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:
Apr. 25, 2017
Filed:
Jan. 02, 2015
Applicant:
Hitachi Metals, Ltd., Minato-ku, Tokyo, JP;
Inventor:
Kazutoshi Kariya, Tsuchiura, JP;
Assignee:
Hitachi Metals, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 12/56 (2006.01); H04L 29/06 (2006.01); H04L 29/08 (2006.01); H04L 29/12 (2006.01); H04L 12/741 (2013.01); H04L 12/933 (2013.01);
U.S. Cl.
CPC ...
H04L 45/745 (2013.01); H04L 49/102 (2013.01);
Abstract
A ring control unit controls the ring network by transmitting and receiving a control frame through ring ports, and receives an address table deletion command via the control frame. When a first deletion command is received, an address table processing unit prohibits a learning process to the address table and then starts deleting the address table. Then, when a N-th (N is an integer of 2 or more) deletion command is received in a period before the completion of the deletion of the address table, the address table processing unit continues to execute the deletion of the address table.