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. 28, 2012
Filed:
Nov. 19, 2007
Yoshikazu Isoyama, Yokkaichi, JP;
Yoshikazu Isoyama, Yokkaichi, JP;
Autonetworks Technologies, Ltd., Mie, JP;
Sumitomo Wiring Systems, Ltd., Mie, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A Relay connection unit connects networks connected to ECUs via multiple communication lines and relays signals transmitted/received between the ECUs belonging to the different networks. The relay connection unit comprises a recording part that records the relationship between ECUs that currently transmit/receive signals to/from each other; a buffer part that records transmission completion times at which the relay connection unit transmits signals received from ECUs to the networks to which other ECUs of relay destination belong; and a communication abnormality determining part that determine a time difference (T) between the transmission completion time corresponding to a network, for which the signal transmission has been completed the earliest, and each of the transmission completion times corresponding to the other networks for which signal transmissions have been completed and that determines that the signal transmission to a network for which the corresponding time difference is equal to or greater than a predetermined time is a communication delay.