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:
Feb. 16, 2016
Filed:
Feb. 06, 2012
Seiji Kozaki, Tokyo, JP;
Kenichi Nakura, Tokyo, JP;
Yoshifumi Hotta, Tokyo, JP;
Jun Mizuguchi, Tokyo, JP;
Seiji Kozaki, Tokyo, JP;
Kenichi Nakura, Tokyo, JP;
Yoshifumi Hotta, Tokyo, JP;
Jun Mizuguchi, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A time synchronization method for a communication system configured to perform protection switching, the communication system including a first network in which a master station and a slave station are connected via plural physical lines including a working line and a backup line and a second network connected to the slave station, the method including a time synchronization in which the slave station executes, when not detecting a communication failure of a downlink signal transmitted from the master station, synchronization processing for synchronizing, based on a clock of the slave station and timing information, time information transmitted to the second network with time information included in a time synchronization command and suppresses, when detecting a communication failure or receiving a switching notification from the master station apparatus, a synchronization error due to a difference between the clock of the slave station and the timing information.