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:
Dec. 06, 2011
Filed:
Jan. 05, 2007
Masahiro Sakauchi, Tokyo, JP;
Daisaku Ogasahara, Tokyo, JP;
Masahiro Sakauchi, Tokyo, JP;
Daisaku Ogasahara, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a ring network to which a plurality of nodes are connected, even though a failure occurs in a link between a node and a client apparatus (a user terminal) or a node itself, communication between the node and the client apparatus can be achieved. Nodes () and () are provided, so that, even though a failure occurs at either one of the nodes in the link between the node and the client apparatus (), communication can be done between the other node and the client apparatus () through the link. When the node () has a failure, the node () succeeds in operation of the node () while the node () holds a state of the node () to avoid a steering operation or a lap protection operation, a packet disappearance in the packet ring caused by the operation, influence of traffics a packet route change, etc., consumption of CPU and memory resources, and a ring transfer band reduction.