DE102004055684A1 - Process for safe data transfer in a secure network comprises having an identical format construction in each data frame - Google Patents

Process for safe data transfer in a secure network comprises having an identical format construction in each data frame Download PDF

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Publication number
DE102004055684A1
DE102004055684A1 DE200410055684 DE102004055684A DE102004055684A1 DE 102004055684 A1 DE102004055684 A1 DE 102004055684A1 DE 200410055684 DE200410055684 DE 200410055684 DE 102004055684 A DE102004055684 A DE 102004055684A DE 102004055684 A1 DE102004055684 A1 DE 102004055684A1
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Germany
Prior art keywords
crc
data frame
data
secure network
data transfer
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.)
Withdrawn
Application number
DE200410055684
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German (de)
Inventor
Bernhard Sauer
Guido Dr. Beckmann
Franz Kaufleitner
Volker Sasse
Peter Dr. Wratil
Michael Kievit
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.)
B&R Industrial Automation GmbH
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INNOTEC GmbH
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Publication date
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Priority to DE200410055684 priority Critical patent/DE102004055684A1/en
Publication of DE102004055684A1 publication Critical patent/DE102004055684A1/en
Withdrawn legal-status Critical Current

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    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/09—Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Theoretical Computer Science (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Detection And Correction Of Errors (AREA)

Abstract

A process for safe data transfer in a secure network comprises having an identical format construction in each data frame. Preferably each data frame is secured with a cyclic redundancy check (CRC) of variable length.

Description

Die Erfindung betrifft ein Verfahren zur Absicherung des Datentransfers in einem sicheren Netzwerk mit CRC's variabler Länge.The The invention relates to a method for securing the data transfer in a secure network with variable length CRCs.

Beschreibung:Description:

Das Verfahren beschreibt die Absicherung des Datentransfers in einem sicheren Netzwerk, bei dem die Länge der in den einzelnen Datentelegrammen enthaltenen Prüfsumme von der ebenfalls im Datentelegramm enthaltenen Anzahl der Datenbytes abhängt.The Method describes the protection of the data transfer in one secure network where the length the checksum contained in the individual data telegrams of which also depends on the number of data bytes contained in the data telegram.

Stand der Technik:State of the art:

Die Notwendigkeit die Datenintegrität in einem sicherheitsrelevanten Kommunikationsnetzwerk (im Sinne des englischen Safety) zu garantieren ist durch technische Anforderungen für sichere Netzwerke festgelegt (FAET-Dokument: Prüfgrundsatz "Bussysteme für die sicherheitsgerichtete Übertragung" ). Entsprechend dieser Anforderung haben alle sicherheitsgerichteten Netzwerke spezielle Verfahren entwickelt, wie zum Beispiel „Cyclic Redundancy Check"-Prüfsummen (CRC) etc.The Need the data integrity in a security-relevant communication network (in the sense English safety) is due to technical requirements for safe Networks defined (FAET document: Test principle "Bus systems for safety-related transmission"). Corresponding All safety-related networks have special requirements for this requirement Developed procedures such as "Cyclic Redundancy Check" checksums (CRC) etc.

Im Interesse des Datendurchsatzes ist es das Ziel die Länge der einzelnen Datentelegramme in einem sicheren Netzwerk möglichst kurz zu halten. Bei den bekannten sicheren Netzwerken werden daher für Datentransfer mit wenigen und mit vielen Datenbytes mehrere Datenrahmentypen mit unterschiedlichem formalen Aufbau definiert. Die Auswahl des Datenrahmentyps muss hierbei durch den Programmierer der Applikationssoftware oder durch eine andere Art von Konfiguration erfolgen.in the Interest of data throughput, it is the goal the length of the individual data telegrams in a secure network if possible to keep it short. Therefore, in the known secure networks for data transfer with few and with many data bytes several data frame types with defined different formal structure. The selection of the data frame type must be done by the programmer of the application software or done by a different type of configuration.

Technische Beschreibung:Technical description:

Der Teil der Software, der die CRC erzeugt, ermittelt die Länge aus dem Datenfeld „LE" 1 des Telegrames. Danach errechnet er die notwendige CRC in Abhängigkeit von der Länge des Datentelegrams, z.B. CRC 8 bei einer Datenlänge von max. 8 Byte, und schreibt die CRC anschließend in den Datenframe.The part of the software that generates the CRC determines the length from the data field "LE" 1 of the telegram. Then it calculates the necessary CRC depending on the length of the data telegram, eg CRC 8 with a data length of max. 8 bytes, and then writes the CRC into the data frame.

Der Teil der Software, der die CRC überprüft, liest die Länge aus dem Datenframe. Danach errechnet er die in Abhängigkeit von der Länge des Datentelegams und vergleicht die errechnete CRC anschließend mit der CRC im Datentelegram.Of the Part of the software that checks the CRC reads the length from the data frame. Afterwards he calculates the in dependence of the length of the data telegram and then compares the calculated CRC with the CRC in the data telegram.

Der Vorteil dieses Verfahrens liegt darin, dass es nur einen Typ von Datenrahmen gibt und dass die Auswahl der CRC für den Applikationsprogrammierer völlig transparent durch die Software erfolgt. (1)The advantage of this method is that there is only one type of data frame and that the selection of the CRC for the application programmer is completely transparent by the software. ( 1 )

Claims (4)

Verfahren zur Absicherung des Datentransfers in einem sicheren Netzwerk, dadurch gekennzeichnet, dass jeder Datenframe einen identischen formalen Aufbau besitzt.Method for securing the data transfer in a secure network, characterized in that each data frame has an identical formal structure. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass jeder Datenframe mit einer CRC – Cyclic Redundancy Check"-Prüfsummen – variabler Länge (z.B. CRC-8 oder CRC-16) abgesichert wird.Method according to claim 1, characterized in that each data frame is tagged with a CRC - Cyclic Redundancy Check checksum of variable length (e.g. CRC-8 or CRC-16). Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die jeweils kürzestmögliche CRC benutzt wird, die zur Einhaltung der von den zugrundeliegenden Normen (z.B. IEC 61508 SIL 3) geforderten Restfehlerwahrscheinlichkeit notwendig ist.Method according to claim 1 or 2, characterized that the shortest possible CRC is used to comply with the underlying standards (e.g., IEC 61508 SIL 3) required residual error probability necessary is. Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Länge der CRC aufgrund der im Datenframe enthaltenen Längeninformation mittels vordefinierter Regeln von der Software ausgewählt wird.Method according to claim 1, 2 or 3, characterized that the length the CRC due to the length information contained in the data frame by means of predefined Rules selected by the software becomes.
DE200410055684 2004-11-18 2004-11-18 Process for safe data transfer in a secure network comprises having an identical format construction in each data frame Withdrawn DE102004055684A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200410055684 DE102004055684A1 (en) 2004-11-18 2004-11-18 Process for safe data transfer in a secure network comprises having an identical format construction in each data frame

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410055684 DE102004055684A1 (en) 2004-11-18 2004-11-18 Process for safe data transfer in a secure network comprises having an identical format construction in each data frame

Publications (1)

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DE102004055684A1 true DE102004055684A1 (en) 2006-05-24

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012136546A1 (en) * 2011-04-06 2012-10-11 Robert Bosch Gmbh Method and apparatus for adapting the data transmission security in a serial bus system
RU2597501C2 (en) * 2011-06-29 2016-09-10 Роберт Бош Гмбх Method and device for serial transmission of data with flexible size and variable bit length
RU2603534C2 (en) * 2011-06-29 2016-11-27 Роберт Бош Гмбх Method and device for serial data transmission having a flexible message size and a variable bit length
US9513988B2 (en) 2011-04-06 2016-12-06 Robert Bosch Gmbh Method and device for increasing the data transmission capacity in a serial bus system
US9825852B2 (en) 2011-04-26 2017-11-21 Robert Bosch Gmbh Method and device for serial data transmission which is adapted to memory sizes
US9864724B2 (en) 2011-06-29 2018-01-09 Robert Bosch Gmbh Method and device for serial data transmission having a flexible message size and a variable bit length

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9594626B2 (en) 2011-04-06 2017-03-14 Robert Bosch Gmbh Method and device for increasing the data transmission capacity in a serial bus system
CN103620573B (en) * 2011-04-06 2018-06-19 罗伯特·博世有限公司 For matching the method and apparatus of the data transmission security in serial bus system
CN103620573A (en) * 2011-04-06 2014-03-05 罗伯特·博世有限公司 Method and apparatus for adapting the data transmission security in a serial bus system
KR20140029431A (en) * 2011-04-06 2014-03-10 로베르트 보쉬 게엠베하 Method and apparatus for adapting the data transmission security in a serial bus system
KR20140030178A (en) * 2011-04-06 2014-03-11 로베르트 보쉬 게엠베하 Method and apparatus for adapting the data transmission security in a serial bus system
JP2014515897A (en) * 2011-04-06 2014-07-03 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング Method and apparatus for adjusting the reliability of data transmission in a serial bus system
JP2014518598A (en) * 2011-04-06 2014-07-31 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング Method and apparatus for adjusting the reliability of data transmission in a serial bus system
RU2595962C2 (en) * 2011-04-06 2016-08-27 Роберт Бош Гмбх Method and device for adaptation of reliability of data transmission in serial bus system
RU2597467C2 (en) * 2011-04-06 2016-09-10 Роберт Бош Гмбх Method and device for adaptation of reliability of data transmission in serial bus system
KR101876602B1 (en) * 2011-04-06 2018-07-09 로베르트 보쉬 게엠베하 Method and apparatus for adapting the data transmission security in a serial bus system
KR101921771B1 (en) 2011-04-06 2018-11-23 로베르트 보쉬 게엠베하 Method and apparatus for adapting the data transmission security in a serial bus system
WO2012136545A1 (en) * 2011-04-06 2012-10-11 Robert Bosch Gmbh Method and apparatus for adapting the data transmission security in a serial bus system
US9513988B2 (en) 2011-04-06 2016-12-06 Robert Bosch Gmbh Method and device for increasing the data transmission capacity in a serial bus system
US9600425B2 (en) 2011-04-06 2017-03-21 Robert Bosch Gmbh Method and device for adapting the data transmission reliability in a serial bus system
WO2012136546A1 (en) * 2011-04-06 2012-10-11 Robert Bosch Gmbh Method and apparatus for adapting the data transmission security in a serial bus system
AU2012238883B2 (en) * 2011-04-06 2017-07-27 Robert Bosch Gmbh Method and apparatus for adapting the data transmission security in a serial bus system
AU2012238884B2 (en) * 2011-04-06 2017-07-27 Robert Bosch Gmbh Method and apparatus for adapting the data transmission security in a serial bus system
US9880956B2 (en) 2011-04-06 2018-01-30 Robert Bosch Gmbh Method and apparatus for adapting the data transmission security in a serial bus system
US9825852B2 (en) 2011-04-26 2017-11-21 Robert Bosch Gmbh Method and device for serial data transmission which is adapted to memory sizes
US9852106B2 (en) 2011-06-29 2017-12-26 Robert Bosch Gmbh Method and device for serial data transmission having a flexible message size and a variable bit length
US9864724B2 (en) 2011-06-29 2018-01-09 Robert Bosch Gmbh Method and device for serial data transmission having a flexible message size and a variable bit length
US9690742B2 (en) 2011-06-29 2017-06-27 Robert Bosch Gmbh Method and device for serial data transmission having a flexible message size and a variable bit length
RU2597501C2 (en) * 2011-06-29 2016-09-10 Роберт Бош Гмбх Method and device for serial transmission of data with flexible size and variable bit length
RU2603534C2 (en) * 2011-06-29 2016-11-27 Роберт Бош Гмбх Method and device for serial data transmission having a flexible message size and a variable bit length

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