The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Jun. 05, 2018

Filed:

Nov. 24, 2015
Applicant:

The Charles Stark Draper Laboratory, Inc., Cambridge, MA (US);

Inventors:

Samuel Beilin, Cambridge, MA (US);

David Crane, Cambridge, MA (US);

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 15/16 (2006.01); H04L 7/00 (2006.01); H04L 29/08 (2006.01);
U.S. Cl.
CPC ...
H04L 7/0008 (2013.01); H04L 67/10 (2013.01);
Abstract

Systems and methods are disclosed herein for a replicated fault-tolerant computer system. The system includes a triplet of network elements, which each maintain a clock signal, and a clock monitor at each network element for monitoring incoming clock signals. Each network interfaces with a fault containment region (FCR). The system provides the ability to transition from a duplex system to a triplex system if one of the previously offline FCRs can be brought back online. The network elements can determine or receive notification that the previously offline FCR can be brought back online, align their respective clock signals, and synchronize the memory state of the previously offline FCR. The system can then operate in a fault-tolerant, replicated triplex operating mode.


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