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. 04, 2018
Filed:
May. 17, 2013
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Chiyoda-Ku, Tokyo, JP;
Abstract
A communication apparatus that forms, in a train in which fixed formations are coupled, a backbone network relaying signals between branch networks formed in the fixed formations with another communication apparatus that is made redundant, includes: a VRRP functional unit that, when operating as a master, periodically transmits an alive monitoring frame to another communication apparatus operating as a backup via the branch network, and, when operating as a backup, receives an alive monitoring frame transmitted from another communication apparatus operating as a master via the branch network; a port-malfunction detection unit detecting malfunction of the port to which the branch network is connected; and an alive determination unit that, when operating as a backup, detects whether another communication apparatus operating as a master has malfunctioned based on an alive-monitoring-frame reception result from the VRRP functional unit and a malfunction detection result from the port-malfunction detection unit.