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:
Sep. 21, 2010
Filed:
Dec. 26, 2007
Takuro Mori, Hachioji, JP;
Kazuma Yumoto, Fuchu, JP;
Hitoshi Yoshida, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Erroneous detection of a failure in spite of the absence of failure on the route on account of a communication delay is to be prevented. A node device detects a failure on the route to a remote node device is detected by a failure to receive a packet from the remote node device after the elapse of a determined detection time. The node device sets 'remote system transmission interval×detection multiplier' to be a first detecting time on the basis of a packet transmission interval determined by negotiation with the remote node device. It also sets the sum of 'remote system actual transmission interval ×detection multiplier' and “tolerable delay time” to be a second detecting time. The first detecting time and the second detecting time are compared, and what is longer is determined as the detecting time to be applied to actual operation.