GB1373014A - Processor security arrangements - Google Patents

Processor security arrangements

Info

Publication number
GB1373014A
GB1373014A GB1256871A GB1256871A GB1373014A GB 1373014 A GB1373014 A GB 1373014A GB 1256871 A GB1256871 A GB 1256871A GB 1256871 A GB1256871 A GB 1256871A GB 1373014 A GB1373014 A GB 1373014A
Authority
GB
United Kingdom
Prior art keywords
processors
output
processor
circuit
outputs
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.)
Expired
Application number
GB1256871A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB1256871A priority Critical patent/GB1373014A/en
Publication of GB1373014A publication Critical patent/GB1373014A/en
Expired legal-status Critical Current

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
    • G06F11/18—Error detection or correction of the data by redundancy in hardware using passive fault-masking of the redundant circuits
    • G06F11/183—Error detection or correction of the data by redundancy in hardware using passive fault-masking of the redundant circuits by voting, the voting not being performed by the redundant components
    • G06F11/184—Error detection or correction of the data by redundancy in hardware using passive fault-masking of the redundant circuits by voting, the voting not being performed by the redundant components where the redundant components implement processing functionality
    • 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
    • G06F11/1629—Error detection by comparing the output of redundant processing systems
    • G06F11/165—Error detection by comparing the output of redundant processing systems with continued operation after detection of the error
    • 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
    • G06F11/1629—Error detection by comparing the output of redundant processing systems
    • G06F11/1641—Error detection by comparing the output of redundant processing systems where the comparison is not performed by the redundant processing components
    • 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
    • G06F11/18—Error detection or correction of the data by redundancy in hardware using passive fault-masking of the redundant circuits
    • G06F11/181—Eliminating the failing redundant component

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Hardware Redundancy (AREA)
  • Multi Processors (AREA)

Abstract

1373014 Data processing systems MARCONI CO Ltd 23 March 1972 [1 May 1971] 12568/71 Heading G4A Three processors 6-8 are connected to a majority voting circuit 9 and to an arrangement 14 which detects when, following a non- unanimous output from circuit 9, there is disagreement between the remaining two processors, a diagnostic investigation of at least one of the two remaining processors then being carried out to determine which of the two is in error, and a circuit 19 for by-passing the output of the one remaining correctly functioning processor to the output of the majority voting circuit 9. The arrangement 14 provides an output 15 indicating non-unanimous processor outputs and outputs 16-18 collectively indicating which single processor is in error. If a second processor goes faulty, all of outputs 15-18 are activated, and the two previously correct processors are, for example, given a simple predetermined operation to perform and the results are compared with a correct result stored in controller 42.
GB1256871A 1972-03-23 1972-03-23 Processor security arrangements Expired GB1373014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1256871A GB1373014A (en) 1972-03-23 1972-03-23 Processor security arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1256871A GB1373014A (en) 1972-03-23 1972-03-23 Processor security arrangements

Publications (1)

Publication Number Publication Date
GB1373014A true GB1373014A (en) 1974-11-06

Family

ID=10007047

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1256871A Expired GB1373014A (en) 1972-03-23 1972-03-23 Processor security arrangements

Country Status (1)

Country Link
GB (1) GB1373014A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006310A1 (en) * 1978-06-10 1980-01-09 Westinghouse Brake And Signal Company Limited Railway control signal dynamic output interlocking systems
US4375683A (en) * 1980-11-12 1983-03-01 August Systems Fault tolerant computational system and voter circuit
EP0073602A2 (en) * 1981-08-20 1983-03-09 Westinghouse Brake And Signal Company Limited Combining replicated sub-system outputs
EP0077179A2 (en) * 1981-10-10 1983-04-20 Westinghouse Brake And Signal Company Limited Computer-based interlocking system
GB2122393A (en) * 1982-06-17 1984-01-11 Tokyo Shibaura Electric Co A multiple data processing system
EP0366017A2 (en) * 1988-10-24 1990-05-02 Hitachi, Ltd. Fault tolerant system and method of majority voting
EP0972244A1 (en) * 1997-04-02 2000-01-19 General Dynamics Information Systems, Inc. Fault tolerant computer system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006310A1 (en) * 1978-06-10 1980-01-09 Westinghouse Brake And Signal Company Limited Railway control signal dynamic output interlocking systems
US4375683A (en) * 1980-11-12 1983-03-01 August Systems Fault tolerant computational system and voter circuit
EP0073602A2 (en) * 1981-08-20 1983-03-09 Westinghouse Brake And Signal Company Limited Combining replicated sub-system outputs
EP0073602A3 (en) * 1981-08-20 1984-09-05 Westinghouse Brake And Signal Company Limited Combining replicated sub-system outputs
EP0077179A2 (en) * 1981-10-10 1983-04-20 Westinghouse Brake And Signal Company Limited Computer-based interlocking system
EP0077179A3 (en) * 1981-10-10 1984-08-08 Westinghouse Brake And Signal Company Limited Computer-based interlocking system
GB2122393A (en) * 1982-06-17 1984-01-11 Tokyo Shibaura Electric Co A multiple data processing system
US5029071A (en) * 1982-06-17 1991-07-02 Tokyo Shibaura Denki Kabushiki Kaisha Multiple data processing system with a diagnostic function
EP0366017A2 (en) * 1988-10-24 1990-05-02 Hitachi, Ltd. Fault tolerant system and method of majority voting
EP0366017A3 (en) * 1988-10-24 1991-06-12 Hitachi, Ltd. Fault tolerant system and method of majority voting
EP0972244A1 (en) * 1997-04-02 2000-01-19 General Dynamics Information Systems, Inc. Fault tolerant computer system
EP0972244A4 (en) * 1997-04-02 2000-11-15 Gen Dynamics Inf Systems Inc Fault tolerant computer system

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees