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.
Patent No.:
Date of Patent:
Jan. 26, 2010
Filed:
Dec. 14, 2005
Fumitoshi Mizutani, Tokyo, JP;
Fumitoshi Mizutani, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A fault-tolerant computer is capable of performing a data flow control process in a short period of time. The fault-tolerant computer includes a pair of duplicate systems each having a CPU subsystem and an IO subsystem. The IO subsystems of the duplicate systems are connected to each other through a cross link. The CPU system has an inbound reception buffer which receives data sent from the IO subsystem, and when the amount of the received data reaches a first threshold value, sends a first signal to the IO subsystem, and when the amount of the received data reaches a second threshold value greater than the first threshold value, sends a second signal to the IO subsystem. The IO subsystem has an IO I/F controller to stop sending data to the CPU subsystem when the IO I/F controller receives the first signal and the second signal, and a flow controller to send the second signal to the IO I/F controller of the paired IO subsystem through the cross link after the flow controller receives the second signal.