Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2009-05-05
2011-11-29
McCarthy, Christopher (Department: 2113)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
Reexamination Certificate
active
08069367
ABSTRACT:
An apparatus and method for train control utilizing virtual lock stepping are disclosed. In accordance with the illustrative embodiment, an improved method of train control utilizes identical software applications executing on redundant processors. The redundant processors are maintained in virtual lock step to ensure the safety integrity of the overall system being controlled. In accordance with the illustrative embodiment, one software process is a master and one software process is a slave. The master and the slave both independently execute application logic based upon detected events (e.g., input data, etc.). In order to ensure that any anomalies that might result in a hazard are detected in the timeliest manner, and that false anomalies are minimized, the redundant software processes must process the same event within a specified time frame.
REFERENCES:
patent: 5088021 (1992-02-01), McLaughlin et al.
patent: 5157780 (1992-10-01), Stewart et al.
patent: 5862502 (1999-01-01), Giers
patent: 6135396 (2000-10-01), Whitfield et al.
patent: 6393582 (2002-05-01), Klecka et al.
patent: 6622068 (2003-09-01), Hawthorne
patent: 6654648 (2003-11-01), Nada et al.
patent: 6658595 (2003-12-01), Thamattoor
patent: 7383469 (2008-06-01), Yang
patent: 7853824 (2010-12-01), Tai
patent: 2003/0105561 (2003-06-01), Nickles et al.
patent: 2010/0049268 (2010-02-01), Martins
patent: 2010/0185472 (2010-07-01), Goodermuth et al.
Satarkar, Pradnya, “AU Application No. 201020446 Office Action Jul. 15, 2011”, , Publisher: IPA, Published in: AU.
Golowner Jeffrey H.
Meyer Gerhard F.
DeMont & Breyer LLC
Lockheed Martin Corporation
McCarthy Christopher
LandOfFree
Virtual lock stepping in a vital processing environment for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Virtual lock stepping in a vital processing environment for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Virtual lock stepping in a vital processing environment for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4254248