DK0458802T3 - Procedure for operating a signal technically secure multidata system - Google Patents

Procedure for operating a signal technically secure multidata system

Info

Publication number
DK0458802T3
DK0458802T3 DK90902154.5T DK90902154T DK0458802T3 DK 0458802 T3 DK0458802 T3 DK 0458802T3 DK 90902154 T DK90902154 T DK 90902154T DK 0458802 T3 DK0458802 T3 DK 0458802T3
Authority
DK
Denmark
Prior art keywords
data
telegrams
channel
errors
detected
Prior art date
Application number
DK90902154.5T
Other languages
Danish (da)
Inventor
Norbert Geduhn
Hans-Heinric Schmidt-Kanefendt
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of DK0458802T3 publication Critical patent/DK0458802T3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/1608—Error detection by comparing the output signals of redundant hardware
    • G06F11/1625—Error detection by comparing the output signals of redundant hardware in communications, e.g. transmission, interfaces
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1415—Saving, restoring, recovering or retrying at system level
    • G06F11/1443—Transmit or communication errors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0751—Error or fault detection not based on redundancy
    • G06F11/0754—Error or fault detection not based on redundancy by exceeding limits
    • G06F11/0757—Error or fault detection not based on redundancy by exceeding limits by exceeding a time limit, i.e. time-out, e.g. watchdogs

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Hardware Redundancy (AREA)
  • Selective Calling Equipment (AREA)
  • Safety Devices In Control Systems (AREA)
  • Communication Control (AREA)
  • Cash Registers Or Receiving Machines (AREA)

Abstract

A multicomputer system comprises individual computers which communicate through two separate channels (K1, K2). If one channel fails, data transmission continues in single-channel operation through the remaining channel and errors in the data continue to be detected with higher redundancy. Each receiving computer (E) acknowledges reception of the transmitted data telegrams (A1.1(K), A1.2(K)), in the correct order, to the emitting computer (S). If the acknowledgement is not made or is incomplete, the emitting computer (S) permits, after an acknowledgement monitoring time, the repetition of the data telegram (WA1.1(L), WA1.2(L)), in which errors are detected with higher redundancy. If said data telegrams are received in the correct order and acknowledged by means of corresponding acknowledgement messages (Q1.1(L), Q1.2(L)) through two channels, the emitting computer and subsequently the receiving computer resume two-channel data transmission in which errors in the data telegrams (A2.1(K), A2.2(K); Q2.1(K), Q@.2(K)) are not detected with higher redundancy. As long as the computers have not yet permanently switched over to single-channel transmission of data telegrams and acknowledgements in which the errors are detected by higher redundancy, a time monitoring (TÜZ) for a maximal permissible time shift between the two telegrams of a pair of data telegrams or pair of acknowledgement telegrams is triggered on the receiving side of the data telegrams or acknowledgements with each first received telegram, at the expiry of which period the received telegram is rejected.
DK90902154.5T 1989-02-16 1990-02-02 Procedure for operating a signal technically secure multidata system DK0458802T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3904747 1989-02-16

Publications (1)

Publication Number Publication Date
DK0458802T3 true DK0458802T3 (en) 1994-10-10

Family

ID=6374270

Family Applications (1)

Application Number Title Priority Date Filing Date
DK90902154.5T DK0458802T3 (en) 1989-02-16 1990-02-02 Procedure for operating a signal technically secure multidata system

Country Status (6)

Country Link
EP (1) EP0458802B1 (en)
AT (1) ATE105953T1 (en)
DE (1) DE59005756D1 (en)
DK (1) DK0458802T3 (en)
WO (1) WO1990009632A1 (en)
ZA (1) ZA901190B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934131A (en) * 1975-01-06 1976-01-20 The Unites States Of America As Represented By The Secretary Of The Navy Output controller for initiating delayed or conditional commands via a general purpose computer
DE3423217C2 (en) * 1984-06-22 1993-09-30 Siemens Ag Process for the secure transmission of information between data stations
DE3442418A1 (en) * 1984-11-20 1986-05-22 Siemens AG, 1000 Berlin und 8000 München METHOD FOR OPERATING A SIGNAL-SECURE MULTIPLE COMPUTER SYSTEM WITH MULTIPLE SIGNAL-NON-SECURE IN / OUTPUT ASSEMBLIES
EP0214474B1 (en) * 1985-09-11 1990-04-11 Siemens Aktiengesellschaft Method and circuit arrangement for the transmission of data signals between control devices interconnected by a loop system

Also Published As

Publication number Publication date
ZA901190B (en) 1991-01-30
DE59005756D1 (en) 1994-06-23
ATE105953T1 (en) 1994-06-15
WO1990009632A1 (en) 1990-08-23
EP0458802B1 (en) 1994-05-18
EP0458802A1 (en) 1991-12-04

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