JPS5840943A - Error recovering system of missing data - Google Patents
Error recovering system of missing dataInfo
- Publication number
- JPS5840943A JPS5840943A JP56139139A JP13913981A JPS5840943A JP S5840943 A JPS5840943 A JP S5840943A JP 56139139 A JP56139139 A JP 56139139A JP 13913981 A JP13913981 A JP 13913981A JP S5840943 A JPS5840943 A JP S5840943A
- Authority
- JP
- Japan
- Prior art keywords
- data
- data communication
- communication device
- missing
- lost
- 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
- 238000004891 communication Methods 0.000 claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000011084 recovery Methods 0.000 claims description 9
- 238000012790 confirmation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 244000007853 Sarothamnus scoparius Species 0.000 claims 1
- 206010068829 Overconfidence Diseases 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 108010076504 Protein Sorting Signals Proteins 0.000 description 4
- 241000270730 Alligator mississippiensis Species 0.000 description 1
- 235000009419 Fagopyrum esculentum Nutrition 0.000 description 1
- 240000008620 Fagopyrum esculentum Species 0.000 description 1
- 101000671676 Homo sapiens U3 small nucleolar RNA-associated protein 4 homolog Proteins 0.000 description 1
- 102100040072 U3 small nucleolar RNA-associated protein 4 homolog Human genes 0.000 description 1
- 241000981595 Zoysia japonica Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 210000001215 vagina Anatomy 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1874—Buffer management
- H04L1/1877—Buffer management for semi-reliable protocols, e.g. for less sensitive applications like streaming video
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Communication Control (AREA)
Abstract
Description
【発明の詳細な説明】
本尭明は、データ通信システムにおいて、データ通信装
置と中継装置との閾でのデータ紛失を１０−カルに回復
し、中継Ｍ置関の転送データ畝の削減、連か１ｋＩ１１
４１會夷構する−）−傭方式ＶＣ関する０
複数のデータ過信装置と、データ過１ｉ義置閾をａｍす
為−偏以上の中ａｉａ置とから構成され為ブール過信Ｖ
ヌテＡＫて、端末から電文を一定長以下に分割し、宛先
情報中綱内制御情＠會有するへｙ／を付与１れ丸パケッ
）１用い、電文を過信す１際、データ送出のつど着側か
ら０ＡＯＫ信号管得て、データ伝送を行って−るＯ
ｊｌＩｌｗＪはデーメ過僅シヌテムＯ構成１ｉｌｌ’を
示す０ｊ１１Ｅにて、ｌ＃１ｊｌｌデータ過１秦置、３
１．３ｊｌは中ＭＡＬ ｘはＭ２デーＩ過信装置を示す
。伝送される情報内容はへｖｌｌｊ８（６）およびデー
１１ムＣＫ。DETAILED DESCRIPTION OF THE INVENTION In a data communication system, the present invention recovers data lost at the threshold between a data communication device and a relay device to 10-cal, reduces the transfer data ridges of the relay M location, and improves the connection. or 1kI11
41 Constructing -) - Concerning a private method VC - It is composed of a plurality of data overconfidence devices and a data overconfidence threshold - an aia position of more than bias, and a Boolean overconfidence V
With Nute AK, divide the message from the terminal into pieces of a certain length or less, add y/ to the destination information, internal control information, and add y/ to the destination information. OjlIlwJ obtained 0AOK signal tube from the side and performs data transmission.
1.3jl indicates medium MAL x indicates M2day I overconfidence device. The information content to be transmitted is to vllj8 (6) and dame 11 CK.
ＮＡＩＣ情報ＯｐイグｆＲ示１１（Ｔ））よび、データ
部（ＤＡＴム）で構虞電れ、発側のデーＩ過ａ装置ｌか
６着側のデー１４信俟置２ヘデーメを送信し、着側から
ＡＣＫＩＩ号が発＊に＠透されてくる状態を示してい為
Ｏ
１ｌ！東の紛失データ部）回復方式は、落１デーメ過償
鵜置ｌかｂ１個以上Ｏ中−装置！１１． Ｈ’を経―し
て、ｌｓｘデーＩ過償鵜置装へ転送し大デーＩが、デー
タ過信装置と中１１１Ｍ置との間で紛失した場合、再度
、紛失データを、第１データ通信装置１から、中継装置
３１．３２を経由して第２ゲータ通信装置２へ、転送す
ることにより船出データの回復を行りている。従フて、
データ紛失時中継装置３１，３２間の転送データ数が増
大し、嘔らに再送時毎に転送遷延時間が生じ、誤り回復
時間が大であるという欠点がある０
本発明の目的は、データ通信システムにおけるデータ過
信装置と中継装置との間のデータ紛失ｔ１−−カルに回
復し、データ紛失時の中ｍｍ置関の転送データ数を減ら
すことによ・シ紛失データに対する能率的なり４力回復
方式を提供することにある。NAIC information (optional information 11 (T)) and the data section (DAT) send a message to the originating side's data I/A device 1 or 6 and the destination side's data 14 transmission 2; This shows that the ACKII is being transmitted from the receiving side to the outgoing * so O 1l! East's lost data section) The recovery method is to drop 1 deme, overcompensation, or b1 or more O-device! 11. If the large data I is transferred to the lsx data I overcompensation device via H' and is lost between the data overtransfer device and the middle 111M device, the lost data is transferred again to the first data communication device 1 to the second Gator communication device 2 via the relay devices 31 and 32, the sailing data is recovered. Following,
In the event of data loss, the number of data transferred between the relay devices 31 and 32 increases, a transfer delay time occurs each time a data is retransmitted, and error recovery time becomes long. Data loss between the data overconfidence device and the relay device in the system can be recovered quickly, and by reducing the number of data transferred between the middle and middle positions when data is lost, efficient recovery from lost data can be achieved. The purpose is to provide a method.
本発明は、データ通信装置間で、データ紛失が生じ友場
合、送達確認が成立するか、再送回数が−ｉ回数以上と
なる盲で社、同一データが再送されることに着目し、第
１データ通信装置から中継装置を経由して、＄２２デー
タ信装置へ転送されたデータが、データ通信装置と中継
装置との間で紛失し九時点で、中継装置間はデータの紛
失のみ通知し、以後中継装置は、第１データ通信鋏置か
らの再送データに対しては、該嬉ｌデータ過信装置へデ
ータ紛失を報告し％ＪＩＩ２データ通信装置には、紛失
データを再送することで、紛失データの−り回復を可＊
！ＩＫするものである。The present invention focuses on the fact that when data is lost between data communication devices, the same data is retransmitted blindly when delivery confirmation is established or the number of retransmissions is -i times or more. When the data transferred from the data communication device to the $22 data communication device via the relay device is lost between the data communication device and the relay device, the relay devices only notify the data loss, Thereafter, the relay device reports data loss to the data overreliance device for retransmitted data from the first data communication device, and retransmits the lost data to the %JII2 data communication device. Possible to recover *
! It is for IK.
以下本発明の実施例につき図面に従って詳細に説明する
。Embodiments of the present invention will be described in detail below with reference to the drawings.
第２図は本発明に係る紛失データの誤り回復方式を＊′
ｆ７ｊ４する上での中継装置３１．３２の具体的実施例
であ夛、嬉３ｇは中継装置３２と第２データ通（ＩＩ！
！置２装間でデータ紛失となった場合の信号シーケンス
の一例を示す図である。Figure 2 shows the error recovery method for lost data according to the present invention*'
This is a specific embodiment of the relay devices 31 and 32 in F7J4, and the 3G is the relay device 32 and the second data communication (II!
! FIG. 2 is a diagram showing an example of a signal sequence when data is lost between two devices.
第２図において、３１．３２ｔｉ第１ＩＩにて示された
中ｍ！ｌＫ置を示し、それぞれ信号受信部、４１，４７
および４８．５Ｂ、信号送信部４３．４５および５１゜
５３を有している・４２．５０はゲート部を示し、デわ
れない。４４．５２ｔ；を繰返し情報送出部を示し、デ
ータ紛失が検出されえ場合、第１および第２データ通償
ｉ！Ｉ置と中ｓｉｎ置との閏で四−カルに紛失デーＩＯ
再送を行なうものである。４６．５４は信号判定部であ
〕、受信信号がＡＣＫ信号かＮＡＫ信Ｉ紛失検出後の再
送情報として該データ蓄積部４９から繰返し情報送出部
５２経由で第２データ通信装置に対しデータを繰返して
ローカルに送出する。In FIG. 2, the middle m! shown in 31.32ti No. 1II! 1K position, signal receiving section, 41, 47, respectively.
and 48.5B, signal transmitting sections 43.45 and 51.degree. 53. 42.50 indicates a gate section and is not shown. 44.52t; is repeatedly shown in the information sending unit, and if data loss is detected, the first and second data compensation i! Lost data IO in 4-cal with leap between I position and middle sin position
This is to perform retransmission. 46.54 is a signal determination unit], which repeats data from the data storage unit 49 to the second data communication device via the repetition information transmission unit 52 as retransmission information after detecting whether the received signal is an ACK signal or NAK signal I loss. and send it locally.
以下、本装置の動作をＩＩｓ図の信号クーケンス図に従
９て願に説明する口
膜ｓ＃！Ｊは、中継装置８２と第２デーメ通信装置！！
Ｏ間でデータ紛失となった場合の信号シーケンスの一例
を示す図である。Hereinafter, the operation of this device will be explained in accordance with the signal sequence diagram of Diagram IIs. J is the relay device 82 and the second communication device! !
FIG. 6 is a diagram illustrating an example of a signal sequence when data is lost between O and O;
ＩＥＩデータ過信過信装置中継＊ｔｓｘにデーター）を
送信すみ。データ（−を受信した中継装置３１は、ダー
トｓ４２が開かれているので！１！２データ過信装Ｒ２
を収容する中継−置３ｇに、データー）を転送し、中継
装置３２は、ゲート部５０が開かれてお１データ（ｍｌ
を、第２データ通信装置２に送信する。こＯ祿データ紛
失が発生すると、爵２デーｐ通信装置３は、デー／−）
の受信ができなＩ／Ｔｈ７ｔめ、ムＣＫ信号を返すこと
名できず中継装置３２はタイ４フ１回路５６によル一定
タイ々ング後応答要求信号（ＢＮＱ）を送信す為。その
結果データ紛失報告（ＮＡＫ）を応答すみ。IEI data overconfidence overconfidence device relay *Send data to tsx). Since the relay device 31 that received the data (- has opened the dart s42!1!2 data overconfidence R2
The relay device 32 transfers one data (ml) to the relay device 3g that accommodates the
is transmitted to the second data communication device 2. If data loss occurs, the data communication device 3 will lose data/-)
Since the I/Th7t cannot receive the ACK signal, the relay device 32 transmits a response request signal (BNQ) after a certain timing through the tie 4/f 1 circuit 56 since it cannot return the CK signal. As a result, we responded with a data loss report (NAK).
中継装置３２は信号判定部５４にてＮＡＫ信号判定後ゲ
ート部５０を遮断し、繰返し情報送出部５２を起動すゐ
とともにデータ葎）送信に対する最初のデータ紛失報告
ＮＡＫを、第１データ通信装置１を収容する中継装置３
１に転送し、中継装置８１Ｆｉ、信号判定部４６にてＮ
ＡＫ信号判定後ゲート部４２を遮断し、繰返し情報送出
部４４を起動しデータ紛失報告（ＮＡＫ）を第１デーメ
通信装置（１）に送信すみ。After determining the NAK signal in the signal determining unit 54, the relay device 32 shuts off the gate unit 50, repeatedly activates the information transmitting unit 52, and sends the first data loss report NAK for data transmission to the first data communication device 1. Relay device 3 that accommodates
1, and the relay device 81Fi transmits the signal to N at the signal determination unit 46.
After determining the AK signal, the gate section 42 is shut off, the repeating information sending section 44 is activated, and a data loss report (NAK) is sent to the first digital communication device (1).
この時点で、中継装置８１．３２はデータ紛失中秋膣を
設定し、以後中継装置３１Ｆｉ第１デ一タ通信装置ｌか
もデータ（−の受信にて、グー）ＩＢｔ２が履断される
九めデータ（−をｍ集し、データ紛失報告（ＮＡＫ）を
繰返し情報逸出部４４かも第１データ通信装ｆｉｌｌに
送信する。中継装置３２は、繰返し情報送出部５２から
１１２データ通信装置２ヘア’−１ｋ）ヲ、畜ら＃ｃｌ
！：ＮＱ信号を送信し、８２デ一！通信装置２からデー
タ紛失報告ＮＡＫ受信にて、第８データ通信装置２ヘデ
ータ（１１）およびＥＮＱ信号の送信を繰返す・
中継装置３２が第２データ通信装置２ヘデータ□（１）
を送信し、第２データ通信装置２から送達確認報告ムＣ
Ｋを受信し九時点で中継装置１Ｈ２は、繰返し情報送出
部５２をストップし、ゲート部５０を開放状態としてデ
ータ紛失中状態を解除し、送達確認報告（ムＣＫ）を第
１データ通信装置１を収容す ゛る中継装置３１へ転送
する。送達確認報告（ＡＣＫ）を受付けた中継装置３１
は、第１データ通信装置ｌかものデータ（ロ）受信に対
する送達確認報告（ムＣＫ）を第１データ通信Ｍｔｌに
送信し、繰返し情報送出＠４４をストップし、ゲート部
４＝を開放状態としデータ紛失状態を解除す為。At this point, the relay device 81.32 sets the data loss mid-autumn vagina, and from then on, the relay device 31Fi first data communication device l may receive the data (-). (-), and repeatedly sends a data loss report (NAK) to the first data communication device fill. 1k) Oh, damn it #cl
! : Send NQ signal, 82 de-1! Upon receiving the data loss report NAK from the communication device 2, repeat the transmission of data (11) and ENQ signal to the 8th data communication device 2. - The relay device 32 sends the data □ (1) to the 2nd data communication device 2.
and sends a delivery confirmation report from the second data communication device 2.
At the 9th point in time after receiving K, the relay device 1H2 repeatedly stops the information sending section 52, opens the gate section 50 to release the data loss state, and transmits the delivery confirmation report (MuCK) to the first data communication device 1. The data is transferred to the relay device 31 that accommodates the data. Relay device 31 that received the delivery confirmation report (ACK)
transmits a delivery confirmation report (MUCK) in response to the reception of the data (b) from the first data communication device l to the first data communication Mtl, stops the repeated information transmission @44, and sets the gate section 4 to an open state. To release data loss status.
以上により、紛失データを、中ｉｓ装置３１．３２間で
再送しないｖ４〕回復逃埋が実現される。As described above, v4] recovery/missing is realized in which lost data is not retransmitted between the intermediate IS devices 31 and 32.
以上説明し友ごとく、本発明によればデータ過信システ
ムにおいて、紛失データを中継装置間で転送せずに、誤
シ回復が可能となるため中継装置間の転送データ数の削
減、速やかな紛失データ誤り回復が実現される。As explained above, according to the present invention, in a data overconfidence system, error recovery is possible without transferring lost data between relay devices, so the number of data transferred between relay devices can be reduced, and lost data can be quickly recovered. Error recovery is achieved.
第１５１１は本発明を適用するデータ通信システムの全
体構成図、篤２図は本発明に係る紛失データの誤力回復
方式Ｏ実施例のプ四ツク線図、第３図は本発明の動作原
理を説明するための信号シーケンス図をそれぞれ示す。
図にお＾て、１は第１データ通信装置、２は第２データ
通信装置４１．４７．４８．５ｇは信号受信部、４３．
４５．５１．５３は信号送信部、！Ｊ２．５０はゲート
部、４４．５２ は繰返し情報送出部、４６．５４ ＃
ｉ信号判定部、５６はタイ建ング回路を示す。
／ Ｊｆ ３２
２蕎 ３ 口
第１頁の続き
号
■出 願 人 日本電気株式会社
東京都港区芝五丁目３３番１号
＠出 願 人 株式会社日立製作所
東京都千代田区丸の内−丁目５
番１号Figure 1511 is an overall configuration diagram of a data communication system to which the present invention is applied, Figure 2 is a four-way diagram of an embodiment of the error recovery method for lost data according to the present invention, and Figure 3 is the operating principle of the present invention. 1 and 2 show signal sequence diagrams for explaining the following. In the figure, 1 is a first data communication device, 2 is a second data communication device 41.47.48.5g is a signal receiving section, 43.
45.51.53 is the signal transmitter,! J2.50 is the gate section, 44.52 is the repeat information sending section, 46.54 #
The i signal determination section 56 indicates a tie construction circuit. / Jf 32
2 Soba 3 mouths Continuation of the first page ■Applicant NEC Corporation 5-33-1 Shiba, Minato-ku, Tokyo @ Applicant Hitachi Ltd. 5-1 Marunouchi-chome, Chiyoda-ku, Tokyo
Claims (1)
る１ｍ以上の中−一瀘とから構成されるデータ通信シス
テムにおいて、第ｌデータ」１６公置から、１個以上の
中継装置を経由して、第２データ通値装瀘へ転送された
データが、データ過信装置と中継装置との閾で為紛失し
九状膳を検知する手段と、紛失データの送趨確認が成立
丁４時点まで、箒ｌおよび第２データ通ｍａｔと中継装
置との閏で、ローカルに紛失データの再送を行う手段を
有することを特徴とする誤９回復方式０In a data communication system consisting of a plurality of data communication devices and a medium-sized cable of 1 m or more that is connected to the data communication station 1, data is transmitted from the 1st data station via one or more relay devices. Then, the data transferred to the second data transfer device is lost due to the threshold between the data overload device and the relay device, and a means to detect the data transfer and confirmation of the transmission trend of the lost data are established. Error 9 recovery method 0 characterized in that it has means for locally retransmitting lost data by connecting the broom, the second data communication mat, and the relay device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56139139A JPS5840943A (en) | 1981-09-03 | 1981-09-03 | Error recovering system of missing data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56139139A JPS5840943A (en) | 1981-09-03 | 1981-09-03 | Error recovering system of missing data |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5840943A true JPS5840943A (en) | 1983-03-10 |
Family
ID=15238449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56139139A Pending JPS5840943A (en) | 1981-09-03 | 1981-09-03 | Error recovering system of missing data |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5840943A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5249709A (en) * | 1975-10-17 | 1977-04-21 | Nederlanden Staat | System for controlling error and phase of interconnection arq circuit |
-
1981
- 1981-09-03 JP JP56139139A patent/JPS5840943A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5249709A (en) * | 1975-10-17 | 1977-04-21 | Nederlanden Staat | System for controlling error and phase of interconnection arq circuit |
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