "0". The reception side device identifies "0" of the identification bit and processes the data 2.
【０００６】データ３が発生した場合、受信側装置にデ
ータ３を伝送したが、ＡＣＫ信号が受信できずにこのと
き、データ３は再度の変化を発生しデータ４となったの
で、パケットの識別ビットを“１”としてデータ３とデ
ータ４とを一緒にして再送する。受信側装置は、識別ビ
ットの“１”を識別して、システムに応じた処理を行
う。尚、上述した各ケースの信号の伝送フォーマットは
図２に示す通りである。When the data 3 is generated, the data 3 was transmitted to the receiving side device, but the ACK signal could not be received. At this time, the data 3 changed again and became the data 4, so that the packet identification is performed. The bit is set to "1" and the data 3 and the data 4 are retransmitted together. The receiving side device identifies "1" of the identification bit and performs processing according to the system. The transmission format of the signal in each case described above is as shown in FIG.
【０００７】[0007]
【発明の効果】以上説明したように本発明は、データを
再送する時に再送データと再度変化後のデータとを同時
に伝送しかつ識別信号を付加しているので、最新データ
の伝送タイミングが遅れることがなくなりかつ識別信号
により再送データの識別処理が早まるという効果があ
る。As described above, according to the present invention, when the data is retransmitted, the retransmitted data and the changed data are simultaneously transmitted and the identification signal is added. Therefore, the transmission timing of the latest data is delayed. And the identification signal speeds up the process of identifying retransmission data.
【図１】本発明の一実施例の信号送受信手順を示すシー
ケンスである。FIG. 1 is a sequence showing a signal transmission / reception procedure of an embodiment of the present invention.
【図２】本発明の一実施例の伝送フォーマットを示す構
成図である。FIG. 2 is a configuration diagram showing a transmission format according to an embodiment of the present invention.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０４Ｑ 9/00 Ｋ 7170−5Ｋ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display location H04Q 9/00 K 7170-5K
Claims (1)
送信しある定められた確認時間以内に受信側より発っせ
られる受信確認信号の到着があった場合は前記データの
送信を完結し、前記受信確認信号の到着がなくかつ前記
データに再度の変化がなかった第１の場合は前記データ
を再送し、前記受信確認信号の到着がなく前記データに
再度の変化があった第２の場合は前記データを再送しそ
の後で再度変化後のデータを送信するパケット方式によ
るデータ伝送方式において、 前記第１の場合は前記データと識別信号とを同一パケッ
トで再送し、前記第２の場合は前記データと前記再度変
化後のデータと前記識別信号とを同一パケットで送信す
ることを特徴とするデータ伝送方式。1. When the data changes, the changed data is transmitted, and when a reception confirmation signal sent from the receiving side arrives within a certain confirmation time, the transmission of the data is completed, and In the first case where the reception confirmation signal does not arrive and the data has not changed again, the data is retransmitted, and in the second case where the reception confirmation signal has not arrived and the data has changed again. In a data transmission method by a packet method in which the data is retransmitted and then the changed data is transmitted again, in the first case, the data and an identification signal are retransmitted in the same packet, and in the second case, the data And the data after the change and the identification signal are transmitted in the same packet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3266684A JPH05110542A (en) | 1991-10-16 | 1991-10-16 | Data transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3266684A JPH05110542A (en) | 1991-10-16 | 1991-10-16 | Data transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05110542A true JPH05110542A (en) | 1993-04-30 |
Family
ID=17434261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3266684A Pending JPH05110542A (en) | 1991-10-16 | 1991-10-16 | Data transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05110542A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0799692A (en) * | 1993-09-28 | 1995-04-11 | Nec Corp | Data monitoring and controlling device |
| US6092109A (en) * | 1997-06-30 | 2000-07-18 | Nec Corporation | Information matching system and its matching method for matching information between terminal equipment connected via network |
| JP2006087124A (en) * | 2004-09-16 | 2006-03-30 | Internatl Business Mach Corp <Ibm> | Envelope packet architecture for broadband engine |
| JP2009112016A (en) * | 1997-11-13 | 2009-05-21 | Qualcomm Inc | Method and apparatus for time efficient retransmission using symbol accumulation |
| JP2012249647A (en) * | 2011-05-31 | 2012-12-20 | Sankyo Co Ltd | Game machine |
-
1991
- 1991-10-16 JP JP3266684A patent/JPH05110542A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0799692A (en) * | 1993-09-28 | 1995-04-11 | Nec Corp | Data monitoring and controlling device |
| US6092109A (en) * | 1997-06-30 | 2000-07-18 | Nec Corporation | Information matching system and its matching method for matching information between terminal equipment connected via network |
| JP2009112016A (en) * | 1997-11-13 | 2009-05-21 | Qualcomm Inc | Method and apparatus for time efficient retransmission using symbol accumulation |
| US8438447B2 (en) | 1997-11-13 | 2013-05-07 | Qualcomm Incorporated | Method and apparatus for time efficient retransmission using symbol accumulation |
| JP2006087124A (en) * | 2004-09-16 | 2006-03-30 | Internatl Business Mach Corp <Ibm> | Envelope packet architecture for broadband engine |
| US7975064B2 (en) | 2004-09-16 | 2011-07-05 | International Business Machines Corporation | Envelope packet architecture for broadband engine |
| JP2012249647A (en) * | 2011-05-31 | 2012-12-20 | Sankyo Co Ltd | Game machine |
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