EP 4355633 A1 20240424 - AUTOMATICALLY DETECTING AND CORRECTING MEMORY ERRORS IN A SECURE MULTI-CHANNEL COMPUTER
Title (en)
AUTOMATICALLY DETECTING AND CORRECTING MEMORY ERRORS IN A SECURE MULTI-CHANNEL COMPUTER
Title (de)
AUTOMATISCHES ERKENNEN UND KORRIGIEREN VON SPEICHERFEHLERN IN EINEM SICHEREN MEHRKANALIGEN RECHNER
Title (fr)
DÉTECTION ET CORRECTION AUTOMATIQUES D'ERREURS DE MÉMOIRE DANS UN ORDINATEUR MULTICANAL SÉCURISÉ
Publication
Application
Priority
- DE 102021209038 A 20210818
- EP 2022071326 W 20220729
Abstract (en)
[origin: WO2023020807A1] The invention relates to a method for automatically detecting and correcting memory errors in a secure multi-channel computer (7) of a railway system (1), each channel (8, 9) of the computer (7) having at least one memory device (13, 14) and the same data being stored in parallel in the memory devices (13, 14) of the channels (8, 9). In order to provide a reliable method without needing additional hardware, according to the invention: a first check value (17) is calculated for data in a sub-region (28) of the first memory device (13); a second check value (19) is calculated for the same data in a sub-region (28) of the second memory device (14); the first and the second check value (17, 19) are compared with one another; if the first and the second check value (17, 19) are different, the first check value (17) and/or the second check value (19) are compared with an old check value (23); the data in the sub-region (28) of the first memory device (13) are replaced by the data in the sub-region (28) of the second memory device (14) if the second check value (19) corresponds to the old check value (23); and the data in the sub-region (28) of the second memory device (14) are replaced by the data in the sub-region (28) of the first memory device (13) if the first check value (17) corresponds to the old check value (22).
IPC 8 full level
B61L 15/00 (2006.01); B61L 27/30 (2022.01)
CPC (source: EP)
B61L 15/0063 (2013.01); B61L 27/30 (2022.01)
Citation (search report)
See references of WO 2023020807A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DE 102021209038 A1 20230223; CN 117769698 A 20240326; EP 4355633 A1 20240424; WO 2023020807 A1 20230223
DOCDB simple family (application)
DE 102021209038 A 20210818; CN 202280053317 A 20220729; EP 2022071326 W 20220729; EP 22758465 A 20220729