JPH0344129A - Data error recovery system in network system - Google Patents

Data error recovery system in network system

Info

Publication number
JPH0344129A
JPH0344129A JP1179338A JP17933889A JPH0344129A JP H0344129 A JPH0344129 A JP H0344129A JP 1179338 A JP1179338 A JP 1179338A JP 17933889 A JP17933889 A JP 17933889A JP H0344129 A JPH0344129 A JP H0344129A
Authority
JP
Japan
Prior art keywords
frame
error
block
data
frames
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
JP1179338A
Other languages
Japanese (ja)
Inventor
Tsuyoshi Matsunaga
松永　強志
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.)
NEC Solution Innovators Ltd
Original Assignee
NEC Software Kyushu 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 NEC Software Kyushu Ltd filed Critical NEC Software Kyushu Ltd
Priority to JP1179338A priority Critical patent/JPH0344129A/en
Publication of JPH0344129A publication Critical patent/JPH0344129A/en
Pending legal-status Critical Current

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  • Detection And Prevention Of Errors In Transmission (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To efficiently smooth the transmission reception of a data frame between terminal equipments at a high speed by detecting a transmission reception error of a frame at a transport level and applying recovery processing altogether for each message block. CONSTITUTION:A sender side sends one block of frames N1, N2,...N5 (in this case, referred to as outstanding 5) continuously. However, when the frame N2 is missing on the way or reception is failed through the production of an error, the receiver side detects the error, the retransmission is not immediately made, and when the final frame N5 of one block is received, a retransmission request replay A2 incorporated with the information of the frame number whose error is detected is sent. Then the sender side receiving the retransmission request reply A2 starts the transmission of a data block comprising frames N2, N6,...N9 including the frame N2. Thus, the data frame is sent or received smoothly at a fast speed.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はローカルエリアネットワーク上における各端末
のネットワークソフトウェア（トランスポートレベルの
データ転送制御）でのデータフレームの送受信を円滑に
行うためのデータ転送制御に関するネットワークデータ
エラー回復方式である。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to data transfer for smoothly transmitting and receiving data frames using network software (transport level data transfer control) of each terminal on a local area network. This is a network data error recovery method for control.

〔従来の技術〕[Conventional technology]

従来、ネットワークシステム上のトランスボートソフト
ウェアレベルでのデータフレームの送受信においては、
メツセージをいくつかに分割してアウトスタンデイグ数
のフレームから成るブロックごとに連続的にフレームＮ
（１）〜Ｎ（５）。Conventionally, when transmitting and receiving data frames at the transport software level on a network system,
The message is divided into several parts, and each block consisting of an outstanding number of frames is consecutively divided into N frames.
(1) to N(5).

Ｎ（６）〜Ｎ（１０）の送受信を待っている。第２図は
従来のネットワークシステムにおけるデータエラー回復
方式について説明している。そして、受信側でフレーム
のエラーを検出した場合、ただちに受信側からの再送要
求Ｅ（２）に対して、送信側はエラーが発生したフレー
ムの送信を行っている。これによって転送誤りを防止し
ている。Waiting for transmission/reception of N(6) to N(10). FIG. 2 describes a data error recovery method in a conventional network system. When a frame error is detected on the receiving side, the transmitting side immediately transmits the frame in which the error occurred in response to a retransmission request E(2) from the receiving side. This prevents transfer errors.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来のネットワークシステムにおけるデータエ
ラー回復方式では、受信側でデータエラ−を検出した時
点でただちに送信側に対して再送要求を送信する。In the data error recovery method in the conventional network system described above, when a data error is detected on the receiving side, a retransmission request is immediately sent to the transmitting side.

しかし、送信側では再送要求を得は取るまでの間のフレ
ームは正常な送信を続けるため、エラーが頻発すると無
駄なフレームを何度も再送し、転送処理効率が著しく低
下するという欠点がある。However, on the transmitting side, frames continue to be transmitted normally until a retransmission request is received, so if errors occur frequently, useless frames are retransmitted many times, resulting in a significant drop in transfer processing efficiency.

〔課題を解決するための手段〕[Means to solve the problem]

本発明のネットワークシステムにおけるデータエラー回
復方式は、ローカルエリアネットワークシステム上にお
けるネットワークソフトウェアのトランスポートレベル
でのデータフレーム送信の際、受信側でエラーの生じた
フレームを検出した場合に各メツセージブロックごとに
エラー回復のためのフレーム再送を最初に行って構成さ
れる。The data error recovery method in the network system of the present invention is such that when a data frame is transmitted at the transport level of network software on a local area network system, when an error frame is detected on the receiving side, It consists of first retransmitting frames for error recovery.

〔実施例〕〔Example〕

本発明を第１図に基づき説明する。 The present invention will be explained based on FIG.

送信側はフレームの１ブロツクＮ（１）　、　Ｎ（２）
、・・・・・・Ｎ（５）（この場合は、アウトスタンデ
ィングが５であるという）を連続的に送信する。しかし
、フレームＮ（２）が途中で消失、または何らかのエラ
ーが発生して受信に失敗した場合を考える。このとき受
信側ではエラー検出後、すぐには再送要求を行わないで
、１ブロツクの最後のフレームＮ（５〉を受信したとき
にエラー検出したフレーム番号の情報を入れた再送要求
応答Ａ（２）を送信する。The sending side sends one block of frames N(1), N(2)
, . . . N(5) (in this case, the outstanding is 5) are continuously transmitted. However, consider a case where frame N(2) disappears midway or some error occurs and reception fails. At this time, the receiving side does not issue a retransmission request immediately after detecting an error, but instead sends a retransmission request response A (2 ) to send.

すると、再送要求応答Ａ（２〉を受信した送信側はフレ
ームＮ〈２〉を含めた次のフレームから成るデータブロ
ックＮ（２）　、　Ｎ（６）　、・・・・・・Ｎ（９）
の送信を開始する。Then, the transmitting side that received the retransmission request response A(2) sends data blocks N(2), N(6),...N(9) consisting of the next frame including frame N(2).
Start sending.

この方法によって各ブロック単位にエラー回復処理を行
い、連続送信、受信の中断をなくし、データフレーム転
送を円滑かつ高速に送受信を行うことができる。This method performs error recovery processing on a block-by-block basis, eliminates interruptions in continuous transmission and reception, and allows smooth and high-speed data frame transfer.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、トランスポートレベルで
のフレームの送受信の誤りの検出とその回復処理を各メ
ツセージブロックごとに一括して行うことにより、フレ
ーム連続送信途中での再送処理をなくし、これによって
各端末間のデータフレームを送受信をスムーズにし、か
つ高速で効率よく行うことができるという効果がある。As explained above, the present invention eliminates retransmission processing during continuous frame transmission by detecting frame transmission/reception errors at the transport level and performing recovery processing for each message block at once. This has the effect of making it possible to smoothly send and receive data frames between each terminal, and to do so at high speed and efficiently.

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

第１図は本発明の一実施例の作動を示す説明図、第２図
は従来の技術によるネットワークシステムのエラー回復
方式の作動を示す説明図である。 Ｎ　（ｎ　）−−−−−−フレーム、Ａ（ｍ）−Ｅ（ｉ
）−・・・・再送要求応答、ｉ−ｍ−ｎ・・・・・・フ
レーム番号、ＥＯＴ・・・・・・転送終了。FIG. 1 is an explanatory diagram showing the operation of an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the operation of a conventional error recovery method for a network system. N (n)------frame, A(m)-E(i
)--Resend request response, im-n... Frame number, EOT... End of transfer.

Claims (1)

【特許請求の範囲】[Claims] 　ローカルエリアネットワークシステム上におけるネッ
トワークソフトウェアのトランスポートレベルでのデー
タフレーム送信の際、受信側でエラーの生じたフレーム
を検出した場合に各メッセージブロックごとにエラー回
復のためのフレーム再送を最初に行つて成ることを特徴
とするネットワークシステムにおけるデータエラー回復
方式。When transmitting data frames at the transport level of network software on a local area network system, if the receiving side detects a frame with an error, it first retransmits the frame for error recovery for each message block. A data error recovery method in a network system characterized by:
JP1179338A 1989-07-11 1989-07-11 Data error recovery system in network system Pending JPH0344129A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1179338A JPH0344129A (en) 1989-07-11 1989-07-11 Data error recovery system in network system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1179338A JPH0344129A (en) 1989-07-11 1989-07-11 Data error recovery system in network system

Publications (1)

Publication Number Publication Date
JPH0344129A true JPH0344129A (en) 1991-02-26

Family

ID=16064093

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1179338A Pending JPH0344129A (en) 1989-07-11 1989-07-11 Data error recovery system in network system

Country Status (1)

Country Link
JP (1) JPH0344129A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06223015A (en) * 1993-01-27 1994-08-12 Nec Corp Information processor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06223015A (en) * 1993-01-27 1994-08-12 Nec Corp Information processor

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