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:
Aug. 03, 1999
Filed:
Jun. 26, 1996
Toshiyuki Fukui, Kawasaki, JP;
Kazumasa Hamaguchi, Yokohama, JP;
Tomohiko Shimoyama, Yokohama, JP;
Shuichi Nakamura, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An information processing system has a plurality of nodes each including one or more CPUs that utilize monitoring of a common bus, wherein the plurality of nodes are connected to one another by a connection path that cannot monitor information on an internal bus in each node. Information required to perform synchronized operation in a node or among nodes is transmitted to an arbiter via an optical fiber serving as a transmission path different from the connection path, and part of this information is again distributed from the arbiter to each of the nodes based upon the information. The system operates in such a manner that the information is reflected in its own node based upon the re-distributed information. Further, in order to perform the synchronized operation among CPUs based upon the re-distributed information, the system controls the information to be distributed from each node to arbiter. Thus, when an operation for maintaining synchronization among CPUs is performed, the present invention enables the system to reduce processing which accompanies synchronizing operation by CPUs across nodes and improve the processing capability of the entire system.